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1. 发明授权

US09275652B2 Device and method for manipulating an audio signal having a transient event 有权
公开(公告)号：US09275652B2
公开(公告)日：2016-03-01
申请号：US12921550
申请日：2009-02-17
申请人： Sascha Disch , Frederik Nagel , Nikolaus Rettelbach , Markus Multrus , Guillaume Fuchs
发明人： Sascha Disch , Frederik Nagel , Nikolaus Rettelbach , Markus Multrus , Guillaume Fuchs
IPC分类号： G06F17/00 , G10L21/04 , G10L19/025
CPC分类号： G10L21/04 , G10L19/025
摘要： A signal manipulator for manipulating an audio signal having a transient event may have a transient remover, a signal processor and a signal inserter for inserting a time portion in a processed audio signal at a signal location where the transient event was removed before processing by the transient remover, so that a manipulated audio signal has a transient event not influenced by the processing, whereby the vertical coherence of the transient event is maintained instead of any processing performed in the signal processor, which would destroy the vertical coherence of a transient.

2. 发明授权

US08898068B2 Audio encoder, audio decoder, method for encoding and audio information, method for decoding an audio information and computer program using a modification of a number representation of a numeric previous context value 有权
标题翻译：音频编码器，音频解码器，用于编码和音频信息的方法，使用数字上一个上下文值的数字表示的修改来解码音频信息的方法和计算机程序
公开(公告)号：US08898068B2
公开(公告)日：2014-11-25
申请号：US13547664
申请日：2012-07-12
申请人： Vignesh Subbaraman , Guillaume Fuchs , Markus Multrus , Nikolaus Rettelbach , Oliver Weiss , Marc Gayer , Patrick Warmbold , Christian Griebel
发明人： Vignesh Subbaraman , Guillaume Fuchs , Markus Multrus , Nikolaus Rettelbach , Oliver Weiss , Marc Gayer , Patrick Warmbold , Christian Griebel
IPC分类号： G10L21/00 , G10L19/00 , G10L19/02
CPC分类号： G10L19/02 , G10L19/0017 , G10L19/002
摘要： An audio decoder includes an arithmetic decoder for providing decoded spectral values on the basis of an arithmetically-encoded representation of the spectral values and a frequency-domain-to-time-domain converter for providing a time-domain audio representation using the decoded spectral values. The arithmetic decoder selects a mapping rule describing a mapping of a code value onto a symbol code in dependence on a context state described by a numeric current context value, and determines the numeric current context value in dependence on a plurality of previously-decoded spectral values. The arithmetic decoder modifies a number representation of a numeric previous context value, describing a context state associated with one or more previously decoded spectral values, in dependence on a context subregion value, to acquire a number representation of a numeric current context value describing a context state associated with one or more spectral values to be decoded. An audio encoder uses a similar concept.
摘要翻译：音频解码器包括用于根据频谱值的算术编码表示提供解码频谱值的算术解码器和用于使用解码频谱值提供时域音频表示的频域 - 时域转换器。算术解码器根据由数字当前上下文值描述的上下文状态来选择描述代码值到符号代码上的映射规则，并根据多个先前解码的频谱值确定数字当前上下文值。算术解码器根据上下文子区域修改数字前一上下文值的数字表示，描述与一个或多个先前解码的频谱值相关联的上下文状态，以获取描述上下文的数字当前上下文值的数字表示状态与要解码的一个或多个频谱值相关联。音频编码器使用类似的概念。

