ADV7183AKST Analog Devices Inc, ADV7183AKST Datasheet - Page 60

• Manufacturer Part Number: ADV7183AKST
• Description: IC VIDEO DECODER NTSC 80-LQFP
• Manufacturer: Analog Devices Inc
• Type: Video Decoderr

Specifications of ADV7183AKST

• Applications: Projectors, Recorders, Security
• Voltage - Supply, Analog: 3.15 V ~ 3.45 V
• Voltage - Supply, Digital: 1.65 V ~ 2 V
• Mounting Type: Surface Mount
• Package / Case: 80-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

ADV7183A
GDECEL[15:0] Gemstar Decoding Even Lines,
Address 0x48 [7:0]; Address 0x49 [7:0]
The 16 bits of the GDECEL[15:0] are interpreted as a collection
of 16 individual line 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 163 and Table 164.
Notes
•
•
Table 160. GDECEL Function
GDECEL[15:0]
0x0000
(default)
GDECOL[15:0] Gemstar Decoding Odd Lines,
Address 0x4A [7:0]; Address 0x4B [7:0]
The 16 bits of the GDECOL[15:0] form a collection of 16
individual line decode enable signals. See Table 163 and
Table 164.
Notes
•
•
Table 161. GDECOL Function
GDECOL[15:0]
0x0000 (default)
To retrieve closed caption data services on NTSC
(Line 284), GDECEL[11] must be set.
To retrieve closed caption data services on PAL (Line 335),
GDECEL[14] must be set.
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.
Description
Do not attempt to decode Gemstar-compatible
data or CCAP on any line (even field).
Description
Do not attempt to decode Gemstar-
compatible data or CCAP on any line (odd
field).
Rev. B | Page 60 of 104
GDECAD Gemstar Decode Ancillary Data Format,
Address 0x4C [0]
The decoded data from Gemstar-compatible transmissions or
closed caption is inserted into the horizontal blanking period of
the respective line of video. There is a potential problem if the
retrieved data bytes have the value 0x00 or 0xFF. In an ITU-R
BT.656-compatible data stream, those 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:
•
•
Table 162. GDECAD Function
GDECAD
0 (default)
1
Insert all data straight into the data stream, even the
reserved values of 0x00 and 0xFF, if they occur. This may
violate the 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.
Description
Split data into half-bytes and insert.
Output data straight in 8-bit format.