H - Electricity – 04 – N
Patent
H - Electricity
04
N
350/33
H04N 7/12 (2006.01) G06T 9/00 (2006.01) H04N 7/32 (2006.01) H04N 7/36 (2006.01) H04N 11/02 (2006.01)
Patent
CA 1245339
-39- ABSTRACT OF THE DISCLOSURE The method and the system for bit-rate compression of digital data between a television trans- mitter and receiver employ at the transmitter a differential coding device comprising a code allocator coupled respectively to the outputs of predictors which deliver the spatial prediction errors of the contour areas or highly textured areas of the image, the spatial pre- diction errors of the uniform areas and the temporal prediction errors of the uniform and fixed areas. The code allocator is controlled by a selecting device which selects one output of the predictors for applying a prediction error value to the input of a coding structure of the code allocator in order to code each datum of a current point applied to the input of a predictor in three different fixed-length codes, depending on whether the current point is located in a contour area or highly textured area of the image or whether the current point is located in a fixed or moving uniform area.
477951
Catros Jean Y.
Mischler Denis
Goudreau Gage Dubuc
Thomson-Video Equipment
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