SAA7127 Ver la hoja de datos (PDF) - Philips Electronics

Número de pieza

componentes Descripción

Fabricante

SAA7127

Digital video encoder

Philips Electronics 

Philips Semiconductors

Digital video encoder

Product specification

SAA7126H; SAA7127H

Table 18 Subaddress 5DH

DATA BYTE

BLCKL

DECOE

DESCRIPTION

variable black level; input

representation in

accordance with

“CCIR 601”

real-time control

CONDITIONS

white-to-sync = 140 IRE;

note 1

BLCKL = 0; note 1

BLCKL = 63 (3FH); note 1

white-to-sync = 143 IRE;

note 2

BLCKL = 0; note 2

BLCKL = 63 (3FH); note 2

logic 0

logic 1

REMARKS

recommended value: BLCKL = 58 (3AH)

output black level = 29 IRE

output black level = 49 IRE

recommended value: BLCKL = 51 (33H)

output black level = 27 IRE

output black level = 47 IRE

disable odd/even field control bit from RTCI

enable odd/even field control bit from RTCI

(see Fig.13)

Notes

1. Output black level/IRE = BLCKL × 2/6.29 + 28.9.

2. Output black level/IRE = BLCKL × 2/6.18 + 26.5.

Table 19 Subaddress 5EH

DATA BYTE

DESCRIPTION

BLNNL

variable blanking level

DECPH

real-time control

CONDITIONS

white-to-sync = 140 IRE;

note 1

BLNNL = 0; note 1

BLNNL = 63 (3FH); note 1

white-to-sync = 143 IRE;

note 2

BLNNL = 0; note 2

BLNNL = 63 (3FH); note 2

logic 0

logic 1

REMARKS

recommended value: BLNNL = 46 (2EH)

output blanking level = 25 IRE

output blanking level = 45 IRE

recommended value: BLNNL = 53 (35H)

output blanking level = 26 IRE

output blanking level = 46 IRE

disable subcarrier phase reset bit from RTCI

enable subcarrier phase reset bit from RTCI

(see Fig.13)

Notes

1. Output black level/IRE = BLNNL × 2/6.29 + 25.4.

2. Output black level/IRE = BLNNL × 2/6.18 + 25.9; default after reset: 35H.

Table 20 Subaddress 5FH

DATA BYTE

DESCRIPTION

BLNVB

CCRS

variable blanking level during vertical blanking interval is typically identical to value of BLNNL

select cross-colour reduction filter in luminance; see Table 21

2002 Oct 15

17

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