Hypervideo: information retrieval using realtime buffers
First Claim
1. 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 where t1 and t2 are constants.
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Accused Products
Abstract
Disclosed is a method and device for selecting documents, such as Web pages or sites, for presentation to a user, in response to a user expression of interest, during the course of presentation to the user of a document, such as a video or audio selection, whose content varies with time. The method takes advantage of information retrieval techniques to select documents related to the portion of the temporal document in which the user has expressed interest. The method generates the search query to use to select documents by reference to text associated with the portion of the temporal document in which the user has expressed interest, as by using the closed caption test associated with the video, or by using speech recognition techniques. The method further uses a weighting function to weigh the terms used in the search query, depending on their temporal relationship to the user expression of interest. The method uses a buffer to save necessary information about the temporal occurrence of terms in the temporal document.
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Citations
24 Claims
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1. A method for finding documents which relate to a portion of a temporal document, comprising:
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(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 where t1 and t2 are constants. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 11, 12)
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9. A method for finding documents which relate to a portion of a temporal document, comprising:
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(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; and
(e) selecting the related documents from among a collection of documents which may be accessed through the Internet, by utilizing databases comprising information about the collection;
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;
wherein the related documents are selected from the collection according to the scores achieved when evaluating documents in the collection according to a formula giving scores to documents depending upon the occurrence in the documents of terms which occur in text associated with the portion of the temporal document identified, where each term is weighted by a function W(t) according to the time t at which the term occurs relative to the time at which the signal of interest occurs; and
wherein a score SD of a document D in the collection may be determined by crediting the document D, for each term T in the temporal portion of the document identified which occurs in the document D, with an amount proportional to W(t), to Robertson'"'"'s term frequency TFTD and to IDFT where W(t) is the weight assigned to a term which occurs at time t relative to the signal of interest, - View Dependent Claims (10)
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13. A device for finding documents which relate to a portion of a temporal document, comprising:
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(a) means for identifying a portion of the temporal document for which related documents are to be found, in response to a signal of interest at a particular time during the temporal document;
(b) means for 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) means for 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) means for 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;
wherein where t1 and t2 are constants. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 23, 24)
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21. A device for finding documents which relate to a portion of a temporal document, comprising:
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(a) means for identifying a portion of the temporal document for which related documents are to be found, in response to a signal of interest at a particular time during the temporal document;
(b) means for 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) means for 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) means for finding the related documents by use of information retrieval techniques as applied to the text selected;
(e) means for selecting the related documents from among a collection of documents which may be accessed through the Internet, by utilizing databases comprising information about the collection;
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;
wherein the related documents are selected from the collection according to the scores achieved when evaluating documents in the collection according to a formula giving scores to documents depending upon the occurrence in the documents of terms which occur in text associated with the portion of the temporal document identified, where each term is weighted by a function W(t) according to the time t at which the term occurs relative to the time at which the signal of interest occurs; and
wherein a score SD of a document D in the collection may be determined by crediting the document D, for each term T in the temporal portion of the document identified which occurs in the document D, with an amount proportional to W(t), to Robertson'"'"'s term frequency TFTD and to IDFT where W(t) is the weight assigned to a term which occurs at time t relative to the signal of interest, - View Dependent Claims (22)
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Specification