OT: VHS

  • Thread starter Dave Plowman (News)
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Dave Plowman (News)

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Bit of a discussion going on in another group about what this stands for.
Wiki has it as 'Home Video System'.

http://en.wikipedia.org/wiki/VHS

What do the old codgers here - who were around when it was introduced -
think it means?

--
*Stable Relationships Are For Horses. *

Dave Plowman dave@davenoise.co.uk London SW
To e-mail, change noise into sound.
 
Dave Plowman (News) <dave@davenoise.co.uk> wrote in message
news:508f510c48dave@davenoise.co.uk...
Bit of a discussion going on in another group about what this stands for.
Wiki has it as 'Home Video System'.

http://en.wikipedia.org/wiki/VHS

What do the old codgers here - who were around when it was introduced -
think it means?

--
*Stable Relationships Are For Horses. *

Dave Plowman dave@davenoise.co.uk London SW
To e-mail, change noise into sound.
Click to expand...

Well the HS is for helical scan

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/
 
JVC said it stood for "video home system".

While we're at it... Beta has nothing to do with the Greek letter (though
Sony used the letter as a logo). It comes from a Japanese word meaning
"surface coverage". Beta was the first helical-scan system without
guardbands -- the entire surface of the video-recording area was used.
Hence... "Betamax".
 
"N_Cook" <diverse@tcp.co.uk> wrote in message
news:h6rc2n$n0v$1@news.eternal-september.org...
Dave Plowman (News) <dave@davenoise.co.uk> wrote in message
news:508f510c48dave@davenoise.co.uk...
Bit of a discussion going on in another group about what this stands for.
Wiki has it as 'Home Video System'.

http://en.wikipedia.org/wiki/VHS

What do the old codgers here - who were around when it was introduced -
think it means?

--
*Stable Relationships Are For Horses. *

Dave Plowman dave@davenoise.co.uk London SW
To e-mail, change noise into sound.


Well the HS is for helical scan

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/
Click to expand...

Video Home System.

Mark Z.
 
On Sun, 23 Aug 2009 13:12:51 +0100, "Dave Plowman (News)"
<dave@davenoise.co.uk> wrote:

Bit of a discussion going on in another group about what this stands for.
Wiki has it as 'Home Video System'.

http://en.wikipedia.org/wiki/VHS

What do the old codgers here - who were around when it was introduced -
think it means?
Click to expand...
Very High Standards
Video Hate Society
Victors Hair String
Very High Seas
Visibly Horrible System
Virtue's Horrid Surprise
Video High Security
Very High Speed (rewind)
Very Hidden Specification
Very Historical Scrap
Very Heavy Silence
Very Hard Selection
Victors House Sale
Victors Hot Sale
Visibly High Stuff
Vast and Huge Smile
Verrrry Happy Season
Very Human Sound
Very Horrible Solution
etc...

--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558
 
Dave Plowman (News) wrote:
Bit of a discussion going on in another group about what this stands for.
Wiki has it as 'Home Video System'.

http://en.wikipedia.org/wiki/VHS

What do the old codgers here - who were around when it was introduced -
think it means?

Video Helical Scan
Click to expand...

Marketing picked up and called it Video Home System, but it was a video
recorder / player that used helical scanning. Beta did as well, the main
difference being the simpler (cheaper to build) tape path of VHS vs the
longer scan track (slightly higher video quality) available with the
Beta system.

Interestingly, many commercial and broadcast recorders went with a
reverse-image of the Beta system, called U-Matic, which was developed
before either Beta or VHS, and which is still in use.
 
Dave Plowman (News) wrote:
Bit of a discussion going on in another group about what this stands for.
Wiki has it as 'Home Video System'.

http://en.wikipedia.org/wiki/VHS

What do the old codgers here - who were around when it was introduced -
think it means?
Click to expand...
I'm not an old codger but I understood it was 'Video Homes System'.
Could be a translation thing the extra 'S'

Of course VHS was 'invented' by JVC after they stole a peek at Sony's
Betamax system. And JVC allegedly stands for Japanese Vacuum Cleaner ...

--
Adrian C
 
On Mon, 24 Aug 2009 01:10:54 +0100, Adrian C <email@here.invalid>
wrote:

Dave Plowman (News) wrote:
Bit of a discussion going on in another group about what this stands for.
Wiki has it as 'Home Video System'.

http://en.wikipedia.org/wiki/VHS

What do the old codgers here - who were around when it was introduced -
think it means?


I'm not an old codger but I understood it was 'Video Homes System'.
Could be a translation thing the extra 'S'

Of course VHS was 'invented' by JVC after they stole a peek at Sony's
Betamax system. And JVC allegedly stands for Japanese Vacuum Cleaner ...
Click to expand...

