CN101340549B - Method and apparatus for controlling conference television terminal camera - Google Patents
Method and apparatus for controlling conference television terminal camera Download PDFInfo
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- CN101340549B CN101340549B CN2008101440840A CN200810144084A CN101340549B CN 101340549 B CN101340549 B CN 101340549B CN 2008101440840 A CN2008101440840 A CN 2008101440840A CN 200810144084 A CN200810144084 A CN 200810144084A CN 101340549 B CN101340549 B CN 101340549B
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Abstract
The invention provides a method used for controlling a conference television terminal camera, which leads at least a camera to be connected with external equipment by a serial port. The method also comprises the steps as follows: the subscriber sends camera control instruction messages encapsulated by the external equipment to the conference television terminal; the conference television terminal receives the camera control instruction message and analyses the messages so as to generate practical camera control commands; furthermore, the generated camera control commands are encapsulated and sent to the external equipment; the external equipment extracts the camera control commands, drives and controls different cameras by the serial port. The invention also discloses a device which controls the conference television terminal camera, comprising the external equipment and the conference television terminal. The method and the device of the invention can control a plurality of cameras which use the same or different control protocols without transplanting the camera control module.
Description
Technical Field
The invention relates to a conference television terminal control technology, in particular to a method and a device for controlling a conference television terminal camera.
Background
At present, a video conference terminal uses a built-in or external serial port to connect a camera, and according to a standard or a proprietary camera control protocol provided by a manufacturer, the video conference terminal receives and transmits a camera control command through a serial port driver inside the video conference terminal, and after receiving the control command transmitted by the serial port driver, the camera executes a corresponding action through a processing mechanism inside the video conference terminal, so that the control of the camera is realized.
For the camera, the control commands comprise basic control commands such as rotation, positioning and zooming and other extended control commands, wherein the rotation comprises up rotation, down rotation, left rotation and right rotation; the positioning finger is turned to a specified position. Generally, cameras of different manufacturers or the same manufacturer and different models have different control protocols, and in order to control the cameras, a camera control module included in the video conference terminal must master different camera control protocols and send different control commands according to the different camera control protocols.
As shown in fig. 1, a video conference terminal currently includes the following parts: the system comprises a console, a main control module and a camera control module; the control console is an interface which is used for a user to operate outside the video conference terminal so as to control the camera; the main control module manages all the modules in the video conference terminal; and the camera control module is used for generating a control command which can be identified by an actual camera and realizing the camera control in the video conference terminal.
When the camera is connected to the video conference terminal, different cameras are connected to the video conference terminal through different serial ports on the video conference terminal, and interact with the camera control module. The control flow when the user controls the camera can be described as follows: firstly, a user sends a camera control instruction message on a console, and the console sends the camera control instruction message to a master control; then the master control sends a camera control instruction message to the camera control module; and then, generating a control command which can be identified by an actual camera by the camera control module, and respectively sending the control command to different cameras through different serial ports of the video conference terminal.
This traditional camera control approach has two major drawbacks:
one is that the control number of the cameras is limited. External serial ports which can be reserved on the video conference terminal are generally not more than two, and the control of more than two cameras is difficult to realize, particularly the control of more than two cameras with different models.
Another is that the control method of the camera is not flexible enough. The controller of the camera must be a video conference terminal with a camera control module, and if the camera is connected to other external equipment, such as a PC or other types of equipment which can be connected with the camera through a serial port but does not have the camera control module, the camera control module must be transplanted to control the corresponding camera.
In the prior art, a schematic diagram of module connection of a camera to an external device is shown in fig. 2, a camera control module is installed on the external device, and different cameras are connected to different serial ports of the external device. The control flow when the user controls the camera can be described as follows: firstly, a user sends a camera control instruction message on a console, and the console sends the camera control instruction message to a camera control module; then the camera control module generates an actual control command which can be identified by the camera and sends the control command to a serial port driving module on the external equipment; and then, the serial port driving module sends a control command to the camera through different serial ports on the external equipment.
Although the external device is connected with the cameras in the prior art, the control over the multiple cameras can be realized, the camera control module needs to be transplanted and installed on the external device, the camera control module is related to platforms such as an operating system of the external device, and when the camera control module is transplanted to the external device with different system platforms, the camera control module needs to be supported by different system platforms, so that the development difficulty of the camera control module is increased, and inconvenience is brought to the transplanting and installing of the camera control module on different external devices.
