Method of coding video signals
Patent 4894713 Issued on January 16, 1990. Estimated Expiration Date: 
June 1, 2008. 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.
June 1, 2008. 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 ReferencesTriangle and pyramid signal transforms and apparatus Video bandwidth reduction system employing interframe block differencing and transform domain coding Adaptive process for the coding and decoding of a sequence of pictures by transformation and devices for performing this process Priority coding of transform coefficients Patent #: 4751742 InventorsAssigneeApplicationNo. 200933 filed on 06/01/1988US Classes:375/240.2, Discrete cosine708/400TransformExaminersPrimary: Britton, Howard W.Attorney, Agent or FirmForeign Patent References
International ClassesH04N 007/133H04N 007/137 Foreign Application Priority Data1987-06-05 BEAbstractIn a method in which the data related to the image are read in successive blocks, then subjected to orthogonal transformation, the coefficients of the transform obtained being quantized and analyzed according to a certain order and applied in the form of binary signals to a redundancy reducing coder, the signals representing the coefficients of the transform are stored in a memory organized in several blocks, and the contents of said memory are analyzed such that the signals applied to the redundancy reducing coder comprise sets of signals of coefficients taken from a group of blocks, the signals of each coefficient in each set being taken from a separate block belonging to said group of blocks.Other References
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