參數(shù)資料
型號： ADV7194
廠商： Analog Devices, Inc.
英文描述： Professional Extended-10⑩ Video Encoder with 54 MHz Oversampling
中文描述： 專業(yè)擴展- 10⑩視頻編碼器，54兆赫采樣
文件頁數(shù)： 40/69頁
文件大?。?/td> 647K
代理商： ADV7194
ADV7194
–40–
REV. 0
HUE ADJUST CONTROL REGISTER (HCR)
(Address (SR5–SR0) = 20H)
The hue control register is an 8-bit-wide register used to adjust
the hue on the composite and chroma outputs. Figure 80 shows
the operation under control of this register.
HCR7
–
HCR0
HUE ADJUST VALUE
HCR7
HCR6
HCR5
HCR4
HCR3
HCR2
HCR1
HCR0
Figure 80. Hue Adjust Control Register
HCR BIT DESCRIPTION
Hue Adjust Value (HCR0–HCR7)
These eight bits represent the value required to vary the hue of
the video data, i.e., the variance in phase of the subcarrier during
active video with respect to the phase of the subcarrier during
the colorburst. The ADV7194 provides a range of
±
22.5
°
incre-
ments of 0.17578125
°
. For normal operation (zero adjustment)
this register is set to 80Hex. FFHex and 00Hex represent the
upper and lower limit (respectively) of adjustment attainable.
H
ue Adjust
[
°
] = 0.17578125
°
×
(H
CR
d
–
128); for positive Hue
Adjust Value
Example:
To adjust the hue by +4
°
write 97
h
to the Hue Adjust Control
Register:
(4/0.17578125) + 128 = 151
d
*
= 97
h
To adjust the hue by (
–
4
°
) write 69
h
to the Hue Adjust Control
Register:
(
–
4/0.17578125) + 128 = 105
d
* =
69
h
*
Rounded to the nearest integer.
BRIGHTNESS CONTROL REGISTERS (BCR)
(Address (SR5–SR0) = 21H)
The brightness control register is an 8-bit-wide register which
allows brightness control. Figure 81 shows the operation under
control of this register.
BCR BIT DESCRIPTION
Brightness Value (BCR0–BCR6)
Seven bits of this 8-bit-wide register are used to control the
brightness level. The brightness is controlled by adding a pro-
grammable setup level onto the scaled Y data. This brightness
level can be a positive or negative value.
The programmable brightness levels in NTSC without pedestal
and PAL are max 15 IRE and min
–
7.5 IRE, in NTSC with
pedestal max 22.5 IRE and min 0 IRE.
Table VI. Brightness Control Register Value
S
etup
Level in
NTSC with
Pedestal
Setup
Level in
NTSC No
Pedestal
Brightness
Control
Register
Value
Setup
Level in
PAL
22.5 IRE
15 IRE
7.5 IRE
0 IRE
15 IRE
7.5 IRE
0 IRE
–
7.5 IRE
15 IRE
7.5 IRE
0 IRE
–
7.5 IRE
1E
h
0F
h
00
h
71
h
NOTE
Values in the range from 3F
h
to 44
h
might result in an invalid output signal.
BCR6
–
BCR0
BRIGHTNESS VALUE
BCR7
ZERO MUST BE
WRITTEN TO
THIS BIT
BCR7
BCR6
BCR5
BCR4
BCR3
BCR2
BCR1
BCR0
100 IRE
0 IRE
+7.5 IRE
–
7.5 IRE
NTSC WITHOUT PEDESTAL
NO SETUP VALUE
ADDED
POSITIVE SETUP
VALUE ADDED
WRITE TO BRIGHTNESS
CONTROL REGISTER: 12
h
NEGATIVE SETUP
VALUE ADDED
WRITE TO BRIGHTNESS
CONTROL REGISTER: 6E
h
Figure 81. Brightness Control Register
EXAMPLE
1. Standard: NTSC with Pedestal. To add +20 IRE brightness level, write 28
H
into the Brightness Control Register:
[
Brightness Control Register Value
]
h
= [
IRE Value
2.015631]
h
= [20
×
2.015631]
h
= [40.31262]
h
= 28
h
2. Standard: PAL. To add
–
7 IRE brightness level write 72
h
into the Brightness Control Register:
[|
IRE Value
|
×
2.015631]
= [7
×
2.015631]
= [14.109417] = 0001110
b
[0001110]
into two’s complement
= 1110010
b
= 72
h
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADV7194KST 制造商:Analog Devices 功能描述:Video Encoder 6DAC 10-Bit 80-Pin LQFP 制造商:Rochester Electronics LLC 功能描述:PROFESSIONAL/HDTV NTSC/PAL ENCODER I.C. - Bulk 制造商:Analog Devices 功能描述:IC VIDEO ENCODER
ADV7194KSTZ 功能描述:IC ENCODER VIDEO EXT-10 80-LQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 編碼器，解碼器，轉(zhuǎn)換器 系列:- 產(chǎn)品變化通告:Development Systems Discontinuation 26/Apr/2011 標(biāo)準(zhǔn)包裝:1 系列:- 類型:編碼器 應(yīng)用:DVB-S.2 系統(tǒng) 電壓 - 電源，模擬:- 電壓 - 電源，數(shù)字:- 安裝類型:- 封裝/外殼:模塊 供應(yīng)商設(shè)備封裝:模塊 包裝:散裝 其它名稱:Q4645799
ADV7194KSTZ 制造商:Analog Devices 功能描述:TV / Video IC
ADV7195 制造商:AD 制造商全稱:Analog Devices 功能描述:Multiformat Progressive Scan/HDTV Encoder with Three 11-Bit DACs and 10-Bit Data Input
ADV7195KS 制造商:Analog Devices 功能描述:Video Encoder 3DAC 11-Bit 52-Pin MQFP 制造商:Rochester Electronics LLC 功能描述:MULTI-FORMAT VID+PROGSCAN/HDTV ENCODERIC - Bulk
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