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Brief definition about DVD

DVD, also known as Digital Video Disc or Digital Versatile Disc, is an optical disc storage media format, and was invented and developed by Philips, Sony, TOSHIBA, and Time Warner in 1995. Its main uses are video and data storage. blank DVD s are of the same dimensions as compact discs (blank CD s), but store more than six times as much data.

Variations of the term DVD often indicate the way data is stored on the discs: DVD-ROM (read only memory) has data that can only be read and not written; DVD-R and DVD+R (recordable) can record data only once, and then function as a DVD-ROM; DVD-RW (re-writable), DVD+RW, and DVD-RAM (random access memory) can all record and erase data multiple times. The wavelength used by standard DVD lasers is 650 nm; thus, the light has a red color.

DVD-Video and DVD-Audio discs refer to properly formatted and structured video and audio content, respectively. Other types of DVDs, including those with video content, may be referred to as DVD Data discs.

The official DVD specification documents have never defined the initialism DVD. Usage in the present day varies, with Digital Versatile Disc, Digital Video Disc, and DVD being the most common. DVD was originally used as an initialism for the unofficial term digital videodisk. It was reported in 1995, at the time of the specification finalization, that the letters officially stood for Digital Versatile Disc (due to nonvideo applications).

A newsgroup FAQ written by Jim Taylor (a prominent figure in the industry) claims that four years later, in 1999, the DVD Forum stated that the format name was simply the three letters “DVD” and did not stand for anything.

The DVD Forum website has a section called “DVD Primer” in which the answer to the question, “What does DVD mean?” reads, “The keyword is ‘versatile.’ Digital Versatile Discs provide superb video, audio and data storage and access—all on one disc.”

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Broadband Connection

What is broadband? For those who wish to upgrade their internet service provide, this salient question may be the first thing that come to our minds. But the one important question should be: What can broadband do for me that dial-up can’t?

Broadband has been taking the internet service provider wars by storm. There are tremendous benefits for broadband that individuals and business are rapidly switching to this internet pipeline. Broadband is a form of telecommunications by which a broad range of frequencies is available to wire information. The most common forms of broadband are cable and DSL. With the advent of broadband, the dial-up modem is slowly being shunted aside. Here are a few reasons why more individuals and companies are switching to broadband.

Broadband is built for speed. Because of the wide range of frequencies available, data through the internet can be multiplexed, which allows the quick transfer and delivery of information. In fact, broadband on average is around 20 times faster than dial-up. Dial-up is usually 28-56 kilobits per second (kps) and broadband is around 1500kps.

Speed is important for content delivery, particularly media. For instance, media such as videos and music demand speeds for adequate streaming. Or even popular sites such as youtube.com require a fast connection. Games, such as online role-playing games, hog connection bandwidth to adequately play online.

Broadband provides users with more than just speed. One great advantage is that it’s always on and connected. In the world of dial-up, one needs to connect through a phone line. So to connect you must dial-up, get a “handshake” and wait for the connection to be available. This process could take up to one minute, or even more, causing frustration. With broadband, there is no attempt to dial-up to the server. As long as the physical connection is maintained, the connection does not need to be dialed up. All one needs to do is have the computer connected via a LAN cable, or wireless.

This alternative service also frees up your home phone. Sometimes with dial-up, the phone line competes with the dial-up line. As such, users can only use the phone line one at a time. With broadband, access is kept separate; which means that you can still maintain a dedicated phone line. Who would want to lose important phone calls?

Can you save money with this broadband? Most will think that broadband might be a little costly; indeed, it is. However, this service does allow for Voice Over Internet Protocol (VOIP) for a cheap price. VOIP is a cost-effective way to provide IP telephony services through the delivery of voice information over the Internet. In other words, VOIP can replace your normal telephone. Some save over 50% of their phone bills with a VOIP subscription.

If you have more than one computer, you can find that it’s not easy to share a dial-up line. Usually, only one computer can use the same line. Broadband, however, allows more than one connection. In fact, there’s really no limit at all as long as bandwidth isn’t full. Dial-up may require additional lines, if there is more than one computer needing access.

Broadband provides many advantages over dial-up. Although you’ll pay a premium for its service, the benefits outweigh the costs for most people.

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