【摘要】 采用VHDL语言设计了一种YCb Cr422到RGB888实时视频格式转换电路,利用高速时钟同步分频机制实现了视频信号的输入和处理,采用移位计算的方法实现了硬件语言下的浮点运算,并通过双RAM缓存交替读写的时序设计完成了视频数据读写及串并转换,由于采用了逐像素点交替读写的方式,大大减少了存储资源.在Quartus II软件上进行仿真验证,结果表明所设计的电路可用于LCo S视频接口电路.更多还原

【Abstract】 This scheme used VHDL program language to design a kind of real-time video format conversion circuit from YCb Cr422 to RGB888. It used high-speed clock synchronization division mechanism to achieve the input and processing to video signals, used shift calculation to achieve the floating-point arithmetic under hardware language. And it used double RAM cache to read and write alternately, this method could complete the video data reading and writing and serial-to-parallel conversion. This pixel-by alternating reading and writing mode, greatly reduced the storage resources. Simulation on Quartus II software showed that the designed circuit could be used in LCo S video interface circuit.更多还原