CN111491186B - Video control method in vehicle electronic information system - Google Patents
Video control method in vehicle electronic information system Download PDFInfo
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- CN111491186B CN111491186B CN202010310389.5A CN202010310389A CN111491186B CN 111491186 B CN111491186 B CN 111491186B CN 202010310389 A CN202010310389 A CN 202010310389A CN 111491186 B CN111491186 B CN 111491186B
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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
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/241—Operating system [OS] processes, e.g. server setup
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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
- H04N21/21—Server components or server architectures
- H04N21/214—Specialised server platform, e.g. server located in an airplane, hotel, hospital
- H04N21/2146—Specialised server platform, e.g. server located in an airplane, hotel, hospital located in mass transportation means, e.g. aircraft, train or bus
-
- 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
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/24—Monitoring of processes or resources, e.g. monitoring of server load, available bandwidth, upstream requests
-
- 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
- H04N21/262—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists
- H04N21/26291—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists for providing content or additional data updates, e.g. updating software modules, stored at the client
-
- 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
- H04N21/2665—Gathering content from different sources, e.g. Internet and satellite
-
- 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]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/633—Control signals issued by server directed to the network components or client
- H04N21/6332—Control signals issued by server directed to the network components or client directed to client
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Databases & Information Systems (AREA)
- Aviation & Aerospace Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- General Physics & Mathematics (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention belongs to the technical field of vehicle-mounted information networks, and particularly relates to a video control method in a vehicle electronic information system. The equipment or software involved in the method comprises video acquisition equipment, a video service management program, a display terminal computer and other vehicle-mounted networking equipment; secondly, for the video service management program, the video control method comprises 5 steps of initialization, video request waiting, control command generation, command sending and timeout waiting, and exit. The invention has the advantages that the centralized program management and control of all videos in the vehicle electronic information system are realized, the vehicle electronic information system architecture based on the comprehensive core processing can be seamlessly integrated, meanwhile, the program also has the capabilities of fault recovery and dynamic reconfiguration, the traditional video service and the video equipment are decoupled, the universality and the flexibility are increased, and a more flexible management and use mode is provided for the vehicle-mounted video service.
Description
Technical Field
The invention belongs to the technical field of vehicle-mounted information networks, and particularly relates to a video control method in a vehicle-mounted network.
Background
At present, the transmission and service control of vehicle-mounted videos are mainly divided into two types, one type is a server-client mode based on networking, a video server integrates digital or analog video input of a plurality of video sources, after a request for requesting of a passenger or a display control terminal is generated, the video server responds to the request, changes the state of the video server and provides video transmission, the mode is similar to the video service on the internet, and the difference is that the number of the vehicle-mounted video servers is small and no backup is generated between the vehicle-mounted video servers; the second is a point-to-point mode, that is, multiple paths of digital or analog videos are simultaneously accessed into a display control computer with strong processing capacity, and the displayed interface and videos are automatically organized through a program. The requirement of the point-to-point mode on the display control computer is high, the fault tolerance is low, the number of terminals is limited, and the open type and self-adaption are difficult to achieve due to the fact that network transmission is not adopted.
With the development of generalization and integration of vehicle-mounted computing processing platforms, an Integrated Core Process (ICP) concept is gradually introduced into the design of a vehicle electronic information system of a special vehicle, and the system adopts a unified management center to take charge of functions of display control, information processing, vehicle management and the like of the vehicle and adopts fault redundancy and a backup reconstruction technology of software and hardware to improve the robustness of the information system. On one hand, the method aims to solve the problems that the video service management is dispersed, the reliability and robustness are not high, the service software cannot be dynamically reconstructed and the real-time performance of the universal video transmission is not high in the conventional server-client mode based on networking; on the other hand, the problems that the point-to-point video mode has high requirement on the processing capacity of a display control computer, the system is not open, the system is not flexible and the fault tolerance is low are solved, and a time-frequency control method for a vehicle electronic information system architecture based on comprehensive core processing needs to be developed.
