When is multi-region NOT multi-region?

Presumably the former is PAL-M as used in Brazil, but where is (was?) NTSC 625 / 50Hz ?

Reply to
The Other Mike
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Or the similar mode sometimes called 'NTSC 4.43' - i.e. a hybrid of

525/60 scan rate and PAL subcarrier frequency - used on VCRs (and possibly DVD players?) to allow viewing of North American recordings in Europe, when using composite video or modulated RF output.

The converse of the above, presumably?

A lot of confusion arises because people use 'NTSC' and 'PAL' to refer to the most commonly associated scan rates, rather than the colo(u)r standard. You do have to unpack what is being said sometimes, to be clear about what is meant.

Reply to
Andy Wade

If you're going to be pedantic you should at least get your facts right.

Indeed PAL is a method of colour encoding, and strictly speaking says nothing about line or frame rates (although in practice we all know what it usually means).

However NTSC is *not* just a method of colour encoding, it specifies all aspects of the analogue TV system as defined by the National Television Standards Committee. Therefore NTSC *does* imply certain line and frame rates. The trouble is that there's no term available specifically to describe the colour encoding method that NTSC uses, so colloquially we use phrases like '405-line NTSC', which is strictly meaningless, in such situations.

Richard.

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Reply to
Richard Russell

Note that your fps above refers to fields, not frames (as the picture is interlaced).

Most players will just output at the relevant frame rate and leave the display to deal with decoding it. Even the last couple of generations of CRT TVs could usually handle any standard input signal. Some DVD players will output a "PAL60" signal which is a non-standard 60hz 525 line picture but with PAL colour subcarrier rather than NTSC (PAL was a better quality system than NTSC).

Some modern players of course output upscaled pictures over HDMI or component video, and some will output a 480p picture from an NTSC disc.

TV shows etc. recorded onto a DVD will typically have been shot originally in

50i (PAL) or 60i (NTSC). But movies are typically shown at 24 frames per sec at the cinema.

When movies are shown on the 50Hz PAL system (either broadcast or on DVD), they are usually sped up to 25 frames per second, to fit in with the PAL frame rate. This results in slightly higher-pitch sound and a slightly shorter run-time.

But on NTSC DVDs movies are typically recorded at 24frames per second and the player will insert additional frames to be able to output a 30 frames per second (60Hz) NTSC interlace signal. This can cause significant motion judder.

Many modern TVs will accept a 24 frames per second progressive scan input, and upscaling DVD players will often have a 24 fps 1080p playback mode. In this mode, the DVD plays back at the original 24fps frame rate.

Reply to
2BSur2Bsur

I refer t my original reply. a lot of region ! dvd players will not handle PAL in any format. or region code. Gary

Reply to
Gary

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