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Blu-Spec
Blu-spec is a format of Compact Disc, compact disc that was made using the same technology as Blu-ray discs had in the mastering process. The alleged benefit of these was in the playback accuracy. The back catalogue of mainstream artists were released in this format. Background News was out in November 2009 that Japanese company Sony Music Entertainment had developed a new CD that had compatibility with standard compact disc players, hence the CD in the name. It was claimed by Sony Music Entertainment that in the production process, new machines were used to make the master discs. They are completely compatible with existing disc players. With the mastering of the Blu-spec CD being the same as a Blu-ray, the more precise authoring relates to a better sound quality than normal CDs. When a standard CD is mastered, an Infared beam is used to make the digital notches on the master disc (mother matrix). With the Blu-spec master, a blue laser is used which is a finer etching process. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Optical Disc
In computing and optical disc recording technologies, an optical disc (OD) is a flat, usually circular disc that encodes binary data (bits) in the form of pits and lands on a special material, often aluminum, on one of its flat surfaces. Its main uses are physical offline data distribution and long-term archival. Changes from pit to land or from land to pit correspond to a binary value of 1; while no change, regardless of whether in a land or a pit area, corresponds to a binary value of 0. Non-circular optical discs exist for fashion purposes; see shaped compact disc. Design and technology The encoding material sits atop a thicker substrate (usually polycarbonate) that makes up the bulk of the disc and forms a dust defocusing layer. The encoding pattern follows a continuous, spiral path covering the entire disc surface and extending from the innermost track to the outermost track. The data are stored on the disc with a laser or stamping machine, and can be accesse ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
