This method also has the advantage that the placement of the receiver allows the pacing of the heart to be very precisely controlled, says Dr Echt.

ECONOMIST: Case history

Although you can't take advantage of advanced authored movies, the advantage to decoding in the AV receiver is that you usually have access to more advanced sound processing.

ENGADGET: How to actually use Dolby TrueHD and DTS-HD HD

While equipment varies, in most cases the only way to take advantage of the auto level and delay adjustments is to decode in the AV receiver.

ENGADGET: How to actually use Dolby TrueHD and DTS-HD HD

First, that its ViP622 DVR receiver will now be available for free as a part of the Digital Home Advantage Program.

ENGADGET: Dish Network pushes HD DVRs HD