Picture signal encoding system, picture signal decoding system a

Details Picture signal encoding system, picture signal decoding system a Picture signal encoding system, picture signal decoding system a

1996-09-27

1999-09-28

Britton, Howard

Television

Bandwidth reduction system

Data rate reduction

348414, 348417, 348418, 348422, 382243, H04N 728

Patent

active

059596724

ABSTRACT:
A picture signal encoding system capable of transmitting a motion picture at an extremely low rate while sufficiently controlling the occurrence of a retransmission mode and the occurrence of a picture freeze. The encoding system comprises an encoding control section, an attribute memory, an attribute prediction section and an area extraction and recognition processing section. For realizing the extremely low rate transmission, the encoder system integrally performs the alteration of the syntax, the substitute of the code word, the adaptive control for the prediction of the current frame encoding attribute based on the past encoding attribute and the attribute decision, the object area extraction based on the motion and a model, the area-separated quantization control, and the control of the necessary number of transformation coefficients according to the use mode, the transmission rate and the motion occurrence quantity. A protocol transformer is provided to match the current picture compression standard (H.261), so that the encoding system can be made with a simple arrangement.

REFERENCES:
patent: 5379355 (1995-01-01), Allen
patent: 5448652 (1995-09-01), Vaidyanathan
patent: 5467086 (1995-11-01), Jeong
Matsumura et al: "Error-Resilient Syntax for Very-Low Bitrate Video Coding", PCSJ 94; Oct. 17-19, 1994.
"Digital Codeless Picture Telephone Developed by BT Labs, UK", Nikkei Electronics, Nov. 23, 1992.

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