CN108495187B - Play control device, play control method and play system - Google Patents
Play control device, play control method and play system Download PDFInfo
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- CN108495187B CN108495187B CN201810330862.9A CN201810330862A CN108495187B CN 108495187 B CN108495187 B CN 108495187B CN 201810330862 A CN201810330862 A CN 201810330862A CN 108495187 B CN108495187 B CN 108495187B
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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
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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]
- H04N21/20—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
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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
- H04N21/44236—Monitoring of piracy processes or activities
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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
- H04N21/45—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
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- 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
The application discloses a play control device, a play control method and a play system. The play control device includes: playback means for generating a video signal; the video controller is connected with the playing device to form a playing channel; and a safety controller connected with the playing device and the video controller to form a control channel for controlling the working state of the video controller, wherein the playing device acquires a currently played video signal, compares the currently played video signal with an expected video signal, generates a monitoring signal according to a comparison result, and sends the monitoring signal to the safety controller, and the safety controller receives the monitoring signal and disables the video controller when the monitoring signal indicates that the currently played video signal is inconsistent with the expected video signal, so that the playing channel is disconnected. The play control device can improve the content security of the display screen.
Description
Technical Field
The present application relates to the field of display technologies, and in particular, to a playback control apparatus, a playback control method, and a playback system.
Background
The existing display screen playing system has various control modes, such as synchronous control, asynchronous control, network control and the like.
Fig. 1 is a schematic block diagram of a prior art LED display screen playback system. As shown in fig. 1, the LED display screen playing system 100 includes a playing device 101, a video controller 102, and a display screen 103. The playing device 101 may be a computer or a processor, mainly implementing a function of playing media, and outputting a video signal to the video controller 102; the video controller 102 processes the received video signal into display data conforming to the specification parameters of the display screen, and outputs the display data to the display screen 103; the display screen 103 displays corresponding information such as video, graphics, notification, and the like according to the received display data. However, the existing LED display screen playing system has a great hidden trouble in content security. In particular, in the synchronous control system, since the playing device is a computer, once the playing device is operated by mistake or is invaded by virus, the played video is easily tampered.
Disclosure of Invention
In view of the above, the present application provides a play control device, a play control method, and a play system, in which a play channel is disconnected when a currently played video signal is inconsistent with an expected played video signal, so as to improve content security of a display screen.
According to a first aspect of the present application, there is provided a play control apparatus comprising:
playback means for generating a video signal;
the video controller is connected with the playing device to form a playing channel; and
a safety controller connected with the playing device and the video controller to form a control channel for controlling the working state of the video controller,
wherein the playing device acquires the video signal which is currently played, compares the video signal with the video signal which is expected to be played, generates a monitoring signal according to the comparison result, sends the monitoring signal to the safety controller,
the safety controller receives the monitoring signal, and disables the video controller when the monitoring signal indicates that the currently played video signal is inconsistent with the video signal expected to be played, so that a playing channel is disconnected.
Preferably, the safety controller comprises a safety control module and a power management module, the safety control module controls the work of the power management module according to the monitoring signal,
wherein the power management module supplies power to the video controller when the currently played video signal is consistent with the video signal expected to be played,
and when the currently played video signal is inconsistent with the video signal expected to be played, the power management module stops supplying power to the video controller.
Preferably, the safety control module stops supplying power to the video controller when the monitoring signal is not received for more than a predetermined time.
Preferably, the playing device includes:
the program playing module is used for converting a program source into the video signal; and
and the program monitoring module is used for acquiring the video signal which is currently played at fixed time and comparing the video signal which is currently played with the video signal which is expected to be played so as to generate the monitoring signal.
Preferably, the program monitoring module performs identity verification on the security controller at regular time, and when the identity verification fails or is overtime, the program monitoring module closes the program playing module.
Preferably, the program monitoring module performs identity verification on the security controller at regular time, including:
the program monitoring module sends a secret key to the safety controller;
the security controller decrypts by adopting the secret key to obtain decrypted content;
the security controller returns decryption content to the program monitoring module;
the program monitoring module controls the operation of the program monitoring module according to the decrypted content,
and when the decrypted content is incorrect or waiting for timeout, the program monitoring module closes the program playing module.
Preferably, the playing device comprises a first video interface, the video controller comprises a second video interface, and the video signal is transmitted through the first video interface and the second video interface.
Preferably, the program playing module and the program monitoring module are respectively connected to the first video interface.
