Method for realizing digital audio encoding by using new psychoacoustic model and quick bit allocation
A psychoacoustic model and bit allocation technology, applied in the field of digital audio coding, can solve problems such as large amount of calculation, reduced sound quality, high complexity, etc., and achieve the effect of overcoming large amount of calculation.
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[0082] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.
[0083] The invention is a method for realizing digital audio coding by using a new type of psychoacoustic model and fast bit allocation. The window type is determined according to the variance of the input audio signal, and the quantization noise is allocated through the determined window type and the energy of the input audio signal. When assigning and quantizing, use the global scale factor of the previous frame as the initial value for the global scale factor, and obtain an accurate initial value for each segment scale factor through model derivation, and finally obtain the final global scale factor and the ratio of each segment through fine-tuning The value of the factor.
[0084] See attached figure 1, the time-domain signal after framing enters 101 and 102, and the audio encoder analyzes the input audio signal using a new psychoacoustic...
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