| US 7,499,416 B2 | ||
| Video teleconferencing system with digital transcoding | ||
| Mark D. Polomski, Nashua, N.H. (US) | ||
| Assigned to Tandberg Telecom AS, Lysaker (Norway) | ||
| Filed on Apr. 29, 2003, as Appl. No. 10/426,245. | ||
| Application 10/426245 is a continuation of application No. 09/343614, filed on Jun. 30, 1999, granted, now 6,584,077. | ||
| Application 09/343614 is a continuation of application No. 09/118544, filed on Jul. 17, 1998, abandoned. | ||
| Application 09/118544 is a continuation of application No. 08/896554, filed on Jul. 17, 1997, granted, now 5,838,664. | ||
| Application 08/896554 is a continuation of application No. PCT/US96/00450, filed on Jan. 16, 1996. | ||
| Prior Publication US 2003/0231600 A1, Dec. 18, 2003 | ||
| Int. Cl. H04J 3/04 (2006.01); H04J 3/16 (2006.01); H04L 12/16 (2006.01); H04L 12/56 (2006.01) | ||
| U.S. Cl. 370—263 [370/402; 370/465; 370/535; 348/14.08] | 48 Claims |
| 1. A method of operating a conference, comprising:
receiving a first input signal from a first audiovisual terminal, the first input signal including first compressed video
data;
receiving a second input signal from a second audiovisual terminal, the second input signal including second compressed video
data;
decompressing the first compressed video data and thereby generating first decompressed digital data;
decompressing the second compressed video data and thereby generating second decompressed digital data;
outputting at least some of the first decompressed digital data to a bus during a first plurality of timeslots;
outputting at least some of the second decompressed digital data to the bus during a second plurality of timeslots;
reading at least some of the first decompressed digital data from the bus during the first plurality of timeslots;
reading at least some of the second decompressed digital data from the bus during the second plurality of timeslots;
combining at least some of the first and second decompressed digital data read from the bus to form third decompressed data
representative of a first composite image;
compressing at least some of the third decompressed data and thereby forming third compressed data;
using at least some of the third compressed data to generate a first output signal; sending the first output signal to a third
audiovisual terminal.
|