High resolution audio coding
AssigneeHuawei Technologies Co., Ltd.
InventorYang GAO
Life of this patent
Estimating the term…
Abstract
Methods, systems, apparatuses, and computer programs encoded on computer storage media for performing linear predictive coding (LPC) are described. At least one of a differential spectrum tilt and an energy difference between a current frame and a previous frame of the audio signal is determined. A spectral stability of the audio signal is detected based on at least one of the differential spectrum tilt and an energy difference between the current frame and the previous frame of the audio signal. In response to detecting the spectral stability of the audio signal, quantized LPC parameters for the previous frame are copied into the current frame of the audio signal.
Claims20
A computer-implemented method for performing linear predictive coding (LPC) of an audio signal, comprising:
- determining at least one of a differential spectrum tilt and an energy difference between a current frame and a previous frame of the audio signal;
- detecting a spectral stability of the audio signal based on at least one of the differential spectrum tilt and the energy difference between the current frame and the previous frame of the audio signal;
- and
- in response to detecting the spectral stability of the audio signal, copying quantized LPC parameters for the previous frame into the current frame of the audio signal.
An electronic device, comprising:
- a memory;
- and
- one or more processors in communication with the memory, wherein the one or more processors are configured to:
- determine at least one of a differential spectrum tilt and an energy difference between a current frame and a previous frame of an audio signal;
- detect a spectral stability of the audio signal based on at least one of the differential spectrum tilt and the energy difference between the current frame and the previous frame of the audio signal;
- and
- in response to detecting the spectral stability of the audio signal, copy quantized LPC parameters for the previous frame into the current frame of the audio signal.
A non-transitory computer-readable medium storing computer instructions for performing linear predictive coding (LPC) of an audio signal, that when executed by one or more processors, cause the one or more processors to perform operations comprising:
- determining at least one of a differential spectrum tilt and an energy difference between a current frame and a previous frame of the audio signal;
- detecting a spectral stability of the audio signal based on at least one of the differential spectrum tilt and the energy difference between the current frame and the previous frame of the audio signal;
- and
- in response to detecting the spectral stability of the audio signal, copying quantized LPC parameters for the previous frame into the current frame of the audio signal.
Dependencies are inferred from the claim text.