CN111526400A - Multimedia control system applied to train - Google Patents
Multimedia control system applied to train Download PDFInfo
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- CN111526400A CN111526400A CN202010373359.9A CN202010373359A CN111526400A CN 111526400 A CN111526400 A CN 111526400A CN 202010373359 A CN202010373359 A CN 202010373359A CN 111526400 A CN111526400 A CN 111526400A
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- train
- media
- playing
- video stream
- controller
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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
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/414—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance
- H04N21/41422—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance located in transportation means, e.g. personal vehicle
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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
- H04N21/218—Source of audio or video content, e.g. local disk arrays
- H04N21/2187—Live feed
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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
- H04N21/458—Scheduling content for creating a personalised stream, e.g. by combining a locally stored advertisement with an incoming stream; Updating operations, e.g. for OS modules ; time-related management operations
- H04N21/4586—Content update operation triggered locally, e.g. by comparing the version of software modules in a DVB carousel to the version stored locally
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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]
- H04N21/60—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
- H04N21/637—Control signals issued by the client directed to the server or network components
- H04N21/6375—Control signals issued by the client directed to the server or network components for requesting retransmission, e.g. of data packets lost or corrupted during transmission from server
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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]
- H04N21/60—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
- H04N21/64—Addressing
- H04N21/6405—Multicasting
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Databases & Information Systems (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a train multimedia control system, and particularly relates to the field of multimedia control. The invention realizes the automatic switching between the train media player playing center and the local video of the train by simultaneously receiving the media video file and the video stream from the center and selecting the playing center video stream or pushing the media file to the video stream according to the playing instruction, provides the arrangement of the train playing list and the automatic updating of the media file, and initiates a retransmission request to the center video stream transmitter through the wireless transceiver when the condition that the data packet is lost when the center video stream is received by the train media playing controller so as to acquire the lost data packet and ensure the completeness and smoothness of the train media playing. The train media playing controller simultaneously pushes video streams to all train media players on the train to ensure the synchronous effect of the train media playing.
Description
Technical Field
The invention relates to the technical field of multimedia control, in particular to a multimedia control system applied to a train.
Background
In the modernization process of china, china railways are playing an increasing role, and the provision of multimedia information services on passenger trains has become a reality in europe and north america, and even in indian railways. The multimedia information system can improve the intelligent centralized dispatching of the updating and updating of railway passenger train hardware and the operation management, improve the service conditions of the passenger train, provide convenient electronic commerce service for passengers, greatly enrich the travel life and work requirements of passengers, enable the traditional railway train to generate modernized vigorous opportunity, has important significance for ensuring the safe operation of the train and improving the railway operation competitiveness, simultaneously has great significance for better adapting to the railway crossing development and accelerating the modernized great strategy in China, and can generate huge social benefit and economic benefit.
At present, the train multimedia control is in a mode of playing live broadcast of a ground control center or playing local media files of train media, and the two modes cannot be automatically switched in actual train operation; when the train adopts a center live broadcast mode, because the video stream from the ground control center is transmitted to the train, the video stream needs to pass through train-ground wireless transmission networks (such as WLAN and LTE), the train-ground wireless transmission has instability, and particularly, under the condition that the train runs at high speed, a data packet received by a train media player on the train is lost, so that the conditions of screen splash, screen blocking and even no playing can be caused when the train plays the center video media stream; this seriously affects the riding experience of passengers and the train operation image; the train media playing controller plays the local media file in a mode that when the media file needs to be replaced, a train needs to be manually logged on after the train stops operating, and a large amount of manpower and time are consumed; the train media playing controller plays the local media file in a way of generally adopting a media circulation playing way, which cannot meet the requirement of playing different videos in different time periods
Disclosure of Invention
In order to overcome the above-mentioned defects in the prior art, an embodiment of the present invention provides a multimedia control system applied to a train, and the technical problems to be solved by the present invention are: the problems that the current train multimedia playing control mode is single, the live video streaming effect of a train playing center is poor, the updating mode of the media files played by the train is lagged, and the train media playing can not be arranged according to multiple time periods are solved.
In order to achieve the purpose, the invention provides the following technical scheme: a multimedia control system applied to a train comprises a media playing editor, a central video stream transmitter, a wireless transceiver, a train media playing controller and a train media player;
the media playing editor adopts javascript and combines an MVC mode to construct a B/S three-layer information management platform structure, and facilitates the generation of editing and arranging of train media playing contents and the sending of train media playing control instructions by providing a web browser access interface;
the central video stream transmitter receives a central video stream by adopting a TCP/IP protocol cluster UDP multicast protocol, and comprises an annular memory buffer area for temporarily storing a latest video stream data packet so that when a train receives the data packet loss and sends a retransmission request, the train sends the lost data packet to the designated train again;
the wireless transceiver is connected with the train media playing controller and is used for transmitting the central video stream and acquiring a playing instruction and a media file from the media playing editor;
the train media playing controller also comprises a time counter which is connected with the wireless transceiver to access an editing platform of the train media playing controller at regular time, acquire playing control instructions and media files, schedule different media at different time in combination with the time counter and push the train media player to play;
and the train media player is used for receiving the media video stream pushed by the train media playing controller and playing and displaying the media video stream.
