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A brief history of the CD Technology

A brief history of the CD Technology. Yoba Amoah ECE-E 443 03/31/05. Washington native, James T. Russell patented the original CD in 1965 .

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A brief history of the CD Technology

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  1. A brief history of the CD Technology Yoba Amoah ECE-E 443 03/31/05

  2. Washington native, James T. Russell patented the original CD in 1965. • During its refinement in the early 1970’s, James plotted the technology to burn holes, via laser, in pits into plastic coated disc and each “pit” or “hole” would characterize a sound or noise. • SONY eventually purchased the license to create CD’s from James. • Sony in the mid-1985 began to churn out some of its popular artists on CD. • Compact discs produced today are encoded with an anti-copying mechanism to prevent piracy. • Only a small fraction of the money earned on a cd goes to theband itself. • Most of the profits made by the record company are spent on advertising and manufacturing costs. • The average cost to manufacture a CD is $2 to $4.

  3. Understanding the CD • A CD can store up to 74 minutes of music. • The total amount of digital data that must be stored on a CD is: • 44,100 samples/channel/second x 2 bytes/sample x 2 channels x 74 minutes x 60 seconds/minute = 783,216,000 bytes • To fit more than 783 megabytes (MB) onto a disc only 4.8 inches (12 cm) in diameter requires that the individual bytes be very small. • By examining the physical construction of a CD, you can begin to understand just how small these bytes are.

  4. Standards and Specifications • Red Book - 1980 standard document that contains specifications for CD-DA (CD-Digital Audio) • Subsequent CD formats (as well as DVD formats) all follow the basic Red Book specification. • Yellow Book - which, in conjunction with other standards, details the specifications for CD-ROM and CD-ROM XA • Orange Book - which details the specifications for CD-R, CD-WO, CD-RW, and CD-MO • White Book - which details the specifications for various multimedia disks, such as Video CD • Green Book - which details the specifications for CD-i • Blue Book - which details the specifications for enhanced CD • Scarlet Book - which details the specifications for Super Audio CD • Purple Book - which specifies the Double Density CD (DDCD)

  5. Optical Media Drive Capabilities

  6. Rotation speed indicates the revolutions per minute or RPM range that the drive can produce. Data transfer rate refers to the speed at which data can be read from an optical media drive.

  7. Old School CD Players Sony CDP-101 - the Compact Disc is Introduced The CD Prototype "Goronta" exhibited at the Audio Fair in fall 1981.

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