Zerotree entropy based coding of stereo video sequences | |
| Author | Suthinee Thanapirom |
| Call Number | AIT Thesis no.TC-02-16 |
| Subject(s) | Coding theory Video compression Wavelets (Mathematics) |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. TC-02-16 |
| Abstract | Over the past decade, the growing interests in realistic visual communication systems have lead to the rapid development of 3D visual compression techniques. A stereoscopic system is a simple and efficient way to stimulate 3D perception. Typically there are more than two views to be sent or transmitted however this thesis study considers only 2 view system. This system results in a twofold increase in bandwidth over the existing monoscopic channel bandwidth. Achieving a significant reduction in the excess bandwidth is needed for transmitting stereo video over the limited channel bandwidth. A number of approaches to compress stereo sequences were proposed and evaluated under various criteria. This thesis presents a new technique for coding stereo video sequences based on Discrete Wavelet Transform (DWT). The proposed technique exploits Zerotree Entropy Coding (ZTE) that makes use of the wavelet block concept to achieve low bit rate stereo video coding. In order to be compatible with monoscopic transmission, the encoder codes one stream, namely the main stream, at a higher quality and codes another stream, called auxiliary stream, with respect to the main stream using disparity information. Main stream is independently coded by a modified Zerotree video coder and the auxiliary stream is predicted based on disparity compensation. The residual image of auxiliary stream is then coded by a modified Zerotree video coder. The performance of the proposed encoder is presented and compared with the performance of the modified international stereo video coding standards, MPEG-2, so as to be a fair comparison. The simulation results over two tests stereo image sequences show significant improvement in both objective and subjective quality compared to the modified MPEG-2 stereoscopic codec. The proposed encoder outperforms the modified MPEG-2 codec about 2-3 dB in chrominance components of both main and auxiliary stream. Whereas the luminance component enhances the coding gain of 1 dB at the low bit rate in the main stream and of 1.5- 2 dB in the auxiliary stream. |
| Year | 2002 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. TC-02-16 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Information and Communications Technologies (DICT) |
| Academic Program/FoS | Telecommunications (TC) |
| Chairperson(s) | Fernando, W. A. C. ; |
| Examination Committee(s) | Ahmed, Kazi M. ;Teerapat Sanguankotchakorn; |
| Scholarship Donor(s) | Sonera Corporation, Finland; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2002 |