GS9023A 데이터 시트보기 (PDF) - Gennum -> Semtech
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GS9023A Datasheet PDF : 37 Pages
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2.2.3 Video Data Output
The video signal is output at the DOUT[9:0] pins. The video
signal is synchronized to the rising edge of PCLK. The
GS9023A is capable of removing audio, extended audio,
arbitrary and audio control packets from the video stream.
To remove packets, the user must set the ANCI pin HIGH or
set the “VSEL” and “ADEL” bits of Host Interface Register
#0h HIGH. The GS9023A then removes each packet having
a DID corresponding to either the audio DID, the extended
audio DID or the arbitrary data DID stored in the Host
Interface Registers from the video stream. See Figure 12.
NOTE: The GS9023A passes EDH packets through
unchanged in the Demultiplex Mode. If any audio, extended
audio, arbitrary or audio control packets are deleted by the
GS9023A, the EDH CRC words become invalid.
When the ANCI pin or “ADEL” bit is LOW, all ancillary data
packets remain in the video signal. See Figure 13.
TRS can also be removed from a 525/625 D2 video signal
when the TRS pin is set HIGH or the “VSEL” and “D2_TRS”
bits of Host Interface Register #0h are set HIGH.
Video signal before GS9023A
Empty
Empty
Empty
Video signal after GS9023A Removal of Audio Group 1 & Extended
Audio Group 1 (ANCI = HIGH or "VSEL" and "ADEL" = HIGH)
Figure 12
Video signal before GS9023A
Empty
Empty
Video signal after GS9023A Removal of Audio Group 1 & Extended Audio Group 1
(ANCI = LOW or "VSEL" = HIGH and "ADEL" = LOW)
Figure 13
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