3. 发明授权

US08751246B2 Audio encoder and decoder for encoding frames of sampled audio signals 有权
标题翻译：用于编码采样音频信号帧的音频编码器和解码器
公开(公告)号：US08751246B2
公开(公告)日：2014-06-10
申请号：US13004335
申请日：2011-01-11
申请人： Jeremie Lecomte , Philippe Gournay , Stefan Bayer , Markus Multrus , Nikolaus Rettelbach
发明人： Jeremie Lecomte , Philippe Gournay , Stefan Bayer , Markus Multrus , Nikolaus Rettelbach
IPC分类号： G10L19/00 , G10L19/02 , G10L19/04
CPC分类号： G10L19/20
摘要： An audio encoder adapted for encoding frames of a sampled audio signal to obtain encoded frames, wherein a frame has a number of time domain audio samples, having a predictive coding analysis stage for determining information on coefficients of a synthesis filter and information on a prediction domain frame based on a frame of audio samples. The audio encoder further has a frequency domain transformer for transforming a frame of audio samples to the frequency domain to obtain a frame spectrum and an encoding domain decider for deciding whether encoded data for a frame is based on the information on the coefficients and on the information on the prediction domain frame, or based on the frame spectrum. Moreover, the audio encoder has a controller for determining an information on a switching coefficient when the encoding domain decider decides that encoded data of a current frame is based on the information on the coefficients and the information on the prediction domain frame when encoded data of a previous frame was encoded based on a previous frame spectrum and a redundancy reducing encoder for encoding the information on the prediction domain frame, the information on the coefficients, the information on the switching coefficient and/or the frame spectrum.
摘要翻译：一种音频编码器，用于对采样的音频信号的帧进行编码以获得编码的帧，其中帧具有多个时域音频样本，具有用于确定关于合成滤波器的系数的信息的预测编码分析阶段和关于预测域的信息基于一帧音频样本。音频编码器还具有用于将音频样本的帧变换到频域以获得帧频的频域变换器，以及用于决定帧的编码数据是否基于关于系数和信息的信息的编码域决定器在预测域帧上，或基于帧频谱。此外，音频编码器具有控制器，用于当编码域决定器根据关于系数的信息和关于预测域帧的信息确定当前帧的编码数据时，确定关于切换系数的信息，当编码数据前一帧是基于先前的帧频编码的，并且用于对预测域帧上的信息进行编码的冗余减少编码器，关于系数的信息，关于切换系数和/或帧频谱的信息。

4. 发明申请

US20130013322A1 AUDIO ENCODER, AUDIO DECODER, METHOD FOR ENCODING AND DECODING AN AUDIO INFORMATION, AND COMPUTER PROGRAM OBTAINING A CONTEXT SUB-REGION VALUE ON THE BASIS OF A NORM OF PREVIOUSLY DECODED SPECTRAL VALUES 有权
标题翻译：音频编码器，音频解码器，用于编码和解码音频信息的方法以及基于先前解码的频谱值的正态分布获取上下文分区值的计算机程序
公开(公告)号：US20130013322A1
公开(公告)日：2013-01-10
申请号：US13547640
申请日：2012-07-12
申请人： Guillaume Fuchs , Markus Multrus , Nikolaus Rettelbach , Vignesh Subbaraman , Oliver Weiss , Marc Gayer , Patrick Warmbold , Christian Griebel
发明人： Guillaume Fuchs , Markus Multrus , Nikolaus Rettelbach , Vignesh Subbaraman , Oliver Weiss , Marc Gayer , Patrick Warmbold , Christian Griebel
IPC分类号： G10L19/00
CPC分类号： G10L19/02 , G10L19/0017 , G10L19/002
摘要： An audio decoder has an arithmetic decoder for providing decoded spectral values on the basis of an arithmetically-encoded representation and a frequency-domain-to-time-domain converter for providing a time-domain audio representation. The arithmetic decoder selects a mapping rule describing a mapping of a code value onto a symbol code in dependence on a context state described by a numeric current context value which is determined in dependence on previously decoded spectral values. The arithmetic decoder obtains a plurality of context subregion values on the basis of previously decoded spectral values and derives a numeric current context value associated with one or more spectral values to be decoded in dependence on stored context subregion values. The arithmetic decoder computes the norm of a vector formed by a plurality of previously decoded spectral values in order to obtain a common context subregion value. An audio encoder uses a similar concept.
摘要翻译：音频解码器具有算术解码器，用于基于算术编码的表示提供解码的频谱值，以及用于提供时域音频表示的频域 - 时域转换器。算术解码器根据由根据先前解码的频谱值确定的数字当前上下文值描述的上下文状态来选择描述代码值到符号代码上的映射规则的映射规则。算术解码器基于先前解码的频谱值获得多个上下文子区域值，并且根据存储的上下文子区域值导出与待解码的一个或多个频谱值相关联的数字当前上下文值。算术解码器计算由多个先前解码的频谱值形成的矢量的范数，以便获得公共的上下文子区域值。音频编码器使用类似的概念。

