Concealment of Video Transmission Packet Losses Based on Advanced Motion Prediction
Independent thesis Basic level (professional degree)Student thesis
Recent algorithms for video coding achieve a high-quality transmission at moderate bit rates. On the other hand, those coders are very sensitive to transmission errors. Many research projects focus on methods to conceal such errors in the decoded video sequence.
Motion compensated prediction is commonly used in video coding to achieve a high compression ratio. This thesis proposes an algorithm which uses the motion compensated prediction of a given video coder to predict a sequence of several complete frames, based on the last correctly decoded images, during a transmission interruption. The proposed algorithm is evaluated on a video coder which uses a dense motion field for motion compensation.
A drawback of predicting lost fields is the perceived discontinuity when the decoder switches back from the prediction to a normal mode of operation. Various approaches to reduce this discontinuity are investigated.
Place, publisher, year, edition, pages
Institutionen för systemteknik , 2003. , 60 p.
Technology, error concealment, video coding, motion compensated prediction, backward coding, dense motion estimation
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-1771OAI: oai:DiVA.org:liu-1771DiVA: diva2:19097