WP72 Superguide 1 | ADVANCED DISTRIBUTION: CDNS, ANALYTICS, QOS, AND QOE JANUARY/FEBRUARY 2017 SPONSORED CONTENT
Network services connect the Content Control Layer
to a distributed edge. These include request routing, load
balancing, and support for multi-tenancy. These functions
need to scale to very large volumes of viewing requests—
characterized by many small transactions—and are delivered
with a software-based routing layer, that also runs on
standard IT or cloud infrastructure. This layer uses a TCP
stack optimized for TV, that can correlate viewing analytics
to net work behavior.
To create personalized TV streams for huge numbers of
viewers, Edgeware’s Delivery Layer uses distributed TV Edge
Servers. The TV Edge Servers perform functions such as
streaming, caching, repackaging, pause-live TV, ad insertion
and encryption. The TV servers can be virtualized, running in
software on general purpose servers or cloud I T infrastructure,
or they can be pre-integrated with hardware accelerated TV
servers. This enables a unique deterministic experience for the
viewer, so that you can deliver TV without buffering and with
time-delays of a fraction of general-purpose systems.
TV CDN FUNCTIONS EXPLAINED
For a TV CDN to delivery high quality TV at scale, it will need
to include several different functions:
TV Content Capture
TV Content Capture ingests and records
your live content to enable VOD and timeshift TV, so that you can offer TV services
such as live-to-VOD, SVOD, cloud DVR,
pause-live, catch-up, and restart TV. You can simultaneously
record and deliver thousands of programs to millions of
viewers. It is also highly scalable as traffic level grows.
TV Repackaging converts your live and
VOD assets to the different streaming
formats required by today’s devices such
as HLS, MSS and DASH. You can rapidly
support new packaging requirements as new client devices
are introduced. Content can also be encrypted according
to its digital rights management (DRM) schemes. Both
repackaging and encryption should be done on-the-fly,
either centrally or at the edge of the network. This means
that you only have to keep a single copy of your video
assets and the right ABR formats are generated on request.
It also means that you can support your existing libraries
without the need to re-encode these assets. This results in
significant savings in storage.
TV Delivery is at the heart of the system. It
creates an amazing viewing experience by
dynamically caching the most popular TV
content closer to your IPTV and OT T viewers,
then streaming it from the edge of the network.
It should also be able to personalize the stream to
deliver start-over, catch-up, pause-live TV, and serve
multiple device types directly at the edge without the need
to go back to the source content and fetch lots of different
versions. With larger libraries and longer recording
windows, this solution offers huge scalability as demand
grows. It prevents backhaul capacity bottlenecks and the
need to ‘rip and replace’ existing infrastructure. Ideally,
as in the Edgeware solution, the content only needs to be
ingested once, before it is automatically distributed to
multiple delivery servers in a cluster. Assets can then be
distributed intelligently over multiple clusters to build a
TV Director selects the best delivery option
based on client location, content distribution
and server load. The software also supports
content policy enforcement such as geo and
device blocking, limiting concurrent streams per customer,
and floating sessions during change in client IP.
Having a single router for all content requests helps you
gain better control over policy enforcement, maximize
performance, get better visibility over your TV delivery, and
increase the quality of your TV delivery by routing requests
to the best streamer or CDN.
Multitenant CDN functions enable
those of you with existing CDN
infrastructure to resell your capacity
to content providers, aggregators,
broadcasters, and other providers in the ecosystem such
as the ISPs. The software leverages existing resources,
maximizing the investments you have already made and
increases revenue opportunities.
Tenants are able to directly control their own TV content.
External origins can be added through APIs. You, as network
operators, are able to provide monitoring and reporting to
each tenant and ensure the right amount of resources are
provisioned and used. The software also supports content
rights enforcement such as geo or device blocking and
maximum concurrent sessions policy.