S-VHS and noises

[ldkha1979]

Hi all,
I'm looking for documents and materials about S-VHS standard. I'm also looking for what kinds of noises with S-VHS and VHS. Is there anyone ever heard about "worm-noise" on S-VHS? So if you have anything about what I'm looking for, pls help me! I appreciate any help from all of you!
Waiting from you and thank you for reading my thread!
Kha
P.s: do you know any link where I can find S-VHS standard in detail (not in general)? Thks so much!

[Morbo]

Google and see what that turns up....

As far as I know,SVHS just layed the Y/C down on seperate tracks
for better seperation(hence the svhs connector).

I think SVHS suffers the same noise as Laserdiscs,try that as well.

Cheers!

[ldkha1979]

thks for your help! I've already tried with google, but got nothing! :-(. Now i will try with laserdisc, as your advice!
Thks a lot!

[FlimsyFeet]

Laserdisc is different to SVHS because the video is stored as composite, not Y/C. Laserdiscs have a similar resolution to SVHS but a slightly better signal-to-noise ratio.

http://laserdiscs.discdude.net/faq.htm

Format----Horizontal Resolution-Signal to noise ratio
VHS.......230-240...............mid to high 40's
S-VHS.....400-420...............mid to high 40's
Laserdisc.430...................low to mid 50's
DVD.......540...................high 60's/ low 70's

[Morbo]

http://graphics.csail.mit.edu/~tbuehler/video/formats.html

S-VHS (Super-VHS): A marked improvement over regular VHS, S-VHS achieves this quality improvement by recording the luminance and chrominance separately and using 400 lines of resolution. Compared to other formats, S-VHS is still rather low quality, yet it is used rather widely by low-level professionals such as public access or event videography. Note that while S-VHS decks can play regular VHS tapes, regular VHS VCRs cannot play S-VHS tapes.
http://www.moesrealm.com/hometheater/laserdisc-guide.html
Laserdisc is a very old format as we learned in the history section. It is a composite video format, where as DVD is a component video format. Many Laserdisc players come with S-video output, but for most of these players their composite video outputs are better.
Laserdiscs are composite,you had it backwards.

Cheers!

[scharfis_brain]

both, VHS and S-VHS are storing the chroma & luma separately.

[FlimsyFeet]

Originally posted by Morbo
Laserdiscs are composite,you had it backwards.

Cheers! That's what I meant to say - you just read it backwards! (My bad - I didn't write the post very well) :D

[gavo]

If I was to resize what resoultion would u suggset from a s-vhs input? Also is s-vhs square pixals or recentagle like dv.

[jggimi]

Analog video doesn't have pixels. See the Capture Guide.

:readguid:

[Wilbert]

... and start by looking up what capture chip/driver you use. Check whether it is listed in the table in section 5.4.