CN102833468B

CN102833468B - Broadcasting PGM (Probabilistic Graphical Model) master-slave output one-click emergency system and method

Info

Publication number: CN102833468B
Application number: CN201210331441.0A
Authority: CN
Inventors: 丁文华; 姚威; 宋宜纯; 宋蔚; 商同; 陈震; 阙晟华; 冯坤; 郭敏; 任林
Original assignee: China Central TV Station; Beijing Dayang Technology Development Inc
Current assignee: China Central TV Station; Beijing Dayang Technology Development Inc
Priority date: 2012-09-10
Filing date: 2012-09-10
Publication date: 2014-03-12
Anticipated expiration: 2032-09-10
Also published as: CN102833468A

Abstract

The invention relates to a broadcasting PGM (Probabilistic Graphical Model) master-slave output one-click emergency system and a broadcasting PGM master-slave output one-click emergency method. The system is of a structure that master and slave program signal links are respectively formed by master and slave broadcast control workstations, master and slave inverters, master and slave video servers, a plurality of video-audio distributors and master and slave switching equipment; and the master and slave program signal links are respectively connected with two input ends of a 2*1 switch arranged on a control panel at the output end of the master switching equipment. According to the invention, a control signal link and the program signal links are adopted; a last-level signal inversion control mode adopted by a conventional broadcasting system is changed; once the abnormal condition of a current link broadcast signal is monitored, the 2*1 switch can be directly inverted to a backup link by the universal control panel; the complex fault judgment process is saved; the working pressure of a broadcasting operator on duty in a television station is reduced; the fault judgment process is simplified; the timely observation and the rapid processing on a fault are implemented; and a broadcasting accident is effectively avoided.

Description

The one-touch emergency system of the active and standby output of a kind of broadcast PGM and method

Technical field

The present invention relates to the one-touch emergency system of the active and standby output of a kind of broadcast PGM and method, is a kind of redundant system of video broadcast system and changing method of redundant system that is applied to computer network.At this, broadcast PGM signal and can be understood as final output signal.

Background technology

Generally, TV station or other video and audio propagation mechanism are when design and building broadcast system, and broadcasting fail safe is very important Consideration.Be mainly reflected in broadcast system and whether adopt complete redundancy backup structure, guarantee that key equipment does not have single routed point; Whether possess the accurate judgement of the system failure and the timely ability of processing.At present, for TV station's broadcast system, conventionally the output of switch between master and slave equipment is from identical broadcasting signal source, although equipment has adopted redundancy backup design, once but there is in essence signal fault, cannot realize the accurate judgement of fault and process in time, although broadcast system is to have complete redundancy backup structure, in assurance system, there is no single routed point, but while breaking down, operator on duty cannot judge concrete fault point fast and accurately, and carries out fast processing for fault, reduces accident to the loss of broadcasting.

At present, for TV station's broadcast system, conventionally the output of switch between master and slave equipment is from identical broadcasting signal source, although equipment has adopted redundancy backup design, but in essence, once there is signal fault, failure judgement point in time processing accurately, cause fault not get rid of in time, thereby long-time impact is broadcasted.Even if therefore broadcast system design will be considered in equipment fault, also within the shortest time, recover normal and broadcast, the impact that accident is brought reduces to minimum.

Summary of the invention

For solving the problem of prior art, the present invention proposes the one-touch emergency system of the active and standby output of a kind of broadcast PGM and method, this system and method is by building the control signal link of a set of active and standby machine multi channel that comprises two negaters, coordinate the programme signal link of double copies and the programme signal source of a plurality of backups, the equipment of realizing is when Single Point of Faliure, without artificial judgment fault point in the situation that, only by simply moving a switch, switch, can skip fast failsafe link, guarantee the broadcast of normal signal.Then, then gone to investigate concrete fault point by technical staff, allow fault incidence taper to minimum.

The object of the present invention is achieved like this: the one-touch emergency system of the active and standby output of a kind of broadcast PGM, described system comprises: the main broadcaster who is connected with outside programme editing station and database thereof is controlled work station and standby Broadcast Control work station, described main broadcaster is controlled work station and by heartbeat communication, is realized synchronizeing of state-detection, Broadcast Control emergency operation between Broadcast Control work station, described standby Broadcast Control work station is provided with GPI board, and described GPI board is connected with the control port of main negater; Described main broadcaster is controlled work station and is connected with standby negater with main negater with standby Broadcast Control work station, and described main negater is connected with the control port of main video server, the control port of main switching device, forms master control link; Described standby Broadcast Control work station is connected with the control port of standby video server, the control port of standby switching device, forms standby control link; Described main switching device and standby switching device are provided with a plurality of inputs, described main switching device is connected with a plurality of AV distributers respectively with each input of standby switching device, has at least one to be connected, to have at least one to be connected, to have at least one to be connected, to have at least one to be connected, to have at least one to be connected, to have at least one to be connected with emergency signal source with reserve line with main line with video tape recorder with standby video server with main video server in described a plurality of AV distributers; Described main video server, main line, a plurality of AV distributer, main switching device form main program signal link, and the output of described main program signal link on main switching device is connected with an input that is arranged on 2 * 1 diverter switches on control panel; Described standby video server, reserve line, a plurality of AV distributer, standby switching device form standby programme signal link, the output of described standby programme signal link on standby switching device is connected with another input of described 2 * 1 diverter switches, and the output of described 2 * 1 diverter switches is connected with outside transmission system.

The one-touch emergency method of the active and standby output of PGM that uses said system, the step of described method is as follows:

Load the step of preset system configuration parameter: for to before described system operation, system is carried out to the configuration of preset parameter, described configuration parameter comprises following three parts:

1) main switching device is cut main program signal link, and standby switching device is cut standby programme signal link;

2) for video server broadcasting signal, for main switching device, the backup source of main video server signal is standby video server signal, and emergent source is emergency signal; For standby switching device, the backup source of standby video server signal is main video server signal, and emergent source is emergency signal;

3), for important line signal, for main switching device, the backup source of main line signal is reserve line signal; For standby switching device, the backup source of reserve line signal is main line signal;

Load the step of broadcasting in advance programme: after receiving the message that loads programme, main broadcaster controls work station and standby Broadcast Control work station loads and broadcasts in advance programme from database;

Below comprise three parallel emergency processing processes of carrying out:

Main broadcaster is controlled the automatic emergency processing procedure between work station and standby Broadcast Control work station:

