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11. 发明申请

WO2006108462A1 MULTI-CHANNEL HIERARCHICAL AUDIO CODING WITH COMPACT SIDE-INFORMATION 审中-公开
标题翻译：多通道分层音频编码与紧凑的信息
公开(公告)号：WO2006108462A1
公开(公告)日：2006-10-19
申请号：PCT/EP2006/000875
申请日：2006-02-01
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , CODING TECHNOLOGIES AB , KONINKLIJKE PHILIPS ELECTRONICS N.V. , HOELZER, Andreas , HERRE, Juergen , ROEDEN, Jonas , PURNHAGEN, Heiko , KJOERLING, Kristofer , ENGDEGARD, Jonas , BREEBAART, Jeroen , SCHUIJERS, Erik , OOMEN, Werner , VILLEMOES, Lars
发明人： HOELZER, Andreas , HERRE, Juergen , ROEDEN, Jonas , PURNHAGEN, Heiko , KJOERLING, Kristofer , ENGDEGARD, Jonas , BREEBAART, Jeroen , SCHUIJERS, Erik , OOMEN, Werner , VILLEMOES, Lars
IPC分类号： G10L19/00 , H04S3/00
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。

12. 发明申请

WO2006048226A1 STEREO COMPATIBLE MULTI-CHANNEL AUDIO CODING 审中-公开
标题翻译：立体声兼容多通道音频编码
公开(公告)号：WO2006048226A1
公开(公告)日：2006-05-11
申请号：PCT/EP2005/011663
申请日：2005-10-31
申请人： CODING TECHNOLOGIES AB , KONINKLIJKE PHILIPS ELECTRONICS N.V. , PURNHAGEN, Heiko , BREEBAART, Jeroen , SCHUIJERS, Erik , VILLEMOES, Lars , RÖDEN, Jonas , ENGDEGARD, Jonas
发明人： PURNHAGEN, Heiko , BREEBAART, Jeroen , SCHUIJERS, Erik , VILLEMOES, Lars , RÖDEN, Jonas , ENGDEGARD, Jonas
IPC分类号： G10L19/00
CPC分类号： G10L19/008
摘要： A parametric representation (12) of a multi-channel audio signal having parameters suited to be used together with a monophonic downmix signal to calculate a reconstruction of the multi-channel audio signal can efficiently be derived in a stereo-backwards compatible way when a parameter combiner (18) is used to generate the parametric representation (12) by combining one or more spatial parameters (20) and a stereo parameter (22) resulting in a parametric representation (12) having a decoder usable stereo parameter (24) and an information on the one or more spatial parameters (26) that represents, together with the decoder usable stereo parameter (24) , the one or more spatial parameters (20).
摘要翻译：具有适合与单声道下混合信号一起使用以计算多声道音频信号的重构的参数的多声道音频信号的参数表示（12）可以以立体声向后兼容的方式有效地导出，当参数组合器（18）用于通过组合一个或多个空间参数（20）和立体声参数（22）来产生参数表示（12），导致具有解码器可用立体声参数（24）的参数表示（12）和与所述解码器可用立体参数（24）一起表示所述一个或多个空间参数（20）的一个或多个空间参数（26）的信息。

13. 发明申请

WO2005101370A1 APPARATUS AND METHOD FOR GENERATING A LEVEL PARAMETER AND APPARATUS AND METHOD FOR GENERATING A MULTI-CHANNEL REPRESENTATION 审中-公开
标题翻译：用于产生水平参数的装置和方法以及用于产生多通道代表的装置和方法
公开(公告)号：WO2005101370A1
公开(公告)日：2005-10-27
申请号：PCT/EP2005/003848
申请日：2005-04-12
申请人： CODING TECHNOLOGIES AB , PURNHAGEN, Heiko , VILLEMOES, Lars , ENGDEGARD, Jonas , RÖDÉN, Jonas , KJÖRLING, Kristofer
发明人： PURNHAGEN, Heiko , VILLEMOES, Lars , ENGDEGARD, Jonas , RÖDÉN, Jonas , KJÖRLING, Kristofer
IPC分类号： G10L19/00
CPC分类号： H04R5/00 , G10L19/008 , G10L19/0204 , G10L19/032 , G10L19/167 , G10L19/26 , H04S3/02 , H04S5/00 , H04S2400/01 , H04S2400/03
摘要： A parameter representation of a multi-channel signal having several original channels includes a parameter set, which, when used together with at least one down-mix channel al-lows a multi-channel reconstruction. An additional level parameter (rM) is calculated such that an energy of the at least one downmix channel weighted by the level parameter is equal to a sum of energies of the original channels. The additional level parameter is transmitted to a multi-channel reconstructor together with the parameter set or together with a down-mix channel. An apparatus for generat-ing a multi-channel representation uses the level parameter to correct (902) the energy of the at least one transmitted down-mix channel before entering the down-mix signal into an up-mixer or within the up-mixing process.
摘要翻译：具有几个原始信道的多信道信号的参数表示包括参数集合，当与至少一个缩减混合信道一起使用时，多参数集合降低多信道重构。计算附加电平参数（rM），使得由电平参数加权的至少一个下混通道的能量等于原始通道的能量之和。附加电平参数与参数组一起发送到多通道重构器，或与降混频道一起发送。用于产生多通道表示的装置使用电平参数来校正（902）至少一个发送的下混频道的能量，然后再将上混合信号进入上混频器或在上混频处理。

