一种基于中间视点的多视点立体视频FGS可分级方案

基于MPEG-4标准FGS可分级技术，提出一种将FGS可分级、视点可分级相结合的多视点立体视频可分级算法。该算法中，中间视点作为基本层进行编码，各视点均预测自中间视点，并产生各相应视点的FGS增强层。编码器结构中，分为I、P、B帧三种情况进行讨论，并针对这三种情况进行改进。所提方案具有灵活、广泛的可分级性能，能适应多种不同的传输需求。实验结果验证了该方案的多视点可分级性。

Middle-view based FGS scalable scheme for multi-view stereo video

Based on MPEG-4 FGS technology, a new scalable coding algorithm for multi-view stereo video was proposed, combining FGS scalability with views scalability. In the proposed algorithm, the middle-view sequence was coded as a base layer and a FGS enhancement layer, with other view sequences all predicted from the middle-view sequence yielding each view's FGS enhancement layers. In this coding structure, three cases (I, P, B frames) were considered, and the corresponding improvements had been implemented. The new method can provide a flexible scalability performance, and it can match many different kinds of transmission requirements. Experimental results proved the multi-view scalability performance of the proposed scheme.