公开(公告)号：US09449604B2

公开(公告)日：2016-09-20

申请号：US14498625

申请日：2014-09-26

Applicant: Huawei Technologies Co., Ltd.

Inventor： David Virette ,  Yue Lang ,  Jianfeng Xu

IPC: G10L19/008

CPC classification number: G10L19/008 ,  G10L25/06

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 for the audio channel signal a set of functions from the audio channel signal and a reference audio signal; determining a first set of encoding parameters based on a smoothing of the set of functions with respect to a frame sequence of the multi-channel audio signal, the smoothing being based on a first smoothing coefficient; determining a second set of encoding parameters based on a smoothing of the set of functions with respect to the frame sequence of the multi-channel audio signal, the smoothing being based on a second smoothing coefficient; and determining the encoding parameter based on a quality criterion with respect to the first set of encoding parameters and/or the second set of encoding parameters.

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：根据音频信道信号和参考音频信号确定音频信道信号的一组功能; 基于相对于多声道音频信号的帧序列的函数集的平滑来确定第一组编码参数，所述平滑基于第一平滑系数; 基于相对于多声道音频信号的帧序列的函数集的平滑来确定第二组编码参数，所述平滑基于第二平滑系数; 以及基于关于第一组编码参数和/或第二组编码参数的质量标准来确定编码参数。

公开(公告)号：US09293145B2

公开(公告)日：2016-03-22

申请号：US13850655

申请日：2013-03-26

Applicant: Huawei Technologies Co., Ltd.

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

IPC: G10L19/00 ,  G10L19/008 ,  G10L21/0364 ,  G10L19/025

CPC classification number: G10L19/008 ,  G10L19/025 ,  G10L21/0364

Abstract: According to the invention, a device (101, 101′) for postprocessing 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 (103; 103′) for receiving the at least one channel signal generated from the decoded downmix signal, a time envelope of the decoded downmix signal and a classification indication indicating a transient type of the at least one channel signal, wherein the classification indication is associated to the at least one channel signal, and a postprocessor (105; 105′) for postprocessing 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.

Abstract translation: 根据本发明，描述了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（101,101'），所述至少一个信道信号是通过解码的下混合信号由 低比特率音频编码/解码系统，该装置包括：接收机（103; 103'），用于接收从解码缩混信号产生的至少一个信道信号，解码缩混信号的时间包络和分类指示 指示所述至少一个信道信号的瞬时类型，其中所述分类指示与所述至少一个信道信号相关联;以及后处理器（105; 105'），用于基于所述至少一个信道信号的时间包络对所述至少一个信道信号进行后处理 解码的下混合信号由相应的加权因子加权并且依赖于分类指示。

公开(公告)号：US09236055B2

公开(公告)日：2016-01-12

申请号：US14145432

申请日：2013-12-31

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yue Lang ,  David Virette ,  Jianfeng Xu

IPC: G10L19/00 ,  G10L21/00 ,  G10L19/008 ,  H04S3/00

Abstract: Methods and devices for a low complex inter-channel difference estimation are provided. A method for the estimation of inter-channel differences (ICDs), comprises applying a transformation from a time domain to a frequency domain to a plurality of audio channel signals, calculating a plurality of ICD values for the ICDs between at least one of the plurality of audio channel signals and a reference audio channel signal over a predetermined frequency range, each ICD value being calculated over a portion of the predetermined frequency range, calculating, for each of the plurality of ICD values, a weighted ICD value by multiplying each of the plurality of ICD values with a corresponding frequency-dependent weighting factor, and calculating an ICD range value for the predetermined frequency range by adding the plurality of weighted ICD values.

公开(公告)号：US20150078555A1

公开(公告)日：2015-03-19

申请号：US14554277

申请日：2014-11-26

Applicant: Huawei Technologies Co., Ltd.

