Audio signal encoding method, decoding method, encoding equipment and decoding equipment

Abstract

The invention provides an audio signal encoding method, a decoding method, encoding equipment and decoding equipment, which are used for realizing audio encoding and decoding with higher quality and improving user experience. The method comprises the following steps: acquiring a current frame of an audio signal, wherein the current frame comprises a high-frequency band signal and a low-frequency band signal; obtaining parameters of the frequency band extension of the current frame according to the high-frequency band signal, the low-frequency band signal and the configuration information of the frequency band extension; obtaining frequency region information, wherein the frequency region information is used for indicating a first frequency range in which tone component detection needs to be performed in the high-frequency band signal; performing tone component detection in a first frequency range to obtain information of tone components of the high-frequency band signal; and performing code stream multiplexing on the parameters of the frequency band extension and the information of the tone components to obtain a load code stream.

Description

technical field [0001] The present application relates to the communication field, and in particular to an audio signal encoding method, a decoding method, an encoding device, and a decoding device. Background technique [0002] With the progress of society and the continuous development of technology, users have higher and higher demands on audio services. How to provide users with higher quality services in the case of limited encoding bit rate, or use lower encoding bit rate to provide users with the same quality of service has always been the focus of audio codec research. [0003] Usually, in the process of encoding audio data, the high-frequency part and the low-frequency part in the audio data are processed separately. In order to reduce the coding bit rate, the correlation between signals of different frequency bands is often further used for coding. For example, the low-band signal is used to generate the high-band signal through methods such as spectrum replicati...

AI Technical Summary

Problems solved by technology

However, there are often some tonal components in the spectrum of the high frequency band that are not similar to the spectrum of the low frequency band, and the existing schemes cannot deal with these dissimilar tonal components, which leads to low coding quality of the actual encoded data

Images