Audio fine scalable coding method and system based on perception self-adaption bit allocation
A technology of hierarchical coding and bit allocation, applied in the field of audio coding, can solve the problems of lack of sub-band bits, quantization efficiency and classification granularity cannot have a good unified process, affecting sound quality, etc., to achieve quantization accuracy and quantization efficiency, Efficient and precise scalable audio coding, the effect of improving the grading accuracy
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[0046] The present invention mainly takes the perceptual importance of sub-bands as a measure standard, and proposes an audio fine hierarchical coding method and system based on perceptual adaptive bit allocation.
[0047] Compared with the one-time allocation of bits to the sub-band with the highest perceptual importance, the present invention increases the classification accuracy, and compared with the bit-by-bit allocation method, improves the coding efficiency. Starting from the perceptual characteristics of the human ear, the perceptual importance To measure the standard, the sub-bands are subjected to scalable vector quantization to improve the classification accuracy. The present invention will be described in detail below in conjunction with the accompanying drawings.
[0048] The audio fine hierarchical coding method based on perceptual adaptive bit allocation provided by the present invention specifically includes the following steps, such as figure 1 shown, includin...
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