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1. 发明申请

WO2015036351A1 METHODS AND DEVICES FOR JOINT MULTICHANNEL CODING 审中-公开
标题翻译：用于联合多通道编码的方法和设备
公开(公告)号：WO2015036351A1
公开(公告)日：2015-03-19
申请号：PCT/EP2014/069043
申请日：2014-09-08
申请人： DOLBY INTERNATIONAL AB
发明人： KJOERLING, Kristofer , MUNDT, Harald , PURNHAGEN, Heiko
IPC分类号： G10L19/008
CPC分类号： G10L19/008
摘要： Encoding and decoding devices for encoding the channels of an audio system having at least four channels are disclosed. The decoding device has a first stereo decoding component which subjects a first pair of input channels to a first stereo decoding, and a second stereo decoding component which subjects a second pair of input channels to a second stereo decoding. The results of the first and second stereo decoding components are crosswise coupled to a third and a fourth stereo decoding component which each performs stereo decoding on one channel resulting from the first stereo decoding component, and one channel resulting from the second stereo decoding component.
摘要翻译：公开了用于编码具有至少四个信道的音频系统的信道的编码和解码装置。解码装置具有使第一对输入通道进行第一立体声解码的第一立体声解码部件和使第二对输入通道进行第二立体声解码的第二立体声解码部件。第一和第二立体声解码部件的结果被交叉耦合到第三和第四立体声解码部件，每个立体声解码部件在由第一立体声解码部件产生的一个通道上执行立体声解码，以及由第二立体声解码部件产生的一个通道。

2. 发明申请

WO2014161992A1 AUDIO ENCODER AND DECODER 审中-公开
标题翻译：音频编码器和解码器
公开(公告)号：WO2014161992A1
公开(公告)日：2014-10-09
申请号：PCT/EP2014/056852
申请日：2014-04-04
申请人： DOLBY INTERNATIONAL AB
发明人： KJOERLING, Kristofer , PURNHAGEN, Heiko , MUNDT, Harald , ROEDEN, Karl Jonas , SEHLSTROM, Leif
IPC分类号： G10L19/008
CPC分类号： G10L19/20 , G10L19/008 , G10L19/0212 , G10L19/167 , G10L25/18 , H04S3/008 , H04S2400/03 , H04S2420/03
摘要： The present disclosure provides methods, devices and computer program products for encoding and decoding a multi-channel audio signal based on an input signal. According to the disclosure, a hybrid approach of using both parametric stereo coding and discrete representation of the processed multi-channel audio signal is used which may improve the quality of the encoded and decoded audio for certain bitrates.
摘要翻译：本公开提供了用于基于输入信号对多声道音频信号进行编码和解码的方法，设备和计算机程序产品。根据本公开，使用使用参数立体声编码和处理的多声道音频信号的离散表示的混合方法，其可以提高针对某些比特率的编码和解码的音频的质量。

3. 发明申请

WO2013124446A1 AUDIO PROCESSING 审中-公开
标题翻译：音频处理
公开(公告)号：WO2013124446A1
公开(公告)日：2013-08-29
申请号：PCT/EP2013/053610
申请日：2013-02-22
申请人： DOLBY INTERNATIONAL AB
发明人： KJOERLING, Kristofer , PURNHAGEN, Heiko , ROEDEN, Karl Jonas , SEHLSTROM, Leif , VILLEMOES, Lars
IPC分类号： G10L19/008
CPC分类号： G10L19/008 , H04S2420/03
摘要： An audio processing system (100) for spatial synthesis comprises an upmix stage (110) receiving a decoded m-channel downmix signal (X) and outputting, based thereon, an n-channel upmix signal (Y), wherein 2 ≤ m 1 , d 2 ) obtained by cross mixing and non-linear processing of the downmix signal, and further comprises a first mixing matrix (130) receiving the downmix signal and the modified downmix signal, forming an n-channel linear combination of the downmix signal channels and modified downmix signal channels only and outputting this as the n-channel upmix signal. In an embodiment, the first mixing matrix accepts one or more mixing parameters (g, α 1 ,...) controlling at least one gain in the linear combination performed by the first mixing matrix. The gains are polynomials of degree ≤2.
摘要翻译：用于空间合成的音频处理系统（100）包括接收解码的m信道下混合信号（X）的上混级（110）并基于此输出n沟道上混合信号（Y），其中2 <= m < ñ。上混级包括下混修改处理器（120），其接收m声道下混信号并输出通过下混信号的交叉混合和非线性处理获得的修改的下混合信号（d1，d2），并且还包括第一接收下混合信号和修正的下混合信号的混合矩阵（130），仅形成降混信号通道和修正的下混信号通道的n通道线性组合，并将其输出为n通道上混信号。在一个实施例中，第一混合矩阵接受控制由第一混合矩阵执行的线性组合中的至少一个增益的一个或多个混合参数（g，α1，...）。增益是度<= 2的多项式。

