GS9062-CFE3 datasheet(29/46 Pages) GENNUM

29 / 46 page

GS9062 Data Sheet

22209 - 7

February 2007

29 of 46

3.6.3.1 SMPTE 352M Payload Identifier Insertion

The GS9062 can generate and insert SMPTE 352M payload identifier ancillary

data packets into the data stream, based on information programmed into the host

interface.

When this feature is enabled, the device will automatically generate the ancillary

data preambles, (DID, SDID, DBN, DC), and calculate the checksum. The SMPTE

352M packet will be inserted into the data stream according to the line number and

sample position rules defined in the standard. Where an alternate insertion line is

required, the host interface may program the LINE_352M registers (Table 3-6) with

the appropriate line numbers.

The insertion process will only take place if one or more of the four

VIDEO_FORMAT registers (Table 3-7) have been programmed with non-zero

values. In addition, the GS9062 requires the 352M_INS bit of the

IOPROC_DISABLE register be set LOW.

NOTE 1: For the purpose of determining the line and pixel position for insertion, the

GS9062 will differentiate between PsF and interlaced formats by interrogating bits

14 and 15 of the VIDEO_FORMAT_A register.

The packets will be inserted immediately after the EAV word.

NOTE 2: It is the responsibility of the user to ensure that there is sufficient space

in the horizontal blanking interval for the insertion of the SMPTE 352M packets.

If there are other ancillary data packets present, the SMPTE 352M packet will be

inserted in the first available location in the horizontal ancillary space. Ancillary

data must be adjacent to the EAV.

3.6.3.2 Illegal Code Remapping

If the ILLEGAL_REMAP bit of the IOPROC_DISABLE register is set LOW, the

GS9062 will remap all codes within the active picture between the values of 3FCh

and 3FFh to 3FBh. All codes within the active picture area between the values of

000h and 003h will be remapped to 004h.

In addition, 8-bit TRS and ancillary data preambles will be remapped to 10-bit

values if this feature is enabled.

GS9062-CFE3 数据表(PDF) 29 Page - Gennum Corporation