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1. 发明申请

WO2014035328A1 METHOD AND DEVICE FOR VOICE ACTIVITY DETECTION 审中-公开
标题翻译：用于语音活动检测的方法和装置
公开(公告)号：WO2014035328A1
公开(公告)日：2014-03-06
申请号：PCT/SE2013/051020
申请日：2013-08-30
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
发明人： SEHLSTEDT, Martin
IPC分类号： G10L25/78
CPC分类号： G10L25/87 , G10L19/00 , G10L19/012 , G10L21/02 , G10L25/78
摘要： In accordance with an example embodiment of the present invention, disclosed is a method and an apparatus for voice activity detection (VAD). The VAD comprises creating a signal indicative of a primary VAD decision and determining hangover addition. The determination on hangover addition is made in dependence of a short term activity measure and/or a long term activity measure. A signal indicative of a final VAD decision is then created.
摘要翻译：根据本发明的示例性实施例，公开了一种用于语音活动检测（VAD）的方法和装置。 VAD包括创建指示主VAD决定的信号并确定宿醉附加。根据短期活动措施和/或长期活动措施，确定宿醉添加量。然后产生指示最终VAD决定的信号。

2. 发明申请

WO2014129949A1 METHODS AND APPARATUSES FOR DTX HANGOVER IN AUDIO CODING 审中-公开
标题翻译： DTX HANGOVER音频编码方法与设备
公开(公告)号：WO2014129949A1
公开(公告)日：2014-08-28
申请号：PCT/SE2013/051496
申请日：2013-12-12
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
发明人： BRUHN, Stefan , JANSSON TOFTGÅRD, Tomas , SEHLSTEDT, Martin
IPC分类号： G10L19/012
CPC分类号： G10L19/012 , G10L25/84
摘要： Transmitting node and receiving node for audio coding and methods therein. The nodes being operable to encode/decode speech and to apply a discontinuous transmission (DTX) scheme comprising transmission/reception of Silence Insertion Descriptor (SID) frames during speech inactivity. The method in the transmitting node comprising determining, from amongst a number N of hangover frames, a set Y of frames being representative of background noise, and further transmitting the N hangover frames, comprising at least said set Y of frames, to the receiving node. The method further comprises transmitting a first SID frame to the receiving node in association with the transmission of the N hangover frames, where the SID frame comprises information indicating the determined set Y of hangover frames to the receiving node. The method enables the receiving node to generate comfort noise based on the hangover frames most adequate for the purpose.
摘要翻译：用于音频编码的发送节点和接收节点及其中的方法。节点可操作以对语音进行编码/解码，并且在语音不活动期间应用包括发送/接收静音插入描述符（SID）帧的不连续传输（DTX）方案。发射节点中的方法包括：从多个N个宿醉帧中确定表示背景噪声的帧集合Y，并且进一步将包括至少所述帧集合Y的N个宿醉帧发送到接收节点。所述方法还包括与所述N个宿醉帧的传输相关联地向所述接收节点发送第一SID帧，其中所述SID帧包括指示所确定的到所述接收节点的宿醉帧的集合Y的信息。该方法使得接收节点能够基于最适于该目的的宿醉帧产生舒适噪声。

3. 发明公开

EP2959480A1 METHODS AND APPARATUSES FOR DTX HANGOVER IN AUDIO CODING 有权
标题翻译：方法和DTX释放延迟器件的声音编码
公开(公告)号：EP2959480A1
公开(公告)日：2015-12-30
申请号：EP13818850.3
申请日：2013-12-12
申请人： Telefonaktiebolaget L M Ericsson (Publ)
发明人： BRUHN, Stefan , JANSSON TOFTGÅRD, Tomas , SEHLSTEDT, Martin
IPC分类号： G10L19/012
CPC分类号： G10L19/012 , G10L25/84
摘要： Transmitting node and receiving node for audio coding and methods therein. The nodes being operable to encode/decode speech and to apply a discontinuous transmission (DTX) scheme comprising transmission/reception of Silence Insertion Descriptor (SID) frames during speech inactivity. The method in the transmitting node comprising determining, from amongst a number N of hangover frames, a set Y of frames being representative of background noise, and further transmitting the N hangover frames, comprising at least said set Y of frames, to the receiving node. The method further comprises transmitting a first SID frame to the receiving node in association with the transmission of the N hangover frames, where the SID frame comprises information indicating the determined set Y of hangover frames to the receiving node. The method enables the receiving node to generate comfort noise based on the hangover frames most adequate for the purpose.

4. 发明授权

EP1982324B1 A VOICE DETECTOR AND A METHOD FOR SUPPRESSING SUB-BANDS IN A VOICE DETECTOR 有权转让
标题翻译：同意探测器和方法子带在语音探测器还原
公开(公告)号：EP1982324B1
公开(公告)日：2014-09-24
申请号：EP07709334.2
申请日：2007-02-09
申请人： Telefonaktiebolaget L- M Ericsson (publ)
发明人： SEHLSTEDT, Martin
IPC分类号： G10L25/78 , G10L19/02 , G10L21/0208 , G10L21/0232
CPC分类号： G10L19/012 , G10L19/0204 , G10L21/0208 , G10L21/0232 , G10L25/78
摘要： Embodiments of the present invention relate to a voice detector receiving an input signal that is divided into sub-signals that represent a frequency sub-band. The voice detector calculates, for each sub-band, a signal-to-noise (SNR) value based on a corresponding sub-signal for each sub-band and a background signal for each sub-band. The voice detector also calculates a power SNR value for each sub-band, where at least one of the power SNR values is calculated based on a non-linear function. The voice detector forms a single value based on the calculated power SNR values and compares the single value and a given threshold value to make a voice activity decision presented on an output port.

