Method and apparatus for concealing frame error and method and apparatus for audio decoding
First Claim
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1. A frame error concealment method comprising:
- when a current frame is classified as an error frame, performing a frequency domain error concealment processing on the current frame to generate spectral coefficients of the current frame;
generating a time domain signal of the current frame based on a time-frequency inverse transform; and
when the current frame is classified as the error frame or a next good frame after the error frame, performing a corresponding time domain error concealment processing on the time domain signal of the current frame by using a mode from among a plurality of modes including at least one mode associated with repetition and smoothing,wherein the mode from among the plurality of modes is selected according to whether the current frame is stationary.
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Abstract
A frame error concealment (FEC) method is provided. The method includes: selecting an FEC mode based on states of a current frame and a previous frame of the current frame in a time domain signal generated after time-frequency inverse transform processing; and performing corresponding time domain error concealment processing on the current frame based on the selected FEC mode, wherein the current frame is an error frame or the current frame is a normal frame when the previous frame is an error frame.
30 Citations
10 Claims
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1. A frame error concealment method comprising:
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when a current frame is classified as an error frame, performing a frequency domain error concealment processing on the current frame to generate spectral coefficients of the current frame; generating a time domain signal of the current frame based on a time-frequency inverse transform; and when the current frame is classified as the error frame or a next good frame after the error frame, performing a corresponding time domain error concealment processing on the time domain signal of the current frame by using a mode from among a plurality of modes including at least one mode associated with repetition and smoothing, wherein the mode from among the plurality of modes is selected according to whether the current frame is stationary. - View Dependent Claims (2, 3, 4, 5)
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6. A frame error concealment apparatus comprising:
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at least one processing device configured to; when a current frame is classified as an error frame, perform a frequency domain error concealment processing on the current frame to generate spectral coefficients of the current frame; generate a time domain signal of the current frame based on a time-frequency inverse transform; and when the current frame is classified as the error frame or a next good frame after the error frame, perform a corresponding time domain error concealment processing on the time domain signal of the current frame by using a mode from among a plurality of modes including at least one mode associated with repetition and smoothing, wherein the mode from among the plurality of modes is selected according to whether the current frame is stationary. - View Dependent Claims (7, 8, 9, 10)
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Specification