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1. 发明申请

US20080095401A1 ULTRASONIC CAMERA TRACKING SYSTEM AND ASSOCIATED METHODS 有权
标题翻译：超声相机追踪系统及相关方法
公开(公告)号：US20080095401A1
公开(公告)日：2008-04-24
申请号：US11872303
申请日：2007-10-15
申请人： Youssef Saleh , Peter Chu , Jinwei Feng , Alain Nimri
发明人： Youssef Saleh , Peter Chu , Jinwei Feng , Alain Nimri
IPC分类号： G06K9/00
CPC分类号： G01S5/22 , G01S3/808 , H04N7/15
摘要： A camera tracking system includes a controllable camera, an array of microphones, and a controller. The microphones are positioned adjacent the controllable camera and are at least responsive to ultrasound emitted from a source. The microphones may additionally be capable of responding to sound in the audible spectrum. The controller receives ultrasound signals communicated from the microphones in response to ultrasound emitted from the source and processes the ultrasound signals to determine an at least approximate location of the source. Then, the controller sends one or more command signals to the controllable camera to direct at least approximately at the determined location of the source. The camera tracking system tracks the source as it moves and continues to emit ultrasound. The source can be an emitter pack having one or more ultrasonic transducers that produce tones that sweep form about 24-kHz to about 40-kHz.
摘要翻译：相机跟踪系统包括可控相机，麦克风阵列和控制器。麦克风位于可控照相机附近，并且至少响应于从源发出的超声波。麦克风可以另外能够响应可听频谱中的声音。控制器响应于从源发射的超声波接收从麦克风传送的超声信号，并处理超声信号以确定源的至少近似位置。然后，控制器将一个或多个命令信号发送到可控照相机，以至少大致指向源的确定位置。相机跟踪系统在移动时跟踪源，并继续发射超声波。源可以是具有一个或多个超声波换能器的发射器组，其产生大约24kHz至大约40kHz的扫描的音调。

2. 发明授权

US08249298B2 Ultrasonic camera tracking system and associated methods 有权
标题翻译：超声波相机跟踪系统及相关方法
公开(公告)号：US08249298B2
公开(公告)日：2012-08-21
申请号：US11872303
申请日：2007-10-15
申请人： Youssef Saleh , Peter Chu , Jinwei Feng , Alain Nimri
发明人： Youssef Saleh , Peter Chu , Jinwei Feng , Alain Nimri
IPC分类号： G06K9/00
CPC分类号： G01S5/22 , G01S3/808 , H04N7/15
摘要： A camera tracking system includes a controllable camera, an array of microphones, and a controller. The microphones are positioned adjacent the controllable camera and are at least responsive to ultrasound emitted from a source. The microphones may additionally be capable of responding to sound in the audible spectrum. The controller receives ultrasound signals communicated from the microphones in response to ultrasound emitted from the source and processes the ultrasound signals to determine an at least approximate location of the source. Then, the controller sends one or more command signals to the controllable camera to direct at least approximately at the determined location of the source. The camera tracking system tracks the source as it moves and continues to emit ultrasound. The source can be an emitter pack having one or more ultrasonic transducers that produce tones that sweep form about 24-kHz to about 40-kHz.
摘要翻译：相机跟踪系统包括可控相机，麦克风阵列和控制器。麦克风位于可控照相机附近，并且至少响应于从源发出的超声波。麦克风可以另外能够响应可听频谱中的声音。控制器响应于从源发射的超声波接收从麦克风传送的超声信号，并处理超声信号以确定源的至少近似位置。然后，控制器将一个或多个命令信号发送到可控照相机，以至少大致指向源的确定位置。相机跟踪系统在移动时跟踪源，并继续发射超声波。源可以是具有一个或多个超声波换能器的发射器组，其产生大约24kHz至大约40kHz的扫描的音调。

