Apparatus and method for coding moving image
AssigneeNEC Corporation
InventorMichiko Fukuda
Life of this patent
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Abstract
A moving image coding apparatus has a blocking unit for dividing an image applied in units of frames into a plurality of blocks, a mode selection unit for selectively performing intra-frame coding for performing coding within the same frame, and inter-frame prediction coding for performing coding between frames, for each of the plurality of blocks, a self-image display unit for displaying the image, and a qualitative refresh map creation unit for creating a refresh map which sets a shorter refresh period for a block corresponding to a predetermined area on a display screen of the display means than the rest of the plurality of blocks. The mode selection unit performs the intra-frame coding at the refresh period set in the refresh map.
Claims8
A moving image coding apparatus comprising:
- blocking means for dividing an image applied in units of frames into a plurality of blocks;
- selecting means for selectively performing intra-frame coding for performing coding within the same frame, and inter-frame prediction coding for performing coding between frames, for each of the plurality of blocks;
- display means for displaying the image;
- and
- qualitative refresh map creating means for creating a refresh map which sets a shorter refresh period at which the intra-frame coding is performed at a constant frame period for a block corresponding to a predetermined area on a display screen of said display means than the rest of the plurality of blocks,
- said selecting means configured to perform the intra-frame coding at the refresh period set in said refresh map.
A moving image coding method comprising the steps of:
- dividing an image applied in units of frames into a plurality of blocks;
- displaying the image on a display screen;
- selectively performing intra-frame coding for performing coding within the same frame, and inter-frame prediction coding for performing coding between frames, for each of the plurality of blocks;
- creating a refresh map which sets a shorter refresh period at which the intra-frame coding is performed at a constant frame period for a block corresponding to a predetermined area on a display screen of said display means than the rest of blocks;
- and
- performing the intra-frame coding at the refresh period set in said refresh map.
Dependencies are inferred from the claim text.