公开(公告)号：US08788276B2

公开(公告)日：2014-07-22

申请号：US12740610

申请日：2009-06-23

申请人： Max Neuendorf ,  Ulrich Kraemer ,  Frederik Nagel ,  Sascha Disch ,  Stefan Wabnik

发明人： Max Neuendorf ,  Ulrich Kraemer ,  Frederik Nagel ,  Sascha Disch ,  Stefan Wabnik

IPC分类号： G10L19/00

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 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 includes a spectral tilt detector 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，用于以所述音频信号的一系列帧的逐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。 该装置还包括一个光谱倾斜检测器，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。

公开(公告)号：US08731948B2

公开(公告)日：2014-05-20

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。

公开(公告)号：US20130218314A1

公开(公告)日：2013-08-22

申请号：US13593016

申请日：2012-08-23

申请人： Stefan WABNIK ,  Joerg PICKEL ,  Bert GREEVENBOSCH ,  Bernhard GRILL ,  Ernst EBERLEIN ,  Giovanni DEL GALDO ,  Stefan KRAEGELOH ,  Reinhard ZITZMANN ,  Tobias BLIEM ,  Marco BREILING ,  Juliane BORSUM

发明人： Stefan WABNIK ,  Joerg PICKEL ,  Bert GREEVENBOSCH ,  Bernhard GRILL ,  Ernst EBERLEIN ,  Giovanni DEL GALDO ,  Stefan KRAEGELOH ,  Reinhard ZITZMANN ,  Tobias BLIEM ,  Marco BREILING ,  Juliane BORSUM

IPC分类号： G10L19/018

CPC分类号： G10L19/018 ,  H04H20/14 ,  H04H60/29 ,  H04H60/33

摘要： A watermark signal provider provides a watermark signal suitable for being hidden in an audio signal when the watermark signal is added to the audio signal, such that the watermark signal represents watermark data. The watermark signal provider includes a psychoacoustical processor for determining a masking threshold of the audio signal; and a modulator for generating the watermark signal from a superposition of sample-shaping functions spaced apart from each other at a sample time interval of a time-discrete representation of the watermark data, each sample-shaping function being amplitude-weighted with a respective sample of the time-discrete representation, multiplied by a respective amplitude weight depending on the masking threshold, the modulator being configured such that the sample time interval is shorter than a time extension of the sample-shaping functions; and the respective amplitude weight also depends on samples of the time-discrete representation neighboring the respective sample in time.

摘要翻译： 当水印信号被添加到音频信号时，水印信号提供器提供适于隐藏在音频信号中的水印信号，使得水印信号表示水印数据。 水印信号提供器包括用于确定音频信号的掩蔽阈值的心理声学处理器; 以及调制器，用于在水印数据的时间离散表示的采样时间间隔处从彼此间隔开的采样整形功能的叠加产生水印信号，每个采样整形功能用相应样本进行幅度加权 所述时间离散表示根据掩蔽阈值乘以相应的幅度权重，所述调制器被配置为使得所述采样时间间隔短于所述采样整形功能的时间延长; 并且相应的振幅权重也取决于相应样本在时间上相邻的时间离散表示的样本。

公开(公告)号：US20110202337A1

公开(公告)日：2011-08-18

申请号：US13004534

申请日：2011-01-11

申请人： Guillaume Fuchs ,  Stefan Bayer ,  Jens Hirschfeld ,  Juergen Herre ,  Jeremie Lecomte ,  Frederik Nagel ,  Nikolaus Rettelbach ,  Stefan Wabnik ,  Yoshikazu Yokotani

发明人： Guillaume Fuchs ,  Stefan Bayer ,  Jens Hirschfeld ,  Juergen Herre ,  Jeremie Lecomte ,  Frederik Nagel ,  Nikolaus Rettelbach ,  Stefan Wabnik ,  Yoshikazu Yokotani

IPC分类号： G10L15/00

CPC分类号： G10L19/20 ,  G10L19/22 ,  G10L25/00 ,  G10L25/51 ,  G10L2025/783

摘要： For classifying different segments of a signal which has segments of at least a first type and second type, e.g. audio and speech segments, the signal is short-term classified on the basis of the at least one short-term feature extracted from the signal and a short-term classification result is delivered. The signal is also long-term classified on the basis of the at least one short-term feature and at least one long-term feature extracted from the signal and a long-term classification result is delivered. The short-term classification result and the long-term classification result are combined to provide an output signal indicating whether a segment of the signal is of the first type or of the second type.

