Television – Two-way video and voice communication – User positioning
Patent
1994-02-25
1996-01-02
Britton, Howard W.
Television
Two-way video and voice communication
User positioning
348385, 348398, H04N 724
Patent
active
054812976
ABSTRACT:
The described video communication system incorporates multiple window display. One or more video transmission nodes provide macroblocks of video data available in a plurality of resolution levels. The transmission node encodes the macroblocks and assigns macroblock identifiers (IDs) to each macroblock. A receiving node receives a plurality of video sequences from a plurality of transmission nodes through a communication network. The receiving node thereafter eliminates macroblocks of video data that will not be displayed, such as in the case of portions of video that are hidden or overlapped. A macroblock translator also transforms the macroblock ID to a new macroblock ID which reflects the macroblock's position on the display screen as dictated by the user's window configuration. A decoder thereafter decompresses the video data one macroblock at a time, and provides the decompressed macroblock to a frame buffer. The frame buffer provides the window configured video data to a display.
REFERENCES:
patent: 5235420 (1993-08-01), Gharvi
patent: 5260783 (1993-11-01), Dixit
Kandlur, Dilip D., "MMT System Architecture," High Bandwidth Applications, IBM T. J. Watson Research Center, Proceedings of the Second Packet Video Workshop, vol. 1, Dec. 9-10, 1992, pp. 1-9.
Santo, Brian, "IBM Videoconferencing For Less," Electronic Engineering, Nov. 9, 1992.
Information Technology--Generic Coding of Moving Pictures and Associated Audio, Recommendation H.262, ISO/IEC 13818-2, Nov. 1993, Seoul.
Cash Glenn L.
Civanlar Mehmet R.
Gaglianello Robert D.
Swicker Donald B.
AT&T Corp.
Britton Howard W.
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