MPEG-2信噪比可分级图象编码的研究

北京邮电大学学报 ›› 1999, Vol. 22 ›› Issue (4): 50-55.

MPEG-2信噪比可分级图象编码的研究

李莉莎, 尹昊晖, 张家谋

北京邮电大学电信工程学院, 北京 100876

收稿日期:1999-07-05 出版日期:1999-11-10
基金资助:
国家自然科学基金资助项目(69672037)

The Study on SNR-based Hierarchical Coding of Image in MPEG-2

Li Lisha, Yin Haohui, Zhang Jiamou

School of Telecommunication Engineering, Beijing University ofPosts and Telecommunications, Beijing 100876

Received:1999-07-05 Online:1999-11-10

摘要/Abstract

摘要： 考虑到与标准的兼容及实用推广的前景, 介绍了基于MPEG-2国际标准的可分级编码方法的研究.并从MPEG-2可分级方法的四种方案中选择了信噪比可分级方法作为主要的仿真方法.信噪比分级方法是一个视频源产生两个具有相同空间、时间分辨率和不同视频质量的视频层, 低层自己编码来提供基本视频质量, 增强层则被编码来增强低层.实验结果证明, 该方法的增强层对基层的图象质量确实有相当的增强作用.

关键词: 可分级编码, MPEG-2, 增强层

Abstract: In view of the compatibility with the standard and the prospect for application's extending, this paper introduced ways of hierarchical coding based on the International standard MPEG-2. We selected the SNR based hierarchical way as the main emulation mode from the four hierarchical ways which are mentioned by MPEG-2. The SNR based hierarchical way produces two videolayers from one source video. These two layers have different image quality butthe same resolving power in space and time. When decoding , the low layer will be decoded by itself to provide a video with basal quality while the enhanced layer will be used to improve the quality of the video that produced by the low layer. Through experiment, the enhanced effect on the quality of the base layer video is showed to be evident and promising.

Key words: hierarchical coding, MPEG-2, enhanced layer

中图分类号:

TN94

李莉莎, 尹昊晖, 张家谋. MPEG-2信噪比可分级图象编码的研究[J]. 北京邮电大学学报, 1999, 22(4): 50-55.

Li Lisha, Yin Haohui, Zhang Jiamou. The Study on SNR-based Hierarchical Coding of Image in MPEG-2[J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 1999, 22(4): 50-55.