INTER-CHANNEL PHASE DIFFERENCE PARAMETER EXTRACTION METHOD AND APPARATUS

摘要

An inter-channel phase difference parameter extraction method and apparatus are provided. The extraction method includes: obtaining a parameter used to determine an information extraction manner for a current frame of a multi-channel signal (S101); determining an IPD parameter extraction manner for the current frame of multi-channel signal based on the parameter used to determine the information extraction manner for the current frame of the multi-channel signal (SI02), where the determined IPD parameter extraction manner for the current frame of multi-channel signal is one of at least two preset IPD parameter extraction manners; and extracting an IPD parameter of the current frame of multi-channel signal based on the determined IPD parameter extraction manner for the current frame of multi-channel signal (SI03). Therefore, choices of the IPD parameter extraction manner can be enriched, phase information can be better maintained, and audio coding quality can be improved.