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Method and apparatus for processing lost frame

  • US 9,852,738 B2
  • Filed: 12/21/2016
  • Issued: 12/26/2017
  • Est. Priority Date: 06/25/2014
  • Status: Active Grant
First Claim
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1. A method for recovering lost frames in a received audio signal, performed by a signal decoding apparatus in an audio signal receiver, wherein the method comprises:

  • determining an initial high-frequency band signal of a current lost frame in a received audio signal;

    determining a gain of the current lost frame according to a gain of a previous frame of the current lost frame;

    obtaining adjustment information of the current lost frame for adjusting the gain of the current lost frame;

    obtaining an adjusted gain of the current lost frame by adjusting the gain of the current lost frame according to the adjustment information;

    obtaining an adjusted excitation adjustment factor according to the adjustment information; and

    adjusting the initial high-frequency band signal according to the adjusted gain and the adjusted excitation adjustment factor, to obtain the high-frequency band signal of the current lost frame;

    wherein the adjustment information of the current lost frame comprises any one or any combination of;

    class information of the current lost frame,low-frequency band spectral tilt of the current lost frame, andlow-frequency band signal energy of the current lost frame.

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