CH DVD

Media type	High-density optical disc
Developed by	DVD Forum, Optical Memory National Engineering Research Center (OMNERC)
Usage	Data storage, including high-definition video

China Blue High-Definition (CBHD) (Chinese: 中国蓝光高清光盘) (China High Definition DVD), is a high definition optical disc format announced in September 2007 by the Optical Memory National Engineering Research Center (OMNERC) of Tsinghua University in China.

Contents 1 History 2 Technology 3 Industry support 4 See also 5 References 6 External links

[edit] History

Originally called CH-DVD, CBHD is a joint venture between the DVD Forum and OMNERC. Development began in 2005, and an early prototype was demonstrated in 2007.^[1] In 2008 during the DVD Forum's 42nd Steering Committee Meeting the DVD Forum gave OMNERC the ability to edit HD DVD specifications.^[1]

[edit] Technology

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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While originally based upon the DVD Forum's HD DVD format, there are several differences between the two formats. CBHD uses China's AVS video codec, DRA audio codec, and a new copy protection system, DKAA, as an alternative to HD DVD's and Blu-ray's AACS.^[2][3][4][5] CBHD's developers claim the format contains more copy protection features and is part of a big push by China to fight piracy as well as cut down on royalty payments for foreign patents.^[6]

CBHD also eschews HD DVD's Advanced Content content navigation system in favor of a Chinese system called CETC.^[2]

Like HD DVD, CBHD discs have a capacity of 15GB single-layer and 30GB dual-layer and can use existing DVD production lines^[7].

[edit] Industry support

In early March 2009, Warner Bros announced that they would be supporting the CBHD format, launching with titles including the Harry Potter series and Blood Diamond, with discs selling for between 50 and 70 yuan (roughly $7.25 to $10.15).^[8] According to an August 2009 television story by TV-Tokyo, CBHD was outselling rival Blu-ray by a margin of 3 to 1 in China.^[9] In September 2009, Universal Studios and National Geographic announced their support for the format^[10].

[edit] See also

• China Video Disc (A Chinese-modified VCD format)
• HD DVD The format that CBHD is based on
• High-Definition_Versatile_Disc China's high-resolution format on DVD discs
• Blu-ray Disc An alternative high definition format
• Comparison of high definition optical disc formats

[edit] References

[edit] External links

• Official Site (English)
• High-definition discs Industry Alliance of China officially established its debut CH-DVD, ZDnet China, September 7, 2007
• Business Wire press release
• China's Olympic HD-DVD - The Future of Things article
• Homegrown CBHD discs outsell Blu-ray by 3-1 margin in China - Ars Technica

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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

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