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91. 发明授权

US07720677B2 Time warped modified transform coding of audio signals 有权
标题翻译：音频信号的时间变形变换编码
公开(公告)号：US07720677B2
公开(公告)日：2010-05-18
申请号：US11464176
申请日：2006-08-11
申请人： Lars Villemoes
发明人： Lars Villemoes
IPC分类号： G10L11/04
CPC分类号： G10L19/002 , G10L19/0212 , G10L19/022
摘要： A spectral representation of an audio signal having consecutive audio frames can be derived more efficiently, when a common time warp is estimated for any two neighboring frames, such that a following block transform can additionally use the warp information. Thus, window functions required for successful application of an overlap and add procedure during reconstruction can be derived and applied, the window functions already anticipating the re-sampling of the signal due to the time warping. Therefore, the increased efficiency of block-based transform coding of time-warped signals can be used without introducing audible discontinuities.
摘要翻译：当为任何两个相邻帧估计公共时间扭曲时，可以更有效地导出具有连续音频帧的音频信号的频谱表示，使得随后的块变换可以另外使用经线信息。因此，可以导出并应用在重建期间成功应用重叠和添加过程所需的窗口功能，窗函数已经预期由于时间扭曲而对信号的重新采样。因此，可以使用时间扭曲信号的基于块的变换编码的增加的效率而不引入可听不连续性。

92. 发明申请

US20100017195A1 Filter Unit and Method for Generating Subband Filter Impulse Responses 有权
标题翻译：滤波器单元和生成子带滤波器脉冲响应的方法
公开(公告)号：US20100017195A1
公开(公告)日：2010-01-21
申请号：US12305931
申请日：2007-07-03
申请人： Lars Villemoes
发明人： Lars Villemoes
IPC分类号： G10L19/00 , G10L19/14 , H04R5/00
CPC分类号： H03H17/0272 , G10L19/0204 , H03H17/0266
摘要： A filter compressor for generating compressed subband filter impulse responses from input subband filter impulse responses corresponding to subbands, which include filter impulse response values at filter taps, includes a processor 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 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 include zero-valued values corresponding to filter taps of the at least one filter impulse response value having the lower value.
摘要翻译：用于从与子带对应的输入子带滤波器脉冲响应产生压缩子带滤波器脉冲响应的滤波器压缩器包括滤波器抽头上的滤波器脉冲响应值的处理器，用于从至少两个输入子带滤波器输入响应检测滤波器脉冲响应值找到具有较高值的滤波器脉冲响应值和具有低于较高值的值的至少一个滤波器脉冲响应值;以及滤波器脉冲响应构造器，用于使用具有较高值的滤波器脉冲响应值来构造压缩的子带滤波器脉冲响应，其中所述压缩子带滤波器脉冲响应不包括对应于具有较低值的所述至少一个滤波器脉冲响应值的滤波器抽头的滤波器脉冲响应值，或包括对应于所述至少一个滤波器脉冲响应的滤波器抽头的零值值具有较低va的值呃

93. 发明授权

US07590543B2 Method for reduction of aliasing introduced by spectral envelope adjustment in real-valued filterbanks 有权
标题翻译：减少由实数滤波器组中的频谱包络调整引入的混叠的方法
公开(公告)号：US07590543B2
公开(公告)日：2009-09-15
申请号：US11859521
申请日：2007-09-21
申请人： Kristofer Kjorling , Lars Villemoes
发明人： Kristofer Kjorling , Lars Villemoes
IPC分类号： G10L19/00 , H04B15/00
CPC分类号： G10L19/0204 , G10L19/00 , G10L19/025 , G10L19/083 , G10L19/12 , G10L19/26 , G10L25/12 , G10L25/18 , G10L25/21 , G10L25/48 , H03H17/0266
摘要： The present invention proposes a new method for improving the performance of a real-valued filterbank based spectral envelope adjuster. By adaptively locking the gain values for adjacent channels dependent on the sign of the channels, as defined in the application, reduced aliasing is achieved. Furthermore, the grouping of the channels during gain-calculation, gives an improved energy estimate of the real valued subband signals in the filterbank.
摘要翻译：本发明提出了一种用于提高基于实数滤波器组的频谱包络调节器的性能的新方法。通过自适应地锁定取决于通道的符号的相邻通道的增益值，如应用中定义的那样，实现了减少的混叠。此外，增益计算期间信道的分组给出了滤波器组中实值子带信号的改进的能量估计。

