专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

21. 发明申请

US20170104552A1 Near Optimal Forward Error Correction System and Method 审中-公开
公开(公告)号：US20170104552A1
公开(公告)日：2017-04-13
申请号：US15287868
申请日：2016-10-07
申请人： Dolby Laboratories Licensing Corporation
发明人： Xuejing Sun , Dong Shi
IPC分类号： H04L1/00 , H03M13/35
CPC分类号： H04L1/0041 , H03M13/033 , H03M13/353 , H04L1/0009 , H04L1/0042 , H04L1/0058
摘要： A method of determining a near optimal forward error correction scheme for the transmission of audio data over a lossy packet switched network having preallocated estimated bandwidth, delay and packet losses, between at least a first and second communications devices, the method including the steps of: determining a first coding rate for the audio data; determining a peak redundancy coding rate for redundant versions of the audio data; determining an average redundancy coding rate over a period of time for redundant versions of the audio data; determining an objective function which maximizes a bitrate-perceptual audio quality mapping of the transmitted audio data including a playout function formulation; and optimising the objective function to produce a forward error correction scheme providing a high bitrate perceptual audio quality.

22. 发明授权

US11538486B2 Echo estimation and management with adaptation of sparse prediction filter set 有权
公开(公告)号：US11538486B2
公开(公告)日：2022-12-27
申请号：US17075659
申请日：2020-10-20
申请人： DOLBY LABORATORIES LICENSING CORPORATION
发明人： Dong Shi , Kai Li , Hannes Muesch , David Gunawan , Paul Holmberg , Glenn N. Dickins
IPC分类号： G10L21/0232 , H04R3/02 , G10L21/0264 , H04R3/04 , G10L21/0208 , H04R27/00
摘要： Methods for echo estimation or echo management (echo suppression or cancellation) on an input audio signal, with at least one of adaptation of a sparse prediction filter set, modification (for example, truncation) of adapted prediction filter impulse responses, generation of a composite impulse response from adapted prediction filter impulse responses, or use of echo estimation and/or echo management resources in a manner determined at least in part by classification of the input audio signal as being (or not being) echo free. Other aspects are systems configured to perform any embodiment of any of the methods.

23. 发明授权

US10811027B2 Echo estimation and management with adaptation of sparse prediction filter set 有权
公开(公告)号：US10811027B2
公开(公告)日：2020-10-20
申请号：US16308761
申请日：2017-06-07
申请人： Dolby Laboratories Licensing Corporation
发明人： Dong Shi , Kai Li , Hannes Muesch , David Gunawan , Paul Holmberg , Glenn N. Dickins
IPC分类号： H04R27/00 , H04R3/02 , G10L21/0208 , G10L21/0232 , G10L21/0264 , H04R3/04
摘要： Methods for echo estimation or echo management (echo suppression or cancellation) on an input audio signal, with at least one of adaptation of a sparse prediction filter set, modification (for example, truncation) of adapted prediction filter impulse responses, generation of a composite impulse response from adapted prediction filter impulse responses, or use of echo estimation and/or echo management resources in a manner determined at least in part by classification of the input audio signal as being (or not being) echo free. Other aspects are systems configured to perform any embodiment of any of the methods.

24. 发明授权

US10410653B2 Adaptive audio filtering 有权
公开(公告)号：US10410653B2
公开(公告)日：2019-09-10
申请号：US15558181
申请日：2016-03-21
申请人： Dolby Laboratories Licensing Corporation
发明人： Dong Shi , Glenn N. Dickins , David Gunawan , Xuejing Sun
IPC分类号： G10L19/00 , G10L21/0232 , G10L21/0208 , G10L21/028 , G10L25/21 , H04M9/08
摘要： In an audio processing system (300), a filtering section (350, 400): receives subband signals (410, 420, 430) corresponding to audio content of a reference signal (301) in respective frequency subbands; receives subband signals (411, 421, 431) corresponding to audio content of a response signal (304) in the respective subbands; and forms filtered inband references (412, 422, 432) by applying respective filters (413, 423, 433) to the subband signals of the reference signal. For a frequency subband: filtered crossband references (424, 425) are formed by multiplying, by scalar factors (426, 427), filtered inband references of other subbands; a composite filtered reference (428) is formed by summing the filtered inband reference of the subband (422) and the filtered crossband references; a residual signal (429) is computed as a difference between the composite filtered reference and the subband signal of the response signal corresponding to the subband; and the scalar factors and the filter applied to the subband signal of the reference signal corresponding to the subband are adjusted based on the residual signal.

