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The two biggest challenges in designig a TV set (or any other application for that matter) to redistribute decoded content through a home network or the internet for access by another device are the (variable) bitrate contraints imposed by an ever changing medium and the enormous variety of possible destination devices, each with different codec/bitrate/resolution contraints.
The tables below list a few examples of network bandwidths and of destination devices capabilities.
| Networking
type |
Indicative
average bandwidth |
| Internet |
2
Mbps |
| Wireless |
20
Mbps |
| Ethernet |
100
Mbps |
| Powerline |
130
Mbps |
| MOCA |
100
Mbps |
| HomePNA |
128
Mbps |
| Device |
MPEG-2 |
H.264 |
VC-1 |
Max
Resolution |
Max
bitrate |
| uncompressed
HDTV |
|
|
|
1920x1080 |
1.5
Gbps |
| iPod |
|
yes |
|
320x240 |
768
Kbps |
| Zune |
|
yes |
yes |
320x240 |
736
Kbps |
| PSP |
|
yes |
|
480x272 |
1.5
Mbps |
| Laptop |
yes |
yes |
yes |
1920x1080 |
50-100
Mbps |
| 2nd
TV |
yes |
yes |
no |
1366x768 |
20
Mbps |
| * capabilities
for these devices are indicative and depend
on both hardware and firmware |
The Q driven solution
Embedded in the TV chipset, Q allows for seamless, real-time content repurposing to a variety of formats and bitrates. Q multi-codec support ensures that the content can be streamed in real-time to any receiving device at a touch of a button or saved to local storage in the most effective format and retrieved for re-delivery afterwards.
For example, HD broadcast signals
can be transformed from a 20Mbps MPEG-2 stream to
a 8-10 Mbps H.264 stream of the same resolution
and stored on internal flash. The content can then
be redelivered as a 720p24 5Mbps H.264 stream over
wi-fi to a laptop or another TV in the house, as
a 480x272 800Kbps MPEG-4 stream to a PSP, etc.
Secure streaming
Q offers integrated digital right-management capabilities, enabling protection of premium content by standard or proprietory Digital Rights Management (DRM) algorithms during the transcoding process and before it being streamed or stored. Q secutiry features include OTP key stores, an OTP boot ROM, AES/3DES crypto block and a programmable DRM engine.
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