Buffer controlled picture signal encoding and decoding system

Details Buffer controlled picture signal encoding and decoding system Buffer controlled picture signal encoding and decoding system

1989-10-04

1990-09-04

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358431, 358136, H04N 712

Patent

active

049548921

ABSTRACT:
A picture signal encoding and decoding apparatus which transmits a digital picture signal by encoding, and receives and decodes an incoming encoded signal comprises a configuration in which a condition not to make a receiving buffer overflow can be controlled on the transmitting side, and a plurality of quantizers are prepared and a proper quantizing characteristic is selected and used according to the sequence of transformed coefficients and the size of a motion vector. Therefore, it is not necessary to prepare a receiving buffer of a large capacity or a high speed decoding circuit, so that the apparatus can be manufactured at a low cost and the stability of operation is improved and also a signal can be compressed efficiently owing to the realization of quantization corresponding to a statistical characteristic of an input signal.

REFERENCES:
patent: 4131915 (1978-12-01), Nagakame et al.
patent: 4270148 (1981-05-01), Adachi
patent: 4386373 (1983-05-01), Kondo et al.
patent: 4586088 (1986-04-01), Kondo

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