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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.
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) per ...
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What is a 50 Hz field rate?
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What does 576 I mean?
Mar 11, 2008 · 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. In the case of 25p material the whole. frame can be coded as a complete picture, whereas the 50i frame will contain combing artefacts on.
Bits 1–0: Vertical rate offsets: 00 = none; 10 = +255 Hz for max. rate; 11 = +255 Hz for max. and min. rates. 5: Minimum: vertical field rate (1–255 Hz; 256–510 Hz, if offset). 6: Maximum 7: Minimum: horizontal line rate (1–255 kHz; 256–510 kHz, if offset). 8: Maximum 9: Maximum pixel clock rate, rounded up to 10 MHz multiple (10 ...
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 .
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. This convention assumes that one complete frame in an interlaced signal consists of two fields in sequence.
Feb 18, 2011 · In HD video, frame rate and field rate are often used interchangeably and it can be hard to tell what someone is talking about. Here is an easy way to think of it. When an HD format is interlaced, the number generally describes field rate (1080i60 would describe 60 fields per second).
