一种新的空间域图像错误掩盖方法

提出了空间域图像错误掩盖方法.在信道丢包率较高时，采用场编码交织技术将图像按像素行分为两个场，并分别独立编码和传输.当某个场中的图像数据在网络传输过程中丢失时，用相邻场的像素值通过插值的方法恢复丢失数据.实验结果表明，掩盖效果明显优于现有的空间域错误掩盖方法，即使在图像数据丢失一半的情况下，恢复图像主观上仍可接受，测试图像的PSNR增益可达2.77~7.24 dB.

A Novel Spatial Image Error Concealment Method

By using the field coding techniques,the image was divided by pixel lines into two fields, which are independently encoded and transmitted. When the image data in one field was lost during transmission, the pixels in its neighbour field were used to interpolate the lost one. Experiment results show that the proposed method has much better concealment results than those error conceal method generally used. The reconstructed image is subjectively acceptable and the PSNR gain is as much as 2.77 dB to 7.24 dB even if half of frame is lost.