CN100561460C - Multimedia overhead projector instrument switched system based on computer network - Google Patents

Multimedia overhead projector instrument switched system based on computer network Download PDF

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CN100561460C
CN100561460C CNB031352022A CN03135202A CN100561460C CN 100561460 C CN100561460 C CN 100561460C CN B031352022 A CNB031352022 A CN B031352022A CN 03135202 A CN03135202 A CN 03135202A CN 100561460 C CN100561460 C CN 100561460C
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media signal
main frame
slave
machine
computer network
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CN1460942A (en
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王国胤
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Chongqing University of Post and Telecommunications
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Chongqing University of Post and Telecommunications
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Abstract

The invention discloses a kind of multimedia overhead projector instrument switched system based on computer network, it includes main frame switched system and slave communication system; The main frame switched system comprises: the multi-media signal selective system; The multi-media signal system ensemble; The multi-media signal output system; The slave communication system comprises: the multimedia signal acquisition system; The multi-media signal output system.Adopt technical scheme of the present invention, can realize that signal switches more flexibly, incoming line way and output line way are unrestricted; Can the edit of multimedia signal, multichannel is imported multi-media signal synthesize one tunnel output, project on the projection screen by same projector; 10% of the not enough traditional switch of cost; Volume is little; Handoff procedure does not have signal attenuation; Flexible operation, the reliability height.

Description

Multimedia overhead projector instrument switched system based on computer network
Technical field
The present invention relates to a kind of multi-media signal switched system, specifically, relate to a kind of multimedia overhead projector instrument switched system based on computer network.
Background technology
In recent years, the application of giant-screen digital projector is universal day by day.It both can the projection audio-visual equipment composite video signal of output, figure, image that again can the output of projection computing machine.Yet, projector only disposes 1 or 2 computing machine input port at random, often need switch the application scenario of 2 above computing machine output signals of projection at any time to those, just can only lean on artificial plug cable to reach the purpose of switching the projection information source, perhaps adopt multimedia overhead projector instrument switch to switch the projection information source.
All in the world multimedia overhead projector instrument switchs all are the hardware switchs of physics at present, as U.S. VIDEO TECHNOLOGY, VS series switch device and the serial matrix switcher of VX that INC company produces, SW series of signals switch that permanent industry Electron Technology Co., Ltd of Beijing million sections produces and MT series crosspoint matrix signal shifter, above-mentioned switch can realize that 4 advance 1 and go out to advance 16 signals that go out to 16 and switch, and its course of work is referring to Fig. 1.
A kind of distance type multimedia overhead projector instrument input signal switch of Nanjing Institute of Meteorology's development, only be to change the signal input line of switch into the infrared ray connected mode from the wired connection mode with the difference of above-mentioned switch, its principle of work does not change, and its course of work is referring to Fig. 2.
The defective of above-mentioned switch is: 1, the input of switch, outlet line quantity are extremely limited, cost an arm and a leg, increase along with input, outlet line quantity, the price of switch sharply increases, like U.S. VIDEO TECHNOLOGY, the serial matrix switcher of VX that INC company produces, its price may be up to 148000 yuan; 2, signal may be decayed in handoff procedure; 3, switch is bulky; 4, need operation-control switch, use inconvenient.
Summary of the invention
At the deficiency of above-mentioned hardware multimedia overhead projector instrument switch, the invention provides a kind of multimedia overhead projector instrument switched system based on computer network, this system is software systems.Based on the course of work of the multimedia overhead projector instrument switched system of computer network as shown in Figure 3, be connected by multimedia overhead projector instrument switched system between the computing machine and between computing machine and the projector based on computer network.
A kind of multimedia overhead projector instrument switched system based on computer network, this system includes main frame switched system and slave communication system;
Described main frame switched system comprises:
Multi-media signal selective system (or being called the multi-media signal exchange system), this system's realization main frame is communicated by letter with slave, gathers this machine multi-media signal, obtains the multi-media signal of slave or the multi-media signal of other main frame by computer network;
The multi-media signal system ensemble, this system is with the comprehensive one-tenth of multichannel multi-media signal one road multi-media signal;
The multi-media signal output system, this system outputs to projector by the computer hardware communication interface with multi-media signal;
Described slave switched system comprises:
Multimedia signal acquisition module, this module are gathered the multi-media signal of this machine and other computing machine;
The multi-media signal output module, this module is sent to other computing machine with the multi-media signal that collects by computer network.
