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1. 发明申请

WO2010069885A1 AUDIO ENCODER AND BANDWIDTH EXTENSION DECODER 审中-公开
标题翻译：音频编码器和带宽扩展解码器
公开(公告)号：WO2010069885A1
公开(公告)日：2010-06-24
申请号：PCT/EP2009/066980
申请日：2009-12-11
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , NAGEL, Frederik , DISCH, Sascha , FUCHS, Guillaume , HERRE, Jürgen , GRIEBEL, Christian
发明人： NAGEL, Frederik , DISCH, Sascha , FUCHS, Guillaume , HERRE, Jürgen , GRIEBEL, Christian
IPC分类号： G10L21/02 , G10L19/06 , G10L19/08
CPC分类号： G10L19/265 , G10L19/00 , G10L19/24 , G10L21/038
摘要： An audio encoder for providing an output signal using an input audio signal comprises a patch generator, a comparator and an output interface. The patch generator generates at least one bandwidth extension high-frequency signal, wherein a bandwidth extension high-frequency signal comprises a high-frequency band. The high-frequency band of the bandwidth extension high-frequency signal is based on a low frequency band of the input audio signal. A comparator calculates a plurality of comparison parameters. A comparison parameter is calculated based on a comparison of the input audio signal and a generated bandwidth extension high-frequency signal. Each comparison parameter of the plurality of comparison parameters is calculated based on a different offset frequency between the input audio signal and a generated bandwidth extension high-frequency signal. Further, the comparator determines a comparison parameter from the plurality of comparison parameters, wherein the determined comparison parameter fulfills a predefined criterion.
摘要翻译：用于使用输入音频信号提供输出信号的音频编码器包括片生成器，比较器和输出接口。贴片发生器产生至少一个带宽扩展高频信号，其中带宽扩展高频信号包括高频带。带宽扩展高频信号的高频带基于输入音频信号的低频带。比较器计算多个比较参数。基于输入音频信号和产生的带宽扩展高频信号的比较来计算比较参数。基于输入音频信号和生成的带宽扩展高频信号之间的不同偏移频率来计算多个比较参数的每个比较参数。此外，比较器确定来自多个比较参数的比较参数，其中确定的比较参数满足预定标准。

2. 发明申请

WO2010003617A1 LOW BITRATE AUDIO ENCODING/DECODING SCHEME WITH COMMON PREPROCESSING 审中-公开
标题翻译：低分辨率音频编码/解码方案与通用预处理
公开(公告)号：WO2010003617A1
公开(公告)日：2010-01-14
申请号：PCT/EP2009/004873
申请日：2009-07-06
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , GRILL, Bernhard , BAYER, Stefan , FUCHS, Guillaume , GEYERSBERGER, Stefan , GEIGER, Ralf , HILPERT, Johannes , KRAEMER, Ulrich , LECOMTE, Jeremie , MULTRUS, Markus , NEUENDORF, Max , POPP, Harald , RETTELBACH, Nikolaus , NAGEL, Frederik , DISCH, Sascha , HERRE, Juergen , YOKOTANI, Yoshikazu , WABNIK, Stefan , SCHULLER, Gerald , HIRSCHFELD, Jens
发明人： GRILL, Bernhard , BAYER, Stefan , FUCHS, Guillaume , GEYERSBERGER, Stefan , GEIGER, Ralf , HILPERT, Johannes , KRAEMER, Ulrich , LECOMTE, Jeremie , MULTRUS, Markus , NEUENDORF, Max , POPP, Harald , RETTELBACH, Nikolaus , NAGEL, Frederik , DISCH, Sascha , HERRE, Juergen , YOKOTANI, Yoshikazu , WABNIK, Stefan , SCHULLER, Gerald , HIRSCHFELD, Jens
IPC分类号： G10L19/14
CPC分类号： G10L19/173 , G10L19/0017 , G10L19/008 , G10L19/0212 , G10L19/18 , G10L2019/0008
摘要： An audio encoder comprises a common preprocessing stage (100), an information sink based encoding branch (400) such as spectral domain encoding branch, a information source based encoding branch (500) such as an LPC-domain encoding branch and a switch (200) for switching between these branches at inputs into these branches or outputs of these branches controlled by a decision stage (300). An audio decoder comprises a spectral domain decoding branch, an LPC- domain decoding branch, one or more switches for switching between the branches and a common post-processing stage for post-processing a time-domain audio signal for obtaining a post-processed audio signal.
摘要翻译：音频编码器包括公共预处理级（100），诸如频域编码分支的基于信息集合的编码分支（400），诸如LPC域编码分支的信息源编码分支（500）和开关（200 ），用于在由决策阶段（300）控制的这些分支的这些分支或输出的输入处在这些分支之间切换。音频解码器包括频域解码分支，LPC域解码分支，用于在分支之间切换的一个或多个开关和用于后处理时域音频信号以用于获得后处理音频的公共后处理级信号。

