Vela CineCast 2000-0422, Инструкция по установке и эксплуатации

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62 CineCast Quad Pro Version 2.6 Installation and User Manual
MPEG PLAY Command
inserted between the switched playback. A value of 0 means no black is inserted
before changing channels.
Trigger Event
When Trigger = 1, this field determines which event will start (trigger) the playback.
To cancel a pending Triggered Playback, use the Stop command (decoder com-
mand 45h with command code 0023h). To override the Triggered Playback, send
the command “Resume from Pause” (0012h). This will cancel the wait for trigger
and force playback to begin immediately.
For a Hardware Trigger based on either GPIN1 or GPIN2, the decoder waits for
the trigger discrete input (GPIN1 or GPIN2) to be closed (grounded) before
beginning playback.
These inputs are located on the two 44-pin connectors as shown in Table 1-6,
“D-Sub Connector Pinout, J13,” on page 39, and Table 1-7, “D-Sub Connector
Pinout, J25,” on page 41.
Chroma Format Select (Chroma)
The IBM decoder hardware uses two different loads of microcode depending on the
application. One strictly plays 4:2:2 chroma format streams and is optimized for high
bit rate streams (>25Mbps). The other plays 4:2:0 or 4:2:2 chroma format. Normally
the firmware selects the appropriate MPEG microcode, but the host can override.
Trigger Source
Value
Source Event
0000b Hardware trigger using GPIN1 (default)
0001b Hardware trigger using GPIN2
0010b Trigger on LTC input match (used in conjunction
with Set Time Code 0004h command)
0100b Trigger when adjacent channel playback complete
Chroma Format Mode Description Comments
00b Autodetect Firmware selects IBM microcode (default)
01b 4:2:0 Mode Uses “4:2:0 IBM microcode” (will play 4:2:0 at
all bit rates and 4:2:2 up to ~25Mbps)