公开(公告)号：US20130279702A1

公开(公告)日：2013-10-24

申请号：US13852554

申请日：2013-03-28

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yue Lang ,  David Virette ,  Lei Miao ,  Wenhai Wu

IPC: G10L19/008

CPC classification number: G10L19/008 ,  G10L21/0364

Abstract: According to the invention, a device for post-processing at least one channel signal of a plurality of channel signals of a multi-channel signal is described, the at least one channel signal being generated from a decoded downmix signal by a low-bit-rate audio coding/decoding system, the device comprising: a receiver for receiving the at least one channel signal generated from the decoded downmix signal, a time envelope of the decoded downmix signal, an interchannel time difference between the channel signal and the downmix signal, and a classification indication indicating a transient type of the downmix signal; and a post-processor for post-processing the at least one channel signal based on the time envelope of the decoded downmix signal weighted by a respective weighting factor and in dependence on the classification indication and the interchannel time difference.

Abstract translation: 根据本发明，描述了一种用于后处理多信道信号的多个信道信号的至少一个信道信号的装置，所述至少一个信道信号是通过低比特率信号从解码的下混信号产生的， 所述装置包括：接收器，用于接收从解码的下混合信号产生的至少一个信道信号，解码的下混合信号的时间包络，信道信号和下混合信号之间的信道间时间差， 以及指示下混合信号的瞬时类型的分类指示; 以及后处理器，用于基于由各个加权因子加权的解码缩混信号的时间包，并且根据分类指示和通道间时间差，对至少一个信道信号进行后处理。

公开(公告)号：US20130129096A1

公开(公告)日：2013-05-23

申请号：US13744690

申请日：2013-01-18

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Christof Faller ,  David Virette ,  Yue Lang ,  Jianfeng Xu

IPC: G10L19/008

CPC classification number: G10L19/008

Abstract: The invention relates to an audio signal synthesizer, the audio signal synthesizer comprises a transformer for transforming the down-mix audio signal into frequency domain to obtain a transformed audio signal; a signal generator for generating a first auxiliary signal, for generating a second auxiliary signal, and for generating a third auxiliary signal upon the basis of the transformed audio signal; a de-correlator for generating a first de-correlated signal, and for generating a second de-correlated signal from the third auxiliary signal, the first de-correlated signal and the second de-correlated signal being at least partly de-correlated; and a combiner for combining the first auxiliary signal with the first de-correlated signal to obtain a first audio signal, and for combining the second auxiliary signal with the second de-correlated signal to obtain the second audio signal, the first audio signal and the second audio signal forming the multi-channel audio signal.

Abstract translation: 音频信号合成器本发明涉及一种音频信号合成器，该音频信号合成器包括一个变换器，用于将混音音频信号转换成频域以获得经变换的音频信号; 信号发生器，用于产生第一辅助信号，用于产生第二辅助信号，并且用于根据经变换的音频信号产生第三辅助信号; 一个去相关器，用于产生第一去相关信号，并用于从第三辅助信号产生第二去相关信号，第一去相关信号和第二解相关信号至少部分地去相关; 以及组合器，用于将第一辅助信号与第一去相关信号组合以获得第一音频信号，并且用于将第二辅助信号与第二去相关信号组合以获得第二音频信号，第一音频信号和 形成多声道音频信号的第二音频信号。

公开(公告)号：US09774981B2

公开(公告)日：2017-09-26

申请号：US14725063

申请日：2015-05-29

Applicant: Huawei Technologies Co., Ltd.

Inventor： Wenyu Jin ,  Willem Bastiaan Kleijn ,  David Virette

IPC: H04S7/00

CPC classification number: H04S7/307 ,  H04S7/30 ,  H04S2400/11

Abstract: An audio rendering system is provided that comprises a plurality of loudspeakers arranged to approximate a desired spatial sound field within a predetermined reproduction region, wherein the loudspeakers are configured to approximate the sound field based on a weighted series of orthonormal basis functions for the reproduction region.

公开(公告)号：US09646616B2

公开(公告)日：2017-05-09

申请号：US14509737

申请日：2014-10-08

Applicant: Huawei Technologies Co., Ltd.

Inventor： David Virette ,  Yang Gao ,  Wei Xiao

IPC: G10L19/26 ,  G10L25/03 ,  G10L25/18 ,  G10L19/00

CPC classification number: G10L19/00 ,  G10L19/26 ,  G10L25/18

Abstract: In accordance with an embodiment, a method of generating an encoded audio signal, the method includes estimating a time-frequency energy of an input audio signal from a time-frequency filter bank, computing a global variance of the time-frequency energy, determining a post-processing method according to the global variance, and transmitting an encoded representation of the input audio signal along with an indication of the determined post-processing method.

