Patent ID: 6493707
Filing Date: 2002-12-10
Classification: G06F,Y10S

Abstract:
A method for finding documents which relate to a portion of a temporal document, comprising:(a) in response to a signal of interest at a particular time during the temporal document, identifying a portion of the temporal document for which related documents are to be found; (b) selecting text associated with the portion of the temporal document identified, by reference to a buffer wherein is stored each term in text associated with the temporal document, together with a time in the temporal document at which the term occurs; (c) weighting each term in the text selected by a function W(t) according to the time t at which the text occurs relative to the time at which the signal of interest occurs; (d) finding the related documents by use of information retrieval techniques as applied to the text selected; wherein each term in the text associated with the temporal document is determined as that portion of the document is accessed, and is stored in a buffer together with the time in the temporal document at which the term occurs; and wherein W&it;(t)=W&it;â€ƒ&it;t1,t2&af;(t)=&AutoRightMatch;&it;&Integral;k=0t&it;(1-exp&it;(-t1))*exp&it;(-t1&it;k)*(1-exp&it;(-t2))*exp&it;(-t2&it;(t-k)),where t1 and t2 are constants.