AK8857VQ Datasheet, PDF (41/105 Pages) Asahi Kasei Microsystems – Dual Channel Digital Video Decoder

[AK8857VQ]
Input : 625-line, Horizontal line : 480-line, Output : Progressive (30frm/sec) (ODD field output)
620 621 622 623 624 625 1
2
3
4
5
6
7
89
Input
Video Signal
HD
HACT
DVALID
VD
VACT
FIELD
10
Input
Video Signal
HD
HACT
DVALID
VD
VACT
FIELD
21 22 23 24 25 26 27 28 29 30 31
306
AB CD
Input
307 308 309 310 311 312 313 314 315 316 317 318 319 320 321
Video Signal
HD
HACT
DVALID
VD
VACT
FIELD
322 277 334 335 336 337 338 339 340 341 342 343 344
619
Input
Video Signal
HD
HACT
DVALID
VD
VACT
FIELD
Because of line repeating process during progressive signal conversion, as shown in the above figure
A line and B line / C line and D line is output as the same signal. The FIELD signal is being toggle.
As shown in the figure above, start from line 25 to the next starting line of each 10 line, the line is
output as not active line. HACT and DVALID is “High” during the line mentioned.
EAV sync code is added to the line mentioned above and SAV sync code is not.
* In the above figure, both ODD/EVEN field line number is 478-line. To set the active line to 480-line,
set the VBIL[2:0] register value to 0x01.
MS1189-E-01
-41-
2010/12