公开(公告)号：US09324329B2

公开(公告)日：2016-04-26

申请号：US14145328

申请日：2013-12-31

Applicant: Huawei Technologies Co., Ltd.

Inventor： David Virette ,  Yue Lang ,  Jianfeng Xu

IPC: G10L19/008 ,  H04S3/00

CPC classification number: G10L19/008 ,  H04S3/00

Abstract: A method for parametric spatial audio coding of a multi-channel audio signal comprising a plurality of audio channel signals is provided, the method comprising: calculating at least two different spatial coding parameters for an audio channel signal of the plurality of audio channel signals, selecting at least one spatial coding parameter of the at least two different spatial coding parameters associated with the audio channel signal on the basis of the values of the calculated spatial coding parameters; including a quantized representation of the selected spatial coding parameter into a parameter section of an audio bitstream; and setting a parameter type flag in the parameter section of the audio bitstream indicating the type of the selected spatial coding parameter being included into the audio bitstream.

Abstract translation: 提供了一种包括多个音频信道信号的多声道音频信号的参数空间音频编码的方法，所述方法包括：为所述多个音频信道信号的音频信道信号计算至少两个不同的空间编码参数，选择 基于所计算的空间编码参数的值，与所述音频信道信号相关联的所述至少两个不同空间编码参数中的至少一个空间编码参数; 包括所选择的空间编码参数的量化表示到音频比特流的参数部分中; 以及在音频比特流的参数部分中设置参数类型标志，该参数部分指示被包括在音频比特流中的所选择的空间编码参数的类型。

公开(公告)号：US20150262590A1

公开(公告)日：2015-09-17

申请号：US14716289

申请日：2015-05-19

Applicant: Huawei Technologies Co., Ltd.

Inventor： Cyril Joder ,  Felix Weninger ,  Bjoern Schuller ,  David Virette

IPC: G10L21/0208

CPC classification number: G10L21/0208 ,  G10L21/0216 ,  G10L21/0232

Abstract: A method for reconstructing at least one target signal comprises determining a first set of feature vectors from the input signal, the first set of feature vectors forming a non-negative input matrix; determining a second set of feature vectors, the second set of feature vectors forming a non-negative noise matrix; decomposing the input matrix into a sum of a first matrix and a second matrix, the first matrix representing a product of a non-negative bases matrix and a non-negative weight matrix, and the second matrix representing a combination of the noise matrix and a noise weight vector; and reconstructing the at least one target signal based on the non-negative bases matrix and the non-negative weight matrix.

Abstract translation: 一种用于重构至少一个目标信号的方法包括从所述输入信号确定第一组特征向量，所述第一组特征向量形成非负输入矩阵; 确定第二组特征向量，所述第二组特征向量形成非负噪声矩阵; 将输入矩阵分解为第一矩阵和第二矩阵的和，第一矩阵表示非负基数矩阵和非负权重矩阵的乘积，第二矩阵表示噪声矩阵和 噪声权重向量; 以及基于所述非负基数矩阵和所述非负权重矩阵来重构所述至少一个目标信号。

公开(公告)号：US20140211947A1

公开(公告)日：2014-07-31

申请号：US14227695

申请日：2014-03-27

Applicant: Huawei Technologies Co., Ltd.

Inventor： Wenhai Wu ,  Lei Miao ,  Yue Lang ,  David Virette

IPC: H04S3/02

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

Abstract: An embodiment of the present invention provides a method for generating a downmixed signal, including: performing a time-frequency transform on a received left sound channel signal and a received right sound channel signal to obtain a frequency domain signal, and dividing the frequency domain signal into several frequency bands; calculating a sound channel energy ratio and a sound channel phase difference of each frequency band; calculating a phase difference between the downmixed signal and a first sound channel signal in each frequency band according to the sound channel energy ratio and the sound channel phase difference; and calculating a frequency domain downmixed signal according to the left sound channel signal, the right sound channel signal, and the phase difference between the downmixed signal and the first sound channel signal in each frequency band. This method effectively improves quality of stereo encoding and decoding.

