传感技术学报2021，Vol.34Issue(3)：319-329,11.DOI:10.3969/j.issn.1004-1699.2021.03.006
一种使用帧间差值的图像传感器片上视频压缩算法
An On-Chip Video Compression Algorithm for Image Sensor Using Differences Between Frames
摘要
Abstract
In order to reduce the output of video data from image sensor,a lossless video compression algorithm by transmitting the encoded differences between two consecutive frames is presented. The design is based on differential pulse code modulation( DPCM) . The differential operations are performed in the analog domain to decrease the area complexity of the circuit. The proposed compression algorithm encodes the picture differences with the block-based lossless compression( BLC) coding scheme. Experimental results demonstrate that the video is restored without loss by decompressing the encoded data. By testing seven representative sample videos of 1280× 720@ 60 fps with 8-bit depth,the best block size of 4 × 4 and the best threshold 63 of mode switching are obtained. The compression gain reached 78.5％ in almost dark scenes. A compression gain of 43.5％ is achieved in scene with complex content changes. The proposed algorithm is more suitable for the compression of long-time static scenes.关键词
视频压缩/CMOS图像传感器/基于块无损压缩/差分脉冲编码调制/压缩率Key words
video compression/CMOS image sensor/block-based lossless compression ( BLC )/differential pulse code modulation( DPCM)/compression ratio分类
信息技术与安全科学引用本文复制引用
蒋永唐,徐江涛,陈全民,衡佳伟..一种使用帧间差值的图像传感器片上视频压缩算法[J].传感技术学报,2021,34(3):319-329,11.基金项目
国家重点研发计划项目(2019YFB2204202)This work was supported by the National Key R&D Program of China(2019YFB2204202). （2019YFB2204202）
