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    Filter unit and method for generating subband filter impulse responses
    1.
    发明公开
    Filter unit and method for generating subband filter impulse responses 有权
    过滤器单元和用于产生子带滤波器的脉冲响应的方法

    公开(公告)号：EP2337224A2

    公开(公告)日：2011-06-22

    申请号：EP11160966.5

    申请日：2007-07-03

    申请人： Dolby Sweden AB

    发明人： Villemoes, Lars

    IPC分类号： H03H17/02 ,  G10L19/02

    CPC分类号： H03H17/0272 ,  G10L19/0204 ,  H03H17/0266

    摘要： A filter compressor (102) for generating compressed subband filter impulse responses from input subband filter impulse responses corresponding to subbands, which comprise filter impulse response values at filter taps, comprises a processor (820) for examining the filter impulse response values from at least two input subband filter input responses to find filter impulse response values having higher values and at least one filter impulse response value having a value being lower than the higher values, and a filter impulse response constructor (305) for constructing the compressed subband filter impulse responses using the filter impulse response values having the higher values, wherein the compressed subband filter impulse responses do not include filter impulse response values corresponding to filter taps of the at least one filter impulse response value having the lower value or comprise zero-valued values corresponding to filter taps of the at least one filter impulse response value having the lower value.

    Binaural rendering of a multi-channel audio signal
    2.
    发明公开
    Binaural rendering of a multi-channel audio signal 审中-公开
    Binaurale Aufbereitung eines Mehrkanal-Audiosignals

    公开(公告)号：EP2175670A1

    公开(公告)日：2010-04-14

    申请号：EP09006598.8

    申请日：2009-05-15

    申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. ,  Koninklijke Philips Electronics N.V. ,  Dolby Sweden AB ,  Mundt, Harald ,  Terentiev, Leonid ,  Falch, Cornelia ,  Hilpert, Johannes ,  Hellmuth, Oliver ,  Plogsties, Jan ,  Villemoes, Lars ,  Breebaart, Jeroen ,  Koppens, Jeroen ,  Engdegard, Jonas

    发明人： Koppens, Jeroen ,  Mundt, Harald ,  Terentiev, Leonid ,  Falch, Cornelia ,  Hilpert, Johannes ,  Hellmuth, Oliver ,  Plogsties, Jan ,  Villemoes, Lars ,  Breebaart, Jeroen ,  Engdegard, Jonas

    IPC分类号： H04S3/00

    CPC分类号： H04S3/004 ,  G10L19/008 ,  G10L19/20 ,  H04S1/005 ,  H04S2400/01 ,  H04S2420/01 ,  H04S2420/03

    摘要： Binaural rendering a multi-channel audio signal into a binaural output signal (24) is described. The multi-channel audio signal comprises a stereo downmix signal (18) into which a plurality of audio signals are downmixed, and side information comprising a downmix information (DMG, DCLD) indicating, for each audio signal, to what extent the respective audio signal has been mixed into a first channel and a second channel of the stereo downmix signal (18), respectively, as well as object level information of the plurality of audio signals and inter-object cross correlation information describing similarities between pairs of audio signals of the plurality of audio signals. Based on a first rendering prescription, a preliminary binaural signal (54) is computed from the first and second channels of the stereo downmix signal (18). A decorrelated signal X d n , k is generated as an perceptual equivalent to a mono downmix (58) of the first and second channels of the stereo downmix signal (18) being, however, decorrelated to the mono downmix (58). Depending on a second rendering prescription P 2 1 , m , a corrective binaural signal (64) is computed from the decorrelated signal (62) and the preliminary binaural signal (54) is mixed with the corrective binaural signal (64) to obtain the binaural output signal (24).

    摘要翻译： 描述将双声道音频信号双向渲染成双耳输出信号（24）。 多声道音频信号包括立体声下混合信号（18），多个音频信号被混合到其中，并且包括下混信息（DMG，DCLD）的侧信息指示对于每个音频信号，各个音频信号 分别混合到立体声下混合信号（18）的第一通道和第二通道中，以及描述多个音频信号的对象级别信息和描述对象音频信号对之间的相似性的对象间互相关信息 多个音频信号。 基于第一渲染处方，从立体声下混合信号（18）的第一和第二声道计算初步双耳信号（54）。 产生解相关信号X d n，k作为与立体声下混信号（18）的第一和第二声道的单声道下混频（58）的感知等效，然而，与单声道下混频（58）相关。 根据第二渲染处方P 2 1，m，从去相关信号（62）计算校正性双耳信号（64），并将预备双耳信号（54）与校正性双耳信号（64）混合以获得双耳 输出信号（24）。

    Enhanced coding and parameter representation of multichannel downmixed object coding
    3.
    发明公开
    Enhanced coding and parameter representation of multichannel downmixed object coding 有权
    Verbesserte Kodierungs- und Parameterdarstellung von mehrkanaligerabwärtsgemischterObjektkodierung

    公开(公告)号：EP2068307A1

    公开(公告)日：2009-06-10

    申请号：EP09004406.6

    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 ,  H04S7/00

    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 用于音频对象，以及输出接口，用于使用下混合信息和对象参数来生成导入的音频输出信号。 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。

    Advanced processing based on a complex-exponential-modulated filterbank and adaptive time signalling methods
    5.
    发明公开
    Advanced processing based on a complex-exponential-modulated filterbank and adaptive time signalling methods 有权
    调制复指数滤波器组和自适应时间信令方法的基础上先进的加工

    公开(公告)号：EP2124485A2

    公开(公告)日：2009-11-25

    申请号：EP09009940.9

    申请日：2004-04-30

    申请人： Dolby Sweden AB

    发明人： Engdegard, Jonas ,  Villemoes, Lars

    IPC分类号： H04S3/00 ,  H04S5/00 ,  G10L19/00

    CPC分类号： G10L19/008 ,  G10L19/0204 ,  H03H17/0266 ,  H04S5/00 ,  H04S2420/03

    摘要： A synthesizer for generating a decorrelation signal using an input signal is operative on a plurality of subband signals, wherein a subband signal includes a sequence of at least two subband samples, the sequence of the subband samples representing a bandwidth of the subband signal, which is smaller than a bandwidth of the input signal. The synthesizer includes a filter stage (201) for filtering each subband signal using a reverberation filter to obtain a plurality of reverberated subband signals, wherein a plurality of reverberated subband signals together represent the decorrelation signal. This decorrelation signal is used for reconstructing a signal based on a parametrically encoded stereo signal consisting of a mono signal and a coherence measure.