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    METHOD, DEVICE, ENCODER APPARATUS, DECODER APPARATUS AND AUDIO SYSTEM
    1.
    发明授权
    METHOD, DEVICE, ENCODER APPARATUS, DECODER APPARATUS AND AUDIO SYSTEM 有权
    方法，装置，编码器装置，解码器装置和音频系统

    公开(公告)号：EP1769655B1

    公开(公告)日：2011-09-28

    申请号：EP05761091.7

    申请日：2005-07-07

    申请人： Koninklijke Philips Electronics N.V. ,  Dolby Sweden AB

    发明人： VAN LOON, Machiel, W. ,  BREEBAART, Dirk, J. ,  HOTHO, Gerard, H. ,  SCHUIJERS, Erik, G., P. ,  PURNHAGEN, Heiko ,  RÖDÉN, Karl, J.

    IPC分类号： H04S3/02

    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： 描述了用于处理从编码器获得的立体声信号的方法和设备，该编码器将N声道音频信号编码为包括第一和第二立体声信号（Lo，R0）的空间参数（P）和立体声下混合。 添加第一信号和第三信号以获得第一输出信号（低），其中第一信号（L0wL）包括由第一复函数（g1）修改的第一立体声信号（Lo），并且第三信号 （L0wR）包括由第三复函数（g3）修改的第二立体声信号（R0）。 第二信号和第四信号被相加以获得第二输出信号（R0w）。 第四信号（R0wR）包括由第四复合函数（g4）修改的第二立体声信号（R0），并且第二信号（R0wL）包括由第二复合函数（g2）修改的第一立体声信号（L0）。 复数函数（g1，g2，g3，g4）是空间参数（P）的函数并被选择为使得第一信号和第二信号之间的差值（L0WL-R0wL）的能量值大于 或等于第一信号与第二信号的总和（LowL + R0wL）的能量值，并且第四信号与第三信号之间的差值（R0wR-L0wR）的能量值大于或等于能量 第四信号和第三信号的总和（R0wR + L0wR）的值。

    AUDIO ENCODING AND DECODING
    3.
    发明授权
    AUDIO ENCODING AND DECODING 有权
    音频编码和解码音频

    公开(公告)号：EP1902443B1

    公开(公告)日：2009-06-03

    申请号：EP06766049.8

    申请日：2006-07-07

    申请人： Koninklijke Philips Electronics N.V. ,  Dolby Sweden AB

    发明人： SCHUIJERS, Erik, G., P. ,  HOTHO, Gerard, H. ,  PURNHAGEN, Heiko ,  SCHILDBACH, Wolfgang, A. ,  HOERICH, Holger ,  KJOERLING, Hans , M., ,  RÖDÉN, Karl,J.

    IPC分类号： G10L19/00 ,  H04S3/00

    CPC分类号： G10L19/008 ,  H04S2420/03

    摘要： An audio encoder (109) has a hierarchical encoding structure and generates a data stream comprising one or more audio channels as well as parametric audio encoding data. The encoder (109) comprises an encoding structure processor (305) which inserts decoder tree structure data into the data stream. The decoder tree structure data comprises at least one data value indicative of a channel split characteristic for an audio channel at a hierarchical layer of the hierarchical decoder structure and may specifically specify the decoder tree structures to be applied by a decoder. A decoder (115) comprises a receiver (401) which receives the data stream and a decoder structure processor (405) for generating the hierarchical decoder structure in response to the decoder tree structure data. A decode processor (403) then generates output audio channels from the data stream using the hierarchical decoder structure.

    AUDIO CHANNEL CONVERSION
    4.
    发明授权
    AUDIO CHANNEL CONVERSION 有权
    音频通道转换

    公开(公告)号：EP1769491B1

    公开(公告)日：2009-09-30

    申请号：EP05765606.8

    申请日：2005-07-11

    申请人： Koninklijke Philips Electronics N.V. ,  Dolby Sweden AB

    发明人： BREEBAART, Dirk, J. ,  SCHUIJERS, Erik, G., P. ,  PURNHAGEN, Heiko ,  RÖDÉN, Karl, J.