Disclosure of Invention
Technical problem to be solved
The technical problem to be solved by the invention is as follows: aiming at a vehicle electronic information system architecture based on integrated core processing, a video control method of integrated management and distributed service is provided, so that the problems that the video service management is dispersed, the reliability and robustness are not high, the service software cannot be dynamically reconstructed and the real-time performance of universal video transmission is not high in the conventional server-client mode based on networking are solved; on the other hand, the problems that the point-to-point video mode has high requirement on the processing capacity of a display control computer, the system is not open, the system is not flexible and the fault tolerance is low are solved.
(II) technical scheme
In order to solve the technical problem, the invention provides a video control method in a vehicle electronic information system.
One aspect of the present invention provides a video control method in a vehicle electronic information system, including the steps of:
(1) initializing;
after the video service management program is started, acquiring the online working state, name and address of each vehicle-mounted video acquisition device, the type, name and parameter of each vehicle-mounted video and the video acquisition device where each vehicle-mounted video is located, the online state, name and address of each display terminal computer, and initializing the on-demand mapping relation table of each vehicle-mounted video and each display terminal computer, and then entering step 2;
(2) waiting for a video request;
the video service management program waits for a request initiated by a display terminal computer, a system management program or module or other allowed vehicle-mounted networking equipment, and if the request exits, the step 5 is carried out; if the video request is received, checking the validity of the video request, updating and reading the latest online state of the network equipment, judging whether the online state meets the condition for executing the video request, if the online state meets the condition for executing the video request, entering the step 3, and if the online state does not meet the condition for executing the video request, continuing to wait;
(3) generating a control command;
the video service management program generates one or a group of control commands for the video acquisition equipment related to the video request after analyzing and processing the video request and then enters step 4;
(4) sending a command and waiting for timeout;
the video service management program sends control command information of video acquisition equipment related to the video request one by one, after each sending, overtime is set to wait for feedback of the video acquisition equipment, after the feedback or overtime is received, an on-demand mapping relation table of the video and a display terminal computer is updated, after all commands are sent, the current video on-demand state is informed to the display terminal computer in the vehicle information network, and then the step 2 is returned;
(5) withdrawing;
and the video service management program releases all resources and exits the program.
Further, in the step (2), the video request includes a request to open a video, close a video, and switch a video.
Further, in the step (2), the online state of the network device includes an online state of the video capture device and an online state of the display terminal computer.
Another aspect of the present invention provides a video control apparatus in a vehicle electronic information system, including: one or more video acquisition devices, an on-board computer running a video service management program, one or more display terminal computers; the video acquisition equipment can acquire one or more paths of white light/infrared/radar/low-light or other videos; the vehicle-mounted computer running the video service management program has the functions of communicating with all the video acquisition equipment, controlling the video acquisition equipment to output, close and switch videos, and can carry out fault recovery or cross-computer software dynamic reconstruction; the passenger or the carrier can initiate the opening, closing and switching of the vehicle-mounted video through the vehicle-mounted computer, and receive and display the video.
(III) advantageous effects
The invention has the advantages that the centralized program management and control of all videos in the vehicle electronic information system are realized, the vehicle electronic information system architecture based on the comprehensive core processing can be seamlessly integrated, meanwhile, the program also has the capabilities of fault recovery and dynamic reconfiguration, the traditional video service and the video equipment are decoupled, the universality and the flexibility are increased, and a more flexible management and use mode is provided for the vehicle-mounted video service.
Drawings
FIG. 1 is a flow chart of a method according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a video capture device, a video service management program, and a display terminal computer in a vehicle network according to the present invention.
In the figure: 1. video 1; 2. video 2; 3. a video 3; 4. video 4; 5. video 5; 6. a video capture device 1; 7. a video capture device 2; 8. an on-board computer running a video service management program; 9. a display terminal computer 1; 10. a display terminal computer 2; 11. a display terminal computer 3;
Detailed Description
In order to make the objects, contents, and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.
