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A method and device for encoding phase difference parameters between channels

A technology of parameter encoding and encoding method, which is applied in the field of encoding method and device of phase difference parameters between channels, and can solve the problems of low precision of phase information and poor encoding quality, etc.

Active Publication Date: 2021-01-05
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be seen that the prior art 2 only calculates one IPD parameter (ie, the Group IPD parameter) and can only quantize one IPD parameter. Although it occupies less resources, the encoded phase information has low precision and poor encoding quality.

Method used

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  • A method and device for encoding phase difference parameters between channels
  • A method and device for encoding phase difference parameters between channels
  • A method and device for encoding phase difference parameters between channels

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Embodiment Construction

[0145] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0146] see figure 1 , figure 1 It is a schematic diagram of the principle of PS coding.

[0147] In PS encoding, the encoder downmixes the encoded stereo signal of multi-channel (such as x1 channel and x2 channel) input into a mono audio signal, and extracts the stereo signal through spatial perception parameter analysis. The spatial perception parameter is further obtained by encoding the monophonic audio signal to obtain a monophonic audio bitstream, and the sp...

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Abstract

The present application discloses an encoding method of an inter-channel phase difference parameter, comprising: acquiring a reference parameter for determining the encoding mode of an inter-channel phase difference IPD parameter of a current frame of a multi-channel signal; determining the current IPD parameter according to the reference parameter The IPD parameter encoding method of the frame, the determined IPD parameter encoding method of the current frame is one of at least two preset IPD parameter encoding methods; The frame's IPD parameters are processed. Using the technical solution provided by this application, the coding quality of multi-channel signals can be improved.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a coding method and device for a phase difference parameter between channels. Background technique [0002] With the improvement of the quality of life, people's demand for high-quality audio continues to increase. Compared with monophonic audio, stereo audio has a sense of orientation and distribution of each sound source, can improve the clarity and intelligibility of audio information, and enhance the presence of audio playback, so it is favored by people. [0003] A parametric stereo (Parametric Stereo, PS) coding technology is a commonly used stereo coding technology. PS coding technology encodes and decodes stereo signals (that is, multi-channel signals) according to the spatial perception characteristics, specifically converting the codec of multi-channel signals into the codec of mono audio signals and the codec of spatial perception parameters . Spatial...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L19/008G10L19/032
CPCG10L19/008G10L19/032H04S2420/03H04S3/008H04S2400/03
Inventor 张兴涛李海婷刘泽新苗磊
Owner HUAWEI TECH CO LTD