CN101631204B - A follow-up method and device in a broadcast control system - Google Patents

Abstract

The invention discloses a method for following broadcast in a broadcast controlling system, which comprises the following steps: subtracting the obtained broadcast launching time from the obtained current time; obtaining an inserting point of currently-broadcasted video data needing to be currently broadcasted through calculation; sending a broadcast following command in the obtained inserting point; and realizing the broadcast of a video signal of an interruption part aiming at the currently-broadcasted video data. The invention also discloses a device for following broadcast in the broadcast controlling system; and the device comprises an obtaining unit, a calculation unit and a broadcast realization unit, wherein the calculation unit is used for subtracting the obtained broadcast launching time from the current time, obtaining the inserting point of the currently-broadcasted video data needing to be currently broadcasted through calculation and sending information of the inserting point to the broadcast realization unit so as to realize the broadcast of the video signal of the interruption part. The method and the device are adopted and can broadcast the interrupted video signal in time when a single control and broadcast system having fault in the system repairs the fault and is recovered to a normal working state.

Description

A follow-up method and device in a broadcast control system

technical field

The invention relates to a broadcasting technology in a broadcasting control system, in particular to a method and device for following broadcasting in broadcasting by a video server of the broadcasting control system.

Background technique

At present, the broadcast control system used by TV stations when broadcasting video data generally includes: a video server and a broadcast control unit. Wherein, the video server is usually a video server of a TV station, and the information stored in it includes: a plurality of video data to be broadcast, which can also be referred to as a plurality of materials to be broadcast, and the video server is used to transfer The video data to be broadcasted is broadcasted. The information stored in the broadcast control unit includes: the start time of the video data to be broadcast, and the table of contents of the video data to be broadcast. Here, the identifier of the video data to be broadcast is stored in the table of contents of the video data to be broadcast, and the identifier of the video data to be broadcast corresponds to the video data to be broadcast in the video server. Moreover, the identifiers of the video data to be broadcast in the table of contents of the video data to be broadcast are arranged according to the preset play order, so it can be seen that the table of contents of the video data to be broadcast can also be called the broadcasting table of the video data to be broadcast. out task list. Then, based on the above information stored in the playout control unit, the playout control unit can control the decoding channel of the video server to play out the video data in the video server. And it can control the broadcasting of the video data in the video server corresponding to the broadcasting time.

Usually, in order to ensure the safety of broadcasting, TV stations generally adopt a backup mechanism to ensure safety in the broadcasting control system. Figure 1 shows the existing broadcast control system with safety backup measures. In Figure 1, the system includes two sets of control and broadcast systems, the master and the backup. Wherein, the main control and playout system includes the main playout control unit 11 and the main video server 12 ; the standby control and playout system includes the standby playout control unit 21 and the standby video server 22 . Moreover, the main video signal output through the main control and playout system, and the backup video signal output through the backup control and playout system are switched and decoded by the signal switching device 31 and then output. Specifically, the system uses two broadcast control units to respectively control the decoding channels of two video servers to broadcast video data. That is, the main video server 12 is controlled by the main broadcast control unit 11 ; the standby video server 22 is controlled by the standby broadcast control unit 21 . The two playout control units have a master-backup relationship with each other. The main playout control unit 11 and the backup playout control unit 21 exchange data through the network, and the information stored by the two remains consistent, such as the stored information to be played out. The table of contents of the video data agrees. The two video servers also have a master/backup relationship with each other, and the master video server 12 and the backup video server 22 generally store the same video data. Usually, the main video signal received from the main video server 12 is finally decoded by the signal switching device 31 and then output to the outside. When the signal switching device 31 fails to receive the main video signal, it switches to receive the backup video signal, and outputs the received backup video signal after decoding. Here, it should be pointed out that the broadcast control unit generally also supports switching. For example, in the case of a failure of the main broadcast control unit 11, the standby broadcast control unit 21 can obtain the control right as the main broadcast control unit to control the video data. broadcast. The switching of the master/standby video signal and the switch of the master/standby broadcast control unit are generally synchronous.

