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1. 发明公开

EP2709106A1 Apparatus and method for generating a bandwidth extended signal from a bandwidth limited audio signal 审中-公开
标题翻译：装置和方法用于从与有限带宽的音频信号生成带宽扩展信号
公开(公告)号：EP2709106A1
公开(公告)日：2014-03-19
申请号：EP12184706.5
申请日：2012-09-17
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： Nagel, Frederik , Wilde, Stephan
IPC分类号： G10L21/038
CPC分类号： G10L19/00 , G10L19/008 , G10L19/0208 , G10L19/025 , G10L21/038
摘要： An apparatus (100) for generating a bandwidth extended signal (135) from a bandwidth limited audio signal (105), the bandwidth limited audio signal (105) comprising a plurality of consecutive bandwidth limited time blocks (511), each bandwidth limited time block having at least one associated spectral band replication parameter comprising a core frequency band and the bandwidth extended signal (135) comprising a plurality of consecutive bandwidth extended time blocks (513), comprises a patch generator (110), a signal manipulator (120) and a combiner (130). The patch generator (110) is configured for generating a patched signal (115) comprising an upper frequency band using a bandwidth limited time block of the bandwidth limited audio signal (105). The patch generator (110) is configured to perform a harmonic patching algorithm (515) to obtain the patched signal (115). The patch generator (110) is configured to perform the harmonic patching algorithm (515) for a current bandwidth extended time block (m') of the plurality of consecutive bandwidth extended time blocks (513) using a timely preceding bandwidth limited time block (m - 1) of the plurality of consecutive bandwidth limited time blocks (511) of the bandwidth limited audio signal (105). The signal manipulator (120) is configured for manipulating a signal (105) before patching or the patched signal (115) generated using the timely preceding bandwidth limited time block (m - 1) using a spectral band replication parameter (121) associated with a current bandwidth limited time block (m) to obtain a manipulated patched signal (125) comprising the upper frequency band. The timely preceding bandwidth limited time block (m - 1) timely precedes the current bandwidth limited time block (m) in the plurality of consecutive bandwidth limited time blocks (511) of the bandwidth limited audio signal (105). The combiner (130) is configured for combining the bandwidth limited audio signal (105) comprising the core frequency band and the manipulated patched signal (125) comprising the upper frequency band to obtain the bandwidth extended signal (135).
摘要翻译：用于从包括连续带宽有限的时间块的多个（511），每个带宽有限的时间块的带宽有限的音频信号（105），所述带宽受限的音频信号（105）生成带宽扩展信号（135）的装置（100）具有至少一个相关联的频谱带复制参数包括核心频带和包括连续带宽扩展时间块的多个（513）的带宽扩展信号（135）包括补丁生成器（110），信号操纵器（120）和一个组合器（130）。补丁生成器（110）被配置用于产生包括上频带-使用有限带宽的音频信号（105）的带宽有限的时间块的修补信号（115）。补丁生成器（110）被配置为执行一个谐波修补算法（515），以获得修补信号（115）。补丁生成器（110）被配置为针对当前带宽扩展时间块连续带宽扩展时间块的使用及时preceding-带宽有限的时间块中的多元性（513）的（M“）（米执行谐波修补算法（515）在带宽受限的音频信号（105）的连续的带宽有限的时间的块（511）的多个1） - 。所述信号操纵器（120）被配置用于修补或使用及时preceding-带宽有限的时间块产生的修补信号（115）之前操纵信号（105）（M - 1）使用与相关联的（121）的频谱带复制参数当前带宽有限的时间块（M）以获得包含上限频率带的操纵修补信号（125）。及时preceding-带宽有限的时间块（M - 1）之前及时在带宽受限的音频信号（105）的连续带宽有限的时间的块（511）的多个当前带宽有限的时间块（M）。所述组合器（130）被配置用于组合包括所述核心频带-和包含上限频率操纵修补信号（125）的有限带宽的音频信号（105）的带，以获得所述带宽扩展信号（135）。

