Picture encoding and/or decoding method and apparatus

Details Picture encoding and/or decoding method and apparatus Picture encoding and/or decoding method and apparatus

1992-09-25

1995-12-12

Ro, Bentsu

Facsimile and static presentation processing

Facsimile

Reduced time or bandwidth for static image communication

358433, 348420, H04N 732

Patent

active

054755018

ABSTRACT:
A picture encoding and/or decoding system adaptively changes encoding manner in discrete cosine transformation or predictive coding for improving a picture quality of transmission picture. A variable length coding method is changed in accordance with the change between the discrete cosine transformation and predictive coding. When discrete cosine transforming, a combination of a zero run length and a pixel value is effected two dimensional variable length coding. When predictive coding, a combination of a zero run length and a difference value between pixel values is effected two dimensional variable length coding. When predictive coding, a predictive value of a block and a quantization width are transmitted.

REFERENCES:
patent: 4633312 (1986-12-01), Yasuda
patent: 4754336 (1988-06-01), Nishizawa
patent: 4953019 (1990-08-01), Skikakura et al.
patent: 4982285 (1991-01-01), Sugiyama
patent: 5040060 (1991-08-01), Owada et al.
patent: 5051840 (1991-09-01), Watanabe et al.
patent: 5103307 (1992-04-01), Sugiyama
patent: 5267037 (1993-11-01), Sugiyama
Signal Processing--Image Communication vol. 2, No. 2, Aug. 1990, Elsevier, Amsterdam, NL; pp. 221-239 CCITT Working Party XV/1 `Draft version of recommendation h261: video codec for audiovisual services at px64kbit/s`*section 3: `Source coder` on pp. 223-266* *figure 3*.
Le Techniques De L'Ingenieur--Partie E6600 Jun. 1986, Paris pp. 1-11 C. J. Richard `Compression du signal video`.

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