(from the Greek "equal" and "time"; pronounced "eye-SAH-krun-us") Signal delivery capability at a specified rate, suitable for continuous data such as full-motion video and voice. Pertains to processes that require timing coordination to be successful, such as voice and digital video transmission. A sound or picture going from a peripheral computer device or across a network into a computer or television set needs to arrive at close to the same rate of data flow as the source. In feeding digital image data from a peripheral device (such as a video camera) to a display mechanism within a computer, isochronous data transfer ensures that data flows continously and at a steady rate in close timing with the ability of the display mechanism to receive and display the image data.
Refers to processes where data must be transmitted within certain time constraints, for example when streaming audio and video simultaneously for a multimedia event. Less rigid than synchronous transmission (see entry).
A communication service that requires access to guaranteed, regular time slots, such as voice telephony.
Isochrony refers to the idea that English has a strong tendency towards being a stress-timed language, i.e., that beats fall at roughly equal intervals and that we speed up or slow down the syllables between beats to make the beats equally spaced. There has been debate whether this isochrony is objective or a matter of perception but certainly the perception of English as isochronous is undeniable.
The term Isochronous comes from the Greek works "iso" for equal and "chronous" for time and has to do with the time-sensitive transmission of data. Voice and video transmission equipment need Isochronous transmission because this method enables the communication to happen in real time. Isochronous transmission delivers voice and video data without detracting from the natural style of conversation taking place between several parties.
Equal or uniform in time. [ 23
equal in duration or interval; "the oscillations were isochronal"
Signals which are dependent on some uniform timing or carry their own timing information embedded as part of the signal. Voice and video are isochronous signals, but data transfer is generally not.
Used to describe the transmission of continuous media, implying finite size data samples generated at fixed intervals.
From the Greek for "equal" and "time," isochronous data transfer pertains to processes that require timing coordination to be successful, such as voice and digital video transmission.
Edit / Time-dependent. Pronounced eye-sock-ra-nuss, it refers to processes where data must be delivered within certain time constraints. For example, multimedia streams require an isochronous transport mechanism to ensure that data is delivered as fast as it is displayed and to ensure that the audio is synchronized with the video. Isochronous can be contrasted with asynchronous, which refers to processes in which data streams can be broken by random intervals, and synchronous processes, in which data streams can be delivered only at specific intervals. Isochronous service is not as rigid as synchronous service, but not as lenient as asynchronous service. Certain types of networks, such as Asynchronous Transfer Mode (ATM), are said to be isochronous because they can guarantee a specified throughput. Likewise, new bus architectures, such as IEEE 1394, support isochronous delivery. Information regarding Isochronous transport over IP/Ethernet is available in RFC1257 See Also: IEEE-1394 Asynchronous Transfer Mode
For digital transmission, isochronous is the transmission of data indicating that the timing or synchronizing signal is derived from the signal carrying the data. Using an isochronous connection users are guaranteed continuous bandwidth without interruption.
Transmit RF energy at a regular interval, typified by time-division voice systems. Isochronous voice UPCS devices operate at 1920-1930 MHz.
A descriptor signifying enabling network characteristics. This includes the ability to simultaneously transport disparate data types (voice, video, and data), across the same circuit. It also includes the capability to dynamically allocate bandwidth as the application warrants.
Isochronous means having an equal time difference or occurring simultaneously. For example, a pendulum's oscilliation is isochronous, regardless of amplitude. If a diagram is drawn, 'contour' lines connecting periods of equal time difference are called isochrones.
