WO2007140668A1 - procédé et appareil pour réaliser une surveillance à distance dans un système de téléconférence - Google Patents
procédé et appareil pour réaliser une surveillance à distance dans un système de téléconférence Download PDFInfo
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- WO2007140668A1 WO2007140668A1 PCT/CN2006/003649 CN2006003649W WO2007140668A1 WO 2007140668 A1 WO2007140668 A1 WO 2007140668A1 CN 2006003649 W CN2006003649 W CN 2006003649W WO 2007140668 A1 WO2007140668 A1 WO 2007140668A1
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- control unit
- terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/15—Conference systems
- H04N7/152—Multipoint control units therefor
Definitions
- the present invention relates to the field of conference television systems, and in particular, to a remote monitoring method and apparatus capable of controlling a monitored terminal in a conference television system.
- Two conference TV terminals point-to-point communication, which can be far away from each other's cameras.
- a plurality of conference television terminals participate in a multipoint conference on the MCU (Multipoint Control Unit, "MCU"), and there is a remote token in the entire conference; the terminal having the remote token can be The terminal it sees is remotely controlled, and can also be remotely controlled by its video source terminal. Other terminals cannot perform remote control.
- MCU Multipoint Control Unit
- one terminal can only see one remote image sent by the MCU at the same time in the conference. Even if there are dual streams and multiple pictures, it is limited to the codec capability of the MCU. The number of terminal sites that can be seen on the terminal is also limited.
- the technical problem to be solved by the present invention is to provide a method and device for realizing remote monitoring in a conference television system, which can solve the problem that the multipoint conference in the traditional conference television system can only achieve end-to-end distance, and the number of monitoring sites on the terminal is limited.
- the present invention provides a method for implementing remote monitoring in a conference television system, including:
- Step 1 selecting a monitored terminal that needs to display a screen on the multi-point control unit console, and the multi-point control unit console sends the display command information to the multi-point control unit;
- Step 2 The multi-point control unit communicates with the monitored terminal, and sends the digital media stream of the monitored terminal to the multi-point control unit console in a manner of independent video or multi-channel video mixing;
- Step 3 The multi-point control After the unit console is decoded, the monitored terminal screen is presented in a separate video combination or a multi-channel video mixing manner.
- the multi-point control unit communicates with the monitored terminal by using one of three protocols: H320 protocol, H323 protocol, and SIP protocol.
- the above method may further have the following features: In the step 3, after the multi-point control unit console decodes, the video is displayed using a web page.
- the multi-point control unit console performs remote control on the monitored terminal, including:
- Step A the multi-point control unit console sends a remote command of the corresponding terminal of the monitored screen to the multi-point control unit;
- Step B The multipoint control unit forwards the remote command to the corresponding terminal.
- Step C 'The corresponding terminal performs corresponding control on the terminal camera according to the remote command.
- the multipoint control unit forwards the remote command to the corresponding terminal in one of two ways:
- the multipoint control unit and the terminal use a data channel carrying remote telemetry signaling, and the multipoint control unit sends the remote camera control code to the terminal on the data channel;
- the multi-point control unit sends a remote command to the terminal by using a control message through the control channel for interactive signaling, and the terminal parses and executes the control message after receiving the control message.
- the data channel uses a low speed data channel, a high speed data channel, or a multi-layer protocol channel.
- the present invention further provides an apparatus for implementing remote monitoring in a conference television system, comprising: a multipoint control unit console, a multipoint control unit, and a plurality of monitored terminals; and the multipoint control unit controls The station is connected to the multipoint control unit for selecting the monitored terminal on which the display screen is to be displayed, transmitting the display command information to the multipoint control unit, and transmitting the independent video of the monitored terminal sent back by the multipoint control unit Or after multi-channel video decoding, it is displayed;
- the multi-point control unit communicates with the monitored terminal, and sends the digital media stream of the monitored terminal to the multi-point control unit console in a manner of independent video or multi-channel video mixing;
- the monitored terminal is configured to record an analog video in real time through a terminal camera, and after receiving the recorded analog video, convert the analog video into a digital media stream and transmit the data to a multipoint control unit.
- the foregoing apparatus may further have the following features: the multipoint control unit console is further configured to send a remote command of the monitored screen corresponding terminal to the multipoint control unit; the multipoint control unit is further configured to: Forwarding the remote command to the corresponding terminal; the corresponding terminal is further configured to perform corresponding control on the terminal camera according to the remote command.
