[comp.graphics] NTSC to Analog RGB

duerksen@bsu-cs.UUCP (Joel L. Duerksen) (04/02/89)

Does anyone know of a small, and hopefully inexpensive piece of hardware
for converting NTSC video to Analog RGB?  What I am hoping to do is
to utilize this expensive Apple RGB monitor for more than just my computer
graphics.  With the right converter I should be able to use it as a TV
when hooked to the NTSC output on a VCR.  Could someone please send me the
address of a company which makes a converter of this sort.  Thanks in advance.

   
----
Joel Duerksen  UUCP:  <backbones>!{iuvax,pur-ee}!bsu-cs!duerksen

-- 
----
Joel Duerksen  UUCP:  <backbones>!{iuvax,pur-ee}!bsu-cs!duerksen

myers@hpfcdj.HP.COM (Bob Myers) (04/05/89)

>Does anyone know of a small, and hopefully inexpensive piece of hardware
>for converting NTSC video to Analog RGB?  What I am hoping to do is
>to utilize this expensive Apple RGB monitor for more than just my computer
>graphics.  With the right converter I should be able to use it as a TV
>when hooked to the NTSC output on a VCR.  Could someone please send me the
>address of a company which makes a converter of this sort.  Thanks in advance.

There are several ICs intended for the consumer electronics industry which
do exactly this; the Motorola TDA3330 in their Linear and Interface Databook
comes to mind as one example.  However, you must realize that "NTSC" video
also implies a certain timing - that used by standard television, which is
basically 60 Hz interlaced vertical, 15.734 kHz horizontal.  If your
RGB monitor cannot accept this timing, and I suspect that it will not, then
simply converting the NTSC video to RGB signals won't buy you anything.


Bob Myers  KC0EW   HP Graphics Tech. Div.|  Opinions expressed here are not
                   Ft. Collins, Colorado |  those of my employer or any other
{the known universe}!hplabs!hpfcla!myers |  sentient life-form on this planet.