Turning cd-r discs into dvd-r discs?

[Wadded Beef]

How can you turn cd-r discs into dvd-r discs?

In other words recording 4.7gb of data onto a regular cd-r, no compression or anything, just tricking the drive into thinking the disc is a writable dvd disc.

I heard there's a way, what's the trick? Thanks!

 

[CycloWizard]

The easiest way is to con someone at Best Buy into thinking you actually paid for DVD-Rs when returning CD-Rs.

 

[Calin]

The prices for DVD discs are almost as low as the prices for CD discs (one and a half to two times). Save the troubles and buy directly DVD discs

 

[bsobel]

Originally posted by: Wadded Beef
How can you turn cd-r discs into dvd-r discs?

In other words recording 4.7gb of data onto a regular cd-r, no compression or anything, just tricking the drive into thinking the disc is a writable dvd disc.

I heard there's a way, what's the trick? Thanks!

This is Highly Technical, not Urban Legends..

 

[yukichigai]

The closest I've heard of is HD-Burn, a proprietary format developed by Sanyo, initially only offered on Optorite drives. Optorite, if you remember, made some of the first Dual-format DVD burners. Their inital offering -- the DD0201 -- also came with HD-Burn support.

HD-Burn allows you to burn twice as much data onto a CD-r, 1400mb of data on one CD. (Mode 2/XA isn't offered, so you can't make an "HD-(S)VCD" and get 1600mb of data on) I'm unsure of how the tech works exactly, (Involves lowering the bitpath width) but I do know that it requires high-end CD-r media. Taiyo Uden, Ricoh/Ritek and FujiFilm are the recommended brands. (Fujis are on sale every so often at BB, CC, etc.) Low-end generic brands have never worked for me.

The only problem is that Optorite doesn't produce the best drives. The DD0203 has calibration issues, and often turns minor disc imperfections into huge glaring discolorations, at least on DVDs. Not many other manufacturers support the format, though supposedly only a minor firmware modification is required to allow DVD drives to read the media. Optorite is still churning out drives that support HD-Burn, so it's still possible it'll be supported by DVD players in the future. At the moment though it's mostly a specialized market. It could go the way of LaserDiscs, or the way of DVDs.

 

[Wadded Beef]

I just need to find out because it's extra credit for a computer class. yes, there is a way. no, it doesn't involve compression or conning your local BB...

 

[yukichigai]

Originally posted by: Wadded Beef
I just need to find out because it's extra credit for a computer class. yes, there is a way. no, it doesn't involve compression or conning your local BB...

Are you sure your computer teacher isn't an idiot?

If not, the only thing I can think of would be to take the HD-Burn tech to a higher level, i.e. lower the minimum pit length to 0.4 micrometers by some method. (This page from a DVD-drive review has a good explanation of the HD-Burn tech) Of course your error correction would go out the window, but it does when you burn in Mode 2/XA, too.

Good luck overloading a drive to do that though. And finding media that's high enough quality to support it. There's a reason why DVD media is more expensive than CD media.

 

[Mark R]

No. There is no possible way. The discs are physically different. The guide markers on the discs are at different spacings and encoded differently. The dyes are different and respond differently to the different coloured lasers. Indeed, the dyes used in CD-R discs are invisible to DVD reading lasers, so DVD players now have a seperate CD laser, in order to be compatible with CD-Rs. 1st generation DVD players used a single laser in the pickup - this worked fine for pressed CDs and CD-RWs but didn't work for CD-Rs.

It is possible to record DVD video files onto a CD-R. This is sometiems called 'mini-DVD' and such discs will usually be recognised as a DVD by DVD players. However, they do not always play, because the rotation speed of of a CD needs to be much higher than a DVD for the same bit-rate, and many stand-alone DVD players cannot spin the disc sufficiently fast.

 

[Bassyhead]

Originally posted by: Calin
The prices for DVD discs are almost as low as the prices for CD discs (one and a half to two times). Save the troubles and buy directly DVD discs

Seriously, don't be cheap.

