New CD Format..... Was on TV Today

[Oldus Fartus]

On 5/09/2003 8:29 PM, Tony Pearce wrote:

"amstereo - matt2" <amstereo@optusINTERnetDOT.comDOT.auSTRALIA> wrote in
message news:3f574dcf$0$10360$afc38c87@news.optusnet.com.au...

not exactly 'compact' though, shit, if ur goin to all the trouble, bring

on

the 8CPS (or higher) reel-to-reel


What exactly is 8CPS?

TonyP.

I am guessing he may have been referring to speed (centimetres per
second), with possibly a typo.
Common speeds were 30 ips, 15 ips, 7 1/2 ips, 3 3/4 ips (ips = inches
per second.)
Metric equivalents were 76 cm/s, 38 cm/s, 19 cm/s, 9.5 cm/s

--
Cheers
Oldus Fartus

 

[SG1]

A vinyl has only 1 (one) groove remember in a spiral. A Cd has only 1 track
also a spiral, so please use singular tense.

John Tserkezis <jt@techniciansyndrome.org.invalid> wrote in message
news:3f587804$0$4192$afc38c87@news.optusnet.com.au...

dmmilne@ozemail.com.au wrote:

CDs already have grooves. They're filled with a fine layer of
aluminium and
forms part of the reflective layer.

CD's don't have grooves. They have pits.

A line of these pits, as far as the dynamics of reading CDs go, are in a
manner of speaking, grooves. The laser follows the sequence of pits much
like
a needle in a traditional vinyl record would. Kinda.

--
Linux Registered User # 302622
http://counter.li.org

 

[budgie]

On Fri, 05 Sep 2003 22:57:36 GMT, "SG1" <lost@the.park> wrote:

A vinyl has only 1 (one) groove remember in a spiral.

Actually, all but one of mine have two.

A Cd has only 1 track
also a spiral, so please use singular tense.

John Tserkezis <jt@techniciansyndrome.org.invalid> wrote in message
news:3f587804$0$4192$afc38c87@news.optusnet.com.au...
dmmilne@ozemail.com.au wrote:

CDs already have grooves. They're filled with a fine layer of
aluminium and
forms part of the reflective layer.

CD's don't have grooves. They have pits.

A line of these pits, as far as the dynamics of reading CDs go, are in a
manner of speaking, grooves. The laser follows the sequence of pits much
like
a needle in a traditional vinyl record would. Kinda.

--
Linux Registered User # 302622
http://counter.li.org

 

[Oldus Fartus]

On 6/09/2003 11:04 AM, budgie wrote:

On Fri, 05 Sep 2003 22:57:36 GMT, "SG1" <lost@the.park> wrote:


A vinyl has only 1 (one) groove remember in a spiral.


Actually, all but one of mine have two.

Well yes, one groove on each side.

--
Cheers
Oldus Fartus

 

[KLR]

On Fri, 05 Sep 2003 22:57:36 GMT, "SG1" <lost@the.park> wrote:

A vinyl has only 1 (one) groove remember in a spiral. A Cd has only 1 track
also a spiral, so please use singular tense.

are you sure ? I thought that CD's had their pits arranged in
concentric circles

John Tserkezis <jt@techniciansyndrome.org.invalid> wrote in message
news:3f587804$0$4192$afc38c87@news.optusnet.com.au...
dmmilne@ozemail.com.au wrote:

CDs already have grooves. They're filled with a fine layer of
aluminium and
forms part of the reflective layer.

CD's don't have grooves. They have pits.

A line of these pits, as far as the dynamics of reading CDs go, are in a
manner of speaking, grooves. The laser follows the sequence of pits much
like
a needle in a traditional vinyl record would. Kinda.

--
Linux Registered User # 302622
http://counter.li.org

 

[John Leister]

KLR wrote:

On Fri, 05 Sep 2003 22:57:36 GMT, "SG1" <lost@the.park> wrote:

A vinyl has only 1 (one) groove remember in a spiral. A Cd has only 1 track
also a spiral, so please use singular tense.


are you sure ? I thought that CD's had their pits arranged in
concentric circles

No..... Cds have a concentric spiral.

They also spin from the center outwards.

They also spin faster when the laser is near the
center of the disk to when it's near the outer edge

 

[Rod Speed]

"John Leister" <fyrdemon@senet.com.au> wrote in message news:3F59831E.5479AC96@senet.com.au...

KLR wrote:

On Fri, 05 Sep 2003 22:57:36 GMT, "SG1" <lost@the.park> wrote:

A vinyl has only 1 (one) groove remember in a spiral. A Cd has only 1 track
also a spiral, so please use singular tense.


are you sure ? I thought that CD's had their pits arranged in
concentric circles



No..... Cds have a concentric spiral.

Not possible to be both.

They also spin from the center outwards.

Thats not possible either. It might well scan from the center outwards.

They also spin faster when the laser is near the
center of the disk to when it's near the outer edge

A likely story.

