METHOD AND DEVICE FOR CODING/DECODING AUDIO SIGNALS

摘要

Provided are a method and device for coding/decoding audio signals. The coding method includes: dividing the frequency band of an audio signal into a plurality of sub-bands and quantizing the sub-band normalization factor of each sub-band (101); determining the signal bandwidth for bit allocation according to the quantized sub-band normalization factors or according to the quantized sub-band normalization factors and bit rate information (102); allocating bits to the sub-bands in the determined signal bandwidth (103); and coding the spectral coefficients of the audio signal according to the allocated bits of each sub-band (104). In the present method, the signal bandwidth for bit allocation is determined according to the quantized sub-band normalization factors or the bit rate information during coding, so that the bits can be centralized to effectively code the signal bandwidth, improving the audio quality.