MULTIPLE DESCRIPTION VIDEO CODING USING MOTION-COMPENSATED LIFTED 3D WAVELET DECOMPOSITION

In this paper 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 like 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 sub-sampling 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. 1

3D Wavelet Transformation for Visual Data Coding With Spatio and Temporal Scalability as Quality Artifacts: Current State Of The Art

Several techniques based on the three–dimensional (3-D) discrete cosine transform (DCT) have been proposed for visual data coding. These techniques fail to provide coding coupled with quality and resolution scalability, which is a significant drawback for contextual domains, such decease diagnosis, satellite image analysis. This paper gives an overview of several state-of-the-art 3-D wavelet coders that do meet these requirements and mainly investigates various types of compression techniques those exists, and putting it all together for a conclusion on further research scope