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

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.