Plextor ConvertX PX-M402U - Page 12

Video Quality Tests Page 8

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

Worst results were produced with the DivX LP and the MPEG-4 EP conversions. Colour distortion is again present and it looks like this disortion is common to all conversion profiles for this device.

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

Nothing unusual again. Worst results came from DivX LP and MPEG-4 EP conversions. In general, MPEG-2 high quality profiles produce almost the same results as the MPEG-4 high quality profiles. Only the coding method is changed and both formats produce similar file sizes.