A Hybrid Error Concealment Technique for H.264/AVC Using Boundary Distortion Estimation
| Autor: | Chih-Cheng Wang, 王志晟 |
|---|---|
| Rok vydání: | 2010 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 98 Packet loss is prone to occurrence in the transmission channel due to error-prone network environments. It usually causes serious distortion, especially in highly compressed video coding standard. The distortion not only damages to single frame but also propagates to successive frames. To improve the distortion, error concealment techniques are adopted to restore lost video data in the decoder. In this thesis, a hybrid error concealment technique for H.264/AVC based on boundary distortion estimation has been proposed. It could efficiently restore the corrupted data by appropriately switching temporal error concealment approach to spatial error concealment approach. Both of the proposed temporal and spatial error concealment approaches adopt the boundary distortion estimation procedure to be the evaluation criterion. The recovery result with minimal boundary distortion will be selected to restore the corrupted data by the proposed adaptive weight-based switching algorithm. Therefore, the proposed hybrid error concealment technique effectively improves the recovery performance and outperforms other methods, especially packet loss in scene-change frames or high motion regions. Experimental results show the proposed hybrid error concealment technique could effectively enhance the recovery performance. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
| Externí odkaz: |
|