METHOD OF EFFECTIVE SAMPLING FREQUENCY BITSTREAM COMPOSITION FOR MULTI-CHANNEL AUDIO CODING

摘要

A method for effective sampling frequency bitstream composition in multi-channel audio coding is provided to use the sampling frequency of a spatial information bitstream identical with the sampling frequency of a core codec bitstream in order to efficiently express the sampling frequency index of the spatial information bitstream, thereby improving the efficiency of encoding and transmission by reducing a bit number for the sampling frequency index of the spatial information bitstream. A method for encoding multi-channel audio signals comprises the following steps of: downmixing the multi-channel audio signal and extracting spatial information from the multi-channel audio signal(701,702); and generating a core codec bitstream and a spatial information bitstream by using the same sampling frequency for the downmixed audio signal and the spatial information, wherein indicator information about the sampling frequency is included in one of the core codec bitstream and the spatial information bitstream(703,704).