CN201436812U

CN201436812U - Video matrix switching device

Info

Publication number: CN201436812U
Application number: CN2009200763801U
Authority: CN
Inventors: 龚兆岗; 黄维; 任领美; 段菲
Original assignee: SHANGHAI BRIGHT ELECTRONIC SYSTEMS Ltd; Shanghai Maritime University
Current assignee: SHANGHAI BRIGHT ELECTRONIC SYSTEMS Ltd; Shanghai Maritime University
Priority date: 2009-06-16
Filing date: 2009-06-16
Publication date: 2010-04-07
Anticipated expiration: 2019-06-16

Abstract

The utility model discloses a video matrix switching device, especially a video switching control system having Ethernet interface; the module comprises a single chip microcomputer processing module, a video matrix switching module, a video inputting module and a video outputting module; the system also has a Ethernet interface. The video matrix switching module can be controlled by an upper control equipment (such as PC) by the Ethernet interface to perform a series of visual switching operations; thereby, the visualizability, flexibility and stability of the operation are improved.

Description

A kind of video matrix switcher

Technical field:

The utility model relates to a kind of handoff technique of video matrix, is specially the device that can carry out switching controls by Ethernet interface to video.

Background technology:

Perfect day by day along with digital monitor system particularly to comprehensive control of switching matrix, really promotes the process of matrix system digitlization and networking.The conventional video matrix switches the serial communications such as RS232, RS422 of using more, realizes and the communicating by letter of upper control appliance, thereby finishes the switching of control of video matrix.The transmission range of such control model is limited, and transmission rate is low.And patent No. ZL200620109058.0 " a kind of audio and video matrix handover control system " with ethernet module function, though related to the application of Ethernet interface among this system, but it mainly is to finish the encoding and decoding of video/audio and the video/audio of handling well is sent on the display device by Ethernet, is how to the introduction of video matrix switching controls but do not relate to.

The utility model content:

At the deficiency of above-mentioned technology, the purpose of this utility model aims to provide a kind of Ethernet interface that has, and can make the upper control appliance carry out device for switching to video matrix by Ethernet.

The problem that the utility model solved can realize by the following technical solutions:

This kind video matrix switcher comprises single chip processing module, video matrix handover module, video input module, video output module; Described single chip processing module (available single-chip microcomputer replacement) is connected with the video matrix handover module, and described video matrix handover module is connected with video input module, video output module respectively; Described video output module connects monitor; It is characterized in that described device also is provided with ethernet interface module, make upper control appliance utilization transmit control signal and finish and the communicating by letter of single chip processing module by ethernet interface module; Described single chip processing module is handled the video matrix handover module accordingly according to these signals, thereby finishes visual video matrix handover operation.

Described ethernet interface module adopts the ICP/IP protocol communication, can accept the control command that remote control terminal is sent, and control command is sent to single chip processing module, thereby realize the switching of long-range upper control appliance to video matrix.

Video matrix switcher described in the utility model, the control signal of upper control appliance is passed through Ethernet interface, be sent to single chip control module, and the video matrix handover module operated, therefore the novel video matrix switcher of this kind can be considered as a kind of application of using Ethernet to finish transmission and reception.So just do not need to connect for upper control signal is sent to single chip control module again communication line, also need specially upper control appliance be set in order to realize the transmission of standard RS_232 and RS_485 bus data.

Description of drawings:

Further specify the utility model below in conjunction with the drawings and specific embodiments.

Fig. 1 is an overall structure schematic block diagram of the present utility model;

Fig. 2,3,4 is a video switch control circuit schematic diagram of the present utility model;

Fig. 5 is a Network Interface Module physical circuit schematic diagram of the present utility model.

Embodiment:

For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.

Referring to Fig. 1, ethernet interface module 2 is connected with single chip processing module 1, monolithic processing module 1 is connected with video matrix handover module 4, the input port of video matrix handover module 4 is connected with video input module 3, and the output port of video matrix handover module 4 is connected with video output module 5.

