CN102547211B - Video conference terminal controller on basis of serial port and control system thereof - Google Patents

Abstract

The present invention provides a video conferencing terminal controller based on a serial port, including devices: an online notification device, which is used to send online notification information to the video conference terminal; an offline notification device, which is used to send offline notification information to the video conference terminal; A control device, which is used to send address identification information to the video conference terminal, wherein the address identification information is used to indicate a call address pre-stored in the video conference terminal; and a control serial port, which is used to connect to the video conference terminal. Corresponding control systems and control methods are also provided. The present invention controls the video conferencing terminal through the video conferencing terminal controller, especially the serial port communication method can avoid remote control difficulties caused by some video conferencing terminals not being placed in the meeting room, and the controller has a simple structure, and the equipped The indicator light and the display screen can well prompt various working states of the video conferencing terminal, which brings simple operation to the user.

Description

A serial port-based video conferencing terminal controller and its control system

technical field

The present invention relates to a control system of an embedded device, especially to provide a desktop-style and more convenient control system for a video conferencing terminal through interconnection through a serial port line, in particular, to a serial port-based video conferencing terminal controller and corresponding control system.

Background technique

At present, the control methods of most video conferencing terminals mainly include OSD and network management. Among them, the OSD needs to be operated by an infrared remote control. Due to the position of some terminals, it is troublesome to operate the remote control. Especially when observing the OSD display, it is necessary to ensure that the fingers of the remote control are pressed correctly, especially if some terminals are not placed on the remote control. In the conference room, the operation method through the remote control is useless.

The network management is to control the terminal equipment through the network, usually through a PC. Especially for some users, it is not necessary to install a network management PC on each seat, which not only increases the cost, but also brings operational difficulties to users, especially some advanced configurations require training costs.

The video conferencing terminal serial port controller can avoid many of the above-mentioned disadvantages for ordinary users. What needs to be supplemented is that the video conferencing terminal must add a business module that communicates with the serial port controller.

Contents of the invention

In view of the defects in the prior art, the object of the present invention is to provide a control method and a corresponding control device.

According to one aspect of the present invention, there is provided a serial port-based video conferencing terminal controller, including devices: an online notification device, which is used to send online notification information to the video conference terminal; an offline notification device, which is used to send the video conference terminal Send offline notification information; call control device, which is used to send address identification information to the video conference terminal, wherein the address identification information is used to indicate the call address pre-stored in the video conference terminal; and control serial port, which is used to connect video conference terminal.

According to another aspect of the present invention, there is also provided a control system comprising a serial port-based video conference terminal controller, including the video conference terminal controller provided according to the present invention, and also including A video conferencing terminal connected to a serial port is controlled, wherein the video conferencing terminal includes the following devices: a third receiving device, which is used to receive the address identification information; a first processing device, which is used to generate the address identification information according to the address identification information. The indicator light control information; the fourth receiving device is used for receiving the indicator light control response information.

According to yet another aspect of the present invention, a serial port-based control method for a video conferencing terminal controller is provided, comprising steps: a. The video conferencing terminal controller sends address identification information to the video conferencing terminal, wherein the address identification information is used for Indicate the network address pre-stored in the video conferencing terminal; b. The video conferencing terminal generates indicator light control information according to the address identification information, wherein the indicator light control information includes indicator light identification information and indicator light status information; c. Video conferencing The terminal sends the indicator light control information to the video conferencing terminal controller; d. The video conferencing terminal controller controls the indicator light according to the indicator light control information, and sends the indicator light control response information to the video conferencing terminal, wherein the indication The light control response information includes indicator light identification information and light state information, wherein the video conference terminal controller is connected to the video conference terminal through a control serial port.

The present invention controls the video conference terminal through the video conference terminal controller, especially adopts the communication mode of the serial port, which can avoid remote control difficulties caused by some video conference terminals not placed in the meeting room. Moreover, the video conferencing terminal controller has a simple structure, and its equipped indicator lights and display screens can well prompt various working states of the video conferencing terminal, which brings simple operation to users.

Description of drawings

Other characteristics, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

FIG. 1 shows a schematic structural diagram of a serial port-based video conferencing terminal controller according to a first embodiment of the present invention;

FIG. 2 shows a schematic structural diagram of a control system of a serial port-based video conferencing terminal controller according to a second embodiment of the present invention;

FIG. 3 shows a schematic structural diagram of a video conference terminal in a control system of a serial port-based video conference terminal controller according to a preferred example of the second embodiment of the present invention;

FIG. 4 shows a flowchart of a control method of a serial port-based video conferencing terminal controller according to a third embodiment of the present invention;

Fig. 5 shows the flowchart of the control method of the video conferencing terminal controller based on the serial port according to the fourth embodiment of the present invention;

FIG. 6 shows a flowchart of a control method of a serial port-based video conferencing terminal controller according to a fifth embodiment of the present invention;

FIG. 7 shows a message diagram of a video conferencing terminal processing link disconnection detection according to a specific embodiment of the present invention; and

Fig. 8 shows a message diagram of processing link disconnection detection by a video conference terminal controller according to another specific embodiment of the present invention.

