OV7670和ADV611的图像采集与压缩系统设计

Design of Image Acquisition and Compression System Based on OV7670 and ADV611

根据磁悬浮试验线通信基站诊断功能的需要,设计了一种基于OV7670和ADV611的图像信息采集与压缩传输系统。使用Verilog语言实现了基于SCCB总线协议的OV7670图像传感器控制接口,通过配置OV7670内部寄存器使其输出符合CCIR-601格式的数字图像数据流。图像压缩部分采用基于小波变换的ADV611图像压缩编码芯片,在控制ADV611的量化带宽的计算中,采用了基于PID控制的量化带宽的算法,得到恒定的码率。

According to the functional diagnosis need of maglev test line communication base station,the system of image acquisition and compression based on OV7670 and ADV6 1 1 is designed.The control interface of OV7670 image sensor based on SCCB bus protocol is completed using Verilog language.By configuring the OV7670 internal registers,the output data stream of image meets the international standard CCIR-601 .The image compression uses the chip of ADV6 1 1 which based on wavelet transform.In order to achieve a near con-stant compressed bit rate,the improved PID control algorithm is used during the process of calculating bin widths.