| 摘要 |
A shape coding method of coding an object shape signal indicating a prescribed object shape in an image display signal, includes coding the object shape signal for each unit region of a prescribed size on a display screen to generate a coded shape bit stream, and decoding a signal which is in the middle of the coding to generate a locally decoded shape signal; analyzing the locally decoded shape signal for each unit region, and deciding at least one of a type of shape post-processing of the locally decoded shape signal for making an object shape obtained from the locally decoded shape signal smooth and whether to perform the shape post-processing to the locally decoded shape signal, in accordance with an analysis result; and outputting one of the locally decoded shape signal to which prescribed shape post-processing has been performed and the locally decoded shape signal to which the shape post-processing has not been performed, as a coding shape signal for use in coding a signal other than the object shape signal in the image display signal.
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