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
Key words
hybrid digital-analog transmission/image wireless transmission/SoftCast/DCT/unequal power allocation
维普
万方数据