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MillimeterNTT Develops Linux-Based System to Deliver Real-Time HDTV Video Over the Internet
Oct 29, 2001 12:00 PM
TOKYO-Oct. 29, 2001--Nippon Telegraph and Telephone Corporation (NTT) 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).
Low-Cost Implementation
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.
For more information on the organization, go to their website at http://www.onlab.ntt.co.jp.