Detailed ways

Fig. 1 shows a schematic structural diagram of a serial port-based video conferencing terminal controller according to a first embodiment of the present invention. Specifically, in this embodiment, the video conference terminal controller 4 includes devices: an online notification device 403, which is used to send online notification information to the video conference terminal; an offline notification device 404, which is used to send the online notification information to the video conference terminal Send offline notification information; call control device 402, which is used to send address identification information to the video conference terminal, wherein the address identification information is used to indicate the call address pre-stored in the video conference terminal; the first input device 401, which uses For inputting the address identification information; the control serial port 410, which is used to connect to the video conferencing terminal; the first receiving device 405, which is used to receive the indicator light control information from the video conferencing terminal, wherein the indicator light control information includes instructions Light identification information and indicator light state information; indicator light control means 406, which is used to control the indicator light according to the light indicator control information; first sending means 407, which is used to send indicator light control response information to the video conferencing terminal , wherein, the indicator light control response information includes indicator light identification information and indicator light state information; indicator light 409; speaking application device 408, which is used to send speaking application information to the video conference terminal. Preferably, the calling address may be an IP/alias/E.164 number. Preferably, the power supply of the video conferencing terminal controller can adopt a local power supply mode, for example, the video conferencing terminal controller can include a power switch and a power adapter; it can also adopt a remote power supply mode, for example, the video conferencing The terminal controller can be powered through the included RJ4 free line.

More specifically, after the video conference terminal controller 4 is started, the online notification device 403 sends online notification information to the video conference terminal through the control serial port 410 . The first input device 401 may include input devices such as buttons, a keyboard, and a touch screen. The user inputs address identification information to the call control device 402 through the first input device 401, and the call control device 402 receives the address identification information. Information, in a preferred example, the first input device 401 includes four call buttons, these call buttons correspond to four different pieces of address identification information, the user can call the call control device by long pressing the call button for two seconds 402 Send out the corresponding address identification information.

The indicator light 409 may include several lights for indicating different information. In a preferred example, the indicator light 409 includes an online/running light, which is used to indicate the online and running status of the video conferencing terminal controller 4, for example, when the video conferencing terminal controller 4 is powered on, The online/running light will enter a light-on state, and for another example, after the online notification device 403 sends the online notification information to the video conference terminal, it can control the online/running light to enter a blinking state, and for example , after the offline notification device 404 sends the offline notification information to the video conferencing terminal, it may control the online/running light to enter a light-off state.

In another embodiment, the indicator light 409 may include a conference light, which is used to indicate the conference status of the video conference terminal. Specifically, after the call control device 402 sends the address identification information to the video conference terminal through the control serial port 410, if the video conference terminal successfully processes the address identification information, the video conference terminal sends The video conferencing terminal controller 4 sends indicator light control information, and the first receiving device 405 receives the indicator light control information through the control serial port 410, and triggers the indicator light control device 406 to control the indicator light according to the indicator light control information. information to control the lighting of the meeting light, if the indicator light control device 406 successfully controls the meeting light, the light control device 406 triggers the first sending device 407 to send the video signal to the video through the control serial port 410 The conference terminal sends the indicator light control response information. In the same principle, when the call control device 402 cancels the conference, the indicator light control device 406 controls the conference light to turn off according to the indicator light control information of the video conference terminal.

In yet another preferred example, the indicator light 409 includes a speech light. Specifically, the speech application device 408 may include a button, and the user can apply for a speech by pressing the button, and then the speech application device 408 sends the speech application information to the video conference terminal through the control serial port 410, so If the video conferencing terminal successfully processes the speaking application information, the video conferencing terminal will send the indicator light control information to the video conferencing terminal controller, and the indicator light control device 406 will control the speaking light to turn on .

Further, the communication protocol message format between the video conference terminal controller and the video conference terminal may be defined in the following preferred manner:

The video conferencing terminal controller communicates with the video conferencing terminal through the control serial port, and the first thing to be determined is the format of the communication protocol between the two. The video conferencing terminal controller communicates with the video conferencing terminal using a fixed-length message, 4 bytes:

start word Command word parameter word checksum

Among them, the start word is one byte: 0xFF; the command word is one byte, the meanings are as follows:

0x01->Call button 1 is pressed (long press for two seconds);

0x02->Call button 2 is pressed (long press for two seconds);

0x03->Call button 3 is pressed (long press for two seconds);

0x04->Call button 4 is pressed (long press for two seconds);

0x05->Speak button is pressed (long press for two seconds);

0x06->light control (sent by the video conferencing terminal to the video conferencing terminal controller);

0x07->light control response (sent by the video conferencing terminal controller to the video conferencing terminal);

0x08->mtcbox online notification (sent by the video conference terminal controller to the video conference terminal);

0x09->mtcbox offline notification (sent by the video conference terminal controller to the video conference terminal).

0xEE->keep alive command

The parameter word is one byte:

For example, the indicator light control information and indicator light control response information use parameter words. For the indicator light control command (0x06), the format of the parameter word is:

Light ID light status

The light ID and light state each occupy 4 bits.

The lamp ID can take the following values:

0001B: light call button 1;

0010B: light call button 2;

0011B: light call button 3;

0100B: light call button 4;

0101B: Light and speak button;

0110B: Online and running lights (online and running status share one indicator light);

0111B: meeting lights;

1000B: Speech lamp;

Among them, the light state can take the following values:

0001B: light on;

0010B: light off;

0011B: Flashes for 1 second.

