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Audio-encoding method and apparatus, audio-decoding method and apparatus, recoding medium thereof, and multimedia device employing same

  • US 9,858,934 B2
  • Filed: 03/06/2017
  • Issued: 01/02/2018
  • Est. Priority Date: 06/01/2011
  • Status: Active Grant
First Claim
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1. An audio decoding method comprising:

  • receiving a bitstream including a coded quantization differential index of an envelope of a sub-band in an audio spectrum; and

    lossless decoding a coded quantization differential index of a current sub-band, by referring one of a plurality of tables based on a context which is obtained from a decoded quantization differential index of a previous sub-band,wherein the one of the plurality of tables is selected by one among a plurality of groups which are determined by the context.

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