Urban Rail Train Voice Broadcasting and Emergency Intercom System Project:

Provide daily voice playback and timed music playback, emergency help intercom and other functional services for the whole train. The OBT IP network broadcasting system was designed in the early stage. The overall solution is as follows:

Introduction to OBT IP Network Broadcasting System

OBT IP network broadcasting system is a world-leading broadcasting system that uses computer Internet (LAN/WAN) to transmit digital audio signals: perfect, stable, convenient, CD-level sound quality, arbitrary partition combination, interactive on-demand, timing Fixed-point playback, unlimited audio source, two-way intercom, smart on/off, network alarm; where there is a network, add it at will, and do whatever you want, covering all the functions of the previous broadcasts.

Suitable for all types of broadcasting projects: airports, railways, villages, highways, large parks, large shopping malls, supermarket chains, large campuses, digital cities and other public places broadcasting projects.

The digital network public address system uses IPAudioTM technology to transmit audio signals in a standard IP packet over LAN and WAN. It is a two-way audio sound system with pure digital network transmission. It completely solves the problems of poor sound quality, complicated maintenance management and lack of interactivity in the traditional broadcasting system. The system equipment is simple to use, easy to install and expand, and only needs to connect the digital audio terminal to the computer network to form a powerful digital broadcasting system. Each access point does not need to be separately wired, and truly realizes computer network, digital video monitoring, public broadcasting. Multi-network integration.

The IP network broadcasting system is a product completely different from the conventional broadcasting system, the FM addressing broadcasting system, and the numerical control broadcasting system. Because of the digital audio technology built on the common platform of IP network and incorporating a number of proprietary intellectual property rights, it has its inherent advantages in many aspects:

Functional aspects: Each terminal can be independently controlled to play different content (for example, 200 terminals in the LAN play 200 channels simultaneously). Not only can fully realize the functions of the traditional broadcasting system (such as: regular ringing, zone play, fire alarm, etc.), but also has functions such as free on-demand terminal and two-way intercom between terminals;

Transmission: The audio transmission distance extends infinitely. It can run on the LAN and Internet network across the gateway, supporting a wide range of important applications, centralized control of broadcasting from the main campus to the sub-campus, and simultaneous broadcasting from the company headquarters to each local branch. To achieve fast and reliable information communication.

Sound quality: the output quality of the terminal is close to the CD level, and the frequency response is 20-16khz, which meets the requirements for high sound quality, such as the entrance examination, the college entrance examination, the listening test of the university's 46th and 6th grade exams, and the daily foreign language listening training in the classroom. The pronunciation can be clearly discerned and no longer plagued by ambiguous sounds.

Reliability: The server (Windows operating system) master and terminal use industrial-grade chips, working 24 hours a day, and completely immune to viruses; the instability of traditional broadcasting depends on the quality of transmission lines, IP network broadcasting For mature Ethernet hardware, each terminal is equivalent to a simple PC connected to the network without additional maintenance.

Product application range: large, middle and primary schools, highways, hotel buildings, commercial chain stores, large and medium-sized enterprises

"Digital IP Network Broadcasting System" Term Explanation: IP (Internet Protocol) is a network layer protocol in TCP/IP. The IP protocol provides a uniform IP packet format to eliminate differences in communication subnets and is used to provide an interconnection platform for various communication subnets or local area networks. A system for digitally encoding a broadcast audio signal and transmitting an IP data packet through a network, and then decoding the audio signal by the terminal, which is called a digital IP network broadcast system. With this way of working, multi-network integration can be achieved across LANs and WANs. With a powerful IP network platform, the broadcasting system has ushered in a new leap!

 

Comprehensive description of voice broadcast control and emergency intercom system for urban rail trains

1. Project overview and functional requirements:

Urban rail train voice broadcast control and emergency intercom system:

The overall train voice broadcast control and emergency intercom system solutions, the overall system requirements are as follows:

1) The system can realize the overall programmable mode to control the fixed-point voice playback, etc., and play in real time.

2) Install terminal broadcast control equipment in each compartment of the train, which can perform daily voice broadcast and music playback, etc.

3) Each button needs to be equipped with a one-button intercom function button, which can realize emergency voice two-way intercom with the train control room in case of emergency.

4) The system adopts software-based control, and the software needs to have a secondary development interface (SDK data package), which can be used for secondary development to realize system integration control.

5) The system has on-site noise detection function, which can adjust the intelligent sound effect according to the environment.

6) System equipment selection must comply with relevant national industry standards and regulations

2. System design description:

According to the functional requirements and specifications of the urban rail train voice broadcast control and emergency intercom system, the OBT IP network broadcast system was used for design and design selection in the early stage; the system uses the IP network as the data transmission medium to match the network voice broadcast control terminal in each compartment. And the emergency intercom terminal, the control room at both ends of the train matches the network paging/intercom terminal, each network type terminal has a separate network IP address, and the system uses the IP address addressing mode to perform various voice broadcasting and intercom tasks. Intelligent broadcast control, system centralized control software provides unified system services, software with SDK data package, system integrators for secondary development and use, to achieve multiple sets of systems interlocking, centralized control.

Fixed-point voice broadcast and timed play

The train control room has a voice broadcast function, which can perform real-time voice broadcast on the train at any time. The system has a timed voice broadcast function, and can perform timing voice broadcast control according to programming.

Emergency intercom function

On the upper or side of each compartment door of the train, a system emergency intercom terminal is set up, which has a one-key intercom function. When an accident occurs, the passenger can contact the train control room through the train emergency intercom button, and promptly contact the driver to facilitate the train. Staff handling and collection of emergency situations. ,

3, system voice linkage function

The system software provides a secondary development interface for the system integrator to carry out secondary development of the system. For example, the linkage with the train station automatic broadcast system is realized, and the network voice terminal device is used for automatic broadcast of the arrival station voice; linkage with the train multimedia information release system, Synchronized system audio playback control; linkage with the train emergency alarm system, linkage control network voice broadcast control system for emergency voice broadcast and manual real-time voice broadcast when the train handles alarm trigger.

 

4, permission level settings

The software can set up multiple users to use this system, which is managed by the administrator, and the administrator assigns each user the system usage account and password, the usage rights and the number of terminals. The level has a high or low level, the administrator has the highest usage rights, and only the administrator can set or change the system's setting parameters.

5, broadcast paging, voice intercom and recording storage function

The system has automatic recording and storage functions for the broadcast paging and voice intercom function. When the voice broadcast or voice intercom and the cabin request emergency intercom are started in the train control room, the system will automatically track and record the above tasks, and record the voice files. It can be automatically stored in the directory set by the system (under the control center host storage space), and the main control center can call up the recording file and monitor the playback at any time if necessary.

6, environmental monitoring function

The system can use the emergency intercom terminal to conduct environmental monitoring on the car site. In terms of the train control personnel, the train control personnel can understand the actual situation of each car and can be used in conjunction with the car monitoring system.