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    Audio encoder/decoder with switching between first and second encoders/decoders using first and second framing rules
    1.
    发明授权
    Audio encoder/decoder with switching between first and second encoders/decoders using first and second framing rules 有权
    音频编码器/解码器，其使用第一和第二成帧规则在第一和第二编码器/解码器之间切换

    公开(公告)号：US08892449B2

    公开(公告)日：2014-11-18

    申请号：US13004400

    申请日：2011-01-11

    申请人： Jeremie Lecomte ,  Philippe Gournay ,  Stefan Bayer ,  Markus Multrus ,  Bruno Bessette ,  Bernhard Grill

    发明人： Jeremie Lecomte ,  Philippe Gournay ,  Stefan Bayer ,  Markus Multrus ,  Bruno Bessette ,  Bernhard Grill

    IPC分类号： G10L19/00 ,  G10L19/022 ,  G10L19/20

    CPC分类号： G10L19/20 ,  G10L19/022

    摘要： An audio encoder for encoding audio samples has a first time domain aliasing introducing encoder configured to decode audio samples in a first encoding domain and having a first framing rule, a start window and a stop window. The audio encoder further has a second encoder configured to encode samples in a second encoding domain and having a predetermined frame size number of audio samples, and a coding warm-up period number of audio samples, the second encoder having a different second framing rule, a frame of the second encoder being an encoded representation of a number of successive audio samples that is equal to the predetermined frame size number of audio samples. The audio encoder further has a controller switching from the first to the second encoder and for modifying the second framing rule or for modifying the start or the stop window of the first encoder.

    摘要翻译： 用于编码音频样本的音频编码器具有第一时域混叠引入编码器，其被配置为对第一编码域中的音频样本进行解码，并且具有第一成帧规则，起始窗口和停止窗口。 音频编码器还具有第二编码器，其被配置为对第二编码域中的样本进行编码并具有预定的帧大小的音频样本，以及编码预热周期数量的音频样本，第二编码器具有不同的第二成帧规则， 第二编码器的帧是等于音频样本的预定帧大小数目的多个连续音频采样的编码表示。 音频编码器还具有从第一编码器切换到第二编码器并且用于修改第二成帧规则或用于修改第一编码器的起始或停止窗口的控制器。

    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
    2.
    发明授权
    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
    音频编码器，音频解码器，用于对音频信息进行编码和解码的方法，以及基于先前解码的频谱值的范数获得上下文子区域值的计算机程序

    公开(公告)号：US08682681B2

    公开(公告)日：2014-03-25

    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 ,  G10L21/06

    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。

    Audio encoder, audio decoder, method for encoding an audio information, method for decoding an audio information and computer program using a region-dependent arithmetic coding mapping rule
    4.
    发明授权
    Audio encoder, audio decoder, method for encoding an audio information, method for decoding an audio information and computer program using a region-dependent arithmetic coding mapping rule 有权
    音频编码器，音频解码器，用于对音频信息进行编码的方法，使用区域依赖的算术编码映射规则解码音频信息的方法和计算机程序

    公开(公告)号：US08612240B2

    公开(公告)日：2013-12-17

    申请号：US13450699

    申请日：2012-04-19

    申请人： Guillaume Fuchs ,  Vignesh Subbaraman ,  Nikolaus Rettelbach ,  Markus Multrus ,  Marc Gayer ,  Patrick Warmbold ,  Christian Griebel ,  Oliver Weiss

    发明人： Guillaume Fuchs ,  Vignesh Subbaraman ,  Nikolaus Rettelbach ,  Markus Multrus ,  Marc Gayer ,  Patrick Warmbold ,  Christian Griebel ,  Oliver Weiss

    IPC分类号： G10L19/032

    CPC分类号： G10L19/008 ,  G10L19/0017 ,  G10L19/0208

    摘要： An audio decoder for providing a decoded audio information includes an arithmetic decoder for providing a plurality of 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 decoded spectral values. The arithmetic decoder is configured to select a mapping rule describing a mapping of a code value onto a symbol code in dependence on a context state. The arithmetic decoder is configured to determine a numeric current context value describing the current context state in dependence on a plurality of previously decoded spectral values and also in dependence on whether a spectral value to be decoded is in a first predetermined frequency region or in a second predetermined frequency region. An audio encoder provides an encoded audio information on the basis of an input audio information.

