When your audio is connected via HDMI through the receiver it will not show DD or DTS, it should show PCM. This same thing confused me when I first changed to HDMI, so no worries, you are getting the correct sound formats although your receiver shows PCM, what is happening is your DVD player is decoding the audio signal prior to it getting to the receiver. If you are using an optical cable on another device the receiver will show DTS or DD depending on the sound format.