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isochronous
(redirected from isochronously)

    Also found in: Dictionary/thesaurus, Medical, Wikipedia 0.01 sec.
isochronous
Time dependent. Real-time voice, video and telemetry are examples of isochronous data.
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.
(communications)isochronous - /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]
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1986) who suggested that with the maintenance of acid-base balance in the body, urea was isochronously synthesized with ammonia production so that nitrogen excretion remained constant.
The optimum methionine to methionine plus cystine ratio for growing ... by Shiyan, Qiao; Xiangshu, Piao; Zhanyu, Feng; Yuhua, Ding; Longyao, Yue; P.A., Thacker / Asian - Australasian Journal of Animal Sciences
In metrical systems based on stress patterns, the tendency is for the stresses to be isochronously spaced; this is manifestly the case in the musical settings considered here.
Accent and metre in later Old French verse: the case of the ... by Maw, David / Medium Aevum
 
 
 
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