- the multipoint control unit and the terminal use a data channel carrying remote telemetry signaling, and the multipoint control unit transmits a remote camera control code to the terminal on the data channel.
- the foregoing apparatus may further have the following feature: the multipoint control unit sends a remote command to the terminal by using a control message through the control channel for the interactive signaling; the terminal parses and executes the received control message.
- the method and device of the present invention can remotely monitor multiple terminal sites in real time on the MCU console, and can perform FECC control on the monitored terminals in real time, especially for large conference television systems such as military and armed police.
- FIG. 1 is a structural diagram of a networking of an embodiment of the present invention
- 3 180600151. 2 is a flow chart of a conference television system MCU transmitting a media stream of a monitored terminal to an MCU console according to an embodiment of the present invention
- FIG. 3 is a flow chart of the conference television system remotely monitoring the terminal on the MCU console in the embodiment of the present invention.
- the MCU console is externally connected to the TV, and receives the multi-channel analog image uploaded by the MCU, and is directly displayed without decoding, and the decoding point is on the MCU.
- the MCU is received on the computer where the MCU console is located.
- the uploaded digital image is displayed on the WEB page after decoding, and the decoding point is on the MCU console.
- the embodiment of the present invention is different from the remote control point of the prior art, and the prior art is implemented on the conference television terminal; the present invention is implemented on the MCU console.
- the prior art uses a far-away token, in essence, only the terminal that has obtained the token can be far away, and can only be far away from the terminal that it sees; the embodiment of the present invention does not have this limitation, as long as it can be viewed on the MCU console. To the image of several terminal sites, remote control of the corresponding terminal sites can be performed separately. '
- the far-distance channel between the MCU and the terminal can be used to carry the data channel for remote signaling as well as the control channel for interactive signaling, but the remote command should be sent through the non-standard control message encapsulation. .
- FIG. 1 depicts a simple network diagram of a conference television system.
- the conference television system in the figure is composed of an MCU console 101, an MCU 102 and a plurality of conference television terminals 103, 104.
- the MCU console 101 is connected to the MCU 102 for selecting a monitored terminal on which a display screen is to be displayed, and the display command is displayed.
- the information is sent to the MCU 102, and the independent video or multi-channel video of the conference television terminals 103, 104 sent back by the MCU 102 is decoded, and displayed; after receiving the command from the MUC console 101, the MCU 102 selects The terminals 103, 104 communicate, and the digital media streams of the terminals 103, 104 are sent to the multipoint control unit console in a separate video or multi-channel video; the terminals 103, 104 are used to pass the terminal camera (not shown) Show) 'Real-time recording
- the analog video is converted and converted to a digital media stream for transmission to the MCU 102.
- the VICU console 101 is further configured to deliver a remote command of the monitored screen corresponding terminal to the MCU 102; the 102 is further configured to forward the remote command to the corresponding terminal 103, 104; The corresponding terminals 103 and 104 are further configured to perform corresponding control on the terminal camera (not shown) according to the remote command.
- the protocols for communication between the MCU 102 and the conference television terminals 103 and 104 include, but are not limited to, H320 (Narrow-band visual telephone systems and terminal equipment), H323 (Packet-based multimedia communications system), and SIP (Session Initiation Protocol). .
- FIG. 2 is a flow chart of the MCU of the conference television system transmitting the monitored terminal media stream to the MCU console according to the present invention.
- the main process includes the following steps:
- Step 201 Select a monitored terminal on the MCU console of the conference television system, and notify the MCU;
- Step 202 The MCU communicates with the monitored terminal, and sends the media stream of the monitored terminal to the MCU console in an independent video or multi-channel video mixing manner;
- Step 203 The MCU controls the station to display the monitored terminal screen in an independent video combination or a multi-channel video mixing manner, which may be displayed on the interface.
- Fig. 3 is a flow chart showing the remote control of the conference television system on the MCU console of the present invention.
- the main process includes the following steps:
- Step 301 Select a monitored screen on the MCU console, and send the remote command to the MCU corresponding to the final dock;
- Step 302 After receiving the remote command sent by the MCU console, the MCU forwards the remote command to the corresponding terminal.
