Tokyo, Japan — (press release excerpt) — Nippon Telegraph and Telephone Corporation (NTT) says it has successfully developed the world's first system for delivering 1.5 Gbps volume uncompressed HDTV video data in real time over the Internet. NTT will exhibit the
Linux-based system during the International Broadcast Equipment Exhibition (InterBEE 2001) at the Nippon Convention Center from November 14… to 16, 2001.

The system, developed by NTT Network Innovation Laboratories, uses PCs with HDTV interfaces and super-high-speed network interfaces. The system was deployed in Tokyo between the NTT Musashino R&D Center and the University of Electro-Communications. HDTV images were transmitted over an IP Internet connection using a 2.4-Gbps fiber-optic line. The processing capacity of a 1.5-Gbps uncompressed HDTV video data stream can support up to 70 HDTV-quality MPEG-2 streams (22 Mbps per stream) or 150 to 300 DVD-quality streams (5-10 Mbps per stream).

The system consists of commercially available PCs and HDTV interfaces, running on Linux. A number of speed enhancement techniques were applied to the operating system and the application program to support Gbps-class streaming data, including optimizing the internal bus scheduling and memory access, and parallel processing using multiple processors. The system will eventually be capable of manipulating the processing of video contents.

NTT Network Innovation Laboratories are continuing to assess the protocol processing of Gbps-class streaming data over the trial system, while at the same time exploring the applicability of the system to caches, servers, and mirror sites with the ultimate aim
of building large-capacity streaming content delivery networks.

The NTT Network Innovation Laboratories are affiliated with the NTT Science and Core Technology Laboratory Group, one of NTT's three laboratory groups . It is divided into two locations — in Yokosuka and Musashino — and is involved in research and development of network systems for the future.

 
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