Truncation error correction for predictive coding/encoding

Details Truncation error correction for predictive coding/encoding Truncation error correction for predictive coding/encoding

H - Electricity

04

N

H04N 7/50 (2006.01) G06T 9/00 (2006.01) H04N 7/26 (2006.01) H04N 7/36 (2006.01)

Patent

CA 2099169

-9- TRUNCATION ERROR CORRECTION FOR PREDICTIVE CODING/ENCODING Abstract Apparatus for eliminating the truncation errors associated with a multiplicative leak factor employed in a predictive coding arrangement adds a temporally varying control signal that affects the leak factor multiplication output. Specifically, in one embodiment the leak factor multiplication output is modified by arbitrarily changing, or dithering, the level of the mean signal. In another embodiment, the leak factor multiplication output is modified by effectively dithering the leak factor itself. The latter is accomplished by adding the varying control signal prior to the truncated division which occurs in the leak factor multiplication process. FILE:gjkus009.cn

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