For the indicator light control response command (0x07), the format of the parameter word is:

Light ID result

The light ID and the result each occupy 4 bits. The lamp ID has the same meaning as the lamp control command (0x06).

The result can take the following values:

0001B: success;

0010B: Failed.

Wherein, the check word is preferably the sum of the command word and the parameter word, and then the highest bit is set to 0.

In a preferred example of this embodiment, the video conference terminal controller 4 may further include a display screen, wherein the display screen may include a liquid crystal display screen. Preferably, the display screen can be connected to the call control device 402, and the call control device 402 can send the address identification information to the display screen, and the display screen displays the address identification information. Preferably, the display screen can be connected to the speaking application device 408, the speaking application device 408 sends the speaking application information to the display screen, and the display screen displays the speaking application information, further preferably, The display screen may also be connected to the indicator light control device 406, and the indicator light control device 406 receives and sends to the display screen light control information corresponding to the video conferencing terminal successfully processing the speaking application information , the display screen displays the speaking state information as speaking successfully accepted after receiving the indicator light control information.

In a variation of this embodiment, the speaking application device 408 may be omitted. In another variation of this embodiment, the indicator light 409 may be omitted, and correspondingly, the first receiving device 405, the indicator light control device 406 and the first sending device 407 may be omitted.

Fig. 2 shows a schematic structural diagram of a control system of a serial port-based video conferencing terminal controller according to a second embodiment of the present invention. Specifically, the control system includes a video conference terminal controller 4' and a video conference terminal 5, wherein those skilled in the art can understand the video conference terminal controller 4' as the A variation example of the video conference terminal controller 4, the difference between the video conference terminal controller 4' and the video conference terminal controller 4 is that the video conference terminal controller 4' also includes a first link disconnection detection device 411 , a control serial port 410 , a second receiving device 412 , a first setting device 413 and a third sending device 414 . Wherein, the second receiving means 412 is used to receive an interval time setting command from a video conferencing terminal, wherein the interval time setting command is used to indicate the interval time for pressing the first input means; the first setting means 413 is used to set the interval time for pressing the first input device according to the interval time setting command; the third sending device 414 is used to send a response to the interval time setting command to the video conference terminal. Further, the first link disconnection detection device 411 is used to detect whether the video conferencing terminal is disconnected, preferably, the first link disconnection detection device 411 includes a second sending device 4111, a first judging device 4112, a second judging device The means 4113 and the first determining means 4114, wherein the second sending means 4111 is configured to send a keep-alive command to the video conferencing terminal, and the first judging means 4112 is configured to judge whether the keep-alive command from the video conferencing terminal is received Response, the second judging means 4113 is used for judging whether the number of consecutive times that the first judging means 4112 has not received the keep-alive command response exceeds the first when the judging result of the first judging means 4112 is negative. Threshold, the first determining means 4114 is used to determine that the video conferencing terminal is disconnected when the determination result of the second determining means 4113 is affirmative. Preferably, the keep-alive command is 4 bytes, and the sending sequence is the initial word 0xFF, the command word 0xEE, the parameter word 0x00, and the check word 0x6E.

Further, the video conference terminal controller 4' is connected to the video conference terminal 5, specifically, the video conference terminal controller 4' includes a control serial port 410, and the video conference terminal 5 includes a control serial port 501, wherein, The control serial port 410 matches the control serial port 501 and is connected to each other through a serial cable. Preferably, the control serial port 410 and the control serial port 501 may be RS485 interfaces or RS232 interfaces.

Further, the video conferencing terminal controller 4 ′ detects whether the video conferencing terminal is disconnected through the first link disconnection detecting means 411 . With reference to the broken link detection message diagram shown in FIG. 8, the video conference terminal controller is marked as " Mtc_Box ", and the video conference terminal is marked as " MT ". Specifically, after the initialization of the first link disconnection detection device 411, the online status of the video conferencing terminal 5 is set to be false, and the status of all or part of the indicator lights is set to be off by the indicator light control device, and the link disconnection statistics The number of times is initialized to 0, start the keep-alive command timer and set the timing period as half a second; then the second sending device 4111 regularly sends the keep-alive command to the video conference terminal 5 through the control serial port 410 every half second command; the first judging means 4112 judges whether a keep-alive command from the video conferencing terminal is received within the current timing period, and if received, the first disconnection detecting means 411 sets the video conferencing terminal 5 If the online status of the online status is true, the number of disconnection statistics is set to 0, and the status of the indicator light is set to be on; if the first judging means 4112 does not receive a keep-alive command from the video conferencing terminal within the current timing period , then increase the number of link disconnection statistics by 1, and then the second judging means 4113 judges whether the number of link disconnection statistics exceeds 10 times, if not, the second sending means 4111 sends the keep-alive command again , if it exceeds, trigger the first determining device to determine that the video conferencing terminal is disconnected, and set the state of the indicator light to be off.

