×

Method, apparatus, and medium for bandwidth extension encoding and decoding

  • US 8,239,193 B2
  • Filed: 09/17/2009
  • Issued: 08/07/2012
  • Est. Priority Date: 01/12/2007
  • Status: Active Grant
First Claim
Patent Images

1. A method of bandwidth extension decoding, comprising:

  • checking whether a signal has been encoded in a frequency domain or a time domain;

    performing lossless-decoding and de-quantization, and inverse-transforming the signal to the time domain if the checking result shows that the signal has been encoded in the frequency domain;

    performing decoding of the signal using CELP (code excited linear prediction) if the checking result shows that the signal has been encoded in the time domain;

    transforming the signal that has been inverse-transformed to the time domain, using a quadrature mirror filterbank (QMF), or transforming the signal that has been decoded using CELP, using the QMF;

    generating a high frequency band signal using the transformed signal;

    generating a stereo signal from the high frequency band signal and the transformed signal; and

    inverse-transforming the stereo signal using an inverse QMF.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×