5. 发明申请

WO2016018186A1 ESTIMATION OF BACKGROUND NOISE IN AUDIO SIGNALS 审中-公开
标题翻译：背景噪声在音频信号中的估计
公开(公告)号：WO2016018186A1
公开(公告)日：2016-02-04
申请号：PCT/SE2015/050770
申请日：2015-07-01
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
发明人： SEHLSTEDT, Martin
IPC分类号： G10L25/78
CPC分类号： G10L19/0208 , G10L19/012 , G10L21/0324 , G10L21/0388 , G10L25/03 , G10L25/78
摘要： The invention relates to a background noise estimator and a method therein, for estimation of background noise in an audio signal. The method comprises obtaining at least one parameter associated with an audio signal segment, such as a frame or part of a frame, based on a first linear prediction gain, calculated as a quotient between a residual signal from a 0th-order linear prediction and a residual signal from a 2nd-order linear prediction for the audio signal segment; and, a second linear prediction gain calculated as a quotient between a residual signal from a 2nd-order linear prediction and a residual signal from a 16th-order linear prediction for the audio signal segment. The method further comprises determining whether the audio signal segment comprises a pause based at least on the obtained at least one parameter; and, updating a background noise estimate based on the audio signal segment when the audio signal segment comprises a pause.
摘要翻译：本发明涉及用于估计音频信号中的背景噪声的背景噪声估计器及其方法。该方法包括：基于第一线性预测增益获得与诸如帧或帧的一部分的音频信号段相关联的至少一个参数，该第一线性预测增益作为来自第0级线性预测的残差信号和用于音频信号段的二阶线性预测的残差信号; 以及作为来自二阶线性预测的残差信号与来自音频信号段的16阶线性预测的残差信号之间的商计算的第二线性预测增益。该方法还包括至少基于所获得的至少一个参数来确定音频信号段是否包括暂停; 以及当所述音频信号段包括暂停时，基于所述音频信号段来更新背景噪声估计。

6. 发明申请

WO2015094083A1 ESTIMATION OF BACKGROUND NOISE IN AUDIO SIGNALS 审中-公开
标题翻译：背景噪声在音频信号中的估计
公开(公告)号：WO2015094083A1
公开(公告)日：2015-06-25
申请号：PCT/SE2014/051427
申请日：2014-12-01
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
发明人： SEHLSTEDT, Martin
IPC分类号： G10L25/78 , G10L25/06 , G10L25/81 , G10L25/84
CPC分类号： G10L21/0208 , G10L19/18 , G10L19/24 , G10L21/0216 , G10L25/06 , G10L25/21 , G10L25/78 , G10L25/84 , G10L2025/783 , G10L2025/786 , H04M1/62 , H04W8/22
摘要： The invention relates to a background noise estimator and a method therein, for supporting sound activity detection in an audio signal segment. The method comprises reducing a current background noise estimate when the audio signal segment is determined to comprise music and the current background noise estimate exceeds a minimum value. This is to be performed when an energy level of an audio signal segment is more than a threshold higher than a long term minimum energy level, lt_min, which is determined over a plurality of preceding audio signal segments, or, when the energy level of the audio signal segment is less than a threshold higher than lt_min, but no pause is detected in the audio signal segment. Performing the method enables a more adequate sound activity detection based on the background noise estimate, as compared to the prior art.
摘要翻译：本发明涉及一种用于支持音频信号段中的声音活动检测的背景噪声估计器及其方法。该方法包括当音频信号段被确定为包括音乐并且当前背景噪声估计超过最小值时减小当前背景噪声估计。这将在音频信号段的能级大于高于多个先前音频信号段确定的长期最小能级（lt_min）的阈值时进行，或者当能量水平音频信号段小于高于lt_min的阈值，但在音频信号段中没有检测到暂停。与现有技术相比，执行该方法能够基于背景噪声估计进行更充分的声音活动检测。

7. 发明公开

EP2345027A1 ENERGY CONSERVATIVE MULTI-CHANNEL AUDIO CODING 有权
标题翻译：节能多声道音频CODING
公开(公告)号：EP2345027A1
公开(公告)日：2011-07-20
申请号：EP09819478.0
申请日：2009-09-25
申请人： Telefonaktiebolaget L M Ericsson (publ)
发明人： NORVELL, Erik , SEHLSTEDT, Martin , TALEB, Anisse
IPC分类号： G10L19/00
CPC分类号： G10L19/008
摘要： The invention relates to the technical field of audio encoding and/or decoding technologies, and thus concerns an overall encoding procedure and associated decoding procedure. The encoding procedure involves at least two signal encoding processes (S1-S3) operating on signal representations of a set of audio input channels, as well as residual encoding (S7-S8). It also involves a dedicated process (S4-S6) to estimate and encode energies of the audio input channels. Each encoding process is associated with a corresponding decoding process. In the overall decoding procedure the decoded signals from each encoding process are preferably combined such that the output channels are close to the input channels in terms of energy and/or quality. Normally, the combination step also adapts to the possible loss of one or more signal representation in part or in whole, such that the energy and quality is optimized with the signals at hand in the decoder. In this way, the overall quality of the output channels is improved.

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