GENERAL STATEMENT OF THE CLASS SUBJECT MATTER
This class deals with the transmission of a picture or the recording or reproducing of a sequence of pictures in which the local light variation composing a picture is not subject to the variation of time by methods involving the following steps: Step (1), the scanning of a picture, i.e., the analysis of the whole of a picture-containing area by resolving it into an area or a plurality of areas of which at least one of the two dimensions is elemental, simultaneously or in a sequence, and the derivation in response thereto of a picture-representative electric signal; and Step (2), the reproduction of the whole of a picture-containing area by the reproduction in response to a picture-representative electric
signal of an area or a plurality of areas of which at least one of the two dimensions is elemental, simultaneously or in a sequence.
In this class Pictorial Communication Systems are those systems for the transmission and reproduction of arbitrarily composed pictures in which the local light variations composing a picture are not subject to variation with time, e.g., documents (both written and printed), maps, charts, photographs (other than motion picture film).
SUBCOMBINATIONS OF PICTORIAL COMMUNICATION SYSTEMS
This class includes circuits specially designed for dealing with pictorial communication signals, as distinct from merely signals of a particular frequency range.
Electrical circuits not specific to pictorial communication which may constitute subcombinations of such apparatus are classified in the appropriate class for such circuits.

LINES WITH OTHER CLASSES AND WITHIN THIS CLASS
COMBINATIONS OF OTHER APPARATUS WHICH INCLUDE APPARATUS OF THIS CLASS
This class does not include the following subject matter:
1. Systems in which legible alphanumeric or like character forms are analyzed according to Step (1) to derive an electric signal from which the character is recognized by comparison with stored information, which are dealt with elsewhere. (See References to Other Classes, below.)
2. Systems for the direct photos:graphic copying of an original picture in which an electric signal representative of a characteristic of the picture is derived and employed to modify the operation of the system, which are dealt with elsewhere. (See References to Other Classes, below.)
3. Systems for the reproduction according to Step (2) of pictures comprising alphanumeric or like character forms but involving the production of the equivalent of a signal which would be derived by Step (1), e.g., by cams, punched card or tape, coded control signal or other means, which are dealt with elsewhere. (See References to Other Classes, below.)

REFERENCES TO OTHER CLASSES

SEE OR SEARCH CLASS:
73, Measuring and Testing, 596 for measuring and testing apparatus including acoustic imaging.
205, Electrolysis: Processes, Compositions Used Therein, and Methods of Preparing the Compositions, 52 for electrolytic marking
250, Radiant Energy, 200 and 216+ photocells, circuits and optics therefor; subclasses 330+ and 338+ for devices responsive to invisible radiation.
312, Supports: Cabinet Structure, 7.1, television cabinets.
313, Electric Lamp and Discharge Devices, 364, cathode-ray tubes.
315, Electric Lamp and Discharge Devices: Systems, 1, cathode-ray tube circuits.
318, Electricity: Motive Power Systems, subclass 41 and 85 synchronization circuitry.
324, Electricity: Measuring and Testing, 76.12, analysis of complex waves.
327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems, particularly 1 for miscellaneous signal discriminating or separating and subclasses 100+ for miscellaneous signal production or conversion.
329, Demodulators. 311, 315+, 345+, and 347+, for pulse, frequency, phase, or amplitude demodulators, respectively.
330, Amplifiers, subclass 11, D.C. reinsertion circuit; subclasses 127+, control of power supply, and subclass 149, noise compensation.
331, Oscillators, subclass 20 and 172, television type oscillator synchronization.
332, Modulators, various subclasses, modulators.
333, Wave Transmission Lines and Networks, subclass 14 and 24+, companders and coupling networks.
334, Tuners, various subclasses, tuners.
341, Coded Data Generation or Conversion, appropriate subclasses for code converters wherein the signal may be encoded to reduce bandwidth.
342, Communications: Directive Radio Wave Systems and Devices (e.g., Radar, Radio Navigation), subclasses 1-205 radar systems.
345, Computer Graphics Processing, Operator Interface Processing, and Selective Visual Display Systems, 112 and 418+ for computer s:graphics processing and subclasses 326+ for a computer operator interface.
345, Computer Graphics Processing, Operator Interface Processing, and Selective Visual Display Systems, 1 for plural display systems. (Lines With Other Classes and Within
This Class, "Combinations of Other Apparatus Which Include Apparatus of This Class")
346, Recorders, 150.1 for electric recording of phenomenon, particularly subclasses 150.2 for electrical discharge and 150.3 for electrochemical; subclass 134, particular record receivers; subclass 139, scanning devices for markers, and subclasses 107.1+ for light or beam recording of phenomenon.
347, Incremental Printing of Symbolic Information, 112 for electrostatic marking, particularly subclasses 129+ for photo scanning, subclasses 224+ for light or beam marking.
348, Television, for television camera, video display, transmission or general television signal processing of a sequence of images which can portray motion.
352, Optics: Motion Pictures, subclass 4 and 131, prompters and motion picture-television combinations, and subclasses 166+, projector drive mechanisms.
355, Photocopying, subclass 20, and 84 for light source and scanning light source, respectively.
355, Photocopying, subclass 38 for systems for the direct photos:graphic copying of an original picture in which an electric signal representative of a characteristic of the picture is derived and employed to modify the operation of the system. (Lines With Other Classes and Within This Class, "Combinations of Other Apparatus Which Include Apparatus of This Class")
356, Optics: Measuring and Testing, 3, range or distance measurement; subclasses 426+ and 237.1+ for inspection devices, and subclasses 402+, shade or color measuring.
359, Optics: Systems (Including Communication) and Elements, various subclasses for optical devices, especially 1, holography; subclasses 196+ and 887, light beam deflectors and sequentially additive filters.
360, Dynamic Magnetic Information Storage or Retrieval, 9.1, 14.1+, 19.1, 33.1+ for dynamic magnetic recorders peculiar to noncolor television signal processing.
361, Electricity: Electrical Systems and Devices, subclass 243 for synchronization of shafts; and subclasses 173+ and 211 for a photosensitive device in circuits for electromagnets.
365, Static Information Storage and Retrieval, appropriate subclass. The storage of information, which includes video signal processing, is excluded from this class.
369, Dynamic Information Storage or Retrieval, appropriate subclasses for recording or reproducing information absent any feature peculiar to video processing.
370, Multiplex Communications, appropriate subclasses for multiplex systems in general.
380, Cryptography, subclasses 200-242 for cryptographic video equipment and techniques, and subclasses 243 for facsimile cryptography.
382, Image Analysis, 181 for pattern recognition or alphanumeric character sensing.
382, Image Analysis, for systems in which legible alphanumeric or like character forms are analyzed according to the Class Definition, General Statement of the Subject Matter, Step (1), above, to derive an electric signal from which the character is recognized by comparison with stored information. (Lines With Other Classes and Within This Class, "Combinations of Other Apparatus Which Include Apparatus of This Class")
385, Optics Waveguides, appropriate subclasses for fiber optics, per se.
386, Television Signal Processing for Dynamic Recording or Reproducing, 1 and 46+ for recording or reproducing of color or black and white television signal.
395, Information Processing System Organization, 80 for data processing of robot control systems, 180+ for digital processing reliability and availability, 200.3+ for multiple computer data transfer, and 821 through 894 for transferring data from one or more peripherals to one or more computers for the latter to process, store, or further transfer or for transferring data from computers to peripherals.
396, Photography, various subclasses, pictorial information recording devices.
399, Electrophotography, 9 for diagnostics, subclasses 38+ for controls, subclasses 130+ for image formation, subclasses 168+ for charging, subclasses 177+ for exposure, subclasses 222+ for development, subclasses 297+ for transfer, subclasses 320+ for fixing, subclasses 343+ for cleaning, and subclasses 361+ for document handling.
409, Gear Cutting, Milling, or Planing, 2, 79+, 245+, and 289+ for a pattern controlled device including scanning.
430, Radiation Imagery Chemistry: Process, Composition, or Product Thereof, appropriate subclasses for process, composition, and product involving radiation imagery chemistry.
434, Education and Demonstration, subclass 307, teaching devices including television combinations.
455, Telecommunications, various subclasses, transmitters and
receivers.
505, Superconductor Technology: Apparatus, Material, Process, 150 for high temperature (T[subscrpt]c[end subscrpt] 30 K) superconducting devices, particularly subclasses 181+ for photoconductive, light transmissive, light emissive, or light responsive devices, or subclasses 202+ for electrical communication systems.
704, Data Processing: Speech Signal Processing, Linguistics, Language Translation and Audio Compression/Decompression, 200 for artificial intelligence systems that process speech signals, subclassees 500 through 504 for bandwidth, or time compression, or expansion of audio signals.
706, Data Processing: Intelligent Processing Systems and Methods, various subclasses for artificial intelligence systems that represent, apply, and acquire knowledge.
707, Data Processing: Database and File Management, Data Structures, or Document Processing, 500 for document processing.

