Introduction and Analysis of the H. 264 Scalable Extension Techniques
H．264可分级扩展技术的介绍和分析

The scalable extension of H. 264 is the newest work of developing joint standards for ISO/IEC and ITU. Now, this project is still in progress, and yet the main frame of the extension standard has been established. In order to make the ongoing standard known to people, in this paper a short introduction about the main frame of the H. 264 extension standard is provided first, with the mechanism of implementing spatial, temporal and quality scalability explained. Then the key techniques involved in inter-layer coding and fine grain quality scalable coding are analyzed in detail. Making use of the newest reference software JSVM5. 7, we carry out some comparisons and tests on performance and complexity, which verify that those techniques keep quite good coding efficiency together with satisfactory scalable performance.