The class of computations whose correctness depends not only on whether the result is the correct one, but also on the time at which the result is delivered Real-time applications are those that perform any real-time computations
Pertains to a data collecting system that controls an on-going process and delivers its outputs (or controls its inputs) not later than the time when these are needed for effective control
An on-line computer that generates output nearly simultaneously with the corresponding inputs Often, a computer system whose outputs follow its inputs by only a very short delay
Generally used to describe systems that must guarantee a response to an external event within a given time
Of or relating to a time frame that matches the human perception of time or the rate of an external process
is an operating system that responds to an external event within a short and predictable time frame
The description for a system that responds to an external event, unlike a batch or time-sharing system, within a short and predictable time frame
from Burns and Wellings (Burns & Wellings, 2001), ``any information processing activity or system which has to respond to externally generated input stimuli within a finite and specified delay '' in hard real-time systems, it is ``absolutely imperative that responses occur within the specified deadline'' in soft real-time systems, ``response times are important, but the system will still function correctly if deadlines are occasionally missed '' from the list of frequently asked questions for the comp realtime newsgroup, ``A real-time system is one in which the correctness of the computations not only depends upon the correctness of the computation but also upon the time at which the result is produced If the timing constraints of the system are not met, system failure is said to have occurred ''
Access to the telescope is controllable via a web browser across the internet; results are displayed on the screen as they are captured by the imaging camera This type of access requires a permanent, fast internet connection, and limits access to a single user at any given time
Without any of the delays associated with long distance transmission We speak of 'real-time' virtual experiences because they occur as they might do in reality, not slowed down nor speeded up, and responding to input instantaneously A 'real-time voice interface', therefore, might normally be called a 'conversation'
A communication exchange without any noticeable delays induced by the network Examples include phone calls, videoconferences, ideally, Web browsing RM cells (Resource Management cells) Management cells used to share congestion and flow control information in the ABR service category Router A computer that forwards packet through a network using information contained in the packet headers A router typically maintain routing tables which enable it to select the best outgoing link for forwarding the packet to the next router RS232 A data communication industry standard for the serial transmission of information Distance without modems is limted RS485 A data communication industry standard for the component transmission of information RSVP (Resource Reservation Tool) A draft IP standard that allows an application to request bandwidth and proritziation for real-time information flows
of or relating to computer systems that update information at the same rate they receive information
(Ticaret) The processing and visibility of transactions and information as they occur, and not on a periodic or batch basis
The characteristic of determinism applied to computer hardware and/or software A real-time process must perform a task in a determined length of time For example, a typical "normal" program may be considered to perform correctly if it behaves as expected and gives the right answer A real-time program is considered to be correct only if it gives the right answer within a specified deadline In other words, "real-time" adds a time constraint to the notion of a program being correct The phrase "real-time" does not directly relate to how fast the program responds, even though many people believe that real-time means real-fast This is a direct fall-out from the fact that it is easier to meet deadlines with a fast system However, many operating systems now run on powerful hardware and are "fast", but that speed does not necessarily imply "determinism" Determinism is more important than average speed for real-time systems
Describes an application which requires a program to respond to stimuli within a very small upper limit of response time (opposite: delayed)
In MIDI, there are two types of recording procedures: (1) real-time; (2) step-time The former resembles traditional recording--as with a tape recorder Step-time recording is really sequential: note-by-note, chord-by-chord
In a strict sense, real-time refers to applications that have a time critical nature Consider a data acquisition and control program for an automobile engine Assume that the data must be collected and processed once each revolution of the engine shaft This means that data must be read and processed before the shaft rotates another revolution, otherwise the sampling rate will be compromised and inaccurate calculations may result Contrast this with a program that prints payroll checks The speed at which computations are made has no bearing on the accuracy of the results Payroll checks will be generated with perfect results regardless of how long it takes to compute net pay and deductions See also hard real-time and softRealtime
The term "real-time" means to incur immediately For credit card processing, this means that the validity of a customer's credit card, as well as their available credit limit can be checked immediately before processing is accepted This is extremely important for card-present and Internet transactions, in which it is difficult and costly to get back in touch with the customer
Data is outputted as it is being read from the magnetic stripe, i e at a varying rate with manual readers; opposite of buffered
Refers to effects that take place as you listen, without a noticeable delay For example, when you move the sliders on Blaze Audio's WebEQ, the equalization changes as you move them