AK8817_06 Datasheet, PDF (26/44 Pages) Asahi Kasei Microsystems – NTSC/PAL Digital Video Encoder

ASAHI KASEI
( 1-1 ) EAV / SAV Code and Line Synchronization
The AK8817 makes Vertical synchronization ( Line synchronization ) when F-bit in EAV makes transition from
“ 1 “ to “ 0 “.
[AK8817]
F-bit of EAV / SAV and Line relation is as follows
F-bit
NTSC
PAL
0
Line4 – Line265
Line1 – Line312
1
Line266 – Line525
Line1 – Line3
Line313 – Line625
For reference, V-bit of EAV / SAV and Line relation is also shown below.
Field
V-bit
NTSC
PAL
Field 1
Start (V=1)
End (V=0)
Line1 – Line19
Line20 – Line263
Line624 – Line625 – Line22
Line23 – Line310
Field 2
Start (V=1)
End (V=0)
Line264 – Line282
Line283 – Line525
Line311 – Line335
Line336 – Line623
1
2
3
4
5
6
7
8
9
Digital
Line-No.
F-bit
synchronization is made at this timing
Digital
Line-No.
263 264
265
266
267
268
269
270
271
272
F-bit
Line Synchronization by EAV at NTSC input case
Digital
Line-No.
F-bit
Digital
Line-No.
F-bit
622
623
624
625
1
2
3
4
5
6
synchronization is made at this timing
310
311
312
313
314
315
316
317
318
319
Line Synchronization by EAV at PAL input
MS0413-E-03
26
2006 / 05