    IPC分类号： G10L19/00 ,  H04S5/00

    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： 一种用于将第一数量（M）的输入音频通道转换为第二较大数量（N）的输出音频通道的设备（1）包括：去相关单元（3），用于将输入音频通道分解成一组去相关的辅助通道 ，至少一个用于将解相关的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 解相关单元（3）。 预处理单元（2）和上混单元（4）优选由音频参数控制。

    ENHANCED CODING AND PARAMETER REPRESENTATION OF MULTICHANNEL DOWNMIXED OBJECT CODING
    5.
    发明授权
    ENHANCED CODING AND PARAMETER REPRESENTATION OF MULTICHANNEL DOWNMIXED OBJECT CODING 有权
    ERWEITERTE CODIERUNG UNDPARAMETERREPRÄSENTATIONEINER MEHRKANALIGEN HERUNTERGEMISCHTEN OBJEKTCODIERUNG

    公开(公告)号：EP2054875B1

    公开(公告)日：2011-03-23

    申请号：EP07818759.8

    申请日：2007-10-05

    申请人： Dolby Sweden AB

    发明人： ENGDEGARD, Jonas ,  VILLEMOES, Lars ,  PURNHAGEN, Heiko ,  RESCH, Barbara

    IPC分类号： G10L19/00

    CPC分类号： G10L19/20 ,  G10L19/008 ,  H04S3/008 ,  H04S3/02 ,  H04S5/00 ,  H04S7/30 ,  H04S2400/03 ,  H04S2400/11 ,  H04S2420/03

    摘要： An audio object coder for generating an encoded object signal using a plurality of audio objects includes a downmix information generator for generating downmix information indicating a distribution of the plurality of audio objects into at least two downmix channels, an audio object parameter generator for generating object parameters for the audio objects, and an output interface for generating the imported audio output signal using the downmix information and the object parameters. An audio synthesizer uses the downmix information for generating output data usable for creating a plurality of output channels of the predefined audio output configuration.

    摘要翻译： 一种用于使用多个音频对象产生编码对象信号的音频对象编码器包括：下混信息发生器，用于将表示多个音频对象的分布的下混信息生成到至少两个下混通道中;音频对象参数发生器，用于产生对象参数 以及用于使用缩混信息和对象参数来生成导入的音频输出信号的输出接口。 音频合成器使用下混信息来产生可用于创建预定音频输出配置的多个输出声道的输出数据。

    AUDIO SIGNAL ENCODING OR DECODING
    10.
    发明授权
    AUDIO SIGNAL ENCODING OR DECODING 有权
    音频信号编码或解码

    公开(公告)号：EP1683133B1

    公开(公告)日：2007-02-14

    申请号：EP04770333.5

    申请日：2004-10-28

    申请人： Koninklijke Philips Electronics N.V. ,  Coding Technologies AB

    发明人： VILLEMOES, Lars, F. ,  EKSTRAND, Per ,  PURNHAGEN, Heiko ,  SCHUIJERS, Erik, G., P. ,  DE BONT, Fransiscus M., J.

    IPC分类号： G10L19/00 ,  G10L21/02

    CPC分类号： G10L19/008 ,  G10L21/038

    摘要： Encoding an audio signal is provided wherein the audio signal includes a first audio channel and a second audio channel, the encoding comprising subband filtering each of the first audio channel and the second audio channel in a complex modulated filterbank to provide a first plurality of subband signals for the first audio channel and a second plurality of subband signals for the second audio channel, downsampling each of the subband signals to provide a first plurality of downsampled subband signals and a second plurality of downsampled subband signals, further subband filtering at least one of the downsampled subband signals in a further filterbank in order to provide a plurality of sub-subband signals, deriving spatial parameters from the sub-subband signals and from those downsampled subband signals that are not further subband filtered, and deriving a single channel audio signal comprising derived subband signals derived from the first plurality of downsampled subband signals and the second plurality of downsampled subband signals. Further, decoding is provided wherein an encoded audio signal comprising an encoded single channel audio signal and a set of spatial parameters is decoded by decoding the encoded single channel audio channel to obtain a plurality of downsampled subband signals, further subband filtering at least one of the downsampled subband signals in a further filterbank in order to provide a plurality of sub-subband signals, and deriving two audio channels from the spatial parameters, the sub-subband signals and those downsampled subband signals that are not further subband filtered.