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Process for controlling an MPEG decoder

  • US 5,774,206 A
  • Filed: 12/19/1996
  • Issued: 06/30/1998
  • Est. Priority Date: 05/10/1995
  • Status: Expired due to Term
First Claim
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1. A process for decoding MPEG encoded image data stored in a system memory utilizing a configurable image decoding apparatus, said process comprising the steps of:

  • (a) establishing in the system memory a series of buffers, including a display buffer, a reference buffer and a strip buffer;

    (b) extracting macroblock information from said MPEG encoded image data, the macroblocks containing image data and motion compensation data;

    (c) extracting a series of parameters from the MPEG encoded image data for decoding the MPEG encoded data;

    (d) determining quantization factors from the encoded image data;

    (e) configuring the configurable image decoding apparatus, including(i) configuring a means for parsing the macroblock data into motion vectors and image data with the series of parameters for decoding the encoded data;

    (ii) configuring a means for performing inverse quantization with the quantization coefficients;

    (f) determining a decoding order of the extracted macroblock information to be decoded;

    (g) providing said extracted macroblock information to the parsing means in the decoding order;

    (h) combining decoded image data with motion vectors extracted by the parsing means; and

    (i) storing the combined data in the system memory.

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