adv7188 Analog Devices, Inc., adv7188 Datasheet - Page 74

• Manufacturer Part Number: adv7188
• Description: Multiformat Sdtv Video Decoder With Fast Switch Overlay Support
• Manufacturer: Analog Devices, Inc.

ADV7188
Table 92. PAL CC Data, Half-Byte Mode
Byte
0
1
2
3
4
5
6
7
8
9
10
1
Table 93. PAL CC Data, Full-Byte Mode
Byte
0
1
2
3
4
5
6
7
8
9
10
1
NTSC CC Data
Half-byte output mode is selected by setting GDECAD to 0; full-
byte mode is enabled by setting GDECAD to 1. See the GDECAD,
Gemstar Decode Ancillary Data Format, Address 0x4C [0]
section. The data packet formats are shown in Table 90 and
Table 91. Only closed caption data can be embedded in the output
data stream.
NTSC closed caption data is sliced on Line 21 on even and odd
fields. The corresponding enable bit must be set high. See the
GDECEL [15:0], Gemstar Decoding Even Lines, Address 0x48
[7:0], Address 0x49 [7:0] and the GDECOL [15:0], Gemstar
Decoding Odd Lines, Address 0x4A [7:0], Address 0x4B [7:0]
sections.
PAL CC Data
Half-byte output mode is selected by setting GDECAD to 0;
full-byte output mode is selected by setting GDECAD to 1.
See the GDECAD, Gemstar Decode Ancillary Data Format,
Address 0x4C [0] section. Table 92 and Table 93 list the bytes of
the data packet.
The bold values represent Gemstar- or CC-specific values.
The bold values represent Gemstar- or CC-specific values.
D [9]
0
1
1
0
EP
EP
EP
EP
EP
EP
CS [8]
D [9]
0
1
1
0
EP
EP
1
1
CS [8]
D [8]
0
1
1
1
EP
EP
EP
EP
EP
EP
CS [8]
D [8]
0
1
1
1
EP
EP
0
0
CS [8]
D [7]
0
1
1
0
EF
0
0
0
CS [7]
0
1
1
0
D [7]
0
EF
0
0
0
0
CS [7]
CCAP Word1 [7:0]
CCAP Word2 [7:0]
D [6]
0
1
1
1
0
0
0
0
CS [6]
0
1
1
1
0
0
0
0
0
0
CS [6]
1
D [6]
1
D [5]
0
1
1
0
1
0
0
0
CS [5]
D [5]
0
1
1
0
1
0
CS [5]
Rev. A | Page 74 of 112
D [4]
0
1
1
0
0
0
0
0
CS [4]
D [4]
0
1
1
0
0
0
CS [4]
CCAP Word1 [7:4]
CCAP Word1 [3:0]
CCAP Word2 [7:4]
CCAP Word2 [3:0]
0
1
1
0
1
0
0
0
D [3]
CS [3]
D [3]
0
1
1
0
1
0
CS [3]
PAL closed caption data is sliced from Line 22 and Line 335.
The corresponding enable bits must be set.
Only closed caption data can be embedded in the output data
stream. See the GDECEL [15:0], Gemstar Decoding Even Lines,
Address 0x48 [7:0], Address 0x49 [7:0] and the GDECOL
[15:0], Gemstar Decoding Odd Lines, Address 0x4A [7:0],
Address 0x4B [7:0] sections.
GDECEL [15:0], Gemstar Decoding Even Lines,
Address 0x48 [7:0], Address 0x49 [7:0]
The 16 bits of GDECEL [15:0] are interpreted as a collection of
16 individual lines of decode-enable signals. Each bit refers to a
line of video in an even field. Setting the bit enables the decoder
block trying to find Gemstar or closed caption-compatible data
on that particular line. Setting the bit to 0 prevents the decoder
from trying to retrieve data. See Table 94 and Table 95.
To retrieve closed caption data services on NTSC (Line 284),
GDECEL [11] must be set.
D [2]
0
1
1
0
0
1
0
0
CS [2]
D [2]
0
1
1
0
0
1
CS [2]
D [1]
0
1
1
0
0
0
0
0
0
0
CS [1]
D [1]
0
1
1
0
0
0
0
0
0
0
CS [1]
D [0]
0
1
1
0
0
0
0
0
0
0
CS [0]
D [0]
0
1
1
0
0
0
0
0
0
0
CS [0]
Fixed preamble
Fixed preamble
Fixed preamble
Checksum
Description
DID
SDID
Data count
User data-words
User data-words
UDW padding 0x200
UDW padding 0x200
Description
Fixed preamble
Fixed preamble
Fixed preamble
DID
SDID
Data count
User data-words
User data-words
User data-words
User data-words
Checksum