2. 发明公开

EP3471094A1 APPARATUS AND METHOD FOR GENERATING AN ENHANCED SIGNAL USING INDEPENDENT NOISE-FILLING 审中-实审转让
公开(公告)号：EP3471094A1
公开(公告)日：2019-04-17
申请号：EP18209545.5
申请日：2015-07-24
申请人： FRAUNHOFER-GESELLSCHAFT zur Förderung der angewandten Forschung e.V.
发明人： Disch, Sascha , Geiger, Ralf , Niedermeier, Andreas , Neusinger, Matthias , Schmidt, Konstantin , Wilde, Stephan , Schubert, Benjamin , Neukam, Christian
IPC分类号： G10L19/028 , G10L21/038
摘要： An apparatus for generating an enhanced signal from an input signal (600), wherein the enhanced signal has spectral values for an enhancement spectral region, the spectral values for the enhancement spectral regions not being contained in the input signal (600), comprises a mapper (602) for mapping a source spectral region of the input signal to a target region in the enhancement spectral region, the source spectral region comprising a noise-filling region (302); and a noise filler (604) configured for generating first noise values for the noise-filling region (302) in the source spectral region of the input signal and for generating second noise values for a noise region in the target region, wherein the second noise values are decorrelated from the first noise values or for generating second noise values for a noise region in the target region, wherein the second noise values are decorrelated from first noise values in the source region.

3. 发明公开

EP3070713A1 AUDIO ENCODER, AUDIO DECODER, METHOD FOR PROVIDING AN ENCODED AUDIO INFORMATION, METHOD FOR PROVIDING A DECODED AUDIO INFORMATION, COMPUTER PROGRAM AND ENCODED REPRESENTATION USING A SIGNAL-ADAPTIVE BANDWIDTH EXTENSION 有权
标题翻译：音频编码器，音频解码器，提供编码音频信息的方法，使用信号自适应带宽扩展提供解码音频信息，计算机程序和编码表示的方法
公开(公告)号：EP3070713A1
公开(公告)日：2016-09-21
申请号：EP16162701.3
申请日：2014-01-28
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： Disch, Sascha , Helmrich, Christian , Hilpert, Johannes , Robilliard, Julien , Schmidt, Konstantin , Wilde, Stephan
IPC分类号： G10L19/22 , G10L19/26 , G10L21/038
CPC分类号： G10L19/24 , G10L19/20 , G10L19/26 , G10L19/265 , G10L21/038
摘要： An audio encoder for providing an encoded audio information on the basis of an input audio information comprises a low frequency encoder configured to encode a low frequency portion of the input audio information to obtain an encoded representation of the low frequency portion, and a bandwidth extension information provider configured to provide bandwidth extension information on the basis of the input audio information. The audio encoder is configured to selectively include bandwidth extension information into the encoded audio information in a signal-adaptive manner. An audio decoder comprises a low frequency decoder configured to decode an encoded representation of a low frequency portion to obtain a decoded representation of the low frequency portion, and a bandwidth extension configured to obtain a bandwidth extension signal using a blind bandwidth extension for portions of an audio content for which no bandwidth extension parameters are included in the encoded audio information, and to obtain the bandwidth extension signal using a parameter-guided bandwidth extension for portions of the audio content for which bandwidth extension parameters are included in the encoded audio information.
摘要翻译：一种用于基于输入音频信息提供编码音频信息的音频编码器包括：低频编码器，被配置为对输入音频信息的低频部分进行编码以获得低频部分的编码表示;以及带宽扩展信息提供器，被配置为基于输入音频信息提供带宽扩展信息。音频编码器被配置为以信号自适应的方式将带宽扩展信息选择性地包括到编码的音频信息中。音频解码器包括：低频解码器，被配置为对低频部分的编码表示进行解码以获得低频部分的解码表示;以及带宽扩展，被配置为使用盲带宽扩展来获得带宽扩展信号，音频内容，其中没有带宽扩展参数被包括在编码音频信息中，并且对于其中带宽扩展参数被包括在编码音频信息中的音频内容的部分，使用参数引导的带宽扩展来获得带宽扩展信号。

