Frame shutter mode

Frame shutter mode, also known as progressive shutter mode is the name that Sony came up with after it developed a progressive-scan CCD for video cameras. This mode allows full-frame acquisition with conventional interlaced field output. In Frame Shutter Mode, a camera acquires 30 (NTSC) or 25 (PAL) independent images per second. These images are output as 60 (NTSC) or 50 (PAL) interlaced fields. The result is a progressive-scan signal, which is also compatible with traditional interlaced scanning systems.

Frame shutter mode vs. Progressive segmented frame

Frame shutter mode is conceptually identical to Progressive segmented frame (PsF). The difference is that "PsF" is an industry term used in regards to high definition video, while "Frame Shutter Mode" is a trademark used by Sony for its standard definition products.

Usage of frame shutter mode in consumer products

Sony used Frame Shutter Mode, renamed simply to progressive recording, in several consumer products. For example, the DCR-HC96 camcorder is capable of shooting in 30p progressive mode; its European cousin, the DCR-HC96E, has matching 25p progressive mode.

Here is how the progressive recording mode is described in the DCR-HC96 User's Guide:

"You can reduce image blur when recording moving pictures on tapes, intended for import to your computer as still images, by setting "Progressive Recording" to "On" (30p)."

"In a normal TV broadcast, the screen is divided into 2 finer fields and these are displayed in turn, every 1/60 of a second. Thus, the actual picture displayed in an instant covers only half of the apparent picture area. In progressive recording, the picture is fully displayed with all the pixels. A picture recorded in this mode appears clearer, but a moving subject may appear awkward."

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