摘要翻译： 用于分类具有至少第一类型和第二类型的段的信号的不同段，例如， 音频和语音段，信号是根据从信号中提取的至少一个短期特征进行短期分类的，并且传送短期分类结果。 信号也是基于至少一个短期特征和从该信号提取的至少一个长期特征和长期分类结果进行长期分类的。 组合短期分类结果和长期分类结果以提供指示信号的片段是第一类型还是第二类型的输出信号。

公开(公告)号：US20080004869A1

公开(公告)日：2008-01-03

申请号：US11428297

申请日：2006-06-30

申请人： Juergen Herre ,  Bernhard Grill ,  Markus Multrus ,  Stefan Bayer ,  Ulrich Kraemer ,  Jens Hirschfeld ,  Stefan Wabnik ,  Gerald Schuller

发明人： Juergen Herre ,  Bernhard Grill ,  Markus Multrus ,  Stefan Bayer ,  Ulrich Kraemer ,  Jens Hirschfeld ,  Stefan Wabnik ,  Gerald Schuller

IPC分类号： G10L19/14

CPC分类号： G10L19/22

摘要： An audio encoder, an audio decoder or an audio processor includes a filter for generating a filtered audio signal, the filter having a variable warping characteristic, the characteristic being controllable in response to a time-varying control signal, the control signal indicating a small or no warping characteristic or a comparatively high warping characteristic. Furthermore, a controller is connected for providing the time-varying control signal, which depends on the audio signal. The filtered audio signal can be introduced to an encoding processor having different encoding algorithms, one of which is a coding algorithm adapted to a specific signal pattern. Alternatively, the filter is a post-filter receiving a decoded audio signal.

摘要翻译： 音频编码器，音频解码器或音频处理器包括用于产生经滤波的音频信号的滤波器，该滤波器具有可变的翘曲特性，该特性可响应于时变控制信号而被控制，该控制信号指示小的或 无翘曲特性或较高翘曲特性。 此外，连接控制器以提供取决于音频信号的时变控制信号。 滤波后的音频信号可以被引入到具有不同编码算法的编码处理器中，其中之一是适用于特定信号模式的编码算法。 或者，滤波器是接收经解码的音频信号的后置滤波器。

公开(公告)号：US20070043557A1

公开(公告)日：2007-02-22

申请号：US11460433

申请日：2006-07-27

申请人： Gerald Schuller ,  Stefan Wabnik ,  Jens Hirschfeld ,  Wolfgang Fiesel

发明人： Gerald Schuller ,  Stefan Wabnik ,  Jens Hirschfeld ,  Wolfgang Fiesel

IPC分类号： G10L19/00

CPC分类号： G10L19/032 ,  G10L19/26 ,  G10L19/265

摘要： Quantizing an information signal of a sequence of information values includes frequency-selective filtering the sequence of information values to obtain a sequence of filtered information values and quantizing the filtered information values to obtain a sequence of quantized information values by means of a quantizing step function which maps the filtered information values to the quantized information values and the course of which is steeper below a threshold information value than above the threshold information value.

摘要翻译： 量化信息值序列的信息信号包括对信息值序列进行频率选择性滤波以获得滤波信息值序列，并对滤波信息值进行量化，以通过量化步长函数获得量化信息值序列，该量化步长函数 将经滤波的信息值映射到量化信息值，并且其过程比阈值信息值之上的阈值信息值更陡。

公开(公告)号：US20070016402A1

公开(公告)日：2007-01-18

申请号：US11460423

申请日：2006-07-27

申请人： Gerald SCHULLER ,  Stefan WABNIK ,  Jens HIRSCHFELD ,  Manfred LUTZKY

发明人： Gerald SCHULLER ,  Stefan WABNIK ,  Jens HIRSCHFELD ,  Manfred LUTZKY

IPC分类号： G10L19/00

CPC分类号： G10L19/02 ,  G10L19/0017 ,  G10L19/26 ,  G10L19/265

摘要： Coding an audio signal of a sequence of audio values into a coded signal includes determining a first listening threshold for a first block of audio values of the sequence of audio values and a second listening threshold for a second block of audio values of the sequence of audio values; calculating a version of a first parameterization of a parameterizable filter such that the transfer function thereof roughly corresponds to the inverse of the magnitude of the first listening threshold and a version of a second parameterization of the parameterizable filter such that the transfer function thereof roughly corresponds to the inverse of the magnitude of the second listening threshold; filtering a predetermined block of audio values of the sequence of audio values with the parameterizable filter using a predetermined parameterization which in a predetermined manner depends on the version of the second parameterization to obtain a block of filtered audio values corresponding to the predetermined block; quantizing the filtered audio values to obtain a block of quantized filtered audio values; forming a combination of the version of the first parameterization and the version of the second parameterization including at least a difference between the version of the first parameterization and the version of the second parameterization; and integrating information from which the quantized filtered audio values and a version of the first parameterization may be derived and which includes the combination into the coded signal.

