Coder-decoder for transmission and/or reception of television pi

Details Coder-decoder for transmission and/or reception of television pi Coder-decoder for transmission and/or reception of television pi

1984-09-20

1987-04-21

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358135, H04N 7133

Patent

active

046600787

ABSTRACT:
Coder-decoder of television pictures for transmission and/or reception via digital low-speed channel. In transmission, it first carries out the bidimensional transform of digital sample blocks of the television signal and then a dichotomic quantization thus obtaining quantized coefficients with variable length as a function of the coefficient index; in reception, it first carries out a quantization for quantized coefficients re-assignment of suitable quantization levels, and then the bidimensional antitransform for obtaining again the digital television signal samples. An optimized configuration of digital sample memory in transmission and in reception is shown in FIG. 1.

REFERENCES:
patent: 4125873 (1978-11-01), Chesarek
patent: 4196448 (1980-04-01), Whitehouse
patent: 4375650 (1983-03-01), Tiemann
patent: 4386366 (1983-05-01), Mori

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