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公开(公告)号：EP3334043B1
公开(公告)日：2019-07-31
申请号：EP18153681.4
申请日：2006-09-01
发明人： Villemoes, Lars
IPC分类号： H03H17/02
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公开(公告)号：EP3334043A1
公开(公告)日：2018-06-13
申请号：EP18153681.4
申请日：2006-09-01
发明人： Villemoes, Lars
IPC分类号： H03H17/02
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.
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43.发明授权
公开(公告)号：EP2337224B1
公开(公告)日：2017-06-21
申请号：EP11160966.5
申请日：2007-07-03
发明人： Villemoes, Lars
CPC分类号： H03H17/0272 , G10L19/0204 , H03H17/0266
摘要： A filter system comprises a filter converter (101) and a filter compressor (102) for generating compressed subband filter impulse responses from input subband filter impulse responses corresponding to subbands, which comprise filter impulse response values at filter taps. The filter compressor comprises a processor (820) 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 (305) 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 comprise zero-valued values corresponding to filter taps of the at least one filter impulse response value having the lower value.
摘要翻译： 用于从对应于包括滤波器抽头处的滤波器脉冲响应值的子带的输入子带滤波器脉冲响应产生压缩的子带滤波器脉冲响应的滤波器压缩器（102）包括处理器（820），用于从至少两个 输入子带滤波器输入响应以找到具有较高值的滤波器脉冲响应值和至少一个具有低于较高值的值的滤波器脉冲响应值;以及滤波器脉冲响应构造器（305），用于使用以下步骤构造压缩子带滤波器脉冲响应 滤波器脉冲响应值具有较高值，其中压缩的子带滤波器脉冲响应不包括对应于具有较低值的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，或者包括对应于滤波器的零值值 至少一个滤波器脉冲响应值的抽头 e具有较低的值。
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44.发明公开Method for reduction of aliasing introduced by spectral envelope adjustment in real-valued filterbanks 有权一种用于减小混叠干扰的方法，所造成的频谱包络的以实数值的滤波器组的调整
公开(公告)号：EP2239847A3
公开(公告)日：2012-03-28
申请号：EP10172087.8
申请日：2003-08-27
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.
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45.发明公开Enhanced coding and parameter representation of multichannel downmixed object coding 有权改进的编码和在多个对象编码下混合信道的参数表示
公开(公告)号：EP2372701A1
公开(公告)日：2011-10-05
申请号：EP11153938.3
申请日：2007-10-05
CPC分类号： G10L19/20 , G10L19/008 , H04S3/008 , H04S3/02 , H04S5/00 , H04S7/30 , H04S2400/03 , H04S2400/11 , H04S2420/03
摘要： An audio object coder for generating an encoded object signal using a plurality of audio objects includes a downmix information generator for generating downmix information indicating a distribution of the plurality of audio objects into at least two downmix channels, an audio object parameter generator for generating object parameters for the audio objects, and an output interface for generating the imported audio output signal using the downmix information and the object parameters. An audio synthesizer uses the downmix information for generating output data usable for creating a plurality of output channels of the predefined audio output configuration.
摘要翻译： 使用音频对象的多个用于编码对象信号的生成的音频对象编码器包括用于生成降混信息指示的音频对象的多元性成至少两个降混声道音频对象参数发生器的分布用于生成对象参数降混信息发生器 用于音频对象，以及用于使用所述降混信息和对象参数导入的音频输出信号输出接口。 音频合成器使用，用于产生可用于创建预定义的音频输出配置的输出通道的多个输出数据降混信息。
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46.发明公开Advanced processing based on a complex-exponential-modulated filterbank and adaptive time signalling methods 有权基于复指数调制滤波器组和自适应时间信令方法的高级处理
公开(公告)号：EP2265042A3
公开(公告)日：2011-03-16
申请号：EP10183592.4
申请日：2004-04-30
发明人： Engdegard, Jonas , Villemoes, Lars
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 (201) 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： 用于使用输入信号生成解相关信号的合成器对多个子带信号起作用，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子带信号的滤波器级（201），其中多个混响子带信号一起表示解相关信号。 该解相关信号用于基于由单声道信号和相干性测量组成的参数编码的立体声信号来重建信号。
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47.发明公开Advanced processing based on a complex-exponential-modulated filterbank and adaptive time signalling methods 有权调制复指数滤波器组和自适应时间信令方法的基础上先进的加工
公开(公告)号：EP2265040A2
公开(公告)日：2010-12-22
申请号：EP10180679.2
申请日：2004-04-30
发明人： Engdegard, Jonas , Villemoes, Lars
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 (201) 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： 一种用于使用在输入信号产生一个去相关信号上的子带信号的多元工作时，worin的子带信号合成器包括至少两个子带样本的序列，代表子带信号的带宽的子带样本的序列，所有这些是 比输入信号的带宽小。 该合成器包括用于使用混响滤波器以获得混响子带信号的多个过滤每个子带信号，worin混响子带信号的多个A滤波器级（201）一起代表解相关信号。 这个去相关信号被用于重建基于一个参量编码的立体声信号由单声道信号和相干性测量的信号。
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48.发明授权Apparatus for calculating gain adjustment values for gain adjusting a plurality of subband signals in real-valued filterbanks and corresponding method 有权设备，用于调节多个子带信号的增益以实数值的滤波器组和相关的方法计算增益调整值
公开(公告)号：EP1643642B1
公开(公告)日：2010-08-18
申请号：EP06000181.5
申请日：2003-08-27
IPC分类号： H03H17/02
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改善实值滤波器组的基于频谱包络调整器的性能的新方法。 通过自适应地锁定为在应用程序定义的依赖于信道的符号相邻信道时，增益值，减小混叠的实现。 进一步，增益计算时的信道的分组，使在滤波器组的实值子带信号的改进的能量估计。
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公开(公告)号：EP3454471A1
公开(公告)日：2019-03-13
申请号：EP18171733.1
申请日：2006-09-01
发明人： Villemoes, Lars
IPC分类号： H03H17/02
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.
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