Audio Coding Method and Apparatus
AssigneeHuawei Technologies Co., Ltd.
InventorsZexin Liu, Bin Wang, Lei Miao
Life of this patent
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Abstract
A method comprises determining a first modification weight according to linear spectral frequency (LSF) differences of the current frame and LSF differences of a previous frame of the current frame, when a signal characteristic of the current frame meets a preset modification condition, modifying the linear predictive parameter of the current frame according to the determined first modification weight, and coding the current frame according to the modified linear predictive parameter.
Claims20
A computer program product comprising computer-executable instructions for storage on a non-transitory computer-readable medium that, when executed by a processor of a device, cause the device to:
- determine whether a signal characteristic of a current frame of an audio signal meets a preset modification condition;
- determine a first modification weight according to linear spectral frequency (LSF) differences of the current frame and LSF differences of a previous frame of the audio signal in response to the signal characteristic of the current frame meeting the preset modification condition;
- modify a linear predictive parameter of the current frame according to the first modification weight to obtain a modified linear predictive parameter;
- and
- code the current frame according to the modified linear predictive parameter.
An audio coding apparatus comprising:
- a memory storing instructions;
- and
- a processor coupled to the memory and configured to execute the instructions, which cause the processor the be configured to:
- obtain an audio signal;
- perform linear prediction analysis on the audio signal to obtain a linear predictive parameter of a current frame of the audio signal;
- modify the linear predictive parameter of the current frame according to a preset value in response to the current frame being a transition frame to obtain a modified linear predictive parameter of the current frame;
- and
- code the current frame according to the modified linear predictive parameter.
An audio coding apparatus comprising:
- a memory storing instructions;
- and
- a processor coupled to the memory and configured to execute the instructions, which cause the processor to be configured to:
- determine whether a signal characteristic of a current frame of an audio signal meets a preset modification condition;
- determine a first modification weight according to linear spectral frequency (LSF) differences of the current frame and LSF differences of a previous frame of the audio signal in response to the signal characteristic meeting the preset modification condition;
- modify a linear predictive parameter of the current frame according to the first modification weight to obtain a modified linear predictive parameter;
- and
- code the current frame according to the modified linear predictive parameter.
Dependencies are inferred from the claim text.