基于FPGA和ADV7123的CCIR显示接口的设计和应用

Design and Application of CCIR Display Interface Based on FPGA and ADV7123

数字图像在CCIR接口监视器上正确、完整地显示,涉及到图像存储、时序的构建、数字图像的制式转换和数字图像的模拟处理。提出一种能够广泛应用的CCIR接口方案,详细阐述了把逐行扫描的CCD图像数据通过SRAM存储转换成隔行扫描方式的数据格式,采用FPGA设计了CCIR制式的复合同步和消隐时序信号、介绍了视频D/A转换器的使用和该电路设计中的电磁兼容问题。该方案可以广泛用于各种数字视频系统、高分辨率彩色图像处理和视频再现等。

Whether the digital images can be displayed completely and correctly on CCIR interface is related with image storage,construction of timing signal,standard conversions and simulations of image data.A wildly used scheme of CCIR display interface is presented,in which the progressive scanning CCD image data can be converted to be the interlaced scanning data by SRAM.The timing design of composite sync and blanking by FPGA is given.And the application of video D/A converter and the problem of electromagnetic compatibility（EMC）are expatiated.The scheme can be widely applied in digital video systems,processing of high resolution color graphics and video representations.