-
LP Vs SP in HD
IS there a quality difference between DVCPRO HD “LP” and DVCPRO HD “SP” ??????
So if you dub from LP to SP for the sake of the format, do you loose quality if your original project was transfered to LP first??Thanks
-
2 Replies
-
First off, there is no “dubbing” in digital. When you make copies you “clone” them. Because the signal is all zeros and ones there is no loss of quality per se when you clone; loss of quality comes by decompresing and recompressing. This means “cloning” by firewire rather than by HD-SDI, this way you’ll also carry the embedded audio, time code and flag frames in user bit (as long as the menus are set correctly).
As regards the LP vs. SP, the 1200/1400 decks and the HDX900 camera have different heads than the Varicam and previous DVCPRO100 VTR’s. They are a smaller 9 micron head gap vs. 18 micron. It’s doubtful that there is any difference in the recording quality although you do benefit by the tape lasting twice as long. In the long run, it’s logical to think that there might be more head clog issues with the smaller gap, and to some extent I have experienced this with the 1200A VTR when mine was new, although recently this has not been the case.
-
John, enlighten me.
I have never heard anyone mention SP or LP regarding DVCPro100 in our little pool of post houses.
I am familiar, the hard way, with the different head gap width between our 1400 and 1200A compared to our original 130DC deck and our Varicam.
I have also heard of our 1400 and 1200a refered to as a DVCPro100EX.
When would I experience the SP or LP? Is this a dialog that I might hear on the Coast?
Ray Palmer, Engineer
Salt River Project
Phoenix, AZ
602-236-8224 office
There are three types of people in this world, those that can count and those that can’t.
Reply to this Discussion! Login or Sign Up