- the MCU sends a remote command to the terminal in one of two ways:
- the MCU and the terminal open a data channel carrying the remote signaling, and the data channel may be an LSD (Low-Speed Data) channel or an HSD (High-Speed Data) channel.
- LSD Low-Speed Data
- HSD High-Speed Data
- MLP Multilayer Protocol
- the conference TV terminal can be far away, and it is more general.
- Mode 2 The MCU sends a remote command to the terminal through a customized non-standard control message, and the terminal parses and executes after receiving the message. In this way, the terminal and the MCU need to negotiate non-standard far-reaching messages, which can only be used for the terminal of the manufacturer.
- the remote data is carried by the H245 non-standard message, and the terminal is required to be identified and parsed.
- Customize a remote data identifier such as "1 3 6 1 4 1 3902 3002 ", with telemetry data, using the command.nonStandard.nonStandardData.data field 7 .
- NonStandardMessage :: -SEQUENCE
- NonStandardldentifier : -CHOICE
- Step 303 After receiving the remote command, the terminal performs corresponding control on the terminal camera, such as the camera up, down, left, and right, zoom "-", zoom "+”, aperture “+”, aperture”- " Wait.
- the method and device of the present invention can remotely monitor multiple terminal sites in real time on the MCU console, and can perform FECC control on the monitored terminals in real time, which is very useful for large-scale conference television systems such as military and armed police. .
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- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
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Description
一种在会议电视系统中实现远程监控的方法和装置
技术领域
本发明涉及会议电视系统领域, 特别是涉及一种在会议电视系统中能对 被监控终端进行控制的远程监控方法和装置。
背景技术
现有会议电视系统中, 实现远程监控都是通过端到端的方式实现的。根 据通讯实体个数分为两种基本形式:
1、 两个会议电视终端点到点通讯, 可以互相远遥对方的摄像头。
2、多个会议电视终端参加 MCU(多点控制单元, Multipoint Control Unit, 筒称" MCU" )上的多点会议, 整个会议中有一个远遥令牌; 拥有远遥令牌的 终端可以对它所看的终端进行远端遥控,也可以被它的视频源终端遥控, 其 他终端则不能进行远遥控制。
这两种方式的远遥实际上都是一个终端只能远遥另一个终端,不能同时 远遥其他终端。
同时,会议中同一时刻一个终端只能看到 MCU送过来的一路远端图像, 即使有双流、 多画面, 但限于 MCU的编解码能力, 在终端上能看到的终端 会场数目也是有限的。
在军队、 武警会议电视系统中, 常常有这样的需求: 需要在 MCU控制 台上能监控多路终端图像, 并能对被监控终端进行 FECC (远端摄像机掠制, Far End Camera Control , 简称" FECC" )控制。 发明内容
