^
Onkyo: those hi-end AVR's with a 2-line display shows both the audio being decoded and the source
Denon: for 1-line display AVR's, it displays side by side both the audio being decoded and the source i.e. Media player, Blu-Ray, TV, etc
for 2-line displayAVR's, same with Onkyo
Yamaha: IIRC, it displays only the audio being decoded. via Info button, I think it'll toggle display the DSP or audio after-processing function (if you are using one) and the source
i may be inaccurate. masters, please correct me if I'm wrong =))