Image compression device, image compression method, image decompression device, and image decompression method
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United States of America Patent
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Nov 1, 2016
Grant Date -
Jul 2, 2015
app pub date -
Oct 8, 2014
filing date -
Oct 8, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
An image compression device includes: a first encoder that encodes a target block included in a segment in a first encoding mode; a second encoder that encodes the target block in a second encoding mode using a fixed-length coding to obtain a second encoded data; a calculator that calculates an accumulated amount of the first encoded data of the blocks; a selector that selects an encoding mode to be used to encode the target block from among the first encoding mode and the second encoding mode; and a determiner that determines whether to encode encoding mode information according to a predetermined condition. The selector selects the second encoding mode if a sum of an accumulated amount and an amount of the second encoded data of all remaining blocks in a segment exceeds a target value.
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