本发明所要解决的技术问题是提供一种在会议电视系统中实现远程监 控的方法和装置, 解决传统的会议电视系统中多点会议只能实现端到端远 遥, 而且终端上监控会场数目有限的问题。 .
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为了解决上迷问题,本发明提供了一种在会议电视系统中实现远程监控 的方法, 包括:
步骤一,在多点控制单元控制台上选取需要显示画面的被监控终端, 多 点控制单元控制台将该显示命令信息发送给多点控制单元;
步骤二,多点控制单元与被监控终端进行通讯,并将被监控终端的数字 媒体流以独立视频或者多路视频混合的方式发往多点控制单元控制台; 步骤三,所述多点控制单元控制台解码后,以独立视频组合或者多路视 频混合方式呈现被监控终端画面。
进一步地, 上述方法还可具有以下特点: 在所述步骤一中, 多点控制单 元与被监控终端采用 H320协议、 H323协议、 SIP协议三种协议之一进行通 讯
进一步地, 上述方法还可具有以下特点: 在所述步骤三中, 所述多点控 制单元控制台解码后, 使用 Web页面显示视频。
进一步地,上述方法还可具有以下特点: 所述多点控制单元控制台对被 监控终端进行远遥, 包括:
步骤 A,所迷多点控制单元控制台向所述多点控制单元下发被监控画面 对应终端的远遥命令;
步骤 B, 所述多点控制单元向所述对应终端转发所述远遥命令; 步骤 C, '所述对应终端根据所述远遥命令对终端摄像头进行相应的控 制。
进一步地, 上述方法还可具有以下特点: 在所述步驟 B 中, 所述多点 控制单元通过以下两种方式之一向所述对应终端转发所述远遥命令:
方式一,在多点控制单元和对应终端交互过程中,多点控制单元和终端 使用承载远遥信令的数据信道,多点控制单元在该数据信道上向终端发送远 端摄像机控制码;
方式二,多点控制单元通过交互信令用的控制信道,使用控制消息向终 端发送远遥命令,.终端收到所述控制消息后解析执行。
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W 进一步地, 上述方法还可具有以下特点: 方式一中, 所述数据信道采用 低速数据信道、 高速数据信道或多层协议信道。
为了解决上述问题,本发明还提供了一种在会议电视系统中实现远程监 控的装置, 包括: 多点控制单元控制台、 多点控制单元和多个被监控终端; 所述多点控制单元控制台连接多点控制单元,用于在其上选取需要显示 画面的被监控终端, 将该显示命令信息发送给多点控制单元, 并将所述多点 控制单元发送回来的被监控终端的独立视频或者多路视频解码后, 显示出 来;
所述多点控制单元与被监控终端进行通讯,并将被监控终端的数字媒体 流以独立视频或者多路视频混合的方式发往多点控制单元控制台;
所述被监控终端用于通过终端摄像头实时录制模拟视频,并在收到录制 的模拟视频后, 将该模拟视频转换成数字媒体流, 传送给多点控制单元。
进一步地,上述装置还可具有以下特点: 所述多点控制单元控制台还用 于向所述多点控制单元下发被监控画面对应终端的远遥命令;所述多点控制 单元还用于向所述对应终端转发所迷远遥命令;所述对应终端还用于根据所 述远遥命令对终端摄像头进行相应的控制。
进一步地,上述装置还可具有以下特点: 所述多点控制单元和终端使用 承载远遥信令的数据信道,多点控制单元在该数据信道上向终端发送远端摄 像机控制码。
进一步地,上述装置还可具有以下特点: 所述多点控制单元通过交互信 令用的控制信道,使用控制消息向终端发送远遥命令; 所述终端对收到所述 控制消息解析并执行。 釆用本发明所述方法和装置 ,在 MCU控制台上就能够实时远程监控多 个终端会场, 并能对被监控终端实时地进行 FECC控制, 特別对军队、 武警 等大型会议电视系统非常有用。
附图概述 图 1是本发明实施例的組网结构图;
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图 2是本发明实施例中会议电视系统 MCU向 MCU控制台发送被监控 终端媒体流的流程图;
图 3是本发明实施例中会议电视系统在 MCU控制台上远遥楝监控终端 的流程图。 本发明的较佳实施方式
在现有技术中, MCU控制台外接电视, 接收 MCU上传的多路模拟图 像, 不用解码直接显示出来, 解码点在 MCU上; 本发明实施例中, 在 MCU 控制台所在的电脑上, 接收 MCU上传的数字图像, 解码后在 WEB页面显 示, 解码点在 MCU控制台上。
本发明实施例与现有技术的远遥控制点不同,现有技术是在会议电视终 端上操作实现; 本发明在 MCU控制台上操作实现。
现有技术使用了远遥令牌, 实质是只有取得了令牌的终端才能远遥, 并 且只能远遥自己看到的终端; 本发明实施例没有这个限制, 只要在 MCU控 制台上能观看到几个终端会场的图像,就能分别对观看到的相应的终端会场 进行远遥控制。'
MCU和终端之间的远遥通道, 可以和现有发明的一样采用承载远遥信 令的数据信道, 也可以用交互信令用的控制信道,但远遥命令要通过非标控 制消息封装发送。
下面结合附图及实施例对本发明的技术方案做进一步说明。 .