5. 发明申请

US20120271644A1 AUDIO SIGNAL ENCODER, AUDIO SIGNAL DECODER, METHOD FOR ENCODING OR DECODING AN AUDIO SIGNAL USING AN ALIASING-CANCELLATION 有权
标题翻译：音频信号编码器，音频信号解码器，使用消息取消来编码或解码音频信号的方法
公开(公告)号：US20120271644A1
公开(公告)日：2012-10-25
申请号：US13449949
申请日：2012-04-18
申请人： Bruno Bessette , Max Neuendorf , Ralf Geiger , Philippe Gournay , Roch Lefebvre , Bernhard Grill , Jeremie Lecomte , Stefan Bayer , Nikolaus Rettelbach , Lars Villemoes , Redwan Salami , Albertus C. Den Brinker
发明人： Bruno Bessette , Max Neuendorf , Ralf Geiger , Philippe Gournay , Roch Lefebvre , Bernhard Grill , Jeremie Lecomte , Stefan Bayer , Nikolaus Rettelbach , Lars Villemoes , Redwan Salami , Albertus C. Den Brinker
IPC分类号： G10L19/12
CPC分类号： G10L19/03 , G10L19/0212 , G10L19/20 , G10L2019/0008
摘要： An audio signal decoder includes a transform domain path configured to obtain a time-domain representation of a portion of an audio content on the basis of a first set of spectral coefficients, a representation of an aliasing-cancellation stimulus signal and a plurality of linear-prediction-domain parameters. The transform domain path applies a spectrum shaping to the first set of spectral coefficients to obtain a spectrally-shaped version thereof. The transform domain path obtains a time-domain representation of the audio content on the basis of the spectrally-shaped version of the first set of spectral coefficients. The transform domain path includes an aliasing-cancellation stimulus filter to filter the aliasing-cancellation stimulus signal in dependence on at least a subset of the linear-prediction-domain parameters. The transform domain path also includes a combiner configured to combine the time-domain representation of the audio content with an aliasing-cancellation synthesis signal to obtain an aliasing reduced time-domain signal.
摘要翻译：音频信号解码器包括变换域路径，被配置为基于第一组频谱系数获得音频内容的一部分的时域表示，混叠取消激励信号的表示和多个线性 - 预测域参数。变换域路径将频谱整形应用于第一组频谱系数，以获得其频谱形状的版本。变换域路径基于第一组频谱系数的频谱形式获得音频内容的时域表示。变换域路径包括混叠消除刺激滤波器，以根据线性预测域参数的至少一个子集来滤除混叠消除激励信号。变换域路径还包括组合器，其被配置为将音频内容的时域表示与混叠消除合成信号组合以获得混叠减小的时域信号。

6. 发明授权

US08275626B2 Apparatus and a method for decoding an encoded audio signal 有权
标题翻译：用于解码编码音频信号的装置和方法
公开(公告)号：US08275626B2
公开(公告)日：2012-09-25
申请号：US13004272
申请日：2011-01-11
申请人： Max Neuendorf , Bernhard Grill , Ulrich Kraemer , Markus Multrus , Harald Popp , Nikolaus Rettelbach , Frederik Nagel , Markus Lohwasser , Marc Gayer , Manuel Jander , Virgilio Bacigalupo
发明人： Max Neuendorf , Bernhard Grill , Ulrich Kraemer , Markus Multrus , Harald Popp , Nikolaus Rettelbach , Frederik Nagel , Markus Lohwasser , Marc Gayer , Manuel Jander , Virgilio Bacigalupo
IPC分类号： G10L19/00
CPC分类号： G10L21/038 , G10L19/008 , G10L19/0212 , G10L19/022 , G10L19/20 , G10L21/04
摘要： An apparatus for decoding an encoded audio signal having first and second portions encoded in accordance with first and second encoding algorithms, respectively, BWE parameters for the first and second portions and a coding mode information indicating a first or a second decoding algorithm, includes first and second decoders, a BWE module and a controller. The decoders decode portions in accordance with decoding algorithms for time portions of the encoded signal to obtain decoded signals. The BWE module has a controllable crossover frequency and is configured for performing a bandwidth extension algorithm using the first decoded signal and the BWE parameters for the first portion, and for performing a bandwidth extension algorithm using the second decoded signal and the bandwidth extension parameter for the second portion. The controller controls the crossover frequency for the BWE module in accordance with the coding mode information.
摘要翻译：一种用于解码具有根据第一和第二编码算法编码的第一和第二部分的编码音频信号的装置，分别用于第一和第二部分的BWE参数和指示第一或第二解码算法的编码模式信息包括第一和第二编码算法第二解码器，BWE模块和控制器。解码器根据编码信号的时间部分的解码算法来解码部分，以获得解码信号。 BWE模块具有可控的交叉频率，并且被配置为使用第一解码信号和第一部分的BWE参数来执行带宽扩展算法，并且用于使用第二解码信号和带宽扩展参数来执行带宽扩展算法第二部分。控制器根据编码模式信息控制BWE模块的交叉频率。

