Building Integrated Timing Systems

A unit used to express the linear bit density of data in storage.
Note: The abbreviation "bpi" is not in accordance with international standards, and is therefore deprecated.

In a digitized image, the number of bits used to represent the luminance (brightness, gray scale) and chroma (color) information contained in each pixel. Synonym bit depth.

A unit used to express the number of bits passing a designated point per second.
Note 1: For example, for two-condition serial transmission in a single channel in which each significant condition represents a bit, i.e., a 0 or a 1, the bit rate in bits per second and the baud have the same numerical value only if each bit… (Read More →)

Abbreviation for bus interface unit. See network interface device.

1. [A] designation applied to telecommunications and automated information systems, and to associated areas, circuits, components, and equipment, in which only unclassified signals are processed.
Note: Encrypted signals are unclassified. [NIS]
2. Designation applied to information systems, and to associated areas, circuits, components, and equipment, in which national security information is not processed. [INFOSEC-99]

A generic term for a single-purpose device having limited functionality.
Note: A black box is usually represented in schematic drawings as a geometric figure, possibly with defined connector(s), but no details with respect to the type or number of internal components that enable it to perform its defined task.

A composite color video signal comprised of sync, color burst, and black video.
Note: Black burst is used to synchronize (genlock) other video sources to the same sync and color information. Black burst generators are used in video studios to "lock" the entire facility to a common signal ("house sync" or "house black"). [After Silicon]

1. In facsimile systems using amplitude modulation, that form of transmission in which the maximum transmitted power corresponds to the maximum density of the subject.
2. In facsimile systems using frequency modulation, that form of transmission in which the lowest transmitted frequency corresponds to the maximum density of the subject.

Of a television baseband signal (e.g., NTSC composite video), the voltage level corresponding to black or to the maximum limit of black peaks.