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help in video processing

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hiiii ,

i want to make avideo player on tv (pal/ntsc ) signal.

and i will use 180mhz arm9 from atmel processor.

i want a ic chip that can convert from (digital rgb to pal or ntsc and vertical/horizontal sync)

video.GIF
 
Last edited:

thank you but arm at91sam9260 at 180 mhz are enough to make vedio player ?
or i need more speed?
 

Hi;
Standart Definition (SD) CVBS signal occupy around 8Mhz bandwidth. So considering Nyquist criteria you should at least put 16Msampes/sec. And it is generally advised to do 2xover sampling to make filtering easier and better video quality. Have a look at these also;
https://www.analog.com/static/imported-files/application_notes/7378546AN_944.pdf
Book: Keith, Jack. 2005. Video Demystified

I think ARM speed should be enough.
By the way how do you plan to generate video, you read video files from USB or smthng like that?
 
i will read the video file from "mmc" and process it with arm9 180mhz and generate pal/ntsc video signal.

i now want to get information about video file format and the easiest file format.
 

Actaully i have not much experience on video formats and decoding.:sad: For baseband video i have some info.
But i think you will need an MPEG decoder on arm at the end. I am not sure how it is possible decoding MPEG using only sw staff without any dedicated hw block.
Some experts should comment on it.
 
thank youu emresel

I did not know "mpeg vedio file format" of this complexity
 

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