Multi-function walkie-talkie manufacturer's single chip microcomputer digital coding technology

Multi-function walkie-talkie manufacturer "one-click" emergency assistance intercom system for use by passers-by. When a passer-by encounters robbery and personal injury, it uses the alarm device to report to the nearest local police station for emergency. When the police station finds an abnormal situation in the monitoring, it can proactively shout, deter or expel criminals, single-chip digital coding technology, learning code, stable, wireless receiving distance. far. High-brightness LED dot matrix display, indoor visual distance greater than 50 meters. High-strength alloy shell, luxurious and generous, durable. Integrated assessment hardware module, and computer software links to attendance assessment. Multi-functional walkie-talkie manufacturers from the traditional bus to all-digital intercom is a worldwide technological trend, and all-digital products are a revolutionary alternative to video intercom. In the traditional bus-based building intercom system, when designing the system, whether it is the “switcher+matrix” or the “switcher+selector” approach, the location of the center of the community, the direction of the weak current network diagram, and the influence of strong electric equipment should all be considered. Many types of factors. The use of TCP/IP intercom system can not only directly use the mature community LAN, but also self-built LAN, especially in the use of community mature local area network, without wiring has unparalleled advantages.

Multi-function walkie-talkie manufacturers In digital walkie-talkies, analog voice signals are first converted to digital signals through A/D conversion and speech coding. Since the bandwidth of digital walkie-talkies is relatively narrow, it is usually 12.5 kHz or 6.25 kHz (12.5 kHz or 25 kHz for analog). Therefore, the voice coding in digital walkie-talkies generally adopts a parametric coding method, that is, instead of coding the waveform of the voice signal, it is The characteristic parameters of the generated speech signal are extracted and the characteristic parameters are encoded and transmitted. The transmission rate is generally 1.2 to 4.8 kb/s, which can satisfy the bandwidth requirement of the digital intercom.

Multi-function walkie-talkie manufacturer's system call, alarm, information release, and household access functions are supported by a single Category 5 cable, and the wire cost is reduced by 50%; and the plug-in connector and standard RJ-45 interface are used for wiring, which is extremely easy to maintain. Installation man-hours are significantly shortened. At the same time, the failure rate caused by misoperation is also greatly reduced; the system adds alarms, information release and other functions do not need to increase the corresponding module, the equipment cost is greatly reduced. Multi-function walkie-talkie manufacturers have many networking devices in the traditional bus-based building intercom system, such as switchers, information storage, selectors, and matrices. When any device fails, commissioning quantities will increase, and such intermediate devices can only be provided by manufacturers. Replacement depends on the manufacturer. The TCP/IP building intercom system adopts the standard TCP/IP protocol, which eliminates many intermediate devices such as switchers and selectors of the intercom system, reducing system complexity and facilitating debugging. As for the local area network of the TCP/IP intercom system, routers, switches, etc. are common products on the market, and configuration and replacement are easy.

Compared with analog walkie-talkies, multi-function walkie-talkie manufacturers believe that digital walkie-talkies have strong anti-interference ability, good call quality, high frequency utilization, good confidentiality performance, support for data services, easy error-free relaying, and convenient use of a set of numbers. Following the system and other characteristics, multi-function walkie-talkie manufacturers meet the laws of communication development. Undoubtedly, digital walkie-talkies are the development direction of walkie-talkie technology and will inevitably gradually replace analog walkie-talkies.

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