3. 发明申请

WO2011110496A1 APPARATUS AND METHOD FOR HANDLING TRANSIENT SOUND EVENTS IN AUDIO SIGNALS WHEN CHANGING THE REPLAY SPEED OR PITCH 审中-公开
标题翻译：在更换复印机速度或倾斜时在音频信号中处理瞬态声音事件的装置和方法
公开(公告)号：WO2011110496A1
公开(公告)日：2011-09-15
申请号：PCT/EP2011/053303
申请日：2011-03-04
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , DISCH, Sascha , NAGEL, Frederik , WILDE, Stephan
发明人： DISCH, Sascha , NAGEL, Frederik , WILDE, Stephan
IPC分类号： G10L21/02 , G10L21/04
CPC分类号： G10L21/038 , G10L19/025 , G10L21/04
摘要： An apparatus for processing an audio signal comprises an overlap-add stage for overlapping and adding blocks of a corresponding one of a plurality of subband signals using an overlap-add-advance value being different from a block extraction advance value. The apparatus further comprises a transient detector for detecting a transient in the audio signal or a subband signal of the plurality of subband signals. The overlap-add stage is configured for reducing an influence of a detected transient or for not using the detected transients when adding. The apparatus further comprises a transient adder for adding a detected transient to a subband signal generated by the overlap/add stage. A related method for processing an audio signal comprises, inter alia, either reducing an influence or discarding a detected transient when overlapping and adding.
摘要翻译：一种用于处理音频信号的装置包括：使用与块提取提前值不同的重叠加法值，来叠加和添加多个子带信号中相应的一个子带信号的块的重叠添加级。该装置还包括用于检测音频信号中的瞬态或多个子带信号的子带信号的瞬态检测器。重叠添加级被配置为减少检测到的瞬态的影响或者在添加时不使用检测到的瞬变。该装置还包括一个瞬态加法器，用于将检测到的瞬态值与由重叠/加法级产生的子带信号相加。用于处理音频信号的相关方法尤其包括在重叠和相加时减少影响或丢弃检测到的瞬变。

4. 发明申请

WO2011110494A1 IMPROVED MAGNITUDE RESPONSE AND TEMPORAL ALIGNMENT IN PHASE VOCODER BASED BANDWIDTH EXTENSION FOR AUDIO SIGNALS 审中-公开
标题翻译：基于相位VOCODER的音频信号带宽延迟的改进的抖动响应和时间对齐
公开(公告)号：WO2011110494A1
公开(公告)日：2011-09-15
申请号：PCT/EP2011/053298
申请日：2011-03-04
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , DOLBY INTERNATIONAL AB , DISCH, Sascha , NAGEL, Frederik , WILDE, Stephan , VILLEMOES, Lars , EKSTRAND, Per
发明人： DISCH, Sascha , NAGEL, Frederik , WILDE, Stephan , VILLEMOES, Lars , EKSTRAND, Per
IPC分类号： G10L21/02
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, comprises 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 (1800, 1808) of subband signals from an analysis filterbank, and wherein the patch generator further comprises a phase adjuster (1806) 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用于执行子带信号的时间延伸（1800,1808）分析滤波器组，并且其中所述补丁发生器还包括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的相位调整器（1806）。

