High definition television arrangement including noise immunity means
High definition television coding arrangement with graceful degradation
Adaptive leak HDTV encoder
Adaptive non-linear quantizer Patent #: 5136377
ApplicationNo. 926079 filed on 08/05/1992
US Classes:375/240.15, Bidirectional375/240.25Specific decompression process
ExaminersPrimary: Chin, Tommy P.
Assistant: Tung, Bryan
Attorney, Agent or Firm
International ClassesH04N 007/137
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.