ADV7188BSTZ Analog Devices Inc, ADV7188BSTZ Datasheet - Page 32

• Manufacturer Part Number: ADV7188BSTZ
• Description: IC DECODER VID MULTIFORM 80LQFP
• Manufacturer: Analog Devices Inc
• Type: Video Decoderr

Specifications of ADV7188BSTZ

• Applications: Set-Top Boxes, Video Players, Recorders
• 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
• Resolution (bits): 12bit
• Input Format: Analog
• Output Format: Digital
• Adc Sample Rate: 54MSPS
• No. Of Input Channels: 12
• Supply Voltage Range: 3V To 3.6V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

ADV7188
In automatic mode, the system preserves the maximum possible
bandwidth for good CVBS sources (because they can successfully
be combed) and for luma components of YPrPb and Y/C sources
(because they need not be combed). For poor quality signals, the
system selects from a set of proprietary shaping filter responses
that complements comb filter operation to reduce visual artifacts.
The control logic is shown in Figure 15.
YSFM [4:0], Y-Shaping Filter Mode, Address 0x17 [4:0]
The Y-shaping filter mode bits allow the user to select from a
wide range of low-pass and notch filters. When these bits are set
to either of the automatic selection modes, the filter is selected
based on other bit selections, such as detected video standard, and
properties extracted from the incoming video itself, such as quality
and time-base stability. The automatic selection always picks the
widest possible bandwidth for the video input encountered.
If the YSFM settings specify a filter (that is, YSFM is set to values
other than 00000 or 00001), the chosen filter is applied to all video,
regardless of its quality.
In either of the automatic selection modes, the notch filters are
only used for poor quality video signals. For all other video signals,
wideband filters are used (see Table 36).
AUTO SELECT LUMA-
COMPLEMENT COMB
SHAPING FILTER TO
BAD
SELECT WIDEBAND
FILTER AS PER
WYSFM[4:0]
Figure 15. YSFM and WYSFM Control Flowchart
QUALITY
VIDEO
1
YES
Rev. A | Page 32 of 112
WYSFMOVR
GOOD
YSFM IN AUTO MODE?
00000 OR 00001
SET YSFM
Table 36. YSFM Function
YSFM [4:0]
00000
00001 (default)
00010
00011
00100
00101
00110
00111
01000
01001
01010
01011
01100
01101
01110
01111
10000
10001
10010
10011
10100
10101
10110
10111
11000
11001
11010
11011
11100
11101
11110
11111
WIDEBAND FILTER
AUTOMATICALLY
SELECT BEST
0
FILTER REGARDLESS OF
USE YSFM-SELECTED
NO
Description
Automatic selection, including a
wide-notch response (PAL/NTSC/SECAM)
Automatic selection, including a
narrow-notch response (PAL/NTSC/SECAM)
SVHS 1
SVHS 2
SVHS 3
SVHS 4
SVHS 5
SVHS 6
SVHS 7
SVHS 8
SVHS 9
SVHS 10
SVHS 11
SVHS 12
SVHS 13
SVHS 14
SVHS 15
SVHS 16
SVHS 17
SVHS 18 (CCIR 601)
PAL NN 1
PAL NN 2
PAL NN 3
PAL WN 1
PAL WN 2
NTSC NN 1
NTSC NN 2
NTSC NN 3
NTSC WN 1
NTSC WN 2
NTSC WN 3
Reserved
VIDEO QUALITY