Question about conversion of video from analog to digital

[suwaii]

video pic adc

i use pic microcontroller to convert video analog to digital and i interrupt the pic

after few second then i continoue conversion ... so that after interrupt finished the

video signal will start conversion from beging line#1 or start from it stop......

 

[jcdup]

Re: video pic adc

Hi suwaii,

I'm not sure what your question is.

Cheers

Johann

 

[KST]

Re: video pic adc

ADC video with ADC of PIC ???
I know that bandwidth of video is 6.5 MHz (NTSC). If you ADC it, you need ADC has got sample >= 13 Msps . . . . ADC of PIC has got sample = 200 Kbps !
. . . . . . .
Good luck for U !

 

[suwaii]

Re: video pic adc

i will rewrite again :

since we can not measure high speed data direct to parallel port and
without using FIFO memory assume we want to convert the video analog signal

to digital and the convertion store in SRAM so that we have to stop analog video

signal to give PC parallel port time to read the digital video that store in SRAM

how we can stop video signal and if we stop ADC chip conversion will video

signal stop and after ADC chip continue conversion will video signal continue from

where it stop or start from begining line#1 of picture