 

[Wadded Beef]

Originally posted by: Bassyhead

Originally posted by: Calin
The prices for DVD discs are almost as low as the prices for CD discs (one and a half to two times). Save the troubles and buy directly DVD discs

Seriously, don't be cheap.

i don't even have a dvd burner, its for a class, like i said before...

 

[Changlinn]

Someone already said it can't be done, technically the discs are to different, it is sort of like long play vhs and short play, only the shortplay(cd) uses different chemicals and track widths so more data cannot be fit onto it unless you use a trick like hd-burn and these require high quality chemicals so that the higher density pits and groves can be read/wrote, even then due to the lenght of channel that goes around the disc it can only get 1.4gb... not the 4.5gb of DVD. Do remember lp's, well cd is like a regular LP the tracks are pretty far apart, DVD they are so close together you can't see them and they are thinner too.

 

[jagec]

Originally posted by: Wadded Beef

Originally posted by: Bassyhead

Originally posted by: Calin
The prices for DVD discs are almost as low as the prices for CD discs (one and a half to two times). Save the troubles and buy directly DVD discs

Seriously, don't be cheap.

i don't even have a dvd burner, its for a class, like i said before...

Dude, your prof is on crack.

 

[Calin]

Try to fit 25 persons in your average car. It's the same with DVD versus CD (maybe more, as the usual size for a DVD is 7+ times bigger than that of a CD)

 

[harrkev]

A CD-R has the physical "grooves" pressed into the disc. There is enough groove spacing to fit a CD on there. A DVD-R has much smaller grooves.

With that being said, it is theoretically possible to fit a lot more data on the CD-R. You could decrease the bit size, increase the block size, remove the error correction, etc. But this would create a highly non-standard disc, and is not something that I would want to do.

 

[MobiusPizza]

Lol what sort of computer class is that...
I am curious

It's like fitting in a same number of Malteasers in a fixed jar of Smarties. It's impossible
Also consider the fact that the opening of the jar is designed to fit in smarties only...

 

[DennyD]

Tell your prof. to come here and give us his "proof." If he said it is possible he's either lying or on crack... I'd *love* to read that load of BS hehehehehe

 

[Chubs]

Originally posted by: DennyD
Tell your prof. to come here and give us his "proof." If he said it is possible he's either lying or on crack... I'd *love* to read that load of BS hehehehehe

If you followed the thread you'd know the professor didn't claim it was possible - he simply asked a question designed to get his students to think/research to get extra credit.

 

[nyarrgh]

They have different dyes, are read by/written to by different wavelength lasers and have different structures (pit length, groove width etc.) . You heard wrong.
Although you probably could fit 4.5Gb on a CD by burning the information using an electron microscope level equipment, but that wouldn't really be a DVD, or a CD then would it? Might as well write the information on a piece of paper with that huge electron microscope level equipment you bought.

 

[0roo0roo]

data layers are at different dpeths too i think. dvds are two plastic sheets sandwiching the data layer. cds have it on top right?

 

[Mark R]

data layers are at different dpeths too i think. dvds are two plastic sheets sandwiching the data layer. cds have it on top right?

Yup, that's right. DVD's have the data about 0.6 mm above the bottom surface of the disc. With CDs it's about 1.1 mm. However, the optics should be able to cope with both (otherwise the drive wouldn't be able to play CDs).

There are other differences too - DVDs are much stronger and more rigid than CDs (they're designed for higher rotation speeds) although that's not really relevant for the question at hand.

 

[0roo0roo]

yup. bluray has it like .1mm from the bottom. the closer better for packed data.

plus u can tell..njust scratch dvdrs top.. its just plastic. do that to a cd..and oh no.. that and look at the side.

 

[AkumaX]

not unless he's talking about converting dvd-video to divx to fit on a cd

i think lite-on does HD-burn also