In the normal working state of the main and backup control and broadcasting systems in the system, the safety is effectively guaranteed because the two identical broadcasting systems are carried out synchronously. However, when a broadcast control unit breaks down, another broadcast control unit will independently undertake the task of controlling the broadcast of video data, that is to say, the broadcast at this time has lost the backup mechanism. The longer the backup mechanism, the greater the risk of broadcasting.

Specifically, since the identifiers of the video data to be broadcast in the video data table of contents to be broadcast are arranged according to the preset broadcast order, the play control unit controls the The decoding channel of the video server is used for broadcasting video data. As shown in Figure 3, it is a table of video data to be broadcast, corresponding to the preset play order, the table of video data to be broadcast stores the identification of the first video data, the identification of the second video data, .. ..., and the identification of the Nth video data. And the main broadcast control unit and the standby broadcast control unit have exactly the same directory table of video data to be broadcast. Then, for the broadcasting under the condition that a broadcasting control unit breaks down, for example, if the current TV station wants to broadcast the first video data, the standby broadcasting control unit will use the first video data in the video data directory table to be broadcasted. The identifier of the video data and the broadcasting time of the first video data control the broadcasting of the corresponding first video data in the video server. If the standby playout control unit or the standby decoding channel breaks down, the first video data cannot be played out, and only the main playout control unit controls the main decoding channel to complete the broadcasting of the first video data. That is to say, currently only one main video signal is broadcast, and there is no safety backup mechanism. If after the first video data is broadcast for a period of time, the faulty standby broadcast control unit or standby decoding channel is repaired and restored to normal working state, the standby video signal cannot be restored until the next piece of second video data is broadcast broadcast. This is because, using the prior art, the playout control unit can only send a playout command to the decoding channel at the start time of the video data to be played out. It can be seen that, at the broadcasting time of the first video data, the broadcast control unit will send a broadcast command to the first video data according to the identifier of the first video data in the video data table of contents to be broadcast, thereby controlling the video server broadcasting of the corresponding first video data. And once the broadcasting time of the first video data has passed, the broadcast control unit will not send the broadcast command to the first video data again, so that the broadcasting of the interrupt backup part video signal for the first video data cannot be controlled. If the broadcasting time of the first video data is relatively long, there is no backup mechanism for the video signals played during the continuous broadcasting period of the first video data, which is risky.

Contents of the invention

In view of this, the main purpose of the present invention is to provide a follow-up method in the broadcast control system. When a fault occurs in the system and a single control and broadcast system is repaired and restored to a normal working state, the interrupted broadcast can be promptly restored. The video signal is broadcast.

Another object of the present invention is to provide a follow-up device in the broadcast control system, which can broadcast the interrupted video signal in time when the failure of the single control and broadcast system in the system is repaired and restored to the normal working state. out.

In order to achieve the above object, technical solution of the present invention is achieved in that way:

A follow-up method in a broadcast control system, the method comprising the following steps:

A. Obtain the current time corresponding to the currently played video data during the playback process after troubleshooting and recovery, and the start time of the currently played video data;

B. The obtained current time is subtracted from the acquired start time to calculate the insertion point that the currently played video data should be broadcast at present; send a follow-up command at the obtained insertion point to realize the broadcasting for all Describes the broadcasting of the video signal of the interrupted part of the currently playing video data.

Wherein, in step B, the calculation of the insertion point where the currently played video data should be played is further as follows: after subtracting the acquired start time from the acquired current time, add the delay time of the system, The insertion point at which the currently played video data should be played is obtained.

Wherein, in the case that the main broadcast control unit in the system is faulty, before step A, it also includes: the standby broadcast control unit detects that the main broadcast control unit has a fault, and based on the main broadcast control unit in the system, The switching mechanism between the control unit and the standby broadcast control unit is switched, and the current main broadcast control unit obtained by switching completes the broadcast of the currently played video data; during the playback of the currently played video data, Enter and execute the step A after the fault of the currently standby broadcast control unit obtained by switching is recovered after troubleshooting.

