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50 Hz
- The field rate, which is 50 Hz, is sometimes included when identifying the video mode, i.e. 576i50; another notation, endorsed by both the International Telecommunication Union in BT.601 and SMPTE in SMPTE 259M, includes the frame rate, as in 576i/25.
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What does 576 I mean?
The field rate, which is 50 Hz, is sometimes included when identifying the video mode, i.e. 576i50; another notation, endorsed by both the International Telecommunication Union in BT.601 [2] and SMPTE in SMPTE 259M, includes the frame rate, as in 576i/25 .
Mar 11, 2008 · Actually found this from the BBC ->. In general UK produced video is shot with a field rate of 50 Hz (50i) where the two fields in a frame. are 20ms apart, whilst programmes shot on film or shot to look like film will have a field rate of 25. Hz (or 25p) where both fields in a frame are time coincident.
This can lead to confusion, because industry-standard SMPTE timecode formats always deal with frame rate, not field rate. To avoid confusion, SMPTE and EBU always use frame rate to specify interlaced formats, e.g., 480i60 is 480i/30, 576i50 is 576i/25, and 1080i50 is 1080i/25.
The field rate, which is 50 Hz, is sometimes included when identifying the video mode, i.e. 576i50 ; another notation, endorsed by EBU/SMPTE, includes the frame rate, as in 576i/25 . Its basic parameters common to both analogue and digital implementations are: 576 scan lines or vertical pixels of picture content, 25 frames (giving 50 fields ...
Feb 18, 2011 · When an HD format is interlaced, the number generally describes field rate (1080i60 would describe 60 fields per second). • When an HD format is progressive, the number generally describes frame rate (720p60 would be 60 frames per second). The interesting thing is that field can describe frame too!
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One frame (takes 1/25th of a second) is in fact displayed as two fields (50 per second). One field displays the even lines the second one the odd lines of the single frame. The full name of the resolution including the field rate is 576i50 or 576i/25 when referring to the frame rate.
576 identifies a vertical line count of 576 and the i identifies it as an interlaced resolution. [1] The refresh rate, 50 Hz, is sometimes including when finding out the video mode, i.e. 576i50; another notation is the frame rate, endorsed by both the International telecommunications Union in BT.601 and SMPTE in SMPTE 259M to make it 576i/25 .