Run length encoding:
This subclass is indented under subclass 426. Subject matter including apparatus for sensing and counting the number of consecutive elemental areas in which a given signal level exists and transmitting a signal representative of the count or a signal that is encoded to represent the count.

SEE OR SEARCH CLASS:
341, Coded Data Generation or Conversion, 173 for code transmitters, and subclasses 50+ for code converters.

Predictive or adaptive encoding:
This subclass is indented under subclass 261.1. Subject matter for converting facsimile signals to or from digital signals wherein the coding of the current information varies depending upon the nature of the previous information.

SEE OR SEARCH CLASS:
341, Coded Data Generation or Conversion, subclass 51 for adaptive digital to digital code converters.

Two dimensional encoding:
This subclass is indented under subclass 261.1. Subject matter where the run length extends over more than one scan line.

Having addressable memory:
This subclass is indented under subclass 261.1. Subject matter including a random access storage device.

SEE OR SEARCH CLASS:
365, Static Information Storage and Retrieval, appropriate subclasses for addressable memories, per se.

Two level to three level:
This subclass is indented under subclass 426. Subject matter wherein the excursions of the signal above its lower level or the average D.C. level of the signal is altered such that the signal level periodically alternates above and below a zero D.C. level.

Recording apparatus:
This subclass is indented under subclass 400. Subject matter including structure to reproduce a picture by making a permanent record from the received picture signal on a record carrier.

SEE OR SEARCH CLASS:
346, Recorders, appropriate subclasses for particular recording apparatus.

Ablative:
This subclass is indented under subclass 296. Subject matter wherein the picture is created by removal of portions of the record carrier.

SEE OR SEARCH CLASS:
346, Recorders, subclass 150.2 for electric recording of phenomenal information using electrical discharge (e.g., spark or electroerosion), and subclass 76.1 for thermal recorders.
347, Incremental Printing of Symbolic Information, 159 for apparatus and processes using electrical discharge (e.g., spark or electroerosion) to mark the record receiver, and subclasses 171+ for thermal marking.

Halftone:
This subclass is indented under subclass 296. Subject matter including apparatus to create a halftone picture.

Engraving:
This subclass is indented under subclass 298. Subject matter wherein the halftone picture is created by selectively removing material from the record carrier.

Electrostatic or electrolytic:
This subclass is indented under subclass 296. Subject matter wherein the picture is created by selectively applying a varying charge pattern to the record carrier in accordance with the picture signal and permanently affixing charged toner particles in amounts dependent on the charge, or by transmitting a current through the record carrier to selectively discolor the record.

SEE OR SEARCH CLASS:
346, Recorders, subclass 150.3 for electrochemical recording of phenomenal information.
347, Incremental Printing of Symbolic Information, 112 and
163+ for electrostatic marking and electrochemical marking respectively.
399, Electrophotography, 9 for diagnostics, subclasses 38+ for controls, subclasses 130+ for image formation, subclasses 168+ for charging, subclasses 177+ for exposure, subclasses 222+ for development, subclasses 297+ for transfer, subclasses 320+ for fixing, subclasses 343+ for cleaning, and subclasses 361+ for document handling.

Magnetic:
This subclass is indented under subclass 296. Subject matter wherein the record carrier is magnetized in accordance with the picture signal and charged toner particles are affixed in amounts dependent on the magnetization of the record carrier.
(1) Note. Only apparatus which produces a visibly readable record is included here. Apparatus for producing a nonvisible record by magnetization is in Class 360, Dynamic Magnetic Information Storage or Retrieval.
(2) Note. The toner particles may be affixed permanently to the magnetized record carrier or transferred to a separate record carrier.

Photos:graphic:
This subclass is indented under subclass 296. Subject matter wherein the record carrier is a photosensitive medium.

SEE OR SEARCH CLASS:
346, Recorders, 107.1 for optical recording of phenomenal information.
347, Incremental Printing of Symbolic Information, 224 for radiation marking.
386, Television Signal Processing for Dynamic Recording or Reproducing, 42 and 128+ for recording or reproducing color and black and white television signal using light or beam.
399, Electrophotography, 9 for diagnostics, subclasses 38+ for controls, subclasses 130+ for image formation, subclasses 168+ for charging, subclasses 177+ for exposure, subclasses 222+ for development, subclasses 297+ for transfer, subclasses 320+ for fixing, subclasses 343+ for cleaning, and
subclasses 361+ for document handling.

Pressure (e.g., on carbon paper):
This subclass is indented under subclass 296. Subject matter wherein the picture is created by selectively exerting pressure on a medium that transfers toner to a record carrier in accordance with the applied pressure.

