公开(公告)号：US09812141B2

公开(公告)日：2017-11-07

申请号：US13518525

申请日：2011-01-07

申请人： Takehiro Moriya ,  Noboru Harada ,  Yutaka Kamamoto

发明人： Takehiro Moriya ,  Noboru Harada ,  Yutaka Kamamoto

IPC分类号： G10L19/14 ,  G10L19/09

CPC分类号： G10L19/09 ,  G10L19/032

摘要： In encoding, pitch periods for time series signals in a predetermined time interval are calculated, and a code corresponding thereto is output. In that encoding, the resolutions for expressing the pitch periods and/or a pitch period encoding mode are switched according to whether an index indicating a periodicity and/or stationarity level of the time series signals satisfies a condition indicating high or low in periodicity and/or stationarity. In that decoding, according to whether an index indicating a periodicity and/or stationarity level, the index being included in or obtained from an input code corresponding to the predetermined time interval, satisfies a condition indicating high periodicity and/or stationarity, a decoding mode for a code, included in the input code, corresponding to pitch periods is switched to decode the code corresponding to the pitch periods to obtain the pitch periods corresponding to the predetermined time interval.

公开(公告)号：US09454974B2

公开(公告)日：2016-09-27

申请号：US11610104

申请日：2006-12-13

申请人： Venkatesh Krishnan ,  Ananthapadmanabhan A. Kandhadai

发明人： Venkatesh Krishnan ,  Ananthapadmanabhan A. Kandhadai

IPC分类号： G10L19/14 ,  G10L21/038 ,  G10L19/02 ,  G10L25/18

CPC分类号： G10L21/038 ,  G10L19/0204 ,  G10L25/18

摘要： The range of disclosed configurations includes methods in which subbands of a speech signal are separately encoded, with the excitation of a first subband being derived from a second subband. Gain factors are calculated to indicate a time-varying relation between envelopes of the original first subband and of the synthesized first subband. The gain factors are quantized, and quantized values that exceed the pre-quantized values are re-coded.

摘要翻译： 所公开的配置的范围包括其中语音信号的子带被分开编码的方法，第一子带的激励是从第二子带导出的。 计算增益因子以指示原始第一子带和合成的第一子带的包络之间的时变关系。 对增益因子进行量化，并重新编码超过预量化值的量化值。

公开(公告)号：US09336785B2

公开(公告)日：2016-05-10

申请号：US12464498

申请日：2009-05-12

申请人： Jes Thyssen ,  Wilfrid LeBlanc ,  Juin-Hwey Chen

发明人： Jes Thyssen ,  Wilfrid LeBlanc ,  Juin-Hwey Chen

IPC分类号： G10L19/14 ,  G10L19/012 ,  G10L21/0208 ,  G10L21/0232

CPC分类号： G10L21/0208 ,  G10L19/012 ,  G10L21/0232

摘要： A speech intelligibility enhancement (SIE) system and method is described that improves the intelligibility of a speech signal to be played back by an audio device when the audio device is located in an environment with loud acoustic background noise. In an embodiment, the audio device comprises a near-end telephony terminal and the speech signal comprises a speech signal received over a communication network from a far-end telephony terminal for playback at the near-end telephony terminal.

摘要翻译： 描述了一种语音清晰度增强（SIE）系统和方法，当音频设备位于具有大声背景噪声的环境中时，提高了由音频设备重放的语音信号的可懂度。 在一个实施例中，音频设备包括近端电话终端，并且语音信号包括通过通信网络从远端电话终端接收的用于在近端电话终端回放的语音信号。

公开(公告)号：US08898058B2

公开(公告)日：2014-11-25

申请号：US13280192

申请日：2011-10-24

申请人： Jongwon Shin ,  Erik Visser ,  Ian Ernan Liu

发明人： Jongwon Shin ,  Erik Visser ,  Ian Ernan Liu

IPC分类号： G10L11/06 ,  G10L15/20 ,  G10L19/14 ,  G10L21/02 ,  G10L15/04 ,  G10L15/00 ,  G10L19/12 ,  G10L25/78

CPC分类号： G10L25/78 ,  G10L25/18 ,  G10L2025/786

摘要： Systems, methods, apparatus, and machine-readable media for voice activity detection in a single-channel or multichannel audio signal are disclosed.

