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thielecg · 08-18-2010, 07:44 PM

Hello everyone, I am new and I am getting ready to outfit my Trex 500ESP with an FPV system. I want to fly with HD equipment not just record in HD does any one use a HD Video Tx.

halley · 08-19-2010, 08:03 AM

Quote:

Originally Posted by thielecg

Hello everyone, I am new and I am getting ready to outfit my Trex 500ESP with an FPV system. I want to fly with HD equipment not just record in HD does any one use a HD Video Tx.

No such thing yet. Well, not within the hobby realm. They are very high bandwidth devices, and none of the existing amateur channels are suitable. The home theater world offers devices that tout 20 meters as "long distance."

Besides, once you're flying, the low definition is not a problem. You're fully immersed and focused on the flight. You don't have time to count blades of grass or figure out if that's Vern or Marge down on the sidewalk. It's only later that the quality may seem lacking. So why take the risk of putting more expensive equipment on the bird than you actually need?

petter268 · 08-20-2010, 08:48 AM

Like Halley says, you dont need to have a HD view in your googles. Ofcourse, it would be awsome, but if you record in HD, its very funny to watch the fly trip afterwards

thielecg · 08-20-2010, 10:13 AM

Yes is would, I have a pair of HD Video Glasses and was thinking about getting the Go Pro HD Camera but I would need to have the transmitter as well. The Cam will record HD video on to flash memory. I can't find anything hobby size or price, maybe some day....

halley · 08-20-2010, 10:48 AM

Quote:

Originally Posted by thielecg

Yes is would, I have a pair of HD Video Glasses and was thinking about getting the Go Pro HD Camera but I would need to have the transmitter as well. The Cam will record HD video on to flash memory. I can't find anything hobby size or price, maybe some day....

The GoPro Hero HD has a composite (SD) output and a component output. They call the component output an HD, but it's not like an HDMI plug.

thielecg · 08-20-2010, 07:24 PM

RGB/Component is usually High Res.depending on equipment,HDMI is more for home theater applications because it carries the multiple audio channels as well. I think the Go pro has the HD/High Res. live output on the Component output but I will give them a call to find out since it is not clear on their web site.

Launch 1 · 09-10-2010, 03:24 PM

Could 5.8Ghz systems transmit HD? Just wondering...

HeliShredder · 09-10-2010, 06:31 PM

My conclusion is that using current technology, HD transmission for FPV is not possible. If by "HD" you mean the uncompressed digital video signal, like it is transmitted over an HDMI cable, the bandwidth of that signal is approximately 4Gbps. It will be difficult to transmit this amount of data over a wireless link. You may be able to use some UWB technology but then the range is insufficient for FPV. You could of course compress the video, using e.g. H.264, to a reasonable bitrate, say 3Mbps. But then you have the problem that you need to put a quite powerful computer in the heli to compress video and the compression/decompression also introduces a delay (among other things bc. motion compensated coding is used for video compression), which makes it pretty much unusable for FPV. Anyways, even if you had some fantasy low delay video compression technology, you still need to transmit 3Mbps over a long distance, which is difficult to do reliably.

Digital video transmission has also some other problems. One is that when you get out of range you will suddenly lose the whole video link without any warning, which is much worse than with analog video where you get more and more distortions as you approach the maximum transmission range.

thielecg · 09-12-2010, 08:27 AM

My thoughts exactly, I believe the best solution at this time is just to fly with the analog signal and record the flight in HD and enjoy later.

TioDave · 09-14-2010, 12:16 AM

http://www.edimaeg.com/camera.htm

HeliShredder · 09-15-2010, 09:13 PM

Quote:

Originally Posted by TioDave

http://www.edimaeg.com/camera.htm

Never for get the rule "If it sounds too good to be true it probably is". Although I do look forward to reviews of this product :o

alexsmith · 04-30-2013, 11:11 AM

Although this thread is a little old, I was researching on the same issue. While trying to find a HD transmitter, I came across this: http://boxx.tv/products/zenith/

Seems to be something new. Have a look at the videos on their website. Looks good.

Couldn't find information on costs, though.

Titusx · 04-30-2013, 02:48 PM

There are a couple of HD transmitter that could be in 1Km range, but they are in the 15.000 to 25.000u$s range. They work in 5,8GHz.
Boxx cost around 1600u$s, but it is limit to 100m.

