GS2962 Datasheet, PDF (54/82 Pages) Gennum Corporation – Integrated Narrow-Bandwidth PLL

4.8.6 HD and 3G Line Number Calculation and Insertion
The GS2962 is capable of line number generation and insertion, in accordance with the
relevant HD video standard, as determined by the automatic video standard detector.
Line numbers are inserted into both the Y and C channels.
NOTE: Line number generation and insertion only occurs in HD and 3G modes
(RATE_SEL0 = LOW).
The insertion of line numbers only take place if the IOPROC_EN/DIS pin is HIGH and
SMPTE_BYPASS pin is HIGH.
In addition to this, the GS2962 requires the LNUM_INS bit to be set LOW in the IOPROC
register.
4.8.7 Illegal Code Re-Mapping
The GS2962 detects and corrects illegal code words within the active picture area.
All codes within the active picture (outside the horizontal and vertical blanking periods),
between the values of 3FCh and 3FFh are re-mapped to 3FBh. All codes within the active
picture area between the values of 000h and 003h are remapped to 004h.
8-bit TRS code words and ancillary data preambles are also re-mapped to 10-bit values.
The illegal code re-mapping will only take place if the IOPROC_EN/DIS pin is HIGH and
SMPTE_BYPASS is HIGH.
In addition to this, the GS2962 requires the ILLEGAL_REMAP bit to be set LOW in the
IOPROC register.
4.8.8 SMPTE 352M Payload Identifier Packet Insertion
When enabled by the 352M_INS bit in the IOPROC register, new SMPTE 352M payload
identifier packets are inserted into the data stream. These packets are supplied by the
user via the host interface. Setting the 352M_INS bit LOW enables this insertion.
The device will automatically calculate the checksum and generate Version One
compliant 352M ancillary data preambles: DID, SDID, DBN, DC.
The SMPTE 352M packet is inserted into the data stream according to the line number
and sample position rules defined in the 2002 standard.
For HDTV video systems the SMPTE 352M packet is placed in the Y channel only.
By default (at power up or after system reset), the four VIDEO_FORMAT_IN_DS1
registers and the four VIDEO_FORMAT_OUT_DS1 registers are set to zero.
4.8.8.1 3G SMPTE 352M Payload Identifier Packet Insertion
When enabled by the 352M_INS bit in the IOPROC register (000h), new SMPTE 352M
payload identifier packets are inserted into the data streams. Setting this bit LOW
enables insertion.
GS2962 3G/HD/SD-SDI Serializer with Complete
SMPTE Video Support
Data Sheet
48005 - 7
October 2010
54 of 82