Furthermore, the second receiving means 412 may receive an interval time setting command from the video conferencing terminal, and then the first setting means 413 may set the interval pressed by the first input means according to the interval time setting command. time, if the setting is successful, the first setting means 413 triggers the third sending means 414 to send an interval time setting command response to the video conferencing terminal 5 . Wherein, the video conferencing terminal controller communicates with the video conferencing terminal through a control serial port, and the first thing to be determined is the format of the communication protocol between the two. The video conference terminal controller communicates with the video conference terminal using a fixed-length message, 4 bytes.

start word Command word parameter word checksum

Among them, the start word is one byte: 0xFF; the command word is one byte, the meaning is as follows:

0x10->Set the interval time for pressing the button (sent by the video conference terminal to the video conference terminal controller);

0x11->Set the interval response for pressing the button (sent by the video conference terminal controller to the video conference terminal).

Among them, for setting the interval time of pressing the button (0x10), the format of the parameter word is:

ms/50

Take ms as the unit, divide by 50, assume it is 2000ms, and the parameter word is 40. The range is 200ms-2000ms.

Response (0x11) to the interval time for setting the button press:

The result can take the following values:

1: success;

Other: Failed.

In a preferred example of this embodiment, the video conference terminal controller 4' may further include a display screen, wherein the display screen is used to display link disconnection prompt information received from the second A link disconnection detecting device 411, configured to prompt whether the video conferencing terminal is disconnected.

Fig. 3 shows a schematic structural diagram of a video conference terminal in a control system of a serial port-based video conference terminal controller according to a preferred example of the second embodiment of the present invention. Specifically, in this embodiment, the video conference terminal 5 includes a device: a control serial port 501, which is used to connect to the video conference terminal controller; a second link disconnection detection device 502, which is used to detect the video conference Whether the terminal controller is disconnected; the speaking application receiving means 503, which is used to receive the speaking application information; the third receiving means 504, which is used to receive the address identification information; the first processing means 505, which is used to The address flag information generates the indicator light control information; the fourth receiving means 506 is used to receive the indicator light control response information; the third sending means 507 is used to send the said indicator light control information to the video conference terminal controller. Time interval setting command; fifth receiving means 208, which is used for receiving the response of the interval time setting command.

More specifically, the third receiving means 504 receives the address identification information sent by the call control means of the video conference terminal controller through the control serial port 501, and then the first processing means 505 according to the The address identification information generates the indicator light control information, and then sends it to the first receiving device 405 of the video conference terminal controller through the control serial port 501; wait for the video conference terminal controller to feed back the indicator light control response The information is received by the fourth receiving device. More specifically, the video conference terminal 5 sends the time interval setting command to the second receiving device of the video conference terminal controller through the third sending device 507 through the control serial port 501; When the conference terminal controller feeds back the interval time setting command response, it is received by the fifth receiving device. Preferably, the speaking application receiving means 503 receives the speaking application information sent by the speaking application means 408 of the video conference terminal.

Preferably, the second link disconnection detecting means 502 includes a third judging means 5021, a fourth judging means 5022, a second determining means 5023 and a first keep-alive responding means 5024, wherein the third judging means 5021 is used to Judging whether the keep-alive command is received, the fourth judging means 5022 is configured to judge that the third judging means 5021 has not received the keep-alive command when the judging result of the third judging means 5021 is negative Whether the number of consecutive times exceeds the second threshold, the second determination means 5023 is used to determine that the video conference terminal controller is disconnected when the determination result of the fourth determination means 5022 is affirmative, and the first keep-alive The response means 5024 is configured to receive the keep-alive command, and feed back the keep-alive command response according to the keep-alive command.

Further preferably, the video conferencing terminal controller 5 detects whether the video conferencing terminal is disconnected through the second link disconnection detecting means 502 . With reference to the broken link detection message diagram shown in FIG. 7, the video conferencing terminal controller is marked as " Mtc_Box ", and the video conferencing terminal is marked as " MT ". Specifically, after the initialization of the second link disconnection detection device 502, set the online status of the video conferencing terminal controller to be false, initialize the number of link disconnection statistics to 0, start the keep alive command timer and set the timing period to 2 seconds; Then the third judging means 5021 regularly judges whether the keep-alive command is received every 2 seconds, if received, the third judging means 5021 sets the online status of the video conferencing terminal controller as true, Set the number of link disconnection statistics to 0, and trigger the first keep-alive command responding device 5024 to feed back the keep-alive command; For the keep-alive command of the controller, the number of broken link statistics is increased by 1, and then the fourth judging means 5022 judges whether the said broken link statistical times exceed 3 times, if not, restart the keep-alive command timer And trigger the first keep-alive command response unit 5024 to feed back the keep-alive command, if it exceeds, trigger the second determining unit 5023 to determine that the video conference terminal is disconnected, and send a user command to the video conference terminal controller The control signal is used to set the state of the indicator light to be off.

Those skilled in the art understand that the video conferencing terminal 5 may preferably have some or all of the functional modules of a general video conferencing terminal in the prior art to achieve corresponding applications. Preferably, on this basis, the video conferencing terminal must A service module for serial port communication with the video conferencing terminal controller is added. Such a service module can be implemented with reference to the various devices described in the video conferencing terminal in the above embodiment, and will not be described in detail here. .

