Efficient Scalable Video Compression by Scalable Motion Coding

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