With paper cutter:
This subclass is indented under subclass 296. Subject matter including means to sever from a length of record carrier, the portion that contains a reproduced picture.

MISCELLANEOUS:
This subclass is indented under the class definition. Subject matter relating to systems, transmitters or receivers specific to television or facsimile systems and not provided for in any of the preceding subclasses of this class.

FACSIMILE:
This subclass is indented under the class definition. Subject matter including generating and transmitting, recording, reproducing, or displaying a scanned image representative electrical signal in which the local light variations composing the image are not subject to variation with time.
(1) Note. Image includes s:graphical, text or pictorial matter.

SEE OR SEARCH CLASS:
178, Telegraphy, subclass 37 for secret (i.e., automatic) insertion of printing telegraph recorder paper into an envelope.
345, Computer Graphics Processing, Operator Interface
Processing, and Selective Visual Display Systems, subclasses 467-472 for character font generation and subclasses 326+ for operator interface processing.
347, Incremental Printing of Symbolic Information, 224 for radiation marking, particularly subclasses 225+ for marking a medium by scanning the medium with a writing beam (e.g., light, electron), and subclasses 129+ for generic electric marker where an electrostatic image is formed on a medium or discharged from a medium by scanning the medium with a beam of light.
371, Error Detection/Correction and Fault Detection/Recovery, appropriate subclasses for error detection, correction, recovery or prevention in pulse code data or computers.
379, Telephonic Communications, 93 for digital facsimile and subclass 100 for facsimile combined with a telephone or telephone system.
380, Cryptography, subclasses 243-246 for encrypted facsimile transmission.
395, Information Processing System Organization, 80 for data processing of robot control systems 186+ for security.
399, Electrophotography, for electrophotos:graphic devices without facsimile signal or without electric signal control of the light used to form the electrophotos:graphic image, 9 for diagnostics, subclasses 38+ for controls, subclasses 130+ for image formation, subclasses 168+ for charging, subclasses 177+ for exposure, subclasses 222+ for development, subclasses 297+ for transfer, subclasses 320+ for fixing, subclasses 343+ for cleaning, and subclasses 361+ for document handling.
430, Radiation Imagery Chemistry: Process, Composition, or Product Thereof, 31, for electrophotos:graphic methods without facsimile signal production or reception or without electric signal control of the light used to form the electrophotos:graphic image.
704, Data Processing: Speech Signal Processing, Linguistics, Language Translation and Audio Compression/Decompression, 200 for artificial intelligence systems that process speech signals, subclassees 500 through 504 for bandwidth, or time compression, or expansion of audio signals.
706, Data Processing: Intelligent Processing Systems and Methods, various subclasses for artificial intelligence systems that represent, apply, and acquire knowledge.
707, Data Processing: Database And File Management, Data Structures, or Document Processing, subclasses 500-542 for document processing performed by a computer for presentation.
709, Electrical Computers and Digital Processing Systems: Multiple Computer or Process Coordinating, 200 for data transferring among multiple computer systems.
710, Electrical Computers and Digital Data Processing Systems: Input/Output, 1 for transferring data from one or more peripherals to one or more computers for the latter to process, store, or further transfer or for transferring data from the computers to the peripherals.

Image reproduction system:
This subclass is indented under subclass 400. Subject matter wherein an image is converted into an electrical signal and then converted into another image without transmission of the signal to a remote location (e.g., a copier).

SEE OR SEARCH CLASS:
399, Electrophotography, for electrophotos:graphic devices without facsimile signal or without electric signal control of the light used to form the electrophotos:graphic image, 9 for diagnostics, subclasses 38+ for controls, subclasses 130+ for image formation, subclasses 168+ for charging, subclasses 177+ for exposure, subclasses 222+ for development, subclasses 297+ for transfer, subclasses 320+ for fixing, subclasses 343+ for cleaning, and subclasses 361+ for document handling.

Electronic mailbox:
This subclass is indented under subclass 400. Subject matter wherein documents are scanned and automatically directed to or transmitted to a designated one of a plurality of receivers for reproduction.

SEE OR SEARCH THIS CLASS, SUBCLASS:
440 for facsimile systems with an auxiliary address signal.
474 for facsimile scanning in general.

SEE OR SEARCH CLASS:
379, Telephonic Communications, subclass 93.24 for an electronic mail at a display station, and subclass 100.08 for an electronic mailbox at a facsimile system combined with a telephone system. for facsimile combined with a telephone or telephone system.

Document filing and retrieval system:
This subclass is indented under subclass 400. Subject matter wherein a document is scanned, assigned a classification and stored or filed, and then retrieved in accordance with the classification.

SEE OR SEARCH THIS CLASS, SUBCLASS:
402 for electronic mailbox systems.
474 for facsimile scanning in general.

Facsimile memory monitoring:
This subclass is indented under subclass 400. Subject matter wherein the status of a memory is detected.
(1) Note. Status includes amount of data in a memory, condition of a memory, etc.

SEE OR SEARCH THIS CLASS, SUBCLASS:
406 for facsimile measuring and testing.

Image transmission accuracy verification:
This subclass is indented under subclass 400. Subject matter wherein a transmitted or scanned image is compared or verified for accuracy (i.e., image abnormality) after transmission.

SEE OR SEARCH THIS CLASS, SUBCLASS:
406 for facsimile measuring and testing.
461 for shade correction.

SEE OR SEARCH CLASS:
356, Optics: Measuring and Testing, subclass 71, document pattern analysis or verification, for related subject matter under not involving a facsimile system.
382, Image Analysis, 309 for related subject matter in general.
714, Error Detection/Correction and Fault Detection/Recovery, appropriate subclasses for data verification in general.

Facsimile measuring, testing or calibrating:
This subclass is indented under subclass 400. Subject matter wherein a facsimile apparatus is monitored, measured, calibrated or tested.

SEE OR SEARCH THIS CLASS, SUBCLASS:
405 for image verification.

SEE OR SEARCH CLASS:
324, Electricity: Measuring and Testing, appropriate subclasses, for electrical measuring and testing.
371, Error Detection/Correction and Fault Detection/Recovery, appropriate subclasses for data verification in general.

Facsimile relay system:
This subclass is indented under subclass 400. Subject matter wherein image information is received form a transmitter, and retransmitted to a receiver without reproduction.

SEE OR SEARCH CLASS:
375, Pulse or Digital Communications, 211 for pulse communications relays.
379, Telephonic Communications, 338 for telephone relays.
455, Telecommunications, 7 for radio relays.

Plural scanner station:
This subclass is indented under subclass 400. Subject matter wherein more than one scanner is employed for image generation at the same station.

SEE OR SEARCH THIS CLASS, SUBCLASS:
474 for facsimile scanning in general.

