Video encoder and decoder using region based coding and decoding techniques with sequential refresh
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United States of America Patent
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Apr 23, 2013
Grant Date -
Jul 8, 2010
app pub date -
Mar 12, 2010
filing date -
Sep 18, 2007
priority date (Note) -
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Abstract
A video encoder that encodes each of a plurality of blocks obtained by dividing an input image, includes: a definition unit configured to define a valid area which is allowed to be used as reference in a reference image in interframe coding; a detection unit configured to detect a reference area in the reference image for a target block; a predicted image generation unit configured to generate a predicted image by outputting an image of the reference area for the reference area belonging to the valid area and outputting a complementary image for the reference area not belonging to the valid area; and a coding unit configured to encode the input image using the predicted image, wherein valid area information indicating the valid area is transmitted to a video decoder, for each group of a plurality of blocks.
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