Wherein, in the case that there is a failure in the standby playout control unit in the system, during the playing process of the currently played video data, the standby playout control unit enters and executes the step A after troubleshooting and recovery. .

Wherein, in the case where both the main playout control unit and the standby playout control unit in the system fail, during the playing process of the currently played video data, the main playout control unit and the standby playout control unit After the unit has been restored after troubleshooting, go to and perform step A as described.

Wherein, in the case of a system hardware failure, select to trigger the follow-up operation, enter and execute the step A.

A follow-up device in a broadcast control system, the device includes: an acquisition unit, a calculation unit and a follow-up realization unit; wherein,

The obtaining unit is used to obtain the current time corresponding to the currently played video data during the playing process, and the broadcast start time of the currently played video data, and send the acquired current time and the broadcast start time to the computing unit;

A calculation unit, configured to subtract the obtained start time from the current time to calculate the insertion point that should be broadcasted currently for the currently played video data, and send the information of the insertion point to the follow-up broadcast implementation unit;

The follow-up implementation unit is configured to send a follow-up command at the obtained insertion point after receiving the information of the insertion point, so as to realize the playback of the video signal of the interrupted part of the currently played video data.

Wherein, the calculation unit is further configured to subtract the acquired starting time from the current time, and add the delay time of the system to calculate the insertion point where the currently played video data should be played.

The present invention obtains the current time corresponding to the currently played video data in the playback process after troubleshooting and recovery after the system failure is recovered during the playback process of the currently played video data, and the start time of the currently played video data; The obtained current time is subtracted from the obtained start time to calculate the insertion point that the currently played video data should be broadcast at present; send a follow-up command at the insertion point to realize the interruption part for the currently played video data Broadcasting of video signals.

By adopting the invention, when the failure of a single control and broadcast system in the system is repaired and restored to the normal working state, the backup mechanism can be restored in time, and the interrupted video signal can be broadcast quickly.

Description of drawings

FIG. 1 is a schematic diagram of the composition and structure of an existing broadcast control system;

Fig. 2 is the realization flow diagram of principle of the method of the present invention;

Fig. 3 is the composition schematic diagram of an example of the video data directory table to be played;

FIG. 4 is a schematic diagram of a broadcast time period corresponding to the first video data.

Detailed ways

The core idea of the present invention is: in the playback process of the currently played video data, when the system failure is restored, calculate the insertion point that the currently played video data should be played at present, and send a follow-up command to realize the current playback The video data interrupts the broadcast of the partial video signal.

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail by citing the following embodiments and referring to the accompanying drawings.

As shown in Figure 2, a method for following broadcast in a broadcast control system, the method comprises the following steps:

Step 101. Obtain the current time corresponding to the currently played video data during the playing process after troubleshooting and recovery, and the start time of the currently played video data.

Step 102: Subtract the acquired start time from the acquired current time to calculate the insertion point where the currently played video data should be played.

Here, for the insertion point, that is to say, let the current video data start playing from the point where the current time corresponds to the point where the current video data should be played, that is, the point after troubleshooting and recovery. For example, the current time is 8:10, and the start time is 8:00, and the subtraction of the two results in 10 minutes. Then, the 10th minute of the current video data is the currently played video data. The insertion point of the current video data will be played from the 10th minute of the current video data until the current video data is played.

Step 103: Send a follow-up command at the obtained insertion time point to realize the playback of the interrupted part of the video signal for the currently played video data.