Synchronization:
This subclass is indented under subclass 400. Subject matter comprising methods or apparatus for maintaining proper time or phase correspondence between a transmitter and a receiver of the facsimile system.

SEE OR SEARCH CLASS:
348, Television, 500 for television synchronization.
361, Electricity: Electrical Systems and Devices, 243 for electrical systems including synchronization of shafts
370, Multiplex Communications, 503 for time division multiplex synchronization.
375, Pulse or Digital Communications, 354 for synchronizers in pulse communications.

Sync or phase pulse generator:
This subclass is indented under subclass 409. Subject matter for the generation or synchronizing or phasing pulses necessary for the proper synchronization between components of the facsimile system.

Facsimile carrier as synchronization signal:
This subclass is indented under subclass 409. Subject matter wherein a video carrier frequency of the transmitted facsimile signal is utilized to convey synchronization information.

Phase or speed regulation:
This subclass is indented under subclass 409. Subject matter
for varying the phase or speed of components of the facsimile system to achieve proper synchronization between such components.

Start - stop:
This subclass is indented under subclass 412. Subject matter wherein synchronization between the components of the system is achieved by stopping the receiver scanning mechanism during each scan cycle and restarting the scan in accordance with a received phase or synchronization signal.

With particular clutch mechanism:
This subclass is indented under subclass 412. Subject matter including a particular device connecting and disconnecting a driving and a driven part of a facsimile mechanism to vary the phase or speed.

With pendulum:
This subclass is indented under subclass 412. Subject matter wherein the phase or speed control is achieved through the use of a body suspended from a fixed point so as to swing freely.

With tuning fork:
This subclass is indented under subclass 412. Subject matter wherein the phase or speed control is achieved by the use of a 2-pronged implement that vibrates with a fixed frequency when struck.

With strobe:
This subclass is indented under subclass 412. Subject matter wherein the phase or speed control is achieved through the
use of a light that flashes at an adjustable rate.

With movable phase shifter:
This subclass is indented under subclass 412. Subject matter wherein the phase or speed control is achieved through the use of a mechanical phase shifter at the receiver.

Receiver motor power transmitted from transmitter:
This subclass is indented under subclass 412. Subject matter wherein the receiver has a motor and power for the motor is transmitted from the transmitter to maintain synchronization.

Receiver motor power source frequency change:
This subclass is indented under subclass 412. Subject matter wherein the phase or speed is regulated by changing the frequency of a source of power of a motor in a receiver.

Receiver motor power source voltage change:
This subclass is indented under subclass 412. Subject matter wherein the phase or speed is regulated by changing the voltage of a power source of a motor in a receiver motor.

Receiver motor power source interruption:
This subclass is indented under subclass 412. Subject matter wherein the phase or speed is regulated by selectively interrupting the power of a receiver motor.

With resistance variable in receiver motor power source:
This subclass is indented under subclass 412. Subject matter including a variable resistance in a power source of a motor to effect phase or speed regulation in a receiver.

Stylus:
This subclass is indented under subclass 412. Subject matter wherein styli which are scanning paths at the transmitter and at the receiver are maintained in proper phase or speed relationship.

SEE OR SEARCH THIS CLASS, SUBCLASS:
478 for stylus scanning.

Multiplex:
This subclass is indented under subclass 400. Subject matter including transmitting plural diverse information signals at the same time.

SEE OR SEARCH CLASS:
348, Television, 473 for multiplex transmission in television.
370, Multiplex Communications, appropriate subclasses for multiplex communications in general.

Time or bandwidth compression:
This subclass is indented under subclass 400. Subject matter wherein the frequency range of the picture signal is reduced to accommodate bandwidth limitations of a transmission medium or wherein the time required to transmit a given amount of information through a given fixed bandwidth medium is reduced.

SEE OR SEARCH CLASS:
348, Television, subclasses 384.1-440.1 for bandwidth reduction techniques in analog television systems.
370, Multiplex Communications, subclass 477 for bandwidth compression or expansion in multiplex communications.
375, Pulse or Digital Communications, subclasses 240-241 for bandwidth compression or expansion in pulse communications, particularly subclasses 240.01-240.29 for digital television bandwidth compression.
382, Image Analysis, 232 for data compression in image analysis systems.
704, Data Processing: Speech Signal Processing, Linguistics, Language Translation, and Audio Compression/Decompression, subclasses 500-504 for bandwidth, or time compression, or expansion of audio signals.

Using Huffman code:
This subclass is indented under subclass 261.1. Subject matter wherein bandwidth compression is achieved by using various code words which are generated based on the probability of character or symbol occurrence.

Interpolation:
This subclass is indented under subclass 426. Subject matter including a determination or estimation of a value or values of a picture signal between two known values or of a trend established between two or more known values of the picture signal.

SEE OR SEARCH CLASS:
708, Electrical Computers: Arithmetic Processing and Calculating, subclass 290 and 847 for interpolation in data processing.

Halftone or grey level processing:
This subclass is indented under subclass 426. Subject matter wherein time or bandwidth compression involves a signal representing a shade of gray between the darkest and the lightest elements of the image.

SEE OR SEARCH THIS CLASS, SUBCLASS:
456 for halftone signal processing in general.

Adaptive or predictive:
This subclass is indented under subclass 426. Subject matter wherein the compression of the current information varies depending upon the nature of the previous information.

SEE OR SEARCH THIS CLASS, SUBCLASS:
261.2 for adaptive or predictive run length encoding of facsimile signals.

SEE OR SEARCH CLASS:
341, Coded Data Generation or Conversion, subclass 51 for adaptive digital to digital code converters.
364, Electrical Computers and Data Processing Systems, 148.01 for adaptive data processing control.

Fill bits or dummy signal:
This subclass is indented under subclass 426. Subject matter wherein the picture signal includes a unit of information inserted solely for the purposes of fulfilling such prescribed conditions as word length or block length without affecting operations.

Two dimensional or orthogonal:
This subclass is indented under subclass 426. Subject matter wherein time or bandwidth compression is based on a value of a picture signal information displaced in two dimensions relative to a reference picture signal information.

SEE OR SEARCH THIS CLASS, SUBCLASS:
261.3 for two dimensional run length encoding.

Block:
This subclass is indented under subclass 432. Subject matter wherein the time or bandwidth compression is based on a matrix of m x n image elements where m and n are both positive integers greater than one but less than the number of image elements in a scan line.

Auxiliary signal:
This subclass is indented under subclass 400. Subject matter including apparatus for transmitting a signal in either direction between a transmitter and a receiver for the purpose of giving instructions to either the transmitter or receiver or to convey information, other than pictorial or synchronization, about events or conditions at either location.

SEE OR SEARCH THIS CLASS, SUBCLASS:
409 for facsimile synchronization.

Transmitter and receiver both supply auxiliary signal(s):
This subclass is indented under subclass 434. Subject matter wherein both the receiver and the transmitter send information to each other.

