Digital Video Streaming Services for Broadband Networks
A Cost-Effective Solution for Multicast Video Content Distribution
Clarendon Foundation is pleased to announce the deployment of its TV America® network, a digital video streaming service for broadband networks. TV America® uses newly developed multicast video transmission technology to deliver public interest and educational programming.
The new content delivery service is designed to support transmission of real-time digital video in both standard resolution (NTSC) and high definition (MPEG) over WiMAX wireless networks and other broadband Internet access platforms. Current Internet video delivery is typically costly and poor in quality.
TV America® is initially available to broadcast real-time digital video on Educational Broadband Service (EBS) channels in the 2.5 GHz band within licensed coverage areas over public or closed circuit networks. A video server and set-top boxes create another method of video content delivery, other than cable TV systems or satellite networks, for programming produced by educational institutions, nonprofit organizations, military departments, and government agencies.
TV America® will later be carried via the new Internet Protocol (IPv6) that is beginning to be deployed in the United States. IPv6 is expected to revolutionize the delivery of online video content by using a much larger data packet and improved routing. TV America® will have the ability to distribute full-screen video broadcasts to millions of viewers over “IPv6-enabled” broadband data networks at very reasonable costs.
Network Architecture and Transmission Capabilities
TV America’s® network architecture uses industry standard TCP-IP all-digital networks for reliability and easy integration into user networks.
High levels of network security are ensured through the use of advanced all-digital wireless technology and encryption.
Standard definition full-screen video streams require 720 kbps, and about 3 Mbps for high definition video streams. A single high-power midband EBS channel (6 MHz) has the capacity to transmit up to 8 simultaneous NTSC video streams or 2 HDTV video streams; lower band and midband EBS channels (5.5 MHz) can carry up to 7 NTSC video streams or 1 HDTV video stream.
Internet Protocol Version 4 was the dominant network layer protocol adopted in 1981 that connected together hundreds of millions of personal computers and servers. IPv6 is an expanded protocol for the “new Internet” that dramatically expands online capabilities by:
- Enabling multicast services (that is, the ability to simultaneously deliver content to multiple IP addresses) and mobile usage (for vehicle applications);
- Providing a higher quality of service (QoS), particularly in terms of timeliness (latency) for continuous, clear audio and video transmissions; and
- Implementing advanced security features, including geospatial routing, which encourage use of encryption and authentication to control spam email, viruses, and spyware.