Appendixes
UMID
Unique Material Identifier. A standard (SMPTE 330M) for video and audio metadata. The Basic section of a UMID contains a globally unique number and a material number for the identification of recorded material. An optional section called the “Source Pack” contains information such as the time and location of recording. A UMID with the Basic section only is called a Basic UMID. A UMID with the Source Pack is called an Extended UMID.
User bits
A total of 32 bits are provided in the time code which the user can use to record such information as date, scene number, or reel number on video tape. Also called user’s bits.
VBS
A composite signal consisting of video signal, burst signal and sync signal.
Vertical smear
A bright vertical line which appears on the screen when shooting a very bright object with a CCD camera.
Also called smear.
Video gain
Amount of amplification for video signals, expressed in decibels (dB).
VITC
Vertical Interval Time Code. A time code recorded in two horizontal lines during each vertical blanking period of a video signal.
White balance adjustment In the light of a particular color temperature, to adjust the white levels of the R, G, and B channels of a color video camera so that any white object shot in that light is reproduced as a truly white image. See also Color temperature.
White shading
When shooting a white object, the upper and lower portions of the screen may appear magenta or green while the central portion appears white, depending on the performance
of the camera lens. This is called white shading.
Zebra pattern
In a video camera, striped patterns which appear in the viewfinder screen to indicate areas of the image where the video level is higher than a certain value. If a zebra pattern appears on the skin when the object is a human being, that is a correct exposure.
Zoom
To gradually change the field of view of a camera lens from wide to narrow angle (zoom in) or narrow to wide angle (zoom out).
210 Glossary