CN108495187A - Broadcast control device, control method for playing back and play system - Google Patents
Broadcast control device, control method for playing back and play system Download PDFInfo
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- CN108495187A CN108495187A CN201810330862.9A CN201810330862A CN108495187A CN 108495187 A CN108495187 A CN 108495187A CN 201810330862 A CN201810330862 A CN 201810330862A CN 108495187 A CN108495187 A CN 108495187A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
- H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
- H04N21/26613—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel for generating or managing keys in general
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
- H04N21/44236—Monitoring of piracy processes or activities
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
- H04N21/462—Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
- H04N21/4627—Rights management associated to the content
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/765—Interface circuits between an apparatus for recording and another apparatus
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- Engineering & Computer Science (AREA)
- Databases & Information Systems (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Computer Networks & Wireless Communication (AREA)
- Health & Medical Sciences (AREA)
- General Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Virology (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
This application discloses broadcast control device, control method for playing back and play systems.The broadcast control device includes：Playing device, for generating vision signal；Video Controller connect with the playing device and plays channel to be formed；And safety governor, it is connect with the playing device and the Video Controller to form control channel, working condition for controlling the Video Controller, wherein, the playing device obtains currently playing vision signal, it is compared with the expected vision signal played, and monitoring signal is generated according to comparison result, and the monitoring signal is sent to the safety governor, the safety governor receives the monitoring signal, and when the monitoring signal indicates the currently playing vision signal and the expected vision signal played is inconsistent, disable the Video Controller, channel is played to disconnect.The broadcast control device can improve the content security of display screen.
Description
Technical field
The present invention relates to display technology fields, more particularly, to broadcast control device, control method for playing back and play system
System.
Background technology
There are multiple control modes for existing display screen play system, such as synchronous control, asynchronous controlling and network-control
Deng.
Fig. 1 is the schematic block diagram of the LED display play system of the prior art.As shown in Figure 1, the LED display is broadcast
Place system 100 includes that playing device 101, Video Controller 102 and display screen 103 form.Wherein, playing device 101 can be
Computer, it is also possible to processor, it is main to realize the function of media play, and export vision signal and be given to Video Controller
102；Video Controller 102 is and defeated by the display data that the video frequency signal processing received is the specifications parameter for meeting display screen
Go out to display screen 103；Display screen 103 shows the information such as corresponding video, picture and text, notice according to the display data received.So
And there are prodigious hidden danger on content security for existing LED display screens play system.Especially synchronous control system, by
Once played video will be easily caused to be tampered because of faulty operation or poisoning intrusion for computer in its playing device.
Invention content
In view of this, a kind of broadcast control device of present invention proposition, control method for playing back and play system, wherein working as
It is disconnected when the vision signal of preceding broadcasting and the inconsistent expected vision signal played and plays channel, to improve the content of display screen
Safety.
According to the first aspect of the invention, a kind of broadcast control device is provided, including：
Playing device, for generating vision signal；
Video Controller connect with the playing device and plays channel to be formed；And
Safety governor is connect to form control channel with the playing device and the Video Controller, for controlling
The working condition of the Video Controller,
Wherein, the playing device obtains currently playing vision signal, is compared with the expected vision signal played,
And monitoring signal is generated according to comparison result, and the monitoring signal is sent to the safety governor,
The safety governor receives the monitoring signal, and indicates described currently playing regard in the monitoring signal
When frequency signal and the inconsistent expected vision signal played, the Video Controller is disabled, channel is played to disconnect.
Preferably, the safety governor includes safety control module and power management module, the safety control module
The work of the power management module is controlled according to the monitoring signal,
Wherein, when the currently playing vision signal is consistent with the expected vision signal played, the power management
Module is powered to the Video Controller,
In the currently playing vision signal and the inconsistent expected vision signal played, the power management module
Stop powering to the Video Controller.
Preferably, the safety control module more than the predetermined time when not receiving the monitoring signal, the power supply pipe
Reason module stops powering to the Video Controller.
Preferably, the playing device includes：
Program playing module, for program source to be converted into the vision signal；And
Program monitoring module, for the currently playing vision signal of timing acquisition, and by currently playing vision signal
It is compared with the expected vision signal played to generate the monitoring signal.
