Nola is correct. Some of the early Zenith DVB318s "inadvertently" had upsampled output via the component video output. I think it was later "fixed" via software.
There is more information than you will ever care to read about this subject on the DVD player forum at www.AVSforum.com.
Enjoy,
TIC
There is more information than you will ever care to read about this subject on the DVD player forum at www.AVSforum.com.
Enjoy,
TIC