 

Rod Speed wrote:

"John Leister" <fyrdemon@senet.com.au> wrote in message news:3F59831E.5479AC96@senet.com.au...
KLR wrote:

On Fri, 05 Sep 2003 22:57:36 GMT, "SG1" <lost@the.park> wrote:

A vinyl has only 1 (one) groove remember in a spiral. A Cd has only 1 track
also a spiral, so please use singular tense.


are you sure ? I thought that CD's had their pits arranged in
concentric circles



No..... Cds have a concentric spiral.

Not possible to be both.

They also spin from the center outwards.

Thats not possible either. It might well scan from the center outwards.

They also spin faster when the laser is near the
center of the disk to when it's near the outer edge

A likely story.

Check out the document ECMA-130, page 7, section 11 for the Physical Track Geometry.
I understand it's the Yellow Book standard which relates to CD-ROMs, which are physically
the same as audio CDs anyway. The Red Book standard costs about US$100, and you have to sign a NDA.

--

David

 

[Nick Andrew]

John Leister <fyrdemon@senet.com.au> writes:

They also spin faster when the laser is near the
center of the disk to when it's near the outer edge

They used to, but nowadays it is cheaper to make one with
constant angular velocity and adjust the timebase for the
difference in bitrate between the center and edge.

Nick.
--
http://www.nick-andrew.net/ http://aus.news-admin.org/
Do not send me email copies of postings. Keep it in USENET please.

 

[KLR]

On Sat, 6 Sep 2003 19:40:50 +1000, "Rod Speed" <rod_speed@yahoo.com>
wrote:

"John Leister" <fyrdemon@senet.com.au> wrote in message news:3F59831E.5479AC96@senet.com.au...
KLR wrote:

On Fri, 05 Sep 2003 22:57:36 GMT, "SG1" <lost@the.park> wrote:

A vinyl has only 1 (one) groove remember in a spiral. A Cd has only 1 track
also a spiral, so please use singular tense.


are you sure ? I thought that CD's had their pits arranged in
concentric circles



No..... Cds have a concentric spiral.

Not possible to be both.

They also spin from the center outwards.

Thats not possible either. It might well scan from the center outwards.

They do scan from the centre outwards. spin - no

They also spin faster when the laser is near the
center of the disk to when it's near the outer edge

that is true. they slow down enormously when playing the outer track

compared to the inner track (on an audio CD - probably other types as
well I would imagine)

A likely story.

 

[Oldus Fartus]

On 7/09/2003 11:41 AM, KLR wrote:

On Sat, 6 Sep 2003 19:40:50 +1000, "Rod Speed" <rod_speed@yahoo.com
wrote:


"John Leister" <fyrdemon@senet.com.au> wrote in message news:3F59831E.5479AC96@senet.com.au...

KLR wrote:


On Fri, 05 Sep 2003 22:57:36 GMT, "SG1" <lost@the.park> wrote:


A vinyl has only 1 (one) groove remember in a spiral. A Cd has only 1 track
also a spiral, so please use singular tense.


are you sure ? I thought that CD's had their pits arranged in
concentric circles



No..... Cds have a concentric spiral.

Not possible to be both.


They also spin from the center outwards.

Thats not possible either. It might well scan from the center outwards.


They do scan from the centre outwards. spin - no


They also spin faster when the laser is near the
center of the disk to when it's near the outer edge

that is true. they slow down enormously when playing the outer track
compared to the inner track (on an audio CD - probably other types as
well I would imagine)



A likely story.



Yes - No - Maybe! It depends on whether the drive is using CLV or CAV,

and the type of disc.

In the case of an audio cd, given that the pits and bumps are equally
spaced over the whole surface the amount of data read by the laser in
(say) one revolution is less at the centre than at the outer edge of the
disc. To keep a constant flow of data at the correct rate, the drive
must slow down as the laser moves toward the outer edge of the disc.
The alternative is to use some sort of buffer.

A good explanation is at http://knowhow.cdfreaks.com/article.php?ID=123

--
Cheers
Oldus Fartus

 

[Rod Speed]

<dmmilne@ozemail.com.au> wrote in message news:3F5A8263.A3F0FF4F@ozemail.com.au...

Rod Speed wrote:

"John Leister" <fyrdemon@senet.com.au> wrote in message news:3F59831E.5479AC96@senet.com.au...
KLR wrote:

On Fri, 05 Sep 2003 22:57:36 GMT, "SG1" <lost@the.park> wrote:

A vinyl has only 1 (one) groove remember in a spiral. A Cd has only 1 track
also a spiral, so please use singular tense.


are you sure ? I thought that CD's had their pits arranged in
concentric circles



No..... Cds have a concentric spiral.

Not possible to be both.

They also spin from the center outwards.

Thats not possible either. It might well scan from the center outwards.

They also spin faster when the laser is near the
center of the disk to when it's near the outer edge

A likely story.

Check out the document ECMA-130, page 7,
section 11 for the Physical Track Geometry.

Dont need to thanks. That was one of those funky things called a joke, Joyce.

I understand it's the Yellow Book standard which relates to CD-ROMs,
which are physically the same as audio CDs anyway. The Red Book
standard costs about US$100, and you have to sign a NDA.

Bullshit you do.

 

[William J. Wolfe]

John Leister <fyrdemon@senet.com.au> wrote in message news:<3F56FA88.D790C802@senet.com.au>...

