isochronous


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Related to isochronous: isochronous governor

isochronal

, isochronous
occurring at equal time intervals; having a uniform period of vibration or oscillation

isochronous

[ī′sä·krə·nəs]
(physics)
Having a fixed frequency or period.

isochronous

(communications)
/i:-sok'rn-*s/ A form of multiplexing that guarantees to provide a certain minimum data rate, as required for time-dependent data such as video or audio.

Isochronous transmission transmits asynchronous data over a synchronous data link so that individual characters are only separated by a whole number of bit-length intervals. This is in contrast to asynchronous transmission, in which the characters may be separated by arbitrary intervals, and with synchronous transmission An isochronous message protocol assigns each data source a fixed amount of time to transmit (its "slot") within each cycle through the sources. That guarantees that each source will have regular opportunities to transmit the latest information. If a source has no more data to transmit, then the rest of its time slot is wasted. If it has more to send than will fit in its slot, it has to either store the excess data and transmit it in its next slot, or discard it.

Note that whether messages are isochronous or asynchronous is independent of whether the transmision of individual bits is synchronous or asynchronous.

Isochronous communication suits applications where a steady data stream is more important than completeness and accuracy, e.g. video conferencing.

Asynchronous Transfer Mode and High Performance Serial Bus can provide isochronous service.

Compare: plesiochronous.

[ANIXTER, LAN Magazine 7.93]

isochronous

Time dependent. Real-time voice, video and telemetry are examples of isochronous data.
References in periodicals archive ?
Using isochronous windows as input while shifting the starting points [??] along the time axis produces time-resolved information about the degree of correlation:
Liu, "Center and isochronous center conditions for switching systems associated with elementary singular points," Communications in Nonlinear Science and Numerical Simulation, vol.
The formal change of differential symbol d to the symbol of virtual displacement [delta] in (I.3) corresponds to imaginary freezing of time variable t and gives the following expression for the isochronous variation [mathematical expression not reproducible] of the vertical coordinate [mathematical expression not reproducible]:
Asynchrony and Isochrony are correctly viewed as service requirements of network applications: Personto-person applications such as telephony and videoconferencing are inherently isochronous applications that produce long-lasting streams of datagrams spaced at regular intervals.
(2) Pre-incisive: isochronous beginning and subsequent end of soil formation;
Fuel savings result from an isochronous engine speed and torque control system - which reduces engine speed during light-load conditions.
It is these factors, incidentally, that contribute to intonational phrases being widely perceived as isochronous, (6) a key issue for Williams' triadic-line verse and much other short-lined free verse felt to have a roughly isochronous, temporal measure.
Ross, "Internalized timing of isochronous sounds is represented in neuromagnetic [beta] oscillations," The Journal of Neuroscience, vol.
The device has a bit performance of 1 nanosecond (ns) and can connect up to 128 drive axes with isochronous operation of about 250 microseconds.
Our data shown that terazosin can reveal inhibit proteasome activity as well as cell survival in a time-dependent manner, but these influences were not isochronous suggesting that proteasome activity inhibition caused by terazosin may partially mediated the subsequent cell apoptosis.
Literatures [4,5] have applied the method of inverse integrating factor to analytically compute global shape of the limit cycles bifurcated from analytic isochronous center.