Referring to fig. 1, a video control method in a vehicle electronic information system includes the steps of:
(1) initializing;
after the video service management program is started, acquiring the online working state, name and address of each vehicle-mounted video acquisition device, the type, name and parameter of each vehicle-mounted video and the video acquisition device where each vehicle-mounted video is located, the online state, name and address of each display terminal computer, and initializing the on-demand mapping relation table of each vehicle-mounted video and each display terminal computer, and then entering step 2;
(2) waiting for a video request;
the video service management program waits for a request initiated by a display terminal computer, a system management program or module or other allowed vehicle-mounted networking equipment, and if the request exits, the step 5 is carried out; if the video request is the video request, checking the validity of the video request, wherein the video request comprises the request of opening a video, closing the video, switching the video, updating and reading the latest online state of the network equipment, the online state of the network equipment comprises the online state of video acquisition equipment and the online state of a display terminal computer, judging whether the condition for executing the video request is met, if the condition is normally executed, entering the step 3, and if not, continuing to wait;
(3) generating a control command;
the video service management program generates one or a group of control commands for the video acquisition equipment related to the video request after analyzing and processing the video request and then enters step 4;
(4) sending a command and waiting for timeout;
the video service management program sends control command information of video acquisition equipment related to the video request one by one, after each sending, overtime is set to wait for feedback of the video acquisition equipment, after the feedback or overtime is received, an on-demand mapping relation table of the video and a display terminal computer is updated, after all commands are sent, the current video on-demand state is informed to the display terminal computer in the vehicle information network, and then the step 2 is returned;
(5) withdrawing;
and the video service management program releases all resources and exits the program.
The present invention also provides a video control apparatus in a vehicle electronic information system, including: one or more video acquisition devices, an on-board computer running a video service management program, one or more display terminal computers; the video acquisition equipment can acquire one or more paths of white light/infrared/radar/low-light or other videos; the vehicle-mounted computer running the video service management program has the functions of communicating with all the video acquisition equipment, controlling the video acquisition equipment to output, close and switch videos, and can carry out fault recovery or cross-computer software dynamic reconstruction; the passenger or the carrier can initiate the opening, closing and switching of the vehicle-mounted video through the vehicle-mounted computer, and receive and display the video.
The present invention will be described in detail below with reference to specific examples.
Assume that fig. 2 is a vehicle information network associated with a video service, where there are 2 video capture devices in the network, each device containing a different number of video sources, 1 on-board computer running a video service management program and 3 display terminal computers.
(1) Video service manager initialization
In the initialization process of the video service management program, according to the network state, the online state table of the device is as follows:
TABLE 1 Equipment Online status Table
Addresses are simplified in the table.
The video service management program initializes a corresponding table of the video and the acquisition equipment as shown below, and the table can also be fixed in the system design period;
table 2 video and acquisition equipment correspondence table
The video service management program initializes the video corresponding table requested by each display terminal computer as shown below, and the system is initialized to be empty when being electrified;
TABLE 3 video watch for displaying terminal computer on demand
The video service management program initializes a display terminal computer corresponding table sent by each video as shown below, and the system is powered on and initialized to be null;
table 4 video transmission table
(2) Waiting for video request procedure
The video service manager enters the process of waiting for a video request, assuming that 4 video requests are received, respectively, as shown in the following table:
TABLE 5 assumed 4 video requests
In addition, in this embodiment, it is assumed that a disconnection or the like does not occur during the operation of the system. These 4 requests will result in 4 loops of waiting video request procedure-control command generation procedure-command generation and timeout waiting procedure.
(3) Control command generation process
The video service manager generates 4 sets of control commands in each step cycle according to the video request of table 5 as shown in the following table:
table 6 video control command table
Where both group 3 and group 4 contain 2 actual video control commands.
