FIELD: physics.
SUBSTANCE: this group of inventions involves performing the correct allocation of quantization bits for the spectral coefficients of the audio signal, thereby improving the quality of the signal received by the decoder by decoding. The method includes: after splitting the spectral coefficients of the current data frame into subbands, obtaining the values of the quantized frequency envelopes of the subbands; changing the values of the quantized frequency envelopes of the subbands in the first number in the subbands; allocating quantization bits to subbands according to the changed values of the quantized frequency envelopes of the subbands in the first quantity; quantizing the spectral coefficient of the subband, to which the quantization bit is allocated, on the subbands; and recording the quantized spectral subband coefficient, to which the quantization bit is allocated, into a bitstream.
EFFECT: increasing the efficiency of compression coding and improving the signal quality.
28 cl, 7 dwg
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RU2236046C2 |