Japanese Victor Company. They were given access to RCA Victor's home
electronics designs after WWII. Chuck
 
On Mon, 24 Aug 2009 01:10:54 +0100, Adrian C <email@here.invalid>
wrote:

Of course VHS was 'invented' by JVC after they stole a peek at Sony's
Betamax system. And JVC allegedly stands for Japanese Vacuum Cleaner ...
Click to expand...
JVC was originally "The Victor Talking Machine Company of Japan
Limited" a subsidiary of the Victor Talking Machine Company. It soon
merged with RCA becoming "RCA Victor". JVC pulled the plug,
literally, during WWII, where it was deemed unfashionable to trade
with Japan. JVC is currently part of JVC Kenwood Holdings Limited.
None of the companies mention made or makes vacuum cleaners, but
certainly have made other products that suck.

--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558
 
Chuck <ch@dejanews.net> wrote in message
news:4tn395lnlc7q23k5jrr74s7ce75quv9737@4ax.com...
On Mon, 24 Aug 2009 01:10:54 +0100, Adrian C <email@here.invalid
wrote:

Dave Plowman (News) wrote:
Bit of a discussion going on in another group about what this stands
for.
Wiki has it as 'Home Video System'.

http://en.wikipedia.org/wiki/VHS

What do the old codgers here - who were around when it was introduced -
think it means?


I'm not an old codger but I understood it was 'Video Homes System'.
Could be a translation thing the extra 'S'

Of course VHS was 'invented' by JVC after they stole a peek at Sony's
Betamax system. And JVC allegedly stands for Japanese Vacuum Cleaner ...


Japanese Victor Company. They were given access to RCA Victor's home
electronics designs after WWII. Chuck
Click to expand...
So Victor Helical Scan is a logical acronym. I was always wary of "vertical"
of VHS , the helical scan bit was fine, but vertical implies there was a
(non existant? ) horizontal scanning system somewhere, to differentiate
from.


--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/
 
Geoffrey S. Mendelson <gsm@mendelson.com> wrote in message
news:slrnh94h4j.aj9.gsm@cable.mendelson.com...
N_Cook wrote:
So Victor Helical Scan is a logical acronym. I was always wary of
"vertical"
of VHS , the helical scan bit was fine, but vertical implies there was a
(non existant? ) horizontal scanning system somewhere, to differentiate
from.

Tape is horizontal scaning. VHS is not vertical anyway, it scans at an
angle.

Audio tape needs to be one long continuous track. Video is separated
into fields one with the even lines of a frame followed by one of the
odd lines. The first video tape recorders used wide tape at high speed
to get the bandwidth needed with horizontal scanning.

Helical scan video recorders work by scanning moving the heads at an angle
across the tape in a circle so that they are in contact with the tape
during
the time there is meaningful information (scan lines) to be read or
written.

The original system had 4 tracks, a luminace (white level), chroma (color
information) a sync and control track and an audio track. Later recorders
had stereo (2) audio tracks.

If you were to pour tape developer (remember that?) on a BETA/VHS tape
you would see stripes at an angle across the tape. You would also see
the linear tracks.

The audio tracks were low bandwidth (around 8kHz) so they were linear
(horizontally scanned). Later Sony came out with Beta-HiFi which encoded
audio as an FM subcarier on the video. VHS later came out with a similar
system.

Geoff.

--
Geoffrey S. Mendelson, Jerusalem, Israel gsm@mendelson.com N3OWJ/4X1GM
Click to expand...

But was there ever a rotational helical scan system with the axis of
rotation of the drum being horizontal and the tape horizontal ? , in normal
mode of positioning of the whole chassis that is .



--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/
 
N_Cook wrote:
So Victor Helical Scan is a logical acronym. I was always wary of "vertical"
of VHS , the helical scan bit was fine, but vertical implies there was a
(non existant? ) horizontal scanning system somewhere, to differentiate
from.
Click to expand...
Tape is horizontal scaning. VHS is not vertical anyway, it scans at an angle.

Audio tape needs to be one long continuous track. Video is separated
into fields one with the even lines of a frame followed by one of the
odd lines. The first video tape recorders used wide tape at high speed
to get the bandwidth needed with horizontal scanning.

Helical scan video recorders work by scanning moving the heads at an angle
across the tape in a circle so that they are in contact with the tape during
the time there is meaningful information (scan lines) to be read or written.

The original system had 4 tracks, a luminace (white level), chroma (color
information) a sync and control track and an audio track. Later recorders
had stereo (2) audio tracks.