摘要翻译： 将音频值序列的音频信号编码为编码信号包括确定音频值序列的音频值的第一块的第一收听阈值和音频序列的第二音频值块的第二收听阈值 价值观 计算可参数化滤波器的第一参数化的版本，使得其传递函数大致对应于第一监听阈值的幅度的倒数和可参数化滤波器的第二参数化的版本，使得其传递函数大致对应于 第二听阈的幅度的倒数; 使用预定参数化以预定方式取决于第二参数化的版本来获得与预定块相对应的滤波音频值的块，利用可参数化滤波器来过滤音频值序列的预定音频值块; 量化经滤波的音频值以获得量化滤波音频值的块; 形成所述第一参数化的版本和所述第二参数化的版本的组合，所述第二参数化的版本至少包括所述第一参数化的版本与所述第二参数化的版本之间的差异; 并且可以从其中导出量化的滤波音频值和第一参数化版本的信息，并将其包括在编码信号中。

公开(公告)号：US09754601B2

公开(公告)日：2017-09-05

申请号：US12300602

申请日：2007-02-28

申请人： Jens Hirschfeld ,  Gerald Schuller ,  Manfred Lutzky ,  Ulrich Kraemer ,  Stefan Wabnik

发明人： Jens Hirschfeld ,  Gerald Schuller ,  Manfred Lutzky ,  Ulrich Kraemer ,  Stefan Wabnik

IPC分类号： G10L19/06 ,  G10L19/032 ,  G10L19/00 ,  G10L19/035

CPC分类号： G10L19/06 ,  G10L19/0017 ,  G10L19/032 ,  G10L19/035

摘要： A very coarse quantization exceeding the measure determined by the masking threshold without or only very little quality losses is enabled by quantizing not immediately the prefiltered signal, but a prediction error obtained by forward-adaptive prediction of the prefiltered signal. Due to the forward adaptivity, the quantizing error has no negative effect on the prediction on the decoder side.

公开(公告)号：US09214159B2

公开(公告)日：2015-12-15

申请号：US13593999

申请日：2012-08-24

申请人： Reinhard Zitzmann ,  Stefan Wabnik ,  Joerg Pickel ,  Bert Greevenbosch ,  Bernhard Grill ,  Ernst Eberlein ,  Giovanni Del Galdo ,  Stefan Kraegeloh ,  Tobias Bliem ,  Juliane Borsum ,  Marco Breiling

发明人： Reinhard Zitzmann ,  Stefan Wabnik ,  Joerg Pickel ,  Bert Greevenbosch ,  Bernhard Grill ,  Ernst Eberlein ,  Giovanni Del Galdo ,  Stefan Kraegeloh ,  Tobias Bliem ,  Juliane Borsum ,  Marco Breiling

IPC分类号： G06F17/00 ,  G10L19/018

CPC分类号： G10L19/018

摘要： A watermark signal provider comprises a time-frequency-domain waveform provider to provide time-domain waveforms for a plurality of frequency subbands. The time-frequency-domain waveform provider is configured to map a given value of a time-frequency-domain representation onto a bit shaping function, a temporal extension of which is longer than a bit interval, such that there is a temporal overlap between bit shaped functions provided for temporally subsequent values of the time-frequency-domain representation of the same frequency subband. A time-domain waveform of a given frequency subband contains a plurality of bit shaped functions provided for temporally subsequent values of the time-frequency-domain representation. The water mark signal provider further has a time-domain waveform combiner.

摘要翻译： 水印信号提供器包括时频波形提供器，用于为多个频率子带提供时域波形。 时域波形提供器被配置为将时间 - 频域表示的给定值映射到位时间扩展长于比特间隔的比特整形功能，使得在比特之间存在时间重叠 为相同频率子带的时间 - 频域表示的时间上随后的值提供的形状函数。 给定频率子带的时域波形包含为时间 - 频域表示的时间上随后的值提供的多个位形函数。 水印信号提供者还具有时域波形组合器。

公开(公告)号：US08804970B2

公开(公告)日：2014-08-12

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： 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。