It should be pointed out here that there are two application scopes for the present invention to implement steps 101 to 103 to play the video signal of the interrupted part of the currently played video data in the system. The first type of application scope is that the system adopts a backup mechanism, that is to say, for a system that includes two sets of control and broadcasting systems, the main and the backup, and there is a situation where the main and backup video signals are broadcast synchronously, then when When a system fault causes one of the video signals to be unable to be broadcast synchronously, the present invention can restore the backup mechanism in time when a single fault occurs in the system and the broadcast system fault is restored to the normal working state, and quickly ground will interrupt the playback of the backup video signal. Moreover, since the main playout control unit and the standby playout control unit in the system can be switched, there is no main playout control unit or standby playout control unit in a complete sense. Just refer to the current state of the system to determine the main broadcast control unit or the standby broadcast control unit. That is to say, the main and backup video signals are actually broadcast simultaneously. When one of the video signals, such as the main video signal or the backup video signal, is not broadcast synchronously due to a fault such as a software failure or hardware failure, the failure After recovery, the signal that interrupts synchronous broadcasting can be quickly resumed broadcasting by adopting the present invention.

The second application range is that the system is a system without a backup mechanism, that is to say, for a system with only one set of control and broadcasting system, when the system fails and the video signal cannot be broadcasted, the present invention can When the failure of the control and broadcasting system in the system is repaired and restored to the normal working state, the interrupted broadcasting video signal will be broadcasted quickly.

Method Embodiment 1 is: in combination with the video data directory table to be played shown in FIG. 3 , when the first video data is played, due to the video data scheduling problem, the standby video server where the decoding channel is located does not store the first video data. Video data, but no one discovered this problem or did not deal with it before the broadcast. Then, when the first video data is broadcast, the standby video server where the standby decoding channel is located will not be able to broadcast the first video data. At this time, the system operator discovers this problem, and quickly migrates the first video data to the corresponding standby video server. If the existing technology is adopted, then because the playout command for the first video data has been sent by the equipment playout control unit, the playout order will not be sent again, and the equipment decoding channel will wait until the next second video data is broadcasted. The broadcast signal will be restored, resulting in the use of a single control and broadcast system to achieve broadcast during the continuous broadcast period of the first video data. There is no backup mechanism, and there are risks. In the case that there is a problem in the scheduling of such video data, in this embodiment, in combination with the schematic diagram of the broadcast time period corresponding to the first video data shown in Figure 4 and Figure 1, the follow-up method in the broadcast control system includes the following steps :

Step 201: The standby playout control unit inquires the information stored by itself to obtain the start time of the first video data and the current time corresponding to the first video data during the play process after the problems existing in the scheduling of the video data are eliminated.

Step 202, the standby broadcast control unit operates its own arithmetic unit (not shown in Figure 1), subtracts the acquired start time from the acquired current time, and calculates the insertion point that the first video data should currently broadcast; At the obtained insertion point, send a follow-up command, that is, a synchronous play command, to the standby video server where the standby decoding channel is located, so as to realize the playback of the interrupted backup part of the video signal for the first video data.

Here, in step 202, obtaining the insertion point at which the first video data should be broadcasted is further: the standby broadcasting control unit runs its own arithmetic unit (not shown in FIG. 1 ), and subtracts the obtained current time from the acquired After the broadcast start time, add up the delay time of the system to obtain the insertion point where the first video data should be broadcast at present. Wherein, the delay time of the system includes: the operation time of the computing unit of the backup play control unit itself, and the delay time of sending the follow-up play command. And, A in Fig. 4 is used for identifying the playout point of the first video data corresponding to the broadcast start time, and B is used for identifying the broadcast point of the first video data corresponding to the play end time; A1 is used for identifying the first video data current The insertion point that should be played; A1' is used to identify the insertion point that the first video data should currently play after considering the delay effect of the system delay time.

That is to say, from the insertion point A1, for the period corresponding to the broadcast point B of the first video data corresponding to the playback end time from the insertion point A1, the video signal for the interrupted backup part of the first video data is transmitted and broadcasted. When issuing commands, the delay time of the system needs to be further considered. For the delay time of the system, for example, it takes 40 milliseconds for the calculation time from the computer of the standby broadcast control unit to start the operation until the standby broadcast control unit sends the follow-up command; and the standby video server receives the follow-up command to For the video signal broadcasting of the interrupt backup part of the first video data, a delay time of 400 milliseconds is required, so the delay time of the system is 440 milliseconds, that is, considering the delay time of the system, the insertion point A1' is 440 milliseconds after the original insertion point A1. In this way, when the failure of a single control and broadcast system in the system is repaired and restored to normal working status, it is possible to search for the insertion point in the playback process of the currently playing video data and send a follow-up command to achieve a short-term Restore and broadcast the currently interrupted video data, so as to ensure that the broadcast of video data has a backup mechanism, so that the broadcast of the main and backup control and broadcast systems can be synchronized, thereby reducing the risk of broadcasting that cannot be backed up in time.

