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。

公开(公告)号：US08484038B2

公开(公告)日：2013-07-09

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： G10L21/00 ,  G10L19/00

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。

公开(公告)号：US07813513B2

公开(公告)日：2010-10-12

申请号：US10599557

申请日：2005-03-25

申请人： Gerard H. Hotho ,  Dirk J. Breebaart ,  Evgeny A. Verbitskiy ,  Albertus C. Den Brinker

发明人： Gerard H. Hotho ,  Dirk J. Breebaart ,  Evgeny A. Verbitskiy ,  Albertus C. Den Brinker

IPC分类号： H04R5/00

CPC分类号： G10L19/02 ,  G10L19/008 ,  G10L19/0204 ,  H04S3/008

摘要： There is described a method of encoding input signals (CHI to CH3; 400 to 450) in a multi-channel encoder (5; 15) to generate corresponding output data comprising down-mix output signals (610, 620) together with complementary parametric data (600). The method includes a first step of down-mixing input signals (CHI to CH3; 400 to 450) to generate the corresponding down-mix output signals (610, 620), and a second step of processing the input signals (CHI to CH3; 400 to 450) during down-mixing to generate said parametric data (600) complementary to the down-mix output signals (610, 620). Processing of the input signals (CHI to CH3; 400 to 450) involves including information in the down-mix signals (610, 620) which is useable during subsequent decoding of the down-mix output signals (610, 620) and the parametric data (600) to determine at least some parameter data and thereby enabling representations of the input signals (CHI to CH3; 400 to 450) to be subsequently regenerated. Coders for use in the encoder (5; 15) for performing essential signal processing operations therein are also elucidated.

摘要翻译： 描述了一种在多通道编码器（5; 15）中对输入信号（CHI至CH3; 400至450）进行编码的方法，以产生包括下混合输出信号（610,620）与互补参数数据的相应输出数据 （600）。 该方法包括将输入信号（CHI至CH3; 400至450）进行下混合以产生相应的下混合输出信号（610,620）的第一步骤，以及处理输入信号（CHI至CH3; 400至450），以产生与下混合输出信号（610,620）互补的所述参数数据（600）。 输入信号（CHI至CH3; 400至450）的处理涉及将下变频信号（610,620）中的信息包括在下混频输出信号（610,620）和参数数据的后续解码期间可用的信息 （600）以确定至少一些参数数据，从而使得能够随后再生所述输入信号（CHI至CH3; 400至450）的表示。 还阐明了用于编码器（5; 15）中用于执行其中的基本信号处理操作的编码器。