SEE OR SEARCH CLASS:
379, Telephonic Communications, 100.01 for facsimile combined with a telephone or telephone system.

Auxiliary signal controls apparatus at both transmitter and receiver:
This subclass is indented under subclass 435. Subject matter wherein the auxiliary signal is employed by the transmitter to control the facsimile receiver or vice versa.

Interruption detection and control:
This subclass is indented under subclass 434. Subject matter wherein the auxiliary signal is transmitter upon detection of a break in facsimile operation and is used to control the equipment.

SEE OR SEARCH THIS CLASS, SUBCLASS:
406 for measuring and testing in facsimile.

Transmitter supplies auxiliary signal(s):
This subclass is indented under subclass 434. Subject matter wherein the auxiliary signal is generated in the facsimile transmitter.

Receiver supplies auxiliary signal(s):
This subclass is indented under subclass 434. Subject matter wherein the receiver transmits information to the transmitter.

Telephone number or address of designator:
This subclass is indented under subclass 434. Subject matter wherein the auxiliary signal carries information about the address or telephone number of the sender or recipient of the facsimile transmission.
(1) Note. Class 379, Telephonic Communications provides, in subclasses 100.01+ for facsimile communications combined with a telephone system or part thereof.

SEE OR SEARCH THIS CLASS, SUBCLASS:
402 for facsimile system wherein documents are transmitted to designated receivers.

SEE OR SEARCH CLASS:
340, Communications: Electrical, 825.07 and 825.21 for selective communications with addressing.
360, Dynamic Magnetic Information Storage or Retrieval, subclass 72.2 for magnetic tape recording with recorded
addresses.
370, Multiplex Communications, subclass 312 and 432 for message addressed to multiple destinations, subclasses 352 and 389 for switching a message which includes an address header, and subclass 475 for address transmitted in multiplex communications.
379, Telephonic Communications, 100.01 for facsimile communications with a telephone device.

Facsimile alarm:
This subclass is indented under subclass 434. Subject matter having a humanly perceptible indication of an abnormal condition.

SEE OR SEARCH THIS CLASS, SUBCLASS:
405 for image verification.
406 for facsimile measuring or testing.

Facsimile system interface:
This subclass is indented under subclass 400. Subject matter having provision for enabling a transmitter to be compatible with a receiver and vice versa.

SEE OR SEARCH THIS CLASS, SUBCLASS:
409 for synchronization in facsimile.

Specific signal processing circuitry:
This subclass is indented under subclass 400. Subject matter including specific circuitry for facsimile but not restricted in usability to any single system, signal generator or recorder specifically provided elsewhere in this class.

SEE OR SEARCH CLASS:
348, Television, 607 for noise elimination in a television systems and subclasses 678+ for automatic gain control circuitry used in television systems.

Memory interface:
This subclass is indented under subclass 443. Subject matter wherein a memory interfaces an input and an output of the facsimile systems to cause a significant change in the overall function of the system.

Signal sampling and conversion:
This subclass is indented under subclass 443. Subject matter wherein a facsimile signal is sampled and analog to digital conversion (or vice versa) is performed.

SEE OR SEARCH THIS CLASS, SUBCLASS:
467 for image classification and coding.
470 for conversion of an analog facsimile signal into a coded digital signal.

SEE OR SEARCH CLASS:
341, Coded Data Generation or Conversion, 122 for sampling and conversion in general.

Signal voltage or gain control:
This subclass is indented under subclass 443. Subject matter wherein the voltage or gain of a photocell or amplifier is controlled by specific circuitry responsive to specific conditions.

Subject enhancing:
This subclass is indented under subclass 443. Subject matter including circuitry for modifying or operating on selected portions of the signal to restore or improve detail in the reproduced image.

Image processing:
This subclass is indented under subclass 443. Subject matter wherein an image signal is processed in some manner to either change or improve the image for reproduction.

Document size detection:
This subclass is indented under subclass 448. Subject matter wherein a document or image size is detected for processing image signals generated therefrom.

SEE OR SEARCH THIS CLASS, SUBCLASS:
451 for changing facsimile picture size.

Plural images combined into a single image:
This subclass is indented under subclass 448. Subject matter where more than one image representing signal are combined to form a signal representing one image.

Picture size conversion:
This subclass is indented under subclass 448. Subject matter including apparatus permitting the reproduced picture to be smaller or larger in size than the original picture.

SEE OR SEARCH THIS CLASS, SUBCLASS:
449 for document size detection.

Image editing:
This subclass is indented under subclass 448. Subject matter wherein the image signal is edited by an operator before reproduction or transmission.

Image portion selection:
This subclass is indented under subclass 448. Subject matter wherein a portion of an entire image is selected for specific processing.

Moire effect elimination:
This subclass is indented under subclass 448. Subject matter wherein wavy patterns produced by the convergence of lines are eliminated.

Gray level processing:
This subclass is indented under subclass 448. Subject matter wherein the image signal is processed to reproduce various levels of gray.

Halftone:
This subclass is indented under subclass 455. Subject matter where shades of gray between the darkest and the lightest elements of the image are represented by a pattern of "dots" of varying density.

SEE OR SEARCH THIS CLASS, SUBCLASS:
429 for halftone processing for bandwidth for time compression.

Dither matrix:
This subclass is indented under subclass 456. Subject matter wherein an image signal is thresholded with one or more reference levels which are successively varied.

Gradation or spatial processing:
This subclass is indented under subclass 456. Subject matter wherein a relationship between the optical density of an image and a signal level is controlled or an image is processed to provide emphasis in a specific frequency range.

Variable halftone dot shape or size:
This subclass is indented under subclass 456. Subject matter where the halftone "dot" has a variable shape or size.

Addressable storage:
This subclass is indented under subclass 456. Subject matter including a random access memory.

SEE OR SEARCH CLASS:
365, Static Information Storage and Retrieval, appropriate subclasses for random access memories, per se.

Shade correction:
This subclass is indented under subclass 455. Subject matter wherein a reference signal is used to determine or correct the proper level of the output signal generated by a picture signal generator.

Text and image detection and processing:
This subclass is indented under subclass 448. Subject matter including separate processing for detected s:graphic image and text images within a scanned document.

Noise elimination:
This subclass is indented under subclass 448. Subject matter wherein noise is limited or eliminated during image processing or whereby the signal to noise ratio is improved.

SEE OR SEARCH CLASS:
348, Television, 607 for noise elimination in a television signal.

To distinguish intelligence from background:
This subclass is indented under subclass 448. Subject matter including apparatus to generate a signal wherein a portion of the signal corresponding to intelligence on a document may be readily distinguished from a portion representing a background color of the document.

Picture signal thresholding:
This subclass is indented under subclass 448. Subject matter wherein the picture signal is thresholded by a unique technique for determining the level (black or white) of the picture.

