Miranda NV5100MC Master Control, Справочное руководство

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70 Rev 2.10 • 17 Feb 11
4. MCPMs
Other General Features
There are 4 FTB transition types. These are similar to, but not quite the same as, the basic transition
types for effects:
1 Fade from synchronous source — the program output mixes with matte:
Output = matte × T + program × (1– T ) as T progresses from 0 to 1.
2 Fade from matte to synchronous source — the program output mixes with matte:
Output = program × T + matte × (1– T ) as T progresses from 0 to 1.
3 Cut to matte from non-synchronous source.
Fades are not possible with non-sync sources. Program output cuts from the non-sync bypass to
matte.
4 Cut to non-synchronous source from matte.
Fades are not possible with non-sync sources. Program output cuts from matte to non-sync
bypass.
(Fade changes occur at switch point of vertical blanking.)
Ancillary Data and Switch Point
The MCPM passes Vertical Ancillary Data (VANC) without modification. It (1) extracts the VANC
data from the video stream, (2) bypasses the video processing path, and (3) reinserts it in the outgo-
ing video at the right moment relative to the switch point. The VANC passed is always associated
with the source on the program bus. The MCPM switches VANC data from the prior source to the
new source at the
end of the transition.
Embedded audio data output from the MCPM originates in the MCPM. If a source has embedded
audio and the system is configured to process embedded audio, then the embedded audio is pro-
cessed and inserted downstream of the video processing section. If the source does not contain
embedded audio, then the MCPM embeds discrete AES audio in the video output.
The MCPM complies with the SMPTE RP168-2002 definition of switch point with an exception.
The MCPM is not field-based, so switching occurs on the first field of the frame only.
The program, preset, and clean-feed outputs each receive the source’s VANC and embedded audio.
Transitions Involving Pre-Roll
Only MCEs support machine control or pre-roll. See Machine Control and Pre-Roll on page 166.
Transitions Involving Intuition XG
Only MCEs perform Intuition XG functions. See Intuition XG on page 153.
Other General Features
These features apply to MCEs as well.
Emergency Bypass
MCPMs provide emergency bypass inputs for program video and audio. The MCPMs use relays on
their backplanes that switch between the program signal path and the emergency bypass inputs. A