Anisochronous
Encyclopedia
In telecommunication
, the term anisochronous refers to a periodic signal, pertaining to transmission
in which the time interval separating any two corresponding transitions is not necessarily related to the time interval separating any other two transitions. It can also pertain to a data transmission
in which there is always a whole number of unit interval
s between any two significant instants in the same block or character, but not between significant instants in different blocks or characters.
In practice, anisochronous typically means that data packets are not arriving in the same order they were transmitted, thus dramatically altering the quality of a multimedia transmission (e.g. voice, video, music), or after processing to restore isochronicity, have had significant amounts of latency added. Isochronous
and anisochronous are characteristics, while synchronous
and asynchronous are relationships.
Telecommunication
Telecommunication is the transmission of information over significant distances to communicate. In earlier times, telecommunications involved the use of visual signals, such as beacons, smoke signals, semaphore telegraphs, signal flags, and optical heliographs, or audio messages via coded...
, the term anisochronous refers to a periodic signal, pertaining to transmission
Transmission (telecommunications)
Transmission, in telecommunications, is the process of sending, propagating and receiving an analogue or digital information signal over a physical point-to-point or point-to-multipoint transmission medium, either wired, optical fiber or wireless...
in which the time interval separating any two corresponding transitions is not necessarily related to the time interval separating any other two transitions. It can also pertain to a data transmission
Data transmission
Data transmission, digital transmission, or digital communications is the physical transfer of data over a point-to-point or point-to-multipoint communication channel. Examples of such channels are copper wires, optical fibres, wireless communication channels, and storage media...
in which there is always a whole number of unit interval
Unit interval
In mathematics, the unit interval is the closed interval , that is, the set of all real numbers that are greater than or equal to 0 and less than or equal to 1...
s between any two significant instants in the same block or character, but not between significant instants in different blocks or characters.
In practice, anisochronous typically means that data packets are not arriving in the same order they were transmitted, thus dramatically altering the quality of a multimedia transmission (e.g. voice, video, music), or after processing to restore isochronicity, have had significant amounts of latency added. Isochronous
Isochronous
Isochronous : From Greek iso, equal + chronos, time. It literally means regularly, or at equal time intervals. In general English language, it refers to something that occurs at a regular interval, of the same duration; as opposed to synchronous which refers to more than one thing happening at the...
and anisochronous are characteristics, while synchronous
Synchronization
Synchronization is timekeeping which requires the coordination of events to operate a system in unison. The familiar conductor of an orchestra serves to keep the orchestra in time....
and asynchronous are relationships.