公开(公告)号：US20130262130A1

公开(公告)日：2013-10-03

申请号：US13880885

申请日：2011-10-18

Applicant: Stephane Ragot ,  Thi Minh Nguyet Hoang

Inventor： Stephane Ragot ,  Thi Minh Nguyet Hoang

IPC: G10L19/008

CPC classification number: G10L19/008

Abstract: A method and apparatus for the parametric encoding of a stereo digital-audio signal. The method includes encoding a mono signal produced by downmixing applied to the stereo signal and encoding spatialisation information of the stereo signal. Downmixing includes determining, for a predetermined set of frequency sub-bands, a phase difference between two stereo channels; obtaining an intermediate channel by rotating a first predetermined channel of the stereo signal through an angle obtained by reducing the phase difference; determining the phase of the mono signal from the phase of the signal that is the sum of the intermediate channel and the second stereo signal, and from a phase difference between, on the one hand, the signal that is the sum of the intermediate channel and the second channel and, on the other hand, the second channel of the stereo signal. Also provided are a decoding method, an encoder and a decoder.

Abstract translation: 一种用于立体声数字音频信号的参数编码的方法和装置。 该方法包括对应用于立体声信号的下混合产生的单声道信号进行编码，并对立体声信号的空间化信息进行编码。 对于预定的一组频率子频带，确定两个立体声声道之间的相位差; 通过使立体声信号的第一预定通道旋转通过减小相位差而获得的角度来获得中间通道; 从作为中间信道和第二立体声信号的和的信号的相位确定单声道信号的相位，并且从一方面确定作为中间信道和第二立体声信号的和的信号之间的相位差 第二通道，另一方面是立体声信号的第二通道。 还提供了解码方法，编码器和解码器。

公开(公告)号：US20120207311A1

公开(公告)日：2012-08-16

申请号：US13502316

申请日：2010-10-15

Applicant: Thi Minh Nguyet Hoang ,  Stephane Ragot ,  Balazs Kovesi

Inventor： Thi Minh Nguyet Hoang ,  Stephane Ragot ,  Balazs Kovesi

IPC: H04R5/00

CPC classification number: H04S3/008 ,  G10L19/008 ,  G10L19/167 ,  H04S2420/03

Abstract: A parametric coding method and apparatus are provided for coding a multichannel digital audio signal. The method includes a coding step for coding a signal from a channel reduction matrixing of the multichannel signal. The coding method also includes: obtaining, for each frame of predetermined length, spatial information parameters of the multichannel signal; dividing the spatial information parameters into a plurality of blocks of parameters; selecting a block of parameters as a function of the index of the current frame; and coding the block of parameters selected for the current frame.

Abstract translation: 提供了一种用于对多声道数字音频信号进行编码的参数编码方法和装置。 该方法包括：编码步骤，用于对来自多信道信号的信道减少矩阵化的信号进行编码。 编码方法还包括：对于每个预定长度的帧，获得多信道信号的空间信息参数; 将空间信息参数划分为多个参数块; 选择作为当前帧的索引的函数的参数块; 并编码为当前帧选择的参数块。

公开(公告)号：US20130289981A1

公开(公告)日：2013-10-31

申请号：US13997446

申请日：2011-12-20

Applicant: Stephane Ragot ,  Balazs Kovesi ,  Pierre Berthet

Inventor： Stephane Ragot ,  Balazs Kovesi ,  Pierre Berthet

IPC: G10L19/12

CPC classification number: G10L19/12 ,  G10L19/0212 ,  G10L19/022 ,  G10L19/04 ,  G10L19/18

Abstract: An encoder and a method for encoding a digital signal are provided. The method includes encoding a preceding frame of samples of the digital signal according to a predictive encoding process, and encoding a current frame of samples of the digital signal according to a transform encoding process. The method is implemented such that a first portion of the current frame is also encoded by predictive encoding that is limited relative to the predictive encoding of the preceding frame by reusing at least one parameter of the predictive encoding of the preceding frame and only encoding the parameters of said first portion of the current frame that are not reused. A decoder and a decoding method are also provided, which correspond to the described encoding method.

