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1. 发明公开

EP2175670A1 Binaural rendering of a multi-channel audio signal 审中-公开
标题翻译： 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）。

2. 发明申请

WO2010012478A3 SIGNAL GENERATION FOR BINAURAL SIGNALS 审中-公开
标题翻译：信号信号的信号生成
公开(公告)号：WO2010012478A3
公开(公告)日：2010-04-08
申请号：PCT/EP2009005548
申请日：2009-07-30
申请人： FRAUNHOFER GES FORSCHUNG , MUNDT HARALD , NEUGEBAUER BERNHARD , HILPERT JOHANNES , SILZLE ANDREAS , PLOGSTIES JAN
发明人： MUNDT HARALD , NEUGEBAUER BERNHARD , HILPERT JOHANNES , SILZLE ANDREAS , PLOGSTIES JAN
IPC分类号： H04S3/00 , G10K15/12 , H04S7/00
CPC分类号： H04S3/004 , H04S7/30 , H04S2400/01 , H04S2420/01
摘要： A device for generating a binaural signal based on a multi-channel signal representing a plurality of channels and intended for reproduction by a speaker configuration having a virtual sound source position associated to each channel, is described. It comprises a correlation reducer for differently processing, and thereby reducing a correlation between, at least one of a left and a right channel of the plurality of channels, a front and a rear channel of the plurality of channels, and a center and a non-center channel of the plurality of channels, in order to obtain an inter-similarity reduced set of channels; a plurality of directional filters, a first mixer for mixing outputs of the directional filters modeling the acoustic transmission to the first ear canal of the listener, and a second mixer for mixing outputs of the directional filters modeling the acoustic transmission to the second ear canal of the listener. According to another aspect, a center level reduction for forming the downmix for a room processor is performed. According to even another aspect, an inter-similarity decreasing set of head-related transfer functions is formed.
摘要翻译：描述了一种用于基于表示多个信道并且由具有与每个信道相关联的虚拟声源位置的扬声器配置再现的多声道信号产生双耳信号的装置。它包括用于不同处理的相关减法器，从而减少多个通道中的左通道和右通道中的至少一个，多个通道的前通道和后通道之间的相关性，以及中心和非所述多个信道的中心信道，以便获得相互相似性减小的信道集合; 多个定向滤波器，用于混合将声学传播建模到收听者的第一耳道的方向滤波器的输出的第一混合器和用于混合将声学传播建模到第二耳道的方向滤波器的输出的第二混合器，听众。根据另一方面，执行用于形成室内处理器的下混合的中心水平降低。根据另一方面，形成头相关传递函数的相互相似性减小集合。

3. 发明申请

WO2008125322A1 ERZEUGUNG DEKORRELIERTER SIGNALE 审中-公开
标题翻译：去相关信号的产生
公开(公告)号：WO2008125322A1
公开(公告)日：2008-10-23
申请号：PCT/EP2008/002945
申请日：2008-04-14
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , HERRE, Jürgen , LINZMEIER, Karsten , POPP, Harald , PLOGSTIES, Jan , MUNDT, Harald , DISCH, Sascha
发明人： HERRE, Jürgen , LINZMEIER, Karsten , POPP, Harald , PLOGSTIES, Jan , MUNDT, Harald , DISCH, Sascha
IPC分类号： H04S5/00 , H04S1/00
CPC分类号： H04S5/00 , H04S1/002 , H04S2420/03 , H04S2420/05
摘要： Bei transienten Audio-Eingangssignale werden in einer Mehrkanal-Audio-Rekonstruktion unkorrelierte Ausgangssignale von einem Audio-Eingangssignal dadurch erzeugt, dass das Audio-Eingangssignal mit einer um eine Verzögerungszeit verzögerten Repräsentation des Audio-Eingangssignals so gemischt wird, dass in einem ersten Zeitintervall ein erstes Ausgangssignal dem Audio-Eingangssignal und ein zweites Ausgangssignal der verzögerten Repräsentation des Audio-Eingangssignals entspricht, wobei in einem zweiten Zeitintervall das erste Ausgangssignal der verzögerten Repräsentation des Audio-Eingangssignals und das zweite Ausgangssignal dem Audio-Eingangssignal entspricht.
摘要翻译：当在多声道音频重构不相关的输出信号的瞬态音频输入信号由音频输入信号生成的特征在于，与由混合的音频输入信号的延迟时间表示一个延迟所述音频输入信号，使得在第一时间间隔的第一输出信号对应于所述音频输入信号和第二输出信号输出到音频输入信号的延迟表示，其中在一个第二时间间隔，所述音频输入信号的所述延迟表示和第二输出信号的第一输出对应于该音频输入信号。

