Inter-channel phase difference parameter encoding method and apparatus

Patent metadata

Field	Value
Publication number	US-2025391416-A1
Application number	US-202519268726-A
Country	US
Kind code	A1
Filing date	Jul 14, 2025
Priority date	Jun 30, 2017
Publication date	Dec 25, 2025
Grant date	—

Abstract

The present disclosure discloses an inter-channel phase difference parameter encoding method, where a current frame is obtained; a signal type and a previous IPD parameter encoding scheme of a previous frame are obtained; a current IPD parameter encoding scheme is obtained at least based on the signal type of the previous frame and the previous IPD parameter encoding scheme; and an IPD parameter of the current frame is processed based on the current IPD parameter encoding scheme.

First claim

1 . An inter-channel phase difference (IPD) parameter encoding method, comprising:
obtaining a correlation parameter of a current frame indicating correlation between a left channel and a right channel of the current frame; comparing the correlation parameter with a preset threshold; when the correlation parameter is greater than or equal to the preset threshold, determining an IPD parameter encoding scheme of the current frame is skipping encoding of an IPD parameter of the current frame; and processing an IPD parameter of the current frame based on the determined IPD parameter encoding scheme of the current frame.

2 . The method according to claim 1 , wherein when the correlation parameter is less than the preset threshold, determining an IPD parameter encoding scheme of the current frame is not skipping encoding of an IPD parameter of the current frame.

3 . The method according to claim 1 , wherein the preset threshold is 0.75.

4 . An encoding apparatus, comprising:
at least one processor; and one or more memories coupled to the at least one processor and storing programming instructions for execution by the at least one processor to cause the encoding apparatus to: obtain a correlation parameter of a current frame indicating correlation between a left channel and a right channel of the current frame; compare the correlation parameter with a preset threshold; when the correlation parameter is greater than or equal to the preset threshold, determine an inter-channel phase difference (IPD) parameter encoding scheme of the current frame is skipping encoding of an IPD parameter of the current frame; and process an IPD parameter of the current frame based on the determined IPD parameter encoding scheme of the current frame.

5 . The encoding apparatus according to claim 4 , wherein the programming instructions for execution by the at least one processor to cause the encoding apparatus further to:
determine an IPD parameter encoding scheme of the current frame is not skipping encoding of an IPD parameter of the current frame when the correlation parameter is less than the preset threshold.

6 . The encoding apparatus according to claim 4 , wherein the preset threshold is 0.75.

7 . A non-transitory computer-readable storage medium having a program recorded thereon, wherein the program when executed by a processor, configures a computer to:
obtain a correlation parameter of a current frame indicating correlation between a left channel and a right channel of the current frame; compare the correlation parameter with a preset threshold; when the correlation parameter is greater than or equal to the preset threshold, determine an inter-channel phase difference (IPD) parameter encoding scheme of the current frame is skipping encoding of an IPD parameter of the current frame; and process an IPD parameter of the current frame based on the determined IPD parameter encoding scheme of the current frame.

8 . The computer-readable storage medium according to claim 7 , wherein the program configures the computer further to:
determine an IPD parameter encoding scheme of the current frame is not skipping encoding of an IPD parameter of the current frame when the correlation parameter is less than the preset threshold.

9 . The computer-readable storage medium according to claim 7 , wherein the preset threshold is 0.75.

Assignees

• Huawei Tech Co Ltd

Inventors

• Zhang Xingtao
• Li Haiting
• Liu Zexin
• Miao Lei

Classifications

• H04S2420/03

  Application of parametric coding in stereophonic audio systems · CPC title

• H04S2400/03

  Aspects of down-mixing multi-channel audio to configurations with lower numbers of playback channels, e.g. 7.1 -> 5.1 (H04S2400/01 takes precedence) · CPC title

• H04S3/008

  in which the audio signals are in digital form, i.e. employing more than two discrete digital channels (data reduction aspects thereof based on psychoacoustics G10L19/02) · CPC title

• G10L19/032

  Quantisation or dequantisation of spectral components · CPC title

• G10L19/008 Primary

  Multichannel audio signal coding or decoding using interchannel correlation to reduce redundancy, e.g. joint-stereo, intensity-coding or matrixing · CPC title