HMP8117_07 Datasheet, PDF (26/45 Pages) Intersil Corporation – NTSC/PAL Video Decoder

HMP8117
TABLE 18. LUMA PROCESSING REGISTER
BIT
NO.
FUNCTION
SUB ADDRESS = 08_H
DESCRIPTION
RESET
STATE
7-6
Y Filtering
Select
The chroma trap filter may be used to remove any residual color subcarrier information from the
00_B
Y channel. During S-video operation, it should be disabled. During PAL operation, it should be
enabled. The 3MHz low-pass filter may be used to remove high-frequency noise.
00 = No filtering
01 = Enable chroma trap filter
10 = Enable 3.0MHz low-pass filter
11 = reserved
5-4
Black Level Y
Coring may be used to reduce low-level noise around black in the Y signal.
00_B
Coring Select
00 = No coring
01 = 1 code coring
10 = 2 code coring
11 = 3 code coring
3-2
High Frequency Y Coring may be used to reduce high-frequency low-level noise in the Y signal.
01_B
Coring Select
00 = No coring
01 = 1 code coring
10 = 2 code coring
11 = 3 code coring
1-0
Sharpness
Specifies the amount of sharpness to be applied per the Sharpness Adjust register 1E_H.
00_B
Frequency Select 00 = Bypass sharpness control10 = Maximum gain at color F_SC
01 = Maximum gain at 2.6MHz11 = reserved
TABLE 19. SLICED VBI DATA ENABLE REGISTER
BIT
NO.
FUNCTION
SUB ADDRESS = 0A_H
DESCRIPTION
RESET
STATE
7-6
Sliced
00 = Closed caption disabled
00_B
Closed Captioning 01 = Closed caption enabled for odd fields: line 21 for NTSC, line 18 for (M) PAL, or line 22 for
Enable
(B, D, G, H, I, N, N_C) PAL
10 = Closed caption enabled for even fields: line 284 for NTSC, line 281 for (M) PAL, or line 335
for (B, D, G, H, I, N, N_C) PAL
11 = Closed caption enabled for both odd and even fields
5-4
Sliced
WSS Enable
00 = WSS disabled
00_B
01 = WSS enabled for odd fields: line 20 for NTSC; line 17 for (M) PAL, or line 23 for (B, D, G, H,
I, N, N_C) PAL
10 = WSS enabled for even fields: line 283 for NTSC, line 280 for (M) PAL, or line 336 for (B, D,
G, H, I, N, N_C) PAL
11 = WSS enabled for both odd and even fields
3-2
Sliced Teletext
00 = Teletext disabled10 = Teletext system C enabled
00_B
Enable
01 = Teletext system B enabled11 = Teletext system D enabled
1-0
Reserved
00_B
26
FN4643.3
April 19, 2007