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Motion image encoding method and motion image decoding method

  • US 8,179,962 B2
  • Filed: 09/06/2005
  • Issued: 05/15/2012
  • Est. Priority Date: 09/08/2004
  • Status: Active Grant
First Claim
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1. A video coding method for coding an input picture on a block-by-block basis so as to generate a coded stream, said method comprising:

  • determining, using a processor, a notification method for notifying a transform block size to be used in an orthogonal transform of a current block;

    creating an adaptive block transform mode indicating the notification method;

    generating the coded stream; and

    adding the adaptive block transform mode to the coded stream;

    wherein said determining includes determining, as the notification method, either (i) an implicit mode in which the transform block size is determined based on information regarding the current block or (ii) an explicit mode in which a transform size flag indicating the transform block size is added to each predetermined unit of blocks, andwherein in the implicit mode, the transform block size is determined based on motion vectors of blocks adjacent to the current block.

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