PAL and NTSC timing information

Horizonal Timing

                         PAL         NTSC 
A (us)                   64
B (us)                   4.7+-0.2    4.7+-0.1
C (us)                   ?           1.4
D (us)                   52
E (us)                   12

Horiz. Frequency (Hz)    15625       15734.2
Subcarr. frequency (MHz) 4.43        3.579545  
Subcarr. cycles per line ?           227.5



XXX        XXXXXXXXXXXXXXXXXXXXXX        XXXXX
XXX_   _W__XXXXXXXXXXXXXXXXXXXXXX_    _W_XXXXX
    |_|        VIDEO              |_|
    |B|    |---------D----------|C|
                                |----E---|
    |--------------A--------------|

Vertical Timing

                       PAL
Vertical frequency(Hz) 50      59.94
Blanking (lines)       25-37
Active lines                   482-486
Total lines            625     525

Equalization pulses            3+3+3
 
O (scanlines)           312.5    262.5
P (ms)
Q (ms)
R (scanlines)                  241-243
S (ms)

XXX       XXXXXXXXXXXXXXXXXXXXXX      XXXXX
XXX_   ___XXXXXXXXXXXXXXXXXXXXXX_   __XXXXX
    |_|       VIDEO              |_|
    |P|-Q-|---------R----------|S|
                               |---T--|
    |--------------O-------------|