If you were to pour tape developer (remember that?) on a BETA/VHS tape
you would see stripes at an angle across the tape. You would also see
the linear tracks.

The audio tracks were low bandwidth (around 8kHz) so they were linear
(horizontally scanned). Later Sony came out with Beta-HiFi which encoded
audio as an FM subcarier on the video. VHS later came out with a similar
system.

Geoff.

--
Geoffrey S. Mendelson, Jerusalem, Israel gsm@mendelson.com N3OWJ/4X1GM
 
I'm not an old codger but I understood it was 'Video Homes System'.
Could be a translation thing the extra 'S'.
Click to expand...
Why a plural?


Of course VHS was 'invented' by JVC after they stole a peek at Sony's
Betamax system.
Click to expand...
Not really. There was at least one helical-scan consumer VCR before Betamax.
(U-matic was not a consumer system.) People forget that Betamax wasn't the
first consumer VCR, it was the first successful consumer VCR.


And JVC allegedly stands for Japanese Vacuum Cleaner...
Click to expand...
Good joke, but it's Japan Victor Corporation.
 
In article <h6temo$n2o$1@news.eternal-september.org>,
N_Cook <diverse@tcp.co.uk> wrote:
So Victor Helical Scan is a logical acronym. I was always wary of
"vertical" of VHS , the helical scan bit was fine, but vertical implies
there was a (non existant? ) horizontal scanning system somewhere, to
differentiate from.
Click to expand...
Depends what the reference is. The very first VTRs - pro ones - had the
head drum axis in line to the tape and wrote near vertically across the
tape. Needed four heads on the drum to achieve this. Helical scan uses a
head axis approx at right angles to this or the tape. But not sure in any
way this is relevant. ;-)

--
*If we weren't meant to eat animals, why are they made of meat?

Dave Plowman dave@davenoise.co.uk London SW
To e-mail, change noise into sound.
 
The audio tracks were low bandwidth (around 8kHz) so they were
linear (horizontally scanned). Later Sony came out with Beta-HiFi
which encoded audio as an FM subcarier on the video. VHS later
came out with a similar system.
Click to expand...
Why is it that there is never any such thing as a "carrier", only
"subcarriers"? There's no such thing as a woofer, just subwoofers?

I'm going to stop griping at this point, because I don't remember the exact
configuration of Beta HiFi. Regardless, VHS HiFi is not all that similar to
Beta HiFi.
 
But was there ever a rotational helical scan system with the axis
of rotation of the drum being horizontal and the tape horizontal?
Click to expand...
Such a system would be impossible, because a horizontally rotating drum
would not create a "stripe" pattern on the tape. It would simply scan the
same area over and over again. The drum has to be tilted.

The original Ampex video recorder had the heads moving vertically across the
tape.
 
But was there ever a rotational helical scan system with the axis
of rotation of the drum being horizontal and the tape horizontal?

http://en.wikipedia.org/wiki/Quadruplex_videotape
Click to expand...
This isn't considered helical scanning.
 
In article
<458d1290-8f75-4972-9f38-6b40993aeaaf@c2g2000yqi.googlegroups.com>,
b <reverend_rogers@yahoo.com> wrote:
On 23 ago, 14:12, "Dave Plowman (News)" <d...@davenoise.co.uk> wrote:
Bit of a discussion going on in another group about what this stands
for. Wiki has it as 'Home Video System'.

video home system,.
to have called it video helical scan or whatever would be sort of
cheating, since ALL contemporary video systems used helical scan!
Click to expand...
Depends when development started?

But my mistake above says inadvertently what I feel. Why name a new system
so awkwardly - Video Home System - when Home Video System is how most
would say it? Unless it were a translation from the Japanese.

--
*I'll try being nicer if you'll try being smarter

Dave Plowman dave@davenoise.co.uk London SW
To e-mail, change noise into sound.
 
On 23 ago, 14:12, "Dave Plowman (News)" <d...@davenoise.co.uk> wrote:
Bit of a discussion going on in another group about what this stands for.
Wiki has it as 'Home Video System'.
Click to expand...
video home system,.
to have called it video helical scan or whatever would be sort of
cheating, since ALL contemporary video systems used helical scan!
-B
 
N_Cook wrote:
But was there ever a rotational helical scan system with the axis of
rotation of the drum being horizontal and the tape horizontal ? , in normal
mode of positioning of the whole chassis that is .
Click to expand...
http://en.wikipedia.org/wiki/Quadruplex_videotape

Geoff.


--
Geoffrey S. Mendelson, Jerusalem, Israel gsm@mendelson.com N3OWJ/4X1GM
 
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