自适应聚类的图像块分级DCT混合数模无线传输方法  

Adaptive-clustered image-block hierarchical DCT hybrid digital-analog wireless transmission method

作　　者：唐述 杨鹏 谢显中[1] 周广义 李佳庆 赵瑜 TANG Shu;YANG Peng;XIE Xianzhong;ZHOU Guangyi;LI Jiaqing;ZHAO Yu(College of Computer Science and Technology,Chongqing University of Posts and Telecommunications,Chongqing 400065,China)

机构地区：[1]重庆邮电大学计算机科学与技术学院,重庆400065

出　　处：《通信学报》2024年第1期152-166,共15页Journal on Communications

基　　金：国家自然科学基金资助项目(No.61601070);重庆市自然科学基金资助项目(No.CSTB2023NSCQ-MSX0680);重庆市教育委员会科学技术研究重大项目基金资助项目(No.KJZD-M202300101)。

摘　　要：提出了一种新颖的混合数模无线传输方法来实现高质量的图像传输。首先,从原始图像中减去先下采样后上采样的图像来得到残差层图像。其次,提出了一种自适应聚类的块分级离散余弦变换算法来有效去除残差层图像像素之间的相关性。最后,提出了一种基于图像块等级的不等功率分配策略来进一步提升接收端的图像质量。大量的实验结果表明,所提方法在定性评估和定量度量两方面都明显优于现有较成功的混合数模图像无线传输方法。In order to achieve high quality image transmission,a novel hybrid digital-analog(HDA)wireless transmission method was proposed.Firstly,the image residual layer was constructed by subtracting the downsampled and upsampled images from the original image respectively.Secondly,an adaptive-clustered block-level discrete cosine transform(DCT)algorithm was proposed to efficiently remove the correlation between image pixels in the residual layer.Finally,an image block level-based unequal power allocation strategy for further boosting the quality of received images was proposed.Extensive experiments results demonstrate that the proposed method is significantly superior to existing successful hybrid digital analog image wireless transmission methods in both qualitative evaluation and quantitative measurement.

关 键 词：混合数模传输 图像无线传输 伪模拟传输方法 离散余弦变换 不等功率分配 

分 类 号：TN919.8[电子电信—通信与信息系统]