Printer Friendly
Dictionary, Encyclopedia and Thesaurus - The Free Dictionary
3,589,263,199 visitors served.
forum Join the Word of the Day Mailing List For webmasters
?
Dictionary/
thesaurus
Medical
dictionary
Legal
dictionary
Financial
dictionary
Acronyms
 
Idioms
Encyclopedia
Wikipedia
encyclopedia
?

isochronous

   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]
How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content.
?Page tools
Printer friendly
Cite / link 		Feedback
Mentioned in?  References in periodicals archive?   Encyclopedia browser?   Full browser?
No references found
 
The new switch allows users to design isochronous real-time Ethernet segments.
Compact and space-saving Industrial Ethernet switches by Food Trade Review
The case for anthropogenic global warming necessarily rests upon the presumptions that (1) the sun is an isotropic and isochronous radiator, and (2) that the energy density of space, filled with electromagnetic radiation across the entire electromagnetic spectrum from trillions of cosmic radiators, is a constant.
Global warming by Muhlenberg, John D.S. / The New American
0 high-speed, high-bandwidth isochronous pipe transfer, it provides 30 frames per second uncompressed video data at VGA resolution or operates at high resolution (SXGA) at 30 frames per second.
CRESCENTEC WEB CAM CONTROLLER MEETS USB 2.0 COMPLIANCE by Imaging Update
 
 
 
Encyclopedia
?

Terms of Use | Privacy policy | Feedback | Copyright © 2012 Farlex, Inc.
Disclaimer
All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional.