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    Multi-channel hierarchical audio coding with compact side information
    2.
    发明授权
    Multi-channel hierarchical audio coding with compact side information 有权
    具有紧凑侧面信息的多通道分层音频编码

    公开(公告)号：US07961890B2

    公开(公告)日：2011-06-14

    申请号：US11314711

    申请日：2005-12-21

    申请人： Andreas Hölzer ,  Jürgen Herre ,  Heiko Purnhagen ,  Kristofer Kjörling ,  Jonas Röden ,  Lars Villemoes ,  Jonas Engdegard ,  Jeroen Breebaart ,  Erik Schuijers ,  Werner Oomen

    发明人： Andreas Hölzer ,  Jürgen Herre ,  Heiko Purnhagen ,  Kristofer Kjörling ,  Jonas Röden ,  Lars Villemoes ,  Jonas Engdegard ,  Jeroen Breebaart ,  Erik Schuijers ,  Werner Oomen

    IPC分类号： H04R5/00

    CPC分类号： G10L19/008 ,  H04S3/00 ,  H04S2420/03

    摘要： A parametric representation of a multi-channel audio signal describes the spatial properties of the audio signal well with compact side information when a coherence information, describing the coherence between a first and a second channel, is derived within a hierarchical encoding process only for channel pairs including a first channel having only information of a left side with respect to a listening position and including a second channel having only information from a right side with respect to a listening position. As within the hierarchical process the multiple audio channels of the audio signal are downmixed iteratively into monophonic channels, one can pick the relevant parameters from an encoding step involving only channel pairs carrying the information needed to describe the spatial properties of the multi-channel audio signal.

    摘要翻译： 多通道音频信号的参数化表示利用紧凑的侧信息来描述音频信号的空间属性，当描述第一和第二信道之间的相干性的相干信息仅在信道对的分级编码处理中导出时 包括仅具有相对于收听位置的左侧的信息的第一频道，并且包括仅具有相对于收听位置的右侧的信息的第二频道。 如在分层处理中，音频信号的多个音频通道被迭代地下混合成单声道，可以从仅涉及携带描述多声道音频信号的空间属性所需的信息的信道对的编码步骤中选择相关参数 。

    Envelope shaping of decorrelated signals
    3.
    发明授权
    Envelope shaping of decorrelated signals 有权
    去相关信号的信封整形

    公开(公告)号：US07983424B2

    公开(公告)日：2011-07-19

    申请号：US11402519

    申请日：2006-04-12

    申请人： Kristofer Kjörling ,  Jürgen Herre ,  Sascha Disch ,  Lars Villemoes

    发明人： Kristofer Kjörling ,  Jürgen Herre ,  Sascha Disch ,  Lars Villemoes

    IPC分类号： H04R5/00 ,  G10L19/00

    CPC分类号： H04S7/307 ,  G10L19/008 ,  G10L19/02 ,  G10L19/26 ,  H04S3/00 ,  H04S5/005 ,  H04S2420/03

    摘要： The envelope of a decorrelated signal derived from an original signal can be shaped without introducing additional distortion, when a spectral flattener is used to spectrally flatten the spectrum of the decorrelated signal and the original signal prior to using the flattened spectra for deriving a gain factor describing the energy distribution between the flattened spectra, and when the so derived gain factor is used by an envelope shaper to timely shape the envelope of the decorrelated signal.

    摘要翻译： 当原始信号得到的去相关信号的包络线可以被成形，而不引入额外的失真，当使用光谱平滑器在光谱平坦化去相关信号的频谱和原始信号之前，在使用平坦的光谱以得出描述的增益因子之前 平坦化光谱之间的能量分布，以及当衍生的增益因子被信封整形器用于及时地形成去相关信号的包络时。

    SELECTIVE BASS POST FILTER
    6.
    发明申请
    SELECTIVE BASS POST FILTER 有权
    选择性过滤器

