公开(公告)号：US20110249821A1

公开(公告)日：2011-10-13

申请号：US13139577

申请日：2009-12-11

Applicant: Florent Jaillet ,  David Virette

Inventor： Florent Jaillet ,  David Virette

IPC: H04R5/00

CPC classification number: G10L19/008

Abstract: A method for coding a multi-channel audio signal representing a sound scene comprising a plurality of sound sources is provided. This method comprises decomposing the multi-channel signal into frequency bands and, per frequency band, obtaining directivity information per sound source of the sound scene, the information being representative of the spatial distribution of the sound source in the sound scene, of selecting a set of sound sources of the sound scene constituting principal sources, of matrixing the selected principal sources to obtain a sum signal with a reduced number of channels and, of coding the directivity information and of forming a binary stream comprising the coded directivity information, the binary stream being transmittable in parallel with the sum signal. A decoding method is also provided that is able to decode the sum signal and the directivity information to obtain a multi-channel signal, to an adapted coder and an adapted decoder.

Abstract translation: 提供了一种用于编码表示包括多个声源的声音场景的多声道音频信号的方法。 该方法包括将多声道信号分解为频带，并且每频带获得每个声场的每个声源的指向性信息，所述信息代表声场中的声源的空间分布，选择一组 构成主要源的声音场景的声源，对所选择的主要源进行矩阵化以获得具有减少的通道数的和信号，以及编码方向性信息和形成包括编码的方向性信息的二进制流，二进制流 可与和信号并行传输。 还提供了一种能够将求和信号和方向性信息解码以获得多信道信号的解码方法，其适用于编码器和适配解码器。

公开(公告)号：US08817991B2

公开(公告)日：2014-08-26

申请号：US13139611

申请日：2009-12-11

Applicant: Florent Jaillet ,  David Virette

Inventor： Florent Jaillet ,  David Virette

IPC: H04R5/00 ,  G10L19/008 ,  H04S3/00 ,  H04S3/02

CPC classification number: G10L19/008 ,  H04S3/008 ,  H04S3/02 ,  H04S2400/11 ,  H04S2420/03 ,  H04S2420/07

Abstract: A method is provided for coding a multi-channel audio signal representing a sound scene comprising a plurality of sound sources. The method comprises decomposing the multi-channel signal into frequency bands and the following performed per frequency band: obtaining data representative of the direction of the sound sources of the sound scene, selecting a set of sound sources constituting principal sources, adapting the data representative of the direction of the selected principal sources, as a function of restitution characteristics of the multi-channel signal, determining a matrix for mixing the principal sources as a function of the adapted data, matrixing the principal sources by the matrix determined so as to obtain a sum signal with a reduced number of channels and coding the data representative of the direction of the sound sources and forming a binary stream comprising the coded data, the binary stream being transmittable in parallel with the sum signal.

Abstract translation: 提供一种用于编码表示包括多个声源的声音场景的多声道音频信号的方法。 该方法包括将多声道信号分解为频带，并且每个频带执行以下操作：获得表示声场的声源方向的数据，选择构成主要源的一组声源，使代表 所选择的主要源的方向作为多通道信号的恢复特性的函数，确定用于根据适配数据混合主要源的矩阵，通过确定的矩阵将主源矩阵化以获得 和信号，并且对代表声源方向的数据进行编码，并形成包括编码数据的二进制流，该二进制流可与和信号并行发送。

公开(公告)号：US20110249822A1

公开(公告)日：2011-10-13

申请号：US13139611

申请日：2009-12-11

Applicant: Florent Jaillet ,  David Virette

Inventor： Florent Jaillet ,  David Virette

IPC: H04R5/00

CPC classification number: G10L19/008 ,  H04S3/008 ,  H04S3/02 ,  H04S2400/11 ,  H04S2420/03 ,  H04S2420/07

