參數(shù)資料
型號(hào)： GS1532*
英文描述： Serializer for HD-SDI. SD-SDI & DVB-ASI. 3.3/1.8V supply.
中文描述： 序列化的HD - SDI信號(hào)。標(biāo)清SDI
文件頁(yè)數(shù)： 28/39頁(yè)
文件大小： 631K
GENNUM CORPORATION
21498-1
28 of 39
G
3.6.3.1 SMPTE 352M Payload Identifier Insertion
The GS1532 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 6)
with the appropriate line numbers.
The insertion process will only take place if one or more of
the four VIDEO_FORMAT registers (Table 7) have been
programmed with non-zero values. In addition, the GS1532
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 GS1532 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
in SD video streams and immediately after the line-based
CRC word in the Y channel of HD video streams.
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 in SD streams or to the line based-CRC
in HD streams. Where there is insufficient space available,
the 352M packets will not be inserted.
TABLE 6 HOST INTERFACE DESCRIPTION FOR SMPTE 352M PACKET LINE NUMBER INSERTION REGISTERS
REGISTER NAME
BIT
NAME
DESCRIPTION
R/W
DEFAULT
LINE_352M_f1
Address: 027h
15-11
Not Used
10-0
LINE_0_352M[10:0]
Line number where SMPTE352M packet is
inserted in field 1. This line number overrides
the standard line number. If set to zero, the
standard line number is used.
R/W
0
LINE_352M_f2
Address: 028h
15-11
Not Used
10-0
LINE_1_352M[10:0]
Line number where SMPTE352M packet is
inserted in field 2. This line number overrides
the standard line number. If set to zero, the
standard line number is used.
R/W
0
TABLE 7 HOST INTERFACE DESCRIPTION FOR SMPTE 352M PAYLOAD IDENTIFIER REGISTERS
REGISTER NAME
BIT
NAME
DESCRIPTION
R/W
DEFAULT
VIDEO_FORMAT_B
Address: 011h
15-8
SMPTE352M
Byte 4
SMPTE 352M Byte 4 information must be
programmed in this register when 352M_INS =
LOW.
R/W
0
7-0
SMPTE352M
Byte 3
SMPTE 352M Byte 3 information must be
programmed in this register when 352M_INS =
LOW.
R/W
0
VIDEO_FORMAT_A
Address: 010h
15-8
SMPTE352M
Byte 2
SMPTE 352M Byte 2 information must be
programmed in this register when 352M_INS =
LOW.
R/W
0
7-0
SMPTE 352M
Byte 1
SMPTE 352M Byte 1 information must be
programmed in this register when 352M_INS =
LOW.
R/W
0
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