Blu-spec CD
Encyclopedia
Blu-spec CD describes an Audio CD
manufactured by a proprietary process introduced by Sony Music Entertainment Japan
in late 2008. Its name derives from the similar manufacturing process to that used to create Blu-ray Disc
s. Instead of a traditional infra-red laser, a blue laser
is used for recording the pits on the CD master that is needed for disc replication. The blue laser creates more precise pits, causing less distortion in the optical read-out process.
A Blu-spec CD can be played on all CD players and does not require a blue laser to be read.
Compact Disc
The Compact Disc is an optical disc used to store digital data. It was originally developed to store and playback sound recordings exclusively, but later expanded to encompass data storage , write-once audio and data storage , rewritable media , Video Compact Discs , Super Video Compact Discs ,...
manufactured by a proprietary process introduced by Sony Music Entertainment Japan
Sony Music Entertainment Japan
is Sony's music arm in Japan. SMEJ is directly owned by Sony Corporation and independent from the United States-based Sony Music Entertainment due to its strength in the Japanese music industry....
in late 2008. Its name derives from the similar manufacturing process to that used to create Blu-ray Disc
Blu-ray Disc
Blu-ray Disc is an optical disc storage medium designed to supersede the DVD format. The plastic disc is 120 mm in diameter and 1.2 mm thick, the same size as DVDs and CDs. Blu-ray Discs contain 25 GB per layer, with dual layer discs being the norm for feature-length video discs...
s. Instead of a traditional infra-red laser, a blue laser
Blue laser
A so-called blue laser is a laser that emits electromagnetic radiation at a wavelength of between 360 and 480 nanometres, which the human eye sees as blue or violet. Diode lasers which emit light at 445 nm are becoming popular as handheld lasers. Light of a shorter wavelength than 400 nm is...
is used for recording the pits on the CD master that is needed for disc replication. The blue laser creates more precise pits, causing less distortion in the optical read-out process.
A Blu-spec CD can be played on all CD players and does not require a blue laser to be read.
See also
- Compact DiscCompact DiscThe Compact Disc is an optical disc used to store digital data. It was originally developed to store and playback sound recordings exclusively, but later expanded to encompass data storage , write-once audio and data storage , rewritable media , Video Compact Discs , Super Video Compact Discs ,...
- Cross-interleaved Reed-Solomon codingCross-Interleaved Reed-Solomon CodingIn the compact disc system, cross-interleaved Reed-Solomon code provides error detection and error correction. CIRC adds to every three data bytes one redundant parity byte.-Overview:...
- DSD-CD (SonySony, commonly referred to as Sony, is a Japanese multinational conglomerate corporation headquartered in Minato, Tokyo, Japan and the world's fifth largest media conglomerate measured by revenues....
) - K2 High DefinitionK2 High DefinitionK2 High Definition is a mastering technique developed by JVC Music. K2 HD encodes the music in 24 bit and 100 kHz resolution while in the mastering stage, even though the end product is a standard red book CD and does not require special hardware for playback.-External links: *...
(JVCJVC, usually referred to as JVC, is a Japanese international consumer and professional electronics corporation based in Yokohama, Japan which was founded in 1927...
) - XRCD (JVC)
- HDCD (Pacific Microsonics/MicrosoftMicrosoftMicrosoft Corporation is an American public multinational corporation headquartered in Redmond, Washington, USA that develops, manufactures, licenses, and supports a wide range of products and services predominantly related to computing through its various product divisions...
) - SHM-CD
External links
- company press release by Sony Music Entertainment (PDF) (Japanese)