| 时空域相结合的视频差错掩盖方法 |
| |
| 引用本文： | 骆华燕,朱秀昌. 时空域相结合的视频差错掩盖方法[J]. 中国图象图形学报, 2011, 16(1): 27-31 |
| |
| 作者姓名： | 骆华燕 朱秀昌 |
| |
| 作者单位： | 南京邮电大学江苏省图像处理与图像通信重点实验室,南京邮电大学江苏省图像处理与图像通信重点实验室 |
| |
| 基金项目： | 国家自然科学基金项目（60672134） |
| |
| 摘 要： | 为了克服视频解码端时域差错掩盖技术不能准确估计丢失块运动矢量的缺点，提出了一种将解码端运动估计和隐藏运动模型相结合的误码差错掩盖方法。首先，利用丢失块周围正确接收像素估计丢失块运动矢量，并计算估计的准确性。然后根据准确性，通过隐藏运动模型充分利用丢失块的空域和时域相关性进行差错块的掩盖。仿真结果表明，与现有的算法相比，该方法能有效提高重建视频图像质量平均近1dB。
|
| 关 键 词： | 视频编码； 差错掩盖； 运动估计； 虚拟相机； 隐藏运动模型 |
| 收稿时间： | 2009-06-03 |
| 修稿时间： | 2010-08-31 |
A temporal and spatial combined error concealment scheme for video communication |
| |
| Luo Huayan and Zhu Xiuchang. A temporal and spatial combined error concealment scheme for video communication[J]. Journal of Image and Graphics, 2011, 16(1): 27-31 |
| |
| Authors: | Luo Huayan and Zhu Xiuchang |
| |
| Affiliation: | Luo Huayan,Zhu Xiuchang(Jiangsu Province Key Laboratory on Image Processing & Image Communication,Nanjing University of Posts and Telecommunications,Nanjing 210003 China) |
| |
| Abstract: | To overcome the shortcomings of temporal error concealment techniques in decoder that can not estimate motion vector of the loss block accurately, motion estimation in decoder and implicit motion model combined error concealment scheme is presented. First of all, we utilize the survived surrounding pixels of lost block for motion estimation, and determining the accuracy of estimates. Then we restore the missing pixels with implicit motion model making full use of the relevance of temporal and spatial domain according to the accuracy. The simulation results show that this method can improve the video image quality by 1dB than other methods. |
| |
| Keywords: | video encoding error concealment motion estimation virtual camera implicit motion model |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《中国图象图形学报》浏览原始摘要信息 |
|
点击此处可从《中国图象图形学报》下载免费的PDF全文 |