25. 发明授权

US10405093B2 Separated audio analysis and processing 有权
公开(公告)号：US10405093B2
公开(公告)日：2019-09-03
申请号：US15577618
申请日：2016-05-26
申请人： Dolby Laboratories Licensing Corporation
发明人： Dong Shi , Xuejing Sun
IPC分类号： G06F3/16 , H03G3/30 , H03G5/02 , H03G5/16 , H04R3/04 , G10L21/02 , G10L25/18 , G10L25/21 , G10L25/48 , G10L21/0232
摘要： Example embodiments disclosed herein relate to separated audio analysis and processing. A system for processing an audio signal is disclosed. The system includes an audio analysis module configured to analyze an input audio signal to determine a processing parameter for the input audio signal, the input audio signal being represented in time domain. The system also includes an audio processing module configured to process the input audio signal in parallel with the audio analysis module. The audio processing module includes a time domain filter configured to filter the input audio signal to obtain an output audio signal in the time domain, and a filter controller configured to control a filter coefficient of the time domain filter based on the processing parameter determined by the audio analysis module. Corresponding method and computer program product of processing an audio signal are also disclosed.

26. 发明申请

US20170127089A1 Switching Between Transforms 审中-公开
公开(公告)号：US20170127089A1
公开(公告)日：2017-05-04
申请号：US15277027
申请日：2016-09-27
申请人： Dolby Laboratories Licensing Corporation
发明人： Dong Shi , Xuejing Sun , Glenn N. Dickins , David Gunawan
IPC分类号： H04N19/86 , H04N19/42
CPC分类号： G10L19/0212 , H04N19/12 , H04N19/136 , H04N19/179
摘要： A method of processing data comprises processing first frequency-domain audio or video data using signal processing of a first type, and transforming the processed first frequency-domain audio or video data to processed time-domain audio or video data using a transform which is the inverse of the first transform, and transforming the processed time-domain audio or video data using a second transform which is matched to a second type of signal processing. The method further comprises identifying time-domain audio or video data for which signal processing of the first type, after transformation using the second transform, would yield satisfactory results. The method further comprises transforming the identified time-domain audio or video data to frequency-domain identified audio or video data using the second transform, instead of using the first transform, and processing the identified frequency-domain audio or video data using signal processing of the first type.

27. 发明授权

US09552827B2 Echo control through hidden audio signals 有权
标题翻译：通过隐藏音频信号进行回波控制
公开(公告)号：US09552827B2
公开(公告)日：2017-01-24
申请号：US14409948
申请日：2013-06-27
申请人： DOLBY LABORATORIES LICENSING CORPORATION
发明人： Craig Johnston , Dong Shi , Xuejing Sun , Glenn N. Dickins
IPC分类号： H04B3/20 , G10L21/0208 , H04M9/08 , G10L21/0232
CPC分类号： G10L21/0208 , G10L21/0232 , G10L2021/02082 , H04M9/082
摘要： A method (800) for determining an estimate (215, 261) of an echo path property of an electronic device (200, 250, 300, 600). The electronic device is configured to render a total audio signal using a loudspeaker (102), and the electronic device is configured to record an echo of the rendered audio signal using a microphone (103), thereby yielding a recorded audio signal (112). The method comprises inserting (801), in an inaudible manner, an auxiliary audio signal (212) into the total audio signal to be rendered; wherein the auxiliary audio signal (212) comprises a tonal audio signal at a first frequency; isolating (803) the echo of the auxiliary audio signal (212) from the recorded audio signal (112); and determining (804) the estimate (215, 261) of the echo path property based on the inserted auxiliary audio signal (212) and based on the isolated echo of the auxiliary audio signal (212).
摘要翻译：一种用于确定电子设备（200,250,300,600）的回波路径属性的估计（215,261）的方法（800）。电子设备被配置为使用扬声器（102）呈现总音频信号，并且电子设备被配置为使用麦克风（103）记录所呈现的音频信号的回声，从而产生记录的音频信号（112）。该方法包括以无法听见的方式将辅助音频信号（212）插入（801）到要渲染的总音频信号中; 其中所述辅助音频信号（212）包括第一频率的音调音频信号; 从所记录的音频信号（112）隔离（803）辅助音频信号（212）的回波; 以及基于所插入的辅助音频信号（212）并且基于所述辅助音频信号（212）的隔离回波来确定（804）所述回波路径属性的估计（215,261）。