    摘要翻译： 用于提供解码音频信息的音频解码器包括算术解码器，用于根据频谱值的算术编码表示提供多个解码频谱值，以及频域 - 时域转换器，用于提供时间 - 使用解码频谱值的域音频表示。 算术解码器被配置为根据上下文状态选择描述代码值到符号代码上的映射规则的映射规则。 算术解码器被配置为根据多个先前解码的频谱值来确定描述当前上下文状态的数字当前上下文值，并且还根据要解码的频谱值是否处于第一预定频率区域或者在第二预定频率区域中 预定频率区域。 音频编码器基于输入的音频信息提供经编码的音频信息。

    MULTI-MODE AUDIO CODEC AND CELP CODING ADAPTED THEREFORE
    6.
    发明申请
    MULTI-MODE AUDIO CODEC AND CELP CODING ADAPTED THEREFORE 有权
    多模式音频编解码器和CELP编码适配器

    公开(公告)号：US20120253797A1

    公开(公告)日：2012-10-04

    申请号：US13449890

    申请日：2012-04-18

    申请人： Ralf Geiger ,  Guillaume Fuchs ,  Markus Multrus ,  Bernhard Grill

    发明人： Ralf Geiger ,  Guillaume Fuchs ,  Markus Multrus ,  Bernhard Grill

    IPC分类号： G10L19/04

    CPC分类号： G10L19/12 ,  G10L19/03 ,  G10L19/04 ,  G10L19/083 ,  G10L19/20 ,  G10L2019/0002

    摘要： In an embodiment, bitstream elements of sub-frames are encoded differentially to a global gain value so that a change of the global gain value results in an adjustment of an output level of the decoded representation of the audio content. Concurrently, the differential coding saves bits. Even further, the differential coding enables the lowering of the burden of globally adjusting the gain of an encoded bitstream. In another embodiment, a global gain control across CELP coded frames and transform coded frames is achieved by co-controlling the gain of the codebook excitation of the CELP codec, along with a level of the transform or inverse transform of the transform coded frames. In another embodiment, the gain value determination in CELP coding is performed in the weighted domain of the excitation signal.

    摘要翻译： 在一个实施例中，子帧的比特流元素被差分地编码为全局增益值，使得全局增益值的改变导致音频内容的解码表示的输出电平的调整。 同时，差分编码保存位。 此外，差分编码能够降低全局调整编码比特流的增益的负担。 在另一个实施例中，跨CELP编码帧和变换编码帧的全局增益控制与CELP编解码器的码本激励的增益以及变换编码帧的变换或逆变换的级别一起共同实现。 在另一实施例中，在激励信号的加权域中执行CELP编码中的增益值确定。

    AUDIO ENCODER, AUDIO DECODER, ENCODED AUDIO INFORMATION, METHODS FOR ENCODING AND DECODING AN AUDIO SIGNAL AND COMPUTER PROGRAM
    7.
    发明申请
    AUDIO ENCODER, AUDIO DECODER, ENCODED AUDIO INFORMATION, METHODS FOR ENCODING AND DECODING AN AUDIO SIGNAL AND COMPUTER PROGRAM 有权
    音频编码器，音频解码器，编码音频信息，编码和解码音频信号和计算机程序的方法

    公开(公告)号：US20120022881A1

    公开(公告)日：2012-01-26

    申请号：US13191246

    申请日：2011-07-26

    申请人： Ralf Geiger ,  Jeremie Lecomte ,  Markus Multrus ,  Max Neuendorf ,  Christian Spitzner