14. 发明申请

WO2012034890A1 CROSS PRODUCT ENHANCED SUBBAND BLOCK BASED HARMONIC TRANSPOSITION 审中-公开
标题翻译：交叉产品增强基于块的谐波传输
公开(公告)号：WO2012034890A1
公开(公告)日：2012-03-22
申请号：PCT/EP2011/065318
申请日：2011-09-05
申请人： DOLBY INTERNATIONAL AB , VILLEMOES, Lars
发明人： VILLEMOES, Lars
IPC分类号： G10L21/02 , G10L21/04
CPC分类号： G10L19/0208 , G10L19/025 , G10L19/265 , G10L21/038 , G10L21/04 , H03G3/00 , H03G3/3089
摘要： The invention provides an efficient implementation of cross-product enhanced high-frequency reconstruction (HFR), wherein a new component at frequency QΩ + Ω q is generated on the basis of existing components at Ω and QΩ + Ω q. The invention provides a block-based harmonic transposition, wherein a time block of complex subband samples is processed with a common phase modification. Superposition of several modified samples has the net effect of limiting undesirable intermodulation products, thereby enabling a coarser frequency resolution and/or lower degree of oversampling to be used. In one embodiment, the invention further includes a window function suitable for use with block-based cross-product enhanced HFR. A hardware embodiment of the invention may include an analysis filter bank (101), a subband processing unit (102) configurable by control data (104) and a synthesis filter bank (103).
摘要翻译：本发明提供了跨产品增强型高频重构（HFR）的有效实现，其中基于O和QO + Oq上的现有组件生成频率为QO + Oq的新分量。本发明提供了一种基于块的谐波转置，其中复共子带样本的时间块以公共相位修改进行处理。几个修改样品的叠加具有限制不期望的互调产物的净效应，从而使得可以使用更粗糙的频率分辨率和/或较低的过采样度。在一个实施例中，本发明还包括适用于基于块的交叉产品增强型HFR的窗函数。本发明的硬件实施例可以包括分析滤波器组（101），可由控制数据（104）和合成滤波器组（103）配置的子带处理单元（102）。

15. 发明申请

WO2011110499A1 APPARATUS AND METHOD FOR PROCESSING AN AUDIO SIGNAL USING PATCH BORDER ALIGNMENT 审中-公开
标题翻译：使用PATCH边界对齐处理音频信号的装置和方法
公开(公告)号：WO2011110499A1
公开(公告)日：2011-09-15
申请号：PCT/EP2011/053313
申请日：2011-03-04
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , DOLBY INTERNATIONAL AB , VILLEMOES, Lars , EKSTRAND, Per , DISCH, Sascha , NAGEL, Frederik , WILDE, Stephan
发明人： VILLEMOES, Lars , EKSTRAND, Per , DISCH, Sascha , NAGEL, Frederik , WILDE, Stephan
IPC分类号： G10L21/02 , G10L21/04 , G10L19/02
CPC分类号： G10L19/008 , G10L19/0204 , G10L21/038 , G10L21/04
摘要： Apparatus for processing an audio signal to generate a bandwidth extended signal having a high frequency part and a low frequency part using parametric data for the high frequency part, the parametric data relating to frequency bands of the high frequency part comprises a patch border calculator (2302) for calculating a patch border such that the patch border coincides with a frequency band border of the frequency bands. The apparatus further comprises a patcher (2312) for generating a patched signal using the audio signal (2300) and the patch border.
摘要翻译：用于处理音频信号以使用高频部分的参数数据产生具有高频部分和低频部分的带宽扩展信号的装置，与高频部分的频带有关的参数数据包括片段边界计算器（2302 ），用于计算补丁边界，使得补丁边界与频带的频带边界一致。该装置还包括一个修补器（2312），用于使用该音频信号（2300）和该贴片边界产生一个修补信号。

