SAA7127 Просмотр технического описания (PDF) - Philips Electronics

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производитель

SAA7127

Digital video encoder

Philips Electronics 

Philips Semiconductors

Digital video encoder

Product specification

SAA7126H; SAA7127H

Table 14 Subaddresses 55H to 59H

DATA BYTE

DESCRIPTION

VPS5

fifth byte of video programming system data

VPS11

eleventh byte of video programming system data

VPS12

twelfth byte of video programming system data

VPS13

thirteenth byte of video programming system data

VPS14

fourteenth byte of video programming system data

REMARKS

LSBs of the respective bytes are encoded

immediately after run-in and framing code in

line 16; all other bytes are not relevant for

VPS

Table 15 Subaddress 5AH

DATA BYTE

DESCRIPTION

CHPS

phase of encoded colour subcarrier

(including burst) relative to horizontal

sync; can be adjusted in steps of

360/256 degrees

VALUE

6BH

95H

A3H

46H

RESULT

PAL-B/G and data from input ports

PAL-B/G and data from look-up table

NTSC-M and data from input ports

NTSC-M and data from look-up table

Table 16 Subaddresses 5BH and 5DH

DATA BYTE

DESCRIPTION

GAINU

variable gain for

CB signal; input

representation in

accordance with

“CCIR 601”

CONDITIONS

white-to-black = 92.5 IRE

GAINU = 0

GAINU = 118 (76H)

white-to-black = 100 IRE

GAINU = 0

GAINU = 125 (7DH)

REMARKS

GAINU = −2.17 × nominal to +2.16 × nominal

output subcarrier of U contribution = 0

output subcarrier of U contribution = nominal

GAINU = −2.05 × nominal to +2.04 × nominal

output subcarrier of U contribution = 0

output subcarrier of U contribution = nominal

Table 17 Subaddresses 5CH and 5EH

DATA BYTE

DESCRIPTION

GAINV

variable gain for

CR signal; input

representation in

accordance with

“CCIR 601”

CONDITIONS

white-to-black = 92.5 IRE

GAINV = 0

GAINV = 165 (A5H)

white-to-black = 100 IRE

GAINV = 0

GAINV = 175 (AFH)

REMARKS

GAINV = −1.55 × nominal to +1.55 × nominal

output subcarrier of V contribution = 0

output subcarrier of V contribution = nominal

GAINV = −1.46 × nominal to +1.46 × nominal

output subcarrier of V contribution = 0

output subcarrier of V contribution = nominal

2002 Oct 15

16

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