Patent ID: 7359891
Filing Date: 2008-04-15
Classification: G06F,Y10S

Abstract:
1. A hot topic extracting method for extracting a trend, a fashion, a noticed word, or a concept as a hot topic from a plurality of documents which exist in a wide-ranging information source on a network, the method comprising: collecting a plurality of documents, each collected document having corresponding location information indicating a location from which the respective, collected document was found; storing the collected documents in a storage unit with date and time information indicating a collection date and time added to the collected documents; assigning weights to stored documents according to the date and time information; collecting a new document from an information source, the newly collected document having corresponding location information indicating a location from which the newly collected document was found; retrieving from the storage unit, a stored document having corresponding location information that matches the location information of the newly collected document; extracting, from the retrieved document, words or a phrase and counting a frequency of the occurrences of the extracted words or phrase, and obtaining a broader concept word of an extracted word and counting a frequency of the occurrences of the broader concept word, based on the assigned weights; and extracting said words or phrase, and said broader concept word, having occurrence frequency and document frequency equal to or higher than an average and an expected value, as the hot topic.