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ADV7180WBSTZ Datasheet(PDF) 73 Page - Analog Devices

Part # ADV7180WBSTZ
Description  10-Bit, 4횞 Oversampling SDTV Video Decoder
PDF  120 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

ADV7180WBSTZ Datasheet(HTML) 73 Page - Analog Devices

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Data Sheet
ADV7180
Rev. G | Page 73 of 120
Table 96. 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
closed caption
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
closed caption
12
285 (22)
GDECEL[12]
Gemstar
13
286 (23)
GDECEL[13]
Gemstar
14
287 (24)
GDECEL[14]
Gemstar
15
288 (25)
GDECEL[15]
Gemstar
GDECOL[15:0], Gemstar Decoding Odd Lines,
Address 0x4A[7:0], Address 0x4B[7:0]
The 16 bits of GDECOL[15:0] form a collection of 16 individual
line decode enable signals. See Table 96 and Table 97.
To retrieve closed caption data services on NTSC (Line 21),
GDECOL[11] must be set.
To retrieve closed caption data services on PAL (Line 22),
GDECOL[14] must be set.
The default value of GDECOL[15:0] is 0x0000. This setting
instructs the decoder not to attempt to decode Gemstar or CCAP
data from any line in the odd field. The user should only enable
Gemstar slicing on lines where VBI data is expected.
GDECAD, Gemstar Decode Ancillary Data Format,
Address 0x4C[0]
The decoded data from Gemstar-compatible transmissions or
closed caption-compatible transmissions is inserted into the
horizontal blanking period of the respective line of video. A
potential problem can arise if the retrieved data bytes have a
value of 0x00 or 0xFF. In an ITU-R BT.656-compatible data
stream, these values are reserved and used only to form a fixed
preamble. The GDECAD bit allows the data to be inserted into
the horizontal blanking period in two ways:
•
Insert all data straight into the data stream, even the
reserved values of 0x00 and 0xFF, if they occur. This may
violate output data format specification ITU-R BT.1364.
•
Split all data into nibbles and insert the half-bytes over
double the number of cycles in a 4-bit format.
When GDECAD is 0 (default), the data is split into half-bytes
and inserted.
When GDECAD is 1, the data is output straight into the data
stream in 8-bit format.
Table 97. PAL Line Enable Bits and Line Numbering
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]
Closed caption
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]
Closed caption
11
336 (23)
GDECEL[15]
Not valid



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