Variable thresholding technique:
This subclass is indented under subclass 465. Subject matter wherein the type of thresholding technique is determined by the image portion being analyzed.

Image classification and coding:
This subclass is indented under subclass 448. Subject matter wherein portions of the image are detected, classified and processed accordingly.

SEE OR SEARCH THIS CLASS, SUBCLASS:
470 for facsimile using coded characters.

Facsimile control unit:
This subclass is indented under subclass 443. Subject matter wherein specific processing circuitry is directed to the control of a facsimile unit.

Carrier wave modulation:
This subclass is indented under subclass 443. Subject matter including circuitry to modulate a signal derived from scanning a picture onto a carrier or including circuitry to demodulate the signal to reconstruct the picture.

SEE OR SEARCH CLASS:
329, Demodulators, appropriate subclasses for demodulators, per se.
332, Modulators, appropriate subclasses for modulators, per se.
348, Television, subclass 724 for transmitter circuitry in television systems including modulators and subclasses 726+ for receiver circuitry in television systems using demodulators.
455, Telecommunications, appropriate subclasses for circuitry to modulate or demodulate a carrier wave.

Coded character:
This subclass is indented under subclass 400. Subject matter including translation of an analog signal derived from scanning each elemental area of a picture into a digital coded signal.
(1) Note. The subject matter in this subclass does not encode the signal for time or bandwidth reduction purposes.

SEE OR SEARCH THIS CLASS, SUBCLASS:
445 for signal sampling and conversion.
426 for encoding the picture signal for time or bandwidth compression purposes.
467 for image classification and coding.

SEE OR SEARCH CLASS:
341, Coded Data Generation or Conversion, 20 and 173+ for code transmitters, and subclasses 126+ for analog to or from digital conversion in general.

Picture signal generator:
This subclass is indented under subclass 400. Subject matter including apparatus or circuitry to detect or convert elemental light variations composing a picture into an electrical signal.

SEE OR SEARCH CLASS:
382, Image Analysis, 312 for related subject matter in general.

Combined read and write head:
This subclass is indented under subclass 471. Subject matter having a device which converts local light variations of a picture into a picture representative signal and converts a picture representative signal into a picture.

Hand held reader:
This subclass is indented under subclass 471. Subject matter having a device which is made to be held in an operator's hand and which converts local light variations into a picture representative signal.

Scanning:
This subclass is indented under subclass 471. Subject matter including apparatus to traverse a surface to derive
information from a image or to reproduce a image.

SEE OR SEARCH THIS CLASS, SUBCLASS:
199 for scanning devices employed in television systems and employing mechanical optical means.
408 for plural scanning stations.

SEE OR SEARCH CLASS:
250, Radiant Energy, 234, for photocell combined with moving optical systems.
359, Optics: Systems (Including Communication) and Elements, 197, for optical scanning systems, per se.

Facsimile illumination control:
This subclass is indented under subclass 474. Subject matter wherein the output of a light source employed for scanning is varied in response to specific conditions in the system.

SEE OR SEARCH CLASS:
362, Illumination, appropriate subclass for illumination in general.

Transceiver:
This subclass is indented under subclass 474. Subject matter including structure wherein a portion of the scanning mechanism utilized in the generation of a picture signal may be utilized in the reception of the signal and recording of the picture.

SEE OR SEARCH THIS CLASS, SUBCLASS:
472 for a transceiver with a combined read and write head.

Nonlight:
This subclass is indented under subclass 474. Subject matter where the scanning is of a detectable parameter other than light.

Stylus type:
This subclass is indented under subclass 477. Subject matter including a stylus for making contact with the picture.

SEE OR SEARCH THIS CLASS, SUBCLASS:
424 for stylus synchronization.

Facsimile video:
This subclass is indented under subclass 474. Subject matter wherein a video camera scans documents or other static images.

SEE OR SEARCH THIS CLASS, SUBCLASS:
909 for an electronic still camera or scene reproducer.

Coherent light:
This subclass is indented under subclass 474. Subject matter having a laser light source.

SEE OR SEARCH CLASS:
359, Optics: Systems (Including Communication) and Elements, 196 and 237+, for modulation and scanning systems for laser beams.

Including a polygon reflector:
This subclass is indented under subclass 480. Subject matter wherein light is reflected from a rotating reflector having a polygonal cross section during scanning.

Solid-state:
This subclass is indented under subclass 474. Subject matter having a semiconductor device.

SEE OR SEARCH CLASS:
348, Television, 272 and 294+ for solid-state image sensors in television cameras.

Charge coupled device:
This subclass is indented under subclass 482. Subject matter including an array of charge storage elements on semiconductor base to which a variation in a electric charge field is applied to serially transfer charge through successive adjacent charge storage elements to an output terminal.

SEE OR SEARCH CLASS:
257, Active Solid-State Devices (e.g., Transistors, Solid-State Diodes), 215 for charge transfer type active semiconductor devices, per se.
348, Television, 282 and 311+ for charge-coupled devices in television cameras.

Fiber optics or optical waveguides:
This subclass is indented under subclass 474. Subject matter having transparent fibers, each longer than its diameter, so that they are capable of guiding light.

SEE OR SEARCH THIS CLASS, SUBCLASS:
901 for fiber optics in pictorial communications in general.

SEE OR SEARCH CLASS:
250, Radiant Energy, subclass 227 for photocells with optical or prephotocell systems including light conducting rods, E. G., optical fibers or waveguides.
359, Optics: Systems (Including Communication) and Elements, subclass 151, 173, 179, 188, and 195 for fibers optic communication.
385, Optical Waveguides, for optical waveguides, per se.

Cathode-ray tube:
This subclass is indented under subclass 474. Subject matter having a vacuum tube which focuses an electron beam on a luminescent screen.

Scan rate or document movement variation in accordance with data presence:
This subclass is indented under subclass 474. Subject matter wherein the speed with the picture is scanned or moved through the scanning station is related to or dependent on the presence of data or the amount of data present.

SEE OR SEARCH THIS CLASS, SUBCLASS:
137 for scan rate variation systems in television systems.

Facsimile transparency image scanning:
This subclass is indented under subclass 474. Subject matter wherein the document is in the form of a transparent sheet.

Document position detection:
This subclass is indented under subclass 474. Subject matter wherein the position of a document relative to a platen or scanning apparatus is detected.

SEE OR SEARCH THIS CLASS, SUBCLASS:
449 for document size detection.

Helical scanning pattern:
This subclass is indented under subclass 474. Subject matter wherein the surface assumes a cylindrical shape and the scanning mechanism describes a helical pattern about the surface as the scanning proceeds.

SEE OR SEARCH CLASS:
346, Recorders, subclass 138 for drum recorders.

Transparent drum:
This subclass is indented under subclass 489. Subject matter wherein the cylindrical shaped surface is light transmissive.