4. 发明申请

WO2012158333A1 FORENSIC DETECTION OF PARAMETRIC AUDIO CODING SCHEMES 审中-公开
标题翻译：参考音频编码方案的审查
公开(公告)号：WO2012158333A1
公开(公告)日：2012-11-22
申请号：PCT/US2012/035785
申请日：2012-04-30
申请人： DOLBY LABORATORIES LICENSING CORPORATION , DOLBY INTERNATIONAL AB , MUNDT, Harald, H. , BISWAS, Arijit , RADHAKRISHNAN, Regunathan
发明人： MUNDT, Harald, H. , BISWAS, Arijit , RADHAKRISHNAN, Regunathan
IPC分类号： G10L19/00 , G10L21/02
CPC分类号： G10L19/00 , G10L19/008 , G10L21/02 , G10L21/038 , G10L25/03
摘要： The present document relates to audio forensics, notably the blind detection of traces of parametric audio encoding / decoding. In particular, the present document relates to the detection of parametric frequency extension audio coding, such as spectral band replication (SBR) or spectral extension (SPX), from uncompressed waveforms such as PCM (pulse code modulation) encoded waveforms. A method for detecting frequency extension coding history in a time domain audio signal is described. The method may comprise transforming the time domain audio signal into a frequency domain, thereby generating a plurality of subband signals in a corresponding plurality of subbands comprising low and high frequency subbands; determining a degree of relationship between subband signals in the low frequency subbands and subband signals in the high frequency subbands; wherein the degree of relationship is determined based on the plurality of subband signals; and determining frequency extension coding history if the degree of relationship is greater than a relationship threshold.
摘要翻译：本文件涉及音频取证，特别是盲目检测参数音频编码/解码的痕迹。特别地，本文件涉及从诸如PCM（脉冲编码调制）编码波形的未压缩波形检测参数频率扩展音频编码，例如频谱带复制（SBR）或频谱扩展（SPX）。描述了用于检测时域音频信号中的频率扩展编码历史的方法。该方法可以包括将时域音频信号变换成频域，从而在包括低频和高频子带的相应多个子带中产生多个子带信号; 确定低频子带中的子带信号与高频子带中的子带信号之间的关系程度; 其中所述关系度基于所述多个子带信号来确定; 以及如果所述关系度大于关系阈值，则确定频率扩展编码历史。

