HMP8116 Datasheet, PDF(28/43 Page) Intersil Corporation

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HMP8116 Datasheet, PDF (28/43 Pages) Intersil Corporation – NTSC/PAL Video Decoder

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HMP8116

TABLE 17. LUMA PROCESSING REGISTER

BIT

NO.

FUNCTION

SUB ADDRESS = 08H

DESCRIPTION

RESET

STATE

7-6

Y Filtering

Select

The chroma trap filter may be used to remove any residual color subcarrier information

00B

from the Y channel. During S-video operation, it should be disabled. During PAL opera-

tion, it should be enabled. The 3MHz lowpass filter may be used to remove high-frequency

noise.

00 = No filtering

01 = Enable chroma trap filter

10 = Enable 3.0MHz lowpass filter

11 = reserved

5-4

Black Level Y

Coring may be used to reduce low-level noise around black in the Y signal.

00B

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.

01B

Coring Select

00 = No coring

01 = 1 code coring

10 = 2 code coring

11 = 3 code coring

1-0

Sharpness

If a value of â01â or â10â, the sharpness adjust register is used to specify the amount of

00B

Frequency Select sharpness to be applied.

00 = Bypass sharpness control

01 = Maximum gain at 2.6MHz

10 = Maximum gain at color subcarrier frequency

11 = reserved

TABLE 18. SLICED VBI DATA ENABLE REGISTER

BIT

NO.

FUNCTION

SUB ADDRESS = 0AH

DESCRIPTION

RESET

STATE

7-6

Sliced

00 = Closed caption disabled

00B

Closed Captioning 01 = Closed caption enabled for odd fields: line 21 for NTSC, line 18 for (M) PAL, or line

Enable

22 for (B, D, G, H, I, N, NC) 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, NC) PAL

11 = Closed caption enabled for both odd and even fields

5-4

Sliced

WSS Enable

00 = WSS disabled

00B

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, NC) 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, NC) PAL

11 = WSS enabled for both odd and even fields

3-2

Sliced

00 = Teletext disabled

00B

Teletext

01 = Teletext system B enabled

Enable

10 = Teletext system C enabled

11 = Teletext system D enabled

1-0

Reserved

00B

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