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Advance Digital CD and DVD Technology Overview

A comprehensive guide to CD and DVD technology, including types like CD-R and DVD-RAM, storage capacities, best practices for usage, and comparisons with older technologies. Learn about writable and rewritable formats, encoding methods, and industry standards. This resource covers popular disc and drive formats, such as Red Book and Yellow Book, for storing digital data and multimedia content.

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Advance Digital CD and DVD Technology Overview

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  1. EET 450 - Advance Digital Chapter 12 CD - CDR - DVD

  2. Compact Disk Technology • Information stored on a reflective surface, read with a laser beam. • 74 minutes or 640 Mb of data storage • Current 80 min/700 Mb • CD-ROM is a read only version. • Data is recorded at manufacture using a printing-style operation

  3. Transfer rates have been increasing • See Table for speeds • A more important measure is access time. • Massive (relatively) mechanism means slow response to move the read head into position to read information.

  4. CD-R - Recordable media • Same storage capacity, but media uses an organic dye • Some makers now featuring 700Mb (80min) • The dye reflectivity is changed with a low power laser. • Storage is a WORM variety

  5. CD-R Media Color • Reflective layer/Die Layer • Gold-gold – Phthalocyanine dye • Less tolerance for power variations • Gold-green – Cyanine dye • More forgiving • 10 yr life span • Silver-blue – Azo dye • Similar to green, but rated to 100 years.

  6. CD-RW - Re-writable CD • Uses a phase-change technology • Same storage capacity as CD • active layer of CD-RW is Ag-In-Sb-Te • Silver - indium - antimony - tellurium • polycrystalline structure is reflective • High power laser heats to 500-700 degrees

  7. This solidifies in a non-reflective state • To erase, a lower power laser heats to 200 degrees, which solidifies in the original reflective state.

  8. CD-ROM Disc & Drive Formats • Red Book • Digital Audio CDs (CDDA) • Yellow Book • Computer CDs • Mode 1: ISO 9660 • Level 1: PC, Apple, UNIX, DVI • Level 2: CDTV

  9. CD-ROM Disc & Drive Formats • White Book • Video CD • MPEG-1, MPEG-2 • Orange Book • Writeable CDs – CDR

  10. Green Book • Combination of Red and Yellow Books • CD-I • CD + (Enhanced CD) • Combines Music and computer Data on 1 CD

  11. Data Standard: ISO 9660 • High Sierra Format • CD-CA (digital Audio) • CD-ROM XA – extended architecture • Multi-session CDs

  12. DVD • Digital Versatile Disk • initial capacity 4.7 G - 135 minutes of video with three audio and four sub-title channels. • 8.5 G dual layer disks - use a semi reflective top layer. • double sided • 9.4G single layer • 17G double layer

  13. Additional capacity from • smaller pit length • reduced track pitch • larger data area on disk • More efficient modulation • More efficient error correction code • less sector overhead

  14. Short wave-length laser reads • fast transfer rate - ~ 9x by CD-Rom standards • interface - standard IDE/ATA or SCSI

  15. Standard DVD Formats

  16. Recordable DVD • Two standards • DVD-R • WORM type • DVD-RAM • re-writable like CD-RW

  17. Recordable DVD Standards • DVD-RAM – 2.6 G/side • Not compatible w/ DVD ROM $25/disk • DVD-R – 4.7G (1999 version) • Almost all can read this format $40/disk • DVD-RW – 4.7G • Almost all can read this format $40/disk • DVD+RW – 2.8G/side • A few current from Sony or Phillips $30/disk

  18. DVD Ram encoding

  19. DVD-Ram

  20. DVD-R Wobbled Groove

  21. DVD-R

  22. MultiRead & MultiRead2

  23. References • http://www.toshiba.com/taecdpd/products/docs/dvdramwhitepaper.shtml • Mueller, S., Upgrading and Maintaining PC’s 12e, 2000, Que Corp.

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