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1.发明公开Method, device, encoder apparatus, decoder apparatus and audio system 有权VERFAHREN，VORRICHTUNG，KODIERER，DEKODIERER UND AUDIOSYSTEM
公开(公告)号：EP2175671A2
公开(公告)日：2010-04-14
申请号：EP10152627.5
申请日：2005-07-07
发明人： Van Loon, Machiel W. , Breebart, Dirk J. , Hotho, Gerard H. , Schuiers, Erik G. P. , Purnhagen, Heiko , Rödén, Karl J.
CPC分类号： H04S3/02 , G10L19/008 , H04S1/007 , H04S2400/03 , H04S2420/03
摘要： A method and a device for processing a stereo signal obtained from an encoder, which codes an N-channel audio signal into spatial parameters (P) and a stereo down-mix comprising first and second stereo signals (L 0 , R 0 ). A first signal and a third signal are added in order to obtain a first output signal (L 0w ), wherein the first signal QL 0wL ) comprises the first stereo signal (L 0 ) modified by a first complex function (g 1 ), and the third signal (L 0wR ) comprises the second stereo signal (R 0 ) modified by a third complex function (g 3 ). A second signal and a fourth signal are added to obtain a second output signal (R 0w ). The fourth signal (R 0wR ) comprises the second stereo signal (R 0 ) modified by a fourth complex function (g 4 ), and the second signal (R 0wL ) comprises the first stereo signal (L 0 ) modified by a second complex function (g 2 ). The complex functions (g 1 ,g 2 ,g 3 ,g 4 ) are functions of the spatial parameters (P) and are chosen such that an energy value of the difference (L 0wL -P 0wL ) between the first signal and the second signal is larger than or equal to the energy value of the sum (L 0wL +R 0wL ) of the first and the second signal and the energy value of the difference (R 0wR -L 0wR ) between the fourth signal and the third signal is larger than or equal to the energy value of the sum (R 0wR +L 0wR ) of the fourth signal and the third signal.
摘要翻译： 一种用于处理从编码器获得的立体声信号的方法和装置，其将N声道音频信号编码为空间参数（P）和包括第一和第二立体声信号（L 0，R 0）的立体声缩混混音。 添加第一信号和第三信号以获得第一输出信号（L 0w），其中第一信号QL 0wL）包括由第一复函数（g 1）修改的第一立体声信号（L 0），以及 第三信号（L 0wR）包括由第三复合函数（g 3）修改的第二立体声信号（R 0）。 添加第二信号和第四信号以获得第二输出信号（R 0w）。 第四信号（R 0wR）包括由第四复函数（g 4）修改的第二立体声信号（R 0），第二信号（R 0wL）包括由第二复函数修改的第一立体声信号（L 0） （g 2）。 复数函数（g 1，g 2，g 3，g 4）是空间参数（P）的函数，并且被选择为使得第一信号和第二信号之间的差的能量值（L 0wL -P 0wL） 信号大于或等于第一和第二信号的和（L 0wL + R 0wL）的能量值，第四信号和第三信号之间的差（R 0wR -L 0wR）的能量值是 大于或等于第四信号和第三信号的和（R 0wR + L 0wR）的能量值。
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公开(公告)号：EP2175671B1
公开(公告)日：2012-05-09
申请号：EP10152627.5
申请日：2005-07-07
发明人： Van Loon, Machiel W. , Breebart, Dirk J. , Hotho, Gerard H. , Schuiers, Erik G. P. , Purnhagen, Heiko , Rödén, Karl J.
CPC分类号： H04S3/02 , G10L19/008 , H04S1/007 , H04S2400/03 , H04S2420/03
摘要： A method and a device for processing a stereo signal obtained from an encoder, which codes an N-channel audio signal into spatial parameters (P) and a stereo down-mix comprising first and second stereo signals (L 0 , R 0 ). A first signal and a third signal are added in order to obtain a first output signal (L 0w ), wherein the first signal QL 0wL ) comprises the first stereo signal (L 0 ) modified by a first complex function (g 1 ), and the third signal (L 0wR ) comprises the second stereo signal (R 0 ) modified by a third complex function (g 3 ). A second signal and a fourth signal are added to obtain a second output signal (R 0w ). The fourth signal (R 0wR ) comprises the second stereo signal (R 0 ) modified by a fourth complex function (g 4 ), and the second signal (R 0wL ) comprises the first stereo signal (L 0 ) modified by a second complex function (g 2 ). The complex functions (g 1 ,g 2 ,g 3 ,g 4 ) are functions of the spatial parameters (P) and are chosen such that an energy value of the difference (L 0wL -P 0wL ) between the first signal and the second signal is larger than or equal to the energy value of the sum (L 0wL +R 0wL ) of the first and the second signal and the energy value of the difference (R 0wR -L 0wR ) between the fourth signal and the third signal is larger than or equal to the energy value of the sum (R 0wR +L 0wR ) of the fourth signal and the third signal.
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公开(公告)号：EP2175671A3
公开(公告)日：2011-01-12
申请号：EP10152627.5
申请日：2005-07-07
发明人： Van Loon, Machiel W. , Breebart, Dirk J. , Hotho, Gerard H. , Schuiers, Erik G. P. , Purnhagen, Heiko , Rödén, Karl J.
CPC分类号： H04S3/02 , G10L19/008 , H04S1/007 , H04S2400/03 , H04S2420/03
摘要： A method and a device for processing a stereo signal obtained from an encoder, which codes an N-channel audio signal into spatial parameters (P) and a stereo down-mix comprising first and second stereo signals (L 0 , R 0 ). A first signal and a third signal are added in order to obtain a first output signal (L 0w ), wherein the first signal QL 0wL ) comprises the first stereo signal (L 0 ) modified by a first complex function (g 1 ), and the third signal (L 0wR ) comprises the second stereo signal (R 0 ) modified by a third complex function (g 3 ). A second signal and a fourth signal are added to obtain a second output signal (R 0w ). The fourth signal (R 0wR ) comprises the second stereo signal (R 0 ) modified by a fourth complex function (g 4 ), and the second signal (R 0wL ) comprises the first stereo signal (L 0 ) modified by a second complex function (g 2 ). The complex functions (g 1 ,g 2 ,g 3 ,g 4 ) are functions of the spatial parameters (P) and are chosen such that an energy value of the difference (L 0wL -P 0wL ) between the first signal and the second signal is larger than or equal to the energy value of the sum (L 0wL +R 0wL ) of the first and the second signal and the energy value of the difference (R 0wR -L 0wR ) between the fourth signal and the third signal is larger than or equal to the energy value of the sum (R 0wR +L 0wR ) of the fourth signal and the third signal.
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