94. 发明申请

US20070179781A1 EFFICIENT FILTERING WITH A COMPLEX MODULATED FILTERBANK 有权
标题翻译：使用复杂调制滤波器进行有效滤波
公开(公告)号：US20070179781A1
公开(公告)日：2007-08-02
申请号：US11469790
申请日：2006-09-01
申请人： Lars Villemoes
发明人： Lars Villemoes
IPC分类号： G10L19/14
CPC分类号： G10L19/02 , G10L19/0204 , H03H17/0266 , H03H17/0294 , H03H2218/04
摘要： A filter apparatus for filtering a time domain input signal to obtain a time domain output signal, which is a representation of the time domain input signal filtered using a filter characteristic having an non-uniform amplitude/frequency characteristic, comprises a complex analysis filter bank for generating a plurality of complex subband signals from the time domain input signals, a plurality of intermediate filters, wherein at least one of the intermediate filters of the plurality of the intermediate filters has a non-uniform amplitude/frequency characteristic, wherein the plurality of intermediate filters have a shorter impulse response compared to an impulse response of a filter having the filter characteristic, and wherein the non-uniform amplitude/frequency characteristics of the plurality of intermediate filters together represent the non-uniform filter characteristic, and a complex synthesis filter bank for synthesizing the output of the intermediate filters to obtain the time domain output signal.
摘要翻译：一种用于对时域输入信号进行滤波以获得时域输出信号的滤波器装置，其是使用具有不均匀幅度/频率特性的滤波器特性滤波的时域输入信号的表示，包括复分析滤波器组，用于从所述时域输入信号产生多个复数子带信号，多个中间滤波器，其中所述多个中间滤波器中的至少一个中间滤波器具有不均匀的幅度/频率特性，其中所述多个中间滤波器与具有滤波器特性的滤波器的脉冲响应相比，滤波器具有更短的脉冲响应，并且其中多个中间滤波器的非均匀幅度/频率特性一起表示非均匀滤波器特性，并且复合成滤波器组用于合成中间滤波器的输出以获得时间域输出信号。

95. 发明申请

US20070121952A1 Advanced processing based on a complex-exponential-modulated filterbank and adaptive time signalling methods 有权
标题翻译：基于复指数调制滤波器组和自适应时间信号方法的高级处理
公开(公告)号：US20070121952A1
公开(公告)日：2007-05-31
申请号：US11698611
申请日：2007-01-26
申请人： Jonas Engdegard , Lars Villemoes
发明人： Jonas Engdegard , Lars Villemoes
IPC分类号： H04H5/00
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 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.
摘要翻译：用于使用输入信号产生去相关信号的合成器在多个子带信号上操作，其中子带信号包括至少两个子带样本的序列，子带样本的序列表示子带信号的带宽，其是小于输入信号的带宽。合成器包括滤波器级，用于使用混响滤波器对每个子带信号进行滤波以获得多个混响的子带信号，其中多个混响的子带信号一起表示解相关信号。该去相关信号用于基于由单声道信号和相干测量组成的参数编码的立体声信号来重构信号。

