CN1578455A - Meeting television terminal capable of simultaneously supporting multiple protocol and method thereof - Google Patents

Abstract

The invention discloses a video conference terminal supporting multiple protocols and a method thereof in the field of video communication, comprising three central processor modules, two video interface modules, an audio DSP module, an audio interface module, a control module and a flash memory module ; Also include E1 line or ISDN line interface module, Ethernet interface module and other protocol interface modules, above-mentioned interface module is connected with described three CPU modules by PCI bus, thereby makes each module be connected together by PCI standard bus, To achieve mutual cooperation. It overcomes the problem that video conference terminals with different protocols cannot be interconnected and interoperable in the prior art, and realizes that a video conference terminal supports multiple protocols at the same time, so that it can be effectively used in conferences under different line environments TV terminal, which saves cost and facilitates maintenance.

Description

Conference TV terminal and method thereof supporting multiple protocols at the same time

technical field

The invention relates to the field of video communication, in particular to a video conference terminal in a video communication system.

Background technique

As people's demand for communication increases day by day, the requirements for communication forms become more and more extensive, and the video communication system develops rapidly in such demands. At present, various conference video systems are widely used in various fields such as government, education, and enterprises. In today's video conferencing system, there are many manufacturers providing equipment, the communication protocols used are also different, and the lines used by users are different, which leads to the inability to realize interconnection between users of different lines. It is a common fact that users generally choose E1 leased lines, ISDN lines or IP lines according to their actual conditions. Because the videoconferencing protocols adopted by the above-mentioned different lines are completely different, for example, the E1 dedicated line needs to use the H.320 protocol, while the IP line needs to use the H.323 protocol. In the prior art, multiple protocols cannot be integrated into one video conference terminal for implementation. In this case, if a certain user wants to use the video conference terminal of the IP line (using the H.323 protocol) and the video conference terminal of the E1 dedicated line (using the H.320 protocol) to hold a video conference together, he must pass the video conference system The MCU (Multipoint Conference Control Unit) in the MCU performs protocol conversion. Therefore, if the user's MCU does not have the protocol conversion function, there is no way for the video conference terminals with two different protocols to be interconnected.

Contents of the invention

The purpose of the present invention is to overcome the problem that video conference terminals with different protocols cannot be interconnected in the prior art, so as to provide a video conference terminal that supports multiple protocols at the same time, so that it can be used in different line environments A videoconferencing terminal that can be effectively used in any situation.

In order to achieve the above object, the present invention constructs a kind of video conference terminal supporting multiple protocols, including three identical CPU modules, two video interface modules, audio digital signal processor (DSP) module, audio interface module, Control module and flash memory module; The two video interface modules are respectively connected to the first CPU module and the second CPU module to complete the input and output of two-way video; the audio DSP module is connected to The third central processing unit module is connected with the audio interface module simultaneously to complete the functions of audio processing, input and output; three central processing unit modules are connected on a peripheral device interconnection (PCI) bus to coordinate Work, simultaneously described control module and described flash memory module are connected on the PCI bus by the expansion input output (XIO) bus that central processing unit supports, finish the control function of internal circuit, and realize some external interface control, it is characterized in that: Also comprise E1 line, V.35 line or ISDN line interface module, Ethernet interface module and H.324 agreement line interface module, above-mentioned interface module is connected with described three CPU modules by PCI bus, thereby makes each module pass through The PCI standard bus is connected together to realize mutual cooperation.

The present invention also proposes a method for supporting a multi-protocol video conferencing terminal, which is characterized in that it includes the following steps:

Step 1: storing multiple sets of terminal protocol programs corresponding to multiple protocols in the flash memory module of the video conference terminal, and assigning fixed address spaces respectively in the flash memory module, and setting flag bits;

Step 2: Power on the videoconferencing terminal, the boot program automatically checks the flag, if the flag is a set value, the boot program automatically guides a terminal protocol program; if the flag is another When the value is set, the boot program automatically guides another terminal protocol program; if the flag is defined as other set values, it can be extended to an H.324 protocol program;

Step 3: Change the flag bit by selecting the interface of each protocol software, select H.323 protocol program, H.320 protocol program or H.324 protocol program to restart.

Using the video conferencing terminal and its method described in the present invention, users can implement multiple protocols on one video conference terminal at the same time as required, so that the same video conference terminal can support multiple protocols at the same time, and it is easy to realize interconnection and intercommunication, and can Avoid purchasing different videoconferencing terminals to support videoconferencing systems with different physical lines, in order to save costs and facilitate maintenance.

Description of drawings

FIG. 1 is a structural diagram of a video conference terminal supporting multiple protocols according to the present invention.

Fig. 2 is a flow chart of the video conference terminal method supporting multiple protocols according to the present invention.

Detailed ways

The present invention will be further described below in conjunction with specific embodiment:

In the field of video conference terminals, the method of the present invention realizes the simultaneous support of E1 line (H.320 protocol), IP line (H.323 protocol) and other types of line protocols in one video conference terminal.

The following takes E1 line (H.320 protocol) and IP line (H.323 protocol) as examples for specific description. Since the circuit function modules to be realized by these different protocols are mostly the same, they all need video input and output modules, audio input and output modules, and central processing unit modules. The difference between them is that the H.320 protocol requires another line interface. circuit board, while the H.323 protocol requires an Ethernet interface module. Like this, according to accompanying drawing 1, these identical and different modules are all integrated on a terminal circuit board, have realized the necessary hardware of these two kinds of agreements, wherein select E1 interface circuit to connect through FPGA (field programmable logic array) On the PCI bus, the interface circuit of ISDN is not selected for use (different places from the accompanying drawing 1). And two sets of terminal software supporting these two lines are stored in two fixed positions in the flash memory module respectively, and an address space of 5 megabytes is allocated respectively, and a 16-bit flag is stored in a fixed address in the flash memory module, In this way, the flag bit is changed through the selection of the interface, and the H323 or H320 protocol program is selected to start. In this way, the two mainstream protocols are realized in one videoconferencing terminal.

