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    • 4. 发明申请
    • NOISE SUPPRESSION USING MULTIPLE SENSORS OF A COMMUNICATION DEVICE
    • 使用通信设备的多个传感器的噪声抑制
    • US20120185246A1
    • 2012-07-19
    • US13174964
    • 2011-07-01
    • Xianxian ZhangJes ThyssenKwan Young Shin
    • Xianxian ZhangJes ThyssenKwan Young Shin
    • G10L21/02
    • G10L21/0208G10L2021/02161
    • Techniques are described herein that suppress noise using multiple sensors (e.g., microphones) of a communication device. Noise modeling (e.g., estimation of noise basis vectors and noise weighting vectors) is performed with respect to a noise signal during operation of a communication device to provide a noise model. The noise model includes noise basis vectors and noise coefficients that represent noise provided by audio sources other than a user of the communication device. Speech modeling (e.g., estimation of speech basis vectors and speech weighting) is performed to provide a speech model. The speech model includes speech basis vectors and speech coefficients that represent speech of the user. A noisy speech signal is processed using the noise basis vectors, the noise coefficients, the speech basis vectors, and the speech coefficients to provide a clean speech signal.
    • 本文描述了使用通信设备的多个传感器(例如,麦克风)抑制噪声的技术。 在通信设备的操作期间,相对于噪声信号执行噪声建模(例如噪声基矢量和噪声加权矢量的估计)以提供噪声模型。 噪声模型包括噪声基矢量和表示由通信设备的用户以外的音频源提供的噪声的噪声系数。 执行语音建模(例如,语音基本向量的估计和语音加权)以提供语音模型。 语音模型包括表示用户语音的语音基向量和语音系数。 使用噪声基矢量,噪声系数,语音基矢量和语音系数来处理噪声语音信号以提供干净的语音信号。
    • 6. 发明授权
    • Constrained and controlled decoding after packet loss
    • 数据包丢失后受约束和受控解码
    • US08041562B2
    • 2011-10-18
    • US12474927
    • 2009-05-29
    • Jes Thyssen
    • Jes Thyssen
    • G10L21/02
    • G10L19/0204G10L19/005G10L19/04
    • A technique is described herein for reducing audible artifacts in an audio output signal generated by decoding a received frame in a series of frames representing an encoded audio signal in a predictive coding system. In accordance with the technique, it is determined if the received frame is one of a predefined number of received frames that follow a lost frame in the series of the frames. Responsive to determining that the received frame is one of the predefined number of received frames, at least one parameter or signal associated with the decoding of the received frame is altered from a state associated with normal decoding. The received frame is then decoded in accordance with the at least one parameter or signal to generate a decoded audio signal. The audio output signal is then generated based on the decoded audio signal.
    • 本文描述了一种技术,用于通过在代表预测编码系统中的编码音频信号的一系列帧中对接收到的帧进行解码而产生的音频输出信号中减少可听见的伪影。 根据该技术,确定接收到的帧是否是在一系列帧中的丢失帧之后的预定数量的接收帧中的一个。 响应于确定接收到的帧是预定数量的接收帧之一,与所接收的帧的解码相关联的至少一个参数或信号从与正常解码相关联的状态改变。 接收的帧然后根据至少一个参数或信号被解码以产生解码的音频信号。 然后基于解码的音频信号产生音频输出信号。
    • 7. 发明授权
    • Packet loss concealment for sub-band predictive coding based on extrapolation of sub-band audio waveforms
    • 基于子带音频波形外推的子带预测编码的分组丢失隐藏
    • US08000960B2
    • 2011-08-16
    • US11838891
    • 2007-08-15
    • Juin-Hwey ChenRobert W. ZopfJes Thyssen
    • Juin-Hwey ChenRobert W. ZopfJes Thyssen
    • G10L19/10
    • G10L19/0204G10L19/005G10L19/04
    • A technique is described for concealing the effect of a lost frame in a series of frames representing an encoded audio signal in a sub-band predictive coding system. In accordance with the technique, a first synthesized sub-band audio signal is synthesized, wherein synthesizing the first synthesized sub-band audio signal comprises performing waveform extrapolation based on a stored first sub-band decoded audio signal. A second synthesized sub-band audio signal is also synthesized, wherein synthesizing the second synthesized sub-band audio signal comprises performing waveform extrapolation based on the stored second sub-band decoded audio signal. The first synthesized sub-band audio signal and the second synthesized sub-band audio signal are combined to generate a synthesized full-band output audio signal corresponding to a lost frame.
