Multiple description video coding using motion-compensated lifted 3D wavelet decomposition
We design a multiple description (MD) video coding scheme based on the motion compensated (MC) lifted wavelet transform. A major advantage of basing MD video coding on motion-compensated lifted 3D wavelet decomposition is that it does not require any mismatch control as in a hybrid codec which was previously achieved by sending drift compensation data. We propose to perform the temporal decomposition of a group of pictures and then create multiple descriptions for each temporally transformed frame. We use polyphase subsampling with an appropriate amount of oversampling to form the descriptions and to control the redundancy among them. We determine the appropriate amount of redundancy as a function of description loss probability. Our experimental results show that the controlled introduction of redundancy leads to significant improvements in lossy transmission environments.