System and method for encoding a video sequence using spatial and temporal transforms
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United States of America Patent
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Feb 12, 2002
Grant Date -
Nov 15, 2001
app pub date -
May 7, 2001
filing date -
Jul 24, 1998
priority date (Note) -
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Abstract
A system and method for compressing a video data stream receives a sequence of video frames, each video frame containing an array of image data representing an image. A spatial transform module performs a spatial decomposition transform on the video frames to generate spatially transformed video frames. A temporal transform module performs a temporal decomposition transform on blocks of the spatially transformed video frames, each block containing a predefined number of the spatially transformed video frames in a sequence corresponding to the sequence of the corresponding video frames. The temporal transform module applies a temporal decomposition transform to at least one low spatial frequency subband of data in the spatially transformed video frames so as to generate temporally transformed video data. A data encoder encodes, for each block of video frames, the temporally transformed video data and the subbands of data, if any, to which the temporal decomposition transform was not applied.
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