Explained: How FPV technology works - ANALOG
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- Опубліковано 11 кві 2021
- RC planes and drones increasingly rely on first-person view (FPV) video systems. This is a new whiteboard video explaining exactly how analog FPV technology for drones and RC planes works. This is part of a series of videos in which I will explain the technology behind the three major FPV systems:
- analog FPV
- Fatshark's digital FPV
- DJI's digital FPV
Let me know in the comments if the virtual white-board will do the job or if I should blow $500 on a new "real" white-board.
Also, if anything was unclear, feel free to ask a question. - Наука та технологія
If you compile all the white board videos in one big playlist, I'd binge watch'em all. Again. These videos are the reason and my first tools into this hobby. Thanks, maestro.
Great video Bruce! I've missed your tech talks! Thank you for the time and effort that went into this, fascinating to learn more about these systems .
Bruce, you might be able to answer this question about analog resolution. Now the term standard def is from the TV (625 TV lines) in fact there is also standard for Analog HD (1280 TV Lines) which was around in the early days of HD tv's. A typical FPV camera that say its 1000 lines and is a 4:3 sensor does that mean the camera has a resolution of 1000x750 and the 1000x750 picture is been transmitted back to your goggles. So in effect if your FPV camera has a 1200 TV Lines sensor then what you would see in the goggles would be near to the resolution of a 720p HD, 1200x900 (4:3) or 1200x675 (16:19) a analogue system is not bothered about how many lines are fed to it.
Sign of a great tutor. Straight forward excellent overview. Brilliant
Awesome. This is the thing you should do for the next generation. Everyone can do review the toys but only few like you can make educational video like this.
Bruce I LOVE your videos..The RC Community would be at a huge disadvantage without you in it....You sir, are awsome...HUGE THUMBS UP
You let the best part at the end, those examples of interference and multi pathing on DVR, really help me understand and diagnose my video issues.
When ever you do these sorts of videos, I already understand most of it, however I find them so relaxing and enjoyable to watch!! Love it!
I lost it at the bit about the moon being beyond visual line of sight and being illegal to fly to. Great vid Bruce! The digital whiteboard seems to be working well.
That’s a really good summary. Introducing my kids to the hobby and this explains key concepts in an engaging way, and should help them better understand what they are seeing when they fly.
thank you, it means a lot to newbies
the tablet's totally fine. you can copy and paste any image you want to show onto the whiteboard and draw diagrams directly on it
Another outstanding video. As usual Bruce you hit it out of the ball park [again] with this one.
So looking forward to the next two educational videos.
Keep up the excellent work.
Greetings from Florida USA
Thank you, thank you, thank you! This is THE BEST explanation regarding ANALOG TRANSMISSION AND RECEPTION ON THE INTERNET. Thank you sir! I stand by my decision to invest in an analog system, and THIS VIDEO is why. Digital is amazing, but it is in its infancy still.
best line of all: "gracefull degredation"
6:24 - that picture looks like "Bernd, the bread" a german kids tv series and figure with educational background ...
Whiteboard has worked great for me !
Can I get that drawing on a shirt please :)
No joking. I would so buy that shirt!
Me too!
Me three.
Make it 4!
The examples of good analogue video is absolutely gorgeous
I actually enjoy watching these kinds of technical videos which let me learn about radio and EE technology xD
Many thanks!
This is super informative and I really love these videos! Thank you!
An excellent course of Lectures on Radio Engineering!)) It seems like I remembered the institute !! About the quality of analog television. After all, then they were also engaged in the development of high-definition systems, but it turned out to be a dead-end direction. Best regards, Andrey Sokolov.
Bruce:
Your new white board works GREAT! Excellent contrast, sharpness, and the author has really preconceived his presentation so well it all fits on the screen as if it was done by a production company! Kudos! More! More! More! - Jim
Yes! love these kinds of videos, please keep them coming!
I prefer this method of presentation. No squeaky sound or pounding of marker against board. Strokes are consistent without fading ink. The presenter doesn't block parts of the board. It also reminds me of college overhead projector presentations in dark classrooms sitting next to a nice sheila.
Great presentation. I’m fan of your way of making explanation throughout the graphic set. Cool, thanks for sharing
Thank you very much for a great clear explanation. I look forward to the videos on the other systems to finally understand how they all work and compare.
Was just wondering this a few days ago - awesome video, thanks. I really like your explanations.
Thoroughly enjoyed that mate, relaxing and informative. Cheers
Michelson & Morley want a quiet word with you , regarding the Aether
Must have been sniffing the Ether , to mention the aether
:-)
Good vid .
I guess you're the first one to call snow in the video graceful 😁
Excellent presentation and explantion . Thankyou for uploading and that video at the end was a great ending .
