Manual of U.S. Patent Classification
as of June 30, 2000

Class
704
DATA PROCESSING: SPEECH SIGNAL PROCESSING, LINGUISTICS, LANGUAGE TRANSLATION, AND AUDIO COMPRESSION/DECOMPRESSION

Class definitions may be accessed by clicking on the class title, above.
Subclass definitions may be accessed by clicking on the subclass number, below.

Patents classified in a subclass may be accessed by clicking on the " " icon following the subclass number, below.

( please note that links to definitions and classified patents may not be available for some classes and subclasses )

For search strategies, please refer to the Classification Index Explanation of Data web page.

Subclass		Title
ClassTitle		===> DATA PROCESSING: SPEECH SIGNAL PROCESSING, LINGUISTICS, LANGUAGE TRANSLATION, AND AUDIO COMPRESSION/DECOMPRESSION
1		LINGUISTICS
2		. Translation machine
3		. . Having particular Input/Output device
4		. . Based on phrase, clause, or idiom
5		. . For partial translation
6		. . Punctuation
7		. . Storage or retrieval of data
8		. Multilingual or national language support
9		. Natural language
10		. Dictionary building, modification, or prioritization
200		SPEECH SIGNAL PROCESSING
201		. For storage or transmission
202		. . Neural network
203		. . Transformation
204		. . . Orthogonal functions
205		. . Frequency
206		. . . Specialized information
207		. . . . Pitch
208		. . . . . Voiced or unvoiced
209		. . . . Formant
210		. . . . Silence decision
211		. . Time
212		. . . Pulse code modulation (PCM)
213		. . . Zero crossing
214		. . . Voiced or unvoiced
215		. . . Silence decision
216		. . . Correlation function
217		. . . . Autocorrelation
218		. . . . Cross-correlation
219		. . Linear prediction
220		. . Analysis by synthesis
221		. . Pattern matching vocoders
222		. . . Vector quantization
223		. . . Excitation patterns
224		. . Normalizing
225		. . Gain control
226		. . Noise
227		. . . Pretransmission
228		. . . Post-transmission
229		. . Adaptive bit allocation
230		. . Quantization
231		. Recognition
232		. . Neural network
233		. . Detect speech in noise
234		. . Normalizing
235		. . Speech to image
236		. . Specialized equations or comparisons
237		. . . Correlation
238		. . . Distance
239		. . . Similarity
240		. . . Probability
241		. . . Dynamic time warping
242		. . . Viterbi trellis
243		. . Creating patterns for matching
244		. . . Update patterns
245		. . . Clustering
246		. . Voice recognition
247		. . . Preliminary matching
248		. . . Endpoint detection
249		. . . Subportions
250		. . . Specialized models
251		. . Word recognition
252		. . . Preliminary matching
253		. . . Endpoint detection
254		. . . Subportions
255		. . . Specialized models
256		. . . . Markov
257		. . . . Natural language
258		. Synthesis
259		. . Neural network
260		. . Image to speech
261		. . Vocal tract model
262		. . Linear prediction
263		. . Correlation
264		. . Excitation
265		. . Interpolation
266		. . Specialized model
267		. . Time element
268		. . Frequency element
269		. . Transformation
270		. Application
271		. . Handicap aid
272		. . Novelty item
273		. . Security system
274		. . Warning/alarm system
275		. . Speech controlled system
276		. . Pattern display
277		. . Translation
278		. . Sound editing
500		AUDIO SIGNAL BANDWIDTH COMPRESSION OR EXPANSION
501		. With content reduction encoding
502		. Delay line
503		AUDIO SIGNAL TIME COMPRESSION OR EXPANSION (E.G., RUN LENGTH CODING)
504		. With content reduction encoding

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Last Modified: 6 October 2000