Rate-Distortion Optimized Bitstream Extractor for Motion

Scalability in Wavelet-Based Scalable Video Coding

Motion scalability is designed to improve the coding efficiency of a scalable video coding

framework, especially in the medium to low range of decoding bit rates and spatial resolutions.

In order to fully benefit from the superiority of motion scalability, a rate-distortion optimized

bitstream extractor, which determines the optimal motion quality layer for any specific decoding

scenario, is required. In this paper, the determination process first starts o ff with a brute force

searching algorithm. Although guaranteed by the optimal performance within the search domain,

it suffers from high computational complexities. Two properties, i.e., the monotonically

nondecreasing property and the unimodal property, are then derived to accurately describe the

rate-distortion behavior of motion scalability. Based on these two properties, modified searching

algorithms are proposed to reduce the complexity (up to five times faster) and to achieve the

global optimality, even for those decoding scenarios outside the search domain.

Existing System

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Motion scalability is designed to improve the coding efficiency of a scalable video coding

framework, especially in the medium to low range of decoding bit rates and spatial resolut ions.

In order to fully benefit from the superiority of motion scalability, a rate-distortion optimized

bitstream extractor, which determines the optimal motion quality layer for any specific decoding

scenario, is required.

Proposed System

In this paper, the determination process first starts off with a brute force searching algorithm.

Although guaranteed by the optimal performance within the search domain, it suffers from high

computational complexities. Two properties, i.e., the monotonically nondecreasing property and

the unimodal property, are then derived to accurately describe the rate-distortion behavior of

motion scalability. Based on these two properties, modified searching algorithms are proposed to

reduce the complexity (up to five times faster) and to achieve the global optimality, even for

those decoding scenarios outside the search domain.

System Specification

Hardware Requirements:

• System : Pentium IV 2.4 GHz.

• Hard Disk : 40 GB.

• Floppy Drive : 1.44 Mb.

• Monitor : 14’ Colour Monitor.

• Mouse : Optical Mouse.

• Ram : 512 Mb.

Software Requirements:

• Operating system : Windows 7.

• Coding Language : ASP.Net with C#

• Data Base : SQL Server 2008.