Efficient Scalable Video Compression by Scalable Motion Coding Review and Implementation of DWT Based Approach Syed Jawwad Bukhari

Overview of Presentation Scalable Video Coding Scalable Motion Coding DWT Which Approaches – For Review TWAVIX MC-EZBC – For Implementation Scalable Video coding Using DWT and Scalable Motion Coding – EFFICIENT SCALABLE MOTION CODING FOR WIDE-RANGE SCALABLE VIDEO COMPRESSION

SCALABLE VIDEO CODING Decode part of bit stream Stream is in form of number of layers, – a ‘base’ layer – one or more ‘enhancement’ layers  Quality vs. bit rate

Types of Scalability Spatial SNR Temporal

Spatial Scalability Images adapted from [2]

Temporal Scalability Image adapted from [2]

Spatial and Temporal Correlation Image adapted from [2]

TWAVIX Architecture The WAvelet-based Vldm Coder with Scalability Image adapted from [1]

Motion in adjacent frames

Difference due to motion, Optical flow Difference Optical Flow Image adapted from [2]

Motion Estimation and Compensation Image adapted from [2]

Macro-block motion prediction Image adapted from [2]

Motion Vectors Image adapted from [2]

Motion Compensated Frame Image adapted from [2]

DWT Image adapted from [2]

DWT 1 Stage Image adapted from [2]

DWT 2 Stage Image adapted from [2]

DWT 5 Stage Image adapted from [2]

DWT layering

References 1. ACCURACY-SCALABLE Motion CODING FOR EFFICIENT SCALABLE VIDEO COMPRESSION; by Boisson,Edouard & Guillemot 2. H.264 and MPEG-4 Video Compression; by Iain E. G. Richardson, The Robert Gordon University, Aberdeen, UK