公开(公告)号：US20160234621A1

公开(公告)日：2016-08-11

申请号：US14764754

申请日：2013-01-04

Applicant: Christof Faller ,  David Virette ,  Yue Lang

Inventor： Christof Faller ,  David Virette ,  Yue Lang

IPC: H04S7/00 ,  H04R3/00 ,  H04R5/027

CPC classification number: H04S7/301 ,  H04R1/406 ,  H04R3/005 ,  H04R5/027 ,  H04R5/04 ,  H04S1/002 ,  H04S2400/09 ,  H04S2400/15

Abstract: A method for determining an output stereo signal comprising determining a first differential signal and determining a second differential signal; determining a first power spectrum based on the first differential signal and determining a second power spectrum based on the second differential signal; determining a first weighting function and a second weighting function as a function of the first power spectrum and the second power spectrum; and filtering a first signal, which represents a first combination of the first input audio channel signal and the second input audio channel signal, and filtering a second signal, which represents a second combination of the first input audio channel signal and the second input audio channel signal.

Abstract translation: 一种用于确定输出立体声信号的方法，包括确定第一差分信号并确定第二差分信号; 基于所述第一差分信号确定第一功率谱，并基于所述第二差分信号确定第二功率谱; 确定作为所述第一功率谱和所述第二功率谱的函数的第一加权函数和第二加权函数; 以及对表示所述第一输入音频声道信号和所述第二输入音频声道信号的第一组合的第一信号进行滤波，以及对表示所述第一输入音频声道信号和所述第二输入音频声道信号的第二组合的第二信号进行滤波 信号。

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：US08615390B2

公开(公告)日：2013-12-24

申请号：US12448734

申请日：2007-12-18

Applicant: Balazs Kovesi ,  David Virette ,  Pierrick Philippe

Inventor： Balazs Kovesi ,  David Virette ,  Pierrick Philippe

IPC: G06F15/00 ,  G10L19/00 ,  G10L25/00 ,  G10L21/00 ,  G10L25/90 ,  G10L21/02

CPC classification number: G10L19/022

Abstract: The invention relates to transform coding/decoding of a digital audio signal represented by a succession of frames, using windows of different lengths. For the coding within the meaning of the invention, it is sought to detect (51) a particular event, such as an attack, in a current frame (Ti); and, at least if said particular event is detected at the start of the current frame (53), a short window (54) is directly applied in order to code (56) the current frame (Ti) without applying a transition window. Thus, the coding has a reduced delay in relation to the prior art. In addition, an ad hoc processing is applied during decoding in order to compensate for the direct passage from a long window to a short window during coding.

Abstract translation: 本发明涉及使用不同长度的窗口的由一系列帧代表的数字音频信号的变换编码/解码。 对于本发明意义上的编码，寻求在当前帧（Ti）中检测（51）特定事件，例如攻击; 并且至少如果在当前帧（53）的开始处检测到所述特定事件，则直接应用短窗口（54），以便在不应用转换窗口的情况下对当前帧（Ti）进行编码（56）。 因此，与现有技术相比，编码具有减小的延迟。 此外，在解码期间应用ad hoc处理，以补偿在编码期间从长窗口到短窗口的直接传递。

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：US20120185256A1

公开(公告)日：2012-07-19

申请号：US13382794

申请日：2010-06-25

Applicant: David Virette ,  Pierre Berthet

Inventor： David Virette ,  Pierre Berthet

IPC: G10L19/00

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

Abstract: A method of binary allocation in an enhancement coding/decoding for improving a hierarchical coding/decoding of digital audio signals, including a core coding/decoding in a first frequency band and a band extension coding/decoding in a second frequency band. For a predetermined number of bits to be allocated for the enhancement coding/decoding, a first number of bits is allocated to a coding/decoding for correcting the core coding/decoding in the first frequency band and according to a first mode of coding/decoding and a second number of bits is allocated to an enhancement coding/decoding for improving the extension coding/decoding in the second frequency band and according to a second mode of coding/decoding. Also provided are an allocation module implementing the method and a coder and decoder including this module.

Abstract translation: 一种用于改进数字音频信号的分层编码/解码的增强编码/解码中的二进制分配方法，包括第一频带中的核心编码/解码和第二频带中的频带扩展编码/解码。 对于要分配用于增强编码/解码的预定数量的比特，将第一数量的比特分配给用于校正第一频带中的核心编码/解码的编码/解码，并且根据编码/解码的第一模式 并且第二数量的比特被分配给用于改进第二频带中的扩展编码/解码的增强编码/解码，并且根据第二编码/解码模式。 还提供了实现该方法的分配模块和包括该模块的编码器和解码器。

公开(公告)号：US20110178809A1

公开(公告)日：2011-07-21

申请号：US13120473

申请日：2009-10-05

Applicant: Pierrick Philippe ,  David Virette

Inventor： Pierrick Philippe ,  David Virette

IPC: G10L19/00

CPC classification number: G10L19/022 ,  G10L19/0212 ,  G10L19/04 ,  G10L19/107 ,  G10L19/20

Abstract: A method for encoding and decoding a digital audio signal is provided, said method comprising the steps of: encoding a first sequence of samples of the digital signal according to a transform encoding; encoding a second sequence of samples of the digital signal according to a predictive encoding; wherein the second sequence starts before the end of the first sequence, a subsequence common to the first and second sequences being thus encoded both by predictive encoding and by transform encoding.