Adopt the technical scheme of the multimedia overhead projector instrument switched system based on computer network of the present invention, substituted former hardware switch, can realize that signal switches more flexibly, incoming line way and output line way are unrestricted; Can the edit of multimedia signal, multichannel is imported multi-media signal synthesize one tunnel output, project on the projection screen by same projector; 10% of the not enough traditional switch of cost; Volume is little; Handoff procedure does not have signal attenuation; Flexible operation, the reliability height.
Description of drawings
Fig. 1 is the work synoptic diagram of conventional projector switch;
Fig. 2 is the work synoptic diagram of distance type multimedia overhead projector instrument input signal projector;
Fig. 3 is the work synoptic diagram based on the projector switch of computer network;
Fig. 4 is the structured flowchart that has the main frame switched system of signal synthesis system;
Fig. 5 is the structured flowchart of the main frame switched system of not band signal system ensemble;
Fig. 6 is the structured flowchart that has the slave communication system of signal synthesis system;
Fig. 7 is the structured flowchart of the slave communication system of not band signal system ensemble.
Embodiment
Embodiment 1: a kind of multimedia overhead projector instrument switched system based on computer network, this system includes main frame switched system and slave communication system.
Described main frame switched system comprises: the multi-media signal selective system; The multi-media signal system ensemble; The multi-media signal output system.
Described slave communication system comprises: the multimedia signal acquisition module; The multi-media signal output module.
Said system is software systems, and this system can comprise many main frames and Duo Tai computing machine slave, and main frame and slave all can obtain multi-media signal by any computing machine from system.
In this system, multi-media signal selective system realization main frame is communicated by letter, is gathered this machine multi-media signal, obtains the multi-media signal of slave or the multi-media signal of other main frame by computer network with slave; The multi-media signal system ensemble is with the comprehensive one-tenth of multichannel multi-media signal one road multi-media signal; The multi-media signal output system outputs to projector by the computer hardware communication interface with multi-media signal; The multimedia signal acquisition module is gathered the multi-media signal of this machine or other computing machine; The multi-media signal output module is sent to other computing machine with the multi-media signal that collects by computer network.
The computer hardware communication interface that jointly multi-media signal is sent to projector with the multi-media signal output system is the display card on the common computer, also alternative display cards such as serial port, parallel port, USB interface, PCI plug-in card can be installed on computers;
The working method of this system (control method) has host computer control type and initiatively transmission type of slave.
The host computer control type comprises following job step:
(1) main frame determines to switch to the multi-media signal source machine of projecting apparatus screen by the request of operator's control or response slave;
(2) main frame connects by computer network and the communication of signal source computing machine;
(3) slave multimedia signal acquisition module is gathered this machine multi-media signal and multi-media signal is transported to this machine multi-media signal output module;
(4) slave multi-media signal output module sends to multi-media signal the multi-media signal selective system of main frame by computer network;
(5) multi-media signal and the slave multi-media signal of other main frame of receiving with this machine multi-media signal, by computer network of main frame multi-media signal selective system are sent into this machine multi-media signal system ensemble;
(6) main frame multi-media signal system ensemble comprehensively is one road multi-media signal and this machine of input multi-media signal output system with each road multi-media signal;
(7) main frame multi-media signal output system outputs to projector with multi-media signal by this machine hardware communication interface;
(8) finish, cut off the connection of intercomputer.
Initiatively transmission type of slave comprises following job step:
(1) slave sends connection request with main frame by computer network;
(2) connect between slave and main frame;
(3) slave multimedia signal acquisition module is gathered this machine multi-media signal and this machine of being sent to multi-media signal output module;
(4) slave multi-media signal output module sends to multi-media signal the multi-media signal selective system of main frame by computer network;
(5) multi-media signal and the slave multi-media signal of other main frame of receiving with this machine multi-media signal, by computer network of main frame multi-media signal selective system are sent into this machine multi-media signal system ensemble;
(6) main frame multi-media signal system ensemble comprehensively is one road multi-media signal and this machine of input multi-media signal output system with each road multi-media signal;
(7) main frame multi-media signal output system outputs to projector with multi-media signal by this machine hardware communication interface;
(8) finish, slave cuts off with main frame and is connected.
