Optical Networking White Papers
Advanced Optical and Digital Architectures for Video On Demand
Overview
In the future an increasing amount of video content will be provided to the cable subscriber as an on-demand service rather than a broadcast service. This advanced service can be
expected to become a very significant portion of the revenue stream for cable operators. Historically the high costs of video-on-demand (VOD) have discouraged significant deployment. The falling costs of computing power and digital hardware, combined with innovative hybrid fiber-coax (HFC) transport techniques such as dense wavelength division multiplexing (DWDM), are now making the business case much more appealing.
In this paper we will review how one can centralize the video server hardware in the headend and use DWDM to transport the digital video streams in 'on channel' QAM256 format out to the hubs. Once at the hubs, the VOD channels can be easily combined with the broadcast
content and then routed out to the subscriber. The paper will review the technical issues, performance, and approximate costs of a 16 wavelength DWDM system for VOD transport.
| Publisher | Harmonic | File Format | PDF, requires Acrobat Rdr 5 |
|---|---|---|---|
| Date Published | October 2000 | Downloads | 8 |
| Format | White Papers | ||
| Topics | |||
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