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Decoding device, decoding method, encoding device, encoding method, and program

  • US 9,437,198 B2
  • Filed: 06/24/2013
  • Issued: 09/06/2016
  • Est. Priority Date: 07/02/2012
  • Status: Active Grant
First Claim
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1. A decoding device comprising circuitry configured to:

  • decode audio data of a plurality of channels included in an encoded bit stream;

    read information indicating whether to use the audio data of a specific channel for downmixing and downmix information indicating any one of a plurality of downmixing methods from the encoded bit stream; and

    downmix the decoded audio data to the audio data of a first number of channels by using the information indicating whether to use the audio data of a specific channel for downmixing and further downmix the audio data of the first number of channels to the audio data of a second number of channels by using the downmixing method indicated by the downmix information, wherein each of the plurality of downmixing methods calculates the audio data for the second number of channels based on the audio data of the first number of channels in accordance with a different mathematical expression.

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