Preferably, the program monitoring module timing carries out proof of identity to the safety governor, in the identity school
When testing failure or time-out, the program monitoring module closes the program playing module.
Preferably, the program monitoring module includes periodically to safety governor progress proof of identity：
The program monitoring module sends key to the safety governor；
The safety governor uses the key to be decrypted to obtain decryption content；
The safety governor returns to decryption content to the program monitoring module；
The program monitoring module according to it is described decryption content-control described in program monitoring module work,
Wherein, when decrypting incorrect content or waiting time-out, the program monitoring module closes the program and plays mould
Block.
Preferably, the playing device includes the first video interface, and the Video Controller includes the second video interface, warp
The vision signal is transmitted by first video interface and second video interface.
Preferably, the program playing module and the program monitoring module are respectively connected to first video interface.
Preferably, the playing device includes the first communication interface, and the safety governor includes the second communication interface, warp
By first communication interface and second communication interface transmit the monitoring signal, key and decryption content at least it
One.
Preferably, the playing device is computer or processor.
According to the second aspect of the invention, a kind of play system is provided, including：
Display screen；And
Above-mentioned broadcast control device,
Wherein, the Video Controller in the broadcast control device is connected with the display screen to provide display data,
To display program content on the display screen.
Preferably, the programme content includes at least one of video, picture and text, notice.
Preferably, the display screen is LED display.
Preferably, the Video Controller in the broadcast control device by the video frequency signal processing at meeting the LED
The display data of the specifications parameter of display screen.
According to the third aspect of the invention we, a kind of control method for playing back is provided, including
Via the broadcast for playing channel progress vision signal；And
The working condition for playing channel is controlled via control channel,
Wherein, in the control channel, currently playing vision signal and the expected vision signal played are compared
Compared with, to generate monitoring signal, and
Indicate that the currently playing vision signal and the expected vision signal played are inconsistent in the monitoring signal, institute
It states control channel and disconnects the broadcasting channel.
Preferably, the broadcasting channel includes Video Controller, is used for the video frequency signal processing into display data, institute
The power supply that control channel controls the Video Controller according to the monitoring signal is stated,
Wherein, when the currently playing vision signal is consistent with the expected vision signal played, to the video control
Device power supply processed,
In the currently playing vision signal and the inconsistent expected vision signal played, stop to the video control
Device power supply processed.
Preferably, when not receiving the monitoring signal more than the predetermined time, stop powering to the Video Controller.
Preferably, further include that the control channel carries out proof of identity, in proof of identity failure or time-out, stop
Only power to the Video Controller.
Preferably, the proof of identity includes：
Send key；
The key is used to be decrypted to obtain decryption content；
Return to decryption content；
Channel is played according to described in the decryption content-control,
Wherein, when decrypting incorrect content or waiting time-out, the broadcasting channel is disconnected.
Broadcast control device according to the ... of the embodiment of the present invention, via the broadcast for playing channel progress vision signal, via control
Channel control processed plays the working condition in channel, and currently playing vision signal and the expected video played are indicated in monitoring signal
When signal is inconsistent, disconnects and play channel.The broadcast control device is distorted using control channel identification video content, and
It identifies that the when of distorting disconnects and plays channel, thus the content security of display screen can be improved.
Description of the drawings
Description by referring to the following drawings to the embodiment of the present invention, the above and other purposes of the present invention, feature and
Advantage will be apparent from, in the accompanying drawings：
Fig. 1 shows the schematic block diagram of LED display play system according to prior art；
Fig. 2 shows the schematic block diagrams of the LED display play system of first embodiment of the invention；
Fig. 3 shows the schematic block diagram of playing device in the LED display play system of Fig. 2；
Fig. 4 shows the schematic block diagram of Video Controller in the LED display play system of Fig. 2；
Fig. 5 shows the schematic block diagram of safety governor in the LED display play system of Fig. 2；
Fig. 6 shows the flow chart of the LED display control method for playing back of second embodiment of the invention；
Fig. 7 shows the flow chart of the LED display control method for playing back of third embodiment of the invention；
Fig. 8 shows the flow chart of proof of identity process in LED display control method for playing back shown in Fig. 7.