(4) Command sending and timeout waiting procedure
In this embodiment, assuming that each group of commands in the 4 request cycles can be successfully executed, the display terminal computer video-on-demand table and the display terminal computer video-on-demand table are updated after each successful execution, where the changes are listed as follows:
after the first successful request:
the terminal 1: video 1
video 1: terminal 1
After the second successful request:
the terminal 1: video 1
And (3) the terminal 2: video 1
video 1: terminal 1, terminal 2
After the third successful request:
the terminal 1: video 1
And (3) the terminal 2: video 4
video 1: terminal 1
And 4, video 4: terminal 2
After the fourth successful request:
a terminal 1: video 4
And (3) the terminal 2: video 4
and 4, video 4: terminal 1, terminal 2
In addition, if any one video control command is unsuccessful, the status is not changed. In addition, in the process of video on demand, because the video acquisition equipment and the display terminal computer are disconnected, a request for checking the network can be sent to the video service management program at the moment, the online state of the equipment in the current network is determined, and useless video transmission is closed in time.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (2)
1. A video control method in a vehicle electronic information system is characterized by comprising the following steps:
(1) initializing;
after the video service management program is started, acquiring the online working state, name and address of each vehicle-mounted video acquisition device, the type, name and parameter of each vehicle-mounted video and the video acquisition device where each vehicle-mounted video is located, the online state, name and address of each display terminal computer, and initializing the on-demand mapping relation table of each vehicle-mounted video and each display terminal computer, and then entering step 2;
(2) waiting for a video request;
the video service management program waits for a request initiated by a display terminal computer, a system management program or module or other allowed vehicle-mounted networking equipment, and if the request exits, the step 5 is carried out; if the video request is received, checking the validity of the video request, updating and reading the latest online state of the network equipment, judging whether the online state meets the condition for executing the video request, if the online state meets the condition for executing the video request, entering the step 3, and if the online state does not meet the condition for executing the video request, continuing to wait;
the video request comprises a request for opening a video, closing the video and switching the video; the online state of the network equipment comprises the online state of the video acquisition equipment and the online state of a display terminal computer;
(3) generating a control command;
the video service management program generates one or a group of control commands for the video acquisition equipment related to the video request after analyzing and processing the video request and then enters step 4;
(4) sending a command and waiting for timeout;
the video service management program sends control command information of video acquisition equipment related to the video request one by one, after each sending, overtime is set to wait for feedback of the video acquisition equipment, after the feedback or overtime is received, an on-demand mapping relation table of the video and a display terminal computer is updated, after all commands are sent, the current video on-demand state is informed to the display terminal computer in the vehicle information network, and then the step 2 is returned;
(5) withdrawing;
and the video service management program releases all resources and exits the program.
2. A video control apparatus that implements the video control method in the vehicle electronic information system according to claim 1, characterized by comprising: one or more video acquisition devices, an on-board computer running a video service management program, one or more display terminal computers; the video acquisition equipment can acquire one or more paths of white light/infrared/radar/low-light or other videos; the vehicle-mounted computer running the video service management program has the functions of communicating with all the video acquisition equipment, controlling the video acquisition equipment to output, close and switch videos, and can carry out fault recovery or cross-computer software dynamic reconstruction; the passenger or the carrier can initiate the opening, closing and switching of the vehicle-mounted video through the vehicle-mounted computer, and receive and display the video.
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| CN112822524A (en) * | 2021-01-05 | 2021-05-18 | 株洲中车时代电气股份有限公司 | Real-time on-demand method, device and system for locomotive-mounted video and server |
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| CN101013980A (en) * | 2006-10-30 | 2007-08-08 | 上海广电（集团）有限公司中央研究院 | Media player system based on remote control |
| CN203859844U (en) * | 2014-05-27 | 2014-10-01 | 广州齐骏电子有限公司 | Wireless network vehicle-mounted information servo system |
| CN107592557A (en) * | 2017-09-27 | 2018-01-16 | 扬州晶视科技发展有限公司 | Special passenger car carries VOD system |
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