 |
 |
CD uses a cross-interleaved Reed-Solomon code at the frame level of all discs. DVD does not, but instead uses a Reed-Solomon product code, as does the sector level of CD-ROM discs. Jerry Media Sciences, Inc. > -----Original Message----- > From: Association for Recorded Sound Discussion List > [mailto:[log in to unmask]] On Behalf Of Steven Smolian > Sent: Saturday, March 25, 2006 9:49 PM > To: [log in to unmask] > Subject: Re: [ARSCLIST] Further thoughts on the new CLIR report. DVDs > > Mike, et al, > > Is there a reasonable amount of interleaving as on CDs? > > Steve Smolian > > ----- Original Message ----- > From: "Mike Richter" <[log in to unmask]> > To: <[log in to unmask]> > Sent: Saturday, March 25, 2006 9:38 PM > Subject: Re: [ARSCLIST] Further thoughts on the new CLIR report. DVDs > > > > steven c wrote: > > > >> Question for the technically knowledgeable... > >> > >> Since CD's and DVD's are (AFAIK) more or less the "same animal" and > >> operate by pressing (or "burning") pits into the surface of a plastic > >> disc, why should there be any difference in the lifespan of the two? > >> > >> Do the littler "holes" fill themselves up more rapidly? > > > > The materials are different, though similar. In particular, the dyes > > proved for recordable CDs are not usable for DVD. > > > > The data density is higher on DVD than on CD. As a result, apart from > > ECC it takes less damage to lose information from a DVD than from a CD. > > > > I believer there are also additional failure modes for DVD, notably > > those associated with dual layers. > > > > Mike > > -- > > [log in to unmask] > > http://www.mrichter.com/ > > > > > > -- > > No virus found in this incoming message. > > Checked by AVG Free Edition. > > Version: 7.1.385 / Virus Database: 268.3.1/291 - Release Date: 3/24/2006 > > > >