Frame error concealment method and apparatus, and audio decoding method and apparatus
First Claim
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1. A time domain frame error concealment apparatus comprising:
- at least one processor configured to;
when a frame is classified as an error frame or a next good frame after the error frame, select one tool from among a plurality of tools including a first tool using phase matching and a second tool using repetition and smoothing, based on a plurality of parameters including stationarity of the frame; and
perform a corresponding time domain error concealment processing on the frame, based on the selected tool,wherein the frame is obtained from transform from a frequency domain to a time domain,wherein the first tool includes a first mode related to a single error frame, a second mode related to a burst error frame, and a third mode related to the next good frame after the error frame, andwherein the second tool includes a first mode related to the error frame, a second mode related to the next good frame after a single error frame, and a third mode related to the next good frame after a burst error frame.
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Abstract
Disclosed are a frame error concealment method and apparatus and an audio decoding method and apparatus. The frame error concealment (FEC) method includes: selecting an FEC mode based on at least one of a state of at least one frame and a phase matching flag, with regard to 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.
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Citations
16 Claims
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1. A time domain frame error concealment apparatus comprising:
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at least one processor configured to; when a frame is classified as an error frame or a next good frame after the error frame, select one tool from among a plurality of tools including a first tool using phase matching and a second tool using repetition and smoothing, based on a plurality of parameters including stationarity of the frame; and perform a corresponding time domain error concealment processing on the frame, based on the selected tool, wherein the frame is obtained from transform from a frequency domain to a time domain, wherein the first tool includes a first mode related to a single error frame, a second mode related to a burst error frame, and a third mode related to the next good frame after the error frame, and wherein the second tool includes a first mode related to the error frame, a second mode related to the next good frame after a single error frame, and a third mode related to the next good frame after a burst error frame. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A time domain frame error concealment method comprising:
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when a frame is classified as an error frame or a next good frame after the error frame, selecting one tool from among a plurality of tools including a first tool using phase matching and a second tool using repetition and smoothing, based on a plurality of parameters including stationarity of the frame; and performing a corresponding time domain error concealment processing on the frame, based on the selected one tool, wherein the first tool includes a first mode related to a single error frame, a second mode related to a burst error frame, and a third mode related to the next good frame after the error frame, and wherein the second tool includes a first mode related to the error frame, a second mode related to the next good frame after a single error frame, and a third mode related to the next good frame after a burst error frame. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification