Submodules, Insert line, Submodules -14 – Altera SDI II MegaCore User Manual
Page 56: Insert line -14
Submodules
You can reuse the submodules in the protocol and transceiver components across different video
standard. The SDI II IP core consists of the following submodules:
• Insert Line
• Insert/Check CRC
• Insert Payload ID
• Match TRS
• Scrambler
• Tx Oversample
• Rx Oversample
• Detect Video Standard
• Detect 1 & 1/1.001 Rates
• Transceiver Controller
• Descrambler
• TRS Aligner
• 3Gb Demux
• Extract Line
• Extract Payload ID
• Detect Format
• Sync Streams
• Convert SD Bits
• Insert Sync Bit Values
• Remove Sync Bit Values
Insert Line
The insert line submodule provides HD-SDI the option to include line numbers along with the video data.
This information is at the end of active video (EAV) extension words of the data stream, as defined in the
SMPTE292M specification. The line number is 11 bits wide and spreads over two SDI words to use the
SDI legal data space.
This submodule takes the 11-bit line number data value, correctly encodes them, and inserts them into the
10-bit stream. The line number value is user-defined. The top level port signal is
tx_ln[10:0]
and
tx_ln_b[10:0]
for link B in level B and HD dual link modes. You also have the option to enable or
disable this feature using the
tx_enable_ln
signal at the top level port. The SDI II IP core inserts the
same line number value into both video channels. The Y and C channels require two of these submodules.
The match TRS submodule indicates to this submodule when to insert the values into the stream.
4-14
Submodules
UG-01125
2015.05.04
Altera Corporation
SDI II IP Core Functional Description