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Implementing 1+1 RF Redundancy with the SMD-989
Satellite modulators sit at a critical point in the delivery chain for a video distributor.
When a satellite link goes down, thousands, or even millions of customers can lose their video
feed. Telephones of the provider's customer service center all the way up to the network
operations center will begin ringing, and in no time, a mad scramble to diagnose and repair the issue will kick off.
Redundancy switch design may seem outwardly simple, but the switch's positioning as a single point of failure in the broadcast
chain requires that it be designed with a high degree of reliability and robustness in mind.
The switches discussed in this system embody these qualities, and have been qualified as compatible with the SMD 989.
In addition, they provide the proper interfaces for maximum system redundancy when coupled with the SMD 989.
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Leveraging video transcoding in head-end and hub architectures
Professional broadcasters today face an ever growing array of new technologies, distribution options, format choices,
and new and changing standards. Content providers have many choices for distributing digital video via satellite,
over the air, and through IP networks. New technologies such as H.264 compression and DVB-S2 modulation offer enticing
ways to reduce operating costs, increase quality, or offer new services to subscribers. In addition, the switch from analog
to digital video topologies and adoption of high definition services creates the transitional need to simultaneously
integrate new equipment while supporting legacy devices and services from end to end in the delivery chain.
The result is that today's video distribution infrastructures carry compressed video as high definition or standard definition,
encoded with different compression algorithms, and bundled with various types of audio and ancillary data services. Service
providers must receive this variety of content and normalize it for delivery to the last mile network.
This paper discusses how to best utilize video transcoding techniques both in content normalization for the last mile and in
improving bandwidth efficiency in the distribution network. Three different use cases are examined along with an in-depth
discussion of the optimal configuration of a video transcoder in each case.
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