Altera SDI II MegaCore Manuel d'utilisateur télécharger pdf (Page 56)

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

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Altera SDI II MegaCore Manuel d'utilisateur Page 56