Thanks Bruce. That removed a few cob-webs from my 1980 Navy Radio Apprenticeship course. Enough information to be understood and not too much to create confusion for RC modellers. Love the White Board Pad over the Physical White Board.
Love it, And yes put on a T-shirt, can,t wait for your tec video on the dji digital system
Exellent explanation, thank you Bruce.
Always impressed with your knowledge Bruce. Thanks. Digital white board does just fine.
Thanks, at last I know how it works,, a really good video to watch and understand.
Well, I can truly say I've been to school today. I must say, I did learn a few things. Well done Bruce
You say it simple and easy. I say it's magic. And to think, just a short time ago vacuum tubes were everywhere. I still have a TV with vacuum tubes in my workshop.
Thank you Bruce.
❤Thank YOU FOR VIDEO, COMPLETEY NEW TO FPV QUADCOPTER, REALLY APRICIATE IT
Thank you for the video. A follow-up video showing how to pick the right stuff and how to hook things up in a custom built model would be neat!
Good stuff Bruce, this is what you do best. :) I read a lot of post with kids re-flashing BetaFlight because they can't bind their Rx, fitting heavy CP antennas to their TinyHawks to increase range; there's a need for basic explanations of how stuff works.
Nice summary, thanks.
I like this white board replacement, very nice and legible. You can write, mark up, doodle, or whatever without ever getting in anyone's way. Guessing also save if you wish?
That was an excellent presentation, especially with the examples at the end. When you have all three posted the uneducated user will be able to make an informed decision, not one based on someone else's bias.
Yeah it's great, could also flip between 'pages' easily too I guess. Or scale everything a bit smaller to get some extra space on the same page...
Fantastic video, Bruce! Thanks a lot! 😃
Stay safe there with your family! 🖖😊
Excellent explanatory video:-)
You are a saint for publishing this.
thank you, that was very useful. looking forward to your other presentations. I have recently played with putting fpv on my model rc cars, now I know the poor image quality at times was multi pathing. who knew. again thanks, now I know how to get a handle on that.
I've got to say, the Foxeer Trex camera is so good that I am no longer in a hurry to go digital. When I think at how far analog has come in the last few years, it makes me wonder how much better it will be in another few years. I hope it will be at least twice as good as it is today in a few years.
very nicelly done, thanks! good luck!
Outstanding!
Thanks Bruce :-)👍🎉
Thank you so much, nice to have a hobby that helps with school lol
You are one of the reasons I love physics and won't deselect it in my next grade
Brilliant tutorial, thanks
Great class Sir!
Looking forward to the rest of the series
Very clear and I liked the comment about Mars and distance. Thanks.
Great Presentation But i do miss the facial expressions, have to do a talking head down in the corner lol.
Eevblog style!
👍👍 Great example at the end of the video!
Thx, very informative and good presentation
Great video Bruce, very clear explanation and I love the digital white board. One thing I think you may have overlooked in terms of latency is the fact that the 4 components the image is passed through (camera, VTX, VRX and then screen) are not in sync with each other. The image data passed between each component has to wait for the next cycle before the data is passed. Wouldn't this mean every time you plug in you will get a different latency depending on how close the component clocks are running? I have found another source of latency can occur when trying to record latency from a moment in time to the screen, because of the time between the event (led light turning on for example) and the camera shutter. This subject has been bugging me for ages and would love to hear you opinions.
Great educational video keep it up
Excellent stuff! Now I'm wondering, how can I improve the purity of my aether?
Great video. Liked the digital canvas. What camera and vtx are you using in the end shots Bruce?
Excellent. Even a dummy like me understands most of it. Just wish there was a real white board with Bruce in the video.
Great explanation
I don't even own one of these drones, still I really enjoyed the explanation of how this cool system works. Thank you
get one
Great comprehensive explanation about the matter! Only thing I have to add is the rapidfire explanation talks about antenna diversity (where you switch for the stronger received signal) as opposed to receiver diversity (switching for the better image). additionally rapidfire like clearview and others do some post processing on the output image itself too combining both received images in a clever way If I'm not mistaken
Great video i have learned a lot.. keep them coming. Fpv beginner.
*The pandemic reaches a fever pitch in the northern wilds of Canada*
RCModelReviews: Can I offer you a soothing FPV video in these trying times?
I have a question that I need conformation on.
I have always heard that you can use a 5.8ghz cloverlief transmitter ant. from the quadcopter for reception on goggles (analog) but not to use a goggle receiver cloverlief for a transmitter.
Is this true?
Good Info as always...✌🏼
Next up..
Bruce explains Fission vs Fusion...👍
Great video thank u.
Great video 💯❤️👊
Great video
What DVR are you using?? It's so clear!
Great overview....Thanks...🤔😀🇬🇧🇬🇧🇬🇧
Question: How does a high versus low resolution camera affect the resolution & quality of an image either viewed or recorded by a goggle/VCR in an analog signal system?
