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sharesmile
FAQ-DVD
on Nov 9, 2006 at 3:24:57 am

They [DVD discs] look like Compact Discs. What's the big deal?

DVD discs are the same diameter (120mm) and thickness (1.2mm) as a Compact Disc, but that is where the similarities end. A single DVD disc has the capability to store up to 13 times the data contained on a CD, on one side! If you factor in DVD's capability to utilize both sides of a disc for data storage, you have an information marvel that offers 26 times the power of a Compact Disc!

That enhanced capability is a tremendous enabling device. DVD will revolutionize Multimedia, information retrieval and storage and mobile navigation. DVD will create new high quality audio standards, impact learning and training videos, and bring the Cinema experience to Home Entertainment.

How long will DVD movies play before I have to turn the disc over?

At an average bit rate of 4.5Mbs, a single sided DVD disc has the playback capability of 133 minutes of the highest quality audio and video images. That's nearly 92% of all Hollywood titles ever made!

In fact, a dual layer DVD disc can provide up to 4 hours of the highest quality audio and video on a single side of the disc!

Will DVD movies play on my current CD player?

No, you will require a DVD player that is equipped to read the pits and lands of a DVD disc and decode the MPEG-2 data signal.

What is the digital audio output on the back of my DVD player for?

This connector outputs a digital data stream that may be sent to an outboard D/A converter for 2 channel audio processing. More importantly, it may be connected to an audio receiver equipped with a Dolby AC-3 processor for multi-channel audio decoding.

What are the advantages of Dolby? Digital Surround AC-3?

Dolby Digital Surround offers discrete processing of 5 independent channels ( Left, Center, Right, Left Surround, Right Surround, and an additional effects channel that may be routed to a subwoofer) of audio information. Dolby Digital Surround provides the producers of movie soundtracks added flexibility and creativity in the studio that results in more realism, and a "you are there experience." Each of the 5 Audio channels is a full range (20-20khz) signal. The discrete nature of Dolby Digital Surround provides increased clarity (especially critical for dialogue) and spatial realism. With Dolby Digital Surround, audio images may be panned across the front of the room; from front to rear; from rear to front; and even diagonally.

Will DVD discs wear out, like VHS movies?

No. The picture quality of the DVD disc is consistent from the first play to the thousandth play. Plus, DVD discs will not deteriorate over time, are unaffected by magnetic fields (which can literally erase a VHS cassette) and do not require rewinding after viewing.

Are there any differences between DVD and video formats?

Of course there are,video formats can be multiple,while DVD just one of the video formats,Usually wo need a vonverter to achive the converting between the diverse formatted video files.

Can you recommend several top softwares in the field?

Yes.There are many excellent programms can make it such as cucusoft xilisoft imtoo PQ and others.As to Price,xilisoft,imtoo and PQ have little discrepancy,as to performance,they have similar softwares to do the similar things;as to inteface,xilisoft and cucusoft do much better.

What is an Aspect Ratio? Why is it important?

Aspect ratio refers to the ratio of width to height of a television set. Traditional television sets have a 4:3 aspect ratio. Widescreen television sets have a 16:9 aspect ratio. Traditional television sets are almost square in appearance; widescreen displays are more rectangular.

The DVD defines the capability to display movies in 3 different ways:

Widescreen, which provides a special "anamorphic video" signal that, when processed by a widescreen television set, fills the entire screen and delivers optimum picture quality.
Pan and Scan, a version that fills the screen of traditional 4:3 television sets with an entire picture, much like watching network movies.
Letterbox mode, which provides horizontal bands at the top and bottom to, in essence, create a widescreen picture in a traditional television set.
Each of the 3 display modes, if provided by the Hollywood producer, may be selected for viewing if the viewing device (player or DVD-ROM playback sub-system) is so equipped.


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