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51. 发明授权

US08983852B2 Efficient combined harmonic transposition 有权
标题翻译：有效的组合谐波转置
公开(公告)号：US08983852B2
公开(公告)日：2015-03-17
申请号：US13321910
申请日：2010-05-25
申请人： Per Ekstrand , Lars Villemoes , Per Hedelin
发明人： Per Ekstrand , Lars Villemoes , Per Hedelin
IPC分类号： G10L19/00
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 Δf, 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 FΔf; 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; 描述了一种被配置为从信号的低频分量产生信号的高频分量的系统。该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具有频率分辨率＆Dgr; f，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＆Dgr; f的频率分辨率; F为分辨率因子，F≥1; 其中转置次数P与分辨率因子F不同

52. 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。

53. 发明申请

US20120065983A1 Efficient Combined Harmonic Transposition 有权
标题翻译：有效的组合谐波转置
公开(公告)号：US20120065983A1
公开(公告)日：2012-03-15
申请号：US13321910
申请日：2010-05-25
申请人： Per Ekstrand , Lars Villemoes , Per Hedelin
发明人： Per Ekstrand , Lars Villemoes , Per Hedelin
IPC分类号： G10L19/00
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 Δf, 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 FΔf; 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; 描述了一种被配置为从信号的低频分量产生信号的高频分量的系统。该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具有频率分辨率＆Dgr; f，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＆Dgr; f的频率分辨率; F为分辨率因子，F≥1; 其中转置次数P与分辨率因子F不同

54. 发明授权

US07260520B2 Enhancing source coding systems by adaptive transposition 有权
标题翻译：通过自适应转置增强源编码系统
公开(公告)号：US07260520B2
公开(公告)日：2007-08-21
申请号：US10022526
申请日：2001-12-20
申请人： Fredrik Henn , Kristofer Kjörling , Per Ekstrand , Lars Villemoes
发明人： Fredrik Henn , Kristofer Kjörling , Per Ekstrand , Lars Villemoes
IPC分类号： G10L19/14
CPC分类号： G10L21/038
摘要： The present invention relates to a new method for enhancement of source coding systems using high-frequency reconstruction. The invention teaches that tonal signals can be classified as either pulse-train-like or non-pulse-train-like. Relying on this classification, significant improvements on the perceived audio quality can be obtained by adaptive switching of transposers. The invention shows that the so-switched transposers must have fundamental differences in their characteristics.
摘要翻译：本发明涉及一种用于增强使用高频重构的源编码系统的新方法。本发明教导了音调信号可以被分类为脉冲列式或非脉冲列式。依靠这一分类，可以通过转换器的自适应切换获得感知音频质量的显着改进。本发明表明，所谓的交换式转移器在其特征上必须具有根本的差异。

55. 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.

56. 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。

57. 发明授权

US09236061B2 Harmonic transposition in an audio coding method and system 有权
标题翻译：音频编码方法和系统中的谐波转置
公开(公告)号：US09236061B2
公开(公告)日：2016-01-12
申请号：US12881821
申请日：2010-09-14
申请人： Per Ekstrand , Lars Villemoes
发明人： Per Ekstrand , Lars Villemoes
IPC分类号： G10L21/04 , G10L19/022 , G10L21/038
CPC分类号： G10L19/022 , G10L19/0212 , G10L19/24 , G10L21/038 , G10L21/04
摘要： The present invention relates to transposing signals in time and/or frequency and in particular to coding of audio signals. More particular, the present invention relates to high frequency reconstruction (HFR) methods including a frequency domain harmonic transposer. A method and system for generating a transposed output signal from an input signal using a transposition factor T is described. The system comprises an analysis window of length La, extracting a frame of the input signal, and an analysis transformation unit of order M transforming the samples into M complex coefficients. M is a function of the transposition factor T. The system further comprises a nonlinear processing unit altering the phase of the complex coefficients by using the transposition factor T, a synthesis transformation unit of order M transforming the altered coefficients into M altered samples, and a synthesis window of length Ls, generating a frame of the output signal.
摘要翻译：本发明涉及在时间和/或频率上转置信号，特别涉及音频信号的编码。更具体地，本发明涉及包括频域谐波转移器的高频重构（HFR）方法。描述了使用转置因子T从输入信号生成转置输出信号的方法和系统。该系统包括长度为La的分析窗口，提取输入信号的帧，以及将样本变换为M个复系数的阶数M的分析变换单元。 M是转置因子T的函数。该系统还包括通过使用转置因子T来改变复系数的相位的非线性处理单元，将改变的系数转换为M个改变的样本的阶数M的合成变换单元，以及合成窗口长度Ls，产生输出信号的帧。

58. 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。

59. 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。

60. 发明申请

US20110004479A1 HARMONIC TRANSPOSITION 有权
标题翻译：谐波传输
公开(公告)号：US20110004479A1
公开(公告)日：2011-01-06
申请号：US12881821
申请日：2010-09-14
申请人： Per Ekstrand , Lars Villemoes
发明人： Per Ekstrand , Lars Villemoes
IPC分类号： G10L19/00
CPC分类号： G10L19/022 , G10L19/0212 , G10L19/24 , G10L21/038 , G10L21/04
摘要： The present invention relates to transposing signals in time and/or frequency and in particular to coding of audio signals. More particular, the present invention relates to high frequency reconstruction (HFR) methods including a frequency domain harmonic transposer. A method and system for generating a transposed output signal from an input signal using a transposition factor T is described. The system comprises an analysis window of length La, extracting a frame of the input to signal, and an analysis transformation unit of order M transforming the samples into M complex coefficients. M is a function of the transposition factor T. The system further comprises a nonlinear processing unit altering the phase of the complex coefficients by using the transposition factor T, a synthesis transformation unit of order M transforming the altered coefficients into M altered samples, and a synthesis window of length Ls, generating a frame of the output signal.
摘要翻译：本发明涉及在时间和/或频率上转置信号，特别涉及音频信号的编码。更具体地，本发明涉及包括频域谐波转移器的高频重构（HFR）方法。描述了使用转置因子T从输入信号生成转置输出信号的方法和系统。该系统包括长度为La的分析窗口，提取输入信号的帧，以及将样本变换为M个复系数的阶数M的分析变换单元。 M是转置因子T的函数。该系统还包括通过使用转置因子T来改变复系数的相位的非线性处理单元，将改变的系数转换为M个改变的样本的阶数M的合成变换单元，以及合成窗口长度Ls，产生输出信号的帧。

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