Specific implementation mode
Hereinafter reference will be made to the drawings is more fully described the present invention.In various figures, identical element is using similar attached
Icon is remembered to indicate.For the sake of clarity, the various pieces in attached drawing are not necessarily to scale.Furthermore, it is possible to be not shown certain
Well known part.
In the description of the present invention, it is to be understood that, term " first ", " second " etc. are used for description purposes only, without
It can be interpreted as indicating or implying relative importance.In addition, in the description of the present invention, unless otherwise indicated, the meaning of " multiple "
It is two or more.
Fig. 2 shows the schematic block diagram of the LED display play system of first embodiment of the invention, Fig. 3 to 5 is shown respectively
The schematic block diagram of playing device, Video Controller and safety governor in the LED display play system of Fig. 2.Below in conjunction with
Fig. 2 to 5 further illustrates the structure and operation principle of LED display play system.
The LED display play system 200 includes broadcast control device and display screen 203, and wherein broadcast control device is used
In to display screen 203 provide display data, and realize broadcast content safety.Broadcast control device is for example including playing device
201, Video Controller 202 and safety governor 204.
Playing device 201 can be computer, it is also possible to processor.Playing device 201 includes program playing module
2011 and program monitoring module 2012.Program playing module 2011 is decoded to generate vision signal program source.The program
Source is, for example, the video file of local, or the Streaming Media obtained via network.Program monitoring module 2012 periodically reads video
The vision signal of interface, and the vision signal exported with program playing module 2011 is compared, to generate monitoring signal.
Safety governor 204 includes safety control module 2042 and power management module 2043.Safety control module 2042
According to the monitoring signal received, the working condition of power management module 2043 is controlled.It is indicated in monitoring signal currently playing
When vision signal is consistent with the expected vision signal played, power management module 2043 provides supply voltage.Refer in monitoring signal
When showing currently playing vision signal and the inconsistent expected vision signal played, power management module 2043 disconnects power supply electricity
Pressure.
Display screen 203 is used to, according to the display data received, show the contents such as corresponding video, picture and text, notice.Display
Screen 203 can be any one of LCD display, LED display and OLED display screen.In this embodiment, display screen 203 is
LED display.
Playing device 201 is for example including video interface 2013 and communication interface 2014, and Video Controller 202 is for example including regarding
Frequency interface 2021 and power interface 2022, safety governor 204 is for example including communication interface 2041 and power management module 2043
Feeder ear.Playing device 201 is connected with Video Controller 202 via communication interface 2013,2021, is formed and plays channel,
Wherein, playing device 201 provides vision signal, and Video Controller 202 further advises video frequency signal processing at display screen is met
The display data of lattice.
Safety governor 204 is connected with playing device 201 to obtain monitoring signal via communication interface 2014,2041,
Supply voltage is provided to the power interface 2022 of Video Controller 202 via the feeder ear of power management module 2043, to root
The working condition of Video Controller 202 is controlled according to monitoring signal, forms control channel.When not obtaining power supply, video control
Output of the device 202 by cut-out to display screen 203.
In this embodiment, communication interface is, for example, USB interface, RS232 or S485 serial ports or is network interface (example
Such as RJ45 interfaces), video interface is, for example, VGA (Video Graphics Array, Video Graphics Array) interface, DVI interface
(Digital Visual Interface, digital visual interface), HDMI interface (High Definition Multimedia
Interface, high-definition media interface), SD interface (Serial Digital Interface, digital serial interface) or DP
(DisplayPort) interface etc. can transmit the interface of image data.
As described above, safety broadcasting system proposed by the present invention, is monitored by the vision signal to transmission, showing
When abnormal, safety governor 204 can carry out power operation to Video Controller 202, protect the display safety of display screen.
Fig. 6 shows the flow chart of the LED display control method for playing back of second embodiment of the invention.
This method includes：In step S101, via the broadcast for playing channel progress vision signal；And in step
In S102 to S105, the working condition for playing channel is controlled via control channel.Illustrate in further detail below.
