A Stereo Codec Method

Abstract

The invention discloses a stereo encoding method, which comprises the following steps: a time-domain signal acquisition step; a block length selection step; a time-frequency conversion step; a stereo parameter encoding step; a monophonic channel processing step; and a packaging step. The invention also discloses a stereo decoding method, which comprises the following steps: unpacking; monophonic decoding; stereo parameter decoding; stereo processing; and time-frequency inverse transformation. The codec method of the present invention not only provides a more compact fusion framework with the core mono codec, but also reuses the time-frequency transformation steps, thereby reducing the amount of calculation and delay overhead caused by repeated time-frequency transformations; and Provides a more flexible encoding method of inter-frame combination and intra-frame combination, which reduces the data volume of the final encoding result, thereby ensuring higher audio quality under different stereo parameter bit 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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