Double Density 1.3 GB CD-RW from Sony |
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Although not strictly digital photography news it may well be important to the many people who archive images to CD-R and also bearing in mind Sony's recent releases of the CD200 and CD300 digital cameras which both write directly to CD-R/RW. The new DDCD format agreed by Sony and Philips was announced last July, this new drive is the first which can read/write at the new double density level.
Phil: This is good news for those of you who archive your images to CD-R (assuming the format catches on) and may be interesting news if Sony decide to push this technology into their CD Mavica line, at double density it would provide 300 MB of storage on a single 8 cm CD-R/RW.
Double Density CD vs. Normal CD
| Double Density CD-ROM/R/RW | CD-ROM/R/RW | |
| Data capacity | 1.3 GB (2048 B/sector) | 650 MB (2048 B/sector) |
| Laser wave length | 780 nm | |
| Object lens | Play: NA=0.50 Record/Play: NA=0.55 |
Play: NA=0.45 Record/Play: NA=0.50 |
| Disc size | 12 cm | |
| Track pitch | 1.1 µm | 1.6 µm |
| Minimum pit length | 0.623 µm | 0.833 µm |
| Line speed | 0.90 m/second | 1.2 - 1.4 m/second |
| Error correction | CIRC7 | CIRC |
| Modulation | EFM | |
Sony CRX200E specifications
| Name | Sony CRX200E |
| Interface | ATAPI |
| Recording capacity | 1.3 GB (DD-R/RW) and 650/700 MB (CD-R/RW) |
| Write speed (DD-R/CD-R) | 12 x |
| Write speed (DD-RW/CD-RW) | 8 x |
| Read speed | 32 x (or less) |
| Buffer | 8 MB |
| Access time (average) | 150 ms |
| Read format | DD-ROM (Purple book), CD-ROM, CD-ROM XA, CD-DA, CD Extra, CD-Text, CD, Video CD, Photo CD |
| Write format | Disc at once (CD-R/RW), Session at once (CD-R/RW), Track at once (CD-RW, DD-R/RW), Packet light (CD-RW/RW, DD-R/RW) |
| Expected release date | 13 April 2001 (Japan) |
From:
http://www.dpreview.com/news/0103/01032801sonyddcddrive.asp
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