16. 发明申请

WO2010136459A1 EFFICIENT COMBINED HARMONIC TRANSPOSITION 审中-公开
标题翻译：有效的组合谐波传输
公开(公告)号：WO2010136459A1
公开(公告)日：2010-12-02
申请号：PCT/EP2010/057176
申请日：2010-05-25
申请人： DOLBY INTERNATIONAL AB , EKSTRAND, Per , VILLEMOES, Lars , HEDELIN, Per
发明人： EKSTRAND, Per , VILLEMOES, Lars , HEDELIN, Per
IPC分类号： G10L21/02 , G10L21/04
CPC分类号： G10H1/0091 , G10H1/125 , G10H2210/311 , G10L19/265 , G10L21/038 , G10L21/0388
摘要： The present document relates to audio coding systems which make use of a harmonic transposition method for high frequency reconstruction (HFR), and to digital effect processors, e.g. so-called exciters, where generation of harmonic distortion adds brightness to the processed signal. In particular; a system configured to generate a high frequency component of a signal from a low frequency component of the signal is described, The system may comprise an analysis filter bank (501) configured to provide a set of analysis subband signals from the low frequency component of the signal; wherein the set of analysis subband signals comprises at least two analysis subband signals; wherein the analysis filter bank (501) has a frequency resolution of Δ f , The system further comprises a nonlinear processing unit (502) configured to determine a set of synthesis subband signals from the set of analysis subband signals using a transposition order P ; wherein the set of synthesis subband signals comprises a portion of the set of analysis subband signals phase shifted by an amount derived from the transposition order P ; and a synthesis filter bank (504) configured to generate the high frequency component of the signal from the set of synthesis subband signals; wherein the synthesis filter bank (504) has a frequency resolution of F Δ f ; with F being a resolution factor, with F ≥1; wherein the transposition order P is different from the resolution factor F .
摘要翻译：本文件涉及利用用于高频重构（HFR）的谐波转置方法的音频编码系统以及数字效果处理器，例如，所谓的兴奋剂，其中谐波失真的产生增加处理信号的亮度。尤其是; 描述了被配置为从信号的低频分量产生信号的高频分量的系统。系统可以包括分析滤波器组（501），其被配置为提供来自所述信号的低频分量的一组分析子带信号信号; 其中所述一组分析子带信号包括至少两个分析子带信号; 其中所述分析滤波器组（501）具有Δf的频率分辨率。所述系统还包括非线性处理单元（502），其被配置为使用转置顺序P从所述一组分析子带信号中确定一组合成子带信号; 其中所述合成子带信号集合包括所述一组分析子带信号的一部分，所述分析子带信号的相位偏移量是从所述置换顺序P导出的量; 以及合成滤波器组（504），被配置为从所述合成子带信号的集合生成所述信号的高频分量; 其中所述合成滤波器组（504）具有F ff的频率分辨率; F为解析因子，F = 1; 其中转置次数P与分辨率因子F不同