Preferably, the playing device includes a first communication interface, the security controller includes a second communication interface, and at least one of the monitoring signal, the key, and the decrypted content is transmitted via the first communication interface and the second communication interface.
Preferably, the playing device is a computer or a processor.
According to a second aspect of the present application, there is provided a playback system comprising:
a display screen; and
the above-mentioned play control device is provided with,
the video controller in the play control device is connected with the display screen to provide display data, so that program content is displayed on the display screen.
Preferably, the program content comprises at least one of video, graphics context and notification.
Preferably, the display screen is an LED display screen.
Preferably, a video controller in the play control device processes the video signal into display data conforming to the specification parameters of the LED display screen.
According to a third aspect of the present application, there is provided a play control method comprising
Broadcasting video signals through a broadcasting channel; and
the working state of the playing channel is controlled by the control channel,
wherein in the control channel, the currently played video signal is compared with the video signal expected to be played so as to generate a monitoring signal, and
and when the monitoring signal indicates that the currently played video signal is inconsistent with the video signal expected to be played, the control channel cuts off the playing channel.
Preferably, the playing channel comprises a video controller for processing the video signal into display data, the control channel controls the power supply of the video controller according to the monitoring signal,
wherein when the currently played video signal is consistent with the video signal expected to be played, power is supplied to the video controller,
and stopping power supply to the video controller when the currently played video signal is inconsistent with the video signal expected to be played.
Preferably, when the monitoring signal is not received for more than a predetermined time, the power supply to the video controller is stopped.
Preferably, the control channel performs identity verification, and stops supplying power to the video controller when the identity verification fails or is overtime.
Preferably, the identity verification includes:
sending the secret key;
decrypting with the key to obtain decrypted content;
returning the decrypted content;
controlling the playing channel according to the decrypted content,
wherein the playback channel is disconnected when the decrypted content is incorrect or waiting for timeout.
According to the play control device provided by the embodiment of the application, the play channel is used for playing video signals, the working state of the play channel is controlled by the control channel, and the play channel is disconnected when the monitoring signal indicates that the currently played video signals are inconsistent with the video signals expected to be played. The play control device utilizes the control channel to identify the tampering of the video content, and cuts off the play channel when the tampering is identified, so that the content security of the display screen can be improved.
Drawings
The above and other objects, features and advantages of the present application will become more apparent by describing embodiments thereof with reference to the following drawings in which:
FIG. 1 shows a schematic block diagram of an LED display screen playback system according to the prior art;
FIG. 2 shows a schematic block diagram of an LED display screen playback system according to a first embodiment of the present application;
FIG. 3 shows a schematic block diagram of a playback device in the LED display playback system of FIG. 2;
FIG. 4 shows a schematic block diagram of a video controller in the LED display playback system of FIG. 2;
FIG. 5 shows a schematic block diagram of a security controller in the LED display playback system of FIG. 2;
FIG. 6 is a flowchart of a method for controlling the playback of an LED display screen according to a second embodiment of the present application;
FIG. 7 is a flowchart of a method for controlling the play of an LED display screen according to a third embodiment of the present application;
fig. 8 shows a flowchart of an identity verification process in the LED display screen play control method shown in fig. 7.
Detailed Description
The application will be described in more detail below with reference to the accompanying drawings. Like elements are denoted by like reference numerals throughout the various figures. For clarity, the various features of the drawings are not drawn to scale. Furthermore, some well-known portions may not be shown.
In the description of the present application, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, in the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
Fig. 2 shows a schematic block diagram of an LED display screen playing system according to a first embodiment of the present application, and fig. 3 to 5 show schematic block diagrams of a playing device, a video controller and a security controller in the LED display screen playing system of fig. 2, respectively. The structure and operation of the LED display screen playback system is further described below in conjunction with fig. 2-5.
The LED display screen playing system 200 comprises a playing control device and a display screen 203, wherein the playing control device is used for providing display data for the display screen 203 and realizing playing content security. The playback control means includes, for example, a playback device 201, a video controller 202, and a security controller 204.
The playing device 201 may be a computer or a processor. The playback device 201 includes a program playback module 2011 and a program monitor module 2012. The program play module 2011 decodes the program source to generate a video signal. The program source is, for example, a local video file or streaming media acquired via a network. The program monitor module 2012 reads the video signal of the video interface at regular time and compares the video signal with the video signal output by the program play module 2011, thereby generating a monitor signal.
