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1. 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。

2. 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。

3. 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。

4. 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。

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. 发明授权

US09524726B2 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 有权
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，用于对音频信号进行编码的方法和使用编码上下文的音调依赖性调整的计算机程序
公开(公告)号：US09524726B2
公开(公告)日：2016-12-20
申请号：US13608980
申请日：2012-09-10
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： G10L19/14 , G10L19/022 , G10L19/02 , G10L25/90
CPC分类号： G10L19/022 , G10L19/0212 , G10L25/90
摘要： An audio signal decoder includes a context-based spectral value decoder configured to decode a codeword describing one or more spectral values or at least a portion of a number representation thereof in dependence on a context state. The audio signal decoder also includes a context state determinator configured to determine a current context state in dependence on one or more previously decoded spectral values and a time warping frequency-domain-to-time-domain converter configured to provide a time-warped time-domain representation of a given audio frame on the basis of a set of decoded spectral values provided by the context-based spectral value decoder and in dependence on the time warp information. The context-state determinator 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：音频信号解码器包括基于上下文的频谱值解码器，其被配置为根据上下文状态来解码描述一个或多个频谱值的码字或其数字表示的至少一部分。音频信号解码器还包括上下文状态确定器，其被配置为根据一个或多个先前解码的频谱值确定当前上下文状态，以及时间扭曲频域 - 时域转换器，被配置为提供时间扭曲的时域 - 基于由基于上下文的频谱值解码器提供的解码频谱值的集合并且依赖于时间扭曲信息，给定音频帧的域表示。上下文状态确定器被配置为使上下文状态的确定适应随后的音频帧之间的基频的改变。音频信号编码器应用可比较的概念。

10. 发明申请

US20130073296A1 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，使用采样速率的方法和计算机程序依赖于时间波形编码
公开(公告)号：US20130073296A1
公开(公告)日：2013-03-21
申请号：US13604869
申请日：2012-09-06
申请人： Stefan Bayer , Tom Baeckstroem , Ralf Reiger , Bernd Edler , Sascha Disch , Lars Villemoes
发明人： Stefan Bayer , Tom Baeckstroem , Ralf Reiger , Bernd Edler , Sascha Disch , Lars Villemoes
IPC分类号： G10L19/00
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。

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