17. 发明申请

WO2011110594A1 AUDIO SIGNAL DECODER, AUDIO SIGNAL ENCODER, METHOD FOR DECODING AN AUDIO SIGNAL, METHOD FOR ENCODING AN AUDIO SIGNAL AND COMPUTER PROGRAM USING A PITCH-DEPENDENT ADAPTATION OF A CODING CONTEXT 审中-公开
标题翻译：音频信号解码器，音频信号编码器，用于解码音频信号的方法，用于编码音频信号的方法和使用与编码语境相关的适应性的计算机程序
公开(公告)号：WO2011110594A1
公开(公告)日：2011-09-15
申请号：PCT/EP2011/053541
申请日：2011-03-09
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , DOLBY INTERNATIONAL AB , BAYER, Stefan , BÄCKSTRÖM, Tom , GEIGER, Ralf , EDLER, Bernd , DISCH, Sascha , VILLEMOES, Lars
发明人： BAYER, Stefan , BÄCKSTRÖM, Tom , GEIGER, Ralf , EDLER, Bernd , DISCH, Sascha , VILLEMOES, Lars
IPC分类号： G10L21/04
CPC分类号： G10L19/022 , G10L19/0212 , G10L25/90
摘要： An audio signal decoder (150 for providing a decoded audio signal representation (154) on the basis of an encoded audio signal representation (152) comprising an encoded spectrum representation (ac_spectral_data[]) and an encoded time warp information (tw_data[]) comprises a context-based spectral value decoder (160) configured to decode a codeword (acod_m) describing one or more spectral values or at least a portion (m) of a number representation of one or more spectral values in dependence on a context state, to obtain decoded spectral values (162, 297, x_ac_dec[]). The audio signal decoder also comprises a context state determinator (170) configured to determine a current context state (164, c) in dependence on one or more previously decoded spectral values (162, 297). The audio signal decoder also comprises a time warping frequency-domain-to-time-domain converter (180) configured to provide a time-warped time-domain representation (182) of a given audio frame on the basis of a set of decoded spectral values (162) associated with the given audio frame and provided by the context-based spectral value decoder and in dependence on the time warp information. The context-state determinator (170) is configured to adapt the determination of the context state to a change of a fundamental frequency between subsequent audio frames. An audio signal encoder applies a comparable concept.
摘要翻译：音频信号解码器（150）用于基于包括编码频谱表示（ac_spectral_data []）和编码时间扭曲信息（tw_data []）的编码音频信号表示（152）提供解码音频信号表示（154）基于上下文的频谱值解码器（160），被配置为对描述根据上下文状态的一个或多个频谱值的数字表示的一个或多个频谱值或至少一部分（m）的码字（acod_m）进行解码，音频信号解码器还包括上下文状态确定器（170），配置为根据一个或多个先前解码的频谱值（164，c）来确定当前上下文状态（164，c）音频信号解码器还包括时间扭曲频域 - 时域转换器（180），其被配置为基于以下方式提供给定音频帧的时间扭曲时域表示（182）一套与由给定音频帧相关联并由基于上下文的频谱值解码器提供并且依赖于时间扭曲信息的解码频谱值（162）。上下文状态确定器（170）被配置为使上下文状态的确定适应于后续音频帧之间的基本频率的改变。音频信号编码器应用可比较的概念。

18. 发明申请

WO2011110494A1 IMPROVED MAGNITUDE RESPONSE AND TEMPORAL ALIGNMENT IN PHASE VOCODER BASED BANDWIDTH EXTENSION FOR AUDIO SIGNALS 审中-公开
标题翻译：基于相位VOCODER的音频信号带宽延迟的改进的抖动响应和时间对齐
公开(公告)号：WO2011110494A1
公开(公告)日：2011-09-15
申请号：PCT/EP2011/053298
申请日：2011-03-04
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , DOLBY INTERNATIONAL AB , DISCH, Sascha , NAGEL, Frederik , WILDE, Stephan , VILLEMOES, Lars , EKSTRAND, Per
发明人： DISCH, Sascha , NAGEL, Frederik , WILDE, Stephan , VILLEMOES, Lars , EKSTRAND, Per
IPC分类号： G10L21/02
CPC分类号： G10L19/0208 , G10L19/022 , G10L19/16 , G10L19/26 , G10L21/038
摘要： An apparatus for generating a bandwidth extended audio signal from an input signal, comprises a patch generator for generating one or more patch signals from the input signal, wherein the patch generator is configured for performing a time stretching (1800, 1808) of subband signals from an analysis filterbank, and wherein the patch generator further comprises a phase adjuster (1806) for adjusting phases of the subband signals using a filterbank-channel dependent phase correction.
摘要翻译：一种用于从输入信号产生带宽扩展音频信号的装置，包括用于从所述输入信号产生一个或多个贴片信号的贴片发生器，其中所述贴片发生器被配置用于执行子带信号的时间延伸（1800,1808）分析滤波器组，并且其中所述补丁发生器还包括用于使用滤波器组信道相关相位校正来调整所述子带信号的相位的相位调整器（1806）。

