Research On Packet Loss Compensation Technology Over Video Transmission

In recent years, with the development on the Internet and mobile communication networks, multimedia communication technology has increasingly extensive usage. However, the packet loss or bit error caused by unsteady channel environment can heavily undermine the video decoding performance. Therefore, the packet loss compensation technology, which can improve the robustness of video stream, becomes an important research direction in video coding technology. Based on the study of H.264/AVC standard and its packet loss compensation, we propose two improved algorithms.In this thesis, by combining the image inpainting algorithms in computer graphics and computer vision and the spatial error concealment algorithms in H.264/AVC standard, we first propose an improved spatial error concealment algorithm based on exemplar and fast marching image inpainting. After the simulation and test, compared with the spatial error concealment, our proposed algorithm has a0.93dB improvement in objective performance in average and also has a better performance in subjective quality.Then, by combining the motion inpainting algorithms in video inpainting and the temporal error concealment algorithms in H.264/AVC standard, we propose an improved temporal error concealment algorithm based on inter mode and motion inpainting. After the simulation and test, compared with the temporal error concealment, our proposed algorithm has a0.58dB improvement in objective performance in average and also has a better performance in subjective quality.