Main broadcaster is controlled work station and standby Broadcast Control work station by heartbeat detection step: under normal circumstances, described main broadcaster is controlled work station in major state, main broadcaster is controlled work station and is controlled video server, video tape recorder, switching device, according to the program of broadcast items list, broadcast sequential, complete the work of automatic broadcast, described standby Broadcast Control work station is controlled the working condition of work station by heartbeat detection main broadcaster;

Main broadcaster is controlled work station and standby Broadcast Control work station by heartbeat detection step: for controlling work station and occur when abnormal when monitoring main broadcaster for Broadcast Control work station, standby Broadcast Control work station triggers gpi signal, control negater and carry out the switching of control link, the controls metastasis of playing device is to standby Broadcast Control work station, and now standby Broadcast Control work station is in major state;

Automatic emergency processing procedure between main video server and standby video server:

Detect the step of the operating state of video server: whether the state of decoding channels that detects main video server and standby video server for the Broadcast Control work station in major state is abnormal, under normal circumstances, the input of main switching device is main video server signal or main line signal, and the input of standby switching device is standby video server signal, reserve line signal;

Active and standby video server occurs being extremely divided into two kinds of situations, and main video server first occurs that abnormal and standby video server first occurs extremely:

If main video server first occurs extremely:

The emergency processing step of switch between master and slave equipment: for described main switching device, input is switched to standby video server by main video server, the input of described standby switching device remains on standby video server;

Also there is abnormal emergency processing step in standby video server: the input for described main switching device switches to emergency signal, and the input of standby switching device switches to emergency signal;

If standby video server first occurs extremely:

The emergency processing step of switch between master and slave equipment: the input for described main switching device remains on main video server, described standby switching device switches to main video server by input by standby video server;

Also there is abnormal emergency processing step in main video server: the input for described main switching device switches to emergency signal, and the input of standby switching device switches to emergency signal;

There is abnormal emergency processing process in the output monitoring said system of 2 * 1 diverter switches:

At described system end, implement the step of monitoring: for the output staff in 2 * 1 diverter switches, use system output described in monitor Real-Time Monitoring, under normal circumstances, the output of 2 * 1 diverter switches is in main program signal link;

There is abnormal treatment step in described system end monitoring: the monitor epigraph appearance for described system end is abnormal, and staff, by manually stirring 2 * 1 diverter switches, is connected to standby programme signal link by the output of 2 * 1 diverter switches.

The system the present invention relates to comprises: the main broadcaster who is connected with outside programme editing station and database is controlled work station, standby Broadcast Control work station, main 422 negaters, standby 422 negaters, main switching device, standby switching device, main video server, standby video server, main line signal source, reserve line signal source and other needed active and standby signal sources.Main broadcaster is controlled between work station and standby Broadcast Control work station and not only can be realized state-detection, can also be realized sharing of Broadcast Control information and synchronizeing of emergency operation by heartbeat communication, standby Broadcast Control work station is provided with GPI board, and GPI board is connected with the control port of main negater; Main broadcaster is controlled work station and is connected with standby 422 negaters with main 422 negaters with standby Broadcast Control work station, and main 422 negaters are connected with the control port of main video server, the control port of main switching device, form master control link; Standby 422 negaters are connected with the control port of standby video server, the control port of standby switching device, form standby control link; Main switching device is connected with a plurality of AV distributers respectively with the input of standby switching device, has at least one to be connected, to have at least one to be connected, to have at least one to be connected, to have at least one to be connected, to have at least one to be connected with pad with reserve line signal with main line signal with standby video server with main video server in these AV distributers; Main video server, main line signal, a plurality of AV distributer, main switching device form main program signal link, and the output of main program signal link on main switching device is connected with an input that is arranged on 2 * 1 diverter switches on control panel; Standby video server, reserve line signal, AV distributer, standby switching device form standby programme signal link, and the output of standby programme signal link on standby switching device is connected with second input of 2 * 1 diverter switches; The output of 2 * 1 diverter switches is connected with outside transmission system.

The one-touch emergency method of the active and standby output of PGM that uses said system, the step of the method is as follows:

The first, the step of loading preset system configuration parameter.For before system operation, system is carried out to the configuration of preset parameter, configuration parameter comprises following two parts:

1) for video server broadcasting signal source, concerning main switching device, main video server signal is master source, and standby video server signal is standby signal source, and pad signal is emergency signal; For standby switching device, standby video server signal is master source, and main video server signal is standby signal source, and pad is emergency signal;

2) for important line signal also in like manner, for main switching device, main line signal is master source, and reserve line signal is standby signal source; For standby switching device, reserve line signal is master source, and main line signal is standby signal source;

The second, troubleshooting step.Comprise three parallel emergency processing processes of carrying out:

1) main broadcaster is controlled the automatic emergency processing procedure between work station and standby Broadcast Control work station.

Under normal circumstances, main broadcaster is controlled work station in major state, main broadcaster is controlled work station and is controlled video server, video tape recorder, main switching device, according to the program of broadcast items list, broadcast sequential, complete the work of automatic broadcast, standby Broadcast Control work station is controlled the working condition of work station by heartbeat detection main broadcaster;

When standby Broadcast Control work station monitors main broadcaster, control work station and occur that when abnormal, standby Broadcast Control work station triggers gpi signal, controls negater and carries out the switching of control link, the controls metastasis of playing device is to standby Broadcast Control work station, and now standby Broadcast Control work station is in major state;

2) the automatic emergency processing procedure between main video server and standby video server.

Active and standby Broadcast Control work station all can detect the state of the decoding channels of main video server and standby video server, under normal circumstances, the input of main switching device is main video server signal or main line signal, and the input of standby switching device is standby video server signal or reserve line signal;

Active and standby video server occurs being extremely divided into two kinds of situations, and main video server first occurs that abnormal and standby video server first occurs extremely.

If main video server first occurs extremely, Broadcast Control work station switches to standby video server by the input of main switching device by main video server, and the input of standby switching device remains on standby video server; Now, if standby video server also occurs that Broadcast Control work station switches to emergency signal by the input of main switching device extremely, the input of standby switching device also switches to emergency signal;

If standby video server first occurs that extremely, Broadcast Control work station remains on the input of main switching device on main video server, standby switching device switches to main video server by input by standby video server; Now, if main video server also occurs that Broadcast Control work station switches to emergency signal by the input of main switching device extremely, the input of standby switching device also switches to emergency signal;

3) there is abnormal emergency processing process in the monitoring of the output of 2 * 1 diverter switches.

