초록 ▼

Method and apparatus for selecting data wherein the acceptability of the data is a function of a measurable quality, such as duration, of a specific event relative to the current average, or other statistical threshold, of such quality of a number of events. The magnitude of event characteristic is

Method and apparatus for selecting data wherein the acceptability of the data is a function of a measurable quality, such as duration, of a specific event relative to the current average, or other statistical threshold, of such quality of a number of events. The magnitude of event characteristic is measured and provided as a signal. Deviations from the threshold are provided to an up-down counter in which the threshold is stored and, accordingly, updated. If the event magnitude, as registered in an up-counter, exceeds the updated threshold stored in the up-down counter, a digital comparator indicates this and up counts the up-down counter to the extent the event exceeds the threshold. If the event magnitude is less than the stored threshold, the up-down counter is down-counted an amount corresponding to the difference between the event magnitude and the stored threshold. A currently updated threshold is thus maintained in the up-down counter. Weighting can be provided by, for instance, varying the clock frequency of the up-count, and the clock frequency of the down-count, to the up-down counter.

대표청구항 ▼

A system for generating a currently updated statistical datum threshold, comprising: an up-down counter, an up-counter, a digital comparator connected to both the up-down counter and the up-counter and responsive to an equivalency of count in the up-counter and the up-down counter, means for generat

A system for generating a currently updated statistical datum threshold, comprising: an up-down counter, an up-counter, a digital comparator connected to both the up-down counter and the up-counter and responsive to an equivalency of count in the up-counter and the up-down counter, means for generating a digital input signal at least proportional to a signal measuring the magnitude of a parameter of an event, the digital input signal being applied to the up-counter, latch means to maintain the digital input signal at least until response by the digital comparator indicating equivalency of count between the up-counter and the up-down counter, down-count means providing a signal initiated by completion of the signal measuring the event parameter magnitude prior to response by the digital comparator and terminated by response by the digital comparator, the down-count means signal being ultimately applied to the down-count input of the up-down counter as a down-count frequency, up-count means providing a signal initiated by response from the digital comparator prior to completion of the signal measuring the event parameter magnitude and terminated by completion of the signal measuring the event parameter magnitude, the up-count means signal being ultimately applied to the up-count input of the up-down counter as an up-count frequency, and means to reset the up-counter upon both termination of the signal measuring the magnitude of a parameter and response from the digital comparator, whereby the magnitude of the signal measuring the event parameter is compared to a statistical signal magnitude threshold of previous signals stored as the count in the up-down counter, the count of the up-down counter is appropriately updated corresponding to the magnitude of the specific event signal relative to the statistical threshold stored in the up-down counter, and the up-count means and down-count means can be utilized to accept or reject datum of a specific event as a function of the specific event datum relative to the statistical threshold.