Preferably, the indicator light of the video conference terminal controller can be controlled in the following form. For example, the indicator light may comprise a call control button light. Specifically, the first input device may include 4 buttons, and the 4 buttons are respectively used to initiate calls to different call addresses, and 4 lights of the call control button are provided correspondingly to the 4 buttons. More specifically, when there is no call, the light of the call control button is off; press and hold the button for 2 seconds to initiate a call, and during the call, the light of the call control button (preferably a green light) flickers and is on for 1 second. If the call is successful, the call control button light (preferably green light) will be on; if the call fails, the call control button light will be off; hang up the current meeting or the video by pressing the button for 2 seconds When the conference terminal voluntarily withdraws from the conference, the light of the call control button is off.

For another example, the indicator light includes a speaking button light, wherein the speaking button light corresponds to a speaking application device (eg, a speaking application button). Specifically, when the video conferencing terminal controller does not apply for speaking, the speaking button light is off; after pressing and holding the speaking button for 2 seconds, the speaking application is turned on, and when the speaking application is waiting for a response, the speaking button light (preferably a green light) ) flashes, on for 1 second and off for 1 second; if the speaking application is successful, the speaking button light is off (at the same time, the speaking light is always on); if the speaking application fails, the speaking button light is off (at the same time, The speech light is off); but when the terminal speaker is canceled (for example, the speech can be canceled by pressing and holding the speech application button for 2 seconds), the speech button light is off.

For another example, the indicator light includes an online/running light. Specifically, the video conferencing terminal controller is powered on and running normally, the online/running light (preferably green light) flickers, on for 1 second and off for 1 second; the video conferencing terminal controller and the video conferencing terminal establish If the video conferencing terminal controller is disconnected from the video conferencing terminal, the online/running light will flash; if the video conferencing terminal controller is powered off, the Online/running light is off.

For another example, the indicator light includes a conference light. Specifically, if the video conferencing terminal controller is currently connected to the video conferencing terminal to enter a conference, the conference light is on; if the video conferencing terminal controller is currently connected to the video conferencing terminal and has not become a speaker, the conference light off.

For another example, the indicator light includes a speech light. Specifically, if the video conference terminal currently connected to the video conference terminal controller is a multipoint conference speaker, or in a point-to-point state, the speaking light (preferably a green light) is always on; if the video conference terminal If the video conferencing terminal currently connected to the controller does not become a speaker, the speaking indicator is off.

The video conferencing terminal controller and the control system provided according to the present invention are described above through FIGS. 1 to 3 , and the corresponding control method will be described next through FIGS. 4 to 6 . Specifically, FIG. 4 shows a flowchart of a method for controlling a serial port-based video conferencing terminal controller according to a third embodiment of the present invention. More specifically, in this embodiment, step S210 is first performed, the video conferencing terminal controller sends online notification information to the video conferencing terminal, wherein the video conferencing terminal controller connects to the video conferencing terminal through the control serial port For a conference terminal, after the video conference terminal controller 4 is started, it sends the online notification information to the video conference terminal.

Then enter step S211, the video conference terminal controller sends address identification information to the video conference terminal, wherein the address identification information is used to indicate the calling address pre-stored in the video conference terminal, preferably the address identification information is input by the user The device is input to the video conference terminal controller. For example, the user can input address identification information through input devices such as buttons, keyboards, and touch screens. In a preferred example, the user can input the address identification information through four call buttons. These The call buttons correspond to four different pieces of address identification information, and the user can input the corresponding address identification information by pressing and holding the call button for two seconds. After receiving the address identification information input by the user, the video conference terminal controller further sends the address identification information to the video conference terminal.

Then enter step S212, the video conferencing terminal generates indicator light control information according to the address identification information, wherein the indicator light control information includes indicator light identification information and indicator light state information. Specifically, the indicator light control information may include control information of the call control button light, and may also include control information of the conference light.

Then enter step S213, the video conference terminal sends the indicator light control information to the video conference terminal controller. Then by executing step S214, the video conferencing terminal controller controls the indicator light according to the indicator light control information, and sends indicator light control response information to the video conferencing terminal, wherein the indicator light control response information includes indicator light identification information and instructions Light status information, for example, the indicator light identification information is used to indicate a certain light in the call control button lights, and the indicator light status information is used to indicate that the indicator light is always on. Finally, step S215 is executed, and the video conferencing terminal controller sends offline notification information to the video conferencing terminal.

More specifically, the video conferencing terminal controller communicates with the video conferencing terminal through the control serial port, and the format of the communication protocol between the two must be determined first. The video conference terminal controller communicates with the video conference terminal using a fixed-length message, 4 bytes.

start word Command word parameter word checksum

Among them, the start word is one byte: 0xFF; the command word is one byte, the meaning is as follows:

0x01->Call button 1 is pressed (long press for two seconds);

0x02->Call button 2 is pressed (long press for two seconds);

0x03->Call button 3 is pressed (long press for two seconds);

0x04->Call button 4 is pressed (long press for two seconds);

0x05->Speak button is pressed (long press for two seconds);

0x06->light control (sent by the video conferencing terminal to the video conferencing terminal controller);

0x07->light control response (sent by the video conferencing terminal controller to the video conferencing terminal);

0x08->mtcbox online notification (sent by the video conference terminal controller to the video conference terminal);

0x09->mtcbox offline notification (sent by the video conference terminal controller to the video conference terminal).

