Seran Vidhya, Kondi Lisimachos P
Department of Electrical Engineering, The State University of New York at Buffalo, Buffalo, NY 14260, USA.
IEEE Trans Image Process. 2007 Dec;16(12):2927-35. doi: 10.1109/tip.2007.909316.
Scalability is an important desirable property of video codecs. Wavelet-based motion-compensated temporal filtering provides the most powerful scheme for scalable video coding and provides high-compression efficiency that competes with the current state of art codecs. However, the delay introduced by the temporal filtering schemes is sometimes very high, which makes them unsuitable for many real-time applications. In this paper, ue propose a new temporal filter set to minimize delay in 3-D wavelet-based video coding. The new filter set gives a performance at par with existing longer filters. The length of the filter can vary from two to any number of frames depending on delay requirements. If the frames are processed as separate groups of frames (GOFs), the proposed filter set will not have any boundary effects at the GOF. Experimental results are presented and conclusions are drawn.
可扩展性是视频编解码器的一项重要理想特性。基于小波的运动补偿时域滤波为可扩展视频编码提供了最强大的方案，并提供了与当前最先进编解码器相媲美的高压缩效率。然而，时域滤波方案引入的延迟有时非常高，这使得它们不适用于许多实时应用。在本文中，我们提出了一种新的滤波器组，以最小化基于三维小波的视频编码中的延迟。新的滤波器组具有与现有更长滤波器相当的性能。滤波器的长度可以根据延迟要求从两帧变化到任意数量的帧。如果将帧作为单独的帧组（GOF）进行处理，所提出的滤波器组在GOF处不会有任何边界效应。给出了实验结果并得出了结论。
