Audio signal encoding or decoding

Audio signal encoding or decoding

  • CN 101,540,171 B
  • Filed: 10/28/2004
  • Issued: 11/06/2013
  • Est. Priority Date: 10/30/2003
  • Status: Active Grant
First Claim
Patent Images

1. the audio coder that combination parameterization is stereo and spectral band replication strengthens comprises:

  • Two 64 frequency range analysis bank of filters are used for the stereophony input signal is transformed into subband domain;

    The parametric stereo computing unit is used to stereophony input signal calculating parameter stereo parameter in subband domain obtaining the parametric stereo bit stream, and the monophony downmix that is used for creating subband domain;

    The spectral band replication parameter estimation unit is for the spectral band replication parameter of the monophony downmix of estimating subband domain, to obtain the spectral band replication bit stream;

    32 band synthesis filter groups are used for the monophony downmix is transformed into time domain from subband domain;

    WithCore encoder is used for time domain monophony downmix is encoded, to obtain core bit stream.

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