Disclosure of Invention
In view of the above, the main objective of the present invention is to provide a method and an apparatus for controlling a camera of a video conference terminal, which can control a plurality of cameras using the same or different control protocols without migrating a camera control module.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a method for controlling video conference terminal camera connects at least one camera to external device through serial port, the method also includes:
a. the user sends the encapsulated camera control instruction message to the conference television terminal through the external equipment;
b. the video conference terminal receives and analyzes the camera control instruction message, generates an actual camera control command, encapsulates the generated camera control command and then sends the encapsulated camera control command to the external equipment;
c. the external equipment extracts the camera control command and drives and controls different cameras through the serial ports of the external equipment.
The step a of encapsulating the camera control instruction message is finished by a console in the external equipment; correspondingly, the camera control command extracted in the step c is completed by a console in the external equipment.
In the above scheme, the video conference terminal includes a main control module and a camera control module, and step b specifically includes: the master control receives a camera control instruction message sent by the console, unpacks the camera control instruction message and sends the camera control instruction message to the camera control module; the camera control module analyzes the camera control instruction message, generates an actual camera control command, packages the generated camera control command and sends the camera control command to the master control, and the master control packages the camera control command and sends the camera control command to the console.
In the scheme, the console encapsulates the camera control instruction message into a socket format and sends the socket format to the master control in the step a; in the step b, the master control packages the camera control command into a socket format and sends the socket format to the console; and in the step b, the camera control module packages the camera control command into a message format which can be identified by the master control and sends the message format to the master control.
In the above scheme, the message format recognizable by the master control includes a message source, a message source component code, a message type, a message length, and a message content; the socket in step a or step b comprises a message head indication, a message length, a console ID, a control message, a message content and a message tail.
And b, the main control identifiable message packaged by the camera control module or the socket in the step a or the step b adopts a network byte sequence.
The invention also provides a device for controlling the camera of the video conference terminal, which comprises external equipment and the video conference terminal; wherein,
the external equipment is used for sending the encapsulated camera control instruction message to the video conference terminal, extracting the camera control instruction from the message which is sent by the external equipment from the video conference terminal and is formed by encapsulating the actual camera control instruction corresponding to the camera control instruction, and driving and controlling different cameras through self serial ports;
and the conference television terminal is used for receiving and analyzing the camera control instruction message, generating an actual camera control command, packaging the generated camera control command and then sending the packaged camera control command to the external equipment.
The external equipment further comprises a console and a serial port driving module; the control console is used for sending a camera control instruction message, packaging the camera control instruction message into a socket format and sending the socket format to the video conference terminal, and sending a camera control command sent by the video conference terminal to the serial port drive module; and the serial port driving module is used for sending the camera control command to the corresponding camera.
The conference television terminal further comprises a main control module and a camera control module; the main control is used for receiving a camera control instruction message sent by a console in the external equipment, then sending the camera control instruction message to the camera control module, packaging a camera control command sent by the camera control module into a socket format and sending the socket format to the console on the external equipment; the camera control module is used for analyzing the camera control instruction message, generating a camera control command, packaging the camera control command into a format which can be identified by the master control and sending the camera control command to the master control.
The method and the device for controlling the video conference terminal camera provided by the invention have the advantages that the plurality of cameras are connected to the main control system through the serial ports of the external equipment, the external equipment can be used for controlling the plurality of cameras using the same or different control protocols under the condition of not transplanting the camera control module due to the interaction between the main control system and the console through the socket, the expensive video conference terminal can be greatly saved in the occasion of needing the plurality of cameras to participate in the video conference, the camera control module does not need to be transplanted, and the use of a user and the development of technical personnel are facilitated.
Drawings
Fig. 1 is a schematic diagram illustrating a module connection of a camera to a video conference terminal in the prior art;
FIG. 2 is a schematic diagram of a module with a camera connected to an external device according to the prior art;
FIG. 3 is a schematic diagram of the structure of the device for controlling the camera of the video conference terminal according to the present invention;
fig. 4 is a specific flowchart for implementing camera control of the video conference terminal by using the composition structure of fig. 3.