By ethernet interface module 2, finish communicating by letter between upper control signal and the single chip processing module 1.

Upper control appliance, by ethernet interface module 2, the input that the video matrix that will select switches and the signal of output channel send in the single chip processing module 1, according to these signals video matrix handover module 4 is carried out control corresponding and operation by single chip processing module 1 again, make video matrix handover module 4 carry out corresponding operating to video input module 3, video output module 5, finish the switching of video matrix according to the control command of single chip processing module 1.

The utility model focuses on tells about a kind of video matrix switcher, focuses on the transmission of bit instruction and the control that video matrix switches, and does not therefore do detailed description for video input module 3, video output module 5.

Referring to Fig. 2, Fig. 3 and Fig. 4, it is AD8117 that video matrix switches chip 15, and it is the single-chip microcomputer 10 that 89C55WD carries the watchdog module mouth that video matrix switches chip 15 connection models, and by IO extended chip 11 8255 its IO mouths of expansion.

The single-chip microcomputer 10 that carries watchdog module connects IO extended chip 11, address latch chip 12, programming device 13, external data memory 14, video matrix handover module 15 respectively.

Referring to Fig. 5, ethernet interface module 2 comprises that ethernet control chip 16, separation filter 17 and " plug and play " are provided with chip 18, Ethernet RJ-45 interface 19.

Referring to Fig. 2, P0.0～P0.7 the mouth that carries the single-chip microcomputer 10 of watchdog module links to each other with the D0～D7 mouth of IO extended chip 11, and the RET/VPD of single-chip microcomputer 10, WR/3.6, RD/3.7, P1.6 link to each other with RESET, WR, RD, the CE pin of IO extended chip 11 respectively, and the P2.6 of single-chip microcomputer 10, P2.7 link to each other with A0, the A1 pin of IO extended chip 11 respectively.Thereby realize IO mouth expansion for single-chip microcomputer 10.

Referring to Fig. 2, Fig. 3, Fig. 4, Fig. 5, P1.0～P1.5 the mouth that carries the single-chip microcomputer 10 of watchdog module links to each other with SER/PAR, UPDATE, DATA IN, CLK, WE, the RESET pin that video matrix switches chip 15, and the control signal of video matrix being switched chip 15 is provided;

Single-chip microcomputer 10 links to each other with the D0～D5 pin of video matrix switching chip 15 respectively by the PA0～PA5 mouth of IO extended chip 11 expansions, single-chip microcomputer 10 links to each other with A0～A4 that video matrix switches chip 15 by the PB0～PB4 mouth of IO extended chip 11 expansions, finishes the input of data under the parallel switch mode.According to the configuration requirement of video matrix switching chip 15, require 32 tunnel inputs of video matrix switching chip 15 when system design and 32 tunnel outputs all must connect a resistance.Host computer is finished by the DM9008 chip by communicating between ethernet interface module 2 and the video switching matrix.

Address latch chip 12 is 8D latchs, and D0～D7 links to each other with the PC0～PC7 mouth of single-chip microcomputer 10 by 11 expansions of IO extended chip respectively.

When the single-chip microcomputer 10 that carries watchdog module was read and write external memory storages, the least-significant byte address signal was latched, because the OE input low level, Q0～Q7 directly exports the least-significant byte control signal; In order to reach the expansion requirement, the utility model has used external data memory 14 to expand, and external data memory 14 is 32K*8SRAM chips.

Referring to Fig. 2, Fig. 3, Fig. 4 and Fig. 5, the address wire of external data memory 14 links to each other with the address wire A0～A14 that expands the single-chip microcomputer 10 of IO mouths via IO extended chip 11, data wire D0～D7 links to each other with PC0～PC7 mouth that single-chip microcomputer 10 is expanded by IO extended chip 11 and writes or sense data, reading enable line RD links to each other with the external memory storage control line RD that reads of ethernet control chip 16, when RD was effective, the program of specified address was read out; WE line WR links to each other with the external memory storage control line WR that writes of ethernet control chip 16.When WR was effective, data were written to the address of appointment, were used for the clock signal input terminal of programming device 13 via the address wire A15 of the single-chip microcomputer 10 of IO extended chip 11 expansion IO mouths expansion; Single-chip microcomputer 10 provides functionality, network interface by ethernet control chip 16.

