Sorry, but no. You will not be able to stream audio from your Samsung Blu Ray player to the AirPort Express.
Streaming to the Express is accomplished using AirPlay and requires three things to be successful:
- An iTunes server. Typically this would be a PC or Mac hosting iTunes or it can be an iTunes server service on a NAS device.
- A wired or wireless network.
- An AirPlay "speaker." This could be the AirPort Express.
In order for the Samsung to stream to the Express it would have to have a built-in iTunes server.