5. 发明申请

WO2011047886A1 APPARATUS AND METHOD FOR GENERATING A HIGH FREQUENCY AUDIO SIGNAL USING ADAPTIVE OVERSAMPLING 审中-公开
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：WO2011047886A1
公开(公告)日：2011-04-28
申请号：PCT/EP2010/057130
申请日：2010-05-25
申请人： DOLBY INTERNATIONAL AB , FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , VILLEMOES, Lars , EKSTRAND, Per , DISCH, Sascha , NAGEL, Frederik , WILDE, Stefan
发明人： VILLEMOES, Lars , EKSTRAND, Per , DISCH, Sascha , NAGEL, Frederik , WILDE, Stefan
IPC分类号： G10L21/02 , G10L19/02
CPC分类号： G10L21/038 , G10L19/025
摘要： An apparatus for generating a high frequency audio signal that comprises an analyzer (12) for analyzing an input signal to determine a transient information adaptively. Additionally a spectral converter (14) is provided for converting the input signal into an input spectral representation. A spectral processor (13) processes the input spectral representation to generate a processed spectral representation comprising values for higher frequencies than the input spectral representation. A time converter (17) 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，包括分析器（12），用于分析输入信号以自适应地确定瞬时信息。另外，提供频谱转换器（14）用于将输入信号转换成输入频谱表示。频谱处理器（13）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频谱表示。时间转换器（17）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，以对具有相关瞬态信息的输入信号的第一部分进行频域过采样，不对不具有相关联的瞬时信息的输入信号的第二部分执行频域过采样。

6. 发明申请

WO2010003539A1 AUDIO SIGNAL SYNTHESIZER AND AUDIO SIGNAL ENCODER 审中-公开
标题翻译：音频信号合成器和音频信号编码器
公开(公告)号：WO2010003539A1
公开(公告)日：2010-01-14
申请号：PCT/EP2009/004451
申请日：2009-06-19
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , NAGEL, Frederik , DISCH, Sascha , RETTELBACH, Nikolaus , NEUENDORF, Max , GRILL, Bernhard , KRÄMER, Ulrich , WABNIK, Stefan
发明人： NAGEL, Frederik , DISCH, Sascha , RETTELBACH, Nikolaus , NEUENDORF, Max , GRILL, Bernhard , KRÄMER, Ulrich , WABNIK, Stefan
IPC分类号： G10L21/02
CPC分类号： G10L21/038 , G10L19/02
摘要： In accordance with a first aspect of the invention, an audio signal synthesizer generates a synthesis audio signal having a first frequency band and a second synthesized frequency band derived from the first frequency band. The audio signal synthesizer comprises a patch generator, a spectral converter, a raw signal processor and a combiner. The patch generator performs at least two different patching algorithms, wherein each patching algorithm generates a raw signal having signal components in the second synthesized frequency band using an audio signal having signal components in the first frequency band. The patch generator is adapted to select one of the at least two different patching algorithms in response to a control information for a first time portion and the other of the at least two different patching algorithms in response to the control information for a second time portion different from the first time portion to obtain the raw signal for the first and the second time portion. The spectral converter converts the raw signal into a raw signal spectral representation. The raw signal processor processes the raw signal spectral representation in response to spectral domain spectral band replication parameters to obtain an adjusted raw signal spectral representation. The combiner combines an audio signal having signal components in the first band or a signal derived from the audio signal with the adjusted raw signal spectral representation or with a further signal derived from the adjusted raw signal spectral representation to obtain the synthesis audio signal.
摘要翻译：根据本发明的第一方面，音频信号合成器产生具有从第一频带导出的第一频带和第二合成频带的合成音频信号。音频信号合成器包括片生成器，频谱转换器，原始信号处理器和组合器。贴片发生器执行至少两种不同的修补算法，其中每个修补算法使用具有第一频带中的信号分量的音频信号来生成具有第二合成频带中的信号分量的原始信号。补丁生成器适于响应于第一时间部分的控制信息和所述至少两个不同修补算法中的另一个响应于第二时间部分的控制信息而选择至少两个不同的修补算法中的一个不同从第一时间部分获得第一和第二时间部分的原始信号。光谱转换器将原始信号转换为原始信号光谱表示。原始信号处理器响应于频域谱带复制参数处理原始信号频谱表示，以获得经调整的原始信号频谱表示。组合器将具有第一频带中的信号分量的音频信号或从音频信号导出的信号与经调整的原始信号频谱表示或者从经调整的原始信号频谱表示导出的另一信号组合以获得合成音频信号。

