[mdlug] Building a Linux PVR

[Ron Blanchett]

>----- Original Message ----
>From: Raymond McLaughlin <driveray at ameritech.net>
>To: MDLUG's Main discussion list <mdlug at mdlug.org>
>Sent: Friday, November 24, 2006 1:07:14 PM
>Subject: Re: [mdlug] Building a Linux PVR
>
>
>Maybe you can shine some light here. I had the impression that 'scan',
>progressive vs. interlace, was a CRT thing. With progressive meaning
>that the whole screen was repainted, line by line, top to bottom, by the
>electron gun with each pass. And interlaced essentially meant that every
>other horizontal line was painted with each pass, thus requiring two
>passes to repaint the whole screen.

>Is this over simplified to the point of being wrong, or just plain
>wrong, or what?

>In such a scheme how does a device like an LCD have a 'scan' pattern?
>Aren't all the pixels refreshed more or less simultaneously?




No you are not wrong at all. CRT are rated that way but the rating also still applies to
LCD, DLP, Plasma, etc TV's because they almost all refresh every pixel at once they are rated as
Progressive Scan. Yes it is a little misleading but when you are comparing TV's (or even monitors)
and the industry still uses the Scheme (I think there are even a few LCD, DLP, Plasma, etc TV that
are not Progressive Scan).

-Ron

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