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Adaptive bit stream demultiplexing apparatus in a decoding system

  • US 5,521,918 A
  • Filed: 12/30/1994
  • Issued: 05/28/1996
  • Est. Priority Date: 01/18/1994
  • Status: Expired due to Term
First Claim
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1. An apparatus for adaptively demultiplexing an input bit stream for use in a decoding system having a decoder for decoding the input bit stream to produce a moving picture and its associated sound, the input bit stream representing a video data bit stream for the moving picture and an audio data bit stream for the sound, which comprises:

  • an input FIFO (First-In-First-Out) buffer module having a plurality of input FIFO buffer in series for temporarily storing the input bit stream;

    a video FIFO buffer module having a plurality of video FIFO buffers in series for temporarily storing the video data bit stream;

    an audio FIFO buffer module having a plurality of audio FIFO buffers in series for temporarily storing the audio data bit stream;

    means for determining the full or the empty state of each of the input FIFO buffers, the video FIFO buffers and the audio FIFO buffers to thereby produce a buffer status signal indicative of the full or the empty states of the FIFO buffers in the input, the video and the audio FIFO buffer modules;

    means, in response to the buffer status signal, for adaptively fetching the input bit stream from the input FIFO buffers that are in the full state; and

    means for demultiplexing the fetched bit stream to produce the video and the audio data bit streams and providing the video and the audio data bit streams to the video and the audio FIFO buffers that are in the empty state, respectively.

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