Broadcast the output signal that operator on duty can supervise 2 * 1 diverter switches in real time, under normal circumstances, the outputting cutting of 2 * 1 diverter switches is on main program signal link; If operator on duty finds that the output signal of 2 * 1 diverter switches is abnormal, just stir immediately 2 * 1 diverter switches, the output of 2 * 1 diverter switches is connected to standby programme signal link.

The beneficial effect that the present invention produces is:

Active and standby Broadcast Control work station in the present invention has been realized the control to all playing devices, comprising: the dissimilar playing devices such as video server, video tape recorder, switching device; So while there is any Single Point of Faliure in system, system can shield fault point by effective back mechanism, and can not affect the normal use of any other equipment.

In traditional broadcast control mode, different equipment occurs abnormal, all can have influence on final output, and processing mode is all not identical.For example: 1) if the program of current broadcast is master spare circuit signal rather than active and standby video server signal, whether Broadcast Control work station just cannot detect line signal normal, when main line abnormal signal, cannot realize automatic switchover, need manually the output signal of main switch to be switched on reserve line signal; 2) when controller appears broadcasting in main video server, video server cannot be detected and decode when abnormal, system also cannot realize and automatically switch to standby road, at this moment needs manually the output signal of main switch to be switched on standby video server signal; 3) when main switching device breaks down, need manually 2 * 1 diverter switches to be switched to standby road, by standby diverter switch, bear broadcast task.

Owing to having adopted in the present invention specific switch control logic, while making to occur above-mentioned 3 kinds of common failure conditions, not needing first will determine the end is any failure condition, only need directly to switch 2 * 1 diverter switches, be maskable fault point, normal signal is broadcasted, simplified fault deterministic process, alleviate TV station and broadcasted operator on duty's operating pressure, greatly reduced equipment fault to the influence time broadcasting.

Accompanying drawing explanation

Below in conjunction with drawings and Examples, the invention will be further described.

Fig. 1 is the system block diagram of system described in the embodiment of the present invention one;

Fig. 2 is the flow chart of method described in the embodiment of the present invention two;

Fig. 3 is that the active and standby broadcast controller of method is switched figure described in the embodiment of the present invention two;

Fig. 4 is that the video server of method is switched figure described in the embodiment of the present invention two;

Fig. 5 is that the broadcast switching device of method is switched figure described in the embodiment of the present invention two;

Fig. 6 traditional processing mode schematic diagram while being main line fault;

Fig. 7 traditional processing mode schematic diagram while being main video server fault;

Fig. 8 traditional processing mode schematic diagram while being main switching device fault;

Fig. 9 is the processing mode schematic diagram of method when main line fault described in the embodiment of the present invention two;

Figure 10 is the processing mode schematic diagram of method when main video server fault described in the embodiment of the present invention two;

Figure 11 is the processing mode schematic diagram of method when main switching device fault described in the embodiment of the present invention two.

Embodiment

Embodiment mono-:

The present embodiment is the one-touch emergency system of the active and standby output of a kind of broadcast PGM, and system block diagram as shown in Figure 1.In figure, the thickest heavy line represents main program signal link, slightly finer heavy line represents standby signal link, and thicker double dot dash line represents main control signal link, and single-point line more carefully represents standby control signal link, dotted line represents GPI control link, and strigula represents heartbeat.Described in the present embodiment, system comprises: the main broadcaster who is connected with outside programme editing station and database thereof is controlled work station and standby Broadcast Control work station, described main broadcaster is controlled work station and by heartbeat communication, is realized synchronizeing of state-detection, Broadcast Control emergency operation between Broadcast Control work station, described standby Broadcast Control work station is provided with GPI board, and described GPI board is connected with the control port of main negater; Described main broadcaster is controlled work station and is connected with standby negater with main negater with standby Broadcast Control work station, and described main negater is connected with the control port of main video server, the control port of main switching device, forms master control link; Described standby Broadcast Control work station is connected with the control port of standby video server, the control port of standby switching device, forms standby control link; Described main switching device and standby switching device are provided with a plurality of inputs, described main switching device is connected with a plurality of AV distributers respectively with each input of standby switching device, has at least one to be connected, to have at least one to be connected, to have at least one to be connected, to have at least one to be connected, to have at least one to be connected with emergency signal source with reserve line signal with main line signal with standby video server with main video server in described a plurality of AV distributers; Described main video server, main line signal, a plurality of AV distributer, main switching device form main program signal link, and the output of described main program signal link on main switching device is connected with an input that is arranged on 2 * 1 diverter switches on control panel; Described standby video server, reserve line signal, a plurality of AV distributer, standby switching device form standby programme signal link, the output of described standby programme signal link on standby switching device is connected with another input of described 2 * 1 diverter switches, and the output of described 2 * 1 diverter switches is connected with outside transmission system.

Link described in system described in the present embodiment is two different concepts with being connected, and described connection refers to physical connection, and link refers to logic connection.The present embodiment comprises two very important links: programme signal link and control signal link.These two links have separately independently active and standby double copies link separately.Therefore, system not only has the hardware system of various backups described in the present embodiment, also has the standby system of link aspect, for safe broadcast provides the independent backup of hard soft two aspects.

" major state " described in the present embodiment and " standby control state " refer to: when the control signal of transmitting in link exerts an influence to programme signal, this link considered to be in major state.Although if the control signal in the link of the control signal of transmitting in link and major state is identical, the programme signal of final output is not exerted an influence, this link considered to be in standby control state.

Front end at the present embodiment in described system, programme editing station and database, the programme of TV station's broadcast system broadcast every day carries out layout in advance by programme editing station, and then the service link through examining, examining, is finally submitted to broadcast system.Described programme editing station, when execution programme is submitted to broadcast system, broadcasts in advance programme and is automatically saved in broadcasting in advance in forms data table of database, sends to load simultaneously broadcast in advance programme message informing by Ethernet to Broadcast Control work station.After the Broadcast Control work station of major state receives that programme message is broadcast in loading in advance, carry out import operation loads and broadcasts in advance programme from tables of data corresponding to database, after the programme of broadcast control personnel inspection is errorless, the Broadcast Control work station of major state is carried out and is sent programme operation, to broadcast in advance programme is converted to and just broadcasts programme, by by audit the programme of just broadcasting be saved in just broadcasting in forms data table of database, by heartbeat, interrogate the logical message that sends simultaneously, the Broadcast Control work of the standby control state of notice loads and is just broadcasting programme from the corresponding data table of database, thereby realize the synchronous of broadcast items list in active and standby Broadcast Control work station.Described broadcast items list is exactly the time of starting broadcasting, the broadcast mode that comprises dissimilar program, and the broadcast entry sequence of the information such as signal source type.

