A brief history of the cd technology Yoba Amoah ece-e 443

A brief history of the CD Technology

• Yoba Amoah

• ECE-E 443

• 03/31/05

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.

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)

Optical Media Drive Capabilities

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.

Old School CD Players