efficient scalable video compression by scalable motion coding review and implementation of dwt...
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Efficient Scalable Video Compression by Scalable Motion Coding
Review and Implementation of DWT Based Approach
Syed Jawwad Bukhari
2004-03-0028
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