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Looking for PAL to NTSC converter for TV schematics

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zk543g

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PAL-> NTSC Converter?

hello?

i need pal -> ntsc converter for tv schematic?

please help me!

thank you.
 

edf

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I am pretty sure PHILLIPS or SIGNETICS offered some IC's for these formats. Demodulation cicuit followed by modulation circuit would be the answer. Do a search on their website for application notes.
 

TurboPC

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edf said:
I am pretty sure PHILLIPS or SIGNETICS offered some IC's for these formats. Demodulation cicuit followed by modulation circuit would be the answer. Do a search on their website for application notes.
zk543g: Remember our last discussion on the topic:

its demodulation, followed by resizing, followed by frame rate conversion and then followed by modulation. It's a big achievement...

Agilsan is supposed to keep us informed of a device he found...
 

ted

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There are some quick-and-dirty ways used by among others some VCRs, where the frame rate is NOT converted. I have for instance a (European = PAL) Thomson VCR which can play back NTSC tapes, and produces something called "PAL60" - where the coding is PAL and the frame rate is 60 Hz (like NTSC).

Many TVs seem to manage that -- either as is or after minor adjustment of vertical lock.

There may be chips capable of that kind of conversion, and definitely the task is MUCH simpler. I have not researched the details, but it might be worth looking at.

Good luck,
ted
 

TurboPC

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I agree with ted, there are very 'crude' ways to do it:

1- clip the resolution instead of resizing
2- repeat 1 image every 5 images to obtain the 60Hz frame rate

There is surely a chip somewhere that does that. Anybody knows?

In the meantime, here's a link to an e-book that covers the full subject. Be prepared for a math course... :lol:

http://www.elektroda.pl/eboard/viewtopic.php?t=35115&highlight=
 

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