home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: sci.electronics
- Path: sparky!uunet!usc!aero.org!helfman
- From: helfman@aero.org (Robert S. Helfman)
- Subject: Re: NTSC video to VGA conversion?
- Message-ID: <1992Aug26.190108.29148@aero.org>
- Sender: news@aero.org
- Organization: The Aerospace Corporation, El Segundo, CA
- References: <1992Aug24.064613.5022@ee.ubc.ca> <5170216@hplsla.hp.com>
- Date: Wed, 26 Aug 1992 19:01:08 GMT
- Lines: 20
-
- In article <5170216@hplsla.hp.com> tomb@hplsla.hp.com (Tom Bruhns) writes:
- >jmorriso@ee.ubc.ca (John Paul Morrison) writes:
- >
- >>Has anyone seen or built a project that will convert an
- >>NTSC input signal into something displayable on a VGA monitor?
- >
- >VGA scans at about 31.5kHz; NTSC has a horizontal rate of about
- >15.75kHz. If you don't do something to correct the difference,
- >you will get the right and left halves of the picture overlaid
- >on the monitor. Correcting the difference involves buffering
- >up quite a bit of data at the NTSC rate so it can be hosed to
- >the monitor at the faster rate. Good luck doing it in one or
- >two ICs with current state of the art.
-
- There is off-the-shelf stuff to do this. I have seen (at Fry's
- Electronics and elsewhere) a PC card that does precisely this.
- It has a $200+ price tag - a big ticket for the ability to watch
- the soaps when the boss has his back turned!
-
-
-