AUDIO CODING METHOD AND RELATED APPARATUS
First Claim
1. An audio signal encoding method performed by an audio signal encoder which comprises a processor and a memory storing program instructions for execution by the processor, the method comprising:
- performing, by the processor, a time-frequency transformation on a current frame of a time-domain audio signal, to obtain spectral coefficients of the current frame;
obtaining, by the processor, one or more reference coding parameters of the current frame;
determining, by the processor, whether the reference coding parameters satisfy a set of parameter conditions;
if any one of the parameter conditions is satisfied, encoding, by the processor, the spectral coefficients of the current frame using a transform coded excitation (TCX) algorithm, orif none of the parameter conditions is satisfied, encoding, by the processor, the spectral coefficients of the current frame using a high quality transform coding (HQ) algorithm.
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Abstract
An audio encoding method and a related apparatus are disclosed. The audio coding method includes: performing a time-frequency transformation on a current frame of a time-domain audio signal, to obtain spectral coefficients of the current audio frame; obtaining one or more reference coding parameters of the current frame; and determining whether the reference coding parameters satisfy a set of parameter conditions. If any one of the parameter conditions is satisfied, the spectral coefficients of the current frame are encoded by using a transform coded excitation (TCX) algorithm. If none of the parameter conditions is satisfied, the spectral coefficients of the current audio frame are encoded using a high quality transform coding (HQ) algorithm. The audio encoding method and the related apparatus help improve encoding quality or encoding efficiency in audio signal encoding.
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Citations
24 Claims
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1. An audio signal encoding method performed by an audio signal encoder which comprises a processor and a memory storing program instructions for execution by the processor, the method comprising:
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performing, by the processor, a time-frequency transformation on a current frame of a time-domain audio signal, to obtain spectral coefficients of the current frame; obtaining, by the processor, one or more reference coding parameters of the current frame; determining, by the processor, whether the reference coding parameters satisfy a set of parameter conditions; if any one of the parameter conditions is satisfied, encoding, by the processor, the spectral coefficients of the current frame using a transform coded excitation (TCX) algorithm, or if none of the parameter conditions is satisfied, encoding, by the processor, the spectral coefficients of the current frame using a high quality transform coding (HQ) algorithm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An audio signal encoder, comprising a processor and a memory storing program instructions for execution by the processor;
- wherein the processor is configured to execute the program instructions to;
perform a time-frequency transformation on a current frame of a time-domain audio signal, to obtain spectral coefficients of the current frame; obtain one or more reference coding parameters of the current frame; determine whether the reference coding parameters satisfy a set of parameter conditions; if any one of the parameter conditions is satisfied, encode the spectral coefficients of the current frame using a transform coded excitation (TCX) algorithm, or if none of the parameter conditions is satisfied, encode the spectral coefficients of the current frame using a high quality transform coding (HQ) algorithm. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
- wherein the processor is configured to execute the program instructions to;
Specification