Internal scan:
This subclass is indented under subclass 490. Subject matter wherein the scanning is performed from within the cylindrical shaped surface.

Specified sheet clamp:
This subclass is indented under subclass 489. Subject matter including apparatus to maintain a scanned document in contact with the cylindrical shaped surface.

Curved scanning surface:
This subclass is indented under subclass 474. Subject matter wherein the surface assumes as arcuate shape and the scanning mechanism follows the arcuate shape.

Linear scanning pattern:
This subclass is indented under subclass 474. Subject matter wherein the surface is traversed a series of straight lines.
(1) Note. Included in this subclass are scanning mechanisms wherein the surface may be cylindrical or curved, but the scanning is performed in a straight line parallel to the axis the cylinder or curved surface.

SEE OR SEARCH CLASS:
346, Recorders, subclass 139 for marking devices wherein a marker moves in a straight line.
347, Incremental Printing of Symbolic Information, 223 for plural beam scanning apparatus and method, particularly subclass 238 for marking a scanned medium using light emitting diodes, and subclasses 129+ for generic electric markers where an electrostatic image is formed on a medium or discharged from a medium by scanning the medium with beam of light emitted from a light source, particularly subclass 130 for such an apparatus using light emitting diodes as the light source.

Spiral or helix aperture with linear aperture:
This subclass is indented under subclass 494. Subject matter wherein there are two surfaces between a source of light and a light responsive element, one surface having a linear aperture and the other surface having a helical aperture where the two apertures move relative to each other.

Document moves during scanning:
This subclass is indented under subclass 494. Subject matter wherein a document moves while being scanned.

Scanning element moves relative to a flat stationary document:
This subclass is indented under subclass 494. Subject matter wherein a scanning apparatus moves relative to a document being scanned.

Document feed:
This subclass is indented under subclass 474. Subject matter having a device to move sheets to be scanned to or from the scanner.

NATURAL COLOR FACSIMILE:
This subclass is indented under the class definition. Subject matter including generating, transmitting, recording, reproducing, or displaying a picture representative signal which includes portions indicating the existing color of an original object, in which the local light variation composing the picture is not subject to variation with time.
(1) Note. An original object may include a scene, an image, or a document which does not vary with time.

SEE OR SEARCH CLASS:
380, Cryptography, subclasses 243-246 for secret facsimile equipment.

Image reproduction:
This subclass is indented under subclass 500. Subject matter wherein an image is converted to an electrical signal and then converted into another image without transmission of the signal to a remote location.

SEE OR SEARCH THIS CLASS, SUBCLASS:
401 for image reproduction system in black and white facsimile.

Ink-Jet:
This subclass is indented under subclass 501. Subject matter wherein an image is formed on a recording sheet by means of nozzles which eject ink drops onto the sheet.

SEE OR SEARCH CLASS:
347, Incremental Printing of Symbolic Information, see 1 for selective marking by ink jet.

Thermal:
This subclass is indented under subclass 501. Subject matter wherein an image is formed on a recording sheet by means of a heating element which thermally fixes ink onto the sheet.

Measuring, testing, and calibrating:
This subclass is indented under subclass 500. Subject matter wherein a color facsimile device is monitored, measured, tested, or calibrated.
(1) Note. Examples found herein are: Densities of neutral color patches and an image signal.

SEE OR SEARCH THIS CLASS, SUBCLASS:
404 for black and white facsimile memory monitoring.
405 for black and white image transmission accuracy verification.
406 for black and white facsimile measuring and testing.

Scanning:
This subclass is indented under subclass 500. Subject matter including means traversing a surface to derive information from an image or to reproduce an image.

SEE OR SEARCH THIS CLASS, SUBCLASS:
474 for scanning devices in black and white facsimile.

Transparency image scanning:
This subclass is indented under subclass 505. Subject matter wherein the original object to be scanned is a film or transparent sheet.

Cathode-ray tube:
This subclass is indented under subclass 505. Subject matter wherein an image appearing on a space discharge display is scanned and reproduced.

Transceiver:
This subclass is indented under subclass 505. Subject matter having both a signal transmitter and a signal receiver at a common geos:graphic location for transmission and reception of separate signals.

SEE OR SEARCH CLASS:
379, Telephonic Communications, 100.01 for facsimile combined with a telephone system.
455, Telecommunications, 73 for radio transceivers.

Illumination:
This subclass is indented under subclass 505. Subject matter including specific characteristics or details of a light source used in scanning an original image or object.

SEE OR SEARCH CLASS:
362, Illumination, 3 for photos:graphic lighting.

Coherent light:
This subclass is indented under subclass 509. Subject matter including a laser light source.

With prism:
This subclass is indented under subclass 505. Subject matter wherein a prism is used to separate a reflected light into a plurality of colored lights.
(1) Note. A prism may be a birefringent element which is formed into a structure bound in part by two plane faces that are not parallel.

SEE OR SEARCH CLASS:
359, Optics: Systems (Including Communication) and Elements, 831 for prism, per se.

With color filters:
This subclass is indented under subclass 505. Subject matter wherein filters of different colors convert a light reflected from an original color into light rays of different colors.

Solid-state:
This subclass is indented under subclass 505. Subject matter wherein a scanning element is a semiconductor device.

SEE OR SEARCH THIS CLASS, SUBCLASS:
213.11 for scanned solid-state devices in television picture signal generators.
482 for solid-state in black and white facsimile.

With plural sensors:
This subclass is indented under subclass 513. Subject matter wherein the semiconductor device includes a plurality of reading elements for converting an image into color image signals.

Color separation:
This subclass is indented under subclass 500. Subject matter
wherein a color image signal is decomposed into a plurality of color signals corresponding to each of a plurality of primary colors (e.g., red, blue, and green) before processing.

SEE OR SEARCH THIS CLASS, SUBCLASS:
518 for color correction in natural color facsimile.

White balance correction:
This subclass is indented under subclass 515. Subject matter wherein a gain of the primary color signals is adjusted to a proper level by using amplifiers.

Color masking:
This subclass is indented under subclass 515. Subject matter wherein selected portions of an original color image are covered with a layer of opaque material so as to be eliminated from the color separated image.

Color correction:
This subclass is indented under subclass 500. Subject matter including means for modifying signals representative of various colors in a picture to ultimately reproduce a color picture that is a true representation of the original picture.

SEE OR SEARCH THIS CLASS, SUBCLASS:
515 for color separation in natural color facsimile.

Gamma correction:
This subclass is indented under subclass 518. Subject matter for correcting a nonlinear input to output characteristics of a color image facsimile system.

SEE OR SEARCH THIS CLASS, SUBCLASS:
400 for black and white facsimile.