Abstract: A method is provided for coding a multi-channel audio signal representing a sound scene comprising a plurality of sound sources. The method comprises decomposing the multi-channel signal into frequency bands and the following performed per frequency band: obtaining data representative of the direction of the sound sources of the sound scene, selecting a set of sound sources constituting principal sources, adapting the data representative of the direction of the selected principal sources, as a function of restitution characteristics of the multi-channel signal, determining a matrix for mixing the principal sources as a function of the adapted data, matrixing the principal sources by the matrix determined so as to obtain a sum signal with a reduced number of channels and coding the data representative of the direction of the sound sources and forming a binary stream comprising the coded data, the binary stream being transmittable in parallel with the sum signal.

Abstract translation: 提供一种用于编码表示包括多个声源的声音场景的多声道音频信号的方法。 该方法包括将多声道信号分解为频带，并且每个频带执行以下操作：获得表示声场的声源方向的数据，选择构成主要源的一组声源，使代表 所选择的主要源的方向作为多通道信号的恢复特性的函数，确定用于根据适配数据混合主要源的矩阵，通过确定的矩阵将主源矩阵化以获得 和信号，并且对代表声源方向的数据进行编码，并形成包括编码数据的二进制流，该二进制流可与和信号并行发送。

公开(公告)号：US20110106543A1

公开(公告)日：2011-05-05

申请号：US12996406

申请日：2009-06-16

Applicant: Florent Jaillet ,  David Virette

Inventor： Florent Jaillet ,  David Virette

IPC: G10L19/00 ,  H04S3/02

CPC classification number: G10L19/008 ,  H04S3/008 ,  H04S3/02 ,  H04S2420/03

Abstract: A method and associated device are provided for spatial synthesis of a sum signal to obtain at least two output signals, the sum signal as well as the spatialization parameters being output from a parametric coding by matrixing of an original multi-channel signal. The method comprises: decorrelation of the sum signal to obtain a decorrelated signal; applying a synthesis matrix, whose coefficients depend on the spatialization parameters, to the decorrelated signal and to the sum signal to obtain said output signals, wherein for at least one range of value of at least one spatialization parameter, the coefficients of the synthesis matrix are determined according to a criterion of minimizing a quantitative function, relating to the quantity of decorrelated signal in each of the output signals obtained by applying the synthesis matrix.

Abstract translation: 提供了一种用于空间合成和信号以获得至少两个输出信号的方法和相关设备，该和信号以及通过原始多信道信号的矩阵化从参数编码输出的空间参数。 该方法包括：求和信号的去相关以获得解相关信号; 将其系数取决于空间化参数的合成矩阵应用于解相关信号和和信号以获得所述输出信号，其中对于至少一个空间参数的值的至少一个范围，合成矩阵的系数为 根据使定量函数最小化的标准，与通过应用合成矩阵获得的每个输出信号中去相关信号的量相关。

公开(公告)号：US08964994B2

公开(公告)日：2015-02-24

申请号：US13139577

申请日：2009-12-11

Applicant: Florent Jaillet ,  David Virette

Inventor： Florent Jaillet ,  David Virette

IPC: H04R5/00 ,  G10L19/008

CPC classification number: G10L19/008

Abstract: A method for coding a multi-channel audio signal representing a sound scene comprising a plurality of sound sources is provided. This method comprises decomposing the multi-channel signal into frequency bands and, per frequency band, obtaining directivity information per sound source of the sound scene, the information being representative of the spatial distribution of the sound source in the sound scene, of selecting a set of sound sources of the sound scene constituting principal sources, of matrixing the selected principal sources to obtain a sum signal with a reduced number of channels and, of coding the directivity information and of forming a binary stream comprising the coded directivity information, the binary stream being transmittable in parallel with the sum signal. A decoding method is also provided that is able to decode the sum signal and the directivity information to obtain a multi-channel signal, to an adapted coder and an adapted decoder.

