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Re: When will Manuf. offer 1080p I/Os on HD DVD-Players/TVs
Paul, You should stop confusing the 1080 storage and display formats of HD DVD and BD with the 1080 transport format on the wire.
Even Sony's professional cameras and equipment use an INTERLACED format on the wire. In fact 24PsF is very popular in production studios simply because it can ride the same infrastuture as the standard 60I HD signal. Yes, 1080 24PsF is actually an INTERLACED transport between devices. The fact that the transport is interlaced in no way degrades the final progressive display as long as the two fields represent the same frame of the source and were sampled at the same time. This is, in fact exactly how both BD and HD DVD work. The data is stored as a progressive frame and the player has the option of splitting the odd and even lines of that frame and outputting them as two fields. One field contains the odd lines and the other contains the even lines. In other words, an interlaced signal on the wire.
The player can also do field repeat processing to deliver a 60I fields from the original frame stored on the disc. Properly processing either of these interlaced transports to recreate the progressive frame in the display device is a trivial exercise than can be performed with no loss of resolution or detail, and without creating any artifacts.
The key to this seemless reconstruction of the frame is that both fields have to come from the same frame and or have been captured at the same time.
Obviously, sports and other 60I sourced video cannot take advantage of this, because the two fields that make up a frame have a temporal displacement from each other that leads to combing and other artifacts when being combined into a frame with a simple weave.
But, when it comes to film or video sourced from professional cameras like the Cine Alta used for SW Ep I, the original source is clearly progressive, which allows interlaced transports to be used without ill effects (assuming that the display device wasn't designed by some brain dead designer who decided to convert 1080I to 540P by bobbing, rather than using a clean simple weave).
Ted
Last edited by TedD : 06-05-2006 at 09:21 PM.
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