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Patent US5864637 - Method and apparatus for improved video decompression by selective reduction ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA video system examines the transform domain content of various spatially related blocks in a compressed video bitstream to determine whether predetermined types of similarities exist between multiple blocks. When certain selected similarities are found, the video system spatially combines the blocks...http://www.google.com/patents/US5864637?utm_source=gb-gplus-sharePatent US5864637 - Method and apparatus for improved video decompression by selective reduction of spatial resolutionAdvanced Patent SearchPublication numberUS5864637 APublication typeGrantApplication numberUS 08/423,912Publication dateJan 26, 1999Filing dateApr 18, 1995Priority dateApr 18, 1995Fee statusPaidPublication number08423912, 423912, US 5864637 A, US 5864637A, US-A-5864637, US5864637 A, US5864637AInventorsYi Liu, Geoffrey S. Strongin, Michael R. TuckerOriginal AssigneeAdvanced Micro Devices, Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (31), Non-Patent Citations (20), Referenced by (26), Classifications (21), Legal Events (5) External Links: USPTO, USPTO Assignment, EspacenetMethod and apparatus for improved video decompression by selective reduction of spatial resolutionUS 5864637 AAbstract A video system examines the transform domain content of various spatially related blocks in a compressed video bitstream to determine whether predetermined types of similarities exist between multiple blocks. When certain selected similarities are found, the video system spatially combines the blocks in a predetermined manner. In some embodiments, DCT coefficients of a plurality of blocks are averaged to form one averaged block and the averaged block is inverse discrete cosine transformed. The averaged and IDCT transformed block is written to the display at the position of each of the averaged blocks. In some embodiments, a representative block of a plurality of DCT coefficient blocks is selected and inverse discrete cosine transformed. The selected and IDCT transformed block is written to the display at the position of each of the plurality of blocks.
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