A type of delta modulation in which the size of the steps of the approximated signal is progressively increased or decreased as required to make the approximated signal closely match the input analog wave.

In digital facsimile, density step lines in the recorded copy resulting from analog-to-digital conversion when the object, i.e., the original, has observable shades of gray between the smallest density steps of the digital system.

1. In display systems, the relation between the intensity of color or brightness of an area occupied by an element or an image and the intensity of the area not occupied by that element or image. Deprecated synonym brightness ratio.
2. In optical character recognition, the difference between color or shading of the printed material on a document and the… (Read More →)

In B-ISDN applications, the use of broadband transmission of audio or video information to the user for post-production processing and distribution.

A collection of control attributes associated with a security object [ECMA138].

1. Attributes, associated with a security object, that when matched against the privilege attributes of a security subject, are used to grant or deny access to the security object [ECMATR46].
2. Attributes associated with an object that, when matched against security attributes of a subject, are used to grant or deny access to that object [POSIX.6].

Synonym trackball.

A character that initiates, modifies, or stops a function, event, operation, or control operation.
Note: Control characters may be recorded for use in subsequent actions. They are not graphic characters but may have a graphic representation in some circumstances.

The branch of technology devoted to the design, development, and application of communications facilities used specifically for control purposes, such as for controlling (a) industrial processes, (b) movement of resources, (c) electric power generation, distribution, and utilization, (d) communications networks, and (e) transportation systems.

In a protocol data unit (PDU), the field that (a) contains data interpreted by the receiving destination logical-link controller (LLC) and (b) may be the field immediately following the destination service access point (DSAP) and source service access point (SSAP) address fields of the PDU.