Video decoder using adaptive macroblock leak signals
Patent 5278647 Issued on January 11, 1994. Estimated Expiration Date: 
August 5, 2012. 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.
August 5, 2012. 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 ReferencesHigh definition television arrangement including noise immunity means High definition television coding arrangement with graceful degradation Adaptive leak HDTV encoder HDTV receiver Adaptive non-linear quantizer Patent #: 5136377 InventorsAssigneeApplicationNo. 926079 filed on 08/05/1992US Classes:375/240.15, Bidirectional375/240.25Specific decompression processExaminersPrimary: Chin, Tommy P.Assistant: Tung, Bryan Attorney, Agent or FirmInternational ClassesH04N 007/137H04N 007/133 H04N 007/13 AbstractA decoder for a modified and improved MPEG signal syntax includes a subtractor responsive to an input signal, a frame buffer responsive to the subtractor, a motion compensator responsive to the buffer and to applied motion vector signals, and a multiplier responsive to frame leak signals and to a modified prediction signal for developing an output signal applied to the subtractor. Furthermore, the decoder includes a processor responsive to the motion compensator and to applied adaptive macroblock leak signals for developing the modified prediction signal. The processor comprises a transform circuit responsive to the motion compensator, a gating template responsive to the transform circuit and the adaptive macroblock leak signals, and an inverse transform circuit responsive to the gating template. The transform circuit operates on 2×2 blocks of pixels to form 2×2 blocks of transform elements. The gating template is responsive to signals that specify a treatment for 2×2 blocks of transform elements.Other References
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