The 650R does not upscale. It is is an analogue to digital video converter.
No video up-scaling was a deliberate decision as you will already have a good scaler in your TV and Blu-ray/DVD player. This let us spend more on the amps and how the unit actually sounds for music and movies. Its simply an analogue to digital video converter, so, 576p composite in = 576p HDMI out.