Stereo coding method and stereo decoding method

Abstract

The invention discloses a stereo coding method which comprises the following steps: acquiring a time-domain signal, selecting a block length, converting time frequency, coding stereo parameters, processing a single track and packaging. The invention also discloses a stereo decoding method which comprises the following steps: unpackaging, decoding the single track, decoding the stereo parameters, processing stereo and inversely converting the time frequency. After the stereo coding method and the stereo decoding method are adopted, an integration framework which is more compact with a core single track coding and encoding device is provided, and the step of converting the time frequency is reused, so that the calculated amount and the time delay cost which are caused by repeatedly converting the time frequency can be reduced; furthermore, a more flexible coding method of interframe combination and intra-frame combination is provided, so that the data size of the final coding result is reduced, and the higher audio quality can be obtained under the different stereo parameter code rate configurations.

Description

technical field [0001] The invention relates to the technical field of audio and video, in particular to a stereo encoding and decoding method. Background technique [0002] In the prior art, recording sound with digital methods has stronger advantages than recording sound with analog methods, such as strong anti-noise ability during transmission, increased audio dynamic range, and no signal attenuation for multiple duplications. Audio files are therefore usually recorded digitally. However, as people's requirements for multimedia sound are getting higher and higher, the amount of data required to record sound is increasing. Audio files with a large amount of data not only need to occupy a wide transmission bandwidth during the transmission process, but also need to occupy a large amount of storage space during the storage process. In order to solve the problem of excessive data volume of audio files, digital audio compression technology is usually used in digital audio to...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem that the overall process of the existing stereo encoding and decoding method is too complicated, the present invention provides a stereo encoding method, which includes the following steps:

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