MOTU micro express-USB, Руководство пользователя

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A P P E N D I X A : G L O S S A R Y
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Patch:
In the MIDI Timepiece AV, a patch can be a
base setup, a modifier, a combination of a base
setup with up to four modifiers, or several (up to
four) modifiers by themselves. A patch has a MIDI
program change assignment, which can be called
up by sending a MIDI program change to the MIDI
Timepiece AV.
Script:
An itemized description of the commands
that make up a base setup or modifier. The script is
displayed in the Setups & Modifiers window when
the setup or modifier is selected.
Sequencer:
A computer or software running on a
computer that is capable of recording and playing
back MIDI data.
SMPTE:
Society of Motion Picture and Television
Engineers . The acronym SMPTE is often used in
audio production as a shorthand expression for
SMPTE Time Code .
SMPTE Time Code:
A series of binary impulses that
express the location of each frame on film, video,
or audio tape in hours, minutes, seconds, and
frames. SMPTE has two forms: 1) an 80-bit audio
signal, called
Longitudinal Time Code (LTC), or 2)
a video signal recorded in the vertical blanking
segment of video frames, called
Vertical Interval
Time Code (VITC). In either form, SMPTE Time
Code has four different formats for counting
frames per second (fps): 24 fps, 25 fps, 30 fps, and
Drop Frame. 24 is used mostly with film; 25 is a
European format for film; 30 is the US standard for
audio and video; Drop Frame is required only with
color video programs in which the SMPTE time
code numbers must precisely match the actual
elapsed time.
SMPTE-to-MIDI Converter:
A device that reads
SMPTE time code from audio or video tape and
converts it to MTC or DTL to synchronize MIDI
devices to tape.
Striping:
The process of recording SMPTE time
code.
Switcher/Special Effect Generator:
A machine that
takes multiple video input signals and routes them
to a variety of destinations to add special effects
such as dissolves.
Synchronizer:
A device that reads time code from
audio or video tape and is used to synchronize the
timing of two or more devices.
Time Code Generator:
A device that is capable of
producing LTC, VITC, or both.
Time Code Window: A display of SMPTE time
code numbers on a video screen.
Universal Serial Bus:
An industry standard for
connecting peripheral devices to computers.
USB:
See Universal Serial Bus .
User Bits: 32 unassigned bits in the 80-bit SMPTE
time code word that have been set aside by the
Standards Committee of SMPTE for users to place
their own information in the time code, such as the
shooting date, take identification, reel number, and
so on.
Vertical Blanking: The area on video tape between
video frames, which can be seen as the “black bar”
above or below the picture when the vertical hold is
adjusted. This area is where VITC can be recorded.
Video Field:
One half (1/60th of a second) of a
complete video scanning cycle (one video frame),
which consists of 525 video scan lines. One video
field consists of the odd-numbered scan lines; the
other consists of the even-numbered scan lines.
Video Frame:
One complete video scanning cycle,
which consists of two video fields.
!USB Interfaces Manual Book Page 143 Tuesday, October 10, 2000 12:43 PM