| The
LinkDV terminals in the remote stations are
equipped with the standard LinkXX hardware
and software modules: |
|
QoS / ToS Router. |
|
8 mb/s modulator. |
|
8 mb/s demodulator. |
|
SCAN
module. |
| |
| The
LinkDV can also be equipped with: |
|
Video
capture card - captures and digitizes analog
video. |
|
Video
compression card - encodes uncompressed digital
video to H.264, MPEG2, MPEG4, or Even Technologies
PSI. |
|
Encryption
engine - provides content security and prevents
unauthorized reception. |
|
DVB IRD - low cost receivers for high data
rate, high volume applications. |
|
High
demodulators - up to 100 mb/s. |
|
|
Contribution
Video |
In a contribution
network, video from remote points is transmitted
to one or more central points for editing
and content delivery. Higher priority
video may be sent immediately, and lower
priority content can be stored and forwarded.
For on-demand high priority contribution,
the LinkDV hunts for an available RF channel
as soon as the video starts streaming
from the encoder. If there are no available
channels, the LinkDV will start spooling
to non-volatile media and continue to
search until an available channel is found.
If the circuit is intended to be store
and forward, the spooling would commence
first and then the system would look for
a suitable channel or would wait until
an off peak hour to send the video.
|
Allocated satellite
spectrum for contribution networks is
segmented into pooled channels, similar
to a LinkIP STAR network. The hub station
(collection point for the video) has as
many demodulators as the number of available
RF channels. Remotes seize available channels
when the need arises to transmit video
on-demand to the hub. Since video systems
are generally low recurrence circuits,
there are typically a relatively low number
of channels for a fairly large number
of contributing stations, for example
5 or 6 channels to serve 200 remotes.
Bandwidth savings can be significant for
this type of network with combined use
of the SCAN bandwidth manager and advanced
compression techniques, such as H.264
Part 10 (AVC).
|
A low data
rate outbound carrier can be used to maintain
contact and handle light inter-office
traffic. The LinkDV’s can also be
equipped with an encryption engine to
permit full protection of the content
being transmitted.
|
| Video
Distribution |
A distribution
network broadcasts video content from
a central site to multiple remote sites.
Distribution networks often have a contribution
component, with one or more remote sites
equipped for video/ data transmission
back to the central site.
|
New video compression
algorithms and evolving satellite modulation
technologies and forward error correction
techniques are enabling broadcast quality
video with unprecedented bandwidth efficiency.
The LinkDV will accommodate the new PCI-based
hardware and software encoder / decoders,
as well as advanced modulators and demodulators.
|
| LinkDV
advantages for distribution applications are: |
|
Advanced Bandwidth Management
- The SCAN bandwidth manager allows complete
network automation, for true on-demand access. |
|
Single Box Solution -
can be equipped to be both encoder and decoder,
and thus can be used at both the transmission
and reception ends of a digital video link. |
|
Modular Architecture
- PCI architecture allows use of plug-in
video encoders, decoders, modulators, demodulators,
and IDRs in the same chassis. |
|
IP
Transport - Native IP transport allows LAN/
WAN routing of video. |
|
Security
- Industry leading encryption affords highest
degree of security. |
| |
The LinkDV
solution is ideally suited for emerging
video distribution technologies such as
Digital Cinema, Video-On-Demand, and DVD
Delivery. The integral advanced video
encoding and security capabilities of
the LinkDV are unique to the industry.
|
The SCAN bandwidth
manager gives the solutions the ability
to determine video feed priority on-the-fly.
The LinkDV can look at bandwidth availability
and QoS level of the requested feed, and
then make the determination whether to
transmit immediately or store and forward
the video for future delivery.
|
|
|
See Large View |
LinkDV VIDEO CONTRIBUTION/
DISTRIBUTION NETWORK
|
|
