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1. 发明授权

US09318127B2 Device and method for improved magnitude response and temporal alignment in a phase vocoder based bandwidth extension method for audio signals 有权
标题翻译：用于音频信号的基于相位声码器的带宽扩展方法中的幅度响应和时间对准的装置和方法
公开(公告)号：US09318127B2
公开(公告)日：2016-04-19
申请号：US13604313
申请日：2012-09-05
申请人： Sascha Disch , Frederik Nagel , Stephan Wilde , Lars Villemoes , Per Ekstrand
发明人： Sascha Disch , Frederik Nagel , Stephan Wilde , Lars Villemoes , Per Ekstrand
IPC分类号： G10L21/038
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, includes 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 of subband signals from an analysis filterbank, and wherein the patch generator further includes a phase adjuster 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为执行来自分析滤波器组的子带信号的时间拉伸，以及其中所述补丁发生器还包括相位调整器，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。

2. 发明申请

US20120281859A1 APPARATUS AND METHOD FOR GENERATING A HIGH FREQUENCY AUDIO SIGNAL USING ADAPTIVE OVERSAMPLING 有权
标题翻译：使用自适应超声波产生高频音频信号的装置和方法
公开(公告)号：US20120281859A1
公开(公告)日：2012-11-08
申请号：US13503248
申请日：2010-05-25
申请人： Lars Villemoes , Per Ekstrand , Sascha Disch , Frederik Nagel , Stephan Wilde
发明人： Lars Villemoes , Per Ekstrand , Sascha Disch , Frederik Nagel , Stephan Wilde
IPC分类号： H03G5/00
CPC分类号： G10L21/038 , G10L19/025
摘要： An apparatus for generating a high frequency audio signal that includes an analyzer for analyzing an input signal to determine a transient information adaptively. Additionally a spectral converter is provided for converting the input signal into an input spectral representation. A spectral processor processes the input spectral representation to generate a processed spectral representation including values for higher frequencies than the input spectral representation. A time converter is configured for converting the processed spectral representation to a time representation, wherein the spectral converter or the time converter are controllable to perform a frequency domain oversampling for the first portion of the input signal having the transient information associated and to not perform the frequency domain oversampling for the second portion of the input signal not having the associated transient information.
摘要翻译：一种用于产生高频音频信号的装置，包括用于分析输入信号的分析器，以自适应地确定瞬时信息。另外，提供了用于将输入信号转换为输入频谱表示的频谱转换器。频谱处理器处理输入频谱表示以产生包括比输入频谱表示更高频率的值的经处理的频谱表示。时间转换器被配置为将经处理的频谱表示转换为时间表示，其中频谱转换器或时间转换器是可控制的，以对具有相关联的瞬态信息的输入信号的第一部分执行频域过采样，并且不执行输入信号的第二部分不具有相关联的瞬态信息的频域过采样。

3. 发明授权

US09159337B2 Apparatus and method for generating a high frequency audio signal using adaptive oversampling 有权
标题翻译：使用自适应过采样来生成高频音频信号的装置和方法
公开(公告)号：US09159337B2
公开(公告)日：2015-10-13
申请号：US13503248
申请日：2010-05-25
申请人： Lars Villemoes , Per Ekstrand , Sascha Disch , Frederik Nagel , Stephan Wilde
发明人： Lars Villemoes , Per Ekstrand , Sascha Disch , Frederik Nagel , Stephan Wilde
IPC分类号： H04R3/04 , G10L21/038 , G10L19/025
CPC分类号： G10L21/038 , G10L19/025
摘要： An apparatus for generating a high frequency audio signal that includes an analyzer for analyzing an input signal to determine a transient information adaptively. Additionally a spectral converter is provided for converting the input signal into an input spectral representation. A spectral processor processes the input spectral representation to generate a processed spectral representation including values for higher frequencies than the input spectral representation. A time converter is configured for converting the processed spectral representation to a time representation, wherein the spectral converter or the time converter are controllable to perform a frequency domain oversampling for the first portion of the input signal having the transient information associated and to not perform the frequency domain oversampling for the second portion of the input signal not having the associated transient information.
摘要翻译：一种用于产生高频音频信号的装置，包括用于分析输入信号的分析器，以自适应地确定瞬时信息。另外，提供了用于将输入信号转换为输入频谱表示的频谱转换器。频谱处理器处理输入频谱表示以产生包括比输入频谱表示更高频率的值的经处理的频谱表示。时间转换器被配置为将经处理的频谱表示转换为时间表示，其中频谱转换器或时间转换器是可控制的，以对具有相关联的瞬态信息的输入信号的第一部分执行频域过采样，并且不执行输入信号的第二部分不具有相关联的瞬态信息的频域过采样。

