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Method and system for reduction of quantization-induced block-discontinuities and general purpose audio codec

  • US 6,704,706 B2
  • Filed: 02/04/2002
  • Issued: 03/09/2004
  • Est. Priority Date: 05/27/1999
  • Status: Expired due to Term
First Claim
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1. A low-latency method for enabling reduction of quantization-induced block-discontinuities of continuous data formatted into a plurality of data blocks having boundaries, including:

  • forming an overlapping input data block by prepending a fraction of a previous input data block to a current input data block;

    performing a reversible transform on each overlapping input data block to yield energy concentration in the transform domain;

    quantizing each reversibly transformed block and generating quantization indices indicative of such quantization;

    inversely transforming each quantized transform-domain block into an overlapping reconstructed data block; and

    excluding data from regions near the boundary of each overlapping reconstructed data block and reconstructing an initial output data block from the remaining data of such overlapping reconstructed data block.

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