In addition, in broadcast process, according to reality, broadcast situation, need once in a while to align and broadcast the programme modification of meeting an urgent need, on Broadcast Control work station, use broadcast software modification just broadcasting the programme information to be broadcast in programme, then carry out the operation that sends programme, to be saved in just broadcasting in forms data table of database through the emergent programme of just broadcasting of revising, by heartbeat, interrogate the logical message that sends simultaneously, notify active and standby Broadcast Control work station to load and just broadcasting programme from the corresponding data table of database, thereby just broadcasting the real-time synchronization of programme.In addition, in broadcast process, also there will be some urgent situations, broadcast operator on duty and need to carry out necessary emergency operation according to actual conditions, for example the current program of just broadcasting finishes in advance, need on the Broadcast Control work station of major state, carry out take operation, the PGM that controls switching device exports the emergent program to be broadcast that is switched to, simultaneously by heartbeat communication, the Broadcast Control work station that sends to standby control state will be put meet an urgent need handover operation and switching time, when arriving some switching time, the synchronous handover operation of meeting an urgent need of carrying out of active and standby Broadcast Control work station.

It is distinguishing that described standby Broadcast Control work station and main broadcaster are controlled work station aspect hardware configuration, in standby Broadcast Control work station inside, a GPI board has been installed specially, and through control line, has been connected to the CTL port of negater.Under normal circumstances, main broadcaster is controlled work station in major state, controls all controlled plants and broadcasts according to programme, and standby Broadcast Control work station is by the operating state of heartbeat communication detection main frame.Wherein, described heartbeat communication can adopt RS232 interface or the special-purpose Socket port of Ethernet to realize.When standby Broadcast Control work station detects main frame, occur extremely, by the machine GPI board, trigger gpi signal immediately and control negater, complete from main broadcaster and control work station control link to the auto switching of standby Broadcast Control work station control link.

Described main negater and standby negater are identical on hardware, just at different links, and have different functions.Described negater can be the negater of RS422 port agreement, can be also the negater of other port agreements.

Described switching device can be to broadcast cut bank, switching matrix or switch.For reducing costs, the present embodiment can adopt small-sized 16 * 2 switchs as switching device.As described in Figure 1, the switching device in figure has only drawn 6 inputs, if use 16 * 2 switching devices, also should have other 10 inputs.In actual broadcast process, these 10 other output majorities are not idle, and switching device provides two-way output signal conventionally, i.e. the abbreviation of PGM(Program) be the abbreviation that current program is just being broadcast signal and PVW(Preview) be program premonitoring signal to be broadcast.Link described in the present embodiment is mainly just being broadcast signal PGM for current program.For program premonitoring signal to be broadcast, because hardware has had backup, so also can realize link backup.

The input of switch between master and slave equipment, as the emergency backup of video server broadcasting signal, is accessed in described emergency signal source.Emergency signal source can be that the advertisement of inserting at any time or other can insert the segment video in any program at any time, for just broadcasting program, occurs abnormal time inserting at any time wherein, makes spectators not feel very lofty.

The transmission system of described outside is the wireless transmitting system of terrestrial television, or the sts satellite transmission system that TV programme signal is transmitted via satellite, or CATV transmission system.TV programme to be transferred to final spectators' transmission system.

Described in the present embodiment, main video server, the formed main program signal link output of main switching device is just to broadcast program.Being and just broadcasting the identical backup signal of program of standby video server, the formed standby programme signal link output of standby switching device, forms the double copies of programme signal.These two signals are connected on two inputs of 2 * 1 diverter switches, therefore, stir the selection of the actual signal exactly this two-way being backed up mutually of 2 * 1 diverter switches.Such benefit is, Broadcast Control personnel are when monitoring final output picture (picture before entering outside transmission system), once this picture occurs any abnormal, without judgement, where this appears at Broadcast Control personnel extremely, directly stir 2 * 1 diverter switches, just can be by final being outputted in correct programme signal of system.

Embodiment bis-:

The present embodiment is the one-touch emergency method of the active and standby output of PGM of system described in a kind of embodiment of use mono-, and flow chart as shown in Figure 2.Described in the present embodiment, the basic ideas of method are: primary link and backup link divided and have comprehensively, and the effect separating is to use 2 * 1 diverter switches select fast at system end.Comprehensive object is, make can be independent between the several important node in primary link and backup link mutual backup, the some nodes in primary link occur extremely, can replace with node corresponding in backup link.

Described in the present embodiment, the step of method is as follows:

1) main switching device is cut main program signal link, and standby switching device is cut standby programme signal link.Broadcast system utilizes switching device to realize the switching scheduling of broadcasting signal, and switching device has very high switching controls precision.For switching device, the baseband signal that all active and standby signal sources of signal input part access go out, output is sent the abbreviation of PGM(Program conventionally) and the abbreviation of PVW(Preview) two-way baseband signal.Wherein, PGM is that current program is just being broadcast signal, for being transferred to spectators by transmission system, watches; PVW is program premonitoring signal to be broadcast, and for the inside broadcast system operator on duty of TV station, treats and broadcasts program and monitor use depending on, audio signal.

If the present embodiment adopts small-sized 16x2 switch as the broadcast switching device of a channel, this switch can access 16 road input signals simultaneously.All broadcasting signals that channel relates to, wherein comprise video server output, video tape recorder output, line signal (for example CCTV-1, studio signal), and the output signal of the dissimilar equipment such as emergency signal source (emergency signal source is generally a road circulation and broadcasts signal, the emergent signal source of broadcasting when broadcasting fault).

The all conventional broadcasting signal of method described in the present embodiment, comprises that video server broadcasting signal and line signal have all adopted the design of redundancy backup.For example, the signal of the CCTV-1 synthesizer channel of process satellite transmission and Optical Fiber Transmission respectively as main line signal and reserve line signal, accesses the input of switching device together with active and standby video server signal.Setting herein, is exactly the in the situation that of normal broadcast, main switching device is configured to only switch to the main path signal of above-mentioned broadcasting signal, and standby switching device is configured to only switch above-mentioned broadcasting signal Bei road signal.

