1. 
   Upconversion
   The reproduction of a lower resolution image such as PAL/NTSC to a higher definition image.
   Found op http://www.encyclo.co.uk/visitor-contributions.php
   
   
2. 
   Upconversion
   The term used to describe the conversion of a lower resolution to an apparently higher one. This process increases the number of pixels and/or frame rate and/or scanning format used to represent an image by interpolating existing pixels to create new ones at closer spacing.
   Found op http://www.crutchfield.com/S-np170FLGK7y/learn/learningcenter/home/tv_gloss
   
   

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