Plextor ConvertX PX-M402U - Page 11

Video Quality Tests Page 7

Still images and MPEG-4 Format

Still images are used to investigate the behaviour of the converter with a wider range of colours. Clarity, distortion and brightness are also investigated. Still images are compared with the images provided on the Pioneer disc, without any kind of conversion. We tried to use dark as well as light images.

On this page, MPEG-4 based profiles were used (MPEG-4 and DivX). The same frame was extracted for every occasion, and the image was zoomed by 400%. Clicking on the photos will reveal full sized high resolution images for better comparison.

DVD unconverted image
MPEG-4 High Quality Conversion
MPEG-4 Good Quality Conversion
MPEG-4 Standard Play Conversion
MPEG-4 Long Play Conversion
MPEG-4 Extended Play Conversion
DivX Conversion
DivX Long Play Conversion

Again, colour distortion was noticable, but the distortion factor seems to be lower than before. DivX conversion and MPEG-4 high quality conversion are almost the same. DivX LP conversion produced the worst results but with smaller file size.

DVD unconverted image
MPEG-4 High Quality Conversion
MPEG-4 Good Quality Conversion
MPEG-4 Standard Play Conversion
MPEG-4 Long Play Conversion
MPEG-4 Extended Play Conversion
DivX Conversion
DivX Long Play Conversion

Brighter image and better quality results. Although there is still colour distortion, colours are more accurate. Compared to MPEG-2 conversion, MPEG-4 high quality conversion produces better results than MPEG-2 conversion, but with a similar file size.