India Broadband Forum

just4kix

Many people have raved about the quality of DViX/XViD. They claim it as good as the original.

OK. Here is the analysis for all of you to see. I have taken the snap from the serial Friends from the first episode of Season 3. The name of the episode is "The One with the Princess Leia Fantasy"

Snapshot A: Taken by PowerDVD from the Original DVD owned by me.



Snapshot B: Taken by VLC Player from the episode from XViD source



Here is a comparison for the movie Batman Begins. The XViD source is aXXo.

For aXXo and other XViD/DViX sources the difference is even more remarkable. Because aXXo conversions are reduced to 700 MB to fit on one CD, the size of the frame is reduced from 720x480 (typical widescreen) to 608x256.

Snapshot A: Taken by PowerDVD from the Original DVD owned by me.



Snapshot B: Taken by VLC Player from the aXXO content.



Please leave your comments.

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rupu1983

It's all depend on bit rates and codec uses
MPEG-1 VCR quality video storage on CDs
MPEG-2(codec H.262) Provides VCR to HDTV quality depending on data rates.It often 50:1 compression of raw video
(NTSC broadcast television in digital form requires 45-120 Mbit/s MPEG-2 require 1.5-15Mbit/s HDTV would require 800 Mbit/s uncompressed)
MPEG-4(codec H.263/H.264)
There are two type of MPEG compression
1.Video- Spatial or interframe compression,which forms a block identifier for group pixels having the same characteristics(color,intensity etc) for each frame only the block identifier is transmitted.
2.Audio- which uses psychoacoustic model of maskin effect
Now when DVD(MPEG-2) encoded into MPEG-4 then it's quality will depend on bit rates some times software try to rip within 700Mb (what ever the run time) that makes effect in video

just4kix

In short DVD renders richer colours and richer blacks.

saurav_k

of course full length dvd5 and dvd9 prints would be far better than 700mb rips whether it be of axxo or any other ripper.