4. 发明申请

US20130090933A1 APPARATUS AND METHOD FOR PROCESSING AN INPUT AUDIO SIGNAL USING CASCADED FILTERBANKS 有权
标题翻译：使用CASCAD FILTERBANK处理输入音频信号的装置和方法
公开(公告)号：US20130090933A1
公开(公告)日：2013-04-11
申请号：US13604364
申请日：2012-09-05
申请人： Lars Villemoes , Per Ekstrand , Sascha Disch , Frederik Nagel , Stephan Wilde
发明人： Lars Villemoes , Per Ekstrand , Sascha Disch , Frederik Nagel , Stephan Wilde
IPC分类号： G10L19/008
CPC分类号： G10L19/008 , G10L19/0204 , G10L21/038 , G10L21/04
摘要： An apparatus for processing an input audio signal relies on a cascade of filterbanks, the cascade having a synthesis filterbank for synthesizing an audio intermediate signal from the input audio signal, the input audio signal being represented by a plurality of first subband signals generated by an analysis filterbank, wherein a number of filterbank channels of the synthesis filterbank is smaller than a number of channels of the analysis filterbank. The apparatus furthermore has a further analysis filterbank for generating a plurality of second subband signals from the audio intermediate signal, wherein the further analysis filterbank has a number of channels being different from the number of channels of the synthesis filterbank, so that a sampling rate of a subband signal of the plurality of second subband signals is different from a sampling rate of a first subband signal of the plurality of first subband signals.
摘要翻译：用于处理输入音频信号的装置依赖于级联的滤波器组，该级联具有用于从输入音频信号合成音频中间信号的合成滤波器组，输入音频信号由分析产生的多个第一子带信号表示滤波器组，其中合成滤波器组的多个滤波器组信道小于分析滤波器组的信道数。该装置还具有用于从音频中间信号产生多个第二子带信号的进一步的分析滤波器组，其中进一步的分析滤波器组具有与合成滤波器组的信道数不同的信道数，使得采样率多个第二子带信号的子带信号与多个第一子带信号的第一子带信号的采样率不同。

5. 发明授权

US09792915B2 Apparatus and method for processing an input audio signal using cascaded filterbanks 有权
公开(公告)号：US09792915B2
公开(公告)日：2017-10-17
申请号：US13604364
申请日：2012-09-05
申请人： Lars Villemoes , Per Ekstrand , Sascha Disch , Frederik Nagel , Stephan Wilde
发明人： Lars Villemoes , Per Ekstrand , Sascha Disch , Frederik Nagel , Stephan Wilde
IPC分类号： G10L19/008 , G10L19/02 , G10L21/038 , G10L21/04
CPC分类号： G10L19/008 , G10L19/0204 , G10L21/038 , G10L21/04
摘要： An apparatus for processing an input audio signal relies on a cascade of filterbanks, the cascade having a synthesis filterbank for synthesizing an audio intermediate signal from the input audio signal, the input audio signal being represented by a plurality of first subband signals generated by an analysis filterbank, wherein a number of filterbank channels of the synthesis filterbank is smaller than a number of channels of the analysis filterbank. The apparatus furthermore has a further analysis filterbank for generating a plurality of second subband signals from the audio intermediate signal, wherein the further analysis filterbank has a number of channels being different from the number of channels of the synthesis filterbank, so that a sampling rate of a subband signal of the plurality of second subband signals is different from a sampling rate of a first subband signal of the plurality of first subband signals.

6. 发明授权

US09305557B2 Apparatus and method for processing an audio signal using patch border alignment 有权
标题翻译：使用补丁边界对齐处理音频信号的装置和方法
公开(公告)号：US09305557B2
公开(公告)日：2016-04-05
申请号：US13604336
申请日：2012-09-05
申请人： Frederik Nagel , Sascha Disch , Stephan Wilde , Lars Villemoes , Per Ekstrand
发明人： Frederik Nagel , Sascha Disch , Stephan Wilde , Lars Villemoes , Per Ekstrand
IPC分类号： G10L19/08 , G10L19/008 , G10L19/02 , G10L21/038 , G10L21/04
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 includes a patch border calculator for calculating a patch border such that the patch border coincides with a frequency band border of the frequency bands. The apparatus further includes a patcher for generating a patched signal using the audio signal 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用于计算的频块边界计算器贴片边界使得贴片边界与频带的频带边界重合。该装置还包括一个修补器，用于使用音频信号和补片边界产生修补信号。

