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IPTV - A Look From The Outside - Part 3

All streaming digital video broadcasts surrounding IPTV depend on compression techniques to provide very high quality video with compression ratios needed to serve the masses over a broadband connection whether it be cable or DSL. Some of the leading developers in this video compression technology include Tandberg and Harmonic Inc.

Tandberg Television creates products and systems for the delivery of high quality live video and on demand content across cable, DSL, fibre, IP, satellite and terrestrial networks providing systems integration and support capabilities through its operations in the Americas, Asia, Australia, and Europe. They have been a pioneer in video compression and hardware systems for the delivery of TV and on-demand content for the digital video market. Their iTTV Delivery Platform has been designed specifically for the television over DSL and FTTH market. It supports the delivery of TV and on demand services over both IP and ATM. Built on open solutions and compliant with leading international standards, they have one of the broadest range of cable products available, including descramblers and receivers, encoders, multiplexers with CA insertion and bit-rate changing capability, network adaptors to suit all the common core network distribution methods, QAM modulators and comprehensive control and monitoring systems.

Harmonic’s Convergent Systems Division develops standards-based products that effectively multiply the delivery capacity of existing network infrastructures. Digital video products include multiplexers, stream processors, the high-capacity gateways for video-on-demand, and the DiviCom® family of encoders. Advanced technology solutions provide ultra-low bit rate encoding and digital stream processing, in addition to the statistical multiplexing of HD, SD and data streams. With nearly 20,000 real-time digital encoders deployed by DTH satellite, cable, terrestrial broadcast and telecoms network operators, Harmonic has the largest installed base in the world. They provide flexible and cost-effective digital headend solutions for cable system providers - designed to accommodate broadcast and on-demand narrowcast services. Their products are based on open standards such as MPEG-2, DVB, SNMP and DVB SimulCrypt, allowing service providers to select from a range of conditional access technologies, set-top boxes and EIS/scheduling systems. Harmonic’s telco architecture is based primarily on MPEG-2 encoding and some digital turnaround of MPEG-2 content in a headend, as well as distribution to the home terminal over an IP (FTTH) or ATM (xDSL) infrastructure.

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