Re: add video to dc power and then later recover video

Homer J Simpson wrote:

<anbeyon@xxxxxxxxxxxxxx> wrote in message
news:1171574645.717983.190490@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

I have an application where I have a dc powered video camera. I'd
like to add the video (composite) to the wire feeding the camera with
power and then elsewhere in the system recover the video and feed it
to a monitor.

Is that possible ?

Probably

How ?

Filter the DC out with an inductor.

Try it and see if it works. Ideally you want a piece of coax cable.

The problem with adding DC to the raw video is that video is DC coupled.
The filter at the other end will take out the reference to the black
level. One could build a circuit to recover it, but that would probably
be more involved than RF modulation.

BTW, Martin's idea for a 2.4 GHz wireless link would seem to be the best
if one cannot modify or add to the truck wiring. 100% off the shelf
solution.

--
Paul Hovnanian mailto:Paul@xxxxxxxxxxxxx
------------------------------------------------------------------
Opinions stated herein are the sole property of the author. Standard
disclaimers apply. All rights reserved. No user serviceable components
inside. Contents under pressure; do not incinerate. Always wear adequate
eye protection. Do not mold, findle or sputilate.
.

Relevant Pages

  • Re: Video renderer stops rendering at reaching the former stop pos
    ... with mpeg1) and use for this purpose a custom source and splitter filter ... seconds to the current duration to follow the growing video. ... To get the video renderer to display again I can either do a seek from ... splitter with flagged as discontinuity. ...
    (microsoft.public.win32.programmer.directx.video)
  • Re: DirectShow @ WM 5.0: Capture camera to memory?
    ... The still image pin will most likely expose higher resolutions than ... the capture pin which could negativly impact your performance, ... You'll need to create a sink filter that does your processing, RGB video ...
    (microsoft.public.pocketpc.developer)
  • Re: Hardware Overlay with Push Source
    ... There is no difference between filters: an upstream filter ... The Video Renderer accepts YUV formats if the video graphics ...
    (microsoft.public.win32.programmer.directx.video)
  • Applying an offset to timestamp prevents smooth playback
    ... In other words, it's a do-nothing filter. ... Converter -> Video Renderer ... for a second or so then another 2 or 3 frames play and so on. ...
    (microsoft.public.win32.programmer.directx.video)
  • Re: Video Capture Performance with directshow
    ... As for your question about video encoding, that is similar what we're doing ... The output pin on the filter is running ... so it slowly feeds data into the WMV encoder as ... delved into it a bit and found that it was a capture filter from HTC ...
    (microsoft.public.pocketpc.developer)