When the videoconferencing terminal needs to switch between multiple protocols in actual use, the advantage of the configurable interface of the videoconferencing terminal can be used, and the user can operate through a friendly interface to select the protocol program to start next time. At this time, the interface can change the flag bit of the flash memory module to the value corresponding to the protocol program according to the customer's requirements. In this way, the startup program will start different protocol programs according to this flag when it is started next time.

Fig. 1 shows the structural diagram of the video conference terminal supporting multiple protocols constructed by the present invention, in this figure, including three identical central processing units (CPU1, CPU2, CPU3) modules, two video interface modules (responsible for video input and output), an audio DSP module (responsible for audio codec), an audio interface module (responsible for audio input and output), a control module and a flash memory module (responsible for storing software). These modules are basic modules that all videoconferencing terminals of various protocols must have. The connection relationship of each module is as follows: two identical video interface modules are respectively connected to the two processor modules of the first central processing unit (CPU1) and the second central processing unit (CPU2) to complete the input and output of two channels of video The audio DSP module is connected to the third central processing unit (CPU3) module, and the audio interface module is connected with the audio DSP module simultaneously to complete audio processing, input and output functions; three CPU modules are connected to work together on a PCI bus At the same time, a control module and a flash memory module are connected to the PCI bus through the XIO bus to complete the control function of the internal circuit and realize some external interface controls. The video conferencing terminal constructed by the present invention also includes an E1 line or an ISDN line interface module (H.320 protocol module) and an Ethernet interface module (H.323 protocol module), and the circuit modules of these two different protocols all pass through the PCI bus It is connected with the CPU module, so that each module is connected together through the PCI bus standard, and can realize mutual cooperation. In fact, in the case that there are interface modules of other protocols, it is also possible to realize the cooperative work in the same video conferencing terminal in the same way.

To realize the multi-protocol conference TV terminal also needs software support. The software of the video conference terminal is mainly stored in a flash memory module in the terminal hardware circuit. When the TV conference terminal is just powered on, the internal hardware circuit will automatically download the program stored in the flash memory module to the external memory of the central processing unit module according to the boot program, so that the program can run in the central processing unit module. Since the capacity of the flash memory module of the videoconferencing terminal is relatively large, software of different protocols can be stored in different address spaces of a flash memory module. At the same time, a 16-bit flag is stored in a section of address of the flash memory module (According to the difference of the working mode of the flash memory module, you can choose to occupy 8 bits and occupy 32 bit flags), so that the boot program can guide various protocol software according to the different values of the flags. According to this idea, the present invention proposes a method for supporting a multi-protocol video conference terminal, which mainly includes the following steps:

Step 1: Write corresponding multiple sets of terminal programs for various protocols, and store these different programs in a flash memory module of the video conference terminal hardware by sending commands to the flash memory module, and allocate fixed address spaces in the flash memory modules to store. Specifically, if the H.320 program has 4 megabytes and the H.323 program has 5 megabytes, you can store the H.320 program in 1 to 5 megabytes of the flash memory module, and 5 to 10 megabytes space to store H.323 programs;

Step 2: When the hardware is first powered on, the boot program automatically checks this flag. If the 16-bit flag is the set value, the startup program automatically boots a protocol program. When the flag is another When a set value is set, the startup program guides another protocol program; this flag is defined as other values, which can expand other protocol programs;

Step 3: Change this flag bit through the selection of the interface of each protocol software, select the H.323 or H.320 protocol program to restart.

Claims (4)

1. A conference TV terminal supporting multiple protocols, including three identical central processing modules, two video interface modules, audio digital signal processor modules, audio interface modules, control modules and flash memory modules; the two The video interface module is respectively connected to the first CPU module and the second CPU module to complete the input and output of two-way video; the audio digital signal processor module is connected to the third CPU The module is connected with the audio interface module at the same time to complete the functions of audio processing, input and output; three central processing modules are connected to work together on a peripheral device interconnection bus; the control module and the flash memory module The extended input and output bus supported by the central processing unit is connected to the interconnection bus of peripheral devices to complete the control function of the internal circuit and realize some external interface control. It is characterized in that it also includes E1 lines, V.35 lines or ISDN lines. Interface module, Ethernet interface module and H.324 protocol line interface module, above-mentioned interface module is connected with described three CPU modules through peripheral device interconnection bus, so that each module is connected together through peripheral device interconnection bus, To achieve mutual cooperation. 2. The video conferencing terminal supporting multiple protocols according to claim 1, wherein the E1 line or ISDN line interface module supports the H.320 protocol, and the Ethernet interface module supports the H.323 protocol. 3. The video conference terminal supporting multiple protocols according to claim 1, wherein the E1 line is connected to the peripheral device interconnection bus through a field programmable logic array. 4. A method for a videoconferencing terminal supporting multiple protocols, comprising the following steps: Step 1: storing multiple sets of terminal protocol programs corresponding to multiple protocols in the flash memory module of the video conference terminal, and assigning fixed address spaces respectively in the flash memory module, and setting flag bits; Step 2: Power on the videoconferencing terminal, the boot program automatically checks the flag, if the flag is a set value, the boot program automatically guides a terminal protocol program; if the flag is another When the value is set, the boot program automatically guides another terminal protocol program; if the flag is defined as other set values, it can be extended to an H.324 protocol program; Step 3: Change the flag bit by selecting the interface of each protocol software, select H.323 protocol program, H.320 protocol program or H.324 protocol program to restart.

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