5. 发明申请

WO2012152764A1 METHOD AND ENCODER FOR PROCESSING A DIGITAL STEREO AUDIO SIGNAL 审中-公开
标题翻译：用于处理数字立体声音频信号的方法和编码器
公开(公告)号：WO2012152764A1
公开(公告)日：2012-11-15
申请号：PCT/EP2012/058391
申请日：2012-05-07
申请人： DOLBY INTERNATIONAL AB , SCHUG, Michael , MUNDT, Harald
发明人： SCHUG, Michael , MUNDT, Harald
IPC分类号： G10L19/00 , G10L19/02
CPC分类号： H04S1/007 , G10L19/008 , G10L19/03
摘要： The invention discloses a method and an encoder for processing a digital audio stereo signal. A digital audio encoder for coding such audio signal comprises a predictive Temporal Noise Shaping (TNS) filter, a Mid-/Side (M/S) coding unit, a control unit for determining a first prediction gain related to the unmodified L/R signal processed by the TNS filter and for determining a second prediction gain related to the M/S-coded L/R signal processed by the TNS filter, wherein the control unit is adapted to disable TNS-filtering - i.e. to bypass the TNS filter - for a current signal frame, if the first and second prediction gains differ by more than a pre-determined mismatch range. Preferably, the first and second prediction gains are determined from signal energy ratios calculated for each channel of the stereo signal including the signal energies of both the TNS-processed (unmodified) L- respectively (unmodified) R-signal and the TNS-processed M/S coded L- respectively M/S coded R-signal divided by the respective signal energies before TNS processing. Furthermore, the control unit is preferably adapted to overrule the disabling of the TNS filter, if the input signal is a near-mono audio signal exhibiting only low energy either in its M- or S-band. In that case, operation of the TNS filter on the stereo audio signal is maintained.
摘要翻译：本发明公开了一种用于处理数字音频立体声信号的方法和编码器。用于对这种音频信号进行编码的数字音频编码器包括预测时间噪声整形（TNS）滤波器，中/侧（M / S）编码单元，用于确定与未修改的L / R信号相关的第一预测增益的控制单元由TNS滤波器处理并确定与由TNS滤波器处理的M / S编码的L / R信号相关的第二预测增益，其中该控制单元用于禁用TNS滤波，即绕过TNS滤波器，以用于如果第一和第二预测增益差超过预定的失配范围，则当前信号帧。优选地，第一和第二预测增益是根据对包括TNS处理（未修改）L信号和TNS处理的M信号的两个信号能量的立体声信号的每个信道计算的信号能量比确定的 / S编码的L-分别M / S编码的R信号除以TNS处理之前的各个信号能量。此外，如果输入信号是在其M波段或S波段中仅表现出低能量的近乎单声道的音频信号，则控制单元优选地适用于推翻TNS滤波器的禁用。在这种情况下，维持TNS滤波器对立体声音频信号的操作。

6. 发明申请

WO2006094635A1 VORRICHTUNG UND VERFAHREN ZUM ERZEUGEN EINES CODIERTEN STEREO-SIGNALS EINES AUDIOSTÜCKS ODER AUDIODATENSTROMS 审中-公开
标题翻译：装置和方法用于生成音频部件或音频数据流的编码立体声信号
公开(公告)号：WO2006094635A1
公开(公告)日：2006-09-14
申请号：PCT/EP2006/001622
申请日：2006-02-22
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , PLOGSTIES, Jan , MUNDT, Harald , POPP, Harald
发明人： PLOGSTIES, Jan , MUNDT, Harald , POPP, Harald
IPC分类号： H04S3/00 , G10L19/00
CPC分类号： H04S3/004 , H04S2400/01 , H04S2420/03
摘要： Eine Vorrichtung zum Erzeugen eines codierten Stereo-Signals aus einer Multikanal-Darstellung umfasst einen Multikanal-Decodierer (11), der aus wenigstens einem Basiskanal und Parameterinformationen drei oder mehr Multi-Kanäle erzeugt. Die drei oder mehr Multi-Kanäle werden Kopfhörer-Signalverarbeitung (12) unterzogen, um einen uncodierten ersten Stereo-Kanal und einen uncodierten zweiten Stereo-Kanal zu erzeugen, welche dann einem Stereo-Codierer (13) zugeführt werden, um ausgangsseitig eine codierte Stereo-Datei zu erzeugen. Die codierte Stereo-Datei kann jedem geeigneten Wiedergabegerät in Form eines CD-Players oder eines Hardware-Players zugeführt werden, sodass ein Benutzer des Wiedergabegeräts nicht nur einen normalen Stereo-Eindruck erhält, sondern einen Multi-Kanal-Eindruck bekommt.
摘要翻译：用于从多声道表示生成编码的立体声信号的装置包括用于从至少一个基本信道和参数信息，三个或更多个多路生成多声道解码器（11）。所述三个或更多的多通道进行耳机信号处理（12）来创建一个未编码的第一立体声通道和一个未编码的第二立体声声道然后将其馈送到立体声编码器（13）输出到输出侧的编码立体声创建文件。所编码的立体声文件可以在CD播放机或一个硬件播放器的形式被提供给任何合适的再现装置，使得再现装置的用户不仅接收一个普通的立体声印象，但得到的多通道的印象。

