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Controllable real-time image distribution and forwarding system for railway emergency commands

An emergency command, real-time image technology, applied in closed-circuit television systems, transmission systems, digital transmission systems, etc., can solve problems such as poor data flow in low-speed networks and underutilized high-speed networks, and achieve the effect of improving image service quality.

Inactive Publication Date: 2013-04-24
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the disadvantages that the existing distribution and forwarding system described in the above background technology cannot reasonably send data according to the network working status, the high-speed network is not fully utilized and the low-speed network data is not smooth, the present invention proposes a method for railway emergency command. Control real-time image distribution and forwarding system

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  • Controllable real-time image distribution and forwarding system for railway emergency commands

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Embodiment Construction

[0014] The preferred embodiments will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0015] Technical scheme of the present invention is:

[0016] The distribution and forwarding server unit transmits the video data composed of image sequences to the display unit according to the transmission parameters and transmission strategy of the image data selected by the display unit.

[0017] The transmission strategies that can be adjusted by the distribution and forwarding server unit are video resolution priority and action priority.

[0018] 1. Resolution priority: Adjust the video transmission frame rate on the basis of the same video resolution, thereby reducing network traffic. The adjustment method is: take the camera’s acquisition frame rate as the base frequency, and use equal frame numbers in the i...

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Abstract

The invention discloses a controllable real-time image distribution and forwarding system for railway emergency commands in the technical field of railway emergency command. The system comprises a distribution and forwarding server unit, an image source unit, a display unit and a switch. Under the condition of limiting network bandwidth, each user proposes a resolution rate priority requirement or an action priority requirement to the distribution and forwarding server unit, a distribution and forwarding server dynamically selects the resolution rate and frame frequency of an image according to the requirement to send the image. According to the invention, the individual requirements on video coherence or video quality of the display unit are met in a distribution and forwarding network with limiting bandwidth, so that network resources are fully utilized, thereby ensuring the effective operation of railway emergency commands.

Description

technical field [0001] The invention belongs to the technical field of railway emergency command, in particular to a controllable real-time image distribution and forwarding system for railway emergency command. Background technique [0002] In the emergency command of the railway system, when an emergency occurs, the management department can check the scene through the local network camera. After the network camera collects the image data, the real-time image is sent to the display units in different regional networks through the distribution and forwarding system. At present, the intranet interconnection of various business departments in my country's railway system network is mainly based on high-speed networks, while the lower-level sites are mostly based on low-speed networks due to their large and wide distribution. Therefore, the bandwidth of the network where each display unit is located is different. In addition, each business department of the railway system has ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/18H04L12/803
Inventor 胡秉谊徐建根童奥胡江海李强
Owner BEIJING JIAOTONG UNIV