96. 发明授权

US09129597B2 Audio signal decoder, audio signal encoder, methods and computer program using a sampling rate dependent time-warp contour encoding 有权
标题翻译：音频信号解码器，音频信号编码器，方法和计算机程序使用采样率相关的时间 - 扭曲轮廓编码
公开(公告)号：US09129597B2
公开(公告)日：2015-09-08
申请号：US13604869
申请日：2012-09-06
申请人： Stefan Bayer , Tom Baeckstroem , Ralf Geiger , Bernd Edler , Sascha Disch , Lars Villemoes
发明人： Stefan Bayer , Tom Baeckstroem , Ralf Geiger , Bernd Edler , Sascha Disch , Lars Villemoes
IPC分类号： G10L19/00 , G10L19/022 , G10L19/02 , G10L25/90
CPC分类号： G10L19/022 , G10L19/0212 , G10L25/90
摘要： An audio signal decoder configured to provide a decoded audio signal representation on the basis of an encoded audio signal representation including a sampling frequency information, an encoded time warp information and an encoded spectrum representation includes a time warp calculator and a warp decoder. The time warp calculator is configured to adapt a mapping rule for mapping codewords of the encoded time warp information onto decoded time warp values describing the decoded time warp information in dependence on the sampling frequency information. The warp decoder is configured to provide the decoded audio signal representation on the basis of the encoded spectrum representation and in dependence on the decoded time warp information.
摘要翻译：音频信号解码器被配置为基于包括采样频率信息，编码时间扭曲信息和编码频谱表示的编码音频信号表示来提供解码音频信号表示，包括时间扭曲计算器和扭曲解码器。时间扭曲计算器被配置成适应用于将编码的时间扭曲信息的码字映射到根据采样频率信息描述解码的时间扭曲信息的解码的时间扭曲值的映射规则。翘曲解码器被配置为基于编码的频谱表示并且依赖于解码的时间扭曲信息来提供解码的音频信号表示。

97. 发明授权

US08433583B2 Audio decoding 有权
标题翻译：音频解码
公开(公告)号：US08433583B2
公开(公告)日：2013-04-30
申请号：US12294255
申请日：2007-03-23
申请人： Lars Villemoes , Erik Schuijers
发明人： Lars Villemoes , Erik Schuijers
IPC分类号： G10L19/00
CPC分类号： H04S3/008 , G10L19/008 , G10L19/0208 , G10L25/18
摘要： An audio decoder comprises a receiver (801) for receiving input data comprising an N-channel signal corresponding to a down-mixed signal of an M-channel audio signal, M>N, having complex valued subband encoding matrices applied in frequency subbands and parametric multi-channel data. A subband filter bank (805) generates real-valued frequency subbands for the N-channel signal. A matrix processor (809) determines real-valued subband decoding matrices for compensating the application of the encoding matrices in response to the parametric multi-channel data. A compensation processor (807) generates down-mix data corresponding to the down-mixed signal by a matrix multiplication of the real-valued subband decoding matrices and data of the N-channel signal in the at least some real-valued frequency subbands. The down-mix data can be used to regenerate the down-mixed signal and the M-channel audio signal. The decoder may compensate for MPEG Matrix Surround Compatibility operations performed at the encoder using real-valued frequency subbands.
摘要翻译：音频解码器包括接收器（801），用于接收输入数据，该输入数据包括对应于M频道音频信号M> N的下混合信号的N信道信号，M信道具有在频率子带中应用的复值子带编码矩阵，并且参数多通道数据。子带滤波器组（805）产生用于N沟道信号的实数频率子带。矩阵处理器（809）响应于参数多通道数据确定用于补偿编码矩阵的应用的实值子带解码矩阵。补偿处理器（807）通过实数子带解码矩阵的矩阵乘法和至少一些实数频率子带中的N信道信号的数据来生成与下混合信号相对应的下混数据。下混合数据可用于再生下混合信号和M声道音频信号。解码器可以补偿在编码器处使用实数频率子带执行的MPEG矩阵环绕兼容性操作。

