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：US09620139B2

公开(公告)日：2017-04-11

申请号：US13807657

申请日：2011-06-17

Applicant: Pierrick Philippe ,  David Virette ,  Claude Lamblin

Inventor： Pierrick Philippe ,  David Virette ,  Claude Lamblin

IPC: G10L21/00 ,  G10L19/06 ,  G10L13/00 ,  G06F11/00 ,  H03M7/30 ,  G10L19/18

CPC classification number: G10L21/00 ,  G10L19/06 ,  G10L19/18

Abstract: A method of coding/decoding of a digital audio signal comprising a succession of consecutive blocks of data, on the basis of a predictive filter. A modified predictive filter is used for the coding of at least one current block, the modified filter being constructed by the combination of: a rear filter calculated for a past block, preceding the current block, and enrichment parameters for the rear filter, which are determined as a function of the signal in the current block and comprising the coefficients of a modifying filter.

公开(公告)号：US08605909B2

公开(公告)日：2013-12-10

申请号：US12225677

申请日：2007-03-08

Applicant: Marc Emerit ,  Pierrick Philippe ,  David Virette

Inventor： Marc Emerit ,  Pierrick Philippe ,  David Virette

IPC: H04R5/00

CPC classification number: H04S3/008 ,  H04S1/007

Abstract: The invention concerns a method and a system for sound spatialization of a first set of not less than one of the audio channels encoded on of a number of frequency subbands (SBk) and decoded in a transformed domain (Fl, C, Fr, Sr, SI, Ife) into a second set of not less than two (Bl, Br) sound channels in the time domain, from modelling filters converted into a gain and a delay applicable in the transformed domain involving: filtering (A) through equalization, subband delay of the signal by applying at least one gain and one delay to generate from each of said encoded channels an equalized and delayed component; adding (B) a subset of equalized and delayed signals to create a number of filtered signals corresponding to not less than two; synthesizing (C) each of said filtered signals to obtain the second set of not less than two reproduction sound channels (Bl, Br) in the time domain.

Abstract translation: 本发明涉及一种用于声音空间化的方法和系统，所述方法和系统用于在多个频率子带（SBk）上编码的不少于一个音频信道的第一组声音空间化，并在变换域（F1，C，Fr，Sr， SI，Ife）转换成时域中不少于两个（B1，Br）声道的第二组，从被转换成增益的建模滤波器和适用于变换域的延迟，涉及：滤波（A）通过均衡，子带 通过施加至少一个增益和一个延迟来从每个所述编码信道生成均衡和延迟的分量来延迟信号; 添加（B）均衡和延迟信号的子集以产生对应于不小于2的多个滤波信号; 合成（C）每个所述滤波信号以获得时域中不少于两个再现声道（B1，Br）的第二组。

公开(公告)号：US20130103408A1

公开(公告)日：2013-04-25

申请号：US13807657

申请日：2011-06-17

Applicant: Pierrick Philippe ,  David Virette ,  Claude Lamblin

Inventor： Pierrick Philippe ,  David Virette ,  Claude Lamblin

IPC: G10L21/00

CPC classification number: G10L21/00 ,  G10L19/06 ,  G10L19/18

Abstract: A method of coding/decoding of a digital audio signal comprising a succession of consecutive blocks of data, on the basis of a predictive filter. A modified predictive filter is used for the coding of at least one current block, the modified filter being constructed by the combination of: a rear filter calculated for a past block, preceding the current block, and enrichment parameters for the rear filter, which are determined as a function of the signal in the current block and comprising the coefficients of a modifying filter.

Abstract translation: 一种基于预测滤波器对包括一系列连续的数据块的数字音频信号进行编码/解码的方法。 经修改的预测滤波器用于至少一个当前块的编码，修改的滤波器由以下组合构成：对于当前块之前的过去块计算的后滤波器和后滤波器的浓缩参数 作为当前块中的信号的函数确定并且包括修正滤波器的系数。

公开(公告)号：US08391373B2

公开(公告)日：2013-03-05

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: H04B14/04

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: 提供了一种隐藏在切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：US20100283639A1

公开(公告)日：2010-11-11

申请号：US12809666

申请日：2008-12-11

Applicant: Pierrick Philippe ,  David Virette

Inventor： Pierrick Philippe ,  David Virette

IPC: H03M5/02

CPC classification number: H04N19/60 ,  G10L19/0212 ,  G10L19/022

Abstract: The present invention provides coding/decoding a digital signal, in particular using a transform with overlap employing weighting windows. In the invention, two consecutive and equal-size blocks of samples of the signal may be weighted by respective different successive windows. These two windows may be chosen independently of each other according to a criterion specific to the characteristics of the signal (entropy, data rate/distortion, etc.) that are determined for each of the two blocks.

Abstract translation: 本发明提供对数字信号的编码/解码，特别是使用加权窗口的重叠变换。 在本发明中，可以通过相应的不同连续窗口对信号的两个连续和相等大小的样本块进行加权。 这两个窗口可以根据针对两个块中的每一个确定的信号特性（熵，数据速率/失真等）的标准彼此独立地选择。

公开(公告)号：US20090232317A1

公开(公告)日：2009-09-17

申请号：US12225677

申请日：2007-03-08

Applicant: Marc Emerit ,  Pierrick Philippe ,  David Virette

Inventor： Marc Emerit ,  Pierrick Philippe ,  David Virette

IPC: H04R5/00

CPC classification number: H04S3/008 ,  H04S1/007

Abstract: The invention concerns a method and a system for sound spatialization of a first set of not less than one of the audio channels encoded on of a number of frequency subbands (SBk) and decoded in a transformed domain (Fl, C, Fr, Sr, SI, Ife) into a second set of not less than two (Bl, Br) sound channels in the time domain, from modelling filters converted into a gain and a delay applicable in the transformed domain involving: filtering (A) through equalization, subband delay of the signal by applying at least one gain and one delay to generate from each of said encoded channels an equalized and delayed component; adding (B) a subset of equalized and delayed signals to create a number of filtered signals corresponding to not less than two; synthesizing (C) each of said filtered signals to obtain the second set of not less than two reproduction sound channels (Bl, Br) in the time domain.

Abstract translation: 本发明涉及一种用于声音空间化的方法和系统，所述方法和系统用于在多个频率子带（SBk）上编码的不少于一个音频信道的第一组声音空间化，并在变换域（F1，C，Fr，Sr， SI，Ife）转换成时域中不少于两个（B1，Br）声道的第二组，从被转换成增益的建模滤波器和适用于变换域的延迟，涉及：滤波（A）通过均衡，子带 通过施加至少一个增益和一个延迟来从每个所述编码信道生成均衡和延迟的分量来延迟信号; 添加（B）均衡和延迟信号的子集以产生对应于不小于2的多个滤波信号; 合成（C）每个所述滤波信号以获得时域中不少于两个再现声道（B1，Br）的第二组。

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：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。