Central controller of vehicle-mounted broadcasting equipment

Abstract

The invention relates to a central controller of vehicle-mounted broadcasting equipment. The core components of the central controller consist of a microprocessor, an audio coding and decoding chip, an SD card, an analog switch, a UIC568 bus, an MVB gateway, and a volume adjusting unit. The central controller defaults to ethernet network-based various audio data transmission. When a fault occurs at the ethernet network of the vehicle-mounted broadcasting equipment of the train, the central controller switches an audio signal transmission access into the UIC568 bus for transmitting the analog audio signal automatically by an ethernet network way. According to the invention, with the central controller, the defect that the previous products only support digital ethernet network-based data transmission can be overcome; the broadcasting system reliability is enhanced; and the train running security is improved. Moreover, the analog switch is used for carrying out audio source switching, so that not only the noises of the relay motion are eliminated but also the system cost is lowered.

Description

technical field [0001] The invention relates to a broadcasting equipment controller, in particular to a vehicle-mounted broadcasting equipment central controller in the rail transit field. Background technique [0002] With the rapid development of the railway industry, various on-board equipment on trains are also developing in the direction of informatization, intelligence and networking. Car radio equipment is the basis for realizing informatization and intelligence. [0003] The central controller of the on-board broadcasting equipment is an important part of the train broadcasting system, which is usually installed in the server of the train driver's cab. The central controller of the on-board broadcasting equipment mainly realizes functions such as audio station announcement data decoding, data transmission, and multi-channel audio source switching. [0004] At present, the central controller of the traditional vehicle broadcasting equipment can only analyze the audi...

AI Technical Summary

Problems solved by technology

[0004] At present, the central controller of traditional vehicle broadcasting equipment can only analyze audio data files in WAV format, and transmit audio signals through a single analog bus

Once the analog bus is abnormal, it will cause the car radio equipment to fail to perform normal station announcement broadcast

In addition, the central controller of the traditional vehicle-mounted PA equipment uses relays to switch multiple audio sources. Using relays to switch audio sources will easily cause the PA system to emit "click" noise, which affects the passenger experience.

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