Detailed Description
The basic idea of the method of the invention is as follows: a user sends a camera control instruction message after encapsulation through external equipment, and the camera control instruction message is sent to a conference television terminal in a socket format; the conference television terminal generates an actual control command which can be identified by the camera according to the camera control instruction message through unpacking and analyzing; packaging the generated camera control command into a socket and sending the socket to external equipment; and after the external equipment acquires the transmitted camera control command packaged as the socket, the camera control command is extracted, and the camera control command is transmitted to the corresponding camera through the serial port drive of the external equipment, so that the control of the corresponding camera is realized.
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 3 is a schematic structural diagram of the apparatus for controlling a camera of a video conference terminal according to the present invention, and as shown in fig. 3, the apparatus according to the present invention includes an external device and a video conference terminal; wherein,
the external equipment comprises a console and a serial port driving module; the control console is used for sending a camera control instruction message required by a user, packaging the camera control instruction message into a socket format and sending the socket format to the video conference terminal, and is also used for sending a camera control command sent by the video conference terminal to the serial port drive module; and the serial port driving module is used for sending the camera control command to the corresponding camera.
The conference television terminal comprises a main control module and a camera control module, wherein the main control module is used for receiving a camera control instruction message sent by a console in the external equipment and then sending the camera control instruction message to the camera control module, and is also used for packaging a camera control instruction sent by the camera control module into a socket format and sending the socket format to the console on the external equipment; the camera control module analyzes the camera control instruction message, generates a camera control command, packages the camera control command into a format which can be identified by the master control and sends the camera control command to the master control.
Correspondingly, the camera completes corresponding control operation according to a camera control command sent by the serial port driving module.
The serial port driving module of the external equipment comprises a physical serial port and a serial port driver on the external equipment, the camera is connected with the serial port of the external equipment through a serial port control line, and data interaction is realized through the serial port driver.
The external device can be a PC or other control terminals which can control the serial port and support a computer network protocol such as a TCP/IP protocol; the number of serial ports on an external device such as a PC can be expanded more by installing an expansion serial port card.
The camera control module is provided with a virtual control interface, and the control interface can generate an actual camera control command which can be identified by a camera according to a camera control instruction message sent by a main control; and then the master control sends the generated camera control command to the console in a socket form through a socket. Here, the socket is a socket (socket) used for network application programming.
Fig. 4 is a specific flowchart for controlling a camera of a video conference terminal by using the composition structure shown in fig. 3, and as shown in fig. 4, the method of the present invention includes the following steps:
step 401, a user operates a console to send a control instruction message to a camera.
Step 402, a console encapsulates a camera control instruction message sent by a user and information such as a serial port number corresponding to a camera to be controlled into a message which can be identified by a master control, namely, the message is encapsulated in a socket format and then is sent to the master control through a socket;
when a camera is connected to an external device, control protocol information adopted by the camera needs to be recorded on a console, and the control protocol information corresponds to a serial port and a serial number of the external device.
Step 403, after receiving the instruction message sent by the console through the socket, the master controller recognizes that the instruction message is the control instruction message of the camera through unpacking, and then sends the control instruction message to the camera control module.
Step 404, after receiving the camera control instruction message, the camera control module analyzes the control instruction message and temporarily stores the control instruction message; and then identifying control protocol information used by the camera according to the serial port number corresponding to the camera to be controlled, generating different query commands aiming at different camera control protocols, including the model, the focal length and the like of the camera, packaging the query commands into a message format which can be identified by the master control, and sending the message format to the master control.
Step 405, after receiving the message sent by the camera control module in the message queue, the master controller packages the message into a socket format recognizable by the console, and sends the socket format to the console.
Step 406, after receiving the message from the main control through the socket, the console extracts the query command for the camera and sends the query command to the serial port driver module.
Step 407, the serial port driver module sends an inquiry command to the corresponding camera through the serial port to which the camera to be controlled is connected.
Step 408, if the camera can receive the query command, feeding back the relevant control information of the camera, sending the fed-back information to the serial port through the drive of the camera, and then executing step 409; if the camera cannot receive the query command or does not feed back information, step 413 is performed.
And step 409, the serial port driving module reads the information fed back by the camera and sends the read serial port data to the console.
Step 410, the console reads the serial data sent by the serial driver module, encapsulates the serial data into a socket format message that can be identified by the master controller, and then sends the socket format message to the master controller through the socket.
In step 411, after receiving the information fed back by the camera and sent by the console, the master control sends the information to the camera control module by unpacking.
