Audio signal coding method and apparatus

  • US 9,514,762 B2
  • Filed: 02/01/2016
  • Issued: 12/06/2016
  • Est. Priority Date: 10/08/2011
  • Status: Active Grant
First Claim
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1. An audio signal coding method, comprising:

  • categorizing, by a categorizing unit of an encoder, audio signals into high-frequency audio signals and low-frequency audio signals;

    coding, by a low-frequency signal coding unit of an encoder, the low-frequency audio signals by using a time domain coding manner or a frequency domain coding manner; and

    selecting, by a high-frequency signal coding unit of an encoder, a bandwidth extension mode to code the high-frequency audio signals according to a low-frequency coding manner or characteristics of the audio signals; and

    wherein selecting the bandwidth extension mode to code the high-frequency audio signals according to the low-frequency coding manner comprises if the low-frequency audio signals should be coded by using the time domain coding manner, selecting a time domain bandwidth extension mode to perform time domain coding for the high-frequency audio signals.

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