Can anyone give me a detailed introduction to CD R and CD ROM

The distinction between one burner and one that cannot be burned.

CD R is a burning disc and CDROM is a CD reader.

CD-ROM (Compact Disc Read-Only Memory) is a type of optical disc used on a computer, a kind of external storage that can store a large amount of data.

This type of disc can only write data once, and the information is permanently stored on the disc and read out through the disc drive when used. A compressed disc is about inches in diameter and 1 8 inches thick and can hold about 660 megabytes of data.

All CD-ROM disks are pressed from a single master and then encapsulated into a protective polycarbonate housing. The data recorded on the master disk is spiral-shaped, spreading outward from the center, and there are many tiny pits on the surface of the disk, which is the recorded digital information. When reading the data on the CD-ROM, the disc is scanned with a laser beam and the digital information is obtained based on the changes in the reflection of the laser on the pit.

The information in the disk is stored in a spiral optical channel.

Introduced in 1983 by Philips, Sony, and Microsoft, the CD-ROM format of the Yellow Book has undergone several revisions, adopting the physical format of the CD-DA (Red Book) and adding a layer of error detection and correction standards to ensure reliable data storage. Synchronization and labeling information have also been added for more accurate positioning. The Yellow Book stipulates two modes that provide different mechanisms for error detection and correction, because stored data files (computer files) do not allow any errors, while data such as images and sounds allow for a few errors.

In 1989, the Yellow Book was accepted by ISO as ISO IEC 10149, the international standard for 120mm read-only optical disc (CD-ROM) data exchange.

CD-ROM is a read-only optical storage medium that can be stored in diameters up to 120 mm (in.)74 80 minutes of hi-fi audio, or 682 MB (74 minutes) and 737 MB (80 minutes) of data on a 2 mm (inch) thick single-sided disc. CD-ROMs have the same appearance as common CD discs, but CD-ROMs store data instead of audio.

The CD-ROM driver hopper in the PC reads data in a similar way to the CD** device, but the main difference is that a check error correction mechanism is introduced into the CD-ROM driver circuit to ensure that no errors occur when reading data.

Disc ROMs are read-only. r is writable (1 time).rw is a repeatable write.

Drives CD-ROMs are read-only CD drives; CD-RW is a rewritable CD disc drive; CD-R is a one-time CD-disc drive;

CD-ROM is the preferred medium for distributing multi-** programs. The reason is that it has a large storage capacity and low manufacturing cost, which is less than 5 yuan per piece when mass-produced. At present, a large number of documents, audio-visual materials, educational programs, film and television programs, games, books, computer software, etc. are disseminated through CD-ROM.

CD-RW discs differ from CD-R discs in four main ways:

Rewritable higher.

Slow write speed.

Lower reflectivity.

CD-RW platters have a lower write speed than CD-R discs because the laser takes more time to operate on the disc when writing data. Unlike the CD-R organic dye layer, the recording layer of the CD-RW disc is composed of silver, indium, antimony, and tellurium alloys. The burning layer of the alloy has a polycrystalline structure with an emissivity of about 20 emissivity.

The laser head of the CD-RW driver has two wavelength settings, P-Write and P-Eraze, and the laser heats the contents of the burning layer to between 500 and 700 degrees Celsius to melt it. In the liquid state, the molecules of the substance move freely and the polycrystalline structure is altered to present an amorphous (instantaneous) state. The reflectivity of the burning layer material solidified in this state is only 5, and these low reflectivity are equivalent to "depressions" on the CD-ROM platter.

1. All ***-ROM discs, i.e. *** read only memory, are read-only discs that store computer data, and are similar to CD-ROMs, which are the replacement products of CD-ROM discs. Any data information can be stored on ***-rom discs, such as: electronic publications, multi-software and computer games.

The large capacity of the disc provides software creators with a huge space for imagination and a stage to display their talents, and can use it to develop more colorful programs. With its large capacity to store more data information, it will bring huge development prospects to the multi-**.

Answer: CD stands for Small Laser Disc 2113, also known as Laser Disc 5261, which is a 1653 standard CD format used to store sound signals 4102 tracks such as ** and songs. CD-ROM is called read-only CD-ROM memory, and a large number of documents, audio-visual materials, educational programs, film and television programs, games, books, computer software, etc. are disseminated through CD-ROM.

So there is a difference between a CD-ROM and a CD.

CD-ROM is a type of optical disc that is used on a computer.

CD-ROM is optical disc read-only memory, a type of external storage capable of storing large amounts of data**, a compressed disc is about inches in diameter and 1 8 inches thick, and can hold about 660 megabytes of data.

The rate of CD-ROM drives is expressed as "X times the speed", and the standard speed of the CD-ROM drive is 2 times the speed, 4 times the speed, 8 times the speed, etc., and it can reach 50 times the speed at present. With the development of technology, there has been a digital multi-function disk (***), which has a larger storage capacity, now in gigabytes, and higher, and has better image clarity and better high-fidelity results.

The CD-ROM disc is made of carbonate with a 15 mm diameter hole in the center. A spiral-shaped physical track is cast on the disc base, spiraling from the inside of the disc to the outermost ring, and the inside of the track is lined with etched "pits", which constitute the stored data information.

d, which is the disc. A CD-ROM is a CD-ROM based on its name. The ROM in the back is the recorder! d. Disc d, Disc Floppy Disk, Floppy Disk, Hard Disk, Hard Disk, Memory