In a preferred embodiment, the media playing editor includes a human-machine interface, and the human-machine interface is a web interface, and is configured to upload media files required by a train, arrange playlists in time sequence, and provide a way of selecting live center video and local media file playing.
In a preferred embodiment, the ring memory buffer is configured to receive the central video stream, temporarily store the latest video stream data packet, and send the lost data packet to the designated train media playing controller again when receiving a retransmission request from a train data packet loss.
In a preferred embodiment, the central video stream transmitter sends the video stream to the train media playing controller through the wireless transceiver, and the train media playing controller obtains the latest playlist and media file through the wireless transceiver.
In a preferred embodiment, the train media playing controller regularly accesses the train media playing control editing platform in an FTP manner to obtain the latest playing command and media file, and schedules different playing manners according to the time sequence; if the mode is a live broadcasting mode, sending a video stream data packet received from the center to the train media player; and if the train media file mode is adopted, reading the local file and sending the local file to the train media player in a video streaming mode.
In a preferred embodiment, the train media player receives a video stream of the train media play controller and decodes the display output.
The invention has the technical effects and advantages that:
1. the invention realizes the automatic switching of the train media player playing center and the local video of the train by simultaneously receiving the media video file and the video stream from the center and selecting the playing center video stream or pushing the media file to the video stream according to the playing instruction, thereby providing the arrangement of a train playing list and the automatic updating of the media file;
2. when the train media playing controller receives the condition that the data packet is lost in the central video stream, the invention can initiate a retransmission request to the central video stream transmitter through the wireless transceiver to acquire the lost data packet, thereby ensuring the completeness and smoothness of the train media playing. The train media playing controller simultaneously pushes video streams to all train media players on the train to ensure the synchronous effect of the train media playing.
3. The play list and the media files of the train media play controller are automatically obtained from the media play editor, so that the train media files can be updated conveniently.
Drawings
Fig. 1 is a schematic view of the overall module structure of the present invention.
FIG. 2 is a schematic overall flow chart of the present invention.
The reference signs are: 1 media playing editor, 2 central video stream transmitter, 3 wireless transceiver, 4 train media playing controller, 5 train media player.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a multimedia control system applied to a train, which comprises a media playing editor 1, a central video stream transmitter 2, a wireless transceiver 3, a train media playing controller 4 and a train media player 5;
the media playing editor 1 adopts javascript and combines an MVC mode to construct a B/S three-layer information management platform structure, and facilitates the generation of editing and arranging of train media playing contents and the transmission of train media playing control instructions by providing a web browser access interface;
the central video stream transmitter 2 receives a central video stream by adopting a TCP/IP protocol cluster UDP multicast protocol, and the central video stream transmitter 2 comprises an annular memory buffer area which is used for temporarily storing a latest video stream data packet so that when a train receives the data packet loss and sends a retransmission request, the train sends the lost data packet to the designated train again;
the wireless transceiver 3 is connected with the train media playing controller 4 and is used for transmitting the central video stream and acquiring a playing instruction and a media file from the media playing editor 1;
the train media playing controller 4 further comprises a time counter which is connected with the wireless transceiver 3 to access an editing platform of the train media playing controller 4 regularly, acquire playing control instructions and media files, schedule different media at different times by combining the time counter and push a train media player 5 to play;
the train media player 5 is used for receiving the media video stream pushed by the train media playing controller 4 and playing and displaying the media video stream.
The media playing editor 1 comprises a man-machine operation interface which is a web operation interface and is used for uploading media files required by a train, arranging a playlist according to a time sequence and providing a mode of selecting center video live broadcast and media file local playing, the annular memory buffer area is used for receiving center video streams and temporarily storing latest video stream data packets, when a retransmission request sent by the loss of the train data packets is received, the lost data packets are sent to a designated train media playing controller 4 again, the center video stream transmitter 2 sends video streams to the train media playing controller 4 through a wireless transceiver 3, the train media playing controller 4 obtains the latest playlist and media files through the wireless transceiver 3, and the train media playing controller 4 regularly accesses a train media playing control editing platform in an FTP mode, to obtain the latest playing command and media file, and to schedule different playing modes according to the time sequence; if the mode is the live broadcast mode, sending a video stream data packet received from the center to the train media player 5; if the train media playing controller is in the train local media file mode, the local file is read and sent to the train media player 5 in a video stream mode, and the train media player 5 receives the video stream of the train media playing controller 4, decodes the video stream, displays the video stream and outputs the decoded video stream.
