DVDFILE.COM Forum - View Single Post - The Official (and only) Optical vs. Coaxial Thread

AirSickMoth · 04-23-2002, 10:22 AM

I was just thinking....

In the good old days of CD's the CD player would error check the data it is reading off the disc. It would check it in case there was a small scratch on the disc. If data was missing due to a scratch, the CD player could use redundancy bits to recreate the missing info. Then it would convert it to analog, and send it to your amps.

Now in the world of DVD....

The DVD player does the same thing when it is sending out info through the analog conections.

But when the DVD player is sending through the digital connections, how much error checking does it do? I imagine that it still does the checking for the errors in reading off the disk. Corrects any errors. Then it sends the correct bit stream to the reciever. The reciver would then check the bit stream it gets for transmision errors.

Now, there might be a small difference between DVD players in this error checking. But error checking is only as good as the encoded material is prepared for it. So, in the end there is probably no difference.

So, I agree completly with 1138.

What? Do, more expensive DVD players add extra bits to the bit stream? Do they replace bad sounding bits with better ones?

Well, it is imposible for the answer to be yes.

How is it possible for it to sound better? If there is digital info missing, you don't get a fuzzy sound or a quiet sound, you get no sound or small pops.

1138, I really enjoyed your modem comment. Just think of all the MB's that go through your cable modem every day.... with no errors. Well, no errors after it goes through error checking.

Just think, when you request to view a page (say 5kB big) the server splits it up into hundreds of packets. These packets get sent through hundreds of different paths. They travel across thousands of miles of Fiber optic cable. They all end up at your computer, almost always in the improper order. Your computer checks them out, fixes any errors (sometimes asks for packets to be resent), combines the packets, and displays the page.

Do people really think that if they have better equipment the page will be a little bit better? Do people think that spelling mistakes are due to crappy computers? No, stuff like that does not happen. If there was an error with the data you recieved, the page would not show, or more likely, your computer would crash.

Millions of pages viewed every day by people all over the world and there are only a hand full of fatal errors every day.

04-23-2002, 10:22 AM	#70 (permalink)
AirSickMoth Actor Join Date: Jun 2001 Location: Victoria, BC, Canada	I was just thinking.... In the good old days of CD's the CD player would error check the data it is reading off the disc. It would check it in case there was a small scratch on the disc. If data was missing due to a scratch, the CD player could use redundancy bits to recreate the missing info. Then it would convert it to analog, and send it to your amps. Now in the world of DVD.... The DVD player does the same thing when it is sending out info through the analog conections. But when the DVD player is sending through the digital connections, how much error checking does it do? I imagine that it still does the checking for the errors in reading off the disk. Corrects any errors. Then it sends the correct bit stream to the reciever. The reciver would then check the bit stream it gets for transmision errors. Now, there might be a small difference between DVD players in this error checking. But error checking is only as good as the encoded material is prepared for it. So, in the end there is probably no difference. So, I agree completly with 1138. What? Do, more expensive DVD players add extra bits to the bit stream? Do they replace bad sounding bits with better ones? Well, it is imposible for the answer to be yes. How is it possible for it to sound better? If there is digital info missing, you don't get a fuzzy sound or a quiet sound, you get no sound or small pops. 1138, I really enjoyed your modem comment. Just think of all the MB's that go through your cable modem every day.... with no errors. Well, no errors after it goes through error checking. Just think, when you request to view a page (say 5kB big) the server splits it up into hundreds of packets. These packets get sent through hundreds of different paths. They travel across thousands of miles of Fiber optic cable. They all end up at your computer, almost always in the improper order. Your computer checks them out, fixes any errors (sometimes asks for packets to be resent), combines the packets, and displays the page. Do people really think that if they have better equipment the page will be a little bit better? Do people think that spelling mistakes are due to crappy computers? No, stuff like that does not happen. If there was an error with the data you recieved, the page would not show, or more likely, your computer would crash. Millions of pages viewed every day by people all over the world and there are only a hand full of fatal errors every day.