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    AUDIO ENCODER AND DECODER FOR ENCODING AND DECODING AUDIO SAMPLES
    4.
    发明公开
    AUDIO ENCODER AND DECODER FOR ENCODING AND DECODING AUDIO SAMPLES 有权
    用于编码和解码音频样本的音频编码器和解码器

    公开(公告)号：EP3002750A1

    公开(公告)日：2016-04-06

    申请号：EP15193588.9

    申请日：2009-06-26

    申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

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

    IPC分类号： G10L19/022 ,  G10L19/20

    CPC分类号： G10L19/20 ,  G10L19/022

    摘要： An audio encoder (100) for encoding audio samples, comprising a first time domain aliasing introducing encoder (110) for decoding audio samples in a first encoding domain, the first time domain aliasing introducing encoder (110) having a first framing rule, a start window and a stop window. The audio encoder (100) further comprises a second encoder (120) for encoding samples in a second encoding domain, the second encoder (120) having a predetermined frame size number of audio samples, and a coding warm-up period number of audio samples, the second encoder (120) having a different second framing rule, a frame of the second encoder (120) being an encoded representation of a number of timely subsequent audio samples, the number being equal to the predetermined frame size number of audio samples. The audio encoder (100) further comprises a controller (130) switching from the first encoder (110) to the second encoder (120) in response to characteristic of the audio samples, and for modifying the second framing rule in response to switching from the first encoder (110) to the second encoder (120) or for modifying the start window or the stop window of the first encoder (110), wherein the second framing rule remains unmodified.

    摘要翻译： 一种用于对音频样本进行编码的音频编码器（100），包括：第一时域混叠引入编码器（110），用于对第一编码域中的音频样本进行解码;第一时域混叠引入编码器（110），具有第一成帧规则; 窗口和停止窗口。 音频编码器（100）还包括用于对第二编码域中的采样进行编码的第二编码器（120），第二编码器（120）具有预定帧大小数量的音频采样以及音频采样的编码预热时段数量 ，所述第二编码器（120）具有不同的第二成帧规则，所述第二编码器（120）的帧是多个及时后续音频样本的编码表示，所述数量等于所述预定帧大小数量的音频样本。 音频编码器（100）还包括响应于音频采样的特性从第一编码器（110）切换到第二编码器（120）的控制器（130），以及响应于从第一编码器 第一编码器（110）发送到第二编码器（120）或用于修改第一编码器（110）的开始窗口或停止窗口，其中第二成帧规则保持不变。

    Audio transform coding using pitch correction
    6.
    发明公开
    Audio transform coding using pitch correction 审中-公开
    改造Basierte Audiokodierung手套Grundfrequenzkorrektur

    公开(公告)号：EP2107556A1

    公开(公告)日：2009-10-07

    申请号：EP08021298.8

    申请日：2008-12-08

    申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

    发明人： Edler, Bernd ,  Disch, Sascha ,  Geiger, Ralf ,  Bayer, Stefan ,  Kraemer, Ulrich ,  Fuchs, Guillaume ,  Neuendorf, Max ,  Multrus, Markus ,  Schuller, Gerald ,  Popp, Harald

    IPC分类号： G10L19/02

    CPC分类号： G10L19/0212 ,  G10L19/022

    摘要： A processed representation of an audio signal having a sequence of frames is generated by sampling the audio signal within a first and a second frame of the sequence of frames, the second frame following the first frame, the sampling using information on a pitch contour of the first and the second frame to derive a first sampled representation. The audio signal is sampled within the second and the third frame, the third frame following the second frame in the sequence of frames. The sampling uses the information on the pitch contour of the second frame and information on a pitch contour of the third frame to derive a second sampled representation. A first scaling window is derived for the first sampled representation and a second scaling window is derived for the second sampled representation, the scaling windows depending on the samplings applied to derive the first sampled representations or the second sampled representation.

    摘要翻译： 通过对帧序列的第一帧和第二帧中的音频信号进行采样，在第一帧之后的第二帧，利用关于帧的轮廓轮廓的信息进行采样来生成具有帧序列的音频信号的处理表示 第一和第二帧以得出第一采样表示。 音频信号在第二帧和第三帧中采样，第三帧在帧序列中的第二帧之后。 采样使用关于第二帧的音调轮廓的信息和关于第三帧的音调轮廓的信息来导出第二采样表示。 对于第一采样表示导出第一缩放窗口，并且针对第二采样表示导出第二缩放窗口，缩放窗口取决于应用于导出第一采样表示或第二采样表示的采样。

    APPARATUS AND METHOD FOR ENCODING OR DECODING A MULTI-CHANNEL SIGNAL USING SPECTRAL-DOMAIN RESAMPLING
    7.
    发明公开
    APPARATUS AND METHOD FOR ENCODING OR DECODING A MULTI-CHANNEL SIGNAL USING SPECTRAL-DOMAIN RESAMPLING 审中-公开

    公开(公告)号：EP3503097A2

    公开(公告)日：2019-06-26

    申请号：EP19157001.9

    申请日：2017-01-20

    申请人： FRAUNHOFER-GESELLSCHAFT zur Förderung der angewandten Forschung e.V.

