Patent ID: 6665407
Filing Date: 2003-12-16
Classification: H04R

Abstract:
A system for directionally encoding an audio signal reproducing it over a plurality of loudspeakers comprising:an encoder for encoding a received signal including an audio portion and an azimuthally information portion into Left, Right, and W (L,R,W) channels, with the encoder for calculating left and right channel weights having an amplitude between 0 and 1 and where, for an azimuthally angle (Az), R(Az)=L(Az+90Â°) and 1âˆ’L(Az)=L(Az+180Â°); and a decoder for receiving said L and R channels and the W channel equal to the audio portion of the signal, with the decoder for providing said Left channel, said Right channel, wherein the decoder provides a Surround Left channel equal to the difference of the W and Right channels and wherein the decoder provides a Right surround channel equal to the difference of the W and Left channels.