Embodiment 2: a kind of multimedia overhead projector instrument switched system based on computer network, and this system includes main frame switched system and slave communication system;
Described main frame switched system comprises: the multi-media signal selective system; The multi-media signal output system.
Described slave communication system comprises: the multimedia signal acquisition module; The multi-media signal system ensemble; The multi-media signal output module.
As different from Example 1, the multi-media signal system ensemble is installed on the slave communication system.
The working method of said system also comprises host computer control type and slave active request type.
The host computer control type comprises following job step:
(1) main frame determines to switch to the multi-media signal source machine of projecting apparatus screen by the request of operator's control or response slave;
(2) main frame connects by computer network and the communication of signal source computing machine;
(3) slave multimedia signal acquisition module is gathered the multi-media signal of this machine or other computing machine;
(4) slave is sent the multi-media signal that collects into this machine multi-media signal system ensemble;
(5) slave multi-media signal system ensemble comprehensively is one road multi-media signal and this machine of being sent to multi-media signal output module with each road multi-media signal;
(6) slave multi-media signal output module is transported to multi-media signal the multi-media signal selective system of main frame;
(7) main frame multi-media signal selective system is transported to this machine multi-media signal output system with the multi-media signal that receives;
(8) main frame multi-media signal output system outputs to projector with multi-media signal by this machine hardware communication interface;
(9) finish, cut off the connection of intercomputer.
Initiatively transmission type of slave comprises following job step:
(1) slave sends connection request with main frame by computer network;
(2) connect between slave and main frame;
(3) slave multimedia signal acquisition module is gathered the multi-media signal of this machine or other computing machine;
(4) slave is sent the multi-media signal that collects into this machine multi-media signal system ensemble;
(5) slave multi-media signal system ensemble comprehensively is one road multi-media signal and this machine of being transported to multi-media signal output module with each road multi-media signal;
(6) slave multi-media signal output module sends to multi-media signal the multi-media signal selective system of main frame by computer network;
(7) main frame multi-media signal selective system is transported to this machine multi-media signal output system with the multi-media signal that receives;
(8) main frame multi-media signal output system outputs to projector with multi-media signal by the computer hardware communication interface;
(9) finish, slave cuts off with main frame and is connected.
Embodiment 3: a kind of multimedia overhead projector instrument switched system based on computer network, and this system includes main frame switched system and slave communication system;
Described main frame switched system comprises: the multi-media signal selective system; The multi-media signal system ensemble; The multi-media signal output system.
Described slave communication system comprises: the multimedia signal acquisition module; The multi-media signal system ensemble; The multi-media signal output module.
In the present embodiment, main frame switched system and slave communication system all are equipped with the multi-media signal system ensemble.Promptly on the basis of embodiment 1, in the slave communication system, increased the multi-media signal system ensemble.
The working method of said system comprises host computer control type and initiatively transmission type of slave:
The host computer control type may further comprise the steps:
(1) main frame determines to switch to the multi-media signal source machine of projecting apparatus screen by the request of operator's control or response slave;
(2) main frame connects by computer network and the communication of signal source computing machine;
(3) slave multimedia signal acquisition module is gathered the multi-media signal of this machine or other computing machine;
(4) slave is sent the multi-media signal that collects into this machine multi-media signal system ensemble;
(5) slave multi-media signal system ensemble comprehensively is that one road multi-media signal and this machine multimedia of being transported to are sold output module with each road multi-media signal;
(6) slave multi-media signal output module outputs to multi-media signal the multi-media signal selective system of main frame;
(7) multi-media signal and the slave multi-media signal of main frame multi-media signal selective system this machine multi-media signal that will collect, other main frame of receiving by computer network are sent into this machine multi-media signal system ensemble;
(8) main frame multi-media signal system ensemble comprehensively is one road multi-media signal and this machine of being sent to multi-media signal output system with each road multi-media signal;
(9) main frame multi-media signal output system outputs to projector with multi-media signal by this machine hardware communication interface;
(10) finish, cut off the connection of intercomputer.
