A switch that performs time-division-multiplexed switching of digitized signals.
Note 1: When used with analog inputs, analog-to-digital and digital-to-analog conversion are required. These functions may be performed by the digital switch.
Note 2: Implementation is accomplished by the interchange of time slots between input and output ports on a sequential basis under the direction of control systems. The control systems… (Read More →)

Switching in which digitized signals are switched without converting them to or from analog signals.

Synchronization based on the start of a transmitted digital data unit, such as a bit, character, block, or frame.

Any technology, using any of several digital encoding schemes, used in connection with the transmission and reception of television signals. Depending on the transmission medium, DTV often uses some type of digital compression to reduce the required digital data rate. Except for artifacts of the compression, DTV is more immune (than analog television) to degradation in transmission, resulting in a… (Read More →)

A generic term for the functions associated with accessing one or more channels within a digital signal for the purpose of testing. DTAU functionality may be embedded within a network element (NE) or may consist of stand-alone equipment. [T1.216-1998]

A group of digitized voice or data channels or both with bit streams that are combined into a single digital bit stream for transmission over communications media.
Note: Digital transmission groups usually are categorized by their maximum capacity, not by a specific number of channels. However, the maximum digital transmission group capacity must be equal to or greater than the… (Read More →)

A transmission system in which (a) all circuits carry digital signals and (b) the signals are combined into one or more serial bit streams that include all framing and supervisory signals.
Note: A-D/D-A conversion, if required, is accomplished external to the system.

See digital transmission system.

See DVD.

A video (television) signal represented by computer-readable binary numbers that describe luminance levels as well as a finite set of colors.