>>BACK ■Internet HDTV Video Studio System [i-Visto] ●What Kind of Technology? Described here is a video transmission system using IP (Internet Protocol) to deliver high-quality video images such as HDTV (High Definition Television, on the way to becoming the main format for digital broadcasting) to remote locations in real time. It consists of the following components. (1) i-Visto Gateway for real-time relay of uncompressed video images (2) i-Visto Media Server for real-time storage and delivery of HDTV and other uncompressed video images (3) i-Visto HDTV Camera capable of capturing HDTV video images and transferring them in uncompressed form (4) i-Visto Switch, an ultra-high-speed LAN switch, i-Visto Manager, a network operations system, and i-Visto Media Converter for real-time conversion of HDTV video images to SDTV video images over the network ●The Substance of Our Work Up to now, dedicated lines and ATM switching have been used for transmitting commercial video content. This system sends video over an ultra-high-speed optical network using 2.4 Gbit/s MAPOS (POS++) and 10 Gbit/s Ethernet. Commercial video containing 1.5 Gbit/s uncompressed HDTV signals can be sent over increasingly speedier IP networks, with delay of 1 frame or less. Other uses made possible include shockless video switching over IP networks, as well as remote video clock synchronization over IP networks. The system is configured of ordinary PCs, operating systems, and IP protocol, making it cheaper to build than conventional systems that use dedicated broadcast equipment, while adapting flexibly to functional additions and customization. ●What Does the Future Hold? When the broadcast, production, and distribution industries complete the transition to IP and digital technologies, the media industry will be able to connect seamlessly to IP networks, facilitating IP transmission of multi-rate video clips, including uncompressed HDTV, from outside editing studios. Besides video distribution, it will become possible to use IP networks for program creation, by implementing such advanced features as the use of stream transmission in place of video editing on video tape recorders, for tapeless storage and editing of video data. When it becomes possible to serve a broad range of needs in broadcasting and video-related fields, we can expect new media markets and next-generation video image processing IP services to be born. ●Activities K.Harada, T.Kawamoto, K. Zaima, S.Hatta. S.Meno, “Uncompressed HDTV over IP Transmission System using Ultra‐high‐speed IP Streaming Technology,” NTT Technical Review, vol.1, no.1, pp.84-89, April 2003. NTT: i-Visto Internet Video Studio System for HDTV Production, 2003: Exhibit at NAB (National Association of Broadcasters) 2003 2004: Exhibit at Inter BEE (International Broadcast Equipment Exhibition) 2004
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