A video-on-demand method and system for urban rail trains

A technology for urban rail trains and video-on-demand, which is applied in the field of communication and can solve the problem of insufficient video streaming bandwidth.

Active Publication Date: 2019-03-05
GUANGZHOU METRO GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, provide a kind of video-on-demand method and system for urban rail trains, by realizing the video transmission system of rail transit vehicles using RTSP protocol for transmission based on H264 video compression, Combined with passenger change information detection, it solves the problem of insufficient video streaming bandwidth

Method used

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  • A video-on-demand method and system for urban rail trains
  • A video-on-demand method and system for urban rail trains
  • A video-on-demand method and system for urban rail trains

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Embodiment 1

[0020] Before introducing the specific implementation process, it is necessary to introduce the networking environment of this embodiment.

[0021] Urban rail train video transmission network such as figure 1 shown. According to the symmetrical structure of urban rail train carriages, the physical structure of the train is given. The camera is connected to the front-end image processor through the universal serial bus in the vehicle network, and the front-end image processor is connected to the diagnostic service host through the Ethernet of the vehicle network. The diagnostic service host is a collection of on-board servers, a server cluster serving train safety information monitoring and processing, including servers for passenger changes. It connects the vehicle-mounted wireless communication host and the real-time channel unit through the train safety detection network, and the real-time channel unit sends data to the ground in real time through WiMAX, thereby realizing ...

Embodiment 2

[0046] Figure 4 Yes, the system composition diagram, such as Figure 4 As shown, the system includes:

[0047] The storage unit 201 is used to store the video sensor data in the video information pool, and generate a preview of the video information, and the video information pool is a Redis database;

[0048] A compression unit 202, configured to compress video information through the H.264 image compression standard;

[0049] The transmission unit 203 is configured to use the real-time streaming protocol RTSP to transmit the compressed video stream.

[0050] The system also includes a control unit, which is used to define the SWITCH method in the transmission session layer, and control the video switching by carrying parameters, and the control direction is from the client to the server, so that when the operating client sends a SWITCH operation request, the flow control Layers can switch screens in real time without re-establishing the connection.

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Abstract

In order to conveniently process and transmit abnormal action video information of train passengers, a wideband train safety detection network based on TCP / IP needs to be used instead of a traditional train TCN. Due to the fact that a video on demand system shares network bandwidths with other systems such as a walking system failure diagnosis system and an auxiliary system failure diagnosis system, and the network packet loss, video transmission congestion and other results are caused when a low-efficiency compression and transmission mode is used. Considering the factors, a solution is put forward, original bitmap data of video continuous frames are encoded and compressed, data cache and data persistence are carried out through a real-time database, transmission is achieved through an RTSP on an RTP and a TCP, and a train video flow transmitting algorithm of train-ground wireless on demand is supported.

Description

technical field [0001] The invention relates to the communication field, in particular to a video-on-demand method and system for urban rail trains. Background technique [0002] With the development of urban rail trains, the establishment of an urban rail transit train safety guarantee system will be an indispensable link, but in the construction of safety detection sensor networks, there will inevitably be problems such as insufficient bandwidth and low bandwidth utilization. Video information carries passenger changes, train security and other information, and due to factors such as format, resolution, and frame rate, it will occupy a large amount of bandwidth. At present, the Passenger Information System (PIS) and CCTV system, which are widely used in urban rail trains, use independent transmission channels. The design is generally based on hardware, and the system functions are divided through hardware, such as on-board encoding server, on-board CCTV server, etc., logic...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): H04N7/18H04N21/658H04N21/6437
Inventor丁建隆何霖朱士友余博贾利民秦勇季常煦龙静员华范晓云张蜇
OwnerGUANGZHOU METRO GRP CO LTD