From: "Ralph Wade Phillips"
Subject: Re: Storing / Retrieving Video Data with RAM
Date: Wed, 13 Nov 2002 09:45:55 -0600
Organization: Phillips Enterprises
References: <36C7FAF578DB3B42.2D5D36053AB02069.6012E473C7158C02@lp.airnews.net> <3DD25E3B.1150ECC5@imec.be>
NNTP-Posting-Host: ralphp.microgear.net (220.127.116.11)
X-Newsreader: Microsoft Outlook Express 6.00.2800.1123
"Doug Hortvet" wrote in message
> Thanks for your reply.
> I do not know exactly what a framegrabber extension card will / can
> do, but the system I need must be very compact, light weight and
> consume minimum power.
> So far I have determined that DVR's (some, perhaps not all) store the
> data to a HDD, rather than RAM.
> The end use for this system is to record live video during a model
> rocket flight, hence the need for small size and light weight.
> I envision using a small single board CCD that outputs NTSC,
> sufficient RAM to store 30-45 sec. of video, and whatever intermediate
> electronics are required to get the encoded / compressed video data
> into and out of the RAM.
Transmit to a ground station, and compress / store it there.
You're forgetting how much RAM it will take to store a picture, and
the power requirements to keep it running. Much simpler to transmit and
receive it someplace where you've got more power to handle it.
AND - if you don't have the battery power to run a milliwatt
transmitter, you don't have the battery power to run the RAM and keep it up.