Audio encoding

Audio encoding

CN
  • CN 100,489,964 C
  • Filed: 08/17/2007
  • Issued: 05/20/2009
  • Est. Priority Date: 08/18/2006
  • Status: Active Grant
First Claim
Patent Images

1. , a kind of method that sound signal is decoded of being used for comprises:

  • (a) acquisition comprises the bit stream of a plurality of frames, and each frame comprises the process information relevant with this frame and represent that the entropy coding of these frame sound intermediate frequency data quantizes label that described process information comprises;

    (i) a plurality of code book labels, code book of each code book label identification,(ii) the code book application message is used to specify the entropy coding that will use code book and quantizes label range, and(iii) window information;

    (b) quantize label range by being applied to by the code book that the code book label is discerned, entropy coding is quantized label decode by the specified entropy coding of code book application message;

    (c) by the quantification label of being decoded is carried out inverse quantization, generate sub-band sample;

    (d), identify a plurality of different window functions of an applied sequence in single audio data frame based on window information;

    And(e) by sub-band sample is carried out inverse transformation, and in described single audio data frame, use, obtain the time-domain audio data by the indicated described a plurality of different window functions of window information.

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