Audio signal processing method and apparatus

A computer device, comprising:

• a processor, and
• a memory, coupled to the processor to store instructions, which when executed by the processor, cause the processor to:
• obtain a plurality of sub-bands of an audio signal and a scale factor of each sub-band;
• determine, based on scale factors of the plurality of sub-bands, a reference value used for shaping a spectral envelope of the audio signal;
• and
• shape the spectral envelope of the audio signal by using the reference value as a baseline, to obtain an adjustment factor of each sub-band corresponding to a shaped spectral envelope, wherein the adjustment factor is used to quantize a spectral value of the audio signal, and/or the adjustment factor is used to dequantize a code value of the spectral value.

A non-transitory machine-readable storage medium having instructions stored therein, which when executed by a processor, causes the processor to perform operations, the operations comprising:

• obtaining a plurality of sub-bands of an audio signal and a scale factor of each sub-band;
• determining, based on scale factors of the plurality of sub-bands, a reference value used for shaping a spectral envelope of the audio signal;
• and
• shaping the spectral envelope of the audio signal by using the reference value as a baseline, to obtain an adjustment factor of each sub-band corresponding to a shaped spectral envelope, wherein the adjustment factor is used to quantize a spectral value of the audio signal, and/or the adjustment factor is used to dequantize a code value of the spectral value.