Based The Mp3 Aircraft Voice Warning System Design

In recent years for the whole level of the exaltation our country aviation industry, the nation purchased a great deal of advanced airplane from the abroad. In the daily usage process, the malfunction rate of the electronics equipments of airplane is higher, for the technique protection of the outside the country, we can't deeply maintain the malfuncting equipment, the common use way of doing it is to replace them, a buying price of equipment usually is the a few decuple of its cost, so will result the exaltation of maintain cost, so the nation need to carry on national product, on the other hand is for lowering the maintenance cost, on the other hand is for improving our country aviation electronics technique level.Under the background of the some new airplane national product, according to the speech warning system of the airplane, the adoption FPGA chip, this paper design the speech warning system that uses the MP3 decoding technique and adopt the way that soft hardware is in conjunction with a work on to the Nios II processor platform. Under the background of refer to much datum and physically grope the work of the airplane speech warning system, this paper summed up the limit value to external malfunction signals and warning mechanism of the airplane speech warning system, and used a hardware module to realize them adopting the Verilog language.The warning speech adoption MP3 coding format carry on saving, the MP3 decoding calculation is very complicated, on the Nios II processor platform to adopt pure software to realize it have certain of not fluency, at the system design MP3 decoding calculation carried on decomposition, adopting the way that the software and hardware combine together to complete the MP3 decodings of the warning speech.For the speech warning system equipped RS-232 port, used for the warning speech to download the speech warning system.