Sawtooth waveform

A form of signal resembling the teeth of a saw. A video signal having a sawtooth waveform is used to check linearity and other characteristics of video amplifiers.

Shot data

Data recorded, while shooting, in the color bars, the U-BIT data of the VITC, and so forth. Includes the model name, serial number, date, time, shot number, cassette number, and ID1 to ID4.

Shutter speed

The length of time for which the shutter stays open. The higher the shutter speed, the more clearly a moving object can be shot.

Smear

See Vertical smear.

SMPTE

A Society of Motion Picture and Television Engineers, a professional association established in the U.S.A. mainly for the purpose of setting forth motion picture and television engineering standards.

S/N

Signal-to-Noise ratio. The relation of the strength of the desired signal to the accompanying electronic interference, the noise. If S/N is high, sounds are reproduced with less noise and pictures are reproduced clearly without snow.

Time code

A digitally encoded signal which is recorded on video tape to identify each frame of video by hour, minute, second and frame number. SMPTE time code is applied to NTSC system, and EBU time code to PAL and SECAM systems. There are two kinds of recorded signals : longitudinal time code (LTC) and vertical interval time code (VITC). See also LTC and VITC.

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