Enhanced Motion Compensated Temporal Filtering for Interframe Wavelet Video Coding
| Autor: | Chia-Yang Tsai, 蔡家揚 |
|---|---|
| Rok vydání: | 2005 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 93 An enhanced motion compensated temporal filtering (MCTF) coding scheme is incorporated into the interframe wavelet coding architecture in this study. Interframe wavelet video coding can provide SNR, temporal, and spatial scalability simultaneously. Furthermore, it has a comparable coding performance to H.264/AVC at high bit rates. In this thesis, we propose improvements on MCTF and motion information scalability. Motion compensated temporal filtering (MCTF) is an essential component in deciding the coding performance of an interframe wavelet system. We modify the motion estimation syntax/scheme originally specified in the H.264/AVC and fit it into the interframe wavelet structure. In addition, the techniques of I-block, bi-directional motion estimation, and motion cost function adjustment are employed to improve image quality. Furthermore, in the original interframe wavelet video coding, the motion information is non-scalable and it may become the dominate portion of the entire bitstream at low bit rates. We propose a motion information partitioning scheme applied to the AVC interframe prediction. By encoding motion vectors at different accuracy and block-size level, we split motion vectors into multiple layers. Experimental results show very promising performance improvement particularly on the subjective quality. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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