    发明人： Ralf Geiger ,  Jeremie Lecomte ,  Markus Multrus ,  Max Neuendorf ,  Christian Spitzner

    IPC分类号： G10L21/04

    CPC分类号： G10L19/167 ,  G10L19/0017 ,  G10L19/022 ,  G10L19/24

    摘要： An audio decoder for providing a decoded audio information on the basis of an encoded audio information includes a window-based signal transformer configured to map a time-frequency representation, which is described by the encoded audio information, to a time-domain representation. The window-based signal transformer is configured to select a window, out of a plurality of windows including windows of different transition slopes and windows of different transform length, on the basis of a window information. The audio decoder includes a window selector configured to evaluate a variable-codeword-length window information in order to select a window for a processing of a given portion of the time-frequency representation associated with a given frame of the audio information.

    摘要翻译： 用于基于编码的音频信息提供经解码的音频信息的音频解码器包括：基于窗口的信号变换器，被配置为将由编码的音频信息描述的时间频率表示映射到时域表示。 基于窗口的信号变换器被配置为基于窗口信息来选择包括不同转换斜率的窗口的多个窗口和不同变换长度的窗口中的窗口。 音频解码器包括窗口选择器，其被配置为评估可变码字长度窗口信息，以便选择用于处理与音频信息的给定帧相关联的时间 - 频率表示的给定部分的窗口。

    Audio Decoder, Audio Encoder, Methods for Decoding and Encoding an Audio Signal and Computer Program
    10.
    发明申请
    Audio Decoder, Audio Encoder, Methods for Decoding and Encoding an Audio Signal and Computer Program 有权
    音频解码器，音频编码器，解码和编码音频信号和计算机程序的方法

    公开(公告)号：US20100217607A1

    公开(公告)日：2010-08-26

    申请号：US12694912

    申请日：2010-01-27

    申请人： Max Neuendorf ,  Jeremie Lecomte ,  Markus Multrus ,  Stefan Bayer ,  Frederik Nagel ,  Guillaume Fuchs ,  Julien Robilliard ,  Nikolaus Rettelbach ,  Ralf Geiger ,  Bernhard Grill

    发明人： Max Neuendorf ,  Jeremie Lecomte ,  Markus Multrus ,  Stefan Bayer ,  Frederik Nagel ,  Guillaume Fuchs ,  Julien Robilliard ,  Nikolaus Rettelbach ,  Ralf Geiger ,  Bernhard Grill

    IPC分类号： G06F17/00

    CPC分类号： G10L19/022 ,  G10L19/20

    摘要： An audio decoder for providing a decoded representation of an audio content on the basis of an encoded representation of the audio content comprises a linear-prediction-domain decoder core configured to provide a time-domain representation of an audio frame on the basis of a set of linear-prediction domain parameters associated with the audio frame and a frequency-domain decoder core configured to provide a time-domain representation of an audio frame on the basis of a set of frequency-domain parameters, taking into account a transform window out of a set comprising a plurality of different transform windows. The audio decoder comprises a signal combiner configured to overlap-and-add-time-domain representations of subsequent audio frames encoded in different domains, in order to smoothen a transition between the time-domain representations of the subsequent frames. The set of transform windows comprises one or more windows specifically adapted for a transition between a frequency-domain core mode and a linear-prediction-domain core mode.

    摘要翻译： 一种音频解码器，用于基于音频内容的编码表示来提供音频内容的解码表示，包括线性预测域解码器核心，被配置为基于一组设置提供音频帧的时域表示 与所述音频帧相关联的线性预测域参数和频域解码器核心，所述频域解码器核心被配置为基于一组频域参数来提供音频帧的时域表示，其考虑从 一组包括多个不同的变换窗口。 音频解码器包括信号组合器，其被配置为对在不同域中编码的后续音频帧进行重叠和相加时域表示，以平滑后续帧的时域表示之间的转换。 变换窗口集合包括一个或多个窗口，其特别适用于频域核心模式和线性预测域核心模式之间的转换。