7. 发明申请

US20130058498A1 DEVICE AND METHOD FOR IMPROVED MAGNITUDE RESPONSE AND TEMPORAL ALIGNMENT IN A PHASE VOCODER BASED BANDWIDTH EXTENSION METHOD FOR AUDIO SIGNALS 有权
标题翻译：用于音频信号的基于相位VOCODER的带宽延迟扩展方法中改进的波形响应和时间对准的装置和方法
公开(公告)号：US20130058498A1
公开(公告)日：2013-03-07
申请号：US13604313
申请日：2012-09-05
申请人： Sascha Disch , Frederik Nagel , Stephan Wilde , Lars Villemoes , Per Ekstrand
发明人： Sascha Disch , Frederik Nagel , Stephan Wilde , Lars Villemoes , Per Ekstrand
IPC分类号： H04R1/40
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, includes 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 of subband signals from an analysis filterbank, and wherein the patch generator further includes a phase adjuster 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为执行来自分析滤波器组的子带信号的时间拉伸，以及其中所述补丁发生器还包括相位调整器，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。

8. 发明申请

US20130051571A1 APPARATUS AND METHOD FOR PROCESSING AN AUDIO SIGNAL USING PATCH BORDER ALIGNMENT 有权
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：US20130051571A1
公开(公告)日：2013-02-28
申请号：US13604336
申请日：2012-09-05
申请人： Frederik Nagel , Sascha Disch , Stephan Wilde , Lars Villemoes , Per Ekstrand
发明人： Frederik Nagel , Sascha Disch , Stephan Wilde , Lars Villemoes , Per Ekstrand
IPC分类号： H04R29/00
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 includes a patch border calculator for calculating a patch border such that the patch border coincides with a frequency band border of the frequency bands. The apparatus further includes a patcher for generating a patched signal using the audio signal 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用于计算的频块边界计算器贴片边界使得贴片边界与频带的频带边界重合。该装置还包括一个修补器，用于使用音频信号和补片边界产生修补信号。

9. 发明申请

US20120195442A1 OVERSAMPLING IN A COMBINED TRANSPOSER FILTER BANK 有权
标题翻译：在一个组合的运输过滤器银行中进行过滤
公开(公告)号：US20120195442A1
公开(公告)日：2012-08-02
申请号：US13499893
申请日：2010-05-20
申请人： Lars Villemoes , Per Ekstrand
发明人： Lars Villemoes , Per Ekstrand
IPC分类号： H03G5/00
CPC分类号： C12Q1/6883 , C12Q2600/118 , C12Q2600/156 , G10L19/0204 , G10L19/022 , G10L19/265 , G10L21/038
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 Δf; and an analysis window (611) having a duration of DA; 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 QΔf; and a synthesis window (612) having a duration of Ds; 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 Δf and the duration DA of the analysis filter bank is selected based on the frequency resolution factor Q.
摘要翻译：本发明涉及音频信号的编码，特别涉及包括频域谐波转移器的高频重构方法。描述了用于从信号的低频分量产生信号的高频分量的系统和方法。该系统包括分析滤波器组（501），其包括频率分辨率为＆Dgr; f的分析变换单元（601）和具有DA持续时间的分析窗口（611）; 所述分析滤波器组（501）被配置为从所述信号的低频分量提供一组分析子带信号; 非线性处理单元（502,650），被配置为基于所述一组分析子带信号来确定一组合成子带信号，其中所述一组分析子带信号的所述部分被相移一个换位阶数T; f）具有频率分辨率为Q＆Dgr; f的合成变换单元（602）的合成滤波器组（504）和具有持续时间Ds的合成窗口（612）; 所述合成滤波器组（504）被配置为从所述一组合成子带信号中产生所述信号的高频分量; 其中Q是具有Q≥1且小于置换次数T的频率分辨率因子; 并且其中基于频率分辨率因子Q选择频率分辨率＆Dgr; f的乘积值和分析滤波器组的持续时间DA。

10. 发明授权

US07917561B2 Partially complex modulated filter bank 有权
标题翻译：部分复杂调制滤波器组
公开(公告)号：US07917561B2
公开(公告)日：2011-03-29
申请号：US11463263
申请日：2006-08-08
申请人： Per Ekstrand , Lars Villemoes , Heiko Purnhagen
发明人： Per Ekstrand , Lars Villemoes , Heiko Purnhagen
IPC分类号： G06F17/10
CPC分类号： G10L19/0208
摘要： An apparatus for processing a plurality of real-valued subband signals using a first real-valued subband signal and a second real-valued subband signal to provide at least a complex-valued subband signal comprises a multiband filter for providing an intermediate real-valued subband signal and a calculator for providing the complex-valued subband signal by combining a real-valued subband signal from the plurality of real-valued subband signals and the intermediate subband signal.
摘要翻译：一种用于使用第一实值子带信号和第二实值子带信号来处理多个实值子带信号以提供至少复值子带信号的装置包括多频带滤波器，用于提供中间实值子带信号和用于通过组合来自多个实值子带信号和中间子带信号的实值子带信号来提供复值子带信号的计算器。

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