ADV7189 Datasheet, PDF (94/104 Pages) Analog Devices – Multiformat SDTV Video Decoder

ADV7189
Table 205. Registers 0xDC to 0xE4
Subaddress Register
0xDC
Letterbox
Control 1
Bit Description
7
LB_TH [4:0]. Sets the threshold value that
detects a black.
0xDD
Letterbox
Control 2
Reserved.
1
LB_EL[3:0]. Programs the end line of the
activity window for LB detection (end of
field).
LB_SL[3:0]. Programs the start line of the
activity window for LB detection (start of ₀
field).
0xDE
0xDF
0xE0
0xE1
0xE2
0xE3
0xE4
Reserved.
0
Reserved.
0
Reserved.
0
SD Offset Cb SD_OFF_CB [7:0]. Adjusts the hue by
selecting the offset for the Cb channel.
1
SD Offset Cr SD_OFF_CR [7:0]. Adjusts the hue by
selecting the offset for the Cr channel.
1
SD
Saturation
Cb
SD_SAT_CB [7:0]. Adjusts the saturation
of the picture by affecting the gain on the ₁
Cb channel.
SD
SD_SAT_CR [7:0]. Adjusts the saturation
Saturation Cr of picture by affecting the gain on the Cr ₁
channel.
Bit
6 5 4 3 2 1 0 Comment
0 1 1 0 0 Default threshold for detection of
black lines.
01
Set as default
1 1 0 0 LB detection ends with last line of
active video on a field.
1100: 262/525.
100
Letterbox detection aligned with
start of active video.
0100: 23/286 NTSC.
0000000
0000000
0010100
0000000
0000000
0 0 0 0 0 0 0 Chroma gain = 0 dB.
0 0 0 0 0 0 0 Chroma gain = 0 dB.
Rev. A | Page 94 of 104