TiVo : Incorrect Tivo Sound Description

[Wicked_and_Crazy]

I know most programmes on BBC 1 HD don't have Dolby D sound. However I've noticed since having Tivo most BBC 1 HD programmes on the info button say the sound is Dolby D. Despite selecting Dolby D sound my amp insist the sound is stereo.

---------- Post added at 21:24 ---------- Previous post was at 20:05 ----------

In addition if I switch the TiVo on and go to bbc 1 hd the sound according to my amp is stereo (mostly). If I then switch to discovery hd the sound according to my amp changes to Dolby D. When I then switch back to bbc 1 hd my amp says the sound is still Dolby D. If I switch the amp off and back on without touching the tivo my amp says the sound is stereo again.

[steveh]

Dolby Digital supports both stereo (2.0) and surround (5.1) sound. The programmes on most HD channels are in Dolby Digital but currently the stereo version is still more widely used than surround version.

[Wicked_and_Crazy]

Doesn't explain who the amp reports stereo from bbc 1 hd before switching to discovery HD and then Dolby d when you switch back. The sound signal isn't changing in those few seconds