4. 发明申请

WO2017087650A1 HEADTRACKING FOR PARAMETRIC BINAURAL OUTPUT SYSTEM AND METHOD 审中-公开
标题翻译：参数化骨门输出系统的头部追踪及方法
公开(公告)号：WO2017087650A1
公开(公告)日：2017-05-26
申请号：PCT/US2016/062497
申请日：2016-11-17
申请人： DOLBY LABORATORIES LICENSING CORPORATION , DOLBY INTERNATIONAL AB
发明人： BREEBAART, Dirk Jeroen , COOPER, David Matthew , DAVIS, Mark F. , MCGRATH, David S. , KJOERLING, Kristofer , MUNDT, Harald , WILSON, Rhonda J.
IPC分类号： H04S3/00
CPC分类号： H04S3/004 , G10L19/008 , H04S7/304 , H04S2400/01 , H04S2400/11 , H04S2420/03
摘要： A method of encoding channel or object based input audio for playback, the method including the steps of: (a) initially rendering the channel or object based input audio into an initial output presentation; (b) determining an estimate of the dominant audio component from the channel or object based input audio and determining a series of dominant audio component weighting factors for mapping the initial output presentation into the dominant audio component; (c) determining an estimate of the dominant audio component direction or position; and (d) encoding the initial output presentation, the dominant audio component weighting factors, the dominant audio component direction or position as the encoded signal for playback.
摘要翻译：一种对用于回放的基于声道或对象的输入音频进行编码的方法，所述方法包括以下步骤：（a）最初将基于声道或基于对象的输入音频呈现为初始输出呈现; （b）从所述基于声道或基于对象的输入音频确定所述主导音频分量的估计，并确定用于将所述初始输出呈现映射到所述主导音频分量的一系列主导音频分量加权因子; （c）确定主要音频分量方向或位置的估计; （d）将初始输出呈现，主要音频分量加权因子，主要音频分量方向或位置编码为用于回放的编码信号。

5. 发明申请

WO2013186344A2 SMOOTH CONFIGURATION SWITCHING FOR MULTICHANNEL AUDIO RENDERING BASED ON A VARIABLE NUMBER OF RECEIVED CHANNELS 审中-公开
标题翻译：基于可变数量的接收频道进行多通道音频渲染的最佳配置切换
公开(公告)号：WO2013186344A2
公开(公告)日：2013-12-19
申请号：PCT/EP2013/062340
申请日：2013-06-14
申请人： DOLBY INTERNATIONAL AB
发明人： PURNHAGEN, Heiko , SEHLSTROM, Leif , ROEDEN, Karl, Jonas , KJOERLING, Kristofer , VILLEMOES, Lars
IPC分类号： G10L19/18
CPC分类号： G10L19/008 , G10L19/0017 , G10L19/18 , H04S3/008 , H04S2400/03 , H04S2420/03
摘要： A decoding system reconstructs an n-channel audio signal on the basis of an input signal representing the audio signal, in different time frames, either by parametric coding or as n discretely coded channels. Parametric decoding uses a core signal and mixing parameters controlling a spatial synthesis stage, to which a downmix signal is supplied from a downmix stage. The downmix stage realizes a projection on the downmix signal based on an n- channel input signal, either a discretely coded signal or a core signal padded with neutral-valued channels. The padding may take place either on the decoding side (reduced parametric coding) or the encoding side. In an embodiment, an audio decoder (110) in the decoding system pads the core signal during an initial portion of each reduced parametrically coded time frame directly succeeding a discretely coded time frame and during a final portion of each reduced parametrically coded time frame directly preceding a discretely coded time frame.
摘要翻译：解码系统通过参数编码或作为n个离散编码的信道，在不同的时间帧中，基于表示音频信号的输入信号来重构n信道音频信号。参数解码使用核心信号和控制空间合成阶段的混合参数，下混合信号从下混合级提供给它。下混合阶段基于n-沟道输入信号，即离散编码信号或填充有中性信道的核心信号实现对下混信号的投影。填充可以在解码侧（缩减参数编码）或编码侧进行。在一个实施例中，解码系统中的音频解码器（110）在直接在离散编码的时间帧之后的每个缩减的参数编码时间帧的初始部分期间以及在直接前进的每个缩减的参数编码时间帧的最后部分期间，离散编码的时间帧。

