Television – Two-way video and voice communication – User positioning
Patent
1993-05-04
1994-09-06
Chan, Wing F.
Television
Two-way video and voice communication
User positioning
379102, H04M 1100, H04N 712
Patent
active
053452585
ABSTRACT:
A videophone at e.g., a called location, receives sound signals, video signals and control signals through a communication circuit from a communication line and originating at, e.g., a calling videophone. A start signal detecting means, within the called videophone detects a storage start requesting signal from received control signals originating at a calling videophone. At the time of such detection, a coding circuit within the called videophone again encodes the video signals, that are received by the communication circuit and continuously decoded by a decoding circuit, and transmitted by the calling videophone but only by one frame therefrom and stores the frame into a storage circuit. After storing the one frame, a change-over circuit in the called videophone switches to the storage circuit to continuously store the subsequent incoming coded video and sound signals for eventual playback.
REFERENCES:
patent: 4979028 (1990-12-01), Minematsu et al.
patent: 5136628 (1992-08-01), Araki et al.
"International Standards of Video Conference System", Communication Technology, Dec. 1990, pp. 35-42.
"Draft Revision of Recommendation H.261", International Telegraph and Telephone Consultive Committer (CCTTT), Aug. 21, 1990, pp. 1-25.
"User-User Information Transferring Procedure Excerpt from Technical Reference Materials, Interface of INSNET Service", Nippon Telephone and Telegraph Co., Ltd., Apr. 4, 1988, pp. 449-451.
Kato Seiji
Matsubara Atsushi
Saito Yoshinori
Yamakita Yoshinobu
Chan Wing F.
Michaelson Peter L.
Sanyo Electric Co., Inc.
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