4. 发明授权

EP3070713B1 AUDIO ENCODER, AUDIO DECODER, METHOD FOR PROVIDING AN ENCODED AUDIO INFORMATION, METHOD FOR PROVIDING A DECODED AUDIO INFORMATION, COMPUTER PROGRAM AND ENCODED REPRESENTATION USING A SIGNAL-ADAPTIVE BANDWIDTH EXTENSION 有权
标题翻译：音频编码器，音频解码器，提供编码音频信息的方法，使用信号自适应带宽扩展提供解码音频信息，计算机程序和编码表示的方法
公开(公告)号：EP3070713B1
公开(公告)日：2018-01-17
申请号：EP16162701.3
申请日：2014-01-28
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： Disch, Sascha , Helmrich, Christian , Hilpert, Johannes , Robilliard, Julien , Schmidt, Konstantin , Wilde, Stephan
IPC分类号： G10L19/20 , G10L19/26 , G10L21/038
CPC分类号： G10L19/24 , G10L19/20 , G10L19/26 , G10L19/265 , G10L21/038
摘要： An audio encoder for providing an encoded audio information on the basis of an input audio information comprises a low frequency encoder configured to encode a low frequency portion of the input audio information to obtain an encoded representation of the low frequency portion, and a bandwidth extension information provider configured to provide bandwidth extension information on the basis of the input audio information. The audio encoder is configured to selectively include bandwidth extension information into the encoded audio information in a signal-adaptive manner. An audio decoder comprises a low frequency decoder configured to decode an encoded representation of a low frequency portion to obtain a decoded representation of the low frequency portion, and a bandwidth extension configured to obtain a bandwidth extension signal using a blind bandwidth extension for portions of an audio content for which no bandwidth extension parameters are included in the encoded audio information, and to obtain the bandwidth extension signal using a parameter-guided bandwidth extension for portions of the audio content for which bandwidth extension parameters are included in the encoded audio information.

5. 发明公开

EP3054446A1 AUDIO ENCODER, AUDIO DECODER, METHOD FOR PROVIDING AN ENCODED AUDIO INFORMATION, METHOD FOR PROVIDING A DECODED AUDIO INFORMATION, COMPUTER PROGRAM AND ENCODED REPRESENTATION USING A SIGNAL-ADAPTIVE BANDWIDTH EXTENSION 有权转让
公开(公告)号：EP3054446A1
公开(公告)日：2016-08-10
申请号：EP16162696.5
申请日：2014-01-28
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： Disch, Sascha , Helmrich, Christian , Hilpert, Johannes , Robilliard, Julien , Schmidt, Konstantin , Wilde, Stephan
IPC分类号： G10L19/22 , G10L21/038
CPC分类号： G10L19/24 , G10L19/20 , G10L19/26 , G10L19/265 , G10L21/038
摘要： An audio encoder for providing an encoded audio information on the basis of an input audio information comprises a low frequency encoder configured to encode a low frequency portion of the input audio information to obtain an encoded representation of the low frequency portion, and a bandwidth extension information provider configured to provide bandwidth extension information on the basis of the input audio information. The audio encoder is configured to selectively include bandwidth extension information into the encoded audio information in a signal-adaptive manner. An audio decoder comprises a low frequency decoder configured to decode an encoded representation of a low frequency portion to obtain a decoded representation of the low frequency portion, and a bandwidth extension configured to obtain a bandwidth extension signal using a blind bandwidth extension for portions of an audio content for which no bandwidth extension parameters are included in the encoded audio information, and to obtain the bandwidth extension signal using a parameter-guided bandwidth extension for portions of the audio content for which bandwidth extension parameters are included in the encoded audio information.

6. 发明公开

EP4148729A1 APPARATUS, METHOD AND PROGRAM FOR DOWNSAMPLING AN AUDIO SIGNAL 审中-实审
公开(公告)号：EP4148729A1
公开(公告)日：2023-03-15
申请号：EP22203358.1
申请日：2011-03-04
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. , Dolby International AB
发明人： Villemoes, Lars , Ekstrand, Per , Disch, Sascha , Nagel, Frederik , Wilde, Stephan
IPC分类号： G10L19/02 , G10L21/04 , G10L21/038
摘要： An apparatus for downsampling an audio signal comprise a first filter bank (102, 601, 2302) for generating a plurality of subband signals from the audio signal, wherein a sampling rate of the subband signals is smaller than a sampling rate of the audio signal; at least one synthesis filter bank (602-2, 2304) followed by an analysis filter bank (603-2, 2307) for performing a sample rate conversion to obtain a sample rate converted signal, the synthesis filter bank (602-2) having a number of channels different from a number of channels of the analysis filter bank (603-2); a time stretch processor (604-2, 2309) for processing the sample rate converted signal to obtain a time stretched signal; and a combiner (605, 2311) for combining the time stretched signal and a low-band signal or a different time stretched signal.

