Patent ID: 8612239
Filing Date: 2013-12-17
Classification: G10L

Abstract:
1. An apparatus for coding audio signals based on signal distribution characteristics of each channel, comprising: a down-mixer for receiving multi-channel audio signals and down-mixing the multi-channel audio signals into mono signals; a coder for coding the mono signals; an input channel correlation analyzer for receiving the multi-channel audio signals, deciding whether to give stereo effect to the multi-channel audio signals based on signal distribution characteristics of the multi-channel audio signals for each channel, and outputting a control signal indicating whether to perform stereo representation process; and a stereo representation unit for performing stereo representation process onto the multi-channel audio signals when the control signal indicating to perform stereo representation process, wherein the input channel correlation analyzer includes: wherein the stereo coding decider generates and outputs a control signal including information for inactivating operation of the stereo representation unit when the correlation ratio is smaller than the threshold, and the stereo coding decider generates and outputs a control signal including information for operating the stereo representation unit when the correlation ratio is not smaller than the threshold.