Television – Two-way video and voice communication – User positioning
Patent
1995-10-24
1999-05-25
Grant, Christopher C.
Television
Two-way video and voice communication
User positioning
348 17, 348515, 395 244, 395279, H04N 714
Patent
active
059073519
ABSTRACT:
A method and apparatus for transmitting and remotely displaying the audio and visual portion of a person speaking so that the audio and visual signals are synchronized. The audio signal is constantly transmitted to the receiver and is also used to create a predicted image of the lips of the talking head. The actual lip image is compared to the predicted lip image. Based upon this comparison, it is determined which of three signals is to be transmitted to the receiver: no signal corresponding to the video signal, a signal corresponding only to the differences between the actual lip image and a predicted lip image, or the actual lip image. The receiver reconstructs a lip image based upon the audio signal received and the signal received, if any, corresponding to the video image and inserts it into the previously received video frame or modifies the previous frame accordingly.
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Chen Tsuhan
Rao Ram R.
Grant Christopher C.
Lucent Technologies - Inc.
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