A Proposal of Indexing Conference Movies with Thinking States

In this paper, we propose indexing conference movies with thinking states. Currently, one of reasons why conference movies do not represent participants´ thinking states is that existing ways do not place emphasis on receding participants´ concentration and interest. To address this issue, we define MS-Level (Mental State Level) derived from one´s beta wave (a part of brainwave) as an indicator of depth of thinking, and index conference movies with MS-Index (Mental State Index). 3 experiments have been conducted to evaluate our proposition using a prototype system consisting of a movie player with MS-Indices. We conclude that our proposal will contribute to a better understanding of participants´ thinking states during conferences, and users can find scenes in which participants think well or not.