3. 发明授权

US08248448B2 Automatic camera framing for videoconferencing 有权
标题翻译：视频会议自动摄像机框架
公开(公告)号：US08248448B2
公开(公告)日：2012-08-21
申请号：US12782155
申请日：2010-05-18
申请人： Jinwei Feng , Peter Chu , Wayne Dunlap , Jonathan Gallmeier , Alain Nimri , Stephen P. Schaefer
发明人： Jinwei Feng , Peter Chu , Wayne Dunlap , Jonathan Gallmeier , Alain Nimri , Stephen P. Schaefer
IPC分类号： H04M11/00
CPC分类号： H04N7/142 , G06K9/00234 , G10L25/78 , H04N5/232
摘要： A videoconferencing apparatus automatically tracks speakers in a room and dynamically switches between a controlled, people-view camera and a fixed, room-view camera. When no one is speaking, the apparatus shows the room view to the far-end. When there is a dominant speaker in the room, the apparatus directs the people-view camera at the dominant speaker and switches from the room-view camera to the people-view camera. When there is a new speaker in the room, the apparatus switches to the room-view camera first, directs the people-view camera at the new speaker, and then switches to the people-view camera directed at the new speaker. When there are two near-end speakers engaged in a conversation, the apparatus tracks and zooms-in the people-view camera so that both speakers are in view.
摘要翻译：视频会议设备自动跟踪房间中的扬声器，并在受控的人民摄像机和固定的室内摄像机之间动态切换。当没有人在说话的时候，设备会显示到远端的房间视图。当房间中有主导扬声器时，设备将人物摄像机引导到主扬声器，并从室内摄像机切换到人民摄像机。当房间里有一个新的扬声器时，设备首先切换到室内摄像机，将人物摄像机引导到新的扬声器，然后切换到指向新扬声器的人物摄像机。当有两个近端扬声器进行通话时，该设备将跟踪和放大人民摄像机，以便两个扬声器都在视野中。

4. 发明申请

US20120004918A1 Full-Band Scalable Audio Codec 有权
标题翻译：全频段可扩展音频编解码器
公开(公告)号：US20120004918A1
公开(公告)日：2012-01-05
申请号：US12829233
申请日：2010-07-01
申请人： Jinwei Feng , Peter Chu
发明人： Jinwei Feng , Peter Chu
IPC分类号： G10L19/00
CPC分类号： G10L19/002 , G10L19/0212 , G10L19/24 , G10L25/18
摘要： A scalable audio codec for a processing device determines first and second bit allocations for each frame of input audio. First bits are allocated for a first frequency band, and second bits are allocated for a second frequency band. The allocations are made on a frame-by-frame basis based on the energy ratio between the two bands. For each frame, the codec transform codes both frequency bands into two sets of transform coefficients, which are then packetized based on the bit allocations. The packets are then transmitted with the processing device. Additionally, the frequency regions of the transform coefficients can be arranged in order of importance determined by power levels and perceptual modeling. Should bit stripping occur, the decoder at a receiving device can produce audio of suitable quality given that bits have been allocated between the bands and the regions of transform coefficients have been ordered by importance.
摘要翻译：用于处理设备的可扩展音频编解码器确定每帧输入音频的第一和第二位分配。为第一频带分配第一比特，并且为第二频带分配第二比特。基于两个频带之间的能量比，逐帧地进行分配。对于每个帧，编解码转换将两个频带编码成两组变换系数，然后根据比特分配进行分组。然后与处理装置一起发送分组。此外，变换系数的频率区域可以按照由功率水平和感知建模确定的重要性的顺序排列。如果发生位剥离，则在接收设备处的解码器可以产生具有合适质量的音频，因为在带之间已经分配了位，并且已经按照重要性排列了变换系数的区域。

5. 发明授权

US08386266B2 Full-band scalable audio codec 有权
标题翻译：全频段可扩展音频编解码器
公开(公告)号：US08386266B2
公开(公告)日：2013-02-26
申请号：US12829233
申请日：2010-07-01
申请人： Jinwei Feng , Peter Chu
发明人： Jinwei Feng , Peter Chu
IPC分类号： G10L19/00
CPC分类号： G10L19/002 , G10L19/0212 , G10L19/24 , G10L25/18
摘要： A scalable audio codec for a processing device determines first and second bit allocations for each frame of input audio. First bits are allocated for a first frequency band, and second bits are allocated for a second frequency band. The allocations are made on a frame-by-frame basis based on the energy ratio between the two bands. For each frame, the codec transform codes both frequency bands into two sets of transform coefficients, which are then packetized based on the bit allocations. The packets are then transmitted with the processing device. Additionally, the frequency regions of the transform coefficients can be arranged in order of importance determined by power levels and perceptual modeling. Should bit stripping occur, the decoder at a receiving device can produce audio of suitable quality given that bits have been allocated between the bands and the regions of transform coefficients have been ordered by importance.
摘要翻译：用于处理设备的可扩展音频编解码器确定每帧输入音频的第一和第二位分配。为第一频带分配第一比特，并且为第二频带分配第二比特。基于两个频带之间的能量比，逐帧地进行分配。对于每个帧，编解码转换将两个频带编码成两组变换系数，然后根据比特分配进行分组。然后与处理装置一起发送分组。此外，变换系数的频率区域可以按照由功率水平和感知建模确定的重要性的顺序排列。如果发生位剥离，则在接收设备处的解码器可以产生具有合适质量的音频，因为在带之间已经分配了位，并且已经按照重要性排列了变换系数的区域。

