This will depend on the Blue ray player and other equipment. For a direct connection to the receiver, if your player has either type of digital audio output (coaxial or optical), get the appropriate cables. Then connect the chosen cable between the Blue ray player and the receiver. Connect the Blue ray player to the TV with an HDMI cable. See page 10 of the manual, available at http://pdfstream.manualsonline.com/6/69f43064-f593-49b8-8d4a-23174b496e65.pdf
, to see the connections for the audio sources. (I'll assume your Blue ray player doesn't have component video out or you would use the component audio to the receiver.)
If your player doesn't have a digital audio output, check your TV audio output. You can get the same result by sending the videos via HDMI to the TV and using the TV audio out to the receiver. Set the audio source to TV and leave it there for both TV and Blue ray and DVD videos. (Sometimes there could be a slight delay in the audio compared with the video signal when you do this. I've never noticed it with my Blue ray player signal going to the TV and the TV digital audio out to the Denon receiver.)
If you can't send the audio out to the receiver from either your Blue ray player or TV, then you will need some sort of HDMI audio extractor. You can find models with Analog Audio Out, Digital Audio Out or both. ( https://www.amazon.com/J-Tech-Digital-Extractor-Converter-JTDAT5CH/dp/B00BIQER0E
lists units with both types of audio output. One models requires a 3.5 mm to RCA audio adapter.)
I hope this helps.