Author Topic: Transmitting analog video and audio signals?  (Read 2744 times)

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Offline blackbeardTopic starter

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Transmitting analog video and audio signals?
« on: June 06, 2011, 03:04:00 PM »
I know that an atmel328 is simply not powerful enough to process video signals however i have bought CCTV video transmitters so that i may transmit directly to my tv. These transmitters are however pretty expensive so i'd lke to know if there is an inexpensive way that i could accomplish this same task rather then buying $40 transmitter and receiver sets?
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Offline rbtying

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Re: Transmitting analog video and audio signals?
« Reply #1 on: June 06, 2011, 05:04:22 PM »
$40.00 sounds about right - most setups are actually more expensive than that.  You could try getting a set with multiple transmitters and only one receiver, which would be cheaper per robot (presumably you don't need to show video on more than one screen).
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Offline blackbeardTopic starter

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Re: Transmitting analog video and audio signals?
« Reply #2 on: June 06, 2011, 07:37:21 PM »
Quote from: rbtying on June 06, 2011, 05:04:22 PM
$40.00 sounds about right - most setups are actually more expensive than that.  You could try getting a set with multiple transmitters and only one receiver, which would be cheaper per robot (presumably you don't need to show video on more than one screen).

i'm more looking to reduce the size and have a circuit integrated integrated into my project. would something like this work with the appropriate receiver?

http://www.sparkfun.com/products/8946
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Offline waltr

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Re: Transmitting analog video and audio signals?
« Reply #3 on: June 06, 2011, 08:19:18 PM »
no
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Offline billhowl

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Re: Transmitting analog video and audio signals?
« Reply #4 on: June 07, 2011, 04:35:33 AM »
http://hackingelectronics.blogspot.com/2011/06/acquiring-images-from-analog-camera.html
Take a look on this, you may be able to send your video using that sparkfun transmitters if you don't mind the speed.
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Offline blackbeardTopic starter

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Re: Transmitting analog video and audio signals?
« Reply #5 on: June 08, 2011, 05:00:32 AM »
Quote from: waltr on June 06, 2011, 08:19:18 PM
no

care to elaborate? :P

Quote from: billhowl on June 07, 2011, 04:35:33 AM
http://hackingelectronics.blogspot.com/2011/06/acquiring-images-from-analog-camera.html
Take a look on this, you may be able to send your video using that sparkfun transmitters if you don't mind the speed.

just saw that on HAD :P it might be worth looking into.
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Offline waltr

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Re: Transmitting analog video and audio signals?
« Reply #6 on: June 08, 2011, 07:08:26 AM »
Quote from: blackbeard on June 08, 2011, 05:00:32 AM
Quote from: waltr on June 06, 2011, 08:19:18 PM
no

care to elaborate? :P

The OP implies that he has a a video camera that outputs an analog signal, either NTSC or PAL.
Quote
i have bought CCTV video transmitters so that i may transmit directly to my tv
This requires several MHz of Analog bandwidth and the Transmitter/Receiver needs to modulate/demodulate this analog signal. The SparkFun transmitter he linked to is for digital signals up to 4800Hz.
The only way to use that transmitter is to digitize and capture a video frame then send that frame over the RF link. This requires additional circuits, would be very slow and maybe get a frame every few seconds.
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