公开(公告)号：US20130106976A1

公开(公告)日：2013-05-02

申请号：US13282582

申请日：2011-10-27

Applicant: Peter L. Chu ,  Krishna Sai

Inventor： Peter L. Chu ,  Krishna Sai

IPC: H04N7/15

CPC classification number: H04N7/15 ,  H04L12/1827 ,  H04L65/1059 ,  H04L65/1069 ,  H04L65/403 ,  H04M3/002 ,  H04M3/567 ,  H04M2250/62 ,  H04N7/147 ,  H04N7/148

Abstract: A videoconferencing system has a videoconferencing unit that use portable devices as peripherals for the system. The portable devices obtain near-end audio and send the audio to the videoconferencing unit via a wireless connection. In turn, the videoconferencing unit sends the near-end audio from the loudest portable device along with near-end video to the far-end. The portable devices can control the videoconferencing unit and can initially establish the videoconference by connecting with the far-end and then transferring operations to the videoconferencing unit. To deal with acoustic coupling between the unit's loudspeaker and the portable device's microphone, the unit uses an echo canceller that is compensated for differences in the clocks used in the A/D and D/A converters of the loudspeaker and microphone.

Abstract translation: 视频会议系统具有视频会议单元，其使用便携式设备作为系统的外围设备。 便携式设备获得近端音频，并通过无线连接将音频发送到视频会议单元。 反过来，视频会议单元将最接近便携式设备的近端音频和近端视频一起发送到远端。 便携式设备可以控制视频会议单元，并且可以通过与远端连接然后将操作传送到视频会议单元来最初建立视频会议。 为了处理单元的扬声器和便携式设备的麦克风之间的声耦合，该单元使用回波消除器，其补偿扬声器和麦克风的A / D和D / A转换器中使用的时钟的差异。

公开(公告)号：US20130106975A1

公开(公告)日：2013-05-02

申请号：US13544271

申请日：2012-07-09

Applicant: Peter L. Chu ,  Yibo Liu ,  Zhemin Tu ,  Jonathan Gallmeier ,  Krishna Sai

Inventor： Peter L. Chu ,  Yibo Liu ,  Zhemin Tu ,  Jonathan Gallmeier ,  Krishna Sai

IPC: H04N7/14

CPC classification number: H04L12/1822 ,  H04L12/189 ,  H04M3/567 ,  H04M3/569 ,  H04N7/15

Abstract: A master device (e.g., a laptop) controls a videoconference connection with a far-end and acts as a controller for slave devices in a group. The master establishes the connection with the far-end using a wide area network and connects with the slaves using a Wi-Fi connection of a local area connection. To connect to the slaves, the master outputs an ultrasonic beacon encoding the master's address in the local network. The beacon also allows differences in the various clocks to be handled during audio processing. During the videoconference, the master outputs far-end audio to a loudspeaker and sends the far-end video to its display and to the slaves. Each device captures audio/video with its microphone and camera. The master determines which captured audio is a dominant talker's and may only send that audio to the far-end. The video associated with the dominant talker's device may also be sent to the far-end.

Abstract translation: 主设备（例如，笔记本电脑）控制与远端的视频会议连接，并且用作组中的从设备的控制器。 主机使用广域网建立与远端的连接，并使用局域网连接的Wi-Fi连接与从站进行连接。 要连接到从站，主站输出编码本地网络主站地址的超声波信标。 信标还允许在音频处理期间处理各种时钟的差异。 在视频会议期间，主机将远端音频输出到扬声器，并将远端视频发送到其显示器和从站。 每个设备用麦克风和相机捕获音频/视频。 主人确定哪个捕获的音频是主要的说话者，并且只能将该音频发送到远端。 与主要讲话者的设备相关的视频也可能被发送到远端。

公开(公告)号：US08428234B2

公开(公告)日：2013-04-23

申请号：US12465566

申请日：2009-05-13

Applicant: Eran Knaz

Inventor： Eran Knaz

IPC: H04M3/42

CPC classification number: H04W4/16 ,  H04M3/56 ,  H04M7/0063 ,  H04M2203/5009 ,  H04M2207/18 ,  H04N7/147 ,  H04N7/15

Abstract: A conferencing system for an enterprise is disclosed. The conferencing system includes a management apparatus for managing conferencing resources in a premises. The management apparatus includes a communications link for communicating with a proximity announcing system, which indicates whether a portable communications device is near a conferencing device within the premises. The management apparatus can transmit a message to a proximate portable communication device indicating that a conferencing device is nearby. The proximity announcing system can include wireless transmitters and receivers associated with the premises and with portable communication devices used within the premises for tracking the location of the portable communication devices throughout the premises.

