Synonymdelta frame.

Encoding in which signal significant conditions represent binary data, such as "0" and "1", and are represented as changes to succeeding values rather than with respect to a given reference.
Note: An example of differential encoding is phase-shift keying (PSK) in which the information is not conveyed by the absolute phase of the signal with respect to a reference, but… (Read More →)

Encoding in which (a) data and clock signals are combined to form a single self-synchronizing data stream, (b) one of the two bits, i.e., "0" or "1", is represented by no transition at the beginning of a pulse period and a transition in either direction at the midpoint of a pulse period, and (c) the other is represented by a… (Read More →)

In an optical fiber, the variation in attenuation among the propagating modes.

In an optical fiber, the variation in propagation delay that occurs because of the different group velocities of different modes. Synonym multimode group delay.

1. Interference that causes a change in potential of one side of a signal transmission path relative to the other side.
2. Interference resulting from an interference current path coinciding with the signal path.

Modulation in which the choice of the significant condition for any signal element is dependent on the significant condition for the previous signal element.
Note: An example of differential modulation is delta modulation.

Phase-shift keying that is used for digital transmission in which the phase of the carrier is discretely varied (a) in relation to the phase of the immediately preceding signal element and (b) in accordance with the data being transmitted.

Pulse-code modulation in which an analog signal is sampled and the difference between the actual value of each sample and its predicted value, derived from the previous sample or samples, is quantized and converted, by encoding, to a digital signal.
Note: There are several variations of differential pulse-code modulation.

In an optical source or detector, the slope of the curve relating output quanta to input quanta.