As shown in fig. 1-2, the embodiment specifically is: using a train media playing editor 1 to upload media files required by a train, arranging a playlist according to a time sequence, providing a mode of selecting central video live broadcast and media files for local playing, receiving a central video stream by a central video stream transmitter 2, temporarily storing recent video stream data packets, sending lost data packets to a designated train media playing controller 4 again when receiving a retransmission request sent by the loss of train data packets, sending a video stream to the train media playing controller 4 by the central video stream transmitter 2 through a wireless transceiver 3, obtaining the latest playlist and media files by the train media playing controller 4 through the wireless transceiver 3, accessing a train media playing control editing platform by the train media playing controller 4 in a timed mode in order to obtain the latest playing command and media files, if the mode is an FTP mode, send the video stream packets received from the center to the train media player 5; if the local file is in a train local media file mode, the local file is read and sent to the train media player 5 in a video stream (ts over udp) mode, the arrangement of a train play list and the automatic updating of the media file are provided, a lost data packet of a central video stream is made up in a packet loss retransmission mode, and a video needing to be played is scheduled according to time, so that the method has the advantages of high flexibility, convenience in operation, high video playing quality and the like.
The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;
secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the invention, only the structures related to the disclosed embodiments are referred to, other structures can refer to common designs, and the same embodiment and different embodiments of the invention can be combined with each other without conflict;
and finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.
Claims (6)
1. The utility model provides a be applied to train multimedia control system which characterized in that: the system comprises a media playing editor (1), a central video stream transmitter (2), a wireless transceiver (3), a train media playing controller (4) and a train media player (5);
the media playing editor (1) adopts javascript and combines an MVC mode to construct a B/S three-layer information management platform structure, and provides a web browser access interface;
the central video stream transmitter (2) receives a central video stream by adopting a TCP/IP protocol cluster UDP multicast protocol, and the central video stream transmitter (2) comprises an annular memory buffer area for temporarily storing a nearest video stream data packet;
the wireless transceiver (3) is connected with the train media playing controller (4) and is used for transmitting the central video stream and acquiring a playing instruction and a media file from the media playing editor (1);
the train media playing controller (4) also comprises a time counter which is connected with the wireless transceiver (3) to access an editing platform of the train media playing controller (4) at regular time, acquire playing control instructions and media files, schedule different media at different time by combining the time counter and push a train media player (5) to play;
the train media player (5) is used for receiving the media video stream pushed by the train media playing controller (4) and playing and displaying the media video stream.
2. The multimedia control system applied to the train as claimed in claim 1, wherein: the media playing editor (1) comprises a human-computer operation interface which is a web operation interface and is used for uploading media files required by a train, arranging a playlist according to time sequence and providing a mode for selecting center video live broadcast and local media file playing.
3. The multimedia control system applied to the train as claimed in claim 1, wherein: the annular memory buffer area is used for receiving the central video stream, temporarily storing the latest video stream data packet, and sending the lost data packet to the appointed train media play controller (4) again when receiving a retransmission request sent by the loss of the train data packet.
4. The multimedia control system applied to the train as claimed in claim 1, wherein: the central video stream transmitter (2) sends video streams to the train media playing controller (4) through the wireless transceiver (3), and the train media playing controller (4) acquires the latest play list and media files through the wireless transceiver (3).
5. The multimedia control system applied to the train as claimed in claim 1, wherein: the train media playing controller (4) regularly accesses the train media playing control editing platform in an FTP mode to acquire the latest playing command and the latest media file, and schedules different playing modes according to time sequence.
6. The multimedia control system applied to the train as claimed in claim 1, wherein: and the train media player (5) receives the video stream of the train media play controller (4), decodes the video stream, displays the decoded video stream and outputs the decoded video stream.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010373359.9A CN111526400B (en) | 2020-05-06 | 2020-05-06 | Multimedia control system applied to train |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010373359.9A CN111526400B (en) | 2020-05-06 | 2020-05-06 | Multimedia control system applied to train |
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| CN111526400A true CN111526400A (en) | 2020-08-11 |
| CN111526400B CN111526400B (en) | 2021-02-19 |
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| CN202010373359.9A Active CN111526400B (en) | 2020-05-06 | 2020-05-06 | Multimedia control system applied to train |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112911333A (en) * | 2021-01-21 | 2021-06-04 | 中新软件（上海）有限公司 | Information display system and method based on transparent OLED |
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| CN111526400B (en) | 2021-02-19 |
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Denomination of invention: A multimedia control system for train Effective date of registration: 20210927 Granted publication date: 20210219 Pledgee: Bank of Communications Ltd. Shanghai Xuhui sub branch Pledgor: SHANGHAI MISSION INFORMTION TECHNOLOGIES Co.,Ltd. Registration number: Y2021310000084 |
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