From Wikipedia, the free encyclopedia
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.
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. In 2008 during the DVD Forum's 42nd Steering Committee Meeting the DVD Forum gave OMNERC the ability to edit HD DVD specifications.
|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)
- 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)
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. 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.
CBHD also eschews HD DVD's Advanced Content content navigation system in favor of a Chinese system called CETC.
Like HD DVD, CBHD discs have a capacity of 15GB single-layer and 30GB dual-layer and can use existing DVD production lines.
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). 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. In September 2009, Universal Studios and National Geographic announced their support for the format. Additionally adding support for the format are Paramount (US), Celestial (HK/CN) and BBC/Discovery (UK/US).