Abstract translation: 披露了企业会议系统。 该会议系统包括用于管理房屋中的会议资源的管理装置。 管理装置包括用于与接近通知系统进行通信的通信链路，其指示便携式通信设备是否在建筑物内的会议设备附近。 管理装置可以向附近的便携式通信装置发送指示会议装置在附近的消息。 接近通知系统可以包括与房屋相关联的无线发射器和接收器以及在房屋内使用的便携式通信设备，用于跟踪整个房屋内的便携式通信设备的位置。

公开(公告)号：US08386266B2

公开(公告)日：2013-02-26

申请号：US12829233

申请日：2010-07-01

Applicant: Jinwei Feng ,  Peter Chu

Inventor： Jinwei Feng ,  Peter Chu

IPC: G10L19/00

CPC classification number: G10L19/002 ,  G10L19/0212 ,  G10L19/24 ,  G10L25/18

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US08358791B2

公开(公告)日：2013-01-22

申请号：US12136671

申请日：2008-06-10

Applicant: James Steven Joiner ,  Michael August Pocino ,  Scott David Orangio

Inventor： James Steven Joiner ,  Michael August Pocino ,  Scott David Orangio

IPC: H04B1/00

CPC classification number: H04M3/56 ,  H04L12/1827

Abstract: A distributed audio signal processing system having a plurality of linked audio signal processing units is disclosed. Each audio signal processing unit has physical channels for receiving and sending local audio signals and a high bandwidth interface for exchanging audio signals with other linked audio signal processing units. Each of the physical channels of each of the audio signal processing units is mapped to a corresponding global channel. Global channels can be combined to form virtual channels that can be processed as a signal channel. Combinations of virtual channels can be grouped into logical channel groups that can be controlled as a group.

Abstract translation: 公开了具有多个链接的音频信号处理单元的分布式音频信号处理系统。 每个音频信号处理单元具有用于接收和发送本地音频信号的物理信道和用于与其他链接的音频信号处理单元交换音频信号的高带宽接口。 每个音频信号处理单元的每个物理信道被映射到对应的全局信道。 全局通道可以组合形成可以作为信号通道处理的虚拟通道。 虚拟通道的组合可以分组成可以作为一组进行控制的逻辑通道组。

公开(公告)号：US08320554B1

公开(公告)日：2012-11-27

申请号：US12907224

申请日：2010-10-19

Applicant: Peter L. Chu

Inventor： Peter L. Chu

IPC: H04M9/08

CPC classification number: H04M9/082

Abstract: A conferencing endpoint uses acoustic echo cancellation with clock compensation. Receiving far-end audio to be output by a local loudspeaker, the endpoint performs acoustic echo cancellation so that the near-end audio capture by a microphone will lack echo of the far-end audio output from the loudspeaker. The converters for the local microphone and loudspeaker may have different clocks so that their sample rates differ. To assist the echo cancellation, the endpoint uses a clock compensator that cross-correlates an echo estimate of the far-end audio and the near-end audio and adjusts a sample rate conversion factor to be used for the far-end audio analyzed for echo cancellation.

Abstract translation: 会议端点使用具有时钟补偿的声学回波消除。 接收远端音频由本地扬声器输出，端点执行声学回声消除，使得麦克风的近端音频捕获将缺少来自扬声器的远端音频输出的回波。 用于本地麦克风和扬声器的转换器可能具有不同的时钟，使得它们的采样率不同。 为了帮助回声消除，端点使用时钟补偿器，将远端音频和近端音频的回波估计相互关联，并调整采样率转换因子以用于分析回波的远端音频 消除。

公开(公告)号：US20120290305A1

公开(公告)日：2012-11-15

申请号：US13294471

申请日：2011-11-11

Applicant: Jinwei Feng ,  Peter L. Chu ,  Stephen Botzko

Inventor： Jinwei Feng ,  Peter L. Chu ,  Stephen Botzko

IPC: G10L19/00

CPC classification number: G10L19/002 ,  G10L19/0212 ,  G10L19/24 ,  G10L25/18 ,  H04M3/568 ,  H04M7/0072

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US08289371B2

公开(公告)日：2012-10-16

申请号：US11751558

申请日：2007-05-21

Applicant: Niv Wagner ,  Zigi Gavish

Inventor： Niv Wagner ,  Zigi Gavish

IPC: H04N7/14

CPC classification number: H04N7/152

Abstract: Systems and methods are disclosed for controlling cropping areas of video images to match the allocated area associated with the image in a video conferencing layout. The disclosed methods can protect regions of interest from being cropped. A region of interest within a video image is identified to adjust the cropping in such a way that the region of interest is preserved within the cropped image. The region of interest may be identified based on motion detection or flesh tone detection, for example.

