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Audio coding method and apparatus

  • US 10,553,227 B2
  • Filed: 10/23/2018
  • Issued: 02/04/2020
  • Est. Priority Date: 03/14/2014
  • Status: Active Grant
First Claim
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1. A method for encoding an audio signal, wherein a frequency spectrum of the audio signal is divided into at least a first and a second region, wherein at least the second region comprises a number of bands, the method comprising:

  • encoding spectral peak segments in the first region using a first coding method;

    encoding at least one non-peak segment in the first region using a second coding method different from the first coding method;

    determining a first relation between an energy of a band in the second region and energies of the spectral peaks in the first region;

    determining a second relation between the energy of the band in the second region and an average energy of the second region;

    responsive to encoding the spectral peak segments and the at least one non-peak segment in the first region, determining an available number of bits out of a bit budget for encoding the audio signal is sufficient for encoding the band in the second region;

    responsive to determining the first and second relations fulfil a predetermined criterion and determining the number of bits out of the bit budget for encoding the audio signal is sufficient, encoding the band in the second region using the second coding method.

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