Abstract translation: 提供了一种用于编码表示包括多个声源的声音场景的多声道音频信号的方法。 该方法包括将多声道信号分解为频带，并且每频带获得每个声场的每个声源的指向性信息，所述信息代表声场中的声源的空间分布，选择一组 构成主要源的声音场景的声源，对所选择的主要源进行矩阵化以获得具有减少的通道数的和信号，以及编码方向性信息和形成包括编码的方向性信息的二进制流，二进制流 可与和信号并行传输。 还提供了一种能够将求和信号和方向性信息解码以获得多信道信号的解码方法，其适用于编码器和适配解码器。

公开(公告)号：US08583424B2

公开(公告)日：2013-11-12

申请号：US12996406

申请日：2009-06-16

Applicant: Florent Jaillet ,  David Virette

Inventor： Florent Jaillet ,  David Virette

IPC: G01L21/00 ,  G01L19/02 ,  G01L19/00

CPC classification number: G10L19/008 ,  H04S3/008 ,  H04S3/02 ,  H04S2420/03

Abstract: A method and associated device are provided for spatial synthesis of a sum signal to obtain at least two output signals, the sum signal as well as the spatialization parameters being output from a parametric coding by matrixing of an original multi-channel signal. The method comprises: decorrelation of the sum signal to obtain a decorrelated signal; applying a synthesis matrix, whose coefficients depend on the spatialization parameters, to the decorrelated signal and to the sum signal to obtain said output signals, wherein for at least one range of value of at least one spatialization parameter, the coefficients of the synthesis matrix are determined according to a criterion of minimizing a quantitative function, relating to the quantity of decorrelated signal in each of the output signals obtained by applying the synthesis matrix.

Abstract translation: 提供了一种用于空间合成和信号以获得至少两个输出信号的方法和相关设备，该和信号以及通过原始多信道信号的矩阵化从参数编码输出的空间参数。 该方法包括：求和信号的去相关以获得解相关信号; 将其系数取决于空间化参数的合成矩阵应用于解相关信号和和信号以获得所述输出信号，其中对于至少一个空间参数的值的至少一个范围，合成矩阵的系数为 根据使定量函数最小化的标准，与通过应用合成矩阵获得的每个输出信号中去相关信号的量相关。

公开(公告)号：US09847085B2

公开(公告)日：2017-12-19

申请号：US13995718

申请日：2011-12-16

Applicant: Pierrick Philippe ,  David Virette

Inventor： Pierrick Philippe ,  David Virette

IPC: G10L19/00 ,  G10L19/26 ,  G10L19/02 ,  G10L19/022

CPC classification number: G10L19/00 ,  G10L19/02 ,  G10L19/0204 ,  G10L19/0212 ,  G10L19/022 ,  G10L19/26

Abstract: A method for processing a signal in the form of consecutive sample blocks, the method comprising filtering in a transformed domain of sub-bands, and particularly equalization processing, applied to a current block in the transformed domain, and filtering-adjustment processing that is applied in the transformed domain to at least one block adjacent to the current block.

公开(公告)号：US08880413B2

公开(公告)日：2014-11-04

申请号：US12309074

申请日：2007-06-19

Applicant: David Virette ,  Alexandre Guerin

Inventor： David Virette ,  Alexandre Guerin

IPC: G10L19/00 ,  H04R5/00 ,  H04S3/00 ,  H04S3/02 ,  G10L19/008 ,  H04S1/00

CPC classification number: H04S3/004 ,  G10L19/008 ,  H04S1/002 ,  H04S3/002 ,  H04S3/02 ,  H04S2400/01 ,  H04S2420/01 ,  H04S2420/03 ,  H04S2420/05

Abstract: The invention is aimed at improving the quality of the filtering by transfer functions of HRTF type of signals (L, R) compressed in a transformed domain, for binaural playing on two channels (L-BIN, R-BIN), using a combination of HRTF filters (hL,L, hL,R) including a decorrelated version (HRTF-C*, HRTF-E*) of a few of these filters. For this purpose, a decorrelation cue is given with spatialization parameters (SPAT) accompanying the compressed signals (L, R). The Decorrelation comprises applying a different phase shift to each subband of the input signal combined with addition of an overall delay. The invention makes it possible to improve the broadening in the binaural rendition of audio scenes initially in a multi-channel format.