In step S101, the program playing module 2011 of playing device 201, which is decoded program source, generates video letter
Number, vision signal is sent to Video Controller 202 via video interface 2013 and 2021.Video Controller 202 further will
Video frequency signal processing at the specifications parameter for meeting display screen 203 display data, for example, by the Pixel Information in video information
It is converted into the location information and luminance information of LED light.Display screen 203 realizes that programme content is shown according to display data.
In step s 102, the program monitoring module 2012 of playing device 201 is by currently playing vision signal and expection
The vision signal of broadcasting is compared, and to generate monitoring signal, and timing reports monitoring signal to safety governor 204, that is,
Monitoring signal is sent to the safety control module 2042 of safety governor 204 via communication interface 2014 and 2041.
Monitoring signal is received in the safety control module 2042 of step S103, safety governor 204, and determines monitoring signal
Indicate whether currently playing vision signal and the expected vision signal played are consistent.
When currently playing vision signal is consistent with the expected vision signal played, step S104 is executed, maintains to play
Channel.Preferably, in this step, the power management module 2043 of safety governor 204 connects to the power supply of Video Controller 202
Mouth 2022 is powered.
In currently playing vision signal and the inconsistent expected vision signal played, step S105 is executed, disconnection is broadcast
Put channel.Preferably, in this step, the power management module 2043 of safety governor 204 stops to Video Controller 202
Power interface 2022 is powered.
Preferably, safety governor 204 is when waiting for playing device 201 to transmit monitoring signal, internal security control
Module 2042 is made whether the judgement of time-out.When not receiving monitoring signal more than the predetermined time, then it is assumed that system exception, control electricity
Source control module 2043 cuts off the power supply to Video Controller power interface.
Preferably, during playing channel broadcast vision signal, step S102 to S105 is periodically repeated, to real
Now play the real time monitoring in channel.
The control method for playing back of the present embodiment is suitable for LED play systems shown in Fig. 2, and this method is carried out to playing channel
Content inspection.Safety governor receives the monitoring signal for indicating check results, when discovery monitoring signal indicates currently playing
When vision signal is consistent with the expected vision signal played, the broadcasting of vision signal over the display is maintained, when discovery monitoring letter
When number indicating currently playing vision signal and the inconsistent expected vision signal played, then controls Video Controller and stop work
Make, to stop the broadcasting of vision signal on a display screen.The content security of display screen is improved as a result,.
Fig. 7 shows the flow chart of the LED display control method for playing back of third embodiment of the invention.
This method includes：In step S201 to S202, proof of identity is carried out to control channel, in step S101, warp
The broadcast of vision signal is carried out by playing channel；And in step S102 to S105, played via control channel control logical
The working condition in road.
The step S101 to S105 of control method for playing back according to third embodiment and broadcasting according to second embodiment
The corresponding steps of control method are consistent, and only step S201 and S202 are described in detail below.
In step s 201, security control of the program monitoring module 2012 of playing device 201 to safety governor 204
Module 2042 carries out proof of identity, to obtain check results.
In step S202, the program monitoring module 2012 of playing device 201 executes different operations according to check results.
Proof of identity by when, execute step S101 to S105, further monitoring play channel.Proof of identity not by when, hold
Row step S105 is disconnected and is played channel.Preferably, in step S105, the program monitoring module 2012 of playing device 201 controls
Program playing module 2011 makes it stop decoding and output vision signal.
Preferably, during playing channel broadcast vision signal, step S201 to S202 is periodically repeated, to real
The real time monitoring of existing control channel.
The control method for playing back of the present embodiment is suitable for LED play systems shown in Fig. 2, and this method carries out control channel
Proof of identity carries out content inspection to playing channel.When playing device find safety governor proof of identity not by when, then broadcast
It puts device and disconnects broadcasting channel, when safety governor finds that currently playing vision signal and the expected vision signal played differ
When cause, then safety governor, which disconnects, plays channel, to stop the broadcasting of vision signal on a display screen.Display screen as a result,
Content security is further improved.
