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參數(shù)資料
| 型號： | ADV7322 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Multiformat 11-Bit HDTV Video Encoder |
| 中文描述： | 多格式11位高清晰度電視視頻編碼器 |
| 文件頁數(shù)： | 47/88頁 |
| 文件大?。?/td> | 991K |
| 代理商： | ADV7322 |
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Preliminary Technical Data
ADV7322
VERTICAL BLANKING INTERVAL
The ADV7322 accepts input data that contains VBI data
[CGMS, WSS, VITS, and so on] in SD and HD modes.
Rev. PrA | Page 47 of 88
For SMPTE 293M [525p] standards, VBI data can be inserted
on Lines 13 to 42 of each frame, or on Lines 6 to 43 for the
ITU-R BT.1358 [625p] standard.
For SD NTSC this data can be present on Lines 10 to 20, and in
PAL on Lines 7 to 22.
If VBI is disabled [Address 0x11, Bit 4 for HD; Address 0x43,
Bit 4 for SD], VBI data is not present at the output and the
entire VBI is blanked. These control bits are valid in all master
and slave modes.
In Slave Mode 0, if VBI is enabled, the blanking bit in the
EAV/SAV code is overwritten. It is possible to use VBI in this
timing mode as well.
In Slave Mode 1 or 2, the BLANK control bit must be set to
enabled [Address 0x4A, Bit 3] to allow VBI data to pass through
the ADV7322. Otherwise, the ADV7322 automatically blanks
the VBI to standard.
If CGMS is enabled and VBI is disabled, the CGMS data will
nevertheless be available at the output.
See Appendix 1—Copy Generation Management System.
SUBCARRIER FREQUENCY REGISTERS
[Subaddresses 0x4C to 0x4F]
Four 8-bit registers are used to set up the subcarrier frequency.
The value of these registers is calculated using the equation
32
2
27
×
=
in
line
video
one
in
cycles
clk
MHz
of
Number
line
video
one
periods
subcarrier
of
Number
Register
Frequency
Subcarrier
where the sum is rounded to the nearest integer.
For example, in NTSC mode
569408543
2
1716
5
227
Re
32
=
×
=
Value
gister
Subcarrier
where:
Subcarrier Register Value
= 0x21F07C1F
SD F
SC
Register 0: 0x1F
SD F
SC
Register 1: 0x7C
SD F
SC
Register 2: 0xF0
SD F
SC
Register 3: 0x21
See the MPU Port Description section for more details on how
to access the subcarrier frequency registers.
Programming the F
SC
The Subcarrier Register Value is shared across 4 F
SC
registers as
shown above. To load the value into the encoder, users must
write to the F
SC
registers in sequence, starting with F
SC
0. The
value is not loaded until the F
SC
4 write is complete.
Note that the ADV7322 power-up value for F
SC
0 = 0x1E. For
precise NTSC F
SC
, write 0x1F to this register.
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| ADV73225709 | 制造商:LG Corporation 功能描述:Frame Assembly |
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| ADV73225718 | 制造商:LG Corporation 功能描述:Frame Assembly |
| ADV73225719 | 制造商:LG Corporation 功能描述:Frame Assembly |
| ADV73225801 | 制造商:LG Corporation 功能描述:Frame Assembly |
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