6. 发明授权

US08395653B2 Videoconferencing endpoint having multiple voice-tracking cameras 有权
标题翻译：具有多个语音跟踪摄像机的视频会议端点
公开(公告)号：US08395653B2
公开(公告)日：2013-03-12
申请号：US12782137
申请日：2010-05-18
申请人： Jinwei Feng , Peter Chu , Wayne Dunlap , Jonathan Gallmeier
发明人： Jinwei Feng , Peter Chu , Wayne Dunlap , Jonathan Gallmeier
IPC分类号： H04N7/15
CPC分类号： H04N7/15 , H04N7/142 , H04N7/147
摘要： A videoconferencing apparatus automatically tracks speakers in a room and dynamically switches between a controlled, people-view camera and a fixed, room-view camera. When no one is speaking, the apparatus shows the room view to the far-end. When there is a dominant speaker in the room, the apparatus directs the people-view camera at the dominant speaker and switches from the room-view camera to the people-view camera. When there is a new speaker in the room, the apparatus switches to the room-view camera first, directs the people-view camera at the new speaker, and then switches to the people-view camera directed at the new speaker. When there are two near-end speakers engaged in a conversation, the apparatus tracks and zooms-in the people-view camera so that both speakers are in view.
摘要翻译：视频会议设备自动跟踪房间中的扬声器，并在受控的人民摄像机和固定的室内摄像机之间动态切换。当没有人在说话的时候，设备会显示到远端的房间视图。当房间中有主导扬声器时，设备将人物摄像机引导到主扬声器，并从室内摄像机切换到人民摄像机。当房间里有一个新的扬声器时，设备首先切换到室内摄像机，将人物摄像机引导到新的扬声器，然后切换到指向新扬声器的人物摄像机。当有两个近端扬声器进行通话时，该设备将跟踪和放大人民摄像机，以便两个扬声器都在视野中。

7. 发明授权

US08170200B1 Method and apparatus for percussive noise reduction in a conference 有权
标题翻译：会议中冲击声降噪的方法和装置
公开(公告)号：US08170200B1
公开(公告)日：2012-05-01
申请号：US11684689
申请日：2007-03-12
申请人： Peter Chu , Jinwei Feng
发明人： Peter Chu , Jinwei Feng
IPC分类号： H04M9/08
CPC分类号： H04M9/082
摘要： A conferencing unit reduces or eliminates percussive noise in audio that it outputs to a far-end. The unit filters near-end audio into a plurality of bands and calculates instantaneous energies for each band. The energies in first and second ranges of the bands are summed, and a difference between the two sums is compared to a threshold value to determine whether speech is present in the near-end audio received. The first range is preferably a mid-band range of frequencies of 300 to 600-Hz, while the second range is preferably an outer-band range of 100-Hz to 300-Hz and 600-Hz to 14-kHz. Based on the determination, the conferencing unit adjusts an output level of the near-end audio to reduce or eliminate any percussive noise in output audio while there is not a substantial amount of speech in the near-end audio.
摘要翻译：会议单元减少或消除音频中的冲击噪声，从而将其输出到远端。该单元将近端音频滤波成多个频带并计算每个频带的瞬时能量。将频带的第一和第二范围的能量相加，并将两个和之间的差与阈值进行比较，以确定是否存在接收的近端音频中的语音。第一范围优选为300至600Hz的中频带范围，而第二范围优选为100Hz至300Hz和600Hz至14kHz的外频带范围。基于该确定，会议单元调整近端音频的输出电平以减少或消除输出音频中的任何冲击噪声，而近端音频中没有大量语音。