What needs to be pointed out here is that we divide system failures into two categories according to the different ways of handling system failures. The first type of situation is system broadcast software failure, including the unusable software caused by the failure of the computer where the broadcast software is located, such as the main broadcast control unit failure; the second type of system non-broadcast software failure is the system hardware failure, Including video server failure, control line failure, power failure and any hardware equipment failure other than software. In the following, according to these two types of situations, we will give examples to explain the processing methods after the system failure is restored.

For the first type of situation, there are three ways to deal with it. In the first processing mode, in the case that the main broadcast control unit in the system is faulty, the processing flow after troubleshooting is the same as Step 201-Step 202 in Method Embodiment 1, including Step 301-Step 302. The only difference is that before step 301, it also includes: the standby playout control unit detects that the main playout control unit has a fault, and based on the switching mechanism between the main playout control unit and the standby playout control unit in the system, the main playout control unit and standby playout control unit, and switch the standby playout control unit to the current main playout control unit; switch the main playout control unit to the current standby playout control unit. That is to say, at this moment, the current main playout control unit completes the playout of the currently played video data, that is, the previous standby playout control unit takes over the control right after being switched and switches to the main playout control unit, and the The standby video signal controlled by the previous standby broadcast control unit is switched to the final output. Here, the currently playing video data is the first video data, then during the playing process of the first video data, after the fault of the current backup play control unit is recovered, execute steps 301 to 302, that is, in the current backup play control unit Under the control of the control unit, search for the insertion point where the first video data should be broadcasted and send a follow-up command, so as to realize the broadcasting of the interrupted backup part of the video signal for the first video data.

In the second processing mode, in the case that there is a fault in the standby playout control unit in the system, the processing flow of the standby playout control unit after troubleshooting and recovery is the same as that of steps 201 to 202 in the first method embodiment, including steps 401 to 202. Step 402. For example, the currently played video data is the first video data, and the standby play control unit fails. If during the playing process of the first video data, after the standby playout control unit troubleshoots and recovers, execute steps 401 to 402, that is, under the control of the standby playout control unit, search for the insertion point where the first video data should be played out at present. Click and send a follow-up command to realize the playback of the video signal for the interruption backup part of the first video data.

The third processing method, in the case that both the main broadcast control unit and the standby broadcast control unit in the system are faulty, the processing flow and method embodiment of the main broadcast control unit or the standby broadcast control unit after troubleshooting and recovery Steps 201 to 202 of Step 1 are similar, including Steps 501 to 502. The only difference lies in whether steps 501 to 502 are executed under the control of the master broadcast control unit or the backup broadcast control unit. For example, the currently played video data is the first video data, and the main broadcast control unit and the standby broadcast control unit fail. If during the playing process of the first video data, after the standby playout control unit troubleshoots and recovers, perform steps 501 to 502, that is, under the control of the standby playout control unit, search for the insertion point where the first video data should be played out at present. Click and send a follow-up command to realize the playback of the video signal for the interruption backup part of the first video data. And, if during the playing process of the first video data, after the main broadcast control unit recovers after troubleshooting, the steps 501 to 502 are also performed, that is, under the control of the main broadcast control unit, it is to find the first video data that should be played at present. The insertion point and send a follow-up command, so as to realize the playback of the video signal for the interruption backup part of the first video data.

For the second type of situation, for example, when the hardware failure of the system is the failure of the decoding channel of the standby video server, the broadcasting of the standby video signal will be interrupted immediately. For example, the currently played video data is the first video data. If during the playback of the first video data, after troubleshooting on the decoding channel of the standby video server, you can manually select and trigger the follow-up operation. The specific flow process is similar to the first processing method of the first type of situation. It is also under the control of the current standby play control unit to find the insertion point where the first video data should be played at present and send a follow-up command to achieve the target The interruption of the first video data backs up the playout of the partial video signal.