Abstract translation: 提供了一种用于编码数字信号的编码器和方法。 该方法包括根据预测编码处理对数字信号的前一帧采样进行编码，并根据变换编码处理对当前数字信号采样帧进行编码。 该方法被实现为使得当前帧的第一部分也通过预测编码进行编码，所述预测编码相对于前一帧的预测编码被限制，通过重用前一帧的预测编码的至少一个参数并且仅对参数进行编码 的当前帧的所述第一部分不被重复使用。 还提供了对应于所述编码方法的解码器和解码方法。

公开(公告)号：US20090076829A1

公开(公告)日：2009-03-19

申请号：US12279493

申请日：2007-02-07

Applicant: Stephane Ragot ,  Romain Trilling

Inventor： Stephane Ragot ,  Romain Trilling

IPC: G10L19/00

CPC classification number: G10L19/24 ,  G10L19/0208

Abstract: A hierarchical audio coder for use in a frequency band divided into adjacent first and second sub-bands, said coder comprising: a core coder (305) for coding an original signal in the first sub-band of said frequency band; a stage (306) for calculating a residual signal (e) from said original signal and the signal from said core coder; a device (307) for perceptually weighting said residual signal (e). The perceptual weighting device includes a perceptually weighted filter (307) with gain compensation adapted to realize spectral continuity between the output signal of said perceptually weighted filter with gain compensation and the signal in the second sub-band. Application to transmitting and storing digital signals, such as audio-frequency speech, music, etc. signals.

Abstract translation: 一种分级音频编码器，用于分成相邻的第一和第二子频带的频带，所述编码器包括：核心编码器，用于对所述频带的第一子带中的原始信号进行编码; 用于从所述原始信号和来自所述核心编码器的信号计算残差信号（e）的级（306） 用于感知地加权所述残余信号（e）的装置（307）。 感知加权装置包括具有增益补偿的感知加权滤波器（307），其适于实现具有增益补偿的所述感知加权滤波器的输出信号与第二子带中的信号之间的频谱连续性。 应用于数字信号的发送和存储，如音频语音，音乐等信号。

公开(公告)号：US20100228551A1

公开(公告)日：2010-09-09

申请号：US12224038

申请日：2007-02-13

Applicant: Stephane Ragot ,  Claude Lamblin

Inventor： Stephane Ragot ,  Claude Lamblin

IPC: G10L19/00

CPC classification number: H03M7/00 ,  H03M7/3082

Abstract: The invention relates to the encoding/decoding of digital signals, especially using transposition codes involving a calculation of combinatorial expressions. According to the invention, the combinatorial expressions are represented by prime factor power decompositions, and determined by a preliminary reading of pre-recorded representations of decompositions of selected whole numbers.

Abstract translation: 本发明涉及数字信号的编码/解码，特别是使用涉及计算组合表达式的转置码。 根据本发明，组合表达式由素数因子功率分解表示，并且通过对所选择的整数的分解的预先记录的表示的初步读取来确定。

公开(公告)号：US20090030678A1

公开(公告)日：2009-01-29

申请号：US12280644

申请日：2007-02-13

Applicant: Balazs Kovesi ,  Stephane Ragot

Inventor： Balazs Kovesi ,  Stephane Ragot

IPC: G10L19/00

CPC classification number: G10L19/032 ,  G10L19/0212

Abstract: A module (402) for binary coding of a signal envelope, comprising coding module (502) for coding a variable length first mode. The coding module for coding the first mode incorporates an envelope saturation detector and said coding module (402) further includes a second coding module (503) for coding a second mode in parallel with the coding module (502) for coding the first mode and a mode selector (504) adapted to select one of the two coding modes as a function of a code length criterion and of the result from the envelope saturation detector.

Abstract translation: 一种用于信号包络的二进制编码的模块（402），包括用于编码可变长度第一模式的编码模块（502）。 用于编码第一模式的编码模块包括包络饱和检测器，并且所述编码模块（402）还包括用于与用于编码第一模式的编码模块（502）并行编码第二模式的第二编码模块（503） 模式选择器（504），其适于根据码长度标准和来自包络饱和检测器的结果来选择两种编码模式之一。

公开(公告)号：US09167367B2

公开(公告)日：2015-10-20

申请号：US13502316

申请日：2010-10-15

Applicant: Thi Minh Nguyet Hoang ,  Stephane Ragot ,  Balazs Kovesi

Inventor： Thi Minh Nguyet Hoang ,  Stephane Ragot ,  Balazs Kovesi

IPC: H04R5/00 ,  H04S3/00 ,  G10L19/008 ,  G10L19/16

CPC classification number: H04S3/008 ,  G10L19/008 ,  G10L19/167 ,  H04S2420/03

Abstract: A parametric coding method and apparatus are provided for coding a multichannel digital audio signal. The method includes a coding step for coding a signal from a channel reduction matrixing of the multichannel signal. The coding method also includes: obtaining, for each frame of predetermined length, spatial information parameters of the multichannel signal; dividing the spatial information parameters into a plurality of blocks of parameters; selecting a block of parameters as a function of the index of the current frame; and coding the block of parameters selected for the current frame.

