Many applications, such as video conference systems and remotely controlled systems, need to transmit multiple video images through narrow band networks.However, high quality transmission of the video images is not possible within the network bandwidth.This paper describes a technique, User-Centered Video (UCV), which transmits multiple video images through a network by changing quality of the video images based on a user's interest.The UCV assigns a network data rate to each video image in proportion to the user's interest.The UCV transmits video images of interest with high quality, while degrading the remaining video images.The video images are degraded in the space and time domains (e.g., spatial resolution, frame rate) to fit them into the assigned data rates.The UCV evaluates the degree of the user's interest based on the window layouts.The user thereby obtains both the video images of interest, in detail, and the global context of video images, even through a narrow band network.

Article Free Access Share on Courtyard: integrating shared overview on a large screen and per-user detail on individual screens Authors: Masayuki Tani Hitachi Research Laboratory, Hitachi, Ltd., 7-1-1 Omika-cho, Hitachi-shi, Ibaraki-ken, 319-12 Japan Hitachi Research Laboratory, Hitachi, Ltd., 7-1-1 Omika-cho, Hitachi-shi, Ibaraki-ken, 319-12 JapanView Profile , Masato Horita Hitachi Research Laboratory, Hitachi, Ltd., 7-1-1 Omika-cho, Hitachi-shi, Ibaraki-ken, 319-12 Japan Hitachi Research Laboratory, Hitachi, Ltd., 7-1-1 Omika-cho, Hitachi-shi, Ibaraki-ken, 319-12 JapanView Profile , Kimiya Yamaashi Hitachi Research Laboratory, Hitachi, Ltd., 7-1-1 Omika-cho, Hitachi-shi, Ibaraki-ken, 319-12 Japan Hitachi Research Laboratory, Hitachi, Ltd., 7-1-1 Omika-cho, Hitachi-shi, Ibaraki-ken, 319-12 JapanView Profile , Koichiro Tanikoshi Hitachi Research Laboratory, Hitachi, Ltd., 7-1-1 Omika-cho, Hitachi-shi, Ibaraki-ken, 319-12 Japan Hitachi Research Laboratory, Hitachi, Ltd., 7-1-1 Omika-cho, Hitachi-shi, Ibaraki-ken, 319-12 JapanView Profile , Masayasu Futakawa Hitachi Research Laboratory, Hitachi, Ltd., 7-1-1 Omika-cho, Hitachi-shi, Ibaraki-ken, 319-12 Japan Hitachi Research Laboratory, Hitachi, Ltd., 7-1-1 Omika-cho, Hitachi-shi, Ibaraki-ken, 319-12 JapanView Profile Authors Info & Claims CHI '94: Proceedings of the SIGCHI Conference on Human Factors in Computing SystemsApril 1994 Pages 44–50https://doi.org/10.1145/191666.191690Published:24 April 1994Publication History 12citation685DownloadsMetricsTotal Citations12Total Downloads685Last 12 Months31Last 6 weeks2 Get Citation AlertsNew Citation Alert added!This alert has been successfully added and will be sent to:You will be notified whenever a record that you have chosen has been cited.To manage your alert preferences, click on the button below.Manage my AlertsNew Citation Alert!Please log in to your account Save to BinderSave to BinderCreate a New BinderNameCancelCreateExport CitationPublisher SiteeReaderPDF

Graphics and live video are widely employed in remotely-controlled systems like industrial plants. Interaction with live video is, however, more limited compared with graphics as users cannot interact with objects being observed in the former. Object-Oriented Video techniques are described allowing object-oriented interactions, including the use of real-world objects in live video as reference cues, direct manipulation of them, and graphic overlays based on them, which enable users to work in a real spatial context conveyed by the video. Users thereby understand intuitively what they are operating and see the result of their operation.

This paper discusses a new simple methodology for defining software system requirements. We have developed a practical approach which we call FS (Flow Sketch) methodology. This methodology, based on the data flow concept, has been developed to provide the precise means of user's requirements. Actually, the user's requirements are presented in data form by particular format cards. Data are classified and the relationships between data are decided through brainstorming. Then, a requirement definition model is defined. FS methodology employs diagrammatic notation. This notation is suitable for the visual and the interactive description of the dynamic system data flow. As a result, misunderstandings of the software system between the software producer and software user will decrease.