基于ADV212和NiosⅡ的图像解压缩和图像字符合成

Image Decompression and Image-character Combination Based on ADV212 and NiosⅡ

给出一个基于ADV212和NiosⅡ的图像解压缩及其图像字符合成设计方案。NiosⅡ软核处理器通过I2C总线对ADV212与ADV7179进行参数配置实现图像的解压缩和D/A转换。同时NiosⅡ软核处理器还要完成字符数据的接收和处理,处理后的字符数据根据显示方法和图像数据叠加在一起,通过ADV7179进行数模转换。实验表明该设计方案达到了系统要求的各项技术指标,解决了直接采用FPGA+DSP设计复杂、开发周期长的缺点。

A image decompression and image-character combination solution is designed based on ADV212 and NiosⅡ.Image decompression and D/A conversion are realized through ADV212,ADV7179.And they are controlled by NiosII soft kernel processor with I2C bus.Simultaneously,receiving and operation of characters are done by NiosⅡ,processed characters are embedded into image data according to method of character display,and D/A conversion of them is performed through ADV7179.Some tests prove that all required technical guideline of the system are achieved,some disadvantages using DSP and FPGA such as complexity and long periods are overcome.