The security controller 204 includes a security control module 2042 and a power management module 2043. The safety control module 2042 controls the operating state of the power management module 2043 according to the received monitoring signal. The power management module 2043 provides a supply voltage when the monitor signal indicates that the currently playing video signal is consistent with the video signal that is expected to be played. When the monitor signal indicates that the currently played video signal is inconsistent with the video signal expected to be played, the power management module 2043 turns off the supply voltage.
The display screen 203 is configured to display corresponding video, graphics context, notification, and the like according to the received display data. The display screen 203 may be any one of an LCD display screen, an LED display screen, and an OLED display screen. In this embodiment, the display screen 203 is an LED display screen.
The playback apparatus 201 includes, for example, a video interface 2013 and a communication interface 2014, the video controller 202 includes, for example, a video interface 2021 and a power interface 2022, and the security controller 204 includes, for example, a communication interface 2041 and a power supply terminal of the power management module 2043. The playing device 201 is connected with the video controller 202 via the communication interfaces 2013, 2021 to form a playing channel, wherein the playing device 201 provides video signals, and the video controller 202 further processes the video signals into display data conforming to the display screen specification.
The security controller 204 is connected to the playing device 201 via the communication interfaces 2014 and 2041 to obtain a monitor signal, and provides a power supply voltage to the power interface 2022 of the video controller 202 via the power supply end of the power management module 2043, so as to control the working state of the video controller 202 according to the monitor signal, and form a control channel. When power is not supplied, the video controller 202 will cut off the output to the display screen 203.
In this embodiment, the communication interface is, for example, a USB interface, an RS232 or S485 serial interface, or a network interface (e.g., RJ45 interface), and the video interface is, for example, a VGA (Video Graphics Array ) interface, a DVI interface (Digital Visual Interface, digital video interface), an HDMI interface (High Definition Multimedia Interface, high-definition multimedia interface), an SD interface (Serial Digital Interface, digital serial interface), or an DP (DisplayPort) interface, which can transmit image data.
As described above, in the secure play system provided by the present application, by monitoring the transmitted video signal, the secure controller 204 can perform the power-off operation on the video controller 202 when the display is abnormal, so as to protect the display security of the display screen.
Fig. 6 shows a flowchart of a method for controlling playing of an LED display screen according to a second embodiment of the present application.
The method comprises the following steps: in step S101, broadcasting of a video signal is performed via a broadcasting channel; and, in steps S102 to S105, the operation state of the play channel is controlled via the control channel. As described in further detail below.
In step S101, the program playing module 2011 of the playing device 201 decodes the program source to generate a video signal, and transmits the video signal to the video controller 202 via the video interfaces 2013 and 2021. The video controller 202 further processes the video signal into display data conforming to the specification parameters of the display screen 203, for example, converts pixel information in the video information into position information and luminance information of the LED lamp. The display screen 203 realizes program content display according to the display data.
In step S102, the program monitor module 2012 of the playback device 201 compares the currently played video signal with the video signal that is expected to be played back to generate a monitor signal, and reports the monitor signal to the security controller 204 at a timing, that is, the monitor signal is transmitted to the security control module 2042 of the security controller 204 via the communication interfaces 2014 and 2041.
In step S103, the security control module 2042 of the security controller 204 receives the monitor signal and determines whether the monitor signal indicates that the currently played video signal is consistent with the video signal that is expected to be played.
When the currently played video signal is consistent with the video signal expected to be played, step S104 is executed to maintain the playing channel. Preferably, in this step, the power management module 2043 of the security controller 204 supplies power to the power interface 2022 of the video controller 202.
When the currently played video signal is inconsistent with the video signal expected to be played, step S105 is executed to disconnect the playing channel. Preferably, in this step, the power management module 2043 of the security controller 204 stops supplying power to the power interface 2022 of the video controller 202.
Preferably, the security controller 204 determines whether the time-out is performed by the security control module 2042 inside the security controller while waiting for the playback device 201 to transmit the monitor signal. When the monitoring signal is not received for more than a predetermined time, the system is considered to be abnormal, and the power management module 2043 is controlled to cut off power supply to the power interface of the video controller.
Preferably, steps S102 to S105 are repeated periodically during the playing of the video signal by the playing channel, so as to realize real-time monitoring of the playing channel.
The play control method of the present embodiment is applicable to the LED play system shown in fig. 2, and performs content inspection on the play channel. And when the monitoring signal is found to be inconsistent with the video signal expected to be played, the video controller is controlled to stop working, so that the video signal is stopped from playing on the display screen. Thereby, the content security of the display screen is improved.
