Method and apparatus to reproduce multi-channel audio signal in multi-channel speaker system

摘要

A method and an apparatus to reproduce a multi-channel audio signal, in which mixing of a center channel signal is performed with a center channel signal in a home theater system. The method of reproducing a multi-channel audio signal includes calculating a delay value of a center channel signal according to location relationships of a listener, a center channel speaker and other channel speakers, regulating a time delay of the center channel signal according to the calculated delay value, and mixing the time-delay regulated center channel signal with other channel signals.

主权项

1. A method of reproducing a multi-channel audio signal, the method comprising:
obtaining a delay value of a center channel signal according to relative locations of a listener, a center channel speaker and other channel speakers with respect to each other, wherein the obtaining of the delay value includes:
calculating a distance in which a sound image of the center channel is moved from a center of the center channel speaker in a direction of a right or a left channel speaker by calculating a distance of the listener to the center channel speaker and a distance of the listener to the right channel speaker when the sound image of the center channel is moved from the center of the center channel speaker in the direction of the left channel speaker or calculating a distance of the listener to the center channel speaker and a distance of the listener to the left channel speaker when the sound image of the center channel is moved from the center of the center channel speaker in the direction of the right channel speaker,calculating a sound pressure level difference between the center channel speaker and one of the right channel speaker and the left channel speaker based on the direction of the sound image movement;setting the sound pressure level difference according to the distance which the sound image of the center channel is moved, as a threshold value, andconverting a distance difference between the listener, and the center channel speaker and between the listener and one of the right channel speaker and the left channel speaker based on the direction of the sound image movement into the delay value within the threshold value; regulating a time delay of the center channel signal according to the obtained delay value; and mixing the time-delay regulated center channel signal with other channel signals.