基于新型二步索引算法OSD电路的FPGA实现

FPGA implementation of OSD based on new two-step-index algorithm

采用新型二步索引算法实现了一种字符索引结构的OSD电路。该算法是在改进型二步索引算法的基础上,为实现OSD界面的多区域字符灵活显示而进行优化的算法,通过引入字符显示区编号,使得该算法在实现字符二步索引时更加方便。基于该算法的OSD电路在保留原算法电路优点的基础上实现了各行字符显示的独立性,使得字符显示更加灵活。通过FPGA进行了电路功能验证,证实了本算法的可行性。

Using the new two-step algorithm,a kind of character index structure of OSD circuit is achieved.The algorithm is optimized based on the improved two-step indexing algorithms to display character more flexibly on screen,character display areas are defined and numbered,so that the two-step-index process is more straightforward.OSD circuit based on the new algorithm achieves the independence of each line character display,making characters appear more flexible while it retains the advantages of OSD circuit based on the original algorithm.The new structure of OSD circuit passes the function verification with FPGA,and it proves the new algorithm to be available.