7. 发明申请

WO2010108895A1 DEVICE AND METHOD FOR MANIPULATING AN AUDIO SIGNAL 审中-公开
标题翻译：用于操纵音频信号的装置和方法
公开(公告)号：WO2010108895A1
公开(公告)日：2010-09-30
申请号：PCT/EP2010/053720
申请日：2010-03-22
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , DISCH, Sascha , NAGEL, Frederik , NEUENDORF, Max , HELMRICH, Christian , ZORN, Dominik
发明人： DISCH, Sascha , NAGEL, Frederik , NEUENDORF, Max , HELMRICH, Christian , ZORN, Dominik
IPC分类号： G10L19/02 , G10L21/02
CPC分类号： G10L21/038 , G10L19/025 , G10L21/007
摘要： A device and method for manipulating an audio signal comprises a windower (102) for generating a plurality of consecutive blocks of audio samples, the plurality of consecutive blocks comprising at least one padded block of audio samples, the padded block having padded values and audio signal values, a first converter (104) for converting the padded block into a spectral representation having spectral values, a phase modifier (106) for modifying phases of the spectral values to obtain a modified spectral representation and a second converter (108) for converting the modified spectral representation into a modified time domain audio signal.
摘要翻译：用于操纵音频信号的装置和方法包括用于产生多个连续的音频采样块的加窗器（102），所述多个连续块包括至少一个填充的音频采样块，所述填充块具有填充值和音频信号值，用于将填充块转换成具有频谱值的频谱表示的第一转换器（104），用于修改频谱值的相位以获得修改的频谱表示的相位修改器（106）和用于转换将修改的频谱表示转换为修改的时域音频信号。

8. 发明申请

WO2011144617A1 APPARATUS AND METHOD FOR EXTENDING OR COMPRESSING TIME SECTIONS OF AN AUDIO SIGNAL 审中-公开
标题翻译：用于扩展或压缩音频信号时间段的装置和方法
公开(公告)号：WO2011144617A1
公开(公告)日：2011-11-24
申请号：PCT/EP2011/057979
申请日：2011-05-17
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , NAGEL, Frederik , GEYERSBERGER, Stefan , DISCH, Sascha , NEUENDORF, Max
发明人： NAGEL, Frederik , GEYERSBERGER, Stefan , DISCH, Sascha , NEUENDORF, Max
IPC分类号： G10L21/04
CPC分类号： G10L21/04
摘要： An audio signal processor (100) comprising an analysis means (104), a manipulation factor unit (106), and a time-stretching and compression device (108). The analysis means (104) is implemented to determine a first measure of information content (M 1 ) of a first time section of an audio signal and a second measure of information content (M 2 ) of a second time section. The manipulation factor unit (106) is implemented to determine a time manipulation factor (ΔD 1 ) for the first time section in dependence on the first measure of information content (M 1 ) and the second measure of information content (M 2 ). The time-stretching and compression device (108) is implemented to time-stretch or compress the first time section according to the manipulation factor (ΔD 1 ) and to treat the second time section differently from the first time section. A corresponding method for adjusting time information content variations of an audio signal (s) is also disclosed. The determination of the first measure of information content and of the second measure of information content may be based on externally provided control information such as meta-data provided along with the audio signal.
摘要翻译：音频信号处理器（100）包括分析装置（104），操纵因子单元（106）和时间延伸和压缩装置（108）。执行分析装置（104）以确定音频信号的第一时间段的信息内容（M1）和第二时间段的信息内容（M2）的第二测量的第一测量。执行操纵因子单元（106）以根据信息内容（M1）的第一测量和信息内容（M2）的第二测量来确定第一时间段的时间操纵因子（ΔD1）。时间延伸和压缩装置（108）被实现为根据操作因子（ΔD1）对第一时间段进行时间拉伸或压缩，并且与第一时间段不同地对待第二时间段。还公开了一种用于调整音频信号的时间信息内容变化的相应方法。信息内容的第一测量和第二信息内容测量的确定可以基于外部提供的控制信息，例如与音频信号一起提供的元数据。

