一种新的低复杂度基于变换域的图像差错掩盖算法

A NOVEL ALGORITHM OF IMAGE ERROR CONCEALMENT ON DCT DOMAIN WITH LOW COMPLEXITY

针对图像视频在分组交换传输中的分组丢失问题 ,提出了一种低复杂度的、基于变换域的图像差错掩盖算法 .在编码器端 ,采用分级编码技术 ,根据其对图像质量影响的大小将数据分成具有不同传输优先级的两组 ;在解码器端 ,根据丢失图像块的性质 ,以及预测方法得到的阈值对其进行有效的差错掩盖 .模拟结果显示 。

To solve the problem that image and video packets are liable to be lost when transmitted in packet switch network, a novel algorithm of image error concealment on DCT domain with low complexity was proposed. By using scalability coding technology, the coded image data were partitioned into two groups with different priorities according to their effects on the image quality in the encoder. When decoding, based on its attributes and the pre-determined threshold, the lost image block was concealed. Simulation results show that by using the proposed algorithm, better image quality and quite lower computing complexity can be obtained.