Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!tut.cis.ohio-state.edu!purdue!mentor.cc.purdue.edu!g2i
From: g2i@mentor.cc.purdue.edu (Kyler Laird)
Newsgroups: sci.electronics
Subject: Chips for Digital Video
Summary: request for info
Message-ID: <4942@mentor.cc.purdue.edu>
Date: 6 Nov 89 18:48:13 GMT
References: <3600@ur-cc.UUCP> <17660028@hpfcdj.HP.COM> <3699@ur-cc.UUCP> <2653@isc-br.ISCS.COM>
Reply-To: g2i@mentor.cc.purdue.edu (Kyler Laird)
Organization: Purdue University
Lines: 18

I'd like to experiment with creating some TV accessories.  They would require
digitized video.  I was flipping through an '88 Newark catalog and noticed that
TI makes/made a 40/50MHz video processor chip and support chips for color
operation.  I don't know what the limitations are with the complete setup.

Questions:
1)  What are the requirements for a decent picture?  Isn't the vertical res.
    ~350 lines?  What's an acceptable horiz.?  How many colors?
2)  Are there chips/chip sets available to do this job?  My girlfriend's VCR
    has a digital still frame that seems to be based on essentially what I'm
    looking for.
3)  What is the difference between DRAM and VRAM?

E-Mail or posting fine; I think it's an interesting topic so I'll post a summary
of E-mail responses.

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Kyler Laird                  I'm  the NRA             ky@en.ecn.purdue.edu