7. 发明公开

EP2881943A1 Apparatus and method for decoding an encoded audio signal with low computational resources 审中-公开
标题翻译：装置和方法，用于与小计算机资源进行解码的编码的音频信号
公开(公告)号：EP2881943A1
公开(公告)日：2015-06-10
申请号：EP13196305.0
申请日：2013-12-09
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： Niedermeier, Andreas , Wilde, Stephan , Fischer, Daniel , Hildenbrand, Matthias , Gayer, Marc , Neuendorf, Max
IPC分类号： G10L19/24 , G10L19/20 , G10L21/038
CPC分类号： G10L19/22 , G10L19/022 , G10L19/167 , G10L19/20 , G10L19/24 , G10L21/038
摘要： An apparatus for decoding an encoded audio signal (101) comprising bandwidth extension control data indicating either a first harmonic bandwidth extension mode or a second non-harmonic bandwidth extension mode, comprises: an input interface (100) for receiving the encoded audio signal comprising the bandwidth extension control data indicating either the first harmonic bandwidth extension mode or the second non-harmonic bandwidth extension mode; a processor (102) for decoding the audio signal (101) using the second non-harmonic bandwidth extension mode; and a controller (104) for controlling the processor (102) to decode the audio signal using the second non-harmonic bandwidth extension mode, even when the bandwidth extension control data indicates the first harmonic bandwidth extension mode for the encoded signal.
摘要翻译：用于编码音频信号（101）包括带宽扩展controldata表示是一次谐波带宽扩展模式或第二非谐波带宽扩展模式的解码的设备，包括：用于接收所述编码的音频信号包括所述输入接口（100）带宽扩展controldata表示是第一谐波带宽扩展模式或者第二非谐波带宽扩展模式; 用于使用所述第二非谐波带宽扩展模式中的音频信号（101）进行解码的处理器（102）; 和用于控制所述处理器（102）使用所述第二非谐波带宽扩展模式中的音频信号进行解码，即使在带宽扩展控制数据指示用于所述经编码信号的所述第一谐波带宽扩展模式的控制器（104）。

8. 发明授权

EP3067890B1 AUDIO ENCODER, AUDIO DECODER, METHOD FOR PROVIDING AN ENCODED AUDIO INFORMATION, METHOD FOR PROVIDING A DECODED AUDIO INFORMATION, COMPUTER PROGRAM AND ENCODED REPRESENTATION USING A SIGNAL-ADAPTIVE BANDWIDTH EXTENSION 有权
公开(公告)号：EP3067890B1
公开(公告)日：2018-01-03
申请号：EP16162697.3
申请日：2014-01-28
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： Disch, Sascha , Helmrich, Christian , Hilpert, Johannes , Robilliard, Julien , Schmidt, Konstantin , Wilde, Stephan
IPC分类号： G10L19/20 , G10L21/038
CPC分类号： G10L19/24 , G10L19/20 , G10L19/26 , G10L19/265 , G10L21/038
摘要： An audio encoder for providing an encoded audio information on the basis of an input audio information comprises a low frequency encoder configured to encode a low frequency portion of the input audio information to obtain an encoded representation of the low frequency portion, and a bandwidth extension information provider configured to provide bandwidth extension information on the basis of the input audio information. The audio encoder is configured to selectively include bandwidth extension information into the encoded audio information in a signal-adaptive manner. An audio decoder comprises a low frequency decoder configured to decode an encoded representation of a low frequency portion to obtain a decoded representation of the low frequency portion, and a bandwidth extension configured to obtain a bandwidth extension signal using a blind bandwidth extension for portions of an audio content for which no bandwidth extension parameters are included in the encoded audio information, and to obtain the bandwidth extension signal using a parameter-guided bandwidth extension for portions of the audio content for which bandwidth extension parameters are included in the encoded audio information.

