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Low Bitrate Audio Encoding/Decoding Scheme Having Cascaded Switches

  • US 20110202354A1
  • Filed: 01/11/2011
  • Published: 08/18/2011
  • Est. Priority Date: 07/11/2008
  • Status: Active Grant
First Claim
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1. Audio encoder for encoding an audio input signal, the audio input signal being in a first domain, comprising:

  • a first coding branch for encoding an audio signal using a first coding algorithm to acquire a first encoded signal;

    a second coding branch for encoding an audio signal using a second coding algorithm to acquire a second encoded signal, wherein the first coding algorithm is different from the second coding algorithm; and

    a first switch for switching between the first coding branch and the second coding branch so that, for a portion of the audio input signal, either the first encoded signal or the second encoded signal is in an encoder output signal,wherein the second coding branch comprises;

    a converter for converting the audio signal into a second domain different from the first domain,a first processing branch for processing an audio signal in the second domain to acquire a first processed signal;

    a second processing branch for converting a signal into a third domain different from the first domain and the second domain and for processing the signal in the third domain to acquire a second processed signal; and

    a second switch for switching between the first processing branch and the second processing branch so that, for a portion of the audio signal input into the second coding branch, either the first processed signal or the second processed signal is in the second encoded signal.

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