What looks like excessive artifacting on a Plasma is in fact the pulse width modulation that it uses to generate all it's greyscale levels (really the plasma pixel is binary - on or off, so it needs to be modulated to produce different visible levels) interfering with movement in the image and the human visual system.

And you're right, 1080i60 should convert to 720p60 by splitting each field into a 540p60 frame, then upscaling to 720p. Given all modern displays are inherently progressive, 720p is displayed on a 1080p screen by simple upscaling.

Graeme

Sorry Guy - I misread your intent - I thought you were saying you couldn't fit a 2 hour movie on a BluRay disc at it's maximum data rate. I have since discovered that all the current BD movies are single layer? very strange decision.

Most computer media capacities are now expressed in decimal rather than binary amounts, and that's officially recognized as the modern standard. (Binary calculations are supposed to be expressed using a new set of terms approved in 1998: see http://en.wikipedia.org/wiki/Mebibyte.) A better question is what's the formatted capacity, and how full can you fill it before playback at the outer edge gets iffy? So let's say a single-layer Blu-ray disc holds ~24,000,000,000 bytes comfortably * 8 bits per byte = ~92 minutes at 36 Mbps or 128 minutes at 25 Mbps or 185 minutes at 18 Mbps. That sounds like plenty to me, and I'd rather not have to fuss with multi-layer discs.

Same here. While I have burnt a few DL DVD-Rs and they have worked, for a while anyway*, I have never used them to provide a finished video to a client.

*As feared even with Verbatim DL disks it doesn't take long for the same disk in the same player to start having playback problems. Its like after burning, the reflectivity steadily degrades for a while reducing compatibility with time. DL BR will need so time to convince me its a safe delivery format.

I was of course referring to multi-layer replicated commercial disks (movies) and not burnt disks. I thought Sony had already been using dual layer BD-R on XDCam? Maybe not.