Studies on Universal Multimedia Access

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In order to provide a multimedia information according to users' (mental and physical) abilities, computer facilities, network and CPU loads, we have constructed and evaluated some sightseeing contents supporting 3 switching functions (user interface switching, media switching, QoS control). From some functional and performance evaluations, we have concluded that (1) Understandable media and easy operations are different from computer skill and computer facilities, respectively, (2) the media switching function has different efficts by a combination of media, (3) the QoS control function has some limitations for a reduction of video quality.