公开(公告)号：US20080091436A1

公开(公告)日：2008-04-17

申请号：US11571838

申请日：2005-07-11

申请人： Dirk Jeroen Breebaart ,  Erik Gosuinus Petrus Schuijers ,  Heiko Purnhagen ,  Karl Jonas Roden

发明人： Dirk Jeroen Breebaart ,  Erik Gosuinus Petrus Schuijers ,  Heiko Purnhagen ,  Karl Jonas Roden

IPC分类号： G10L21/00

CPC分类号： H04S5/005 ,  G10L19/008

摘要： A device (1) for converting a first number (M) of input audio channels into a second, larger number (N) of output audio channels comprises: decorrelation units (3) for decomposing the input audio channels into a set of decorrelated auxiliary channels, at least one upmix unit (4) for combining the decorrelated auxiliary channels into the output audio channels, and at least one pre-processing unit (2) for pre-processing the input audio channels and feeding the pre-processed input audio channels to the decorrelation units (3). The pre-processing unit (2) and the upmix unit (4) are preferably controlled by audio parameters.

摘要翻译： 用于将输入音频通道的第一数量（M）转换为第二，更大数量（N）的输出音频通道的设备（1）包括：用于将输入音频通道分解为一组去相关的辅助通道的解相关单元（3） 至少一个用于将解相关辅助通道组合成输出音频通道的上混单元（4），以及至少一个预处理单元（2），用于预处理输入音频通道并将预处理的输入音频通道馈送到 去相关单位（3）。 预处理单元（2）和上混单元（4）优选地由音频参数控制。

公开(公告)号：US20070230710A1

公开(公告)日：2007-10-04

申请号：US11571840

申请日：2005-07-07

申请人： Machiel Van Loon ,  Dirk Breebaart ,  Gerard Hotho ,  Erik Schuijers ,  Heiko Purnhagen ,  Karl Roden

发明人： Machiel Van Loon ,  Dirk Breebaart ,  Gerard Hotho ,  Erik Schuijers ,  Heiko Purnhagen ,  Karl Roden

IPC分类号： H04R5/00

CPC分类号： H04S3/02 ,  G10L19/008 ,  H04S1/007 ,  H04S2400/03 ,  H04S2420/03

摘要： A method and a device are described for processing a stereo signal obtained from an encoder, which encodes an N-channel audio signal into spatial parameters (P) and a stereo down-mix comprising first and second stereo signals (Lo, R0). A first signal and a third signal are added in order to obtain a first output signal (Low), wherein the first signal (L0wL) comprises the first stereo signal (Lo) modified by a first complex function (g1), and the third signal (L0wR) comprises the second stereo signal (R0) modified by a third complex function (g3). A second signal and a fourth signal are added to obtain a second output signal (R0w). The fourth signal (R0wR) comprises the second stereo signal (R0) modified by a fourth complex function (g4), and the second signal (R0wL)comprises the first stereo signal (L0) modified by a second complex function (g2). The complex functions (g1, g2, g3, g4) are functions of the spatial parameters (P) and are chosen to be such that an energy value of the difference (L0WL−R0wL) between the first signal and the second signal is larger than or equal to the energy value of the sum (L0wL+R0wL) of the first and the second signal, and the energy value of the difference (R0wR−L0wR) between the fourth signal and the third signal is larger than or equal to the energy value of the sum (R0wR+L0wR) of the fourth signal and the third signal.