04319267 is referenced by 54 patents and cites 2 patents.

A color picture is separated into three color component pictures, which are divided respectively by first, second and third block coding means into blocks and encoded. In the first block coding means, one of the color component pictures is encoded, for each block, into gray level codes representing gray level components in the block and a resolution code representing the distribution of the gray level codes in the block. In this case, when the gray level in the block undergoes a little change, an average gray level can be used as the gray level code and the resolution code can be omitted. The second and third block coding means may be identical in construction with the first block coding means. The resolution code of the block obtained by the first block coding means can also be employed in the coding of the corresponding blocks by the second and third block coding means. In the first block coding means, the size of the blocks into which the color component picture is divided is altered locally in accordance with the state of the color component picture. The block size thus changed in the first block coding means can also be used in the coding by the second and third block coding means.

Title
Picture coding and/or decoding equipment
Application Number
6/116713
Publication Number
4319267
Application Date
January 30, 1980
Publication Date
March 9, 1982
Inventor
Takahiko Kamae
Yokosuka
JP
Tomio Kishimoto
Yokosuka
JP
Katsumi Mori
Yokosuka
JP
Shinichi Murakami
Yokosuka
JP
Eiji Mitsuya
Yokohama
JP
Agent
Pollock Vande Sande & Priddy
Assignee
Nippon Telegraph and Telephone Public Corporation
JP
IPC
H04N 1/41
H04N 1/46
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