图 1描述的是一个简单的会议电视系统组网图。图例中会议电视系统由 MCU控制台 101、 MCU 102和多个会议电视终端 103、 104组成, MCU控 制台 101连接 MCU 102, 用于在其上选取需要显示画面的被监控终端, 将 该显示命令信息发送给 MCU 102, 并将 MCU 102发送回来的会议电视终端 103、 104的独立视频或者多路视频解码后, 显示出来; 所述 MCU 102在收 到 MUC控制台 101显示命令后, 与选定的终端 103、 104进行通讯, 并将 终端 103、 104的数字媒体流以独立视频或者多路视频混合的方式发往多点 控制单元控制台; 终端 103、 104用于通过终端摄像头 (图中未示) '实时录
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制模拟视频, 并将该模拟视频转换成数字媒体流, 传送给 MCU 102。
所述] VICU控制台 101还用于向所述 MCU 102下发被监控画面对应终 端的远遥命令; 所述] 102还用于向所述对应终端 103、 104转发所述远 遥命令;所述对应终端 103、 104还用于根据所述远遥命令对终端摄像头(图 中未示)进行相应的控制。
MCU 102和会议电视终端 103、 104通讯用的协议包括但不限于 H320 ( Narrow-band visual telephone systems and terminal equipment ) 、 H323 ( Packet-based multimedia communications system ) 、 SIP ( Session Initiation Protocol, 会话初始化协议) 。
图 2是本发明中会议电视系统 MCU向 MCU控制台发送被监控终端媒 体流的流程图。 主要流程包括如下步骤:
步骤 201、 在会议电视系统的 MCU控制台上选取被监控终端, 并通知 MCU; ·
步骤 202、 MCU与被监控终端通讯, 将被监控终端的媒体流以独立视 频或者多路视频混合方式发往 MCU控制台;
.步骤 203、 MCU控制.台解码后以独立视频组合或者多路视频混合方式 呈现被监控终端画面, 可以是在界面显示。
图 3是本发明中会议电视系统在 MCU控制台上远遥 ¾控终端的流程 图。 主要流程包括如下步骤:
步骤 301、.在 MCU控制台上选择被监控画面, 向 MCU下发此画面对 应终塢的远遥命令;. .
步骤 302、 MCU收到 MCU控制台下发的远遥命令后 , 向对应终端转发 远遥命令;
MCU向终端发送远遥命令, 可采用以下两种方式之一:
方式 1,在 MCU和终端上端交互过程中, MCU和终端打开承载远遥信 令的数据信道, 数据信道可以是 LSD ( Low-Speed Data低速数据)信道、 HSD ( High-Speed Data高速数据 )信道、 MLP ( Multilayer Protocol多层协 议)信道, MCU在数据信道上向终端发送 FECC码。 此种方式对各个厂家
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的会议电视终端都能远遥, .比较通用。
方式 2, MCU通过自定义的非标控制消息向终端发送远遥命令, 终端 收到后解析执行。 此种方式需要终端与 MCU共同协商非标远遥消息, 一般 只能针对本厂家终端。
在本实施例的一个应用实例中, 在 H245控制信道上, 用 H245非标消 息承载远遥数据, 要求终端能够识别、 解析。
自定义一个远遥数据标识, 例如" 1 3 6 1 4 1 3902 3002 " , 用 遥数据, 用 command.nonStandard.nonStandardData.data字段 7 载。
H245协议相应部分内容参考:
CommandMessage :;=CHOICE
{
nonstandard NonStandardMessage,
}
NonStandardMessage :: -SEQUENCE
{
nonStandardData NonStandardParameter,
} .
NonStandardParameter ::=SEQUENCE
{
nonStandardldentifier NonStandardldentifier,
data OCTET STRING
}
NonStandardldentifier :: -CHOICE
{
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object OBJECT IDENTIFIER.
h221NonStandard SEQUENCE
{
t35CountryCode INTEGER (0..255), -- country, per T.35 Annex A
t35Extension INTEGER (0..255),
― assigned nationally unless t35ConntryCode is binary
- 1111 1111, in which case it shall contain the country code
― according to T.35 Annex B
manufacturerCode INTEGER (0..65535) -- assigned nationally }
}
步驟 303、 终端收到远遥命令后, 对终端摄像头进行相应的控制, 比如 摄像头向上、 向下、 向左、 向右, 变焦 "-" 、 变焦 "+" , 光圈 "+" 、 光 圈 "-" 等。
以上所述仅为本发明的较佳实施例 , 并非用来限定本发明的实施范围; 凡是依本发明所作的等效变化与修改, 都被本发明的专利范围所涵盖。
工业实用性 采用本发明所述方法和装置, 在 MCU控制台上就能够实时远程监控多 个终端会场, 并能对被监控终端实时地进行 FECC控制, 对军队、 武警等大 型会议电视系统非常有用。
7 180600151.