Hue, saturation and luminance:
This subclass is indented under subclass 518. Subject matter wherein the color correction is modified by (a) changing the dimension of color that refers to a scale of perception ranging from red through yellow, green and blue, and circulates back to red; (b) a pure color; (i.e., one not mixed with white light;) or (c) a photometric quantity of light radiation.

Gradation:
This subclass is indented under subclass 518. Subject matter for controlling an optical color density of an image.

With histogram:
This subclass is indented under subclass 518. Subject matter including means for generating a s:graphical representation of a frequency distribution of color densities.

This subclass is indented under subclass 518. With memory for storage of conversion data: Subject matter including means for retaining color conversion data to be used in processing a color image.

SEE OR SEARCH CLASS:
365, Static Information Storage and Retrieval, for static memory devices, per se.

Intermediate storage:
This subclass is indented under subclass 500. Subject matter including means for storage of signals prior to reproduction of the picture.

SEE OR SEARCH CLASS:
318, Electricity: Motive Power Systems, 567 and classes indicated in the search notes under the class definition for program or pattern controlled devices.

Interpolation:
This subclass is indented under subclass 500. Subject matter including a determination or estimation of a value of a picture signal between two known values or of a trend established between two or more known values of a picture signal.

SEE OR SEARCH CLASS:
708, Electrical Computers: Arithmetic Processing and Calculating, subclass 290 and 847 for interpolation in data processing.

With mark-forming function:
This subclass is indented under subclass 500. Subject matter wherein reference marks are formed at predetermined positions of an image forming medium so as to provide alignment of color separated image reproductions.

Color photography previewer:
This subclass is indented under subclass 500. Subject matter including means for adjusting a quality or characteristics of a displayed picture and providing an indication of various parameters necessary to photos:graphically reproduce an image of the displayed picture.

Size variation:
This subclass is indented under subclass 500. Subject matter for providing a reproduction of a size different from the original object size.

Black signal synthesis:
This subclass is indented under subclass 500. Subject matter for deriving a signal obtained from a black color of high density in a printout image.

Specific image-processing circuitry:
This subclass is indented under subclass 500. Subject matter including details of circuitry for processing an image signal in some manner to either change or improve the image for reproduction.

SEE OR SEARCH THIS CLASS, SUBCLASS:
160 for specific processing circuitry of television in general.
443 for specific signal processing circuitry in black and white facsimile, in general.

Electronic retouch:
This subclass is indented under subclass 530. Subject matter including electronic means for improving or changing a color image by adding details to or removing flaws that exist in the original object.

Sharpness emphasizing:
This subclass is indented under subclass 530. Subject matter including means for enhancing contrast edges to improve detail in a color image.

Moire reduction:
This subclass is indented under subclass 530. Subject matter including means for reducing the occurrence of a convergence of lines in color scanners.

Halftone processing:
This subclass is indented under subclass 530. Subject matter wherein shades of various darkness between the darkest and lightest elements of the original object are represented by a pattern of dots of varying density in the image.

SEE OR SEARCH THIS CLASS, SUBCLASS:
456 for halftone or grey level processing in black and white facsimile.

Matrix:
This subclass is indented under subclass 534. Subject matter wherein an image signal has one or more reference levels which are successively varied.

SEE OR SEARCH THIS CLASS, SUBCLASS:
30 for matrixing or mixing in natural color television.

SEE OR SEARCH CLASS:
428, Stock Material or Miscellaneous Articles, subclass 908 for a print matrix.

Halftone screening:
This subclass is indented under subclass 534. Subject matter wherein a halftone reproduction of an original is reproduced on a recording medium by means of a recording element using screens formed of periodically repeated, adjacent screen grid elements.

Image editing:
This subclass is indented under subclass 530. Subject matter wherein a specific image signal is edited by an operator before reproduction or transmission.

SEE OR SEARCH THIS CLASS, SUBCLASS:
448 for image processing in black and white facsimile.

Image portion selection:
This subclass is indented under subclass 530. Subject matter wherein a portion of an entire image is selected for specific processing.

Image coding (encoder/decoder):
This subclass is indented under subclass 530. Subject matter including means for converting image analog signals into digital information or vice versa.

SEE OR SEARCH THIS CLASS, SUBCLASS:
467 for image classification and coding in black and white facsimile.

SEE OR SEARCH CLASS:
341, Coded Data Generation or Conversion, for analog to digital conversion, in general.

Composite image:
This subclass is indented under subclass 530. Subject matter wherein a plurality of image signals are combined to form a signal representing a single image.

The following subclasses are collections of cross-references of published disclosures pertaining to various specified aspects of the television art which aspects do not form
appropriate bases for subclasses in the foregoing classification (i.e., subclasses superior hereto in the schedule). These subclasses assist a search based on remote function of the apparatus and may be of further assistance to the searcher as a starting point in further related fields of search either inside or outside the class. Thus, there is here provided second access for retrieval of a limited number of types of disclosures.
(1) Note. Disclosures are placed in these subclasses for their value as references and as leads to appropriate main or secondary fields of search without regard to their original classification.
(2) Note. The disclosures cross-referenced into the following subclasses are examples only of the indicated subject matter, and in no instance do they represent the entire extent of the prior art.

FIBER OPTICS:
Art collection of fiber optics utilized with or as components of facsimile systems.

SEE OR SEARCH CLASS:
250, Radiant Energy, 227.11 for light rods utilized in optical or prephotocell systems.
355, Photocopying, subclass 1 for fiber optics utilized in photocopying devices.
359, Optics: Systems (Including Communication) and Elements, 109 for optical communication systems which may utilize fiber optics.
385, Optical Waveguides, appropriate subclasses for fiber optic in general.

HANDHELD CAMERA WITH RECORDER IN A SINGLE UNIT:
Subject matter where there is a portable television camera and a television signal recorder combined into a single unit.
(1) Note. The recorder may be mounted on a camera operator's belt and attached to the camera by a cable.

TRACK SKIPPERS (I.E., "GROOVE SKIPPERS"):
Subject matter having a record medium on which is recorded a television signal in a series of tracks or grooves and a transducer for reading the recorded television signal, wherein the transducer is caused to jump over or skip one or more recorded grooves or tracks.

PAUSE CONTROL (I.E., "COMMERCIAL KILLERS"):
Subject matter where a recording operation is automatically interrupted in response to a detected characteristic of a television signal being recorded.

ELECTRONIC STILL CAMERA OR SCENE REPRODUCER:
Art collection of electronic photography subsystem to generate and store, or to retrieve and display an electrical signal indicative of a substantially instantaneous color or monochromatic image of a scene, or a component peculiar thereto.
(1) Note. The storage and retrieval is exclusively dynamic recording or reproduction, the static storage is dealt with in Class 348, Television, subclasses 231+ and 714+.
(2) Note. Included in this art collection is the reproduction of the scene on photos:graphic media or by printing.