Abstract translation: 公开了用于控制视频图像的裁剪区域以匹配在视频会议布局中与图像相关联的分配区域的系统和方法。 所公开的方法可以保护感兴趣的区域被裁剪。 识别视频图像内的感兴趣区域以调整裁剪，使得感兴趣区域保留在裁剪图像内。 可以基于运动检测或肉色检测来识别感兴趣区域。

公开(公告)号：US20120233155A1

公开(公告)日：2012-09-13

申请号：US13417561

申请日：2012-03-12

Applicant: Jonathan Gallmeier ,  Krishna Sai ,  Michael Tucker ,  Ed Brakus

Inventor： Jonathan Gallmeier ,  Krishna Sai ,  Michael Tucker ,  Ed Brakus

IPC: G06F17/30

CPC classification number: H04N7/155 ,  G06F16/438 ,  G06F16/685 ,  G06F16/7844 ,  H04L12/1827 ,  H04L65/4015 ,  H04L65/403

Abstract: Systems and methods are disclosed to identify and generate keyword searches in real-time or near real-time for active participants in an on-going Audio, Video and Data Collaboration meeting (also referred to as “Unified Communications and Collaboration” or UCC). In one embodiment, multiple input sources are screened to detect text data and generate search strings from the deciphered keywords. Keywords are deciphered from presentation materials and other forms of data input to a UCC (e.g., documents, video, and audio). Keywords and generated search strings can then be presented to one or more participants for selection (e.g., hyperlink) to retrieve and present supporting material relative to a topic of discussion or point of interest in the UCC. Alternatively, recorded content can be search during or prior to playback to allow incorporation of disclosed embodiments and concepts.

Abstract translation: 公开了系统和方法，以便在正在进行的音频，视频和数据协作会议（也称为“统一通信和协作”或UCC）中为实时参与者实时或接近实时地识别和生成关键词搜索。 在一个实施例中，屏蔽多个输入源以检测文本数据并从解密的关键字生成搜索串。 关键字从演示材料和其他形式的数据输入到UCC（例如，文档，视频和音频）被解密。 然后可以将关键字和生成的搜索字符串呈现给一个或多个参与者以进行选择（例如，超链接）以相对于UCC中的讨论主题或兴趣点来检索和呈现支持材料。 或者，记录的内容可以在播放期间或之前进行搜索以允许所公开的实施例和概念的结合。

公开(公告)号：US20120206563A1

公开(公告)日：2012-08-16

申请号：US13449756

申请日：2012-04-18

Applicant: Erez Harel ,  Anat Bzoza

Inventor： Erez Harel ,  Anat Bzoza

IPC: H04N7/15

CPC classification number: H04N7/152 ,  H04N19/115 ,  H04N19/179 ,  H04N19/40 ,  H04N19/436 ,  H04N19/48 ,  H04N19/513 ,  H04N19/86

Abstract: The present application discloses a method and apparatus for a multipoint video conferencing system that can offer a wide variety of layouts and the ability to support a large number of conferees. A received stream of NALs from a plurality of endpoints can be processed by an exemplary NAL Processor Module (NPM) and be arranged into a stream of NALs that are referred to in this disclosure as organized NALs (ONALs). Two or more streams of compressed video organized into ONALs can be received by an exemplary NAL Editor Module (NEM), wherein each stream was created from a video image that was generated at an endpoint participating in the conference. An exemplary NEM can comprise a compressed composed frame memory (CCFM) module. Each CCFM can be divided into segments according to the layout of the continuous presence (CP) image that is to be displayed by one or more receiving endpoints.

Abstract translation: 本申请公开了一种用于多点视频会议系统的方法和装置，其可以提供各种布局和支持大量与会者的能力。 来自多个端点的接收的NAL流可以由示例性NAL处理器模块（NPM）处理，并且被布置成在本公开中被称为有组织的NAL（ONAL）的NAL流。 通过示例性NAL编辑器模块（NEM）可以接收组织成ONAL的两个或多个压缩视频流，其中每个流是从在参与会议的端点处生成的视频图像创建的。 示例性NEM可以包括压缩组合帧存储器（CCFM）模块。 每个CCFM可以根据要由一个或多个接收端点显示的连续存在（CP）图像的布局被划分成段。