It would seem on face value that the recording
industry is feeling the pinch of people with burners.

I saw a news story at work today on a new type of CD
recorded with grooves that is supposed to stop you from
making copies ...

You haven't had a real close look at a CD, have you?

Groves in recorded media went out with black vinyl.

I wonder how long till someone makes a burner capable
of reading these hehe?

Easdy to fix, just superglue a pin to the laser in the CD recorder.

 

[John Leister]

"William J. Wolfe" wrote:

John Leister <fyrdemon@senet.com.au> wrote in message news:<3F56FA88.D790C802@senet.com.au>...
It would seem on face value that the recording
industry is feeling the pinch of people with burners.

I saw a news story at work today on a new type of CD
recorded with grooves that is supposed to stop you from
making copies ...

You haven't had a real close look at a CD, have you?
Groves in recorded media went out with black vinyl.

No these CDs had a wavy surface... Supposedly to stop
a burner from copying them.

 

Rod Speed wrote:

dmmilne@ozemail.com.au> wrote in message news:3F5A8263.A3F0FF4F@ozemail.com.au...

I understand it's the Yellow Book standard which relates to CD-ROMs,
which are physically the same as audio CDs anyway. The Red Book
standard costs about US$100, and you have to sign a NDA.

Bullshit you do.

Got a copy? Willing to share it around? Or the weblink?

--

David

 

[Rod Speed]

<dmmilne@ozemail.com.au> wrote in message news:3F5AD3FB.FED24CE1@ozemail.com.au...

Rod Speed wrote:

dmmilne@ozemail.com.au> wrote in message news:3F5A8263.A3F0FF4F@ozemail.com.au...

I understand it's the Yellow Book standard which relates to CD-ROMs,
which are physically the same as audio CDs anyway. The Red Book
standard costs about US$100, and you have to sign a NDA.

Bullshit you do.

Got a copy? Willing to share it around? Or the weblink?

Got sweet fuck all to do with an NDA.

 

[William J. Wolfe]

John Leister <fyrdemon@senet.com.au> wrote in message news:<3F5ACFCD.33C5B241@senet.com.au>...

"William J. Wolfe" wrote:

John Leister <fyrdemon@senet.com.au> wrote in message news:<3F56FA88.D790C802@senet.com.au>...
It would seem on face value that the recording
industry is feeling the pinch of people with burners.

I saw a news story at work today on a new type of CD
recorded with grooves that is supposed to stop you from
making copies ...

You haven't had a real close look at a CD, have you?
Groves in recorded media went out with black vinyl.



No these CDs had a wavy surface... Supposedly to stop
a burner from copying them.

If that was the case, how the fuck could a CD player read to PLAY the
disc? Sounds like a 110% pure wank.

 

[Richard Rudek]

On 8 Sep 2003 00:36:13 -0700, w_j_wolfe@hotmail.com (William J. Wolfe)
wrote:

John Leister <fyrdemon@senet.com.au> wrote in message news:<3F5ACFCD.33C5B241@senet.com.au>...

[snip]

No these CDs had a wavy surface... Supposedly to stop
a burner from copying them.


If that was the case, how the fuck could a CD player read to PLAY the
disc? Sounds like a 110% pure wank.

Depends on upon what is meant by "wavy surface". A CD drive's laser
moves up and down (magnetic suspension), so as to focus the laser spot
on the CD's reflective surface. At hi-speed, it would be extremely
difficult to adjust the focus fast enough, if the surface was "wavy".
However, at low, or 1x playback speed, it should be possible.

So the obvious workaround is to copy at low speeds...
___________________________________________
Richard Rudek. MicroDek, Sydney, Australia.
ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ

 

[Mark van der Eynden]

Richard Rudek <x@invalid.xxx> wrote in message news:<6bcb666527e3a6bfed99ec81257b5a59@news.teranews.com>...

On 8 Sep 2003 00:36:13 -0700, w_j_wolfe@hotmail.com (William J. Wolfe)
wrote:
John Leister <fyrdemon@senet.com.au> wrote in message news:<3F5ACFCD.33C5B241@senet.com.au>...

[snip]

No these CDs had a wavy surface... Supposedly to stop
a burner from copying them.


If that was the case, how the fuck could a CD player read to PLAY the
disc? Sounds like a 110% pure wank.

Depends on upon what is meant by "wavy surface". A CD drive's laser
moves up and down (magnetic suspension), so as to focus the laser spot
on the CD's reflective surface. At hi-speed, it would be extremely
difficult to adjust the focus fast enough, if the surface was "wavy".
However, at low, or 1x playback speed, it should be possible.

So the obvious workaround is to copy at low speeds...
___________________________________________
Richard Rudek. MicroDek, Sydney, Australia.
ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ

Oh, great, if they do that I reckon the positioner on my CD player
will wear out at about 1000 times the rate it currently does, not to
mention the extra fatigue on the connection wires. Acutally I doubt
the positioner is rated for the duty cycle such a technique would
create.

I wonder if the record companies will be prepared to replace my player
1000 times (before it's real 'end of life')

Mark