Patent ID: 8126897
Filing Date: 2012-02-28
Classification: G06F

Abstract:
1. A method for information retrieval, comprising: extracting from a video document visual data items and textual data items that occur in the document at respective occurrence times; constructing and storing in a memory indexing records, which index both the visual and the textual data items by their respective occurrence times; accepting a search query comprising a visual query term and a textual query term; based on the occurrence times stored in the indexing records, identifying in the video document at least one time interval that contains at least one visual data item matching the visual query term and at least one textual data item matching the textual query term, wherein identifying the at least one time interval comprises identifying one or more time intervals, each of which contains a respective first occurrence of the visual data item and a respective second occurrence of the textual data item and meets a predefined temporal proximity criterion between the first and second occurrences, as the at least one time interval; and reporting the at least one identified time interval in response to the search query.