Method and system for data compression between a television...

Details Method and system for data compression between a television... Method and system for data compression between a television...

H - Electricity

04

N

350/33

H04N 7/32 (2006.01) G06T 9/00 (2006.01)

Patent

CA 1217555

-46- ABSTRACT OF THE DISCLOSURE The method and the system for compression of the flow of data between a television transmitter and a television receiver make provision at the transmitter for a differential coding system comprising a circuit for computation and propagation of coding costs with respect to visibility thresholds at which a coding error becomes apparent on the received image, coding being performed by utilizing at least two different quantization and/or prediction characteristics. A device connected to the differential coding system trans- mits to the receiver an indication relating to a change in characteristic instead of the data corresponding to the image point to be transmitted when the point is located within an image zone in which the change is necessary. A device is provided at the receiver for re- constructing the data corresponding to the non- transmitted point as a function of data of points already known to the receiver.

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