Abstract translation: 提供了一种用于对多声道数字音频信号进行编码的参数编码方法和装置。 该方法包括：编码步骤，用于对来自多信道信号的信道减少矩阵化的信号进行编码。 编码方法还包括：对于每个预定长度的帧，获得多信道信号的空间信息参数; 将空间信息参数划分为多个参数块; 选择作为当前帧的索引的函数的参数块; 并编码为当前帧选择的参数块。

公开(公告)号：US20090207934A1

公开(公告)日：2009-08-20

申请号：US12366098

申请日：2009-02-05

Applicant: Stephane Ragot ,  Claude Lamblin

Inventor： Stephane Ragot ,  Claude Lamblin

IPC: H04L27/00

CPC classification number: H03M7/00 ,  H03M7/3082

Abstract: The invention relates to the encoding/decoding of digital signals, especially using permutation codes involving a calculation of combinatorial expressions. According to the invention, the combinatorial expressions are represented by prime factor power decompositions, and determined by a preliminary reading of pre-recorded representations of decompositions of selected integers.

公开(公告)号：US20090207933A1

公开(公告)日：2009-08-20

申请号：US12366093

申请日：2009-02-05

Applicant: Stephane Ragot ,  Claude Lamblin

Inventor： Stephane Ragot ,  Claude Lamblin

IPC: H04L27/00

CPC classification number: H03M7/00 ,  H03M7/3082

Abstract: The invention relates to the encoding/decoding of digital signals, especially using permutation codes involving a calculation of combinatorial expressions. According to the invention, the combinatorial expressions are represented by prime factor power decompositions, and determined by a preliminary reading of pre-recorded representations of decompositions of selected integers.

Abstract translation: 本发明涉及数字信号的编码/解码，特别是使用涉及计算组合表达式的排列代码。 根据本发明，组合表达式由素数因子功率分解表示，并且通过对所选择的整数的分解的预记录表示的初步读取来确定。

公开(公告)号：US20050285764A1

公开(公告)日：2005-12-29

申请号：US10515550

申请日：2003-05-30

Applicant: Bruno Bessette ,  Stephane Ragot ,  Jean-Pierre Adoul

Inventor： Bruno Bessette ,  Stephane Ragot ,  Jean-Pierre Adoul

IPC: H03M1/00 ,  G10L19/038 ,  H03M3/00

CPC classification number: G10L19/10 ,  G10L19/06 ,  G10L2019/0008 ,  H03M7/3082

Abstract: The present invention relates to a method and system for multi-rate lattice vector quantization of a source vector x representing a frame from a source signal to be used, for example, in digital transmission and storage systems. The multi-rate lattice quantization encoding method comprises the steps of associating to x a lattice point y in a unbounded lattice Λ; verifying if y is included in a base codebook C derived from the lattice Λ; if it is the case then indexing y in C so as to yield quantization indices if not then extending the base codebook using, for example a Voronoi based extension method, yielding an extended codebook; associating to y a codevector c from the extended codebook, and indexing y in the extended codebook C. The extension technique allows to obtain higher bit rate codebooks from the base codebooks compared to quantization method and system from the prior art.

Abstract translation: 本发明涉及一种用于例如在数字传输和存储系统中使用的源信号的表示帧的源向量x的多速率格子矢量量化的方法和系统。 多速率格子量化编码方法包括以下步骤：将x与无界格子λ中的格点y相关联; 验证y是否包括在从格子λ衍生的基本码本C中; 如果是这样的话，则在C中索引y，以便如果不是使用例如基于Voronoi的扩展方法扩展基本码本来产生量化索引，则产生扩展码本; 将来自扩展码本的码向量c与扩展码本C中的码向量c相关联。扩展技术允许从现有技术的量化方法和系统中获得来自基本码本的较高比特率码本。