Abstract translation: 提供了一种对数字音频信号进行编码和解码的方法，所述方法包括以下步骤：根据变换编码对数字信号的第一采样序列进行编码; 根据预测编码对数字信号的第二采样序列进行编码; 其中所述第二序列在所述第一序列结束之前开始，因此通过预测编码和通过变换编码对所述第一和第二序列共同的子序列进行编码。

公开(公告)号：US20110145310A1

公开(公告)日：2011-06-16

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：US20110007827A1

公开(公告)日：2011-01-13

申请号：US12920352

申请日：2009-03-20

Applicant: David Virette ,  Pierrick Philippe ,  Balazs Kovesi

Inventor： David Virette ,  Pierrick Philippe ,  Balazs Kovesi

IPC: H04L27/00

CPC classification number: G10L19/005 ,  G10L19/0212 ,  G10L19/24

Abstract: A method is provided for concealing a transmission error in a digital signal chopped into a plurality of successive frames associated with different time intervals in which, on reception, the signal may comprise erased frames and valid frames, the valid frames comprising information relating to the concealment of frame loss. The method is implemented during a hierarchical decoding using a core decoding and a transform-based decoding using windows introducing a time delay of less than a frame with respect to the core decoding. The method includes concealing a first set of missing samples for the erased frame, implemented in a first time interval; a step of concealing a second set of missing samples utilizing information of said valid frame and implemented in a second time interval; and a step of transition between the first and the second set of missing samples to obtain at least part of the missing frame.

Abstract translation: 提供了一种隐藏在剁碎成与不同时间间隔相关联的多个连续帧中的数字信号中的传输错误的方法，其中在接收时，信号可以包括被擦除的帧和有效帧，该有效帧包括与隐藏有关的信息 的帧丢失。 该方法在使用核心解码和使用引入相对于核心解码的小于帧的时间延迟的窗口的基于变换的解码的分层解码期间实现。 该方法包括在第一时间间隔内隐藏针对被擦除的帧的第一组缺失样本集; 利用所述有效帧的信息隐藏第二组丢失样本并在第二时间间隔内实现的步骤; 以及在第一组和第二组缺失样本之间转换以获得缺失帧的至少一部分的步骤。

公开(公告)号：US07680670B2

公开(公告)日：2010-03-16

申请号：US10587907

申请日：2004-01-30

Applicant: Claude Lamblin ,  David Virette ,  Balazs Kovesi ,  Dominique Massaloux

Inventor： Claude Lamblin ,  David Virette ,  Balazs Kovesi ,  Dominique Massaloux

IPC: G10L19/00 ,  G06K9/00 ,  H04N7/26

CPC classification number: H03M7/3082 ,  G10L19/097 ,  H03M7/3088

Abstract: The invention relates to compression coding and/or decoding of digital signals, in particular by vector variable-rate quantisation defining a variable resolution. For this purpose an impulsion dictionary comprises: for a given dimension, increasing resolution dictionaries imbricated into each other and, for a given dimension, a union of: a totality (D′i ) of code-vectors produced, by inserting elements taken in a final set (A) into smaller dimension code-vectors according to a final set of predetermined insertion rules (F1) and a second totality of code-vectors (Y′) which are not obtainable by insertion into the smaller dimension code vectors according to said set of the insertion rules.

Abstract translation: 本发明涉及数字信号的压缩编码和/或解码，特别是通过定义可变分辨率的矢量可变速率量化。 为此目的，冲动字典包括：对于给定的维度，增加的分辨率词典彼此融合，并且对于给定的维度，通过插入元素的整数（D'i N）来产生代码矢量 根据预定插入规则（F1）的最终集合和不能通过插入到较小维度码矢量中获得的第二总体码矢量（Y'），将最终集合（A）取入最小集合（A） 根据所说的一套插入规则。

公开(公告)号：US20090097663A1

公开(公告)日：2009-04-16

申请号：US12225097

申请日：2007-03-01

Applicant: Gregory Pallone ,  Marc Emerit ,  David Virette

Inventor： Gregory Pallone ,  Marc Emerit ,  David Virette

IPC: H04S1/00

CPC classification number: G10H7/00 ,  G10H2210/301 ,  H04R2499/11 ,  H04S3/002

Abstract: The invention concerns a process for joint synthesis and spatialization of multiple sound sources in associated spatial positions, including: a) a step of assigning to each source at least one parameter (pi) representing an amplitude; b) a step of spatialization consisting in implementing an encoding into a plurality of channels, wherein each amplitude (pi) is duplicated to be multiplied to a specialization gain (gim), each spatialization gain being determined for one encoding channel (pgm) and for a source to be spatialized (Si); c) a step of grouping (R) the parameters multiplied by the gains (Pim), in respective channels (pg1, . . . , pgM), by applying a sum of said multiplied parameters (pim) on all the sources (Si) for each channel (pgm), and d) a step of parametric synthesis (SYNTH(I), . . . , SYNTH(M)) applied to each of the channels (pgm).

Abstract translation: 本发明涉及一种用于在相关联的空间位置中联合合成和多个声源空间化的过程，包括：a）向每个源分配表示振幅的至少一个参数（pi）的步骤; b）空间化步骤，其包括将编码实现到多个通道中，其中每个振幅（pi）被复制以与特殊增益（gim）相乘，每个空间增益被确定用于一个编码通道（pgm），并且对于 空间化源（Si）; c）通过在所有源（Si）上施加所述相乘参数（pim）的和来将（R）参数乘以增益（Pim）分组在各个通道（pg1，...，pgM）中的步骤， 对于每个通道（pgm），以及d）应用于每个通道（pgm）的参数合成（SYNTH（I），...，SYNTH（M））的步骤。