    • 描述了一种用于在子带预测编码系统中隐藏表示编码音频信号的一系列帧中的丢失帧的影响的技术。 根据该技术,合成第一合成子带音频信号,其中合成第一合成子带音频信号包括基于存储的第一子带解码音频信号执行波形外推。 还合成了第二合成子带音频信号,其中合成第二合成子带音频信号包括基于所存储的第二子带解码音频信号执行波形外推。 第一合成子带音频信号和第二合成子带音频信号被组合以产生对应于丢失帧的合成全频带输出音频信号。
    • 8. 发明申请
    • SPEAKER LOCALIZATION SYSTEM AND METHOD
    • 扬声器本地化系统和方法
    • US20100217590A1
    • 2010-08-26
    • US12391879
    • 2009-02-24
    • Elias NemerJes Thyssen
    • Elias NemerJes Thyssen
    • G10L15/20
    • G01S3/86G01S3/8006G10L15/26G10L2021/02166
    • A system and method for performing speaker localization is described. The system and method utilizes speaker recognition to provide an estimate of the direction of arrival (DOA) of speech sound waves emanating from a desired speaker with respect to a microphone array included in the system. Candidate DOA estimates may be preselected or generated by one or more other DOA estimation techniques. The system and method is suited to support steerable beamforming as well as other applications that utilize or benefit from DOA estimation. The system and method provides robust performance even in systems and devices having small microphone arrays and thus may advantageously be implemented to steer a beamformer in a cellular telephone or other mobile telephony terminal featuring a speakerphone mode.
    • 描述用于执行扬声器定位的系统和方法。 系统和方法利用说话者识别来提供相对于包括在系统中的麦克风阵列从期望的扬声器发出的语音声波的到达方向(DOA)的估计。 候选DOA估计可以由一个或多个其它DOA估计技术预先选择或产生。 该系统和方法适用于支持可导向波束形成以及利用或受益于DOA估计的其他应用。 该系统和方法即使在具有小麦克风阵列的系统和设备中也提供了强大的性能,因此可以有利地实现以引导具有扬声器电话模式的蜂窝电话或其他移动电话终端中的波束形成器。
    • 9. 发明授权
    • Apparatus and method for hybrid decoding
    • 用于混合解码的装置和方法
    • US07684521B2
    • 2010-03-23
    • US11048916
    • 2005-02-03
    • Jes ThyssenJuin-Hwey ChenNambi Seshadri
    • Jes ThyssenJuin-Hwey ChenNambi Seshadri
    • H04L27/06H03M13/00
    • H04L1/0045
    • Typical communication systems operate with a single channel decoder, and hence would have to settle for the performance from the single channel decoder regardless of the conditions of the communications channel. The present invention uses a hybrid channel decoder comprising multiple channel decoders, each configured to optimize the quality of the re-constructed signal for different channel conditions. Therefore, the desired decoder can be selected as conditions of the communications channel, or the data signal, change over time, so as to optimize the re-constructed data signal. In embodiments, the data signal is a speech signal.
    • 典型的通信系统使用单个信道解码器进行操作,因此无论通信信道的条件如何,都必须从单信道解码器处理性能。 本发明使用包括多个信道解码器的混合信道解码器,每个信道解码器被配置为优化用于不同信道条件的重构信号的质量。 因此,可以选择期望的解码器作为通信信道的条件或数据信号随时间变化,以便优化重构的数据信号。 在实施例中,数据信号是语音信号。