7. 发明申请

WO2012146757A1 EFFICIENT CONTENT CLASSIFICATION AND LOUDNESS ESTIMATION 审中-公开
标题翻译：有效内容分类和LOUDNESS估计
公开(公告)号：WO2012146757A1
公开(公告)日：2012-11-01
申请号：PCT/EP2012/057856
申请日：2012-04-27
申请人： DOLBY INTERNATIONAL AB , MUNDT, Harald , BISWAS, Arijit , MEISSNER, Rolf
发明人： MUNDT, Harald , BISWAS, Arijit , MEISSNER, Rolf
IPC分类号： G10L19/14
CPC分类号： G10L25/93 , G10L19/167 , G10L19/24 , G10L2025/783
摘要： Efficient Content Classification and Gated Loudness Estimation The present document relates to methods and systems for encoding an audio signal. The method comprises determining a spectral representation of the audio signal. The determining a spectral representation step may comprise determining modified discrete cosine transform, MDCT, coefficients, or a Quadrature Mirror Filter, QMF, filter bank representation of the audio signal. The method further comprises encoding the audio signal using the determined spectral representation; and classifying parts of the audio signal to be speech or non-speech based on the determined spectral representation. Finally, a loudness measure for the audio signal based on the speech parts is determined.
摘要翻译：高效内容分类和门控响度估计本文件涉及用于编码音频信号的方法和系统。该方法包括确定音频信号的频谱表示。确定频谱表示步骤可以包括确定音频信号的修正离散余弦变换，MDCT，系数或正交镜像滤波器QMF滤波器组表示。该方法还包括使用所确定的频谱表示对音频信号进行编码; 以及基于所确定的频谱表示将音频信号的部分分类为语音或非语音。最后，确定基于语音部分的音频信号的响度测量。

8. 发明申请

WO2010040456A1 BINAURAL RENDERING OF A MULTI-CHANNEL AUDIO SIGNAL 审中-公开
标题翻译：多通道音频信号的双向渲染
公开(公告)号：WO2010040456A1
公开(公告)日：2010-04-15
申请号：PCT/EP2009/006955
申请日：2009-09-25
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , KONINKLIJKE PHILIPS ELECTRONICS N.V. , DOLBY SWEDEN AB , KOPPENS, Jeroen , MUNDT, Harald , TERENTIEV, Leonid , FALCH, Cornelia , HILPERT, Johannes , HELLMUTH, Oliver , VILLEMOES, Lars , PLOGSTIES, Jan , BREEBAART, Jeroen , ENGDEGARD, Jonas
发明人： KOPPENS, Jeroen , MUNDT, Harald , TERENTIEV, Leonid , FALCH, Cornelia , HILPERT, Johannes , HELLMUTH, Oliver , VILLEMOES, Lars , PLOGSTIES, Jan , BREEBAART, Jeroen , ENGDEGARD, Jonas
IPC分类号： H04S3/00 , H04S1/00
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 n,k d) 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 (P2 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：描述了将双声道音频信号呈双耳形成双耳输出信号（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，在多大程度上相应的音频信号分别混合到立体声下混合信号（18）的第一频道和第二频道中，以及多个音频信号的对象级信息和描述对象间互相关信息，描述了对多个音频信号。基于第一渲染处方，从立体声下混信号（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（Xn，kd）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（P21，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）与校正双耳信号（64）混合以获得双耳输出信号（24）。

