Coder-decoder for transmission and/or reception of...

Details Coder-decoder for transmission and/or reception of... Coder-decoder for transmission and/or reception of...

H - Electricity

04

N

350/33

H04N 7/12 (2006.01) H04N 7/30 (2006.01)

Patent

CA 1210136

ABSTRACT A coder-decoder of television pictures for transmission and/or reception via digital low speed channel is dis- closed. In transmission, it first carries out the bi- dimensional transform of digital sample blocks of the television signal and then a dichotomic quantization, thereby obtaining quantized coefficients with variable length as a function of the coefficient index; in recep- tion, it first carries out a quantization for quantized coefficients, re-assignment of suitable quantization levels, and then the bidimensional antitransform for re- obtaining the digital television signal samples.

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