Design Of Audio Remote Monitoring System Based On Internet

As the rapid development of information technology and network technology,in the area of audio, video, intelligent transportation, industrial control, spaceflightmonitoring,the application of the Internet is becoming more and more widely. In thisarticle, an audio remote monitoring system is designed based on the FPGA. In thissystem, the front processing of audio data including A/D conversion and compressioncoding action is achieved.at the same time, we also achieved the TCP/IP protocol andMAC controller in the FPGA. Finally, the data package based on the specification ofthe TCP/IP protocol can be transmitted over the Internet to the monitoring platform.In order to achieve the audio data compression encoding process, this system isdesigned using ADPCM coding algorithm in the FPGA. Adaptive Differential PulseCode Modulation (ADPCM) is an effective algorithm of speech coding. It adopts themethod of adaptive quantization and adaptive prediction to compress pulse codemodulation (PCM) signal.Achieved through the hard line logic of TCP/IP protocol, can significantlyincrease the capacity of data transmission. The FPGAs(Field Programmable GateArray)have rich programmable logic resources, that through the hardware descriptionlanguage Verilog or VHDL, can implement a variety of complex hard line logic. Theimplement of TCP/IP protocol modules with FPGA, as it is function-specifichardware modules, its processing speed is very high, the speed of data communicationcan reach more than10G,which is difficult to achieve that with the traditionalCPU-based software solutions.Now there are many kinds of intelligent and powerful FPGA development tools,by using them can complete the design from input,synthesis, implement to configurethe chip. And there are many kind of tools can complete the design of the simulation,optimization, constraints and debugging online, which make FPGA developmentcycle is shorter, faster time to market. Moreover, with the continues development ofthe FPGA, the scale are increasing, the costs continue to decrease, and the various functional modules can be made with the intellectual property of the IP core, which isvery easy to transplant functional modules.