參數(shù)資料
型號： GS1582-IBE3
廠商： Gennum Corporation
英文描述： IC,MOT,MC145026P, DIP-16, ENCODER 9 LINE SIMPLEX
中文描述： 多速率的電纜驅(qū)動器，音頻多路復(fù)用器和ClockCleaner⑩串行
文件頁數(shù)： 64/114頁
文件大小： 1224K
代理商： GS1582-IBE3
GS1582 Data Sheet
40117 - 1 November 2007
64 of 114
The non-zero video line numbers on which to insert the ancillary data, the ancillary
data type (HANC or VANC), and the total number of words to insert per line must
be provided via the host interface. At power up, or after system reset, all ancillary
data insertion line numbers and total number of words default to zero.
If the total number of data words specified per line exceeds 128 only the first 128
data words will be inserted.
The device automatically converts the provided 8-bit data words into the 10-bit
data, formatted according to SMPTE 291M prior to insertion.
4.8.1.2 Concatenated Mode
In concatenated mode, it is possible to insert up to 512 8-bit horizontal or vertical
ancillary data words on one line per video frame. Concatenated line mode can be
selected by setting the ANC_INS_MODE bit in the host interface HIGH. By default,
at power up, separate line mode is selected.
The non-zero video line number on which to insert the ancillary data, the ancillary
data type (HANC or VANC), and the total number of words to insert must be
provided via the host interface. At power up, or after system reset, the ancillary
data insertion line number and total number of words default to zero.
If the total number of data words specified exceeds 512 only the first 512 data
words will be inserted.
The device automatically converts the provided 8-bit data words into the 10-bit data
formatted according to SMPTE 291M prior to insertion.
4.8.2 HANC Insertion
By default, at power up or after system reset, all ancillary data is inserted in the
HANC space. Data is inserted contiguously starting at the TRS EAV or the first
available location following any audio and pre-existing ancillary data packets. Data
insertion terminates when all provided data words have been inserted or at the start
of the TRS SAV code, whichever occurs first. If termination occurs before all words
have been inserted, the PACKET_MISSED bit will be set in the host interface.
NOTE 1: EDH packet insertion in SD mode occurs following ancillary data
insertion. Thus, any HANC data inserted on the same line as the EDH packet may
be overwritten during EDH insertion. When HANC data is inserted on an EDH line,
the PACKET_MISSED bit may be erroneously set, even though the ancillary data
packet has been inserted correctly.
NOTE 2: HANC space ancillary data headers undergo 8-bit to 10-bit remapping.
This means that when the 8 MSBs are all zero, the value gets mapped to 000 and
when the 8 MSBs are all 1, the value gets mapped to 3FF. (i.e. 000, 001, 002, 003
>
000 and 3FE, 3FD, 3FC
>
3FF)
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