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Audio decoding device with soft decision error correction by bit interpolation

  • US 6,751,586 B1
  • Filed: 08/03/2000
  • Issued: 06/15/2004
  • Est. Priority Date: 08/05/1999
  • Status: Expired due to Fees
First Claim
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1. A audio decoding device comprising:

  • reception processing means for receiving a signal from a transmission line as a received signal;

    demodulation processing means for demodulating the received signal which is received by the reception processing means into coded data;

    soft decision information generating means for generating a soft decision information indicating a current situation of the transmission line, based on coded data which are demodulated by the demodulation processing means;

    error correction processing means for decoding the coded data to output a audio code and also outputting interpolation process information based on the coded data if it is decided that an uncorrectable error is added to the coded data which are demodulated by the demodulation processing means;

    audio decoding processing means for reading interpolation information in a preceding frame based on interpolation process information concerning to the audio code, then applying an interpolation process to the audio code in unit of bit based on interpolation information and soft decision information, and then generating audio data by decoding the audio code which is subjected to the interpolation process if the audio code associated with the coded data, to which the uncorrectable error is added, is received from the error correction processing means; and

    audio output processing means for outputting the audio data generated by the audio decoding processing means.

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