Abstract translation: 本发明旨在通过在变换域中压缩的信号（L，R）的HRTF类型的传递函数来提高滤波质量，用于双通道（L-BIN，R-BIN）上的双耳播放，使用 HRTF滤波器（hL，L，hL，R）包括几个滤波器的去相关版本（HRTF-C *，HRTF-E *）。 为此，给出了伴随压缩信号（L，R）的空间化参数（SPAT）的去相关提示。 解相关包括对输入信号的每个子带应用不同的相移以及总延迟的加法。 本发明可以改善最初以多声道格式的音频场景的双耳再现的扩展。

公开(公告)号：US08788555B2

公开(公告)日：2014-07-22

申请号：US13056154

申请日：2009-07-03

Applicant: Pierrick Philippe ,  David Virette

Inventor： Pierrick Philippe ,  David Virette

IPC: G06F17/17

CPC classification number: G10L19/0212 ,  H03H17/0264

Abstract: A method for updating the processing capacity of an encoder or decoder to use a modulated transform having a size greater than a predetermined initial size is provided, particularly, where the encoders or decoders are for storing an initial prototype filter defined by an ordered set of initial size coefficients. A step is provided for constructing a prototype filter of a size greater than the initial size to implement the modulated transform of the greater size by inserting at least one coefficient between two consecutive coefficients of the initial prototype filter.

Abstract translation: 提供了一种用于更新编码器或解码器以使用尺寸大于预定初始尺寸的调制变换的处理能力的方法，特别地，其中编码器或解码器用于存储由初始化的有序集合定义的初始原型滤波器 尺寸系数。 提供了一个步骤，用于构建大于初始尺寸的原型滤波器，以通过在初始原型滤波器的两个连续系数之间插入至少一个系数来实现较大尺寸的调制变换。

公开(公告)号：US20120185255A1

公开(公告)日：2012-07-19

申请号：US13382786

申请日：2010-06-25

Applicant: David Virette ,  Stéphane Ragot ,  Balazs Kovesi ,  Pierre Berthet

Inventor： David Virette ,  Stéphane Ragot ,  Balazs Kovesi ,  Pierre Berthet

IPC: G10L21/00

CPC classification number: G10L19/002 ,  G10L19/0212 ,  G10L19/038 ,  G10L19/24

Abstract: A method of hierarchical coding of a digital audio frequency input signal into several frequency sub-bands, including a core coding of the input signal according to a first throughput and at least one enhancement coding of higher throughput, of a residual signal. The core coding uses a binary allocation according to an energy criterion. The method includes for the enhancement coding: calculating a frequency-based masking threshold for at least part of the frequency bands processed by the enhancement coding; determining a perceptual importance per frequency sub-band as a function of the masking threshold and as a function of the number of bits allocated for the core coding; binary allocation of bits in the frequency sub-bands processed by the enhancement coding, as a function of the perceptual importance determined; and coding the residual signal according to the bit allocation. Also provided are a decoding method, a coder and a decoder.

Abstract translation: 一种将数字音频输入信号分层编码成若干频率子带的方法，包括根据第一吞吐量的输入信号的核心编码和较高吞吐量的残余信号的至少一个增强编码。 核心编码根据能量标准使用二进制分配。 该方法包括用于增强编码：计算由增强编码处理的至少部分频带的基于频率的掩蔽阈值; 确定每个频率子带的感知重要性作为掩蔽阈值的函数，并且作为分配给核心编码的比特数的函数; 由增强编码处理的频率子带中的位的二进制分配作为确定的感知重要性的函数; 并根据比特分配对残差信号进行编码。 还提供了解码方法，编码器和解码器。