MOTU Digital Timepiece Instruction Manual download pdf (Page 144)

APPENDIX A: GLOSSARY

142

Guard Track: An empty track adjacent to the LTC

track on a multitrack tape recorder. A guard track

prevents crosstalk from another track, which can

interfere with the time code and cause synchroni-

zation problems.

Hard Record: A mode on a VTR that erases and

records all tracks simultaneously.

Horizontal Blanking: A short period of time in the

video display process in a CRT when the electron

beam is shut off to retrace to the next horizontal

scan line (similar to a carriage return on a

typewriter).

House Sync: A process in which all video

equipment in a studio is connected to and genlocks

to a single video sync generator.

Input cable: One of the eight (or sixteen) MIDI IN

jacks in a MIDI Time Piece network.

Insert Record: A mode on a VTR that records on

the video tracks without recording on the audio

tracks, or vice versa.

Jam Sync: The process of creating fresh, error-free

time code or extending existing time code on tape

by locking a time code generator to existing code.

LCD: Liquid Crystal Display. The alpha-numeric

display on the front panel of the MIDI

Timepiece AV.

LT C : Longitudinal Time Code. The Society of

Motion Picture and Television Engineers (SMPTE)

time code format, expressed in audio form as an

80-bit binary audio signal, that describes the

location of each frame on ﬁlm, video, or audio tape

in hours, minutes, seconds, and frames. LTC’s

video counterpart is VITC (Vertical Interval Time

Code), which is the same time code format in the

form of a video signal. In audio production, LTC is

often referred to as SMPTE or SMPTE time code

since VITC is seldom used.

MIDI: Musical Instrument Digital Interface. An

information protocol developed in the early 1980’s

by synthesizer and electronic instrument

manufacturers to allow devices to communicate

musical performance data to one another.

Modiﬁer: A command, or set of commands, that

changes one or more of the MIDI Timepiece AV’s

internal settings.

MTC: MIDI Time Code. A form of time code,

digitized within the MIDI format, that expresses

time in hours, minutes, seconds, and frames, just

like SMPTE time code (LTC and VITC).

Network: Two MIDI Time Pieces connected via

their NETWORK serial ports with a mini-DIN 8

cable.

Non-drop Frame: A SMPTE time code format that

does not drop any frames. Its counterpart, Drop

Frame, skips over the ﬁrst two frames of every

minute (except every 10th minute). Non-drop is

the least confusing format and should be used

unless Drop Frame is required. Drop-frame is

required only with color video programs in which

the SMPTE time code numbers must precisely

match the actual elapsed time.

NTSC: National Television Systems Committee

Format. A system of coding color information for

broadcasting television formulated by the NTSC.

NTSC uses 30 frames per second for black and

white and 29.97 frames per second for color.

Output cable: One of the eight (or sixteen) MIDI

OUT jacks in a MIDI Time Piece network.

PAL/SECAM: Phase Alternate Line. A system of

coding color information that is similar to (but

incompatible with) NTSC format. PAL/SECAM

uses 25 frames per second.

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