2) for video server broadcasting signal, for main switching device, the backup source of main video server signal is standby video server signal, and emergent source is emergency signal; For standby switching device, the backup source of standby video server signal is main video server signal, and emergent source is emergency signal.The broadcast program that described in the present embodiment, the Broadcast Control work station of method is disposed adopts independently switch control logic for main switching device and standby switching device, and supports three of video server broadcasting signal grades of automatic switchovers.Broadcast the state-detection result of control program based on to active and standby video server decoding channels, control switch between master and slave equipment and work in coordination, comprehensively complete the emergency processing for this type of signal.

Before broadcast system operation, backup source and the emergent source of the video server broadcasting signal of first switch between master and slave equipment being controlled are separately configured.As shown in Figure 1, according to main video server output signal, standby Video service output signal, vcr signal, main line signal, reserve line signal, and the order of emergency signal, successively above-mentioned signal is accessed to the input of main switching device, input port from 1 to 6; Equally, by the input of the standby switching device of above-mentioned signal access, input port from 1 to 6.

Next, the backup source of video server broadcasting signal and emergent source are arranged, the switching device input port sequence number corresponding according to above-mentioned signal source, for main switching device, the backup source of main video server broadcasting signal (input port 1) is set to standby video server broadcasting signal (input port 2), the source of meeting an urgent need is set to emergency signal (input port 6), based on broadcasting the testing result of control program to video server decoding channels state, control the PGM output of main switching device according to above-mentioned 1, 2, 6 order is carried out automatic emergency switching, the broadcast accident such as avoid occurring breaking, for standby switching device, backup source for video server broadcasting signal (input port 2) is set to main video server output signal (input port 1), the source of meeting an urgent need is set to emergency signal (input port 6), based on broadcasting the testing result of control program to video server decoding channels state, control the PGM output of standby switching device and carry out automatic emergency switching according to above-mentioned 2,1,6 order, avoid occurring breaking accident.

3), for important line signal, for main switching device, the backup source of main line signal is reserve line signal; For standby switching device, the backup source of reserve line signal is main line signal.The one-touch emergency method of the active and standby output of described a kind of broadcast system PGM, in order to guarantee that the PGM of switch between master and slave equipment exports from different broadcasting signal sources, for the external line signal of key (for example, CCTV-1 synthesizer channel), using the signal from satellite transmission link and fiber transmission link respectively as main line signal and reserve line signal, access in order the input of main switching device, input port is 4 and 5; Equally, by the input of the standby switching device of above-mentioned signal access, input port is also 4 and 5.

Next the switching control parameter of line signal is arranged, the switching device input port sequence number corresponding according to active and standby line signal, for main switching device, the backup source of main line signal (input port 4) is set to reserve line signal (input port 5); For standby switching device, the backup source of reserve line signal (input port 5) is set to main line signal (input port 4).After Broadcast Control program reads this and is configured to, program for the line signal type in broadcast items list, control respectively the PGM output switching of main switching device to main line signal (input port 4), the PGM output switching of standby switching device is to reserve line signal (input port 5), guarantee in this type program broadcast process, the PGM output of switch between master and slave equipment, from different broadcasting signal sources, improves the fail safe of broadcasting.

Load the step broadcast in advance programme: for ONU On-Air Workstation, receive after loading broadcasts the message of programme in advance, main broadcaster controls work station and standby Broadcast Control work station loads and broadcasts in advance programme from database.At the front end of described system, be programme editing station and database, the programme of TV station's broadcast system broadcast every day carries out layout in advance by programme editing station, and then the service link through examining, examining, is finally submitted to broadcast system.Described programme editing station, when execution programme is submitted to broadcast system, broadcasts in advance programme and is automatically saved in broadcasting in advance in forms data table of database, sends to load simultaneously broadcast in advance programme message informing by Ethernet to Broadcast Control work station.After the Broadcast Control work station of major state receives that programme message is broadcast in loading in advance, carry out import operation loads and broadcasts in advance programme from tables of data corresponding to database, after the programme of broadcast control personnel inspection is errorless, the Broadcast Control work station of major state is carried out and is sent programme operation, to broadcast in advance programme is converted to and just broadcasts programme, by by audit the programme of just broadcasting be saved in just broadcasting in forms data table of database, by heartbeat, interrogate the logical message that sends simultaneously, the Broadcast Control work of the standby control state of notice loads and is just broadcasting programme from the corresponding data table of database, thereby realize the synchronous of broadcast items list in active and standby Broadcast Control work station.Described broadcast items list is exactly the time of starting broadcasting, the broadcast mode that comprises dissimilar program, and the broadcast entry sequence of the information such as signal source type.

If it is abnormal in the normal process of broadcasting, broadcasting signal to occur, described system is processed and the process of personal monitoring and artificial treatment comprises three parallel emergency processing processes of carrying out automatically:

1) main broadcaster is controlled the automatic emergency processing procedure between work station and standby Broadcast Control work station:

Main broadcaster is controlled work station and standby Broadcast Control work station by heartbeat detection step: under normal circumstances, described main broadcaster is controlled work station in major state, main broadcaster is controlled work station and is controlled video server, video tape recorder, switching device, according to the program of broadcast items list, broadcast sequential, complete the work of automatic broadcast, described standby Broadcast Control work station is controlled the working condition of work station by heartbeat detection main broadcaster.

Main broadcaster is controlled work station and is occurred abnormal emergency processing process: for monitor main broadcaster when standby Broadcast Control work station, control work station and occur when abnormal, standby Broadcast Control work station triggers gpi signal automatically, control negater and carry out the switching of control link, the controls metastasis of playing device is to standby Broadcast Control work station, and now standby Broadcast Control work station is in major state.

2) the automatic emergency processing procedure between main video server and standby video server:

Detect the step of the operating state of video server: whether the state of decoding channels that detects main video server and standby video server for the Broadcast Control work station in major state is abnormal, under normal circumstances, the input of main switching device is main video server signal or main line signal, and the input of standby switching device is standby video server signal, reserve line signal.

If a. main video server first occurs extremely:

The emergency processing step of switch between master and slave equipment: control described main switching device for Broadcast Control work station input is switched to standby video server by main video server, the input that Broadcast Control work station is controlled described standby switching device remains on standby video server.

Also there is abnormal emergency processing step in standby video server: the input of controlling described main switching device for Broadcast Control work station switches to emergency signal, and the input that Broadcast Control work station is controlled standby switching device switches to emergency signal.

If b. standby video server first occurs extremely:

The emergency processing step of switch between master and slave equipment: the input of controlling described main switching device for Broadcast Control work station remains on main video server, Broadcast Control work station is controlled described standby switching device input is switched to main video server by standby video server.

