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Method and device for the generation of a scalable data stream and method and device for decoding a scalable data stream

  • US 20040049376A1
  • Filed: 06/10/2003
  • Published: 03/11/2004
  • Est. Priority Date: 01/18/2001
  • Status: Active Grant
First Claim
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1. A method of producing a scalable data stream of at least two blocks of output data of a first coder and at least one block of output data of a second coder, wherein the at least two blocks of output data of the first coder together represent a number of sample values of the input signal for the first coder which form a current section of the input signal for the first coder, and wherein the at least one block of output data of the second coder represents a number of sample values of the input signal for the second coder, wherein the number of sample values for the second coder forms a current section of the input signal for the second coder, wherein the number of sample values for the first coder and the number of sample values for the second coder is the same, and wherein the current sections for the first and the second coder are identical or shifted compared to each other by a duration, the method comprising the following steps:

  • writing a determination data block for the current section of the input signal for the first or the second coder;

    writing a block of output data of the second coder, in the direction of transfer from a coding device to a decoding device, after the determination data block;

    writing at least one block of output data of the first coder, in the direction of transfer, in front of the determination data block; and

    writing offset information into the scalable data stream, indicating that the at least one block of output data of the first coder, in the direction of transfer, is in front of the determination data block.

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