I was thinking, if there are current limits on video and audio quality of DVD's due to storage space on the disc, why not put the audio and video on two separate discs? It would require a player that could simultaneously play two DVD's. I would image there should be a way to encode a sync sequence on the discs to coordinate the audio and video discs. The only up front cost of this system would be the two disc players. But it would allow less compression of both the video and audio and still be produced on 5" discs.