Differential data coding and decoding process and system...

Details Differential data coding and decoding process and system... Differential data coding and decoding process and system...

H - Electricity

03

M

354/68

H03M 13/00 (2006.01) G06T 9/00 (2006.01) H03M 7/36 (2006.01) H04B 14/06 (2006.01) H04N 7/34 (2006.01)

Patent

CA 1227574

ABSTRACT OF DISCLOSURE A differential coding-decoding system, in which the coder comprises a forecaster delivering, on the basis of a reconstructed value corresponding to a coded quantity, a forecaster P for the following quantity X to be coded, a forecast error quantizer delivering the difference d = X - P, and a forecast quantizer, the outputs of which are connected to a code allocator, the allocated code word transmitted for a quantity X to be coded being related,first to the forecast error quantization level Ei formulated by the forecast error quantizer, and, second, to the quantized forecast Pj formulated by the forecast quantizer; the codes allocated to successive forecast error zones corresponding to forecasts Pj are always assigned in the same order, when j varies from minimum to maximum forecast error zones.

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