98. 发明申请

US20090234646A1 Method for Reduction of Aliasing Introduced by Spectral Envelope Adjustment in Real-Valued Filterbanks 有权
标题翻译：减少实数滤波器中频谱信号调整引入的混叠的方法
公开(公告)号：US20090234646A1
公开(公告)日：2009-09-17
申请号：US12473075
申请日：2009-05-27
申请人： Kristofer Kjorling , Lars Villemoes
发明人： Kristofer Kjorling , Lars Villemoes
IPC分类号： G10L19/14 , G10L21/00
CPC分类号： G10L19/0204 , G10L19/00 , G10L19/025 , G10L19/083 , G10L19/12 , G10L19/26 , G10L25/12 , G10L25/18 , G10L25/21 , G10L25/48 , H03H17/0266
摘要： The present invention proposes a new method for improving the performance of a real-valued filterbank based spectral envelope adjuster. By adaptively locking the gain values for adjacent channels dependent on the sign of the channels, as defined in the application, reduced aliasing is achieved. Furthermore, the grouping of the channels during gain-calculation, gives an improved energy estimate of the real valued subband signals in the filterbank.
摘要翻译：本发明提出了一种用于提高基于实数滤波器组的频谱包络调节器的性能的新方法。通过自适应地锁定取决于通道的符号的相邻通道的增益值，如应用中定义的那样，实现了减少的混叠。此外，增益计算期间信道的分组给出了滤波器组中实值子带信号的改进的能量估计。

99. 发明授权

US07564978B2 Advanced processing based on a complex-exponential-modulated filterbank and adaptive time signalling methods 有权
标题翻译：基于复指数调制滤波器组和自适应时间信号方法的高级处理
公开(公告)号：US07564978B2
公开(公告)日：2009-07-21
申请号：US11698611
申请日：2007-01-26
申请人： Jonas Engdegard , Lars Villemoes
发明人： Jonas Engdegard , Lars Villemoes
IPC分类号： G10L19/00
CPC分类号： G10L19/008 , G10L19/0204 , H03H17/0266 , H04S5/00 , H04S2420/03
摘要： A multi-channel decoder is provided for decoding a mono signal and an associated inter-channel coherence measure, the inter-channel coherence measure representing a coherence between a plurality of original channels, the mono signal being derived from the plurality of original channels.
摘要翻译：提供多通道解码器用于对单声道信号和相关联的信道间相干性测量进行解码，所述信道间相干测量表示多个原始信道之间的相干性，所述单声道信号从多个原始信道导出。

100. 发明申请

US20080015868A1 METHOD FOR REDUCTION OF ALIASING INTRODUCED BY SPECTRAL ENVELOPE ADJUSTMENT IN REAL-VALUED FILTERBANKS 有权
标题翻译：用于减少真实值滤波器中光谱环境调整引起的干扰的方法
公开(公告)号：US20080015868A1
公开(公告)日：2008-01-17
申请号：US11862143
申请日：2007-09-26
申请人： Kristofer KJORLING , Lars Villemoes
发明人： Kristofer KJORLING , Lars Villemoes
IPC分类号： G10L19/00
CPC分类号： G10L19/0204 , G10L19/00 , G10L19/025 , G10L19/083 , G10L19/12 , G10L19/26 , G10L25/12 , G10L25/18 , G10L25/21 , G10L25/48 , H03H17/0266
摘要： The present invention proposes a new method for improving the performance of a real-valued filterbank based spectral envelope adjuster. By adaptively locking the gain values for adjacent channels dependent on the sign of the channels, as defined in the application, reduced aliasing is achieved. Furthermore, the grouping of the channels during gain-calculation, gives an improved energy estimate of the real valued subband signals in the filterbank.
摘要翻译：本发明提出了一种用于提高基于实数滤波器组的频谱包络调节器的性能的新方法。通过自适应地锁定取决于通道的符号的相邻通道的增益值，如应用中定义的那样，实现了减少的混叠。此外，增益计算期间信道的分组给出了滤波器组中实值子带信号的改进的能量估计。

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