9. 发明公开

EP3067890A1 AUDIO ENCODER, AUDIO DECODER, METHOD FOR PROVIDING AN ENCODED AUDIO INFORMATION, METHOD FOR PROVIDING A DECODED AUDIO INFORMATION, COMPUTER PROGRAM AND ENCODED REPRESENTATION USING A SIGNAL-ADAPTIVE BANDWIDTH EXTENSION 有权
标题翻译：音频编码器，音频解码器，方法用于提供编码音频信息，方法，用于提供译码音频信息，计算机程序和存储器演示与信号自适应带宽扩展
公开(公告)号：EP3067890A1
公开(公告)日：2016-09-14
申请号：EP16162697.3
申请日：2014-01-28
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： Disch, Sascha , Helmrich, Christian , Hilpert, Johannes , Robilliard, Julien , Schmidt, Konstantin , Wilde, Stephan
IPC分类号： G10L19/20 , G10L21/038
CPC分类号： G10L19/24 , G10L19/20 , G10L19/26 , G10L19/265 , G10L21/038
摘要： An audio encoder for providing an encoded audio information on the basis of an input audio information comprises a low frequency encoder configured to encode a low frequency portion of the input audio information to obtain an encoded representation of the low frequency portion, and a bandwidth extension information provider configured to provide bandwidth extension information on the basis of the input audio information. The audio encoder is configured to selectively include bandwidth extension information into the encoded audio information in a signal-adaptive manner. An audio decoder comprises a low frequency decoder configured to decode an encoded representation of a low frequency portion to obtain a decoded representation of the low frequency portion, and a bandwidth extension configured to obtain a bandwidth extension signal using a blind bandwidth extension for portions of an audio content for which no bandwidth extension parameters are included in the encoded audio information, and to obtain the bandwidth extension signal using a parameter-guided bandwidth extension for portions of the audio content for which bandwidth extension parameters are included in the encoded audio information.
摘要翻译：用于输入音频信息的基础上的编码音频信息提供的音频编码器包括：被配置来编码的输入音频信息的低频部分以获得所述低频部分的编码表示的低频编码器，以及一个带宽扩展信息供应商配置为提供的输入音频信息的基础上，带宽扩展的信息。该音频编码器被配置为选择性包括带宽扩展信息转换成一个信号自适应的方式编码的音频信息。音频解码器包括经配置以解码为低频部分的编码表示，以获得所述低频部分的一个解码的表示的低频解码器和带宽扩展配置成使用盲带宽扩展，以获得带宽扩展信号的一个部分对于没有带宽扩展参数被包括在编码的音频信息，并获得使用用于哪个带宽扩展参数的音频内容的部分的参数制导带宽扩展带宽扩展信号的音频内容被包括在编码的音频信息。

10. 发明公开

EP2980792A1 Apparatus and method for generating an enhanced signal using independent noise-filling 审中-公开
标题翻译：装置和方法用于产生具有独立噪声填充增强信号
公开(公告)号：EP2980792A1
公开(公告)日：2016-02-03
申请号：EP14178777.0
申请日：2014-07-28
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： Disch, Sascha , Geiger, Ralf , Niedermeier, Andreas , Neusinger, Matthias , Schmidt, Konstantin , Wilde, Stephan , Schubert, Benjamin , Neukam, Christian
IPC分类号： G10L19/028 , G10L21/038
CPC分类号： G10L19/028 , G10L19/0204 , G10L21/038 , G10L25/21
摘要： An apparatus for generating an enhanced signal from an input signal (600), wherein the enhanced signal has spectral values for an enhancement spectral region, the spectral values for the enhancement spectral regions not being contained in the input signal (600), comprises a mapper (602) for mapping a source spectral region of the input signal to a target region in the enhancement spectral region, the source spectral region comprising a noise-filling region (302); and a noise filler (604) configured for generating first noise values for the noise-filling region (302) in the source spectral region of the input signal and for generating second noise values for a noise region in the target region, wherein the second noise values are decorrelated from the first noise values or for generating second noise values for a noise region in the target region, wherein the second noise values are decorrelated from first noise values in the source region.
摘要翻译：在增强的信号从在worin增强的信号输入信号（600）产生一个设备具有增强的光谱区域用于频谱值，不被包含在输入信号（600）增强的频谱区的频谱值包括映射器（602），用于在增强频谱区域中的输入信号的源光谱区域映射到目标区，在源光谱区域包括噪声填充区域（302）; 并且被配置为产生用于在所述输入信号的源光谱区域的噪声填充区域（302）的第一噪声值，并用于在所述目标区域中的噪声区域中产生第二噪声值，worin第二噪声的噪声填充（604）值从第一噪声值或用于在所述目标区域中的噪声区域产生第二噪声值，worin第二噪声值从在所述源极区的第一噪声值被去相关去相关。

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