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Old October 13th, 2003, 01:26 PM   #1
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Location: Portland, Oregon
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Progressive vs. Interlace

I've been skimming through the threads concerning the GS100 to learn more, as I recently purchased the MX500 (which is the 953 in PAL), and I haven't quite been able to determine from what was written here if the new GS100 shoots progressive. In other words, when the GS100 is in Frame Mode, does it actually shoot 30p or is it 30i? That seems a peculiar marketing decision on Panasonic's part to relase a camera that shoots progressive which is significantly cheaper than the DVX100.

Additionally, does the GS100 shoot in native 16:9 without squashing the square pixels, or does it require a 16:9 adapter?

I appologize if I'm being redundant to other threads, but I'm new. Hope you can help.
Christopher Patton is offline   Reply With Quote
Old October 13th, 2003, 03:31 PM   #2
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Hey Chris, I'm just researching those issues last few weeks being a fresh new owner of GS100 (have it about a month or so).
Lately I got quite deeply into Wide and Frame mode study, few dasy ago conducted a brief test just watching the cam output (not recorded, just AV output) on Toshiba native 16x9 33" (or more, not sure) TV. I switched over between regular 4x3 interlaced, Wide interlaced Wide + Frame and Pro Cinema.

First of all, just to answer your questions:
1. Wide mode - there is an impact into vertical resolution. This is not pure 16x9 while entire NTSC vertical resolution is preserved (480 lines), but rather the image is cut off at the upper and lower part noticeably and a few more pixels are added at the sides making 16x9 proportions. To be fair, horizontal resolution is indeed inceased (looking light slightly wider angle coverign some parts of the image that were not presented in 4x3), but vertical loss is more noticeable, for my opinion.
In regular situation (especailly shooting in size-restricted areas such as indoors) I would hesitate at all switching to wide.

2. Progressive - oh this is whole lot of thigs to be clarified. First of all this is NOT a true progressive mode, but rather something that might be considered as a mid-point between interlaced and progresive. There is an excellent article coverign the differences from technical standpoint I pointed in my recent posting:

read the article thoroughly to gain the understanding or major differences between two modes. At the end, you will realise that the camera records two iidentical fields following the processing on each as described there, i.e. teh frame is still constructed from two fields but that are inedtical to each other.

The algorithmical part of teh processing have yet settled well in my head and still need to be clarified, so I'll be erading it over and over again until it will become brushed up well. :-)

Also, read through the threads here, just a few recent rasing your questions and there are a debates ...

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