What is CD-ROM in computer?
CD-ROM (Compact Disc, read-only-memory) is an adaptation of the CD that is designed to store computer data in the form of text and graphics, as well as hi-fi stereo sound. The original data format standard was defined by Philips and Sony in the 1983 Yellow Book.
What is CD-ROM with example?
Cd-rom-drive definition The definition of a CD-ROM drive is the place on a computer where a compact disc can be held, read and played. An example of a CD-ROM drive is where a person can play a music CD on the computer.
What is the structure of CD-ROM?
Physically, the standard compact disc is a disc made of clear polycarbonate plastic, coated with a reflective metal, and a protective coat of clear lacquer. Data is placed on the CD-ROM in the form of small pits recorded in a spiral track starting at the center of the CD- ROM and working to the outer edge.
What are the blocks of CD player?
A CD player has three major mechanical components : a drive motor, a lens system or pickup head, and a tracking mechanism.
What are the features of CD-ROM?
A compact disc format used to hold text, graphics and hi-fi stereo sound. It’s like an audio CD with spiral, grooved tracks, but uses a different format for recording data. The audio CD player cannot play CD-ROMs, but CD-ROM players can play audio discs.
How does a CD drive work?
A CD-ROM drive uses a low-power laser beam to read digitized (binary) data that has been encoded in the form of tiny pits on an optical disk. The drive then feeds the data to a computer for processing. The standard compact disc was introduced in 1982 for digital audio reproduction.
What are the advantages of CD-ROM?
The major advantages of the CD-ROM technology are: high-capacity data storage; data security and integrity; stability of the optical medium, especially compared to magnetic media; the ability to store digital, audio, and video data, a direct result ofstorage capacity and laser technology; and ease of mass production.
Which type of memory is CD-ROM?
A CD-ROM (/ˌsiːdiːˈrɒm/, compact disc read-only memory) is a pre-pressed optical compact disc that contains data. Computers can read—but not write or erase—CD-ROMs, i.e. it is a type of read-only memory.
How is data stored in a CD?
Data is stored on the disc as a series of microscopic indentations called “pits”, with the non-indented spaces between them called “lands”. A laser is shone onto the reflective surface of the disc to read the pattern of pits and lands.
Who invented CD-ROM?
While most are 120 mm, mini versions exist too. The earliest technology resembling the CD-ROM was invented by James Russell, who worked for the Pacific Northwest National Laboratory at the United States Department of Energy.
How data is stored in CD?
CD data is stored as a series of tiny indentations (pits), encoded in a tightly packed spiral track of pits moulded into the top of the polycarbonate layer. The areas between pits are known as ‘lands’. Each pit is approximately 100 nm deep by 500 nm wide, and varies from 850 nm to 3.5 μm of length.
What is computer block diagram system?
Computer Block Diagram System: Mainly computer system consists of three parts, that are central processing unit (CPU), Input Devices, and Output Devices. The Central Processing Unit (CPU) is divided into two parts again: arithmetic logic unit (ALU) and the control unit (CU). The set of instruction is in the form of raw data.
What is a CD-ROM disk?
A CD-ROM ( / ˌsiːdiːˈrɒm /, compact disc read-only memory) is a pre-pressed optical compact disc that contains data. Computers can read—but not write to or erase—CD-ROMs, i.e. it is a type of read-only memory .
Is a CD-ROM read-only memory?
A CD-ROM (/ ˌ s iː d iː ˈ r ɒ m /, compact disc read-only memory) is a pre-pressed optical compact disc that contains data. Computers can read—but not write to or erase—CD-ROMs, i.e. it is a type of read-only memory .
How is data stored on a CD-ROM?
Data stored on CD-ROMs follows the standard CD data encoding techniques described in the Red Book specification (originally defined for audio CD only). This includes cross-interleaved Reed–Solomon coding (CIRC), eight-to-fourteen modulation (EFM), and the use of pits and lands for coding the bits into the physical surface of the CD.