NEWSNTT succeed on live transmission and streaming of 4K spherical images at Siggraph Asia 2009 Siggraph Asia 2009, Yokohama, 19 December 2009 - Nippon Telegraph and Telephone Corporation (NTT) successfully demonstrated a live transmission of a streamed 4K spherical image across a distance of 500km utilizing the i-Visto Gateway XG-1. The 4K resolution video stream was sent from a location at the Asahi Broadcasting Corporation (ABC) to networked dome theatre in Yokohama over a 10 Gbit/s IP network. The Theatre site was a nine meter tall theater dome, capable of displaying the high definition spherical live stream of Osaka, creating a state-of-the-art immersive experience for the audience. At the core of this demonstration were two i-Visto gateway XG-1 at the Asahi Broadcasting Corporation transmission site. The XG-1 converts the High Definition signal from the 4K camera to IP packets within 15 milliseconds, and transfers the uncompressed data through a ten-gigabit ethernet interface. On the receiving end 500 Kilometers away in Yokohama, two i-Visto gateway XG-1 were utilized for receiving and converting the data packets into the live video presentation. The i-Visto gateway XG-1 is a breakthrough low-latency transmission system that handles multiple HDTV streams using a 10-Gbit/s network interface. It can support simultaneous transmissions of two discrete high definition video signals at speeds of up to 1.5 Gbit/sec. In addition, the XG-1 supports a high precision video clock synchronization scheme between multiple i-Visto gateway XGs. The XG-1 can simultaneously convert two HD-SDI/SD-SDI signals from/to IP packets within 15 millisecond and transfer them through ten-gigabit ethernet interfaces without compression.
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