    发明人： Fuchs, Guillaume ,  Ravelli, Emmanuel ,  Multrus, Markus ,  Schnell, Markus ,  Döhla, Stefan ,  Dietz, Martin ,  Markovic, Goran ,  Fotopoulou, Eleni ,  Bayer, Stefan ,  Jaegers, Wolfgang

    IPC分类号： G10L19/022 ,  G10L19/008 ,  G10L19/02

    CPC分类号： G10L19/008 ,  G10L19/02 ,  G10L19/022 ,  G10L19/04 ,  G10L25/18 ,  H04S3/008 ,  H04S2400/01 ,  H04S2400/03 ,  H04S2420/03

    摘要： An apparatus for encoding a multi-channel signal comprising at least two channels, comprises: a time-spectral converter (1000) for converting sequences of blocks of sample values of the at least two channels into a frequency domain representation having sequences of blocks of spectral values for the at least two channels, wherein a block of sampling values has an associated input sampling rate, and a block of spectral values of the sequences of blocks of spectral values has spectral values up to a maximum input frequency (1211) being related to the input sampling rate; a multi-channel processor (1010) for applying a joint multi-channel processing to the sequences of blocks of spectral values or to resampled sequences of blocks of spectral values to obtain at least one result sequence of blocks of spectral values comprising information related to the at least two channels; a spectral domain resampler (1020) for resampling the blocks of the result sequences in the frequency domain or for resampling the sequences of blocks of spectral values for the at least two channels in the frequency domain to obtain a resampled sequence of blocks of spectral values, wherein a block of the resampled sequence of blocks of spectral values has spectral values up to a maximum output frequency (1231, 1221) being different from the maximum input frequency (1211); a spectral-time converter for converting the resampled sequence of blocks of spectral values into a time domain representation or for converting the result sequence of blocks of spectral values into a time domain representation comprising an output sequence of blocks of sampling values having associated an output sampling rate being different from the input sampling rate; and a core encoder (1040) for encoding the output sequence of blocks of sampling values to obtain an encoded multi-channel signal (1510).

    Apparatus and method for generating a synthesis audio signal and for encoding an audio signal
    10.
    发明公开
    Apparatus and method for generating a synthesis audio signal and for encoding an audio signal 审中-公开
    装置和方法，用于产生合成音频信号和编码音频信号

    公开(公告)号：EP2239732A1

    公开(公告)日：2010-10-13

    申请号：EP09181008.5

    申请日：2009-12-30

    申请人： Fraunhofer-Gesellschaft zur Förderung der Angewandten Forschung e.V.

    发明人： Nagel, Frederik ,  Multrus, Markus ,  Lecomte, Jérémie ,  Bayer, Stefan ,  Fuchs, Guillaume ,  Hilpert,Johannes ,  Robilliard, Julien

    IPC分类号： G10L21/02 ,  G10L19/14

    CPC分类号： G10L19/008 ,  G10L19/18 ,  G10L21/038

    摘要： An apparatus for generating a synthesis audio signal using a patching control signal comprises a first converter, a spectral domain patch generator, a high frequency reconstruction manipulator and a combiner. The first converter is configured for converting a time portion of an audio signal into a spectral representation. The spectral domain patch generator is configured for performing a plurality of different spectral domain patching algorithms, wherein each patching algorithm generates a modified spectral representation comprising spectral components in an upper frequency band derived from corresponding spectral components in a core frequency band of the audio signal. The spectral domain patch generator is furthermore configured to select a first spectral domain patching algorithm from the plurality of patching algorithms for a first time portion and a second spectral domain patching algorithm from the plurality of patching algorithm for a second different time portion in accordance with the patching control signal to obtain the modified spectral representation. The high frequency reconstruction manipulator is configured for manipulating the modified spectral representation or a signal derived from the modified spectral representation in accordance with a spectral band replication parameter to obtain a bandwidth extended signal. Finally, the combiner is configured for combining the audio signal having spectral components in the core frequency band or a signal derived from the audio signal with the bandwidth extended signal to obtain the synthesis audio signal.

    摘要翻译： 用于使用修补控制信号产生一合成音频信号的装置包括：第一转换器，一频域修补发生器，一高频重建操纵器和组合器。 所述第一转换器被配置用于音频信号的时间部分转换为一频谱表示。 从在该音频信号的一核心频带对应的光谱分量的频域修补发生器被配置为执行不同的频域修补算法复数，worin每个修补算法基因速率的修改的频谱表示，其包括在上频率在频谱分量频带而得。 该频域修补发生器被进一步配置为选择第一频谱域从修补算法对于第一时间部分和从修补算法的多个A第二频域修补算法中的雅舞的第二不同时间部分的多元性修补算法 修补控制信号以获得所述修改的频谱表示。 该高频重建操控器被配置用于操纵所述修改的频谱表示或自修改的频谱表示在雅舞蹈衍生与频谱带复制参数的信号，以获得带宽扩展信号。 最后，组合器被配置为将具有在核心频带-或从与所述带宽扩展信号以获得合成音频信号的音频信号导出的信号的频谱分量的音频信号。