9. 发明申请

WO2011110525A1 SYSTEM FOR COMBINING LOUDNESS MEASUREMENTS IN A SINGLE PLAYBACK MODE 审中-公开
标题翻译：用于在单回放模式下组合舒适度测量的系统
公开(公告)号：WO2011110525A1
公开(公告)日：2011-09-15
申请号：PCT/EP2011/053389
申请日：2011-03-07
申请人： DOLBY INTERNATIONAL AB , DOLBY LABORATORIES LICENSING CORPORATION , WOLTERS, Martin , SCHUG, Michael , MUNDT, Harald, H. , RIEDMILLER, Jeffrey, C.
发明人： WOLTERS, Martin , SCHUG, Michael , MUNDT, Harald, H. , RIEDMILLER, Jeffrey, C.
IPC分类号： H03G9/00 , H03G9/14
CPC分类号： H03G9/00 , H03G9/005 , H03G9/14
摘要： The present document relates to processing of multimedia data, notably the encoding, the transmission, the decoding and the rendering of multimedia data, e.g. audio files or bitstreams. In particular, the present document relates to the implementation of loudness control in multimedia players. A method for providing loudness related data to a media player is described. The method comprises the steps of providing a first loudness related value associated with an audio signal; wherein the first loudness related value has been determined according to a first procedure; of converting the first loudness related value into a second loudness related value using a reversible relation; wherein the second loudness related value is associated with a second procedure for determining loudness related values; of storing the second loudness related value in metadata associated with the audio signal; and of providing the metadata to the media player.
摘要翻译：本文件涉及多媒体数据的处理，特别是多媒体数据的编码，传输，解码和呈现，例如，音频文件或比特流。特别地，本文件涉及多媒体播放器中的响度控制的实现。描述了一种用于向媒体播放器提供响度相关数据的方法。该方法包括以下步骤：提供与音频信号相关联的第一响度相关值; 其中所述第一响度相关值已经根据第一过程确定; 使用可逆关系将第一响度相关值转换为第二响度相关值; 其中所述第二响度相关值与用于确定响度相关值的第二过程相关联; 将第二响度相关值存储在与音频信号相关联的元数据中; 并向媒体播放器提供元数据。

10. 发明申请

WO2011100155A1 SYSTEM AND METHOD FOR NON-DESTRUCTIVELY NORMALIZING LOUDNESS OF AUDIO SIGNALS WITHIN PORTABLE DEVICES 审中-公开
标题翻译：音频信号在便携式设备中的非正规化标准化的系统和方法
公开(公告)号：WO2011100155A1
公开(公告)日：2011-08-18
申请号：PCT/US2011/023531
申请日：2011-02-03
申请人： DOLBY LABORATORIES LICENSING CORPORATION , DOLBY INTERNATIONAL AB , RIEDMILLER, Jeffrey C. , MUNDT, Harald H. , SCHUG, Michael , WOLTERS, Martin
发明人： RIEDMILLER, Jeffrey C. , MUNDT, Harald H. , SCHUG, Michael , WOLTERS, Martin
IPC分类号： G10L19/14 , H03G7/00
CPC分类号： G10L19/22 , G10L19/02 , G10L19/0208 , G10L19/167 , G10L19/26 , H03G3/3089 , H03G3/32 , H03G7/007
摘要： Many portable playback devices cannot decode and playback encoded audio content having wide bandwidth and wide dynamic range with consistent loudness and intelligibility unless the encoded audio content has been prepared specially for these devices. This problem can be overcome by including with the encoded content some metadata that specifies a suitable dynamic range compression profile by either absolute values or differential values relative to another known compression profile. A playback device may also adaptively apply gain and limiting to the playback audio. Implementations in encoders, in transcoders and in decoders are disclosed.
摘要翻译：许多便携式播放设备不能解码和播放具有宽带宽和宽动态范围的编码音频内容，具有一致的响度和清晰度，除非编码音频内容已经为这些设备专门准备。通过使用编码的内容包含一些通过相对于另一已知压缩简档的绝对值或差分值来指定合适的动态范围压缩简档的元数据来克服该问题。播放装置还可以自适应地对播放音频应用增益和限制。公开了在编码器，代码转换器和解码器中的实现。

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