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Vector quantizer and vector quantization method

  • US 6,278,385 B1
  • Filed: 01/31/2000
  • Issued: 08/21/2001
  • Est. Priority Date: 02/01/1999
  • Status: Expired due to Fees
First Claim
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1. A vector quantizer for performing vector quantization on input signal data, comprising:

  • a waveform extracting device that performs waveform extraction on said input signal data to output extracted waveform data; and

    an index generating device that generates index data based on the output extracted waveform data;

    wherein as index data to be generated based on predetermined extracted waveform data in which no watermark information is to be embedded, out of the output extracted waveform data, said index generating device randomly selects index data corresponding to the predetermined extracted waveform data from a plurality of index data which, when decoded, have amounts of errors falling within a predetermined range with respect to the predetermined extracted waveform data before decoding.

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