一种高压缩比的箭载图像采集压缩装置的设计  

Design of an Arrowbor Image Acquisition and Compression Device with High Compression Ratio

作　　者：史强 任勇峰[1] 陈建军[1] 杨振泽 张昊宇 SHI Qiang;REN Yongfeng;CHEN Jianjun;YANG Zhenze;ZHANG Haoyu(Key Laboratory of Electronic Testing Technology,North University of China,Taiyuan 030051)

机构地区：[1]中北大学电子测试技术重点实验室,太原030051

出　　处：《舰船电子工程》2024年第9期165-170,共6页Ship Electronic Engineering

基　　金：国家自然科学基金项目(编号:62305314,62005251);山西省优秀青年基金培育项目(编号:202103021222012)资助。

摘　　要：为实现某箭载设备输出的模拟图像信号的采集处理,设计了一种基于Hi3516A为核心的箭载图像采集压缩装置。该装置采用了CCD图像传感器ICX811AKA作为成像器件,代替了箭载设备的模拟图像信号输出。通过GM7150解码芯片对采集到的模拟图像信号进行高效的数字化处理,转换成BT.656数字信号,从而实现对图像的准确采集与处理。利用集成了H.265压缩硬核的Hi3516A对图像数据进行有效压缩,压缩后的图像数据通过RS-422接口传到上位机。经试验分析验证,该装置成功实现了模拟图像信号向BT.656数字信号的转换,且压缩码率低至680 kbit/s,压缩比高达178∶1,视频图像PSNR值也达36.59 dB,能够满足高压缩率、低失真度等特点,有效保证图像传输的实时性,工作稳定可靠,为军事试验中的图像采集与处理提供了高效可靠的解决方案。In order to realize the acquisition and processing of the analog image signal output by an arrow device,a kind of image acquisition and compression device based on Hi3516A is designed.The CCD image sensor ICX811AKA is used as the imaging device to replace the analog image signal output of the arrow borne device.Through the GM7150 decoding chip,the acquired analog image signal is processed efficiently and converted into BT.656 digital signal,so as to realize the accurate acquisition and processing of the image.Hi3516A integrated with H.265 compression core is used to compress the image data effectively,and the compressed image data is transmitted to the host computer through the RS-422 interface.The experimental analysis verifies that the device successfully realizes the conversion of analog image signal to BT.656 digital signal,and the compression rate is as low as 680 kbit/s,and the compression ratio is as high as 178∶1,the video image PSNR value is also up to 36.59 dB,which can meet the characteristics of high compression rate and low distortion degree,effectively ensure the real-time image transmission,stable and reliable work,and provide an efficient and reliable solution for image acquisition and processing in military tests.

关 键 词：Hi3516A 图像采集 GM7150 图像压缩 H.265 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置] TN7[自动化与计算机技术—控制科学与工程]