Image analysis – Image compression or coding – Interframe coding
Patent
1998-12-04
2000-12-26
Couso, Jose L.
Image analysis
Image compression or coding
Interframe coding
G06K 936
Patent
active
061671576
ABSTRACT:
A device for decoding coded image data divided into a plurality of blocks so as to generate decoded image data by applying an inverse orthogonal transformation to each block of the plurality of blocks includes a quantization-information detecting unit detecting block-quantization-step-size information indicative of quantization step sizes used for the plurality of blocks. The device also includes a variable-gain-low-pass filter reducing high frequency components of the decoded image data in a predetermined proximity of borders of the plurality of blocks based on the block-quantization-step-size information, the high frequency components having frequencies higher than a predetermined frequency.
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Couso Jose L.
Victor Company of Japan Ltd.
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