Posted by Bill Vermillion on 11/04/01 11:40

In article <1140405908.766423.252210@f14g2000cwb.googlegroups.com>,
davesvideo@aol.com <davesvideo@aol.com> wrote:
>Biz wrote:
>> Sorry, you are correct, brainfart here, but isnt VHS closer to 200 lines of
>> resolution whereas S-VHS is around 300 or so lines of resolution making the
>> numbers like 200x480, and 300x480?
>
> Those measurements were always somewhat subjective, so you often saw
>a range of about 250 to 300+ for VHS. S-VHS was usually listed in the
>400s range and though I never worked with BetaCam, I believe they
>claimed 500 or greater.

I just checked my copy of "Magnetic Recording Handbook" by Marvin
Camras and he shows VHS luminance at 270 lines, but chrominance
at 230 lines. I always recalled seeing the VHS lower than that.

I've had that book for a jillion years - and it's relatively rare
and I always find something new in it.

This time I ran across of chart depicting the wave-form output
when MICR characters are read on check.

If you want to know anything about magnetic recording, from
forumulas [basic ones] to storage, through head design, etc., I
highly recommend this book.

It will probably only be found in libraries, as I've never found it
used, and a search showed copies at 6 major Universities here in
the state of Florida. It cost me about $85 in the late 1980s.

Bill

--
Bill Vermillion - bv @ wjv . com

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