Step 412, the camera control module analyzes according to the information fed back by the camera, calculates the relevant control information of the camera, such as focal length, rotation speed and the like, sends out the actual camera control command which can be identified by the camera according to the camera control command message sent out by the user and stored in step 404, and then executes step 414;
the camera control command that is actually recognizable by the camera is sent relative to the current control state of the camera, that is, the camera control command that is sent based on the current control state of the camera, such as the focal length, the rotation angle, and the like, such as how many degrees the camera rotates again based on the current angle.
Step 413, if the camera control module is overtime in the waiting of the message, adopting a default control method; the default control method can be specifically set according to the application occasion of the video conference terminal or the requirement of the user.
And step 414, the camera control module packages the generated actual camera control command into a message format recognizable by the master control and sends the message format to the master control.
Step 415, after receiving the message sent by the camera control module in the message queue, the master controller encapsulates the message into a socket format recognizable by the console, and sends the socket format to the console.
Step 416, after receiving the message from the main control through the socket, the console extracts the camera control command and sends it to the serial port driver module.
Step 417, the serial port driving module sends the control command of the camera to the corresponding camera through the serial port connected with the camera to be controlled, and the corresponding camera executes the corresponding control action according to the internal processing mechanism of the corresponding camera after receiving the control command of the camera, so as to control the corresponding camera.
In the above steps, steps 404 to 413 may be simplified and omitted, after the camera control module analyzes the camera control instruction message sent by the main control, the camera control module directly sends an actual control command for the camera in step 414, for example, how much the camera is rotated to an absolute angle, and the like, and then encapsulates the control command for the camera into a message format recognizable by the main control, and sends the message format to the main control; alternatively, after step 404 to step 413 are executed for the first time, the required information such as the model of the camera may be recorded, and the subsequent operations may be executed from step 414 after the camera control module analyzes the camera control instruction message sent from the main control without executing step 404 to step 413; in general, these execution steps are flexibly adjustable.
Further, in the method of the present invention, the messages exchanged between the camera control module and the main control, and between the main control and the console adopt specific formats, and the formats of the various messages related to the method of the present invention may be set as follows:
1) camera control command (MessageContent):
since the control commands of the camera are related to the control protocol of the camera, the camera control commands are abstracted as: MessageContent: XX XX... XX (N bytes);
n is determined according to different camera control protocol rules; x is a specific data representation in the MessageContent format defined by different camera control protocols, typically a hexadecimal number.
2) The format of the Message (Message) exchanged between the camera control module and the master control is shown in table 1:
TABLE 1
The interactive messages between the camera control module and the main control module are discharged from left to right in table 1 according to the fields shown in table 1.
3) The format (Frame) of the socket interaction between the master and the console is shown in table 2:
TABLE 2
The socket format of the interaction between the master and the console is arranged from left to right as shown in table 2 according to the fields shown in table 2. In a specific implementation, the message header indication may be fixed to 0xAAH, and the message trailer may be fixed to 0x 55H; the console ID is used to distinguish a plurality of consoles.
The fields of the above message formats are defined as unsigned integer, and the message formats adopt network byte order.
In practical application, after a user sends a camera control instruction Message from a console of an external device, the console encapsulates the camera control instruction Message into a socket format and sends the socket format to a master controller, at this time, a Message in the socket format is an instruction Message format, but not a Message format defined in the foregoing and containing MessageContent that a camera can recognize, and only when an actual MessageContent is generated by a camera control module or a camera control command fed back from the camera is in the format of the MessageContent.
The method and the device provided by the invention can realize the control of a plurality of cameras using the same or different control protocols by using the external equipment, can greatly save expensive conference television terminals in occasions needing a plurality of cameras to participate in the conference television, and do not need to transplant a camera control module to the external equipment by using the method provided by the invention, thereby facilitating the use of users and the development of technical personnel.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (9)
1. A method for controlling video conference terminal camera connects at least one camera to external device through serial port, characterized in that the method also includes:
a. the user sends the encapsulated camera control instruction message to the conference television terminal through the external equipment;
b. the video conference terminal receives and analyzes the camera control instruction message, generates an actual camera control command, encapsulates the generated camera control command and then sends the encapsulated camera control command to the external equipment;
c. the external equipment extracts the camera control command and drives and controls different cameras through the serial ports of the external equipment.
2. The method of claim 1, wherein the encapsulating the camera control instruction message of step a is performed by a console in the external device;
correspondingly, the camera control command extracted in the step c is completed by a console in the external equipment.
