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Sony Blu-spec CD Format Detailed, Hits Stores
CNETNate writes "More details about Sony's new Blu-spec CD format — standard CDs authored using Blu-ray's blue diode technology — are beginning to emerge, with commercial releases beginning to hit Amazon. Blu-spec CDs are compatible with existing CD players but have been mastered with higher levels of accuracy by using the same technology used to author Blu-ray discs, with the intention of eliminating reading errors that occur as a result of being authored with traditional red laser technology. Sony has also launched an official (Japanese) site for Blu-spec CDs."
If you RTFA, you'll notice the bottom half of it is titled:
Why this is all marketing nonsense
Funny how the summary left out that part.
$x='S24;r)>63/* h@<5+oZ)32"5cz';$me='phroggy'x$];
$x=~y+ -xz+\0-Tx+;print$_^chop$me for split'',$x;
Read the summary again. This isn't blu-ray, it's just using a blue laser to regular burn CDs instead of a red one.
It's solving a problem nobody has.
It's been a long time.
Yes, commercial CDs are pressed from masters... this is a supposedly more accurate way of creating the masters.
I've abandoned my search for truth; now I'm just looking for some useful delusions.
The final polycarbonate disc is pressed. The glass master, however, is etched with a laser. The summary's still incorrect, though, as the master's created using a UV or violet laser.
TFA could be referring to the fact that red lasers are used to check the master for consistency.
This message printed on 100% post-consumer recycled electrons.
There are no foolproof methods; but there are a variety of techniques that have been tried, with more pain to the legitimate than to the pirates, as usual.
.
There are two basic schools of design for Audio CD DRM: The one is to include, in a location that won't interfere with the audio tracks, a data track, and put some sort of nastiness in it, set to autoplay on insertion. This is
The other main method is to exploit differences between the Red Book standard(audio CDs) and the Yellow Book standard(CDROM drives) and introduce deliberate errors into your CD that will be negligible under redbook but problematic under yellow book. Because this is a hack, there are no really good ways to do it(and, it causes real issues with some newer stereos that use CDROM drives); but that is how it is tried.
This isn't actually a new "physical media format". It's just a CD made with a blue laser instead of a red laser. They're still readable by any old CD player; the only difference is that they supposedly have a lower error rate.
My sig can beat up your sig.
Instead of that bullcr**, they could just stop reducing the dynamic range of our music and give us back the sound our CDs were supposed to produce...
See : http://en.wikipedia.org/wiki/Loudness_war
CDs aren't created directly with lasers. The pit-land pattern is etched into a glass master, from which the stamps are produced which are used to press the polycarbonate discs that end up in our CD-players. The step which involves a laser is the activation of the photochemical surface of the glas master. Where the photochemical surface is washed away, the etching process creates the pits. I think it's a stretch to think that switching to a blue laser can provide a noticeable benefit in that process.
That's the point of an audio CD.
No.
Why post shit like that when you have no idea?
http://en.wikipedia.org/wiki/Red_Book_(audio_CD_standard) Audio-CD
http://en.wikipedia.org/wiki/Yellow_Book_(CD_standard) CD-ROM
http://en.wikipedia.org/wiki/CD-R#History Orange book (CD-R)
The whole bunch:
http://en.wikipedia.org/wiki/Rainbow_Books
Red:
"On the disc, the data is stored in sectors of 2352 bytes each, read at 75 sectors per second. Onto this the overhead of EFM, CIRC, L2 ECC, and so on, is added, but these are not typically exposed to the application reading the disc."
http://en.wikipedia.org/wiki/CD-ROM#CD-ROM_format
"In order to achieve improved error correction and detection, a CD-ROM has a third layer of Reed-Solomon error correction.[2] A Mode-1 CD-ROM, which has the full three layers of error correction data, contains a net 2048 bytes of the available 2352 per sector. In a Mode-2 CD-ROM, which is mostly used for video files, there are 2336 user-available bytes per sector."
So less bytes / sector for data = more for error correction.