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Originally Posted by Glenn Chan
As far as I know...
Terrestrial broadcasting will likely stay 1080i + 720p.
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Maybe, but I think the real move is towards it as a production standard. Obviously it will downconvert well to both 1080i/25 and 720p/50, and remains the best possible quality in all respects for the future.
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2- With AVC compression, 1080p50/60 may deliver slightly better quality at the same bitrates. (I've not seen this for myself.).
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Not sure - what I have heard is that the compressed for transmission quality is a lot less than twice what's needed for 720p/1080i, contrary to what may be expected.
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3- From a production standpoint, most facilities are wired for 1080i/720p. The higher bandwidth of 1080p60 requires 3gbps cabling.
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Yes, but it can work with doubling up, using two standard cables to carry it. (When each carries an independent, but mirror image 1080i version. Lose either cable and you still have a complete 1080i signal.) Conceivably, the HD-SDI spec could be extended to allow for 2:1 compression, to get 1080p/50 down a single, standard cable?