Process and system for the compression of the flow rate of data

Details Process and system for the compression of the flow rate of data Process and system for the compression of the flow rate of data

1983-06-16

1985-12-10

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358133, 358135, H04N 712

Patent

active

045583617

ABSTRACT:
Method and apparatus for compressing the flow rate of data transmitted between a television transmitter and a television receiver in which data to be transmitted is received at a differential coding device which includes a predictor, a quantizer, a transmitted data reconstruction device, and a code allocator. Pseudo-random data is added to the data to be transmitted in order to make the quantization levels of the quantizer fluctuate about a mean position. Upon reception, the received data is received at a differential decoding device which includes a code converter, a predictor, a transmitted data restoration device, and a digital filter. The received data is filtered to eliminate unwanted granular noise while retaining the image contours of the transmitted image.

REFERENCES:
patent: 4268861 (1981-05-01), Schreiber et al.

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