7. 发明申请

US20110200198A1 Low Bitrate Audio Encoding/Decoding Scheme with Common Preprocessing 有权
标题翻译：具有通用预处理的低比特率音频编码/解码方案
公开(公告)号：US20110200198A1
公开(公告)日：2011-08-18
申请号：US13004453
申请日：2011-01-11
申请人： Bernhard Grill , Stefan Bayer , Guillaume Fuchs , Stefan Geyersberger , Ralf Geiger , Johannes Hilpert , Ulrich Kraemer , Jeremie Lecomte , Markus Multrus , Max Neuendorf , Harald Popp , Nikolaus Rettelbach , Frederik Nagel , Sascha Disch , Juergen Herre , Yoshikazu Yokotani , Stefan Wabnik , Gerald Schuller , Jens Hirschfeld
发明人： Bernhard Grill , Stefan Bayer , Guillaume Fuchs , Stefan Geyersberger , Ralf Geiger , Johannes Hilpert , Ulrich Kraemer , Jeremie Lecomte , Markus Multrus , Max Neuendorf , Harald Popp , Nikolaus Rettelbach , Frederik Nagel , Sascha Disch , Juergen Herre , Yoshikazu Yokotani , Stefan Wabnik , Gerald Schuller , Jens Hirschfeld
IPC分类号： G10L19/14 , G10L21/00
CPC分类号： G10L19/173 , G10L19/0017 , G10L19/008 , G10L19/0212 , G10L19/18 , G10L2019/0008
摘要： An audio encoder has a common preprocessing stage, an information sink based encoding branch such as spectral domain encoding branch, a information source based encoding branch such as an LPC-domain encoding branch and a switch for switching between these branches at inputs into these branches or outputs of these branches controlled by a decision stage. An audio decoder has 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：音频编码器具有通用的预处理级，诸如频域编码分支的基于信息宿的编码分支，诸如LPC域编码分支的基于信息源的编码分支以及用于在这些分支的输入处切换这些分支之间的切换，或这些分支的输出由决策阶段控制。音频解码器具有频域解码分支，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。

8. 发明申请

US20110173007A1 Audio Encoder and Audio Decoder 有权
标题翻译：音频编码器和音频解码器
公开(公告)号：US20110173007A1
公开(公告)日：2011-07-14
申请号：US13004282
申请日：2011-01-11
申请人： Markus Multrus , Bernhard Grill , Guillaume Fuchs , Stefan Geyersberger , Nikolaus Rettelbach , Virgilio Bacigalupo
发明人： Markus Multrus , Bernhard Grill , Guillaume Fuchs , Stefan Geyersberger , Nikolaus Rettelbach , Virgilio Bacigalupo
IPC分类号： G10L19/00
CPC分类号： G10L19/02 , G10L19/022 , H03M7/30
摘要： An audio encoder for encoding segments of coefficients, the segments of coefficients representing different time or frequency resolutions of a sampled audio signal, the audio encoder including a processor for deriving a coding context for a currently encoded coefficient of a current segment based on a previously encoded coefficient of a previous segment, the previously encoded coefficient representing a different time or frequency resolution than the currently encoded coefficient. The audio encoder further includes an entropy encoder for entropy encoding the current coefficient based on the coding context to obtain an encoded audio stream.
摘要翻译：一种用于对系数段进行编码的音频编码器，表示采样音频信号的不同时间或频率分辨率的系数段，音频编码器包括用于基于先前编码的当前段的当前编码系数导出编码上下文的处理器前一段的系数，先前编码的系数表示与当前编码系数不同的时间或频率分辨率。音频编码器还包括熵编码器，用于基于编码上下文对当前系数进行熵编码，以获得经编码的音频流。

