参数资料
型号: IP-SDI
厂商: Altera
文件页数: 40/140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
3–10
Chapter 3: Functional Description
Block Description
The format block latches the user input en_sync_switch signal for three lines to
realign to a new TRS alignment immediately. During switching, you see zero
interrupt at downstream. The trs_locked and frame_locked signals never get
deasserted during sync switch.
Figure 3–6. Format Block Behavior
en_sync_switch
en_sync_switch_reg
line
10
11
12
13
eav_detect
eav_position
2200
(previous TRS timing)
2199
(new TRS timing)
2200
trs_locked/rx_status[3]
frame_locked/rx_status[4]
HD-SDI LN Extraction
The HD-SDI LN extraction module extracts and formats the LN words defined by
SMPTE292M section 5.4 from the HD-SDI chroma channel. The design provides the
LN as an output.
HD-SDI CRC Checking
The CRC module checks the CRC defined by SMPTE292M section 5.5 for the HD-SDI
luma and chroma channels.
1
This module is common to the receiver and the transmitter.
The check is implemented by recalculating the CRCs for each received video line and
then checking the results against the CRC data received. If the results differ, an error
flag is asserted. There are separate error flags for the luma and chroma channels. The
flag is held asserted until the next check is performed.
Accessing Transceiver
The Quartus II software enables you to access the transceiver through the
unencrypted ALTGX wrapper file. You can access the ALTGX wrapper files for
Arria II GX, Arria V, Cyclone IV GX, Stratix II GX, and Stratix IV GX configurations.
You can use one of the two following ways to access the ALTGX wrapper files:
Edit the ALTGX wrapper file, using legal range provided in the respective device
handbooks.
Use analog control through the ALTGX_RECONFIG megafunction.
c Do not reinstantiate the customized ALTGX wrapper file using the MegaWizard
Plug-In Manager so that you do not lose the default content of the wrapper file after
regeneration.
Serial Digital Interface (SDI) MegaCore Function
User Guide
February 2013 Altera Corporation
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