Inter-Channel Phase Difference Parameter Extraction Method and Apparatus

Patent metadata

Field	Value
Publication number	US-2025363998-A1
Application number	US-202519244739-A
Country	US
Kind code	A1
Filing date	Jun 20, 2025
Priority date	May 31, 2016
Publication date	Nov 27, 2025
Grant date	—

Abstract

An inter-channel phase difference (IPD) parameter extraction method includes obtaining a parameter for obtaining an information extraction manner for a current frame of a multi-channel signal; obtaining an IPD parameter extraction manner for the current frame based on the parameter for obtaining the information extraction manner, where the obtained IPD parameter extraction manner is one of at least two preset IPD parameter extraction manners; and obtaining an IPD parameter of the current frame based on the obtained IPD parameter extraction manner for the current frame.

First claim

1 . A method comprising:
obtaining a current frame of an audio signal comprising a left channel and a right channel; obtaining a parameter representing a left-right channel coherence of the current frame, wherein the parameter satisfies the following formulas:

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Assignees

• Huawei Tech Co Ltd

Inventors

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

Classifications

• G10L25/03

  characterised by the type of extracted parameters · 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