Patent ID: 8532309

Claim:
A signal correction apparatus comprising: a sound quality estimation module with channels configured to receive signals, configured to generate channel importance information indicative of importance levels of the channels based on correlations of the signals, and to generate frequency importance information indicative of importance levels of frequency components of the signals according to noise levels of the frequency components; a sound quality enhancement controller configured to detect a valid channel based on the channel importance information and a valid frequency component based on the frequency importance information, and to generate valid channel information indicative of the valid channel and valid frequency information indicative of the valid frequency component; and a sound quality enhancement processor configured to enhance sound quality of the valid frequency component of a signal which is received through the valid channel, based on the valid channel information and the valid frequency information, wherein the sound quality estimation module is configured to perform correlation analysis between two channels in order to generate a similarity, and to generate the channel importance information indicating importance levels of the two channels wherein the importance levels of the two channels are lower than a threshold level when the similarity is higher than a threshold similarity.