8. 发明授权

US09723260B2 Voice tracking camera with speaker identification 有权
公开(公告)号：US09723260B2
公开(公告)日：2017-08-01
申请号：US12782173
申请日：2010-05-18
申请人： Jinwei Feng
发明人： Jinwei Feng
IPC分类号： H04N7/14 , G06K9/00 , H04N5/232 , G10L17/00
CPC分类号： H04N7/142 , G06K9/00228 , G06K9/00892 , G10L17/00 , H04N5/232
摘要： A videoconferencing apparatus automatically tracks speakers in a room and dynamically switches between a controlled, people-view camera and a fixed, room-view camera. When no one is speaking, the apparatus shows the room view to the far-end. When there is a dominant speaker in the room, the apparatus directs the people-view camera at the dominant speaker and switches from the room-view camera to the people-view camera. When there is a new speaker in the room, the apparatus switches to the room-view camera first, directs the people-view camera at the new speaker, and then switches to the people-view camera directed at the new speaker. When there are two near-end speakers engaged in a conversation, the apparatus tracks and zooms-in the people-view camera so that both speakers are in view.

9. 发明申请

US20120290305A1 Scalable Audio in a Multi-Point Environment 有权
标题翻译：多点环境中的可扩展音频
公开(公告)号：US20120290305A1
公开(公告)日：2012-11-15
申请号：US13294471
申请日：2011-11-11
申请人： Jinwei Feng , Peter L. Chu , Stephen Botzko
发明人： Jinwei Feng , Peter L. Chu , Stephen Botzko
IPC分类号： G10L19/00
CPC分类号： G10L19/002 , G10L19/0212 , G10L19/24 , G10L25/18 , H04M3/568 , H04M7/0072
摘要： Use of a scalable audio codec to implement distributed mixing and/or sender bit rate regulation in a multipoint conference is disclosed. The scalable audio codec allows the audio signal from each endpoint to be split into one or more frequency bands and for the transform coefficients within such bands to be prioritized such that usable audio may be decoded from a subset of the entire signal. The subset may be created by omitting certain frequency bands and/or by omitting certain coefficients within the frequency bands. By providing various rules for each endpoint in a conference, the endpoint can determine the importance of its signal to the conference and can select an appropriate bit rate, thereby conserving bandwidth and/or processing power throughout the conference.
摘要翻译：公开了使用可扩展音频编解码器来实现多点会议中的分布式混合和/或发送器比特率调节。可扩展音频编解码器允许来自每个端点的音频信号被分成一个或多个频带，并且为了使这些频带内的变换系数被优先化，使得可以从整个信号的子集中解码可用的音频。可以通过省略某些频带和/或通过省略频带内的某些系数来创建该子集。通过为会议中的每个端点提供各种规则，端点可以确定其信号到会议的重要性，并且可以选择适当的比特率，从而节省整个会议的带宽和/或处理能力。

10. 发明授权

US08842161B2 Videoconferencing system having adjunct camera for auto-framing and tracking 有权
标题翻译：视频会议系统具有自动构图和跟踪的辅助摄像头
公开(公告)号：US08842161B2
公开(公告)日：2014-09-23
申请号：US13589380
申请日：2012-08-20
申请人： Jinwei Feng , Yibo Liu , Xiangdong Wang , Peter L. Chu
发明人： Jinwei Feng , Yibo Liu , Xiangdong Wang , Peter L. Chu
IPC分类号： H04N7/14
CPC分类号： H04N7/15 , H04N5/232 , H04N5/23219
摘要： A videoconference apparatus and method coordinates a stationary view obtained with a stationary camera to an adjustable view obtained with an adjustable camera. The stationary camera can be a web camera, while the adjustable camera can be a pan-tilt-zoom camera. As the stationary camera obtains video, faces of participants are detected, and a boundary in the view is determined to contain the detected faces. Absence and presences of motion associated with the detected face is used to verify whether a face is reliable. To then capture and output video of the participants for the videoconference, the view of the adjustable camera is adjusted to a framed view based on the determined boundary. In the end, active video captured in the framed view with the adjustable camera can be sent to a far-end for the videoconference.
摘要翻译：视频会议装置和方法将利用固定照相机获得的静止视图与利用可调节照相机获得的可调视图进行协调。固定式摄像机可以是网络摄像机，而可调摄像机可以是俯仰变焦摄像机。当固定照相机获得视频时，检测到参与者的面部，并且确定视图中的边界以包含检测到的面部。使用与检测到的脸部相关的运动的缺席和存在来验证脸部是否可靠。然后，为了视频会议捕获和输出与会者的视频，可调节摄像机的视图根据确定的边界被调整为框架视图。最后，使用可调节摄像头在框架视图中捕获的活动视频可以发送到视频会议的远端。

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