On the Environment of the Virtual Real-Time Media via the Networks

在本研究中，作者研究了1)具有传输延迟的网络环境中视觉和触觉信息的呈现方法，2)虚拟环境中立体范围的调节和收敛的影响，3)实时交互与网络延迟之间的关系，以及4)预测方法对抗延迟导致的退化的交互应用实例。在项目1)中，考虑实时交互环境，使用视觉和触觉显示，开发基于触觉信息的协议，而不是基于视觉信息的协议，因为前者在传输性能上具有优势，并确认了提案的优势。其次，在2)中，通过对任务性能的实验，通过使用两个参数都是可控的HMD，证实了收敛性和适应性之间的一致性对任务性能的贡献。在项目3)中，考察具有滞后的网络上远程用户之间协同工作的任务绩效，评估远程用户的预测执行情况。因此，即使使用最简单的预测模型，也可以确认40%到50%的性能改进。最后在4)中，作者尝试将基于预测的交互方案应用于网络用户的竞争情境，即在线赛车游戏。为了减少交互的不兼容和不舒适，引入了新型的预测模型，各终端协同修改每一帧的预测模型，以减小各终端预测的对面虚拟形象与本地虚拟形象之间的距离差距。未来的工作包括对该预测模型的分析以及在其他情况下的应用。

In this research, the authors study on1) the method of presenting visual and tactile information on the network environment with transmission lag,2) the effect of the accommodation and the convergence for the stereo scope in the virtual environment,3) the relationship between the real-time interaction and the lag on the network, and4) the examples of interactive application of the prediction method against degradation caused by the lag.In the item 1), the real-time interactive environment is considered by using visual and tactile display to develop the protocol based on tactile information prior to visual information since the former has the benefit in terms of transmission performance, and to confirm the advantages of the proposal.Secondly in 2), through the experiment of the task performance, it is confirmed that the consistency between the convergence and the accommodation contributes to the performance, by using the HMD of which those two parameters is controllable.In the item 3), the task performance of collaborative work between the remote users on the network with lag is examined, where the implementation of prediction of the remote user is evaluated. As a result, forty through fifty percent of performance improvement is confirmed even if the simplest prediction model is utilized.Finally in 4), the authors try to apply the prediction based interaction scheme for the competitive context of the network users, namely the online racing game. The new type of prediction model is introduced to reduce the incompatibility and comfortless interaction, where each terminal, in collaboration, modifies the prediction model in every frame to reduce the gap of the distance between the predicted opposite avatar and the local avatar, in each terminal. Future works involve the analysis of this prediction model and the application for other context.