9. 发明申请

WO2011110500A1 APPARATUS AND METHOD FOR PROCESSING AN INPUT AUDIO SIGNAL USING CASCADED FILTERBANKS 审中-公开
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：WO2011110500A1
公开(公告)日：2011-09-15
申请号：PCT/EP2011/053315
申请日：2011-03-04
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , DOLBY INTERNATIONAL AB , VILLEMOES, Lars , EKSTRAND, Per , DISCH, Sascha , NAGEL, Frederik , WILDE, Stephan
发明人： VILLEMOES, Lars , EKSTRAND, Per , DISCH, Sascha , NAGEL, Frederik , WILDE, Stephan
IPC分类号： G10L19/02 , G10L21/02 , G10L21/04
CPC分类号： G10L19/008 , G10L19/0204 , G10L21/038 , G10L21/04
摘要： An apparatus for processing an input audio signal (2300) relies on a cascade of filterbanks, the cascade comprising a synthesis filterbank (2304) for synthesizing an audio intermediate signal (2306) from the input audio signal (2300), the input audio signal being represented by a plurality of first subband signals (2303) generated by an analysis filterbank (2302), wherein a number of filterbank channels of the synthesis filterbank (2304) is smaller than a number of channels of the analysis filterbank (2302). The apparatus furthermore comprises a further analysis filterbank (2307) for generating a plurality of second subband signals (2308) from the audio intermediate signal (2306), wherein the further analysis filterbank has a number of channels being different from the number of channels of the synthesis filterbank (2304), so that a sampling rate of a subband signal of the plurality of second subband signals (2308) is different from a sampling rate of a first subband signal of the plurality of first subband signals (2303).
摘要翻译：用于处理输入音频信号（2300）的装置依赖于级联的滤波器组，级联包括用于从输入音频信号（2300）合成音频中间信号（2306）的合成滤波器组（2304），输入音频信号为由分析滤波器组（2302）生成的多个第一子带信号（2303）表示，其中合成滤波器组（2304）的多个滤波器组信道小于分析滤波器组（2302）的信道数。该装置还包括用于从音频中间信号（2306）产生多个第二子带信号（2308）的另一分析滤波器组（2307），其中所述另外的分析滤波器组具有与所述音频中间信号合成滤波器组（2304），使得多个第二子带信号（2308）的子带信号的采样率与多个第一子带信号（2303）中的第一子带信号的采样率不同。

10. 发明申请

WO2010003543A1 APPARATUS AND METHOD FOR CALCULATING BANDWIDTH EXTENSION DATA USING A SPECTRAL TILT CONTROLLING FRAMING 审中-公开
标题翻译：使用光谱倾斜控制框架计算带宽扩展数据的装置和方法
公开(公告)号：WO2010003543A1
公开(公告)日：2010-01-14
申请号：PCT/EP2009/004520
申请日：2009-06-23
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , NEUENDORF, Max , KRAEMER, Ulrich , NAGEL, Frederik , DISCH, Sascha , WABNIK, Stefan
发明人： NEUENDORF, Max , KRAEMER, Ulrich , NAGEL, Frederik , DISCH, Sascha , WABNIK, Stefan
IPC分类号： G10L21/02
CPC分类号： G10L21/038 , G10L19/022
摘要： An apparatus for calculating bandwidth extension data of an audio signal in a bandwidth extension system, in which a first spectral band is encoded with a first number of bits and a second spectral band different from the first spectral band is encoded with a second number of bits, the second number of bits being smaller than the first number of bits, has a controllable bandwidth extension parameter calculator (10) for calculating bandwidth extension parameters for the second frequency band in a frame-wise manner for a sequence of frames of the audio signal. Each frame has a controllable start time instant. The apparatus additionally comprises a spectral tilt detector (12) for detecting a spectral tilt in a time portion of the audio signal and for signaling the start time instant for the individual frames of the audio signal depending on spectral tilt.
摘要翻译：一种用于计算带宽扩展系统中的音频信号的带宽扩展数据的装置，其中以第一数量的比特编码第一频谱带和与第一频谱带不同的第二频谱带来编码第二数量的比特所述第二比特数小于所述第一比特数，具有可控带宽扩展参数计算器（10），用于针对所述音频信号的帧序列以帧方式计算所述第二频带的带宽扩展参数。每个帧具有可控的开始时刻。该装置还包括用于检测音频信号的时间部分中的频谱倾斜并且根据频谱倾斜来发送音频信号的各个帧的开始时刻的频谱倾斜检测器（12）。

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