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RS 170 .vs. NTSC

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Rob Waterbury

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May 7, 1996, 3:00:00 AM5/7/96
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Can someone tell me or provide me a lead as to the difference between
RS170 and NTSC video formats?

Thanks in advance.

----------------------------------------------------------------------------------
Rob Waterbury | H20 is hot water and
Center for Ocean Technology/Univ. of S. FL | CO2 is cold water!
140 7th Ave South | -anonymous student
St. Petersburg, FL 33701 |
(813)553-3959 |

Charles A. Poynton

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May 8, 1996, 3:00:00 AM5/8/96
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In article <4mo3fp$f...@mother.usf.edu>, wate...@marine.usf.edu (Rob
Waterbury) wrote:

> Can someone tell me or provide me a lead as to the difference between
> RS170 and NTSC video formats?

"RS-170" refers to 525/60 monochrome television, that is, 60.00 Hz field
rate. "NTSC" dates from 1953, and refers to composite color video with 525
lines, 59.94 Hz field rate, and a color subcarrier of about 3.58 MHz. Both
of these designations are hopelessly out of date. The contemporary
reference for so-called NTSC is SMPTE 170M - see <http://www.smpte.org/>.

Though EIA pubished a tentative document in 1976, EIA never actually
adopted revision A to RS-170. You will find thousands of people who will
tell you otherwise: Challenge them to come up with an EIA title page that
says "EIA RS-170-A," or any related document that does not say "EIA
Tentative Standard."

Forgive the blatant self-promotion, but this question is answered in
detail in Chapter 11 of my book:

Charles A. Poynton, A Technical Introduction To Digital Video. New York:
John Wiley & Sons, 1996. USD 42.95, CAD 60.50. ISBN 0-471-12553-X.

You can find information about the book on this web page:

<http://www.inforamp.net/~poynton/Poynton-T-I-Digital-Video.html>

C.
-----
Charles A. Poynton
Poy...@inforamp.net [Mac Eudora/MIME/BinHex]
<http://www.inforamp.net/~poynton/>
-----

Robert Smith

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May 10, 1996, 3:00:00 AM5/10/96
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Rob
There was a big (well, medium) argument over this about a
week ago, in which I made rather an ass of myself! Scan the
back postings. I recall a reference to a book on TV standards,
and also Brooktree (the DAC people) publish such a book.
Considering their importance, there are surprisingly few
references on the basic standards and practices of TV.

Good HUnting

Bob

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