Also there is abnormal emergency processing step in main video server: the input of controlling described main switching device for Broadcast Control work station switches to emergency signal, and the input that Broadcast Control work station is controlled standby switching device switches to emergency signal.

3) there is abnormal emergency processing process in the output monitoring said system of 2 * 1 diverter switches:

At described system end, implement the step of monitoring: for the output staff in 2 * 1 diverter switches, use system output described in monitor Real-Time Monitoring, under normal circumstances, the output of 2 * 1 diverter switches is in main program signal link.

Being described below of said process and step:

The complete active-standby mode that the present embodiment can generally adopt based on TV station, rely on the special-purpose Socket port of RS232 or Ethernet to carry out heartbeat communication, realize the state-detection of major state Broadcast Control work station, when detecting unit exception, automatically take over operation, concrete operation is as follows:

Active-standby mode, consists of active and standby Broadcast Control work station and RS422 serial ports negater completely.RS422 negater provides multichannel RS422 control channel, and each passage provides two input ports (Primary and Backup) and an output port.The RS422 control line of active and standby Broadcast Control work station control playing device accesses respectively Primary and the Backup input port of RS422 negater dedicated tunnel, output port is connected to concrete controlled plant by control line, relate to active and standby video server decoding channels, video tape recorder, and switch between master and slave device etc., adopt the shared control realizing in this way playing device.

Under normal circumstances, RS422 negater is in main road, and main broadcaster is controlled work station in major state, controls all controlled plants and broadcasts according to programme, and standby Broadcast Control work station is by the operating state of heartbeat communication detection main frame.Wherein, heartbeat communication adopts RS232 interface or the special-purpose Socket port of Ethernet to realize, when standby Broadcast Control work station detects main frame, occur abnormal, by the machine GPI board, trigger gpi signal immediately and control negater, complete RS422 interface circuit and control work station control link to the auto switching of standby Broadcast Control work station control link from main broadcaster.The Broadcast Control work station of described major state refers to the work station of current control playing device.In broadcast system running, major state and standby control state that main broadcaster is controlled work station, standby Broadcast Control work station are not changeless.

In the present embodiment, negater can adopt RS422 serial port protocol, the Broadcast Control work station of major state detects the state of active and standby video server decoding channels in real time by RS422 serial ports, when the state of decoding channels being detected, occur when abnormal, the independent switch between master and slave equipment of controlling is taked comprehensive emergency processing operation, and concrete operation is as follows:

The preset configuration parameter of Broadcast Control work station loading system of major state, broadcasts sequential according to programme according to program, and independent main switching device and the standby switching device controlled, switches for dissimilar signal achieve frame precision according to control logic separately.Under normal circumstances, for main switching device, just broadcasting program PGM output main video server signal, main line signal are being switched.For standby switching device, just broadcasting program PGM output standby video server signal, reserve line signal are being switched.As shown in Figure 1, under normal circumstances, the PGM of main switching device output is switched main video server signal (input port 1) and main line signal (input port 4).The PGM output of standby switching device is switched standby video server signal (input port 2) and reserve line signal (input port 5).

In broadcast process, whether the state that the Broadcast Control work station of major state detects active and standby video server decoding channels by RS422 serial ports occurs extremely.The Broadcast Control work station of major state passes through RS422 serial ports respectively to main video server, standby video server sending controling instruction, whether Real-time Obtaining port status (Port Status) information, occur according to the state feedback information judgment device of controlled plant extremely.The video server that radio, TV and film industries are used is a kind of coding and decoding equipment of specialty, and the video server of different brands can be divided into hardware compression and software codec two classes according to adopted encoding and decoding technique.The present embodiment relates to the decoding application of video server, based on software codec or hardware compression technology, the program media file of storing in the disk array of the data disks of video server inside or outside is decoded, through professional video and audio I/O board output baseband signal.For video server, VDCP(Video Disk Communications Protocol) be a kind of more common control protocol, based on RS422 serial ports and Broadcast Control work station, carry out communication.The decoding channels of video server, receives the standard VDCP instruction that Broadcast Control work station sends, according to sequential complete program pre-volume, the operation such as broadcast, stop; Receive the state-detection instruction that Broadcast Control work station sends, the state information of feedback device.

If main video server first detected, occur extremely, being deployed in the Broadcast Control program above major state Broadcast Control work station, control respectively the emergent automatic switchover that switch between master and slave equipment carries out broadcasting signal.According to preset system configuration parameter, as shown in Figure 1, the PGM of main switching device output automatically switches to the backup source of main video server signal (input port 1), i.e. standby video server signal (input port 2); Now, for standby switching device, the backup source of standby video server signal (input port 2) is main video server signal (input port 1), so PGM output remains on for video server signal motionless.

If the decoding channels of standby video server detected, also occur extremely, being deployed in the Broadcast Control program above major state Broadcast Control work station, control respectively the emergent automatic switchover that switch between master and slave equipment carries out broadcasting signal.According to preset system configuration parameter, as shown in Figure 1, the PGM of main switching device output automatically switches to the emergent source of main video server signal, i.e. emergency signal (input port 6); Now, for standby switching device, because active and standby main video server all occurs extremely, the PGM of therefore standby switching device output automatically switches to the emergent source of standby video server signal, and emergency signal (input port 6).The PGM output that guarantees broadcast system switch between master and slave equipment can not interrupted, and continues to broadcast emergency signal.

If standby video server first detected, occur extremely, being deployed in the Broadcast Control program above major state Broadcast Control work station, control respectively the emergent automatic switchover that switch between master and slave equipment carries out broadcasting signal.According to preset system configuration parameter, as shown in Figure 1, for main switching device, the backup source of main video server signal (input port 1) is standby video server signal (input port 2), thus PGM output to remain on main video server signal motionless.Now, the PGM of standby switching device output automatically switches to the backup source of standby video server signal (input port 2), i.e. main video server signal (input port 1).

If main video server detected, also occur extremely, being deployed in the Broadcast Control program above major state Broadcast Control work station, control respectively the emergent automatic switchover that switch between master and slave equipment carries out broadcasting signal.According to preset system configuration parameter, as shown in Figure 1, for main switching device, because active and standby main video server all occurs extremely, therefore the PGM of main switching device output automatically switches to the emergent source of main video server signal, and emergency signal (input port 6).Now, for standby switching device, PGM output automatically switches to the emergent source of standby video server signal, i.e. emergency signal (input port 6).The PGM output that guarantees broadcast system switch between master and slave equipment can not interrupted, and continues to broadcast emergency signal.