All of them were design for broadcast.

Here are some HD transmitter systems:
http://shop.vtq.de/index.php?cat=c34...N-SYSTEMS.html
http://www.nebtek.com/products/Micro...ansmitter.html

08-18-2010, 07:44 PM	#1 (permalink)
thielecg Registered Users Join Date: Aug 2009	HD Video Transmitter Hello everyone, I am new and I am getting ready to outfit my Trex 500ESP with an FPV system. I want to fly with HD equipment not just record in HD does any one use a HD Video Tx.

08-20-2010, 08:48 AM	#3 (permalink)
petter268 Registered Users Join Date: Feb 2010	Like Halley says, you dont need to have a HD view in your googles. Ofcourse, it would be awsome, but if you record in HD, its very funny to watch the fly trip afterwards __________________ Don't drink and drive, just smoke and fly!

09-10-2010, 03:24 PM	#7 (permalink)
Launch 1 Registered Users My HF Map location Join Date: Sep 2009	Could 5.8Ghz systems transmit HD? Just wondering... __________________ www.youtube.com/user/launch1heli Diagnosed ERD (Extreme Rotor Deficit)

09-14-2010, 12:16 AM	#10 (permalink)
TioDave Registered Users Join Date: Sep 2009	http://www.edimaeg.com/camera.htm __________________ Youtube Tiodave.com

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08-20-2010, 10:13 AM	#4 (permalink)
thielecg Registered Users Thread Starter Join Date: Aug 2009	Yes is would, I have a pair of HD Video Glasses and was thinking about getting the Go Pro HD Camera but I would need to have the transmitter as well. The Cam will record HD video on to flash memory. I can't find anything hobby size or price, maybe some day....

08-20-2010, 07:24 PM	#6 (permalink)
thielecg Registered Users Thread Starter Join Date: Aug 2009	RGB/Component is usually High Res.depending on equipment,HDMI is more for home theater applications because it carries the multiple audio channels as well. I think the Go pro has the HD/High Res. live output on the Component output but I will give them a call to find out since it is not clear on their web site.

09-10-2010, 06:31 PM	#8 (permalink)
HeliShredder Registered Users My HF Map location Join Date: May 2010	My conclusion is that using current technology, HD transmission for FPV is not possible. If by "HD" you mean the uncompressed digital video signal, like it is transmitted over an HDMI cable, the bandwidth of that signal is approximately 4Gbps. It will be difficult to transmit this amount of data over a wireless link. You may be able to use some UWB technology but then the range is insufficient for FPV. You could of course compress the video, using e.g. H.264, to a reasonable bitrate, say 3Mbps. But then you have the problem that you need to put a quite powerful computer in the heli to compress video and the compression/decompression also introduces a delay (among other things bc. motion compensated coding is used for video compression), which makes it pretty much unusable for FPV. Anyways, even if you had some fantasy low delay video compression technology, you still need to transmit 3Mbps over a long distance, which is difficult to do reliably. Digital video transmission has also some other problems. One is that when you get out of range you will suddenly lose the whole video link without any warning, which is much worse than with analog video where you get more and more distortions as you approach the maximum transmission range.

09-12-2010, 08:27 AM	#9 (permalink)
thielecg Registered Users Thread Starter Join Date: Aug 2009	My thoughts exactly, I believe the best solution at this time is just to fly with the analog signal and record the flight in HD and enjoy later.

04-30-2013, 11:11 AM	#12 (permalink)
alexsmith Registered Users Join Date: Jan 2013	Although this thread is a little old, I was researching on the same issue. While trying to find a HD transmitter, I came across this: http://boxx.tv/products/zenith/ Seems to be something new. Have a look at the videos on their website. Looks good. Couldn't find information on costs, though.

04-30-2013, 02:48 PM	#13 (permalink)
Titusx Registered Users Join Date: Jun 2010	There are a couple of HD transmitter that could be in 1Km range, but they are in the 15.000 to 25.000u$s range. They work in 5,8GHz. Boxx cost around 1600u$s, but it is limit to 100m. All of them were design for broadcast. Here are some HD transmitter systems: http://shop.vtq.de/index.php?cat=c34...N-SYSTEMS.html http://www.nebtek.com/products/Micro...ansmitter.html

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