Initiatively transmission type of slave comprises following job step:
(1) slave sends connection request with main frame by computer network;
(2) connect between slave and main frame;
(3) slave multimedia signal acquisition module is gathered the multi-media signal of this machine and other computing machine;
(4) slave is sent the multi-media signal that collects into this machine multi-media signal system ensemble;
(5) slave multi-media signal system ensemble comprehensively is one road multi-media signal and this machine of being sent to multi-media signal output module with each road multi-media signal;
(6) slave multi-media signal output module is transported to multi-media signal the multi-media signal selective system of main frame;
(7) multi-media signal and the slave multi-media signal of main frame multi-media signal selective system this machine multi-media signal that will collect, other main frame of receiving by computer network are sent into this machine multi-media signal system ensemble;
(8) main frame multi-media signal system ensemble comprehensively is one road multi-media signal and this machine of being sent to multi-media signal output system with each road multi-media signal;
(9) main frame multi-media signal output system outputs to projector with multi-media signal by this machine hardware communication interface;
(10) finish, slave cuts off with main frame and is connected.

Claims (9)

1, a kind of multimedia overhead projector instrument switched system based on computer network, it is characterized in that: this system includes main frame switched system and slave communication system;
Described main frame switched system comprises:
The multi-media signal selective system, this system's realization main frame is communicated by letter with slave, gathers this machine multi-media signal, obtains the multi-media signal of slave or the multi-media signal of other main frame by computer network;
The multi-media signal system ensemble, this system is with the comprehensive one-tenth of multichannel multi-media signal one road multi-media signal;
The multi-media signal output system, this system outputs to projector by the computer hardware communication interface with multi-media signal;
Described slave communication system comprises:
Multimedia signal acquisition module, this module are gathered the multi-media signal of this machine or are received the multi-media signal of other computing machine by computer network;
The multi-media signal output module, this module is sent to other computing machine with multi-media signal by computer network.
2, a kind of control method of the multimedia overhead projector instrument switched system based on computer network is characterized in that:
(1) main frame determines to switch to the multi-media signal source machine of projecting apparatus screen by the request of operator's control or response slave;
(2) main frame connects by computer network and the communication of signal source computing machine;
(3) slave multimedia signal acquisition module is gathered this machine multi-media signal and multi-media signal is sent to this machine multi-media signal output module;
(4) slave multi-media signal output module sends to multi-media signal the multi-media signal selective system of main frame by computer network;
(5) multi-media signal and the slave multi-media signal of other main frame of receiving with this machine multi-media signal, by computer network of main frame multi-media signal selective system are sent into the multi-media signal system ensemble;
(6) main frame multi-media signal system ensemble comprehensively is one road multi-media signal and this machine of being sent to multi-media signal output system with each road multi-media signal;
(7) main frame multi-media signal output system outputs to projector with multi-media signal by this machine hardware communication interface;
(8) finish, cut off the connection of intercomputer.
3, a kind of control method of the multimedia overhead projector instrument switched system based on computer network is characterized in that:
(1) slave sends connection request with main frame by computer network;
(2) connect between slave and main frame;
(3) slave multimedia signal acquisition module is gathered this machine multi-media signal and multi-media signal is sent to this machine multi-media signal output module;
(4) slave multi-media signal output system sends to main frame multi-media signal selective system with multi-media signal by computer network;
(5) multi-media signal and the slave multi-media signal of main frame multi-media signal selective system this machine multi-media signal that will collect, other main frame of receiving by computer network are sent into this machine multi-media signal system ensemble;
(6) main frame multi-media signal system ensemble comprehensively is one road multi-media signal and this machine of being sent to multi-media signal output system with each road multi-media signal;
(7) main frame multi-media signal output system outputs to projector with multi-media signal by this machine hardware communication interface;
(8) finish, slave cuts off with main frame and is connected.
4, a kind of multimedia overhead projector instrument switched system based on computer network, it is characterized in that: this system includes main frame switched system and slave communication system,
Described main frame switched system comprises:
The multi-media signal selective system; The multi-media signal output system;
Described slave communication system comprises:
The multimedia signal acquisition module; The multi-media signal system ensemble; The multi-media signal output module.
