Based On Digital Tv Set-top Boxes Of The Java Virtual Machine Basic Personal Summary Of The Transplant

With the mature development of digital television technology,interactivetelevision becomes developing direction of digital television. For realizinginteractive television services such as Video-On-Demand(VOD) , interactiveadvertisement , online browsing etc, we must adopt digital television middlewaretechnology Digital television middleware technology is a core of digital television, itis indispensable to applications of interactive television.Java technology has beenfavored in the field of digital television because java is simple, safe and reliable andit has no relation with platform. Sun company has offered scheme for digitaltelevision—Java platform (CDC) and Java TV API, that offers an ideal developmentenvironment for interactive application of digital television. Java technology hasbeen adopted by China as part of the digital television middleware standard. JavaTV technology ,it allows a new opportunity for the development of digitaltelevision industry in China.Based on primary porting of CDC ,which is the simplest configuraion of J2ME,to our digital TV set-top-box, we make use of the Reclocatable Code Unitmechanism of ST-OS20 that run on our digital TV set-top-box as the embededrealtime operating system to implement the class loading function of the referencecode.This brings not only the modularization of the implement code but alsoestablishes the basis for later porting of Personal Basis Profile to set-top-box.For the purpose of providing windows and image showing related functions, weintegret the OSD drivers of our set-top-box to implement the native windows andimage library ,making our primary success of the porting of Personal BasisProfile.This can provides standard API to upper application programe.