Matrix surround decoding system

摘要

A matrix surround decoding system comprises a DIR 10 detecting a sampling frequency FS included in a stereophonic source, and a microcomputer 12 determining the type of stereo source on the basis of the sampling frequency detected by the DIR 10, and outputting to a matrix surround decoder 11 a mode switching signal CL for switching the output mode of the matrix surround decoder 11 to a mode corresponding to the determined type of stereophonic source.