3. The method according to claim 2, wherein the video conference terminal comprises a main control module and a camera control module, and the step b specifically comprises:
the master control receives a camera control instruction message sent by the console, unpacks the camera control instruction message and sends the camera control instruction message to the camera control module; the camera control module analyzes the camera control instruction message, generates an actual camera control command, packages the generated camera control command and sends the camera control command to the master control, and the master control packages the camera control command and sends the camera control command to the console.
4. The method according to claim 3, wherein in step a, the console encapsulates the camera control command message into a socket format and sends the socket format to the master controller;
in the step b, the master control packages the camera control command into a socket format and sends the socket format to the console;
and in the step b, the camera control module packages the camera control command into a message format which can be identified by the master control and sends the message format to the master control.
5. The method of claim 4, wherein the message format recognizable by the master includes message source, message source component code, message type, message length, message content;
the socket in step a or step b comprises a message head indication, a message length, a console ID, a control message, a message content and a message tail.
6. The method according to claim 5, wherein the message recognizable by the master controller encapsulated by the camera control module or the socket in step a or step b is in network byte order.
7. A device for controlling a video conference terminal camera is characterized by comprising external equipment and a video conference terminal; wherein,
the external equipment is used for sending the encapsulated camera control instruction message to the video conference terminal, extracting the camera control instruction from the message which is sent by the external equipment from the video conference terminal and is formed by encapsulating the actual camera control instruction corresponding to the camera control instruction, and driving and controlling different cameras through self serial ports;
and the conference television terminal is used for receiving and analyzing the camera control instruction message, generating an actual camera control command, packaging the generated camera control command and then sending the packaged camera control command to the external equipment.
8. The apparatus of claim 7, wherein the external device further comprises a console and a serial driver module; wherein,
the control console is used for sending a camera control instruction message, packaging the camera control instruction message into a socket format and sending the socket format to the video conference terminal, and is also used for sending a camera control command sent by the video conference terminal to the serial port drive module;
and the serial port driving module is used for sending the camera control command to the corresponding camera.
9. The apparatus according to claim 7 or 8, wherein the video conference terminal further comprises a main control and camera control module; wherein,
the main control is used for receiving a camera control instruction message sent by a console in the external equipment, then sending the camera control instruction message to the camera control module, and packaging a camera control command sent by the camera control module into a socket format and sending the socket format to the console on the external equipment;
the camera control module is used for analyzing the camera control instruction message, generating a camera control command, packaging the camera control command into a format which can be identified by the master control and sending the camera control command to the master control.
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| CN101478667B (en) * | 2009-01-19 | 2013-12-11 | 北京中星微电子有限公司 | Method for transmitting information to terminal camera device by customer terminal in network video monitoring system |
| CN101478666A (en) * | 2009-01-19 | 2009-07-08 | 北京中星微电子有限公司 | Tripod head control task operating method and apparatus thereof for terminal video taking device |
| CN103685943A (en) * | 2013-11-22 | 2014-03-26 | 乐视致新电子科技（天津）有限公司 | Display equipment, image capturing and controlling device and image capturing and controlling method |
| CN104980655B (en) * | 2015-06-11 | 2018-03-23 | 阔地教育科技有限公司 | Stabilization image pickup method and system in a kind of straight recorded broadcast interaction systems |
| WO2017166239A1 (en) * | 2016-03-31 | 2017-10-05 | 深圳市大疆灵眸科技有限公司 | Method, device, and system for controlling camera shutter |
| CN109005353A (en) * | 2018-09-07 | 2018-12-14 | 厦门亿联网络技术股份有限公司 | A kind of camera self-adaptation control method and device based on various control agreement |
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| CN1973531A (en) * | 2003-04-25 | 2007-05-30 | 高通股份有限公司 | System for controlling a camera resource in a portable device |
| CN101127893A (en) * | 2007-09-05 | 2008-02-20 | 中国电信股份有限公司 | Integrated control method and system for network camera SIP extension |
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| CN1973531A (en) * | 2003-04-25 | 2007-05-30 | 高通股份有限公司 | System for controlling a camera resource in a portable device |
| CN2836363Y (en) * | 2005-11-02 | 2006-11-08 | 北京东方广视科技有限责任公司 | Digital set-top box mother-son machine system for CATV |
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