As mentioned above, be described in the present embodiment method for the comprehensive emergent switching flow of video server broadcasting signal.The real-time detection of broadcast program based on to equipment state, the independent switch between master and slave equipment of controlling, according to the configuration parameter of system intialization, carries out respectively three grades of automatic switchovers of broadcasting signal according to the order in current demand signal source, backup source and emergent source.The comprehensive switching controls of this broadcasting signal is vital for broadcast system, guarantees that broadcasting signal does not interrupt when device fails, automatically completes the seamless switching of broadcasting signal.After equipment fault is got rid of, according to broadcast items list, be switched to next when broadcasting program, switch between master and slave equipment automatically restores to normal condition, the PGM output switching of main switching device is to main video server signal, the PGM output switching of standby switching device, to standby video server signal, possesses to three of video server broadcasting signal grades of automatic switching capabilities broadcast system again.In addition, if current, just broadcasting program duration long, after equipment fault is got rid of, also can wait until the switching point of next program, adopt the mode manually controlled by the PGM output switching of main switching device to main video server signal, manually control the PGM output switching of standby switching device to standby video server signal, broadcast system is possessed again to three of video server broadcasting signal grades of automatic switching capabilities.

In the present embodiment, for final stage 2x1 diverter switch, need the state of monitoring switch between master and slave equipment PGM output signal in real time, according to actual conditions, manually carry out emergency processing operation, concrete operation is as follows:

Under normal circumstances, final stage 2x1 diverter switch is in main program signal link, and the PGM that final output signal is main switching device exports.When main switching device occurs that hardware fault or PGM output signal occur when abnormal, can directly triggering gpi signal by universal control panel, control 2x1 diverter switch and switch to standby road.In method described in the present embodiment, for the broadcasting signal of key equipment, comprise that video server broadcasting signal and line signal have all adopted the design of redundancy backup.And by the broadcast program being deployed in above Broadcast Control work station, the independent switch between master and slave equipment of controlling, broadcasts switching controls according to preset system configuration parameter and specific control logic.In normal situation about broadcasting, the PGM output switching of main switching device is to main program signal link, and the PGM output switching of standby switching device is to standby programme signal link.Therefore, when broadcasting operator on duty, monitor the current link signal appearance of 2x1 final stage switch extremely, can be directly by universal control panel trigger gpi signal by final output switching to another road, simplify the deterministic process of signal fault, really realize the fast processing that operating in a key is realized fault.

In sum, method is than traditional broadcast system described in the present embodiment, and disaster-tolerant backup ability and the fail safe of system have obvious lifting.Based on complete active-standby mode, if the Broadcast Control work station of major state occurs abnormal in broadcast process, the Broadcast Control work station of standby control state is by heartbeat communication detection during to unit exception, take over the control to all playing devices, the Broadcast Control work station now breaking down can keep in repair by off-line, and fault is again reached the standard grade and backed up after getting rid of.Video server as broadcast control system core, also adopted the design of redundancy backup, by the specific control logic of Broadcast Control program, the equipment complex of independent control switch between master and slave realizes three grades of automatic switchovers of video server broadcasting signal, when video server breaks down, avoid occurring breaking accident, guarantee the operation that broadcast system is safe, stable.After equipment fault is got rid of, can return to manually or automatically normal switching state, again possess the ability of emergent three grades of automatic switchovers.For important line signal, the same backup design that adopts high safety, from main line signal, the reserve line signal of different transmission links, accesses respectively main switching device and standby switching device, controlledly carries out high safe broadcast.Finally, described in the present embodiment, method has also been carried out Redundancy Design to switching device, the PGM output of switch between master and slave equipment, the input of access final stage 2x1 diverter switch, when monitoring the signal of the current programme signal link that 2x1 diverter switch selects, occur when abnormal, directly using universal control panel to trigger gpi signal, control final stage 2x1 diverter switch final output signal is switched to an other road, simplify the deterministic process to fault, realized one-touch emergency processing truly.

The specific explanations of step is as follows:

1) for video server broadcasting signal source, concerning main switching device, main video server signal is master source, and standby video server signal is standby signal source, and pad signal is emergency signal; For standby switching device, standby video server signal is master source, and main video server signal is standby signal source, and pad is emergency signal.

2) for important line signal also in like manner, for main switching device, main line signal is master source, and reserve line signal is standby signal source; For standby switching device, reserve line signal is master source, and main line signal is standby signal source.

1) main broadcaster is controlled the emergency processing process between work station and standby Broadcast Control work station.As shown in Figure 3, in figure, the state of work station normal operation is controlled for main broadcaster in left side, and the go wrong state of standby Broadcast Control work station adapter of work station is controlled for main broadcaster in right side.

Under normal circumstances, main broadcaster is controlled work station in major state, main broadcaster is controlled work station and is controlled video server, video tape recorder, main switching device, according to the program of broadcast items list, broadcast sequential, complete the work of automatic broadcast, standby Broadcast Control work station is controlled the working condition of work station by heartbeat detection main broadcaster.

When standby Broadcast Control work station monitors main broadcaster, control work station and occur that when abnormal, standby Broadcast Control work station triggers gpi signal, controls negater and carries out the switching of control link, the controls metastasis of playing device is to standby Broadcast Control work station, and now standby Broadcast Control work station is in major state.

2) the emergency processing process between main video server and standby video server, as shown in Figure 4, when in figure, diagrammatic representation main video server in the upper left corner works, the connection status on switch between master and slave equipment; After intermediate pattern represents to take over for video server when main video server breaks down, the connection status on switch between master and slave equipment; After in figure, the main video server of the diagrammatic representation in the upper right corner breaks down, after standby video server also breaks down, the connection status on switch between master and slave equipment.

Active and standby Broadcast Control work station all can detect the state of the decoding channels of main video server and standby video server, under normal circumstances, the input of main switching device is main video server signal or main line signal, and the input of standby switching device is standby video server signal or reserve line signal.

If main video server first occurs extremely, Broadcast Control work station switches to standby video server by the input of main switching device by main video server, and the input of standby switching device remains on standby video server; Now, if standby video server also occurs that Broadcast Control work station switches to emergency signal by the input of main switching device extremely, the input of standby switching device also switches to emergency signal.