28. 发明授权

US09548063B2 Method and apparatus for acoustic echo control 有权
标题翻译：用于声学回声控制的方法和装置
公开(公告)号：US09548063B2
公开(公告)日：2017-01-17
申请号：US14382864
申请日：2013-03-21
申请人： DOLBY LABORATORIES LICENSING CORPORATION
发明人： Dong Shi , JiaQuan Huo , Xuejing Sun , Glenn N. Dickins
IPC分类号： H04B3/20 , G10L21/0208 , G10L21/02 , G10L25/12
CPC分类号： G10L21/0208 , G10L21/02 , G10L25/12 , G10L2021/02082
摘要： Embodiments of method and apparatus for acoustic echo control are described. According to the method, an echo energy-based doubletalk detection is performed to determine whether there is a doubletalk in a microphone signal with reference to a loudspeaker signal. A spectral similarity between spectra of the microphone signal and the loudspeaker signal is calculated. It is determined that there is no doubletalk in the microphone signal if the spectral similarity is higher than a threshold level. Adaption of an adaptive filter for applying acoustic echo cancellation or acoustic echo suppression on the microphone signal is enabled if it is determined that there is no doubletalk in the microphone signal through the echo energy-based doubletalk detection, or there is no doubletalk through the spectral similarity-based doubletalk detection.
摘要翻译：描述了用于声学回声控制的方法和装置的实施例。根据该方法，执行基于回波能量的双重检测，以确定麦克风信号中是否存在参考扬声器信号的双音节。计算麦克风信号和扬声器信号的频谱之间的频谱相似度。如果频谱相似度高于阈值电平，则确定麦克风信号中没有双音节。如果通过基于回波能量的双重检测确定了麦克风信号中没有双重位，或者通过光谱没有双重反馈，则可以使用适用于对麦克风信号进行声学回声消除或声学回声抑制的自适应滤波器基于相似度的双标检测。

29. 发明申请

US20140241528A1 Sound Field Analysis System 有权
标题翻译：声场分析系统
公开(公告)号：US20140241528A1
公开(公告)日：2014-08-28
申请号：US14187616
申请日：2014-02-24
申请人： Dolby Laboratories Licensing Corporation
发明人： David Gunawan , Dong Shi , Glenn N. Dickins
IPC分类号： H04S7/00
CPC分类号： H04S7/30 , G01S3/802 , G10L19/008 , H04S2400/15
摘要： In one embodiment, a sound field is mapped by extracting spatial angle information, diffusivity information, and optionally, sound level information. The extracted information is mapped for representation in the form of a Riemann sphere, wherein spatial angle varies longitudinally, diffusivity varies latitudinally, and level varies radially along the sphere. A more generalized mapping employs mapping the spatial angle and diffusivity information onto a representative region exhibiting variations in direction of arrival that correspond to the extracted spatial information and variations in distance that correspond to the extracted diffusivity information.
摘要翻译：在一个实施例中，通过提取空间角度信息，扩散性信息和可选地声级信息来映射声场。所提取的信息被映射为黎曼球形式的表示，其中空间角度纵向变化，扩散率在纬度上变化，并且水平面沿球体径向变化。更广义的映射将空间角度和扩散度信息映射到呈现对应于提取的空间信息的距离方向的变化方向的代表区域和对应于提取的扩散率信息的距离变化。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式