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Encoder-assisted frame loss concealment techniques for audio coding

  • US 8,620,644 B2
  • Filed: 05/10/2006
  • Issued: 12/31/2013
  • Est. Priority Date: 10/26/2005
  • Status: Expired due to Fees
First Claim
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1. A method of concealing a frame of an audio signal comprising:

  • receiving the frame at a decoder, the frame including frequency-domain data of the audio signal;

    the decoder detecting one or more errors in the frame and discarding the frequency-domain data as a result of detecting the errors;

    the decoder estimating magnitudes of replacement frequency-domain data for the frame based on frequency-domain data included in neighboring frames of the frame;

    the decoder estimating signs of the replacement frequency-domain data for the frame based on a subset of signs for the frame transmitted from an encoder as side-information of a neighboring frame of the frame; and

    the decoder combining the magnitude estimates and the sign estimates to estimate the replacement frequency-domain data for the frame.

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