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BITSTREAM SYNTAX FOR MULTI-PROCESS AUDIO DECODING

  • US 20090006103A1
  • Filed: 06/29/2007
  • Published: 01/01/2009
  • Est. Priority Date: 06/29/2007
  • Status: Active Grant
First Claim
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1. A method of decoding a compressed audio bitstream containing syntax elements conforming to a bitstream syntax, the bitstream syntax being partitioned in tiles and defining a base coding layer for coding a base band spectrum region of audio content and optional coding layers comprising a base plus coding layer, a base peak coding layer, a frequency extension coding layer and a channel extension coding layer, the method comprising:

  • reading the compressed audio bitstream in tiles;

    decoding a base coding layer of the tiles;

    parsing a first syntax element from a header portion of the tile signals presence of a superframe header;

    upon reaching a tile in which the first syntax element signals a superframe header, decoding configuration parameters signaling which of the optional coding layers are present;

    decoding any optional coding layers signaled to be present;

    reconstructing an output audio signal from the decoded coding layers; and

    playing the output audio signal.

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