Fig. 8 shows the flow chart of proof of identity process in LED display control method for playing back shown in Fig. 7.
In step S2011, the program monitoring module 2012 of playing device 201 is via communication interface 2014 and 2041 to peace
The safety control module 2042 of full controller 204 sends key.
In step S2012, the safety control module 2042 of safety governor 204 receives key.
In step S2013, the safety control module 2042 of safety governor 204 uses key to be decrypted to be solved
Close content.
In step S2014, the safety control module 2042 of safety governor 204 via communication interface 2041 and 2014 to
The program monitoring module 2012 of playing device 201 returns to decryption content.
Preferably, in step S2015, the program monitoring module 2012 of playing device 201 judges the return of decryption content
Whether the time is more than the predetermined time.
When the time of return for decrypting content is more than the predetermined time, step S2018 is executed, check results are that verification fails.
When the time of return for decrypting content is less than the predetermined time, step S2016 is executed.
In step S2016, the program monitoring module 2012 of playing device 201 further judges whether just to decrypt content
Really.
When decryption content is incorrect, step S2018 is executed, check results are that verification fails.When decryption content is correct,
Step S2017 is executed, check results are that verification passes through.
In step S2017, verification passes through.
In step S2018, verification failure.
Proof of identity by when, above-mentioned steps S101 to S105 can be executed, further monitoring play channel.In identity
Verification not by when, it may be considered that system exception, can further execute above-mentioned steps S105, channel is played to disconnect.
In the present embodiment, playing device and safety governor can make an appointment a kind of cipher mode and encryption secret key,
When playing device generates the cipher mode and the encryption encrypted key of secret key, safety governor is decrypted, if decryption
It is successful then by decryption content return to playing device, it was demonstrated that proof of identity success, otherwise proof of identity fail.Certainly, identity school
The not limited to this embodiment of the step of testing.The method of other proof of identity can also be applied to the present invention, to be included in this hair
Within bright protection domain.
Broadcast control device and control method for playing back according to the ... of the embodiment of the present invention monitor currently playing in playing channel
Vision signal, in control channel according to monitoring signal control Video Controller power supply or power-off, thus, play channel
The broadcasting for stopping vision signal when being abnormal in time, to improve the safety of display screen broadcasting content.Preferred real
It applies in example, plays channel and proof of identity is carried out to control channel, program playing module stops solution when control channel is abnormal
Code and output vision signal, to further improve the safety of display screen broadcasting content.It should be noted that above-mentioned implementation
The play system and control method for playing back of example are also suitable various types of display screens.
Although the embodiment of the present invention is disclosed as above with preferred embodiment, its be not for limiting claim, it is any
Those skilled in the art without departing from the spirit and scope of the present invention, can make possible variation and modification, therefore this
The protection domain of invention should be subject to the range that the claims in the present invention are defined.
The foregoing is merely the preferred embodiment of the present invention, are not intended to restrict the invention, for those skilled in the art
For, the present invention can have various modifications and changes.It is all within spirit and principles of the present invention made by any modification, equivalent
Replace, improve etc., it should all be included in the protection scope of the present invention.
Claims (19)
1. a kind of broadcast control device, including：
Playing device, for generating vision signal；
Video Controller connect with the playing device and plays channel to be formed；And
Safety governor is connect with the playing device and the Video Controller to form control channel, described for controlling
The working condition of Video Controller,
Wherein, the playing device obtains currently playing vision signal, is compared with the expected vision signal played, and
Monitoring signal is generated according to comparison result, and the monitoring signal is sent to the safety governor,
The safety governor receives the monitoring signal, and indicates the currently playing video letter in the monitoring signal
When number inconsistent with the expected vision signal played, the Video Controller is disabled, channel is played to disconnect.
2. broadcast control device according to claim 1, wherein the safety governor includes safety control module and electricity
Source control module, the safety control module control the work of the power management module according to the monitoring signal,
Wherein, when the currently playing vision signal is consistent with the expected vision signal played, the power management module
It powers to the Video Controller,
In the currently playing vision signal and the inconsistent expected vision signal played, the power management module stops
It powers to the Video Controller.