Inventor： Deming Zhang ,  David Virette ,  Yue Lang

IPC: H04S1/00

CPC classification number: H04S1/00 ,  H04M1/0202 ,  H04M1/035 ,  H04M2250/12 ,  H04R5/027 ,  H04R2499/11

Abstract: The invention relates to a portable electronic device, comprising: at least two directional microphones for stereo sound pickup, each one of the two directional microphones defining a direct sound direction and an opposite sound direction towards which the directional microphones are directed; and a housing comprising for each of the directional microphones a first hole and a second hole, the first hole being located at a different side of the portable electronic device than the second hole.

Abstract translation: 本发明涉及一种便携式电子设备，包括：用于立体声拾音的至少两个定向麦克风，两个定向麦克风中的每一个定义了定向麦克风指向的直接声音方向和相反的声音方向; 以及壳体，其包括用于每个所述定向麦克风的第一孔和第二孔，所述第一孔位于所述便携式电子设备的不同于所述第二孔的不同侧。

公开(公告)号：US20150025897A1

公开(公告)日：2015-01-22

申请号：US14509737

申请日：2014-10-08

Applicant: Huawei Technologies Co., Ltd.

Inventor： David Virette ,  Yang Gao ,  Wei Xiao

IPC: 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.

Abstract translation: 根据实施例，一种生成编码音频信号的方法，所述方法包括估计来自时频滤波器组的输入音频信号的时频能量，计算时频能量的全局方差，确定 根据全局方差的后处理方法，以及输出音频信号的编码表示以及所确定的后处理方法的指示。

公开(公告)号：US20140205100A1

公开(公告)日：2014-07-24

申请号：US14219620

申请日：2014-03-19

Applicant: Huawei Technologies Co., Ltd.

Inventor： Christof Faller ,  David Virette ,  Yue Lang

IPC: H04S7/00

CPC classification number: H04S7/307 ,  H04R2499/11 ,  H04S1/002 ,  H04S5/005

Abstract: An apparatus and a method for generating an acoustic signal with an enhanced spatial effect, said apparatus comprising a signal filter bank adapted to filter a difference audio signal with a filter characteristic to limit a bandwidth of said difference audio signal, wherein said bandwidth limited difference audio signal is applied to at least one pair of loudspeakers for dipole sound emission.

Abstract translation: 一种用于产生具有增强的空间效果的声信号的装置和方法，所述装置包括信号滤波器组，适于滤波具有滤波器特性的差分音频信号以限制所述差分音频信号的带宽，其中所述带宽限制差音频 信号被施加到用于偶极声发射的至少一对扬声器。

公开(公告)号：US20140098963A1

公开(公告)日：2014-04-10

申请号：US14102024

申请日：2013-12-10

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yue Lang ,  David Virette ,  Jianfeng Xu

IPC: G10L19/008

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

Abstract: The invention relates to a parametric audio encoder, comprising a parameter generator, the parameter generator being configured to determine a first set of encoding parameters and reference audio signal values, wherein the reference audio signal is another audio channel signal or a downmix audio signal derived from at least two audio channel signals of the plurality of multi-channel audio signals, to determine a first encoding parameter average based on the first set of encoding parameters of the audio channel signal, to determine a second encoding parameter average based on the first encoding parameter average of the audio channel signal and at least one other first encoding parameter average of the audio channel signal, and to determine the encoding parameter based on the first encoding parameter average of the audio channel signal and the second encoding parameter average of the audio channel signal.

Abstract translation: 本发明涉及一种参数音频编码器，包括参数发生器，参数发生器被配置为确定第一组编码参数和参考音频信号值，其中参考音频信号是另一个音频信道信号或从 多个多声道音频信号的至少两个音频通道信号，以基于音频通道信号的第一组编码参数来确定第一编码参数平均值，以基于第一编码参数确定第二编码参数平均值 音频信道信号的平均值和音频信道信号的至少一个其它第一编码参数平均值，并且基于音频信道信号的第一编码参数平均值和音频信道信号的第二编码参数平均值来确定编码参数 。