0xEE->keep alive command

The parameter word is one byte:

For example, the indicator light control information and indicator light control response information use parameter words. For the indicator light control command (0x06), the format of the parameter word is:

Light ID light status

The light ID and light state each occupy 4 bits.

The lamp ID can take the following values:

0001B: light call button 1;

0010B: light call button 2;

0011B: light call button 3;

0100B: light call button 4;

0101B: Light and speak button;

0110B: Online and running lights (online and running status share one indicator light);

0111B: meeting lights;

1000B: Speech lamp;

Among them, the light state can take the following values:

0001B: light on;

0010B: light off;

0011B: Flashes for 1 second.

For the indicator light control response command (0x07), the format of the parameter word is:

Light ID result

The light ID and the result each occupy 4 bits. The lamp ID has the same meaning as the lamp control command (0x06).

The result can take the following values:

0001B: success;

0010B: Failed.

Wherein, the check word is preferably the sum of the command word and the parameter word, and then the highest bit is set to 0.

In a preferred example of this embodiment, the control method further includes the step of "the video conferencing terminal controller sends speech application information to the video conferencing terminal", specifically, the video conferencing terminal receives information from the video conference The speaking application information sent by the conference terminal controller, and processing the speaking application information, if the speaking application is successful, the video conference terminal sends the indicator light control information to the video conference terminal controller to click Brighten the speaking light, and send speaking status information for indicating that the speaking is accepted; if the speaking application fails, the video conferencing terminal sends the indicator light control information to the video conferencing terminal controller to turn off the A speech lamp, and sending speech status information for indicating that the speech is not accepted.

Fig. 5 shows a flowchart of a control method of a serial port-based video conferencing terminal controller according to a fourth embodiment of the present invention. This embodiment shows how the video conferencing terminal controller detects that the video conferencing terminal is disconnected According to the technical solution, these steps are preferably executed repeatedly after the video conferencing terminal controller goes online until the video conferencing terminal controller goes offline. Specifically, in this embodiment, step S220 is first performed, the video conferencing terminal controller sends a keep-alive command to the video conferencing terminal, and starts a first timer. Specifically, after the video conferencing terminal controller is initialized Set the online status of the video conferencing terminal to be false, set all or part of the indicator lights to be off, initialize the first timer overtime to 0, start the first timer and set the timing period to preferably half a second. Next, enter step S221 to determine whether a keep-alive command response from the video conferencing terminal is received before the first timer expires, and further, if the determination result of the step S221 is affirmative, the If the keep-alive command response from the video conferencing terminal is received before the first timer expires, then proceed to step S222 to continue execution; if the judgment result of the step S221 is negative, that is, when the first timer expires If no keep-alive command response from the video conferencing terminal is received before, the number of timeouts of the first timer is increased by 1, and then enter step S223 to continue execution.

Wherein, through the step S222, if the judgment result of the step S221 is affirmative, then kill the first timer, determine that the video conferencing terminal is online, preferably, set the online status of the video conferencing terminal If it is true, set the number of timeouts of the first timer to 0, and set the state of the indicator light to be on. If the judgment result of the step S221 is negative, then by executing the step S223 next, if the judgment result of the step S221 is negative, it is judged whether the consecutive number of times that the first timer times out exceeds the second Threshold value, further, if the judgment result of the step S223 is affirmative, that is, the consecutive number of times that the first timer times out exceeds the second threshold value, then proceed to step S225 to continue execution; if the judgment result of the step S223 If it is negative, that is, the number of consecutive timeouts of the first timer does not exceed the second threshold, then proceed to step S224 to continue execution.

Wherein, by executing the step S224, if the determination result of the step S223 is negative, restart the first timer. If the judging result of the step S223 is affirmative, then by executing the step S225, if the judging result of the step S223 is affirmative, it is determined that the video conferencing terminal is disconnected. Further, after step S225 determines that the video conferencing terminal is disconnected, then step S226 is executed to turn off all or part of the indicator lights.

Fig. 6 shows a flowchart of a control method of a serial port-based video conferencing terminal controller according to a fifth embodiment of the present invention. This embodiment shows the technical solution of how the video conferencing terminal detects that the video conferencing terminal controller is disconnected. These steps are preferably executed repeatedly after the video conferencing terminal controller goes online until the video conferencing terminal controller offline. Specifically, in this embodiment. First execute step S230, the video conferencing terminal starts the second timer, and after the video conferencing terminal is initialized, the online status of the video conferencing terminal controller is set to be false, the number of timeouts of the second timer is initialized to 0, and the second timer is started. Timer and set the timing period to 2 seconds. Next, enter step S231, and judge whether to receive the keep-alive command from the video conferencing terminal controller before the second timer expires, and further, if the judgment result of the step S231 is affirmative, that is Receive the keep-alive command from the video conferencing terminal controller before the second timer expires, then proceed to step S232 to continue execution; if the judgment result of the step S231 is negative, that is, If the keep-alive command from the video conference terminal controller is not received before the second timer expires, the number of times the second timer expires is increased by 1, and then enters step S233 to continue execution.

