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Audio-visual system by railway or subway coach broadcasting or power-supply circuit transmission

A power line, audio and video technology, applied in the field of audio and video monitoring and audio and video playback systems, can solve problems such as inconvenient installation and poor reliability

Inactive Publication Date: 2007-09-05
北京汇拓新天科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This system solution comprehensively solves the problems of inconvenient installation and setting, poor reliability and limitations in the existing monitoring system of railway trains and subway trains by using video cables, broadband network cables or wireless LANs to transmit images.

Method used

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  • Audio-visual system by railway or subway coach broadcasting or power-supply circuit transmission
  • Audio-visual system by railway or subway coach broadcasting or power-supply circuit transmission
  • Audio-visual system by railway or subway coach broadcasting or power-supply circuit transmission

Examples

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Embodiment Construction

[0017] The carrier network camera 1 is set inside each carriage, and multiple carrier network cameras 1 are installed in each carriage. After the carrier network camera 1 compresses the audio and video signals and carries out the carrier wave processing, it passes through the existing power lines in the railway train and subway train compartment. Or the broadcast line 5 is transmitted to the monitoring center 4 installed in the command car, and the audio and video signals of each carrier network camera 1 are stored, decompressed and monitored in real time by the monitoring center 4 .

[0018] The carrier network transceiver 3 and the wireless receiving display 2 are arranged on the interior of each compartment, and a carrier network transceiver 3 and a plurality of wireless receiving displays 2 are installed in each compartment, and the monitoring center 4 installed in the command compartment will send more Road audio and video signals, after being processed by compressed carri...

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Abstract

The invention can transmits several decade routes of compressed audio and video digital signals on power line, broadcast cable or other kind of cables while not effecting the operations of other devices on said lines or cables. Due to the interference produced by trains, the invention uses the frequency letting-by technology and the contention resolution technology to make OFDM ultra-wideband carrier wave technology have higher anti-interference capability. The invention can be realized on the power line or broadcast cable used by railway train and underground railway station.

Description

Technical field: [0001] The invention relates to a train video monitoring and video playing system, in particular to a system for realizing audio and video monitoring and audio and video playing by using existing power lines or broadcasting lines on railway trains and subway trains Background technique: [0002] In the field of video surveillance and video playback technology for railway trains and subway trains, there have been many national patents, but the use of wired or wireless technology in many existing national patents cannot really fully solve the problem of video surveillance and video playback for trains , due to the uniqueness of the train carriages, traditional video cables, broadband network cables, microwave or wireless LAN solutions are not feasible, the main reasons are: [0003] 1. Too many cables are not allowed in the train car; [0004] 2. Since the train cars are in motion and need to be grouped, the reliability of the cable connection between the car...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B3/54H04L27/26
Inventor 夏陵东
Owner 北京汇拓新天科技有限公司
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