| 摘要 |
A method of compressing a picture sequence in which a first set of pictures in the sequence, and a second set of pictures interleaved with the first set of pictures in the sequence are identified, and in which the first set of pictures are coded to a high coding quality and the second set of pictures are coded to a quality determined by the remaining bitrate resources. Downstream the first set of pictures can be extracted to produce a separate high quality picture sequence. The compression coding is preferably MPEG based, and control of the coding quality may be achieved by varying quantizer weighting matrix values in a linear combination of a flat matrix and a default non-flat matrix. |
