Upconverting Receiver FIrst Home Theater Receiver, HDMI Questions?

FIrst home theater receiver, HDMI questions? - upconverting receiver

have my home theater receiver, 3-4 HDMI inputs, 1 output, the difference is by or upconversion. Is the HDMI supports video and audio? It is now only connected to a Blue Ray player Ito. You need component audio cables, in addition to HDMI, is the blue ray through degraded signals up to 1080p conversion receiver is directly over a pass-through?. Has anyone answers?