Fig. 7 shows a flowchart of a method for controlling playing of an LED display screen according to a third embodiment of the present application.
The method comprises the following steps: in steps S201 to S202, identity verification is performed on the control channel, and in step S101, broadcasting of the video signal is performed via the broadcasting channel; and, in steps S102 to S105, the operation state of the play channel is controlled via the control channel.
Steps S101 to S105 according to the play control method in the third embodiment correspond to the corresponding steps of the play control method according to the second embodiment, and only steps S201 and S202 will be described in detail below.
In step S201, the program monitor module 2012 of the playback device 201 performs identity verification on the security control module 2042 of the security controller 204, thereby obtaining a verification result.
In step S202, the program monitor module 2012 of the playback apparatus 201 performs different operations according to the verification result. When the identity verification passes, steps S101 to S105 are performed to further monitor the playback channel. When the identity verification fails, step S105 is executed to disconnect the play channel. Preferably, in step S105, the program monitor module 2012 of the playback device 201 controls the program playback module 2011 to stop decoding and outputting the video signal.
Preferably, steps S201 to S202 are repeated periodically during the playing of the video signal by the playing channel, so as to realize real-time monitoring of the control channel.
The play control method of the embodiment is suitable for the LED play system shown in fig. 2, and the method performs identity verification on the control channel and performs content verification on the play channel. When the safety controller finds that the identity verification of the safety controller fails, the playing device cuts off the playing channel, and when the safety controller finds that the currently played video signal is inconsistent with the video signal expected to be played, the safety controller cuts off the playing channel, so that the playing of the video signal on the display screen is stopped. Thereby, the content security of the display screen is further improved.
Fig. 8 shows a flowchart of an identity verification process in the LED display screen play control method shown in fig. 7.
In step S2011, the program monitor module 2012 of the playback device 201 sends the key to the security control module 2042 of the security controller 204 via the communication interfaces 2014 and 2041.
In step S2012, the security control module 2042 of the security controller 204 receives the key.
In step S2013, the security control module 2042 of the security controller 204 decrypts with the key to obtain decrypted content.
In step S2014, the security control module 2042 of the security controller 204 returns the decrypted content to the program monitor module 2012 of the playback device 201 via the communication interfaces 2041 and 2014.
Preferably, in step S2015, the program monitor module 2012 of the playback apparatus 201 determines whether the return time of the decrypted content exceeds a predetermined time.
When the return time of the decrypted content exceeds the predetermined time, step S2018 is executed, and the verification result is that the verification fails. When the return time of the decrypted content does not exceed the predetermined time, step S2016 is performed.
In step S2016, the program monitor module 2012 of the playback apparatus 201 further determines whether the decrypted content is correct.
When the decrypted content is incorrect, step S2018 is executed, and the verification result is that the verification fails. When the decrypted content is correct, step S2017 is executed, and the verification result is verification passing.
In step S2017, the verification passes.
In step S2018, the verification fails.
When the identity verification passes, the above steps S101 to S105 may be performed to further monitor the play channel. When the identity verification fails, the system may be considered to be abnormal, and the above step S105 may be further performed to disconnect the play channel.
In this embodiment, the playing device and the security controller may agree with an encryption mode and an encryption key in advance, when the playing device generates the encryption mode and the encryption key after encryption, the security controller decrypts, if decryption is successful, returns the decrypted content to the playing device, and prove that the identity verification is successful, otherwise, the identity verification is failed. Of course, the step of identity verification is not limited to this embodiment. Other methods of identity verification may be applied to the present application and are therefore included within the scope of the present application.
According to the play control device and the play control method, the video signal which is currently played is monitored in the play channel, and the power supply or the power failure of the video controller is controlled in the control channel according to the monitoring signal, so that the play of the video signal is stopped in time when the play channel is abnormal, and the safety of the play content of the display screen is improved. In a preferred embodiment, the playing channel performs identity verification on the control channel, and when the control channel is abnormal, the program playing module stops decoding and outputting video signals, so that the safety of playing content on the display screen is further improved. It should be noted that the playback system and the playback control method of the above embodiments are also applicable to various types of display screens.
