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| 型號： | ADV7311KST |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 顏色信號轉換 |
| 英文描述： | Multiformat 216 MHz Video Encoder with Six NSV 12-Bit DACs |
| 中文描述： | COLOR SIGNAL ENCODER, PQFP64 |
| 封裝： | PLASTIC, MS-026BCD, LQFP-64 |
| 文件頁數(shù)： | 46/84頁 |
| 文件大小： | 1099K |
| 代理商： | ADV7311KST |
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REV. A
–46–
ADV7310/ADV7311
SD Hue Adjust Value
[Subaddress 60h]
The hue adjust value is used to adjust the hue on the composite
and chroma outputs.
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 color burst. The ADV7310/ADV7311 provides a range of
22.5
o
increments of 0.17578125
o
. For normal operation (zero
adjustment), this register is set to 80h. FFh and 00h represent the
upper and lower limits (respectively) of adjustment attainable.
(Hue Adjust) [
o
] = 0.17578125
o
×
(HCR
d
– 128), for positive
hue adjust value.
For example, to adjust the hue by +4
o
, write 97h to the Hue
Adjust Value register:
4
0 17578125
128
105
97
*
=
=
d
h
*
rounded to the nearest integer
To adjust the hue by –4
o
, write 69h to the Hue Adjust Value
register:
0 17578125
=
=
4
128
105
69
*
d
h
*
rounded to the nearest integer
SD Brightness Control
[Subaddress 61h]
The brightness is controlled by adding a programmable setup
level onto the scaled Y data. This brightness level may be added
onto the scaled Y data. For NTSC with pedestal, the setup can
vary from 0IRE to 22.5IRE. For NTSC without pedestal and
PAL, the setup can vary from –7.5IRE to +15IRE.
The brightness control register is an 8-bit register. Seven bits of
this 8-bit register are used to control the brightness level. This
brightness level can be a positive or negative value.
For example:
Standard: NTSC with Pedestal.
To add +20IRE brightness level, write 28h to Address 61h,
SD brightness.
[
×
[
×
[
SDBrightnessValue
IREValue
h
h
h
h
h
]
=
]
=
40.31262
]
=
[
]
=
2.015631
20
2.015631
28
Standard: PAL.
To add –7IRE brightness level, write 72h to Address 61h,
SD brightness.
[
×
[
[
IREValue
b
into twoscomplement
b
h
×
]
=
]
=
[
]
=
]
=
[
]
=
2.015631
7
2.015631
14.109417
0001110
0001110
1110010
72
Table X. Brightness Control Values
*
Setup
Level In
NTSC with
Pedestal
Setup
Level In
NTSC No
Pedestal
Setup
Level In
PAL
SD
Brightness
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
1Eh
0Fh
00h
71h
*
Values in the range from 3Fh to 44h might result in an invalid output signal.
SD Brightness Detect
[Subaddress 7Ah]
The ADV7310/ADV7311 allow monitoring of the brightness
level of the incoming video data. Brightness detect is a read-only
register.
Double Buffering
[Subaddress 13h, Bit 7; Subaddress 48h, Bit 2]
Double buffered registers are updated once per field on the
falling edge of the
VSYNC
signal. Double buffering improves
the overall performance since modifications to register settings
will not be made during active video, but take effect on the start
of the active video.
Double buffering can be activated on the following HD registers:
HD Gamma A and Gamma B curves and HD CGMS registers.
Double buffering can be activated on the following SD registers:
SD Gamma A and Gamma B curves, SD Y Scale, SD U Scale,
SD V Scale, SD Brightness, SD Closed Captioning, and
SD Macrovision Bits 5–0.
NTSC WITHOUT PEDESTAL
NO SETUP
VALUE ADDED
POSITIVE SETUP
VALUE ADDED
100 IRE
0 IRE
NEGATIVE SETUP
VALUE ADDED
–7.5 IRE
+7.5 IRE
Figure 39. Examples of Brightness Control Values
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PDF描述 |
|---|---|
| ADV7312 | Multiformat 11-Bit HDTV Video Encoder |
| ADV7312KST | Multiformat 11-Bit HDTV Video Encoder |
| ADV7320KSTZ | Multiformat 216 MHz Video Encoder with Six NSV 12-Bit DACs |
| ADV7320 | Multiformat 216 MHz Video Encoder with Six NSV 12-Bit DACs |
| ADV7321 | Multiformat 216 MHz Video Encoder with Six NSV 12-Bit DACs |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ADV7311KST | 制造商:Analog Devices 功能描述:Video IC |
| ADV7312 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Multiformat 11-Bit HDTV Video Encoder |
| ADV7312KST | 制造商:AD 制造商全稱:Analog Devices 功能描述:Multiformat 11-Bit HDTV Video Encoder |
| ADV7314 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Multiformat 216 MHz Video Encoder with Six NSV 14-Bit DACs |
| ADV7314KST | 制造商:AD 制造商全稱:Analog Devices 功能描述:Multiformat 216 MHz Video Encoder with Six NSV 14-Bit DACs |
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