Adaptive-block-length, adaptive-transforn, and adaptive-window transform coder, decoder, and encoder/decoder for high-quality audio
Remote confidence testing for computer-based conferencing system
Method and apparatus for audio and video synchronizing in MPEG playback systems Patent #: 5598352
ApplicationNo. 643185 filed on 05/03/1996
US Classes:375/240.01, Television or motion video signal375/240.26, Associated signal processing381/2, Broadcast or multiplex stereo704/504With content reduction encoding
ExaminersPrimary: Britton, Howard W.
Attorney, Agent or Firm
International ClassesH04N 007/36
AbstractDisclosed is a partitioning procedure for designing MPEG decoders, AC-3 decoders, and decoders for other audio/video standards. The procedure provides that some specified decoding functionality be implemented exclusively in the form of hardware and certain other specified decoding functionality be provided exclusively as firmware or software. A video decoder designed according to this procedure includes the following elements: (a) firmware or software for implementing, in conjunction with a CPU, video header processing functions; and (b) hardware for implementing preparsing assist, macroblock reconstruction, and video display control functions. An audio decoder designed according to this procedure includes the following elements: (a) firmware or software for implementing, in conjunction with a CPU, decoding fields containing parameters for processing the audio data; and (b) hardware for implementing matrixing and windowing functions on the audio data.