Optical discs

Optical disc Optical disc drive Optical disc authoring Authoring software Recording technologies Recording modes Packet writing
Optical media types
Blu-ray Disc (BD): BD-R, BD-RE DVD: DVD-R, DVD+R, DVD-R DL, DVD+R DL, DVD-RW, DVD+RW, DVD-RW DL, DVD+RW DL, DVD-RW2, DVD-RAM, DVD-D, HVD Compact Disc (CD): Red Book, CD-ROM, CD-R, CD-RW, 5.1 Music Disc, SACD, PhotoCD, CD Video (CDV), Video CD (VCD), SVCD, CD+G, CD-Text, CD-ROM XA, CD-i Universal Media Disc (UMD) Enhanced Versatile Disc (EVD) Forward Versatile Disc (FVD) Holographic Versatile Disc (HVD) China Blue High-definition Disc (CBHD) HD DVD: HD DVD-R, HD DVD-RW, HD DVD-RAM High-Definition Versatile Disc (HDVD) High definition Versatile Multilayer Disc (HD VMD) VCDHD GD-ROM MiniDisc (MD) (Hi-MD) Laserdisc (LD) Video Single Disc (VSD) Ultra Density Optical (UDO) Stacked Volumetric Optical Disk (SVOD) Five dimensional discs (5D DVD) Nintendo optical disc (NOD)
Standards
Rainbow Books File systems ISO 9660 Joliet Rock Ridge / SUSP El Torito Apple ISO 9660 Extensions Universal Disk Format (UDF) Mount Rainier
Further reading
History of optical storage media High definition optical disc format war
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Blu-ray Disc recordable (or BD-R) refers to two optical disc formats that can be recorded with an optical disc recorder. BD-R discs can be written to once, whereas BD-RE can be erased and re-recorded multiple times. Disc capacities are 25 GB (23.31 GiB) for single layer discs and 50 GB (46.61 GiB) for double layer discs.^[1]

As of September 2009^[update], BD-R/RE drives up to 8x are sold for about US$150.^[2] and 2x single-layer BD-R discs with a capacity of 25 GB can be found for US$3-$5.^[3]

Contents 1 Version 1.1 BD-RE Versions 1.2 BD-R Versions 2 Speed 3 BD-R LTH (Low To High) 4 See also 5 References 6 External links

[edit] Version

[edit] BD-RE Versions

There are three versions of Blu-ray Discs Rewritable (BD-RE):^[4]

Version 1.0

• unique BD File System
• not computer compatible

Version 2.0

• UDF 2.5 file system for computer use
• the use of AACS
• BD-R Version 1.0 follows this specification

Version 3.0

• camcorder (8 cm) discs added
• backward compatible with Version 2.0
• BD-R Version 2.0 follows this specification

[edit] BD-R Versions

Version 1.2

• add BD-R Low To High (BD-R LTH) standard.^[5]

[edit] Speed

Drive speed	Data rate			BD-R write time	BD-R DL write time
1X[1]	36 Mbit/s	4.5 MB/s	4.39 MiB/s	~95 min.	~190 min.
2X	72 Mbit/s	9 MB/s	8.78 MiB/s	~47 min.	~94 min.
4X	144 Mbit/s	18 MB/s	17.56 MiB/s	~24 min.	~48 min.
6X	216 Mbit/s	27 MB/s	26.34 MiB/s	~16 min.	~32 min.
8X	288 Mbit/s	36 MB/s	35.12 MiB/s	~12 min.	~24 min.
12X	432 Mbit/s	54 MB/s	52.63 MiB/s	~8 min.	~16 min.

[edit] BD-R LTH (Low To High)

BD-R LTH is a write-once Blu-ray disc format that features an organic dye recording layer. The advantage of BD-R LTH is it can protect a manufacturer's investment in DVD-R/CD-R manufacturing equipment. Only modifications are required to current equipment; no investment in new production lines is required. It is believed this can lower the cost of discs. ^[6]

Old Blu-ray players and recorders can't utilize BD-R LTH, however, a firmware upgrade could enable the device to access BD-R LTH. Panasonic has already released such a firmware update in November 2007 for its DMR-BW200, DMR-BR100 and the MR-BW900/BW800/BW700 models. ^[7] Pioneer is also expected to ship the first LTH BD drives in Spring of 2008^[8]. Furthermore, Sony's PlayStation 3 received firmware upgrade to enable BD-R LTH reading in March, 2008^[9].

[edit] See also

• Optical Disc Authoring
• Optical Disc

[edit] References

[edit] External links

v • d • e High definition media Media formats Blu-ray Disc  · HD DVD  · China Blue High-Definition (CBHD)  · Holographic Versatile Disc  · UMD Promoter Blu-ray Disc Association · HD DVD Promotion Group  · HVD Forum  · Sony(UMD)  · China High-definition DVD Industry Association Interactivity BD-Java · Advanced Content Recordable formats BD-R · BD-RE · HD DVD-R · HD DVD-RW · HD DVD-RAM Comparison Comparison of high definition optical disc formats copy prevention AACS (BD, FVD, and HD DVD) · HDCP (BD and HD DVD) · BD+ (BD) · ROM-Mark (BD) Blu-ray Disc players PlayStation 3 · Sony BDP-S1 · Panasonic DMP-BD10 HD DVD players Xbox 360 HD DVD Drive · Toshiba HD-A1 · Toshiba HD-XA1