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Article type: Cover
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Published: December 13, 2002
Released on J-STAGE: September 20, 2017
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Article type: Index
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Published: December 13, 2002
Released on J-STAGE: September 20, 2017
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Shinji ABE, Shinji MIYAHARA, Yasuhito HAYASHI, Yoshinobu TONOMURA
Article type: Article
Session ID: ME2002-84
Published: December 13, 2002
Released on J-STAGE: September 20, 2017
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AssociaGuide is an associative content-navigation browser that uses a map-like browsing space and video surfing functions. A typical application example is browsing and retrieval of large number of streaming video contents in network. This paper reports about that result of a public trial service actual proof experiment enforced in the period of this March - July to evaluate the usability of this system and a service.
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Akihito ACTS, Suguru HIGASHINO, Yoshinobu TONOMURA
Article type: Article
Session ID: ME2002-85
Published: December 13, 2002
Released on J-STAGE: September 20, 2017
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We propose the concept of the Hyper Interactive, and a typical prototype system in this paper. We construct the Interactive Cinema system that is realized the Hyper Interactive. This paper reports the results of a public trial service actual proof experiment enforced in the period of this March - July to evaluate the effectiveness of this system and a service.
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Suteecharuwat PRAMUAL, Masayuki NAKAJIMA
Article type: Article
Session ID: ME2002-86
Published: December 13, 2002
Released on J-STAGE: September 20, 2017
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The Mobile Virtual Environment (MVE) is our newly proposed movable Virtual Environment (VE) that is devised to provide a small size, and affordable immersive VE. It is designed to be a vehicle for enhancing the virtual navigation. The user can use the MVE to virtually perceive the physical view of the designed virtual environments. The conceptual design of MVE is inspired by an idea to equip a conventional CAVE system with a driving mechanism that has at least 3 degree of freedoms, for moving in forward-backward, left-right, and rotation direction. Our first MVE prototype was developed on The Vuton II, an omni-directional vehicle designed by Hirose & Yoneda Robotics Laboratory at Tokyo Institute of Technology. The displaying system was implemented on one soft screen and non-stereoscopic projection system. The graphics system was developed with Java2 and its Java3D API on the PC platform. This paper introduces the hardware and software architecture of our first MVE prototype. The detail of hardware and software construction, as well as its problems and limitations found during the development will also be discussed.
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Katsuyuki MATSUI, Takashi Tachibana, Masaaki FUJIYOSHI, Hitoshi KIYA
Article type: Article
Session ID: ME2002-87
Published: December 13, 2002
Released on J-STAGE: September 20, 2017
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A watermarking scheme allowing the desired image quality that embeds binary sequences into an image is proposed in this paper. The proposed scheme improves relisience with comparison to those of conventional watermarking schemes allowing the desired image quality by dedication to embedding binary sequences, simultaneously generates a watermarked image with the desired quality for any images. Simulation results show that the proposed scheme assures the quality of a watermarked image and extracts embedded binary sequences from a watermarked image. It is also shown that resillience of the proposed scheme improves with comparison to that of a conventional scheme.
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Takuji WARASHINA, Yasuhiro INAZUMI, Toshiyuki YOSHIDA
Article type: Article
Session ID: ME2002-88
Published: December 13, 2002
Released on J-STAGE: September 20, 2017
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In encoding a video signal with a prescribed bitrate, a suitable assignment of the average bits per frame and framerate can improve the subjective quality of the target video. The authors have proposed a technique for estimating such an "optimal framerate" using some feature values of videos. This paper applies the technique to a video transcoder, and proposes an algorithm which yields MPEG bitstreams with a variable framerate. Subjective assessment tests for videos obtained by the proposed algorithm confirm that our technique gives higher quality compared with fixed framerate cases.
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Hiroshi FUJISAWA, Katsunori AOKI, Makoto YAMAMOTO, Yuichi IWADATE, Yos ...
Article type: Article
Session ID: ME2002-89
Published: December 13, 2002
Released on J-STAGE: September 20, 2017
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We examine new broadcast systems and services for stream contents using multicast on IEEE802.11 Wireless LAN. Using multicast on Wireless LAN is an advantage in utilization efficiency of bandwidth. But IEEE802.11 MAC protocol doesn't have a packet loss recovery mechanism for multicast packets. Therefore, to construct new application using multicast, some recovery mechanism should be provided at higher laye. To design the recovery mechanism for multicast packet loss, this paper shows the largest throughput and the packet loss ratio while being some unicast traffic as a multicast transmission performance.
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Kazuhiro UEMURA, Shoichiro OGAWA, Takashi KATO, Toshihiro UEHARA, Haru ...
Article type: Article
Session ID: ME2002-90
Published: December 13, 2002
Released on J-STAGE: September 20, 2017
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We have studied a storage networking system and its aDolications to shared storage for video editing. In this report, we measured the characteristics of a remote storage shared by SCSIoverIP protocol through a long distance network between Tokyo and Okayama. It turned out that SCSIoverIP demonstrated very higher transfer rate than NFS on the network. And also, we first confirmed the HDTV video could be transferred and played back continuously through a long distance network with SCSIoverIP.
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Article type: Appendix
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Published: December 13, 2002
Released on J-STAGE: September 20, 2017
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Article type: Appendix
Pages
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Published: December 13, 2002
Released on J-STAGE: September 20, 2017
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