19. 发明申请

WO2011089029A1 IMPROVED SUBBAND BLOCK BASED HARMONIC TRANSPOSITION 审中-公开
标题翻译：改进的基于块块的谐波传输
公开(公告)号：WO2011089029A1
公开(公告)日：2011-07-28
申请号：PCT/EP2011/050114
申请日：2011-01-05
申请人： DOLBY INTERNATIONAL AB , VILLEMOES, Lars
发明人： VILLEMOES, Lars
IPC分类号： G10L21/02 , G10L21/04
CPC分类号： G10L21/038 , G10L19/0204 , G10L19/022 , G10L19/032 , G10L21/04 , G10L25/18
摘要： The present document relates to audio source coding systems which make use of a harmonic transposition method for high frequency reconstruction (HFR), as well as to digital effect processors, e.g. exciters, where generation of harmonic distortion add brightness to the processed signal, and to time stretchers where a signal duration is prolonged with maintained spectral content. A system and method configured to generate a time stretched and/or frequency transposed signal from an input signal is described. The system comprises an analysis filterbank (101) configured to provide an analysis subband signal from the input signal; wherein the analysis subband signal comprises a plurality of complex valued analysis samples, each having a phase and a magnitude. Furthermore, the system comprises a subband processing unit (102) configured to determine a synthesis subband signal from the analysis subband signal using a subband transposition factor Q and a subband stretch factor 5". The subband processing unit (102) performs a block based nonlinear processing wherein the magnitude of samples of the synthesis subband signal are determined from the magnitude of corresponding samples of the analysis subband signal and a predetermined sample of the analysis subband signal. In addition, the system comprises a synthesis filterbank (103) configured to generate the time stretched and/or frequency transposed signal from the synthesis subband signal.
摘要翻译：本文件涉及利用用于高频重构（HFR）的谐波转置方法以及数字效果处理器的音频源编码系统，例如数字效果处理器。激发器，其中产生谐波失真向处理的信号增加亮度，以及延长信号持续时间并保持频谱含量的时间延伸器。描述了一种被配置为从输入信号产生时间延迟和/或频率转置信号的系统和方法。该系统包括被配置为从输入信号提供分析子带信号的分析滤波器组（101）其中所述分析子带信号包括多个具有相位和幅度的复值分析样本。此外，该系统包括子带处理单元（102），被配置为使用子带转置因子Q和子带拉伸因子5“从分析子带信号确定合成子带信号，子带处理单元（102）执行基于块的非线性处理，其中根据分析子带信号和分析子带信号的预定样本的相应样本的幅度确定合成子带信号的样本的幅度，此外，该系统包括合成滤波器组（103），其被配置为产生来自合成子带信号的时间拉伸和/或频率转置信号。

20. 发明申请

WO2011047887A8 OVERSAMPLING IN A COMBINED TRANSPOSER FILTER BANK 审中-公开
公开(公告)号：WO2011047887A8
公开(公告)日：2011-04-28
申请号：PCT/EP2010/057156
申请日：2010-05-25
申请人： DOLBY INTERNATIONAL AB , VILLEMOES, Lars , EKSTRAND, Per
发明人： VILLEMOES, Lars , EKSTRAND, Per
IPC分类号： G10L21/02 , G10L21/04
摘要： The present invention relates to coding of audio signals, and in particular to high frequency reconstruction methods including a frequency domain harmonic transposer. A system and method for generating a high frequency component of a signal from a low frequency component of the signal is described. The system comprises an analysis filter bank (501) comprising an analysis transformation unit (601) having a frequency resolution of Δ ƒ ; and an analysis window (611) having a duration of D A ; the analysis filter bank (501) being configured to provide a set of analysis subband signals from the low frequency component of the signal; a nonlinear processing unit (502, 650) configured to determine a set of synthesis subband signals based on a portion of the set of analysis subband signals, wherein the portion of the set of analysis subband signals is phase shifted by a transposition order T ; and a synthesis filter bank (504) comprising a synthesis transformation unit (602) having a frequency resolution of Q Δ ƒ; and a synthesis window (612) having a duration of D s ; the synthesis filter bank (504) being configured to generate the high frequency component of the signal from the set of synthesis subband signals; wherein Q is a frequency resolution factor with Q ≥ 1 and smaller than the transposition order T ; and wherein the value of the product of the frequency resolution Δ ƒ and the duration D A of the analysis filter bank is selected based on the frequency resolution factor Q .

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