Although the preferred embodiments of the present application have been described above, it should be understood that the present application is not limited to the embodiments described above, and that various changes and modifications can be made by one skilled in the art without departing from the spirit and scope of the present application, and the scope of the present application shall be defined by the appended claims.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, and various modifications and variations may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (18)
1. A playback system, comprising:
playback means for generating a video signal;
the video controller is connected with the playing device to form a playing channel and converts the video signal into display data;
the safety controller is connected with the playing device and the video controller to form a control channel and control the working state of the video controller;
the display screen is connected with the video controller and used for displaying the display data,
wherein the playing device acquires the video signal which is currently played, compares the video signal with the video signal which is expected to be played, generates a monitoring signal according to the comparison result, sends the monitoring signal to the safety controller,
the safety controller receives the monitoring signal, and disables the video controller when the monitoring signal indicates that the currently played video signal is inconsistent with the video signal expected to be played, so that a playing channel is disconnected.
2. The playback system of claim 1, wherein the security controller comprises a security control module and a power management module, the security control module controlling operation of the power management module in accordance with the monitoring signal,
wherein the power management module supplies power to the video controller when the currently played video signal is consistent with the video signal expected to be played,
and when the currently played video signal is inconsistent with the video signal expected to be played, the power management module stops supplying power to the video controller.
3. The playback system of claim 2, wherein the security control module stops supplying power to the video controller when the monitoring signal is not received for more than a predetermined time.
4. The playback system of claim 1, wherein the playback device comprises:
the program playing module is used for converting a program source into the video signal; and
and the program monitoring module is used for acquiring the video signal which is currently played at fixed time and comparing the video signal which is currently played with the video signal which is expected to be played so as to generate the monitoring signal.
5. The playback system of claim 4, wherein the program monitor module performs identity verification on the security controller at regular intervals, and the program monitor module shuts down the program playback module when the identity verification fails or times out.
6. The playback system of claim 5, wherein the program monitor module timing the identity verification of the security controller comprises:
the program monitoring module sends a secret key to the safety controller;
the security controller decrypts by adopting the secret key to obtain decrypted content;
the security controller returns decryption content to the program monitoring module;
the program monitoring module controls the operation of the program monitoring module according to the decrypted content,
and when the decrypted content is incorrect or waiting for timeout, the program monitoring module closes the program playing module.
7. The playback system of claim 4, wherein the playback device comprises a first video interface, the video controller comprises a second video interface, and the video signal is transmitted via the first video interface and the second video interface.
8. The playback system of claim 7, wherein the program playback module and the program monitor module are each coupled to the first video interface.
9. The playback system of claim 4, wherein the playback device includes a first communication interface and the secure controller includes a second communication interface, at least one of the monitoring signal, key, and decrypted content being transmitted via the first communication interface and the second communication interface.
10. The playback system of claim 1, wherein the playback device is a computer or a processor.
11. The playback system of claim 4, wherein the program content of the program source comprises at least one of video, graphics, notifications.
12. The playback system of claim 1, wherein the display screen is an LED display screen.
13. The playback system of claim 12, wherein the video controller processes the video signal into display data that conforms to specification parameters of the LED display screen.
14. A play control method includes
Broadcasting video signals through a broadcasting channel, wherein the broadcasting channel comprises a video controller, and the video controller is used for processing the video signals into display data and transmitting the display data to a display screen for broadcasting;
the working state of the playing channel is controlled by the control channel,
wherein, in the control channel, comparing the currently played video signal with the video signal expected to be played so as to generate a monitoring signal;
and when the monitoring signal indicates that the currently played video signal is inconsistent with the video signal expected to be played, the playing channel is disconnected by disabling the video controller.
15. The playback control method of claim 14, wherein the control channel controls the power supply of the video controller according to the monitor signal,
wherein when the currently played video signal is consistent with the video signal expected to be played, power is supplied to the video controller,
and stopping power supply to the video controller when the currently played video signal is inconsistent with the video signal expected to be played.
16. The play control method of claim 15, wherein the power supply to the video controller is stopped when the monitor signal is not received for more than a predetermined time.
17. The play control method of claim 14, further comprising the control channel performing an identity check, and stopping power supply to the video controller when the identity check fails or times out.
18. The play control method of claim 17, wherein the identity verification comprises:
sending the secret key;
decrypting with the key to obtain decrypted content;
returning the decrypted content;
controlling the playing channel according to the decrypted content,
wherein the playback channel is disconnected when the decrypted content is incorrect or waiting for timeout.
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| CN201810330862.9A CN108495187B (en) | 2018-04-13 | 2018-04-13 | Play control device, play control method and play system |
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| CN109831681B (en) * | 2019-03-12 | 2024-05-31 | 杭州芯讯科技有限公司 | Display screen monitoring system and monitoring method |
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