Encoding images using block-based macroblock-level statistics
Patent 5832234 Issued on November 3, 1998. Estimated Expiration Date: 
October 18, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
October 18, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMethod and apparatus for determining motion vectors for image sequences Method and apparatus for determining motion vectors for image sequences Method for compressing and decompressing images by subdividing pixel color distributions Patent #: 5585944 InventorsApplicationNo. 544468 filed on 10/18/1995US Classes:709/247, Compressing/decompressing375/240.11Subband codingExaminersPrimary: Trammell, James P.Assistant: Peeso, Thomas R. Attorney, Agent or FirmInternational ClassH04N 001/415AbstractBlock-level statistical measures are generated and then used to generate macroblock-level statistical measures, which are in turn used to determine how to encode the macroblocks of the image. In a preferred embodiment, a macroblock-level intra-SAD measure is generated by summing four block-level intra-SAD measures generated from the four blocks of the macroblock. The macroblock-level intra-SAD measure is then used to determine whether to encode the macroblock using intraframe encoding or interframe encoding. Basing macroblock-level statistics on block-level measures can provide a more accurate prediction as to how the macroblock would be encoded using intraframe encoding techniques. | |
