PAL & NTSC Composite Video Timings

[underwurlde]

PAL & NTSC Composite Video Timings

Yo!

I am trying to find the electrical timing Video Standards for both NTSC & PAL video. A lot of stuff out there on the 'net for NTSC, not much for PAL and none of them seem to cover everything !

Please can someone confirm horizontal timings for composite video signals:

Total: PAL = 64uS NTSC = 63.5uS
Active Picture Region: PAL = 52uS, NTSC = 52.6uS
Horizontal Blanking Period: PAL = 12uS, NTSC = 10.9us, consisting of:
Front Porch: PAL = 1.5uS?, NTSC = 1.5uS
H Sync: PAL = NTSC = 4.7uS
Back Porch: PAL = 5.8uS?, NTSC = 4.7uS, Consisting of:
BreezeAway: PAL = 0.6uS? NTSC = 0.6uS
Colour Burst: PAL = 2.5uS? NTSC = 2.5uS

Cheers,

Andy

 

[dhaen]

An externally hosted image should be here but it was not working when we last tested it.

 

[underwurlde]

Thanks

Thanks m8!

That's exactly what I'm after! 🙂

NTSC anyone.

 

[dhaen]

NTSC spec's changed with the RS170A revision (tightened specs).
I think I only have pre RS170A.


BTW Who's m8?

 

[dhaen]

NTSC

An externally hosted image should be here but it was not working when we last tested it.

 

[dhaen]

NB On both systems the horizontal datum is the negative transition of h-sync.
On PAL the horizontal blanking is measured at 50% as would be any pulse, but that's not true on NTSC where it's measured at 15 or 20 IRE (I forget exactly).
(1 IRE is 7.14 mV)

 

[dhaen]

RS170a link

RS170a

 

[underwurlde]

Thanks again dhaen

Andy

BTW m8, as in 'mate'! 😉