Adaptive block classification scheme for encoding video images
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United States of America Patent
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Sep 29, 1998
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app pub date -
Sep 29, 1995
filing date -
Sep 29, 1995
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Abstract
Blocks of video frames are classified for encoding, for example, as empty blocks, inter blocks, or Intra blocks. This block classification is based on (at least) one statistical measure for each block. The classification is based on a comparison of the statistical measure for each block to a threshold value, but the threshold value can change, for example, from block to block or from frame to frame. In a preferred embodiment, the threshold values change as quantization (Q) level changes. In embodiments in which more than one statistical measure is used for block classification of each block, the more than one corresponding threshold values change as Q level changes.
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