Patent Document ID: 9323845
Application ID: 13577149

Base Claim:
1. A portable communication device for extracting a user interest, the device comprising: a term vector generation unit for generating, based on types of text data stored in the portable communication device, a term vector representing each text data; a subject classification tree storage unit for storing a subject classification tree, which is a tree structure in which multiple nodes, each including at least one training data and representing a subject, are connected to one another; a subject classification tree generation unit for generating the subject classification tree by processing open directory data; a training data generation unit for generating the training data representing each directory based on text data information of a set of web sites included in the each directory of the open directory data; a classification unit for mapping the training data to a directory included in the subject classification tree; and a similarity calculation unit for calculating a similarity between the term vector and the training data for each node in the subject classification tree, wherein the similarity calculation unit extracts a node name representing the user interest from the subject classification tree based on the similarity.

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Claim 3:
3. The portable communication device for extracting a user interest of claim 1 , wherein the similarity calculation unit calculates the similarity between the term vector and the training data included in each node of the subject classification tree, and for each node of the subject classification tree, a parent node's similarity is calculated by summing up all its children's similarities.