Love it!
Thank you for the videos, another great one. Learning a lot from you (: Was wondering if when you're doing the DJI one, you could explain the differences between it the Shark Byte, and what's make it so superior (or the Shark Byte inferior).
Yes, I'll be explaining SB and DJI and what makes them different. I think everyone agrees that the resolution and range of DJI is superior to SB but there are some areas where SB is superior to DJI due to the different technologies being used by each system.
I hope you do more tech time videos. Thanks!
Thanks for doing more tech videos. This patreon supporter approves.
Thanks again, Bruce - instructive as always. I'd second the 'combined playlist'!
The new 'whiteboard' works a treat.
Have you got a sheet of paper with the diagram on it, on top of the digi tablet? Else how did it all fit so nicely!
Enjoy(?) the influx of us Aussies with our new mutual CoVid Bubble today.
Thanks again.
can u explain remotes how to bind set channeks and understand the purpose of beta flight its so hard for may to get they give up
Do you know why my fatshark scouts freeze when I get low signal? Sometimes they just freeze for 5 seconds even if I fly back. Thanks.
I don't have any of the Scout goggles so I can't say for sure.
is the voltage fluctuation natural or is that deliberate?
Thank You!
Very interesting
Perfectly clearly
Great presentation! I like the new white board. I'm looking forward to your videos on digital fpv. If we can use a digital 2.4ghz cotrol signal to fly with dozens of others then why can't we use a 5.8 ghz digital video signal to do the same?
We can fly multiple RC systems on 2.4GHz because each system uses only a very small amount of the available band. Video, on the other hand, requires a huge amount of the band and therefore we are far more likely to see one system interfering with another. Also, with digital RC, the receivers (because they're digital) are able to ignore interfering signals to quite high degree. Analog FPV receivers have no such ability so are even more susceptible to interference.
@@RCModelReviews Oh, ok. Great explanation, thanks Bruce!
Hi is the video for digital already planned or is there a "release date"? Really looking forward to it please don't let us hang lol, thank you for your amazing videos!
7:00
when we say analogue camera, we do mean digital, right?
The cameras must be digital, it's just an analogue video transmission?
How can a sensor chip be analogue
Another disadvantage of Analog is that anyone with a analog receiver can see your video by simply scanning the freq band. It's as simple as that.
What are necessary for long range fpv videos and good video on long range
Outstanding presentation, and your white board diagrams were great too! Really helped me to understand the basic system of analog video.
Could you provide an explanation of how the resolution of the camera does or does not affect the delivered resolution of in the goggles?
For example if my camera has a resolution of 800x600 pixels but my display system has a max resolution of 1024x720 pixels, what will the image resolution be in the display system?
OR if the camera has a resolution of 1000x720, but my display system (binocular goggle or LCD) only has a max resoultion of 800x600, what will the image be rendered to and how does that happen? Will the camera image simply be cropped to 800x600?
You may need to make a separate video to address this, but I have wondered about it forever, but nobody so far has been willing to answer this question.
My question has practical relevance when we need to decide how much to spend on our camera for a given, more limited display/recording system. Does the higher resolution camera help get more detail in the display system images or not?
You are the best! - Jim
Yes, I'll be talking about bandwidth -- the thing that constrains the resolution of any system. It's a subject that deserves its own video.
Love the new whiteboard. ADSB soon?
2:40 I’ve never seen something **that** cheap. Where would you get that
Brilliant
The tablet white boards never look as good. Try cleaning with 80% window cleaner and 20% OF 50% OR LESS isopropyl. Always use a soft cloth, if you can do final sanding, it's too rough. Nice review and covered all 5he aspects I have been looking into with the exception of used VR goggles, but that is well beyond what anyone else would look into.
👍👍👍
do we use PAL or NTSC ?
It makes me wonder, why couldn't we use the same technology for higher resolution? Seems like the resolution was arbitrarily picked 50 years ago or so, and could be updated for modern displays
The digital whiteboard is fine. Bit it would be nice to also see your “talking head” somewhere.
What I don’t understand is the wifi disturbance you talked about. The wifi router is on the same frequency, so why isn’t the FPB image not completely blown away when are close to your wifi router? Does the VRX “recognize” the FPV image in some way?
More often than not the interfering signal is much weaker than the signal from the VTX so you can still see the image.
@@RCModelReviews Aha, thanks. Survival of the fittest it is...
I wonder if they will ever get a phased array FPV receiver...
Very clear. Thanks. No snow in your explanations. So I suppose you are digital. 😃
There is one thing I don't understand. Why is analog video stuck to the PAL or SECAM low definitions. Why didn't the FPV video industry come up with another standard ? With a higher definition ?