Image-signal decoding apparatus

Details Image-signal decoding apparatus Image-signal decoding apparatus

1993-04-29

1995-12-26

Chin, Tommy P.

Television

Bandwidth reduction system

Data rate reduction

348407, 348699, 348415, 348416, H04N 724, H04N 732

Patent

active

054792118

ABSTRACT:
An image-signal decoding apparatus decodes moving-picture data compressed by orthogonal transform, quantization, and variable-length coding for each block. A variable-length code decoding circuit decodes the compressed moving-picture data and outputs the decoded moving-picture data, a moving vector for each block, and block-type information. A distortion eliminator circuit eliminates block distortions from the moving-picture data decoded by the variable-length code decoding circuit. A judging circuit obtains a signal band for each block from the decoded moving-picture data and, based on the band and at least one of the moving vector for each block and the block-type information, changes the distortion elimination characteristics of the distortion eliminator circuit.

REFERENCES:
patent: 4825289 (1989-04-01), Ohta
patent: 5126841 (1992-06-01), Tanaka et al.
patent: 5146326 (1992-09-01), Hasegawa
patent: 5194950 (1993-03-01), Murakami et al.
patent: 5241387 (1993-08-01), Fujikawa et al.
patent: 5331415 (1994-07-01), Hamasaki et al.
patent: 5337088 (1994-08-01), Honjo

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