Audio encoding and decoding method and device, medium and electronic equipment

Abstract

The invention belongs to the technical field of audio coding and decoding, and particularly relates to an audio coding and decoding method and device, a medium and electronic equipment. The audio coding method comprises the following steps: performing sub-band decomposition on audio to be coded to obtain a to-be-coded low-frequency signal corresponding to a low-frequency band and a to-be-coded high-frequency signal corresponding to a high-frequency band; performing compression coding on the to-be-coded low-frequency signal to obtain low-frequency coded data of the to-be-coded low-frequency signal; obtaining high-frequency prediction information corresponding to the to-be-coded low-frequency signal according to the correlation between the low-frequency signal and the high-frequency signal; performing feature extraction on the to-be-coded high-frequency signal to obtain high-frequency feature information of the to-be-coded high-frequency signal, and determining high-frequency compensation information of the to-be-coded high-frequency signal according to the difference between the high-frequency feature information and the high-frequency prediction information; and packaging the low-frequency coded data and the high-frequency compensation information to obtain audio coded data of the audio to be coded. The method can compress the coding rate of the high-frequency signal and ensure the accuracy of the high-frequency signal.

Description

technical field [0001] This application belongs to the technical field of audio coding and decoding, and relates to artificial intelligence technology. Specifically, the present application relates to an audio encoding method, an audio decoding method, an audio encoding device, an audio decoding device, a computer-readable medium, and an electronic device. Background technique [0002] Audio codec plays an important role in modern communication systems. Compression and coding of audio data can reduce the network bandwidth pressure of audio data in network transmission, and save the storage cost and transmission cost of audio data. [0003] The spectrum of audio data such as music and speech is mainly concentrated in the low frequency band, and the high frequency band has a small range. If the entire frequency band is encoded, if the low-frequency data is encoded too finely in order to protect the high-frequency data, resulting in a huge amount of encoded file data, it is di...

AI Technical Summary

Problems solved by technology

[0005] The purpose of this application is to provide an audio encoding method, an audio decoding method, an audio encoding device, an audio decoding device, a computer-readable medium, and an electronic device, at least to a certain extent, to overcome the high-band audio data components existing in the audio encoding and decoding technology Technical problems such as loss and poor transmission accuracy

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