How does LCD know when to deinterlace?

[Episodio1]

I have DVDPlayer connected through composite to the LCD TV. I

How does the TV know if the signal is interlaced or not?


Thanks.

[scharfis_brain]

video signals such as composite or S-Video are always interlaced. Even if its content is progressive film.

most displays are always doing deinterlace to ensure motion smoothness at every cost.

But some more advanced displays are able to detect PAL-Film (2:2 Pulldown) and NTSC-Film (3:2 Pulldown). This is called the "Movie Mode" sometimes. In this mode these displys disable the deinterlacing when they detect Film sources.

And please: Don't use composite to connect DVD -> LCD.
It is the worst quality you can get.
Use the SCART connector with a full conducted 21-pin SCART-cable.
Also enable 16x9 Widescreen and RGB in the setup menue of your DVD-Player.

You'll get a stunning gain in image quality.

[Episodio1]

Sorry, I mixed 'composite' with 'component'. I have my DVD player connected through Y-Cb-Cr (I guess this is 'by component'), which is the conection needed to activate 'progressive scan' in my PAL DVD player.

If i recall correctly, when I used RGB the image was fucked up.

I'll try to use scart.

[scharfis_brain]

If you tell the DVD-Player to put out progressive signals, the DVD-Player will do the deinterlacing. The LCD won't.

[SeeMoreDigital]

And please: Don't use composite to connect DVD -> LCD.
It is the worst quality you can get.
Use the SCART connector with a full conducted 21-pin SCART-cable.
Also enable 16x9 Widescreen and RGB in the setup menue of your DVD-Player.

You'll get a stunning gain in image quality.Agreed... but sadly it will still be interlaced...

EDIT: Episodio1
I take it your DVD player can output "progressive" images!?

[Episodio1]

"I take it your DVD player can output "progressive" images!?"

Emmm... that's what I said. ¬_¬

Let's ask in other way... what does the button 'PROG SCAN' stand for?

[Blue_MiSfit]

It means the DVD player is doing the deinterlacing / pulldown, to output 24p (if you're in NTSC land of course). This means your progressive-enabled display (LCD) gets a progressive signal, which means you see a progressive-scanned image.

If you had it turned on, and were trying to feed an interlaced only TV etc, you would have image problems. This explains the button, instead of an "always on" feature

I think... stop me if I'm wrong.

~MiSfit

[striker9]

If you had it turned on, and were trying to feed an interlaced only TV etc, you would have image problems. This explains the button, instead of an "always on" feature

Since I've never heard of an interlaced LCD I don't think that would be a problem. :sly:

[Episodio1]

Thank you, bluemisfit! :D