Least-significant byte SD0～the SD7 of ethernet control chip 16 data/address buss links to each other with 8 bit data bus D0～D7 of single-chip microcomputer 10, and the floating sky of most-significant byte data/address bus SD8～SD15 does not use.Low five SA0～SA4 of ethernet control chip 16 address buss hang down 5 A0～A4 with the address bus of single-chip microcomputer 10 after address latch chip 12 latchs and are connected, the whole ground connection of the SA5～SA8 of ethernet control chip 16, SA9 connects high level, the also whole ground connection of SA10～SA19, the I/O plot that can obtain ethernet control chip 16 like this is 200H.

The address enable signal AEN of ethernet control chip 16 is produced by 13 decoding backs during able to programme by the address bus of single-chip microcomputer 10, and will be connected to the external interrupt pin of single-chip microcomputer 10 after the ethernet control chip 16 interruption output IRQ10 negates.

In addition, the reset pin RST of ethernet control chip 16 links to each other with the reset pin of the single-chip microcomputer 10 that carries watchdog module, when powering on, makes single-chip microcomputer 10 reliable reset.The data transmission of ethernet control chip 16, reception pin TPTX-, TPTX+, TPRX-, TPRX+ link to each other with Ethernet RJ45 socket 19 by separation filter 17, the IO16 pin that is used for the operation of 16 bit data in the ethernet control chip 16 is floating empty, and MEMR, the MEMW and the SMEMR that are used for memory read/write also can float sky.Configuring chip " plug and play " configuring chip 18 can pass through EECS, EEDI, EEDO and EECK and be connected with ethernet control chip 16, and " plug and play " configuring chip 18 provides the physical address and the data transmission state of ethernet control chip 16 for application system.Single-chip microcomputer 10 uses separate crystal oscillator with ethernet control chip 16.

During the utility model work, upper control appliance is with control command, by Ethernet RJ45 interface 19, through separation filter 17, be transferred to ethernet control chip 16, ethernet control chip will send this order to single-chip microcomputer 10 according to ICP/IP protocol, switch chip 15 by monolithic according to this order control of video matrix again, finish corresponding video switch.

The employed single-chip microcomputer 10 of the utility model adopts 89C55WD, and IO extended chip 11 adopts 8255.That address latch chip 12 adopts is SN74F573, and that programming device 13 adopts is GAL16V8B, and external data memory 14 adopts CY7C199, and video matrix switches chip 15 and adopts AD8117.That Ethernet interface 19 adopts is RJ45.Ethernet control chip 16 adopts DM9008F.Separation filter 17 between ethernet control chip 16 and Ethernet interface 19 adopts LANF7236.

In other is implemented, can replace with other electronic devices or the circuit of equal effect, also can obtain identical effect.Ethernet control chip among Fig. 4 also can adopt DM9008 or CS8900A; Master controller also can be selected single-chip microcomputer P87C591 for use

More than show and described basic principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims

1. a video matrix switcher comprises single chip processing module, video matrix handover module, video input module, video output module; Described single chip processing module is connected with the video matrix handover module, and described video matrix handover module is connected with video input module, video output module respectively; Described video output module connects monitor; It is characterized in that described device also is provided with ethernet interface module, make upper control appliance utilization transmit control signal and finish and the communicating by letter of single chip processing module by ethernet interface module; Described single chip processing module is handled the video matrix handover module accordingly according to these signals, thereby finishes visual video matrix handover operation.

2. according to the video matrix switcher of claim 1, it is characterized in that, described ethernet interface module adopts the ICP/IP protocol communication, can accept the control command that remote control terminal is sent, and control command is sent to single chip processing module, thereby realizes of the switching of long-range upper control appliance video matrix.