The audio output of the TV has to be connected to the Samsung HTS. How you do that depends on what outputs your TV has and what input the Samsung has.
If both the TV and Samsung have HDMI-ARC then you just need to turn ARC on in the TV menu. That will send audio from the TV into the HTS over the same HDMI cable that sends video from the BD player to the TV. You have to use the HDMI-ARC input on the TV as well.