A follow-up device in a broadcast control system, the device includes: an acquisition unit, a calculation unit and a follow-up realization unit. Wherein, the obtaining unit is used to obtain the current time corresponding to the currently played video data in the playing process after troubleshooting and recovery, and the start time of the currently played video data, and the obtained current time and the start time sent to the computing unit. The calculation unit is used to subtract the obtained start time from the current time to calculate the insertion point of the currently played video data that should be played at present, and send the information of the insertion point to the follow-up implementation unit. The follow-up realization unit is configured to send a follow-up command at the obtained insertion point after receiving the information of the insertion point, so as to realize the playout of the interrupted part of the video signal for the currently played video data.

Here, the calculation unit is further configured to subtract the acquired starting time from the current time, and add the delay time of the system to calculate the insertion point where the currently played video data should be played.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention.

Claims (8)

1. A broadcast following method in a broadcast control system, the method comprising the steps of:

A. acquiring the current time corresponding to the currently played video data in the playing process after the failure recovery and the playing time of the currently played video data;

B. subtracting the acquired playing time from the acquired current time, and calculating to obtain an insertion point of the currently played video data, which should be played; and sending a follow-playing command at the obtained insertion point to realize the playing of the interrupted video signal aiming at the currently played video data.

2. The method of claim 1, wherein in step B, the calculating the insertion point at which the currently played video data should be currently played further comprises: and subtracting the acquired playing time from the acquired current time, and then accumulating the delay time of the system to obtain the insertion point of the currently played video data which should be played.

3. The method according to claim 1 or 2, wherein in case of a failure of an anchor control unit in the system, step a is preceded by: the standby broadcasting control unit detects that the main broadcasting control unit has a fault, switches based on a switching mechanism between the main broadcasting control unit and the standby broadcasting control unit in the system, switches the standby broadcasting control unit into the current main broadcasting control unit, switches the main broadcasting control unit into the current standby broadcasting control unit, and finishes the broadcasting of the currently-played video data by the switched current main broadcasting control unit; and B, in the playing process of the currently played video data, after the switched current standby playing control unit is cleared and recovered, entering and executing the step A.

4. The method according to claim 1 or 2, wherein, in case of a failure of a standby broadcast control unit in the system, during the playing of the currently played video data, the standby broadcast control unit enters and executes step a after the failure is eliminated and recovered.

5. The method according to claim 1 or 2, wherein, in the case that both the main play-out control unit and the standby play-out control unit in the system have a fault, during the playing process of the currently played video data, after the main play-out control unit and the standby play-out control unit have recovered from the fault, step a is entered and executed.

6. The method according to claim 1 or 2, wherein in the case that the system hardware failure is a standby video server decoding channel failure, after the standby video server decoding channel failure is cleared and recovered, the follow-up operation is manually selected and triggered, and the step a is entered and executed.

7. A broadcast-following apparatus in a broadcast control system, the apparatus comprising: the device comprises an acquisition unit, a calculation unit and a follow-broadcast realization unit; wherein,

the acquisition unit is used for acquiring the current time corresponding to the currently played video data in the playing process and the playing time of the currently played video data, and sending the acquired current time and the playing time to the calculation unit;

the calculation unit is used for subtracting the acquired starting time from the current time, calculating to obtain an insertion point which is required to be played currently by the currently played video data, and sending the information of the insertion point to the follow-up playing implementation unit;

and the follow-up playing realization unit is used for sending a follow-up playing command at the obtained insertion point after receiving the information of the insertion point so as to realize the playing of the interrupted part of the video signal of the currently played video data.

8. The apparatus of claim 7, wherein the computing unit is further configured to calculate an insertion point at which the currently playing video data should be currently played by subtracting the obtained playing time from the current time and then adding a delay time of the system.

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