Originally Posted by villager
I'm thinking about getting the Denon Avr-1909. It looks like it doesn't have Hdmi upscaling to 1080p. What exactly does that mean? Would I notice the difference in sound? This receiver has like 4 Hdmi inputs.
HDMI upscaling means it scales the resolution, over HDMI, usually when transcoding an analog signal.
It will not effect audio.
Example: DVD player outputting 480p to receiver over component.
The receiver would transcode the analog component signal, and output it over HDMI. Without scaling, it remains output at 480p. With scaling, it could output at up to 1080p. Whether the processing does a good job is another question. Also factor in the TV also scales the image to the native resolution.
If you have a TV that doesn't have a native resolution matching the already scaled resolution, then all sorts of artifacts may be introduced due to excessive scaling.
Example: 480p component to 1080p HDMI to 1366p TV