摘要翻译： 公开了用于单通道或多声道音频信号中的语音活动检测的系统，方法，装置和机器可读介质。

公开(公告)号：US08788275B2

公开(公告)日：2014-07-22

申请号：US11902325

申请日：2007-09-20

申请人： Miyuki Shirakawa ,  Masanao Suzuki ,  Takashi Makiuchi ,  Yoshiteru Tsuchinaga

发明人： Miyuki Shirakawa ,  Masanao Suzuki ,  Takashi Makiuchi ,  Yoshiteru Tsuchinaga

IPC分类号： G06F15/00 ,  G10L11/04 ,  G10L19/00 ,  G10L21/04 ,  G10L19/14

CPC分类号： G10L19/24 ,  G10L21/0364

摘要： A decoding apparatus decodes a first encoded data that is encoded from a low-frequency component of an audio signal, and a second encoded data that is used when creating a high-frequency component of an audio signal from a low-frequency component and encoded in accordance with a certain bandwidth, into the audio signal. In the decoding apparatus, a high-frequency component detecting unit divides the high-frequency component into bands with a certain interval range correspondingly to the certain bandwidth, and detects magnitude of the high-frequency components corresponding to each of the bands. A high-frequency component compensating unit compensates the high-frequency components based on the magnitude of the high-frequency components corresponding to each of the bands detected by the high-frequency component detecting unit. A decoding unit that decodes the low-frequency component decoded from the first encoded data, and the high-frequency components compensated by the high-frequency component compensating unit, into the audio signal.

摘要翻译： 解码装置对从音频信号的低频分量编码的第一编码数据和从低频分量创建音频信号的高频分量而使用的第二编码数据进行解码， 按照一定的带宽，进入音频信号。 在解码装置中，高频成分检测部将该高频成分与特定带宽对应地设定为一定的间隔范围的频带，并检测与各频带对应的高频成分的大小。 高频分量补偿单元基于与由高频分量检测单元检测到的每个频带对应的高频分量的大小来补偿高频分量。 解码单元，将从第一编码数据解码的低频分量和由高频分量补偿单元补偿的高频分量解码成音频信号。

公开(公告)号：US08706480B2

公开(公告)日：2014-04-22

申请号：US12663828

申请日：2008-06-05

申请人： Juergen Herre ,  Ralf Geiger ,  Stefan Bayer ,  Guillaume Fuchs ,  Ulrich Kraemer ,  Nikolaus Rettelbach ,  Bernhard Grill

发明人： Juergen Herre ,  Ralf Geiger ,  Stefan Bayer ,  Guillaume Fuchs ,  Ulrich Kraemer ,  Nikolaus Rettelbach ,  Bernhard Grill

IPC分类号： G10L19/14

CPC分类号： G10L19/20

摘要： An audio encoder for encoding an audio signal includes an impulse extractor for extracting an impulse-like portion from the audio signal. This impulse-like portion is encoded and forwarded to an output interface. Furthermore, the audio encoder includes a signal encoder which encodes a residual signal derived from the original audio signal so that the impulse-like portion is reduced or eliminated in the residual audio signal. The output interface forwards both, the encoded signals, i.e., the encoded impulse signal and the encoded residual signal for transmission or storage. On the decoder-side, both signal portions are separately decoded and then combined to obtain a decoded audio signal.

摘要翻译： 用于对音频信号进行编码的音频编码器包括用于从音频信号中提取脉冲状部分的脉冲提取器。 该脉冲状部分被编码并转发到输出接口。 此外，音频编码器包括信号编码器，其对从原始音频信号导出的残留信号进行编码，从而在残留音频信号中减少或消除脉冲状部分。 输出接口转发编码的信号，即编码的脉冲信号和编码的残留信号用于传输或存储。 在解码器侧，两个信号部分被单独解码，然后被组合以获得解码的音频信号。

公开(公告)号：US08600765B2

公开(公告)日：2013-12-03

申请号：US13728201

申请日：2012-12-27

申请人： Huawei Technologies Co., Ltd.

发明人： Zexin Liu ,  Lei Miao ,  Anisse Taleb

IPC分类号： G10L19/00 ,  G10L19/02 ,  G10L15/00 ,  G10L19/14 ,  G10L11/04

CPC分类号： G10L19/265 ,  G10L19/008 ,  G10L19/0204 ,  G10L19/20 ,  G10L21/0388

摘要： Embodiments of the present invention provide a signal classification method and device, and encoding and decoding methods and devices. The encoding method includes: dividing a current frame into a low-frequency band signal and a high-frequency band signal; attenuating the high-frequency band signal or a to-be-encoded characteristic parameter of the high-frequency band signal according to an energy attenuation value of the low-frequency band signal, where the energy attenuation value indicates energy attenuation of the low-frequency band signal caused by encoding of the low-frequency band signal; and encoding the attenuated high-frequency band signal or the attenuated to-be-encoded characteristic parameter of the high-frequency band signal. The technical solutions according to the embodiments of the present invention can improve the effect of combining the low-frequency band signal and the high-frequency band signal at the decoder.

