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•In tx-rx (cm) mode
Item number Category
C001
setup (Tx)
C003
setup (Rx)
C011
setup (Tx)
Item
Arguments
ref_source
input
internal
sync_phase
0x600 to 800 to 9ff
chroma
422
420
Function
The SDI input is used as reference for the
system clock.
The internal frame phase is determined by
following the frame phase of the input.
When the SDI is switched with a router
switch or similar, if the phase difference of
the input video is within ±10 µs, the
decoded video is switched without
transients appearing. If within the Window
(±1.5H), then there are no transients on the
ASI TS stream. If the Window is exceeded,
in order to follow the input, and reestablish
the frame phase lock, the TS stream is
interrupted for a few seconds.
Use this on condition that the input signal
is stable, in order to use a fixed latency.
The SDI input is used as reference for the
system clock.
The internal frame phase is determined
from the phase of the first video frame
input. At the time of SDI input switching,
therefore, with the relative phase of the
input frame and internal frame, the latency
fluctuates within a range of one frame.
Depending on the latency fluctuation, an
offset is applied to the audio PTS, and lip
sync is adjusted. Therefore, depending on
the phase difference between input frame
and internal frame, the audio stream may
be interrupted for several seconds.
With the switching timing, image
degradation occurs up to a maximum of
one frame, but transients do not appear on
the ASI TS stream.
Use this when using asynchronous SDI
switched with a router switch or similar, in
order to output a stable TS stream even if
there is degradation in the input signal.
Note
If the switching timing of the input signal is
outside the standard (SMPTE RP168),
there may be degradation of the TS stream
or image.
Specifies any hexadecimal value from
0x600 to 0x9ff, to enable fine adjustment of
the SDI output sync phase.
The adjustment range is ±18.9 µs.
This is 422P@ML.
This is MP@ML.
44
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