Picture encoding method and apparatus, picture decoding method and apparatus and furnishing medium
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United States of America Patent
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Aug 19, 2003
Grant Date -
Jun 12, 2003
app pub date -
Jun 24, 1999
filing date -
Jun 26, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The MPEG4 is expanded to permit the use of the 4:2:2 format and the 4:4:4 format. To this end, there is provided an encoder adapted for encoding a picture in terms of a macro-block made up of a block of luminance Y and a block of chrominance Cr, Cb. The encoder includes a VOP encoding unit 3 for encoding the picture as reading of a flag (cbpc) specifying the state of encoding of the chrominance block and a flag (cbpcb, cbpcr) specifying the state of encoding of the chrominance block associated with the types of the chrominance Cb, Cr is adaptively changed responsive to a flag (chroma_type) representing the chrominance format of the picture and to the flag (cbpc) specifying the state of encoding of the chrominance block.
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