基于dsPIC33F的數(shù)字對講機的研究與實現(xiàn)
[Abstract]:Digital trunking communication system not only has all the functions of personal communication, but also can control and realize any communication between individuals and groups. The system has high confidentiality and rich functions, and realizes the intelligentization of communication function. This paper introduces the design of digital interphone for terminal equipment of digital trunking system. The hardware environment of this system is the dsPIC33F series microcontroller and the corresponding Explorer 16 development board, which is newly introduced by Microchip Company. WM8510 is selected as the speech codec chip. Taking C language and assembly language as software development language, the design scheme of digital interphone system terminal based on this foundation is determined. DsPIC33F series single chip microcomputer is a series of low price and excellent performance single chip microcomputer collection. It realizes the seamless integration of single chip microcomputer control ability and digital signal processing ability, which is very suitable for the development and use of this system. Corresponding to the Explorer 16 development board, is also excellent performance and low-cost products. This hardware environment can greatly reduce its cost under the premise of effective digital intercom function. The primary purpose of digital interphone design is to reduce the cost so that more people can enjoy private mobile communication network. In this paper, the software of each function module used in the digital interphone is designed, and the structure of the digital interphone system, the voice activity detection and the speech transmission process are designed and implemented. G. 711 standard is adopted as frame data coding standard, and speech coding is realized by A law PCM coding method. The whole system is debugged and verified by experiments that the quality of voice transmission is high and can meet the demand of digital intercom on a certain scale.
【學(xué)位授予單位】:天津大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2014
【分類號】:TN929.54
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