3. broadcast control device according to claim 2, wherein the safety control module is worked as not to be received more than the predetermined time
When to the monitoring signal, the power management module stops powering to the Video Controller.
4. broadcast control device according to claim 1, wherein the playing device includes：
Program playing module, for program source to be converted into the vision signal；And
Program monitoring module, the vision signal currently playing for timing acquisition, and by currently playing vision signal and in advance
The vision signal that phase plays is compared to generate the monitoring signal.
5. broadcast control device according to claim 4, wherein the program monitoring module timing is to the security control
Device carries out proof of identity, and in proof of identity failure or time-out, the program monitoring module closes the program and plays mould
Block.
6. broadcast control device according to claim 5, wherein the program monitoring module timing is to the security control
Device carries out proof of identity：
The program monitoring module sends key to the safety governor；
The safety governor uses the key to be decrypted to obtain decryption content；
The safety governor returns to decryption content to the program monitoring module；
The program monitoring module according to it is described decryption content-control described in program monitoring module work,
Wherein, when decrypting incorrect content or waiting time-out, the program monitoring module closes the program playing module.
7. broadcast control device according to claim 4, wherein the playing device includes the first video interface, described
Video Controller includes the second video interface, and the video is transmitted via first video interface and second video interface
Signal.
8. broadcast control device according to claim 7, wherein the program playing module and the program monitoring module
It is respectively connected to first video interface.
9. broadcast control device according to claim 4, wherein the playing device includes the first communication interface, described
Safety governor includes the second communication interface, and the monitoring is transmitted via first communication interface and second communication interface
At least one of signal, key and decryption content.
10. broadcast control device according to claim 1, wherein the playing device is computer or processor.
11. a kind of play system, including：
Display screen；And
According to the broadcast control device described in any one of claim 1-10,
Wherein, the Video Controller in the broadcast control device is connected with the display screen to provide display data, to
Display program content on the display screen.
12. play system according to claim 11, wherein the programme content include in video, picture and text, notice extremely
Few one kind.
13. play system according to claim 11, wherein the display screen is LED display.
14. play system according to claim 13, wherein the Video Controller in the broadcast control device will be described
Video frequency signal processing at the specifications parameter for meeting the LED display display data.
15. a kind of control method for playing back, including
Via the broadcast for playing channel progress vision signal；And
The working condition for playing channel is controlled via control channel,
Wherein, in the control channel, currently playing vision signal is compared with the expected vision signal played, with
Monitoring signal is generated, and
Indicate that the currently playing vision signal and the expected vision signal played are inconsistent in the monitoring signal, the control
Channel processed disconnects the broadcasting channel.
16. control method for playing back according to claim 15, wherein the broadcasting channel includes Video Controller, is used for
By the video frequency signal processing at display data, the control channel controls the Video Controller according to the monitoring signal
Power supply,
Wherein, when the currently playing vision signal is consistent with the expected vision signal played, to the Video Controller
Power supply,
In the currently playing vision signal and the inconsistent expected vision signal played, stop to the Video Controller
Power supply.
17. control method for playing back according to claim 16, wherein when not receiving the monitoring signal more than the predetermined time
When, stop powering to the Video Controller.
18. control method for playing back according to claim 15, further includes, the control channel carries out proof of identity, in institute
When stating proof of identity failure or time-out, stop powering to the Video Controller.
19. control method for playing back according to claim 18, wherein the proof of identity includes：
Send key；
The key is used to be decrypted to obtain decryption content；
Return to decryption content；
Channel is played according to described in the decryption content-control,
Wherein, when decrypting incorrect content or waiting time-out, the broadcasting channel is disconnected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810330862.9A CN108495187B (en) | 2018-04-13 | 2018-04-13 | Play control device, play control method and play system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810330862.9A CN108495187B (en) | 2018-04-13 | 2018-04-13 | Play control device, play control method and play system |
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| CN108495187B CN108495187B (en) | 2023-09-08 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113964934A (en) * | 2020-07-21 | 2022-01-21 | 北京瑞华赢科技发展股份有限公司 | Remote monitoring power-off system and method for high-power equipment |
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