6. 发明申请

WO2013173080A1 SYSTEM FOR MAINTAINING REVERSIBLE DYNAMIC RANGE CONTROL INFORMATION ASSOCIATED WITH PARAMETRIC AUDIO CODERS 审中-公开
标题翻译：维护与参数音频编码器相关的可反转动态范围控制信息的系统
公开(公告)号：WO2013173080A1
公开(公告)日：2013-11-21
申请号：PCT/US2013/039344
申请日：2013-05-02
申请人： DOLBY LABORATORIES LICENSING CORPORATION , DOLBY INTERNATIONAL AB
发明人： RIEDMILLER, Jeffrey , ROEDEN, Karl, J. , KJOERLING, Kristofer , PURNHAGEN, Heiko , MELKOTE, Vinay , SEHLSTROM, Leif
IPC分类号： G10L19/008 , G10L19/18 , H03G7/00 , H03G9/00
CPC分类号： G10L19/24 , G10L19/008 , G10L19/167 , G10L19/18
摘要： On the basis of a bitstream (P), an n-channel audio signal (X) is reconstructed by deriving an m-channel core signal (Y) and multichannel coding parameters (α) from the bitstream, where 1 ≤ m
摘要翻译：基于比特流（P），通过从比特流导出m信道核心信号（Y）和多信道编码参数（α）来重构n信道音频信号（X），其中1 <= m

7. 发明申请

WO2012010494A1 PROCESSING OF AUDIO SIGNALS DURING HIGH FREQUENCY RECONSTRUCTION 审中-公开
标题翻译：音频信号在高频重建期间的处理
公开(公告)号：WO2012010494A1
公开(公告)日：2012-01-26
申请号：PCT/EP2011/062068
申请日：2011-07-14
申请人： DOLBY INTERNATIONAL AB , KJOERLING, Kristofer
发明人： KJOERLING, Kristofer
IPC分类号： G10L21/02
CPC分类号： G10L19/0017 , G10L19/0204 , G10L21/038
摘要： The application relates to HFR (High Frequency Reconstruction/Regeneration) of audio signals. In particular, the application relates to a method and system for performing HFR of audio signals having large variations in energy level across the low frequency range which is used to reconstruct the high frequencies of the audio signal. A system configured to generate a plurality of high frequency subband signals covering a high frequency interval from a plurality of low frequency subband signals is described. The system comprises means for receiving the plurality of low frequency subband signals; means for receiving a set of target energies, each target energy covering a different target interval within the high frequency interval and being indicative of the desired energy of one or more high frequency subband signals lying within the target interval; means for generating the plurality of high frequency subband signals from the plurality of low frequency subband signals and from a plurality of spectral gain coefficients associated with the plurality of low frequency subband signals, respectively; and means for adjusting the energy of the plurality of high frequency subband signals using the set of target energies.
摘要翻译：该应用涉及音频信号的HFR（高频重建/再生）。特别地，本申请涉及用于执行用于重构音频信号的高频的低频范围内的能级大变化的音频信号的HFR的方法和系统。描述了被配置为从多个低频子带信号生成覆盖高频间隔的多个高频子带信号的系统。该系统包括用于接收多个低频子带信号的装置; 用于接收一组目标能量的装置，每个目标能量覆盖高频间隔内的不同目标间隔，并且指示位于目标间隔内的一个或多个高频子带信号的期望能量; 用于分别从多个低频子带信号和与多个低频子带信号相关联的多个频谱增益系数产生多个高频子带信号的装置; 以及用于使用所述目标能量集来调整所述多个高频子带信号的能量的装置。

