遠隔買い物支援における複数視点と音声の位置

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  • Multiple Viewpoints and Sound Resources in Assisted Shopping under a Mobile Environment

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Abstract

遠隔作業支援システムにおいては周囲の人々の身体行為を把握することができる文脈提供視点の有効性が指摘されてきた．しかし，空間の移動をともなう遠隔作業支援においては，頻繁な身体や作業空間の移動がともなうこと，作業場面にいる人々やモノによる遮蔽があることによって，適切な文脈提供視点を自然に（作業者に余計な負担を与えずに）提供することは困難である．本論文では，大学にある購買部での実験により，全天球カメラとスマートフォンを用いて，どのようなシステムが，移動をともなう遠隔作業システムにおいて適切な文脈提供視点を自然に与えられるかをエスノメソドロジーの手法で検証した．検証の過程で，音声の位置が，人間の行動形成に大きく関わっていると考えられたので，その知見を取り入れた実験を行った．この結果から，移動をともなう遠隔作業支援においても，文脈提供視点を適切に与えることの有効性と，音声の位置が人間の行動形成に関わることが示された．

It has been suggested in the previous studies that for activities supported by a mobile controlling system, the establishment of contextual viewpoints to project human participants' bodily behaviors in the present context is highly effective. However, when the mobile control involves spatial mobility in addition to simple assistance of the human participants, such an establishment of viewpoints become extremely complex and difficult due to high frequent changes of bodily movements and changes of spatial dynamics. This paper reports an experiment done at a co-op shop in a university, in which the subjects used an omni-directional camera and a mobile phone to remotely assist the shopping. We have investigated by applying ethnomethodological analysis what kind of system would provide a naturally emerging contextual viewpoints most suited for the activity. In the investigation process, we discovered that positioning of the sound sources seems to influence human participants' next actions. We then applied the findings into our experiment. We found out that establishment of contextual viewpoints plays a critical function in a highly mobile situation, and that the positioning of sound sources also determines next action.

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