9. 发明申请

US20110173006A1 Audio Signal Synthesizer and Audio Signal Encoder 有权
标题翻译：音频信号合成器和音频信号编码器
公开(公告)号：US20110173006A1
公开(公告)日：2011-07-14
申请号：US13004248
申请日：2011-01-11
申请人： Frederik Nagel , Sascha Disch , Nikolaus Rettelbach , Max Neuendorf , Bernhard Grill , Ulrich Kraemer , Stefan Wabnik
发明人： Frederik Nagel , Sascha Disch , Nikolaus Rettelbach , Max Neuendorf , Bernhard Grill , Ulrich Kraemer , Stefan Wabnik
IPC分类号： G10L19/00
CPC分类号： G10L21/038 , G10L19/02
摘要： 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 and comprises a patch generator, a spectral converter, a raw signal processor and a combiner. The patch generator performs at least two different patching algorithms, each patching algorithm generating a raw signal. The patch generator is adapted to select one of the at least two different patching algorithms in response to a control information. 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.
摘要翻译：音频信号合成器生成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，并且包括片生成器，频谱转换器，原始信号处理器和组合器。补丁生成器执行至少两种不同的修补算法，每个修补算法生成原始信号。补丁生成器适于响应于控制信息来选择至少两个不同的修补算法之一。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。

10. 发明申请

US20100262420A1 AUDIO ENCODER FOR ENCODING AN AUDIO SIGNAL HAVING AN IMPULSE-LIKE PORTION AND STATIONARY PORTION, ENCODING METHODS, DECODER, DECODING METHOD, AND ENCODING AUDIO SIGNAL 有权
标题翻译：用于编码具有脉冲样部分和静止部分的音频信号的编码器，编码方法，解码器，解码方法和编码音频信号
公开(公告)号：US20100262420A1
公开(公告)日：2010-10-14
申请号：US12663828
申请日：2008-06-05
申请人： Juergen Herre , Ralf Geiger , Stefan Bayer , Guillaume Fuchs , Ulrich Kraemer , Nikolaus Rettelbach , Bernhard Grill
发明人： Juergen Herre , Ralf Geiger , Stefan Bayer , Guillaume Fuchs , Ulrich Kraemer , Nikolaus Rettelbach , Bernhard Grill
IPC分类号： G10L19/00
CPC分类号： G10L19/20
摘要： An audio encoder for encoding an audio signal includes an impulse extractor for extracting an impulse-like portion from the audio signal. This impulse-like portion is encoded and forwarded to an output interface. Furthermore, the audio encoder includes a signal encoder which encodes a residual signal derived from the original audio signal so that the impulse-like portion is reduced or eliminated in the residual audio signal. The output interface forwards both, the encoded signals, i.e., the encoded impulse signal and the encoded residual signal for transmission or storage. On the decoder-side, both signal portions are separately decoded and then combined to obtain a decoded audio signal.
摘要翻译：用于对音频信号进行编码的音频编码器包括用于从音频信号中提取脉冲状部分的脉冲提取器。该脉冲状部分被编码并转发到输出接口。此外，音频编码器包括信号编码器，其对从原始音频信号导出的残留信号进行编码，从而在残留音频信号中减少或消除脉冲状部分。输出接口转发编码的信号，即编码的脉冲信号和编码的残留信号用于传输或存储。在解码器侧，两个信号部分被单独解码，然后被组合以获得解码的音频信号。

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