    公开(公告)号：US20130096912A1

    公开(公告)日：2013-04-18

    申请号：US13703875

    申请日：2011-06-23

    申请人： Barbara Resch ,  Kristofer Kjörling ,  Lars Villemoes

    发明人： Barbara Resch ,  Kristofer Kjörling ,  Lars Villemoes

    IPC分类号： G10L19/26 ,  G10L19/12 ,  G10L19/125

    CPC分类号： G10L19/26 ,  G10L19/02 ,  G10L19/0212 ,  G10L19/032 ,  G10L19/09 ,  G10L19/107 ,  G10L19/12 ,  G10L19/125 ,  G10L19/20 ,  G10L19/22 ,  G10L19/265 ,  G10L21/003 ,  G10L21/007 ,  G10L21/013

    摘要： In one aspect, the invention provides an audio encoding method characterized by a decision being made as to whether the device which will decode the resulting bit stream Bitstream should apply post filtering including attenuation of interharmonic noise. Hence, the decision whether to use the post filter, which is encoded in the bit stream, is taken separately from the decision as to the most suitable coding mode. In another aspect, there is provided an audio decoding method with a decoding step followed by a post-filtering step, including interharmonic noise attenuation, and being characterized in a step of disabling the post filter in accordance with post filtering information encoded in the bit stream signal. Such a method is well suited for mixed-origin audio signals by virtue of its capability to deactivate the post filter in dependence of the post filtering information only, hence independently of factors such as the current coding mode.

    摘要翻译： 一方面，本发明提供了一种音频编码方法，其特征在于作出决定是否将解码所得比特流比特流的装置应用包括间谐波噪声衰减的后置滤波。 因此，决定是否使用在比特流中编码的后置滤波器，与最适合的编码模式的决定分开。 在另一方面，提供了一种具有解码步骤之后是后置滤波步骤的音频解码方法，包括间谐波噪声衰减，并且其特征在于根据在比特流中编码的后置滤波信息来禁用后置滤波器 信号。 这种方法凭借其根据后置滤波信息去激活后置滤波器的能力，因此独立于诸如当前编码模式的因素，非常适用于混合源音频信号。

    Selective bass post filter
    10.
    发明授权
    Selective bass post filter 有权
    选择性低音后置滤镜

    公开(公告)号：US09224403B2

    公开(公告)日：2015-12-29

    申请号：US13703875

    申请日：2011-06-23

    申请人： Barbara Resch ,  Kristofer Kjörling ,  Lars Villemoes

    发明人： Barbara Resch ,  Kristofer Kjörling ,  Lars Villemoes

    IPC分类号： G10L19/00 ,  G10L19/26 ,  G10L19/12 ,  G10L19/125 ,  G10L19/02 ,  G10L19/107 ,  G10L19/20

    CPC分类号： G10L19/26 ,  G10L19/02 ,  G10L19/0212 ,  G10L19/032 ,  G10L19/09 ,  G10L19/107 ,  G10L19/12 ,  G10L19/125 ,  G10L19/20 ,  G10L19/22 ,  G10L19/265 ,  G10L21/003 ,  G10L21/007 ,  G10L21/013

    摘要： In one aspect, the invention provides an audio encoding method characterized by a decision being made as to whether the device which will decode the resulting bit stream should apply post filtering including attenuation of interharmonic noise. Hence, the decision whether to use the post filter, which is encoded in the bit stream, is taken separately from the decision as to the most suitable coding mode. In another aspect, there is provided an audio decoding method with a decoding step followed by a post-filtering step, including interharmonic noise attenuation, and being characterized in a step of disabling the post filter in accordance with post filtering information encoded in the bit stream signal. Such a method is well suited for mixed-origin audio signals by virtue of its capability to deactivate the post filter in dependence of the post filtering information only, hence independently of factors such as the current coding mode.

    摘要翻译： 在一个方面，本发明提供了一种音频编码方法，其特征在于作出关于将对所得比特流进行解码的装置是否应该应用包括衰减间谐波噪声的后置滤波的决定。 因此，决定是否使用在比特流中编码的后置滤波器，与最适合的编码模式的决定分开。 在另一方面，提供了一种具有解码步骤之后是后置滤波步骤的音频解码方法，包括间谐波噪声衰减，并且其特征在于根据在比特流中编码的后置滤波信息来禁用后置滤波器 信号。 这种方法凭借其根据后置滤波信息去激活后置滤波器的能力，因此独立于诸如当前编码模式的因素，非常适用于混合源音频信号。