Wherein, through the step S232, if the judgment result of the step S231 is affirmative, then kill and restart the second timer, and determine that the video conference terminal controller is online, and set the second timer The number of device timeouts is 0. If the judgment result of the step S231 is negative, then by executing the step S233 next, if the judgment result of the step S231 is negative, it is judged whether the continuous number of times that the second timer times out exceeds the second Threshold value, further, if the judgment result of the step S233 is affirmative, that is, the number of consecutive times that the second timer times out exceeds the second threshold value, then proceed to step S235 to continue execution; if the judgment result of the step S233 If it is negative, that is, the number of consecutive timeouts of the second timer does not exceed the second threshold, then proceed to step S234 to continue execution.

Wherein, by executing the step S224, if the determination result of the step S233 is negative, restart the second timer. By executing the step S235, if the determination result of the step S233 is affirmative, it is determined that the video conference terminal controller is disconnected.

Further, referring to the above-mentioned Fig. 7 and Fig. 8, the video conferencing terminal controller provided by the present invention and its corresponding video conferencing terminal complete the communication process in the following manner:

1) The video conferencing terminal controller only needs to notify the video conferencing terminal of the status of the button being pressed, and the video conferencing terminal is responsible for lighting the lights (except the system running light/online light), and the video conferencing terminal controller will only turn off after detecting a broken link all lights. The status of the system running light/online light is maintained by the video conferencing terminal controller. Those skilled in the art can understand in combination with the prior art and the above-mentioned embodiments that the status of the button being pressed or not being pressed indicates the communication status or the non-communication status; This will not be repeated;

2) After the video conferencing terminal controller is started, it needs to send keep-alive commands regularly so that the video conferencing terminal can detect it. Those skilled in the art can understand in combination with the prior art and the foregoing embodiments that, preferably, the keep-alive command is 4 bytes. Correspondingly, the order of sending the keep-alive command can be determined according to the needs of the implementation. For example, preferably, the initial word according to the sending order is 0xFF, and the command word is 0xEE; correspondingly, the subsequent parameter words and check words can be determined according to the implementation requirements. It is determined by need and will not be repeated here;

3) Use the keep-alive command to detect broken links. Specifically, it is divided into the following steps:

3.1) Broken link detection of video conferencing terminals. As shown in Figure 7, the video conferencing terminal needs to add a broken link detection function. After receiving the keep-alive command, it will respond with a keep-alive command. If the current Mtc_Box online status is false, the indicator light will be refreshed. Set the Mtc_Box online status to true and turn it off. Link break detection timer and restart this timer. If the disconnection detection timer timeouts for three consecutive times, it is considered that the Mtc_Box has been disconnected, and the online status of the Mtc_Box is set to false;

3.2) The broken link detection of the video conferencing terminal controller. As shown in FIG. 8 , after the video conference terminal controller is initialized, the keep-alive timer is started, and the keep-alive command is sent regularly. If no keep-alive command response is received from the MT after sending the keep-alive command for 10 consecutive times (the preferred number of times can also be determined according to implementation needs), it is considered that the link has been disconnected. After a broken link is detected, the status of all lights needs to be set to off. The interval of the keep-alive timer is temporarily set to 0.5 seconds. If you want to improve the sensitivity of link disconnection detection, you can further set this value to a smaller value, such as 0.2 seconds, which will not be described here.

Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art may make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention.

Claims (19)

1. the video conference terminal controller based on serial ports, is characterized in that, comprises as lower device:

-the notifying device of reaching the standard grade, it is for sending to video conference terminal the announcement information of reaching the standard grade;

-the notifying device that rolls off the production line, it is for sending to video conference terminal the announcement information that rolls off the production line;

-call control apparatus, it is for sending address identification message to video conference terminal, and wherein, described address identification message is used to indicate the call address prestoring in video conference terminal;

-control serial ports, it is for connecting video conference terminal;

-indicator light;

-first receiving device, it is for receiving the indicator light control information from video conference terminal, and wherein, described indicator light control information comprises indicator light sign information and LED status information;

-controlling apparatus for indicator lamp, it is for according to indicator light described in described indicator light control information control; And

The-the first dispensing device, it is for sending indicator light control echo message to video conference terminal, and wherein, described indicator light control echo message comprises indicator light sign information and LED status information.

2. video conference terminal controller according to claim 1, is characterized in that, also comprises as lower device:

The-the first broken chain detecting device, it is for detection of whether chain rupture of video conference terminal.

3. video conference terminal controller according to claim 2, is characterized in that, described the first broken chain detecting device comprises as lower device:

The-the second dispensing device, it is for sending keepalive command to video conference terminal;

The-the first judgment means, it is responded for judging whether the keepalive command receiving from video conference terminal;

The-the second judgment means, it judges that described the first judgment means does not receive the read-around ratio that described keepalive command responds and whether exceedes first threshold when being negative when the judged result of described the first judgment means;

The-the first determining device, it determines video conference terminal chain rupture when being sure when the judged result of described the second judgment means.

4. according to the video conference terminal controller described in any one in claims 1 to 3, it is characterized in that, also comprise as lower device:

The-the first input unit, it is for inputting described address identification message;

The-the second receiving system, it wherein, arranges order described interval time and is used to indicate the interval time under described the first input unit signature for receiving from the interval time of video conference terminal order being set;

The-the first setting device, it is for according to the first input unit described in command set interval time under giving as security is set described interval time;

-tri-dispensing devices, it arranges order response interval time for sending to video conference terminal.

