Research on an adaptive frame rate control technique and its applications for high-frame-rate motion images

这项为期两年的研究旨在开发一种新的压缩编码技术，用于高帧率运动图像，在有限的传输比特率内最大限度地提高图像质量。具体的目的包括（1）开发用于高帧速率运动图像的自适应和局部帧速率控制技术，（2）导出用于由（1）生成的图像序列的时间图像质量的预测技术，以及（3）开发基于结果（1）和（2）最大化时空总图像质量的编码算法。我们已经研究了问题（1）和（2），并提出了一种自适应帧率控制技术，该技术可以适应非平稳运动，同时抑制运动锯齿。基于2005年获得的技术，我们在2006年尝试开发一种新的MPEG-4编码器，其以通过最大化估计的总图像质量（MOS）而导出的“最优帧速率”对目标图像序列进行编码。通过与固定帧率下的图像序列进行比较，验证了本文方法的有效性，并认为本文的最终目标已经完全实现。

This two-year research aims at a development of a novel compression coding technique for high-frame-rate motion images which maximizes the image quality within a restricted transmission bit rate. The detailed objects include (1) a development of an adaptive and local frame rate control technique for high-frame-rate motion images, (2) a derivation of a prediction technique for the temporal image quality for image sequences generated by (1), and (3) a development of a coding algorithm which maximizes the spatio-temporal total image quality based on the results (1) and (2).In 2005, we have investigated the issues (1) and (2), and proposed an adaptive frame-rate control technique which can adapt to non-stationary motion while suppress motion jaggyness.Based on the technique obtained in 2005, we have tried to develop a novel MPEG-4 encoder in 2006, which encodes a target image sequence with the "optimal frame rate" derived by maximizing the estimated total image quality (MOS). The resulting image sequences were compared to fixed-frame-rate ones to confirm the effectiveness of our approach.From these results, we believe that our final goals have been completely achieved.