Any ideas how HD-DVD playback is achieved in the Toshiba laptop?
The new WinDVD is a totally self contained application with NO external interfaces. Encryped data flows across the bus from the HD-DVD drive to the WinDVD executable and the executable sends screen buffers to the video card after validating that there is only a digital connection between the video card and the display. I am not sure how the HDMI handshaking would be performed, though. I am thinking that this player will require a video card with an HDMI HDCP enabled port.
Very different from the MS DX9 model which is modular and allows anyone to substitute their own navigator code, video decoder code, audio decoder code, postprocessing code, video renderer and/or audio renderer. This model makes it simple to capture the video and audio at any one of a number of published interface connections.
The downside of the WinDVD / PowerDVD integrated player means no aspect ratio control, no variable blanking, and no adjustable scaling unless code to perform these functions has been included in the WinDVD executable.
PowerDVD is likely doing the exact same thing.