If standby video server first occurs that extremely, Broadcast Control work station remains on the input of main switching device on main video server, standby switching device switches to main video server by input by standby video server; Now, if main video server also occurs that Broadcast Control work station switches to emergency signal by the input of main switching device extremely, the input of standby switching device also switches to emergency signal.

3) there is abnormal emergency processing process in the monitoring of the output of 2 * 1 diverter switches, as shown in Figure 5.State when left side is main switching device normal operation in figure, right side is that main switching device breaks down, the state after standby switching device is taken over.

Active and standby Broadcast Control work station in the present embodiment has been realized the control to all playing devices, comprising: the dissimilar playing devices such as video server, video tape recorder, switching device; So while there is any Single Point of Faliure in system, system can shield fault point by effective back mechanism, and can not affect the normal use of any other equipment.

In traditional broadcast control mode, different equipment occurs abnormal, all can have influence on final output, and processing mode is all not identical.For example:

1) in traditional mode, if the program of current broadcast is master spare circuit signal rather than active and standby video server signal, whether Broadcast Control work station just cannot detect line signal normal, when main line abnormal signal, cannot realize automatic switchover, need manually the output signal of main switch to be switched on reserve line signal, as shown in Figure 6.What in figure, the first half showed is to carry out normal situation about broadcasting with main line, and the latter half is when main line breaks down, the state while being taken over by reserve line.This process extremely bothers.Sometimes be difficult under normal conditions failure judgement point, add and need to manually on switch between master and slave equipment, switch respectively, switch in addition 2 * 1 diverter switches, often need to delay the much time, this is very unfavorable to broadcasting safety.

2) in traditional mode, when controller appears broadcasting in main video server, video server cannot be detected and decode when abnormal, system also cannot realize and automatically switch to standby road, at this moment needs manually the output signal of main switch to be switched on standby video server signal, as shown in Figure 7.What in figure, the first half showed is the normal situation about broadcasting of main video server, and the latter half is main video server while breaking down, the state while being taken over by standby video server.As broken down in main line, the process of switching also very bothers, and also needs first failure judgement point, manually on switch between master and slave equipment, switches respectively, switches 2 * 1 diverter switches.Key is that fault point is extremely difficult to judgement, so the time of delaying is maximum.Particularly troublesome is the fault that video server occurs, Broadcast Control work station cannot detect, and can only check that fault is more complicated by manually judging, the time of delaying is more.

3) in traditional mode, when main switching device breaks down, need manually 2 * 1 diverter switches to be switched to standby road, by standby diverter switch, bear broadcast task, as shown in Figure 8.What in figure, the first half showed is the normal situation about broadcasting of main switching device, and the latter half is main switching device while breaking down, the state while being taken over by standby switching device.This process is quite simple, directly switches 2 * 1 diverter switches, but is problematic in that the judgement of fault point.If know that in advance fault is due to switching device, switch very simple.But generally can not know in advance it is the fault of switching device, thus judgement or time that need to be longer, and the time is vital for broadcasting safety.

The switching mode that adopts in the present embodiment, the time that will judge is got rid of completely, when there is any fault in broadcast system, comprise above-mentioned 3 kinds of common failure conditions, not needing first will determine the end is completely any failure condition, only need directly to switch 2 * 1 diverter switches, it is maskable fault point, first normal signal is broadcasted, simplified fault deterministic process, alleviate TV station and broadcasted operator on duty's operating pressure, greatly reduced equipment fault to the influence time broadcasting, as shown in Fig. 9,10,11.What in figure, the first half showed is normal situation about broadcasting, and the latter half is while breaking down, the state after switching.This process is quite simple, directly switches 2 * 1 diverter switches, where does not need failure judgement point.

Three figure have just illustrated three kinds of situations, and reality also has many kinds of situations, but switch, are all directly to switch 2 * 1 diverter switches.This simple mode has benefited from the most basic switch logic of the present embodiment: main connect active and standby connect standby.With so simple logical solving complicated fault decision problem.

Finally it should be noted that, below only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred arrangement scheme, those of ordinary skill in the art is to be understood that, can be to technical scheme of the present invention (such as the link form of system, the position of negater, the sequencing of step etc.) modify or be equal to replacement, and do not depart from the spirit and scope of technical solution of the present invention.Method of the present invention can be worked out as being applied to the program of computer system, and runs in computer network system of the present invention.

Claims

1. one kind is broadcasted the one-touch emergency system of the active and standby output of PGM, described system comprises: the main broadcaster who is connected with outside programme editing station and database thereof is controlled work station and standby Broadcast Control work station, described main broadcaster is controlled work station and by heartbeat communication, is realized synchronizeing of state-detection, Broadcast Control emergency operation between Broadcast Control work station, described standby Broadcast Control work station is provided with GPI board, and described GPI board is connected with the control port of main negater; Described main broadcaster is controlled work station and is connected with standby negater with main negater with standby Broadcast Control work station, it is characterized in that, described main negater is connected with the control port of main video server, the control port of main switching device, forms master control link; Described standby Broadcast Control work station is connected with the control port of standby video server, the control port of standby switching device, forms standby control link; Described main switching device and standby switching device are provided with a plurality of inputs, described main switching device is connected with a plurality of AV distributers respectively with each input of standby switching device, has at least one to be connected, to have at least one to be connected, to have at least one to be connected, to have at least one to be connected, to have at least one to be connected, to have at least one to be connected with emergency signal source with reserve line with main line with video tape recorder with standby video server with main video server in described a plurality of AV distributers; Described main video server, main line, a plurality of AV distributer, main switching device form main program signal link, and the output of described main program signal link on main switching device is connected with an input that is arranged on 2 * 1 diverter switches on control panel; Described standby video server, reserve line, a plurality of AV distributer, standby switching device form standby programme signal link, the output of described standby programme signal link on standby switching device is connected with another input of described 2 * 1 diverter switches, and the output of described 2 * 1 diverter switches is connected with outside transmission system.

2. system according to claim 1, is characterized in that, described negater is RS422 negater.

3. system according to claim 1 and 2, is characterized in that, described switching device is to broadcast a kind of in cut bank, switching matrix or switch.

4. system according to claim 3, is characterized in that, described switching device is 16 * 2 switchs.

5. right to use requires the one-touch emergency method of the active and standby output of PGM of system described in 1, it is characterized in that the step of described method is as follows:

Load the step of preset system configuration parameter: for before described system operation, system is carried out to the configuration of preset parameter, described configuration parameter comprises following three parts:

Below comprise three parallel emergency processing processes of carrying out:

If main video server first occurs extremely:

If standby video server first occurs extremely: