AK8813 Datasheet, PDF (29/51 Pages) Asahi Kasei Microsystems – NTSC/PAL Digital Video Encoder

ASAHIKASEI
[AK8813/14]
♦ Synchronizing Signal and Burst Waveform
(1-1) NTSC / NTSC-4.43 / PAL-M( Video Process 1 Register [VM3:VM2]-bit = 00 / 01 ) (SMPTE-170M)
90%
H o rizo n ta l B la n k in g ris e tim e
50%
B u rs t E n v e lo p e
ris e tim e
10%
H o rizo n ta l
re fe re n ce p o in t
90%
50%
10%
H b la n k in g s ta rt
to H -re fere nce
S yn c ris e tim e
90%
10%
B u rs t H e ig h t
50%
B urst
S ync Level
S ync
H . re f. to B u rs t Sta rt
H re fe re n c e to B la n k in g E n d
Fig. 15 Synchronizing Signal and Burst Waveform
Total line period(derived)
Sync Level
Horizontal Blanking rise time
Sync rise time
Burst envelope rise time
H-Blanking start to H-reference
Horizontal Sync
Horizontal reference point to
burst start
H reference to H-blanking end
Burst
Burst Height *
measurement
point
10% - 90%
10% - 90%
10% - 90%
50%
50%
50%
50%
50%
* Burst height of PAL-M is 306mV
19 cycles +/-10°
9 cycles
value
63.556
40
140
140
300
1.5
4.7
19
9.2
9
40
Recommended
tolerance
+/- 1
+/- 20
+/- 20
+200 -100
+/- 0.1
+/- 0.1
defined by SC/H
+ 0.2 –0.1
+/- 1
+/- 1
50%
units
usec
IRE
nsec
nsec
nsec
usec
usec
cycles
usec
cycles
IRE
50%
Fig. 16 Synchoronizing Signal and Burst Waveform(NTSC)
Rev.00
- 30 -
2004/Oct