Datasheet

ADV7188
Rev. A | Page 75 of 112
To retrieve closed caption data services on PAL (Line 335),
GDECEL [14] must be set.
The default value of GDECEL [15:0] is 0x0000. This setting
instructs the decoder not to attempt to decode Gemstar or CC
data from any line in the even field. The user should only enable
Gemstar slicing on lines where VBI data is expected.
Table 94. NTSC Line Enable Bits and
Corresponding Line Numbering
line [3:0]
Line Number
(ITU-R BT.470)
Enable Bit Comment
0 10 GDECOL [0] Gemstar
1 11 GDECOL [1] Gemstar
2 12 GDECOL [2] Gemstar
3 13 GDECOL [3] Gemstar
4 14 GDECOL [4] Gemstar
5 15 GDECOL [5] Gemstar
6 16 GDECOL [6] Gemstar
7 17 GDECOL [7] Gemstar
8 18 GDECOL [8] Gemstar
9 19 GDECOL [9] Gemstar
10 20 GDECOL [10] Gemstar
11 21 GDECOL [11] Gemstar or CC
12 22 GDECOL [12] Gemstar
13 23 GDECOL [13] Gemstar
14 24 GDECOL [14] Gemstar
15 25 GDECOL [15] Gemstar
0 273 (10) GDECEL [0] Gemstar
1 274 (11) GDECEL [1] Gemstar
2 275 (12) GDECEL [2] Gemstar
3 276 (13) GDECEL [3] Gemstar
4 277 (14) GDECEL [4] Gemstar
5 278 (15) GDECEL [5] Gemstar
6 279 (16) GDECEL [6] Gemstar
7 280 (17) GDECEL [7] Gemstar
8 281 (18) GDECEL [8] Gemstar
9 282 (19) GDECEL [9] Gemstar
10 283 (20) GDECEL [10] Gemstar
11 284 (21) GDECEL [11] Gemstar or CC
12 285 (22) GDECEL [12] Gemstar
13 286 (23) GDECEL [13] Gemstar
14 287 (24) GDECEL [14] Gemstar
15 288 (25) GDECEL [15] Gemstar
Table 95. PAL Line Enable Bits and
Corresponding Line Numbering
1
Line [3:0]
Line Number
(ITU-R BT.470)
Enable Bit Comment
12 8 GDECOL [0] Not valid
13 9 GDECOL [1] Not valid
14 10 GDECOL [2] Not valid
15 11 GDECOL [3] Not valid
0 12 GDECOL [4] Not valid
1 13 GDECOL [5] Not valid
2 14 GDECOL [6] Not valid
3 15 GDECOL [7] Not valid
4 16 GDECOL [8] Not valid
5 17 GDECOL [9] Not valid
6 18 GDECOL [10] Not valid
7 19 GDECOL [11] Not valid
8 20 GDECOL [12] Not valid
9 21 GDECOL [13] Not valid
10 22 GDECOL [14] CC
11 23 GDECOL [15] Not valid
12 321 (8) GDECEL [0] Not valid
13 322 (9) GDECEL [1] Not valid
14 323 (10) GDECEL [2] Not valid
15 324 (11) GDECEL [3] Not valid
0 325 (12) GDECEL [4] Not valid
1 326 (13) GDECEL [5] Not valid
2 327 (14) GDECEL [6] Not valid
3 328 (15) GDECEL [7] Not valid
4 329 (16) GDECEL [8] Not valid
5 330 (17) GDECEL [9] Not valid
6 331 (18) GDECEL [10] Not valid
7 332 (19) GDECEL [11] Not valid
8 333 (20) GDECEL [12] Not valid
9 334 (21) GDECEL [13] Not valid
10 335 (22) GDECEL [14] CC
11 336 (23) GDECEL [15] Not valid
1
As indicated by the bold rows, two standards can use the same line for VBI
data.