Car Audio DVD Design And Implementation Based On Embedded

With the development of automobile production industry and electronic industry, CarAudio system has been updated and consummated continuously. The first electronic productapplied on Automobile is Car Audio. It has turned from primary Car Radio intocomprehensive multi-media carrying electronic system and it has functions of seeing andhearing, amusement, navigation, auxiliary driving. And it is becoming an indispensable partof the Automobile of the future. As one of the most famous producers of Car Audio in theworld, ALPINE Corporation in Japan plays an important role in the international marketbecause of her credible guarantee of quality and predominant price performance ratio.Car Audio is one part of Automobile. Its mostly task is providing consumersenjoyment of highly quality voice while Automobile is on the rails. In existence Alpine'ssound processing system introduces the DSP processing CMOS chip CXD2729Q controlledby the NEC V850SG2series single chip C language. It adopts the most advanced data mediatechnology referring to data signal processing and digital sound composing technology fieldnowadays, etc. It has well security and replanting.This paper is mainly referring to the software program design of DVD Module'sParental Lock function of Alpine's Car Audio. As one of the important parts, DVD Module isdirectly connected with each module. And it applies Alpine's every technology which isnecessary for developing Car Audio Software. Its function in brief is representing allfunctions of VIDEO to the consumers. For example it can prevent the children from theviolence pictures and eroticism polt. It plays an important role in the Car Audio. PARENTALFunction is equivalent to PROCESS layer of DISPLAY Module. It introduces data driver andthread control to accomplish complex display request. In parental processing system, itintroduces the LC75804CMOS chip made by SANYO Corporation in Japan. It can achievethe display of texts and dynamic pictures. Program design adopts Software Flat developedaccording to SWEPF. The language adopts NEC V850SG2series single chip C language thatis an embedded C language similar with the standard C language. And it is used in embeddedsoftware research.The PARENTAL LOCK function is a new function added to the DVD Module. You cansee the DVD only when the DVD disc's level is lower than the level that your design in theDVD driver, otherwise, the DVD driver would display a menu of input code. Only whenyou input the correct code,you can appreciate it continuously. It is a very good method toprevent the children to look at the violence pictures. So I do think that it is a good function tothe DVD MODULE.