Progressive Scan...

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please explain this DVD player feature in lay mans terms.

Ta

[jake-the-peg]

Most tube (rather than lcd plasmaetc) TVs use interlacing.

That means they display one line on the screen miss a line do the third miss one then then fifth etc. then they come back and do the even rows.

Sounds mad but it goes back to when the technology was not up to much.

Progressive scan or non-interlaced does each row in turn and will give a slightly less flickery image.

A DVD player with this feature can send a progressive scan image to a TV that can display a progressive scan picture.

http://en.wikipedia.org/wiki/Interlace for more info and diagrams

[rojash]

For historical (technical) reasons TVs normally use a scan method called interlacing. The raster starts at the top of the screen and scans horizontally every odd line, then shoots up to line two and scans every even line. The reason is that this gives an effective frame rate of twice the actually scan rate. With modern electronics its very easy to scan each line successively. This is termed progressive scan and gives a better, less jittery picture.

[rojash]

Sorry JTP I was typing while you were posting!

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thanks guys!