Claims
1、 一种在会议电视系统中实现远程监控的方法, 其特征在于, 包括: 步骤一,在多点控制单元控制台上选取需要显示画面的被监控终端, 多 点控制单元控制台将该显示命令信息发送给多点控制单元;
步骤二, 多点控制单元与被监控终端进行通讯, 并将被监控终端的数字 媒体流以独立视频或者多路视频混合的方式发往多点控制单元控制台;
步骤三, 所述多点控制单元控制台解码后, 以独立视频组合或者多路视 频混合方式呈现被监控终端画面。
2、 根据权利要求 1所述的方法, 其特征在于, 在所述步骤一中, 多点 控制单元与被监控终端采用 H320协议、 H323协议、 SIP协议三种协议之一 进行通讯。
3、 根据权利要求 1所述的方法, 其特征在于, 在所述步骤三中, 所述 多点控制单元控制台解码后, 使用 Web页面显示视频。
4、根据权利要求 1 ~ 3中任意一项所述的方法, 其特征在于, 所述多点 控制单元控制台对被监控终端进行远遥, 包括
步骤 A,所述多点控制单元控制台向所述多点控制单元下发被监控画面 对应终端的远遥命令;
步骤 B, 所述多点控制单元向所述对应终端转发所述远遥命令; 步骤 (:, 所述对应终端根据所述远遥命令对终端摄像头进行相应的控 制。
5、 根据权利要求 4所述的方法, 其特征在于, 在所述步骤 B中, 所述 多点控制单元通过以下两种方式之一向所述对应终端转发所述远遥命令: 方式一,在多点控制单元和对应终端交互过程中, 多点控制单元和终端 使用承载远遥信令的数据信道,多点控制单元在该数据信道上向终端发送远 端摄 ^^控制码;
方式二, 多点控制单元通过交互信令用的控制信道, 使用控制消息向终 端发送远遥命令, 终端收到所述控制消息后解析执行。
8 180600151.
6、 根据权利要求 5所述的方法, 其特征在于, 方式一中, 所述数据信 道采用低速数据信道、 高速数据信道或多层协议信道。
7、 一种在会议电视系统中实现远程监控的装置, 其特征在于, 包括: 多点控制单元控制台、 多点控制单元和多个被监控终端;
所述多点控制单元控制台连接多点控制单元,用于在其上选取需要显示 画面的被监控终端,将该显示命令信息发送给多点控制单元, 并将所述多点 控制单元发送回来的被监控终端的独立视频或者多路视频解码后, 显示出 来;
所述多点控制单元与被监控终端进行通讯,并将被监控终端的数字媒体 流以独立视频或者多路视频混合的方式发 4主多点控制单元控制台;
所述被监控终端用于通过终端摄像头实时录制模 视频,并在收到录制 的模拟视频后, 将该模拟视频转换成数字媒体流, 传送给多.点控制单元。
8、 根据权利要求 7所述的装置, 其特征在于, 所述多点控制单元控制 台还用于向所述多点控制单元下发被监控画面对应终端的远遥命令;所述多 点控制单元还用于向所述对应终端转发所述远遥命令;所述对应终端还用于 根据所述远遥命令对终端摄像头进行相应的控制。
9、 根据权利要求 8所述的装置, 其特征在于, 所述多点控制单元和终 端使用承载远遥信令的数据信道,多点控制单元 该数据信道上向终端发送 远端摄像机控制码。
10、根据权利要求 8所述的装置, 其特征在于, 所述多点控制单元通过 交互信令用的控制信道,使用控制消息向终端发送远遥命令; 所述终端对收 到所述控制消息解析并执行。
9 180600151.
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| CN200610012158A CN101087398B (zh) | 2006-06-08 | 2006-06-08 | 一种在会议电视系统中实现远程监控的方法和装置 |
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| CN101888523A (zh) * | 2010-06-30 | 2010-11-17 | 华为终端有限公司 | 会议控制方法和系统 |
| CN102377979B (zh) * | 2010-08-11 | 2014-02-05 | 杭州华三通信技术有限公司 | 一种摄像机控制系统和控制方法 |
| CN102244764B (zh) * | 2011-06-28 | 2015-08-19 | 华为终端有限公司 | 状态转换控制方法、多点控制服务器和视讯会议系统 |
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| CN106331890A (zh) * | 2015-06-24 | 2017-01-11 | 中兴通讯股份有限公司 | 视频通讯图像的处理方法及装置 |
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