Use this URL to cite or link to this record in EThOS: http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.486106
Title: Stereoscopic video coding for mobile applications
Author: Adikari, Buddika R. B.
ISNI:       0000 0001 3398 397X
Awarding Body: University of Surrey
Current Institution: University of Surrey
Date of Award: 2007
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Abstract:
After considering the growing demand for realistic video reproduction, in this thesis, we have proposed two stereoscopic video coding schemes that are evaluated for the suitability for 3D mobile applications. One is an H.264 based stereoscopic video codec and the other is a Distributed Video Coding (DVC) based stereoscopic codec. During the first half of the thesis, we propose an H.264 based stereoscopic codec that includes a modification to handle two video streams in order to exploit disparity and worldline correlations as well as a design of a novel motion/disparity vector prediction algorithm that operates more intelligently using the previously coded motion and disparity vector information of the surrounding macroblocks. Simulation results show th~t the proposed H.264 based stereoscopic video codec performs better than MPEG-2 based and ZTE based stereoscopic codecs. The results have also been compared with simulcast H.264 and later proposed MVC (Multiview Video Coding) standard. The former comparison demonstrates a PSNR gain of up to about 2dB, whereas the latter demonstrates comparable results. In the second half of the thesis, we have designed several algorithms to improve the coding efficiency of Wyner-Ziv frames and a novel algorithm for key frame coding in DVC. These algorithms include a spatial and temporal correlation exploitation algorithm for side information generation, a multiple side information handling algorithm and a bitplane by bitplane refinement technique in addition to the mentioned DVC based key frame coding scheme. In the proposed algorithms, we exploit the decoded information very efficiently by taking the advantage of decoded information together with the information available in the decoder. Simulation results clearly show that these algorithms outperform the existing DVC codecs by significant margins. With these algorithms as the backbone, we have then introduced a novel Stereoscopic Distributed Video Coding (SDVC) scheme. Simulation results of the proposed SDVC algorithm demonstrate that it performs better than MPEG-2 based and ZTE based benchmark stereoscopic codecs by up to 3dB and 2dB respectively in terms of objective quality gains. Enally this thesis, presents a W-CDMA channel simulation for both proposed stereoscopic codecs and the results suggest that, SDVC is a viable solution for stereoscopic video coding in mobile applications that comprises robust characteristics against channel noise together with the added advantage oflow encoding complexity.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID: uk.bl.ethos.486106  DOI: Not available
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