5, a kind of control method of the multimedia overhead projector instrument switched system based on computer network is characterized in that:
(1) main frame determines to switch to the multi-media signal source machine of projecting apparatus screen by the request of operator's control or response slave;
(2) main frame connects by computer network and the communication of signal source computing machine;
(3) slave multimedia signal acquisition module is gathered the multi-media signal of this machine or other computing machine;
(4) slave is sent the multi-media signal that collects into this machine multi-media signal system ensemble;
(5) slave multi-media signal system ensemble comprehensively is one road multi-media signal and this machine of being sent to multi-media signal output module with each road multi-media signal;
(6) slave multi-media signal output module outputs to multi-media signal the multi-media signal selective system of main frame;
(7) main frame multi-media signal selective system is transported to this machine multi-media signal output system with the multi-media signal that receives;
(8) main frame multi-media signal output system is transported to projector with multi-media signal by this machine hardware communication interface;
(9) finish, cut off the connection of intercomputer.
6, a kind of control method of the multimedia overhead projector instrument switched system based on computer network is characterized in that:
(1) slave sends connection request with main frame by computer network;
(2) connect between slave and main frame;
(3) slave multimedia signal acquisition module is gathered the multi-media signal of this machine or other computing machine;
(4) slave is sent the multi-media signal that collects into the multi-media signal system ensemble;
(5) slave multi-media signal system ensemble comprehensively is one road multi-media signal and this machine of being sent to multi-media signal output module with each road multi-media signal;
(6) slave multi-media signal output module is transported to multi-media signal the multi-media signal selective system of main frame by computer network;
(7) main frame multi-media signal selective system is transported to this machine multi-media signal output system with the multi-media signal that receives;
(8) main frame multi-media signal output system outputs to projector with multi-media signal by this machine hardware communication interface;
(9) finish, slave cuts off with main frame and is connected.
7, a kind of multimedia overhead projector instrument switched system based on computer network according to claim 1 is characterized in that: in the slave communication system, increase a multi-media signal system ensemble, that is,
Described main frame switched system comprises:
The multi-media signal selective system; The multi-media signal system ensemble; The multi-media signal output system;
Described slave communication system comprises:
The multimedia signal acquisition module; The multi-media signal system ensemble; The multi-media signal output module.
8, a kind of control method of the multimedia overhead projector instrument switched system based on computer network is characterized in that:
(1) main frame determines to switch to the multi-media signal source machine of projecting apparatus screen by the request of operator's control or response slave;
(2) main frame connects by computer network and the communication of signal source computing machine;
(3) slave multimedia signal acquisition module is gathered the multi-media signal of this machine or other computing machine;
(4) slave is sent the multi-media signal that collects into this machine multi-media signal system ensemble;
(5) slave multi-media signal system ensemble comprehensively is one road multi-media signal and this machine of being sent to multi-media signal output module with each road multi-media signal;
(6) slave multi-media signal output module is transported to multi-media signal the multi-media signal selective system of main frame;
(7) multi-media signal and the slave multi-media signal of main frame multi-media signal selective system this machine multi-media signal that will collect, other main frame of receiving by computer network are sent into the multi-media signal system ensemble;
(8) main frame multi-media signal system ensemble comprehensively is one road multi-media signal and this machine of being sent to multi-media signal output system with each road multi-media signal;
(9) main frame multi-media signal output system outputs to projector with multi-media signal by this machine hardware communication interface;
(10) finish, cut off the connection of intercomputer.
9, a kind of control method of the multimedia overhead projector instrument switched system based on computer network is characterized in that:
(1) slave sends connection request with main frame by computer network;
(2) connect between slave and main frame;
(3) slave multimedia signal acquisition module is gathered the multi-media signal of this machine and other computing machine;
(4) slave is sent the multi-media signal that collects into this machine multi-media signal system ensemble;
(5) slave multi-media signal system ensemble comprehensively is one road multi-media signal and this machine of being sent to multi-media signal output module with each road multi-media signal;
(6) slave multi-media signal output module is transported to multi-media signal the multi-media signal selective system of main frame;
(7) multi-media signal and the slave multi-media signal of main frame multi-media signal selective system this machine multi-media signal that will collect, other main frame of receiving by computer network are sent into this machine multi-media signal system ensemble;
(8) main frame multi-media signal system ensemble comprehensively is one road multi-media signal and this machine of being sent to multi-media signal output system with each road multi-media signal;
(9) main frame multi-media signal output system outputs to projector with multi-media signal by this machine hardware communication interface;
(10) finish, slave cuts off with main frame and is connected.
CNB031352022A 2003-06-13 2003-06-13 Multimedia overhead projector instrument switched system based on computer network Expired - Fee Related CN100561460C (en)

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