8. 发明申请

WO2011073201A2 SBR BITSTREAM PARAMETER DOWNMIX 审中-公开
公开(公告)号：WO2011073201A2
公开(公告)日：2011-06-23
申请号：PCT/EP2010/069651
申请日：2010-12-14
申请人： DOLBY INTERNATIONAL AB , KJOERLING, Kristofer , THESING, Robin
发明人： KJOERLING, Kristofer , THESING, Robin
IPC分类号： G10L19/00
CPC分类号： G10L19/008 , G10L21/038
摘要： The present document relates to audio decoding and/or audio transcoding. In particular, the present document relates to a scheme for efficiently decoding a number M of audio channels from a bitstream comprising a higher number N of audio channels. In this context a method and system for merging a first and a second source set of spectral band replication (SBR) parameters to a target set of SBR parameters is described. The first and second source set comprise a first and second frequency band partitioning, respectively, which are different from one another. The first source set comprises a first set of energy related values associated with frequency bands of the first frequency band partitioning. The second source set comprises a second set of energy related values associated with frequency bands of the second frequency band partitioning. The target set comprises a target energy related value associated with an elementary frequency band. The method comprises the steps of breaking up the first and the second frequency band partitioning into a joint grid comprising the elementary frequency band; assigning a first value of the first set of energy related values to the elementary frequency band; assigning a second value of the second set of energy related values to the elementary frequency band; and combining the first and second value to yield the target energy related value for the elementary frequency band.
摘要翻译：本文件涉及音频解码和/或音频转码。特别地，本文件涉及一种用于从包括较高数量N个音频信道的比特流有效地解码数量M的音频信道的方案。在本文中，描述了将频谱带复制（SBR）参数的第一和第二源集合合并到SBR参数的目标集合的方法和系统。第一和第二源组包括分别彼此不同的第一和第二频带划分。第一源组包括与第一频带划分的频带相关联的第一组能量相关值。第二源组包括与第二频带划分的频带相关联的第二组能量相关值。目标集合包括与基本频带相关联的目标能量相关值。该方法包括将第一和第二频带划分为包括基本频带的联合网格的步骤; 将第一组能量相关值的第一值分配给基本频带; 将第二组能量相关值的第二值分配给基本频带; 并且组合第一和第二值以产生基本频带的目标能量相关值。

9. 发明申请

WO2019207036A1 INTEGRATION OF HIGH FREQUENCY AUDIO RECONSTRUCTION TECHNIQUES 审中-公开
公开(公告)号：WO2019207036A1
公开(公告)日：2019-10-31
申请号：PCT/EP2019/060600
申请日：2019-04-25
申请人： DOLBY INTERNATIONAL AB
发明人： KJOERLING, Kristofer , VILLEMOES, Lars , PURNHAGEN, Heiko , EKSTRAND, Per
IPC分类号： G10L21/0388 , G10L19/02 , G10L19/24
摘要： A method for decoding an encoded audio bitstream is disclosed. The method includes receiving the encoded audio bitstream and decoding the audio data to generate a decoded lowband audio signal. The method further includes extracting high frequency reconstruction metadata and filtering the decoded lowband audio signal with an analysis filterbank to generate a filtered lowband audio signal. The method also includes extracting a flag indicating whether either spectral translation or harmonic transposition is to be performed on the audio data and regenerating a highband portion of the audio signal using the filtered lowband audio signal and the high frequency reconstruction metadata in accordance with the flag. The high frequency regeneration is performed as a post-processing operation with a delay of 3010 samples per audio channel.

10. 发明申请

WO2015038475A1 DYNAMIC RANGE CONTROL FOR A WIDE VARIETY OF PLAYBACK ENVIRONMENTS 审中-公开
标题翻译：动态范围控制广泛的播放环境变化
公开(公告)号：WO2015038475A1
公开(公告)日：2015-03-19
申请号：PCT/US2014/054592
申请日：2014-09-08
申请人： DOLBY LABORATORIES LICENSING CORPORATION , DOLBY INTERNATIONAL AB
发明人： KOPPENS, Jeroen , RIEDMILLER, Jeffrey , KJOERLING, Kristofer , GROESCHEL, Alexander , HOERICH, Holger , SEEFELDT, Alan J.
IPC分类号： H03G7/00 , G10L19/16 , H03G9/00
CPC分类号： G06F3/165 , G10L19/167 , G10L21/0324 , H03G3/3005 , H03G3/3089 , H03G7/002 , H03G7/007 , H03G9/005 , H03G9/12 , H04S1/00 , H04S7/30 , H04S2400/13
摘要： In an audio encoder, for audio content received in a source audio format, default gains are generated based on a default dynamic range compression (DRC) curve, and non-default gains are generated for a non-default gain profile. Based on the default gains and non-default gains, differential gains are generated. An audio signal comprising the audio content, the default DRC curve, and differential gains is generated. In an audio decoder, the default DRC curve and the differential gains are identified from the audio signal. Default gains are re-generated based on the default DRC curve. Based on the combination of the re-generated default gains and the differential gains, operations are performed on the audio content extracted from the audio signal.
摘要翻译：在音频编码器中，对于以源音频格式接收的音频内容，基于默认动态范围压缩（DRC）曲线生成默认增益，并且为非默认增益配置文件生成非默认增益。基于默认收益和非默认收益，产生差异收益。产生包括音频内容，默认DRC曲线和差分增益的音频信号。在音频解码器中，根据音频信号识别默认的DRC曲线和差分增益。根据默认的DRC曲线重新生成默认增益。基于重新生成的默认增益和差分增益的组合，对从音频信号提取的音频内容执行操作。

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