Video Error Concealment
Independent thesis Advanced level (degree of Master (Two Years)), 10 credits / 15 HE creditsStudent thesis
The application of video signals for communication and computer networks (such asdigital video, video conferencing and …) has been increased noticeably in the recentyears to provide high quality multimedia services. In the transmission of packetizedvideo through unreliable communication links, channel noise or congestion often leadsto packet loss. To combat this, signal reconstruction and error concealment have beenproposed to obtain a close approximation to the original video.The main idea of this thesis is to introduce an algorithm for recovering lost macro blocksin the received video frames so that the damaged area can be reconstructed by using thesame frame or the neighbor ones. In this thesis our main goal is quality improvement forthe real time applications.The proposed schemes are spatiotemporal algorithms which are based on BMA andconditional filtering. they adaptively select proper candidate regions to conceal theartifact of a lost block based on the boundary matching principle. At the same time,boundary of lost MBs is analyzed to avoid unexpected discontinuity between replacedblocks and their boundary. The proposed schemes are very simple to implement and arewell suited for real time video decoding applications. Simulations show that theproposed schemes outperform existing methods both on PSNR and visual quality clearlyof about 1～ 3dB.
Place, publisher, year, edition, pages
video Reconstruction, spatiotemporal video error concealment, BMA, segmentation, directional Filtering.
Engineering and Technology
IdentifiersURN: urn:nbn:se:kth:diva-44524OAI: oai:DiVA.org:kth-44524DiVA: diva2:450846
Kasaei, Shohreh, ProfessorHaj Sadeghi, Khosro, Assistant Professor
QC 201112162011-12-162011-10-232013-09-05Bibliographically approved