Abstract translation: 本发明的实施例提供了一种用于产生下混合信号的方法，包括：对接收到的左声道信号和接收到的右声道信号执行时频变换以获得频域信号，并且将频域信号 进入几个频带; 计算每个频带的声道能量比和声道相位差; 根据声道能量比和声道相位差计算每个频带中的下混合信号与第一声道信号之间的相位差; 以及根据左声道信号，右声道信号以及每个频带中的下混合信号和第一声道信号之间的相位差来计算频域缩混信号。 该方法有效提高立体声编码和解码质量。

公开(公告)号：US20140112482A1

公开(公告)日：2014-04-24

申请号：US14145328

申请日：2013-12-31

Applicant: Huawei Technologies Co., Ltd.

Inventor： David Virette ,  Yue Lang ,  Jianfeng Xu

IPC: G10L19/008

CPC classification number: G10L19/008 ,  H04S3/00

Abstract: A method for parametric spatial audio coding of a multi-channel audio signal comprising a plurality of audio channel signals is provided, the method comprising: calculating at least two different spatial coding parameters for an audio channel signal of the plurality of audio channel signals, selecting at least one spatial coding parameter of the at least two different spatial coding parameters associated with the audio channel signal on the basis of the values of the calculated spatial coding parameters; including a quantized representation of the selected spatial coding parameter into a parameter section of an audio bitstream; and setting a parameter type flag in the parameter section of the audio bitstream indicating the type of the selected spatial coding parameter being included into the audio bitstream.

Abstract translation: 提供了一种包括多个音频信道信号的多声道音频信号的参数空间音频编码的方法，所述方法包括：为所述多个音频信道信号的音频信道信号计算至少两个不同的空间编码参数，选择 基于所计算的空间编码参数的值，与所述音频信道信号相关联的所述至少两个不同空间编码参数中的至少一个空间编码参数; 包括所选择的空间编码参数的量化表示到音频比特流的参数部分中; 以及在音频比特流的参数部分中设置参数类型标志，该参数部分指示被包括在音频比特流中的所选择的空间编码参数的类型。

公开(公告)号：US09800453B2

公开(公告)日：2017-10-24

申请号：US13957078

申请日：2013-08-01

Applicant: Huawei Technologies Co., Ltd.

Inventor： Anisse Taleb ,  Jianfeng Xu ,  David Virette

IPC: G10L19/08 ,  G10L19/12 ,  G10L25/06 ,  H04L29/06 ,  G10L25/12 ,  G10L19/06

CPC classification number: H04L29/0651 ,  G10L19/06 ,  G10L19/08 ,  G10L25/06 ,  G10L25/12

Abstract: A method and apparatus for providing signal processing coefficients for processing an input signal at a predetermined signal processing sampling rate, wherein the input signal is received at an input signal sampling rate, the method comprising the steps of computing a correlation or covariance function based on the received input signal at the input signal sampling rate to provide correlation or covariance coefficients at the input signal sampling rate, re-sampling the computed correlation or covariance coefficients having the input signal sampling rate to provide correlation or covariance coefficients at the predetermined signal processing sampling rate, and calculating the signal processing coefficients based on the correlation or covariance coefficients at the predetermined signal processing sampling rate.

公开(公告)号：US09449603B2

公开(公告)日：2016-09-20

申请号：US14498613

申请日：2014-09-26

Applicant: Huawei Technologies Co., Ltd.

Inventor： David Virette ,  Yue Lang ,  Jianfeng Xu

IPC: G10L19/008 ,  G10L19/02

CPC classification number: G10L19/008 ,  G10L19/0204

Abstract: The invention relates to a method for determining an encoding parameter for an audio channel signal of a multi-channel audio signal, the method comprising: determining a frequency transform of the audio channel signal; determining a frequency transform of a reference audio signal; determining inter channel differences for at least each frequency sub-band of a subset of frequency sub-bands, each inter channel difference indicating a phase difference or time difference between a band-limited signal portion of the audio channel signal and a band-limited signal portion of the reference audio signal in the respective frequency sub-band the inter-channel difference is associated to; determining a first average based on positive values of the inter-channel differences and determining a second average based on negative values of the inter-channel differences; and determining the encoding parameter based on the first average and on the second average.

Abstract translation: 本发明涉及一种用于确定多声道音频信号的音频信道信号的编码参数的方法，该方法包括：确定音频信道信号的频率变换; 确定参考音频信号的频率变换; 确定频率子带子集的至少每个频率子带的信道间差异，每个信道间差异指示音频信道信号的带限信号部分与频带限制信号之间的相位差或时间差 相应频率子带中的参考音频信号的部分信道间差异相关联; 基于信道间差异的正值确定第一平均值，并且基于信道间差异的负值确定第二平均值; 以及基于所述第一平均值和所述第二平均值确定所述编码参数。