5. according to the video conference terminal controller described in claim 2 or 3, it is characterized in that, also comprise as lower device:

-speech application device, it is for sending speech application information to video conference terminal.

6. video conference terminal controller according to claim 5, is characterized in that, also comprises display screen, its for the information of showing below any or appoint much information:

-described address identification message;

-chain rupture information, it is received from described the first broken chain detecting device, for pointing out the whether chain rupture of described video conference terminal;

-floor status information, whether it is received from described speech application device, for pointing out described speech application information to be accepted.

7. video conference terminal controller according to claim 1, is characterized in that, described control serial ports comprise as in lower interface any or appoint multiple interfaces:

-RS485 interface; Or

-RS232 interface.

8. a control system that comprises the video conference terminal controller based on serial ports, comprise video conference terminal, it is characterized in that, also comprise the video conference terminal controller described in any one in claim 1 to 7, wherein, described video conference terminal controller connects described video conference terminal by controlling serial ports, and wherein, described video conference terminal comprises as lower device:

-tri-receiving systems, it is for receiving described address identification message;

The-the first processing unit, it is for generating described indicator light control information according to described address identification message;

-tetra-receiving systems, it is for receiving described indicator light control echo message.

9. control system according to claim 8, is characterized in that, described video conference terminal also comprises as lower device:

The-the second broken chain detecting device, it is for detection of the whether chain rupture of described video conference terminal controller.

10. control system according to claim 9, is characterized in that, described the second broken chain detecting device comprises as lower device:

-tri-judgment means, it is for judging whether to receive keepalive command;

-tetra-judgment means, it judges whether the read-around ratio that described the 3rd judgment means does not receive described keepalive command exceedes Second Threshold when being negative when the judged result of described the 3rd judgment means;

The-the second determining device, it determines the chain rupture of described video conference terminal controller when being sure when the judged result of described the 4th judgment means;

Device is responded in the-the first keep-alive, and it is for receiving described keepalive command, and according to described keepalive command, feeds back described keepalive command and respond.

11. control system according to claim 8, is characterized in that, described video conference terminal also comprises as lower device:

-tri-dispensing devices, it is for arranging order to described video conference terminal controller transmission time interval;

-five receiving systems, it arranges order response for receiving the described time interval.

12. control system according to claim 8, is characterized in that, described video conference terminal also comprises as lower device:

-speech application receiving system, it is for receiving speech application information.

13. control system according to claim 8, is characterized in that, described control serial ports comprise as in lower interface any or appoint multiple interfaces:

-RS485 interface; Or

-RS232 interface.

The control method of 14. 1 kinds of video conference terminal controllers based on serial ports, is characterized in that, comprises the steps:

A. video conference terminal controller sends address identification message to video conference terminal, and wherein, described address identification message is used to indicate the network address prestoring in video conference terminal;

B. video conference terminal generates indicator light control information according to described address identification message, and wherein, described indicator light control information comprises indicator light sign information and LED status information;

C. video conference terminal sends described indicator light control information to video conference terminal controller;

D. video conference terminal controller is according to described indicator light control information control indicator light, and sends indicator light control echo message to video conference terminal, and wherein, described indicator light control echo message comprises indicator light sign information and LED status information,

Wherein, described video conference terminal controller connects described video conference terminal by controlling serial ports, and described video conference terminal controller is according to the video conference terminal controller described in any one in the claims 1 to 7.

15. control methods according to claim 14, is characterized in that, any in also comprising the steps or a plurality of step:

-described video conference terminal controller sends to described video conference terminal the announcement information of reaching the standard grade;

-described video conference terminal controller sends to described video conference terminal the announcement information that rolls off the production line;

-described video conference terminal controller sends speech application information to described video conference terminal.

16. control methods according to claim 14, is characterized in that, also comprise the steps:

A. described video conference terminal controller sends keepalive command to described video conference terminal, starts first timer;

B. judge the keepalive command response whether receiving from described video conference terminal before described first timer is overtime;

If C. the judged result of described step B is sure, kill described first timer, determine that described video conference terminal is online;

If C'. the judged result of described step B negates, judge whether the overtime read-around ratio of described first timer exceedes Second Threshold;

If D'. the judged result of described step C' is sure, determine described video conference terminal chain rupture;

If D''. the judged result of described step C' negates, restart described first timer.

17. control methods according to claim 16, is characterized in that, also comprise the steps:

E'. close all or part of described indicator light.

18. control methods according to claim 14, is characterized in that, also comprise the steps:

I. described video conference terminal starts second timer;

Ii. judge and before described second timer is overtime, whether receive the keepalive command from described video conference terminal controller;

If iii. the judged result of described step I i is sure, kills and restart described second timer, and determining that described video conference terminal controller is online;

If iii'. the judged result of described step I i negates, judge whether the overtime read-around ratio of described second timer exceedes Second Threshold;

If iiii'. the judged result of described step I ii' is sure, determine the chain rupture of described video conference terminal controller;

If iiii''. the judged result of described step I ii' negates, restart described second timer.

19. control methods according to claim 14, is characterized in that, described control serial ports comprise as in lower interface any or appoint multiple interfaces:

-RS485 interface; Or

-RS232 interface.

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