摘要翻译： 本发明的实施例提供信号分类方法和装置，以及编码和解码方法和装置。 该编码方法包括：将当前帧划分成低频带信号和高频带信号; 根据低频带信号的能量衰减值对高频带信号的高频带信号或待编码的特征参数进行衰减，其中能量衰减值表示低频带信号的能量衰减 由低频带信号的编码引起的频带信号; 对衰减的高频带信号或衰减的待编码的高频信号的特征参数进行编码。 根据本发明的实施例的技术方案可以改善在解码器处组合低频带信号和高频带信号的效果。

公开(公告)号：US08600764B2

公开(公告)日：2013-12-03

申请号：US12717095

申请日：2010-03-03

申请人： Jae Mi Bahn

发明人： Jae Mi Bahn

IPC分类号： G10L19/00 ,  G10L19/14

CPC分类号： G10L19/032

摘要： Disclosed herein is a quantization method and apparatus of an audio encoder. The quantization method comprises calculating an absolute value of a maximum frequency spectrum of a first frame, externally received, by analyzing frequency spectrum data of the first frame, setting an initial value of a common scale factor to be used to quantize the first frame based on the absolute value of the maximum frequency spectrum of the first frame and an absolute value of a maximum frequency spectrum of a second frame, which has previously been calculated, and quantizing the frequency spectrum data of the first frame based on the set initial value of the common scale factor. Accordingly, before quantization is performed, an initial value of a common scale factor which is almost close to a value of an actual common scale factor can be previously set.

摘要翻译： 这里公开了音频编码器的量化方法和装置。 量化方法包括：通过分析第一帧的频谱数据来计算从外部接收的第一帧的最大频谱的绝对值，设置用于量化第一帧的公共比例因子的初始值，基于 先前已经计算出的第一帧的最大频谱的绝对值和第二帧的最大频谱的绝对值，并且基于所设置的初始值对第一帧的频谱数据进行量化 共同比例因子。 因此，在进行量化之前，可以预先设定几乎接近于实际共同比例因子的值的公共比例因子的初始值。

公开(公告)号：US20130297298A1

公开(公告)日：2013-11-07

申请号：US13464833

申请日：2012-05-04

申请人： Jaekwon Yoo ,  Ruxin Chen

发明人： Jaekwon Yoo ,  Ruxin Chen

IPC分类号： G10L19/14

CPC分类号： G10L21/0272 ,  G10L2021/02082 ,  G10L2021/02166

摘要： Methods and apparatus for signal processing are disclosed. Source separation can be performed to extract source signals from mixtures of source signals by way of independent component analysis. Source separation described herein involves mixed multivariate probability density functions that are mixtures of component density functions having different parameters corresponding to frequency components of different sources, different time segments, or some combination thereof.

摘要翻译： 公开了用于信号处理的方法和装置。 可以通过独立分量分析来执行源分离以从源信号的混合中提取源信号。 本文描述的源分离涉及混合多元概率密度函数，其是具有对应于不同源的频率分量，不同时间段或其某些组合的不同参数的组分密度函数的混合。

公开(公告)号：US08560304B2

公开(公告)日：2013-10-15

申请号：US11877015

申请日：2007-10-23

申请人： Ki-hyun Choo ,  Anton Porov ,  Eun-mi Oh ,  Jung-hoo Kim

发明人： Ki-hyun Choo ,  Anton Porov ,  Eun-mi Oh ,  Jung-hoo Kim

IPC分类号： G10L19/14

CPC分类号： G10L19/0204 ,  G10L21/038

摘要： Provided is a method and apparatus for encoding or decoding a signal corresponding to a high frequency band in an audio signal. The method and apparatus for encoding a high frequency band detects and encodes frequency component(s) according to a pre-set criterion from a signal corresponding to a frequency band higher than a pre-set frequency and encodes energy value(s) of a signal to reconstruct band(s) in which the detected frequency component(s) are included. The method and apparatus for decoding a high frequency band decodes the signal by adjusting a signal to reconstruct a band in which important frequency component(s) are included by considering an energy value of the important frequency component(s). Accordingly, even though encoding or decoding is performed using a small number of bits, there is no degradation in sound quality of a signal corresponding to a high frequency band, and thus coding efficiency can be maximized.

摘要翻译： 提供了一种用于对与音频信号中的高频带相对应的信号进行编码或解码的方法和装置。 用于编码高频带的方法和装置根据来自对应于高于预定频率的频带的信号的预设标准来检测和编码频率分量，并对信号的能量值进行编码 以重建其中包括检测到的频率分量的频带。 用于解码高频带的方法和装置通过调整信号来重构信号，以通过考虑重要频率分量的能量值来重构其中包括重要频率分量的频带。 因此，即使使用少量的比特来进行编码或解码，也不会使与高频带对应的信号的声音质量下降，能够最大化编码效率。