Digital Files

[jason69uk]

Can AVIS or any digital video not wear out like a video would or not wear out full stop?? cos it is all digital??

So could i watch a film as many times as i wanted on the pc without the picture going bad or sound going funny??

[rallynavvie]

Oh my, no.

[jason69uk]

Would ya mind explaining why..

[BJ_M]

you can watch it as many times as you want on a pc

[yoda313]

Hello,

DIGITAL = NO MOVING PARTS.

That's why it will never wear out.

Conversion will lose some quality but will always look the way it does at the last conversion process.

Kevin

[Capmaster]

The problem with analog like tape, is that the signal must remain the same for the quality to be preserved. The signal is read and the resulting signal is a constantly changing voltage. Change even the slightest thing in the original source and you will see the effect on the signal. The picture degrades. Each time you watch an analog tape is not quite as good as the last time because as the magnetized coating passes over the head it loses some magnetism. It must because of a principle called conservation of energy.

Digital is different because it is written as "1" or "0" ...always. A digital video is nothing more than a series of 1s and 0s. As long as the reader sees a "1", it's as good as it always was. Even if the "1" isn't as pronounced in, say ...5 years, the reading circuitry has automatic gain control which increases its sensitivity until it reads it as a strong "1". The same with the "0". Even if the occasional "1" or "0" fades, the player has a function called "extrapolation" which analyzes the previous bits and the following bits and makes an educated guess what was there, and replaces it in the signal. It works very well.

So 5 years from now or 10 or 20 the picture will be exactly as good as the very day it was written 8)

[bazooka]

Thank you, Mr. engineer.

[Capmaster]

Thank you, Mr. engineer.

Was that necessary? I was explaining the difference in media and the advantages of digital.

If you don't have anything positive to say in a thread, pass on by and go to another. Comments like this aren't helping the topic starter.

[bazooka]

Thank you, Mr. engineer.

Was that necessary? I was explaining the difference in media and the advantages of digital.

If you don't have anything positive to say in a thread, pass on by and go to another. Comments like this aren't helping the topic starter.

Well, excuse me....

The topic starter had already had this discussion with me and I told him that the file was just a bunch of numbers with no moving parts.

How much more in depth do you need to get? :P

[guns1inger]

The other problem with tape as a medium is that it stretches over time, even with little use. This also causes signal degradation and other issues.

I do remember, many years ago, having a conversation with a man who very ernestly tried to tell me that CDs would not last forever, as the laser would wear a groove in the disk with repeated use. Hopefully he is now have a peaceful time in a home for the bewildered.

[ViRaL1]

The other problem with tape as a medium is that it stretches over time, even with little use. This also causes signal degradation and other issues.

I do remember, many years ago, having a conversation with a man who very ernestly tried to tell me that CDs would not last forever, as the laser would wear a groove in the disk with repeated use. Hopefully he is now have a peaceful time in a home for the bewildered.

Although he was off base, they WILL wear out eventually, which sux.