参数资料
型号: IP-SDI
厂商: Altera
文件页数: 39/140页
文件大小: 0K
描述: IP VIDEO INTERFACE - SDI
标准包装: 1
系列: *
类型: MegaCore
功能: 视频系统用串行数字接口
许可证: 初始许可证
Chapter 3: Functional Description
3–9
Block Description
Video Timing Flags Extraction
The TRS match module extracts the F, V, and H video timing flags from the received
data. You can use these flags for receiver format detection, or in the implementation of
a flywheel function.
The TRS match module also identifies the line number and CRC words for HD-SDI.
RP168 Switching Compliance
To meet the RP168 requirements, the transceiver must be able to recover by the end of
the switching line. Table 3–4 lists the supported video switching type.
f For more information about the switching line and time for different video formats,
refer to RP168 .
Table 3–4. Supported Video Switching Type
Standard/ Data Rate
Fixed
Fixed
Switch
Switch
Format
Switch (same format)
Switch
Fixed
Switch
RP168 Support
Yes
No
No
No
Switching Source
HD-1080i30 to HD-1080i30
HD-1080 to HD-720
HD-1080 to SD-525
HD-1080 to SD-525
Figure 3–5 and Figure 3–6 show the behaviors of the aligner and format blocks during
the RP168 switching.
The aligner block immediately aligns to the next TRS timing based on the user input
en_sync_switch signal.
Figure 3–5. Aligner Block Behavior
(1)
(2)
(3)
rx_data
10200
00000H
40020H
10200H
10200H
10200H
10200H
tx_data 1 0200
00000H
10200H
10200H
10200H
10200H
10200H
dead_time
switch
line
10
11
12
(2)
alignment
03H
12H
(4)
align_locked/rx_status[2]
Notes to Figure 3–5 :
(1) Mismatch in alignment.
(2) New alignment on the next TRS.
(3) Data aligned to new alignment.
(4) Zero interrupt.
February 2013
Altera Corporation
Serial Digital Interface (SDI) MegaCore Function
User Guide
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