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Rev 2.10 • 17 Feb 11
A. Special Features
Machine Control and Pre-Roll
Machine Control and Pre-Roll
Machine control and pre-roll are two independently configurable master control
options
. Machine
control applies to VTRs, video disk players, video servers, and similar devices that need to be
started, stopped, paused, rewound, and so on. Pre-roll generally applies to tape media (VTRs, etc.)
that need to be tensioned and brought up to speed before playing.
The term “pre-roll” in master control applies
also
to Intuition XG subsystems (which are not tape
players) and to other media where a certain amount of delay must be applied to transitions to
account for playout latency. “Pre-roll” is therefore
also
a generic term applying to a combination of
various pre-roll and delayed playback conditions.
MCEs and new control panels (CECP, CECP M1, FECP, and CECP GUI) support pre-roll and
machine control. MCPMs and older panels do not support these functions.
MCEs enable these options independently. You can have one without the other. Intuition XG, for
example, requires a pre-roll value, but is not subject to machine control.
Each of the MCE’s main sources can be assigned its own machine control parameters and its own
pre-roll values. Each MCE can be assigned a
system pre-roll
value.
S
Pre-roll values for progressive video should be double those of interlaced video.
Any main source in an MCE for which machine control is enabled can specify the following
machine control parameters:
• Type (GPO vs. serial)
• Port
• Default time code mode
• Default transition type and rate
Any main source in an MCE for which pre-roll is enabled can have a pre-roll value (expressed as a
number of frames, from 0 to 300). The MCE also has a system pre-roll value that is applied as
described under
Theory
, following.
Squeeze images taken from among the main sources “inherit” the pre-roll and machine control val-
ues of the main sources. That applies to the squeeze background and to squeeze image 2.
An audio over taken from among the main sources also inherit the pre-roll and machine control val-
ues of the main source.
A master control system that performs machine control must include a DC21 device controller. The
DC21 functions as an intermediary between the MCE and the devices under control (typically
VTRs and video disks). The MCE calculates the timing required to start the various devices used in
a transition, and sends appropriate commands to the DC21, which then sends the appropriate proto-
col commands to the VTRs and other devices.
The DC21 controls up to 4 devices using a serial protocol. The serial protocols supported are Sony,
Odetics, and VDCP. Odetics is much like Sony and master control does not use any Odetics fea-
tures that are not found in the Sony protocol. VDCP means video disc control protocol and applies
to video disk players.
The DC21 can also control up to 16 other devices using 100ms start and stop pulses (via GPO relay
signals).
We do not know whether any device that can be controlled by such pulses exists.
Summary of Contents for NV5100MC Master Control
Page 14: ...xiv Rev 2 10 17 Feb 11 Table of Contents ...
Page 54: ...40 Rev 2 10 17 Feb 11 3 Frames Other Modules ...
Page 92: ...78 Rev 2 10 17 Feb 11 4 MCPMs Other General Features ...
Page 112: ...98 Rev 2 10 17 Feb 11 5 MCEs Summary ...
Page 158: ...144 Rev 2 10 17 Feb 11 6 Control Panels Aux Preview GUI ...
Page 166: ...152 Rev 2 10 17 Feb 11 7 Other MC Products Device Controller ...
Page 224: ...210 Rev 2 10 17 Feb 11 C Misc Information NorthAmerican andInternational PowerCords ...
Page 240: ...226 Rev 2 10 17 Feb 11 Index ...
