Patent ID: 8942380
Filing Date: 2015-01-27
Classification: H04S

Abstract:
1. A method of generating a downward compatible two-channel sound format having a right channel (R lRT ) and a left channel (L lRT ) from a five channel sound format having the following sound channels: left channel (L) right channel (R) centre channel (C) rear left channel (Ls) rear right channel (Rs), whereas the level of the centre channel (C) is lowered, the level of the centre channel (C) is distributed to the left channel (L) so as to form the left channel (L) so as to form a first sum signal (L′), the level of the rear left channel (Ls) is lowered, the rear left channel (Ls), the level of which has been lowered, is distributed to the first sum signal so as to form the third sum signal which corresponds to the left channel (L the centre channel (C), the level of which has been lowered, is distributed to the right channel (R) so as to form a second sum signal (R′), the level of the rear right channel (Rs) is lowered, the rear right channel (Rs) the level of which has been lowered, is distributed to the second sum signal to form a fourth sum signal which corresponds to the right channel (R wherein: