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Low Bit-rate Color Video Compression using Multiwavelets in Three Dimensions

Chien, Jong-Chih (2005) Low Bit-rate Color Video Compression using Multiwavelets in Three Dimensions. Doctoral Dissertation, University of Pittsburgh. (Unpublished)

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In recent years, wavelet-based video compressions have become a major focus of research because of the advantages that it provides. More recently, a growing thrust of studies explored the use of multiple scaling functions and multiple wavelets with desirable properties in various fields, from image de-noising to compression. In term of data compression, multiple scaling functions and wavelets offer a greater flexibility in coefficient quantization at high compression ratio than a comparable single wavelet. The purpose of this research is to investigate the possible improvement of scalable wavelet-based color video compression at low bit-rates by using three-dimensional multiwavelets. The first part of this work included the development of the spatio-temporal decomposition process for multiwavelets and the implementation of an efficient 3-D SPIHT encoder/decoder as a common platform for performance evaluation of two well-known multiwavelet systems against a comparable single wavelet in low bitrate color video compression. The second part involved the development of a motion-compensated 3-D compression codec and a modified SPIHT algorithm designed specifically for this codec by incorporating an advantage in the design of 2D SPIHT into the 3D SPIHT coder. In an experiment that compared their performances, the 3D motion-compensated codec with unmodified 3D SPIHT had gains of 0.3dB to 4.88dB over regular 2D wavelet-based motion-compensated codec using 2D SPIHT in the coding of 19 endoscopy sequences at 1/40 compression ratio. The effectiveness of the modified SPIHT algorithm was verified by the results of a second experiment in which it was used to re-encode 4 of the 19 sequences with lowest performance gains and improved them by 0.5dB to 1.0dB. The last part of the investigation examined the effect of multiwavelet packet on 3-D video compression as well as the effects of coding multiwavelet packets based on the frequency order and energy content of individual subbands.


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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Chien, Jong-Chihchien7@pitt.eduCHIEN7
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairLi, Ching-Chungccl@engr.pitt.eduCCL
Committee MemberLee,
Committee MemberBoston, John Rboston@engr.pitt.eduBBN
Committee MemberChaparro, Luis Fchaparro@engr.pitt.eduLFCH
Committee MemberChang, Shi-Kuochang@cs.pitt.eduSCHANG
Date: 21 June 2005
Date Type: Completion
Defense Date: 6 April 2005
Approval Date: 21 June 2005
Submission Date: 24 March 2005
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Institution: University of Pittsburgh
Schools and Programs: Swanson School of Engineering > Electrical Engineering
Degree: PhD - Doctor of Philosophy
Thesis Type: Doctoral Dissertation
Refereed: Yes
Uncontrolled Keywords: 3-D; multiwavelet; video compression; wavelet
Other ID:, etd-03242005-092314
Date Deposited: 10 Nov 2011 19:32
Last Modified: 15 Nov 2016 13:37


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