(pdf) multimedia and its applications


ISSN:-2349-3585 |www.ijrdt.org


data, initially established for storing digital audio. The CD,

accessible on the market since late 1982, remains the typical

playback medium for marketable audio recordings to the

current day, however it has lost ground in recent years to MP3

players. Anaudio CDconsists ofone or more stereo tracks

stored using 16-bit PCM coding at a selection rate of 44.1

kHz. Standard CDs have a diameter of 120 mm and can taking

hold about 80 minutes of audio. There are also 80 mm discs,

sometimes used for CD singles, which hold approximately 20

minutes of audio. The technology was later adapted for use as

a data storage device, known as a CD-ROM, and to include

record once and re-writable media (CD-R and CD-RW

respectively). CD-ROMs and CD-Rs stay widely used

practical application in the computer industry as of 2007. The

CD and its extensions have been extremely successful: in

2004, the worldwide sales of CD audio, CD-ROM, and CD-R

reached about 30 billion discs. By 2007, 200 billion CDs had

been sold global.

6.2 DVD

DVD (also known as “Digital Versatile Disc” or “Digital

Video Disc”) is a best-selling optical disc storage media

format. Its primary uses are video and data storage. Most

DVDs are of the identical dimensions as compact discs (CDs)

but store more than 6 times the data. Variant of the term DVD

often depict the way data is stored on the discs: DVD-ROM

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has data which can only be read and not written, DVD-R can

be written once and then functions as a DVD-ROM, and

DVD-RAM or DVD-RW holds data that can be re-written

multiple times. DVD-Video and DVD-Audio discs

respectively mention todecently formatted and organized

video and audio contented. Another types of DVD discs,

consider those with video content, may be referred to as DVD-

Data discs. The term “DVD” is commonly misused to refer to

high density optical disc formats in general, such as Blu-ray

and HD DVD.“DVD” was originally used as an initialism for

the unofficial term “digital video disc”. It was reported in

1995, at the time of the specification finalization, that the

letters officially stood for “digital versatile disc” (due to non

video applications), however, the text of the press release

announcing the specification finalization only refers to the

technology as “DVD”, making no mention of what (if

anything) the letters stood for. Usage in the present day varies,

with “DVD”, “Digital Video Disc”, and “Digital Versatile

Disc” all being common.

6.3 About Flash Drives

A USB flash drive is a data storage device that includes flash

memory with an integratedUniversal Serial Bus (USB)

interface. USB flash drivesare typically removable and

rewritable, and physically much smaller than a floppy disk.

Most weigh less than 30 g. As of January 2021 drives of 1

terabytes (TB) are available. and storage capacities as large as

2 terabytes are planned, with steady improvements in size and

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price per capacity expected. Some allow up to 100,000

write/erase cycles (depending on the exact type of memory

chip used) and 10 years shelf storage time. USB flash drives

are often used for the same purposes for which floppy disks or

CD-ROMs were used. They are smaller, faster, have

thousands of times more capacity, and are more durable and

reliable because they have no moving parts. Until

approximately 2005, most desktop and laptop computers were

supplied with floppy disk drives, but floppy diskdrives have

been abandoned in favor of USB ports. USB flash drives use

the USB mass storage standard, supported natively by modern

operating systems such as Linux, MacOS X, Windows, and

other Unix-like systems, as well as many BIOS boot ROMs.

USB drives with USB 2.0 support can store more data and

transfer faster than much larger optical disc drives like CD-

RW or DVD-RW drives and can be read by many other

systems such as the Xbox 360, PlayStation 3, DVD players

and in some upcoming mobile smart phones.

6.4 About Internet

The Internet is a global system of interconnected computer

networks that use the standard Internet protocol suite (TCP/IP)

to serve billions of users worldwide. It is a network of

networks that consists of millions of private, public, academic,

business, and government networks, of local to global scope,

that are linked by a broad array of electronic, wireless and

optical networking technologies. The Internet carries an

extensive range of information resources and services, such as

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the inter-linked hypertext documents of the World Wide Web

(WWW) and the infrastructure to support email.


(pdf) multimedia glossary



Teleconference: A general term for a meeting not held in person.

Usually refers to a multi-party telephone call, set up by the Phone

Company or private source, which enables more than two callers to

participate in a conversation. The growing use of video allows

participants at remote locations to see, hear, and participate in

proceedings, or share visual data (“video conference”).

Time Code: A frame-by-frame address code time reference

recorded on the spare track of a videotape or inserted in the

vertical blanking interval. It is an eight-digit number encoding time

in hours, minutes, seconds, and video frames (e.g.:02:04:48:26).


URL: Uniform Resource Locator: a logical address that identifies a

resource on the Internet.


Virtual Reality: Technology that allows the user to experience 3D

interaction with the computer. Some VR systems may incorporate

special visors, helmets, gloves, andspecial 3D graphics technology

to simulate the real world environment.

VRML: Virtual Reality Modeling Language: a database description

language applied to create 3D worlds. VRML viewers, similar to

HTML Web browsers, interpret VRML data downloaded from the

Web and render it on your computer. This allows the bulk of the


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