13. The EPG generating apparatus according to claim 12 , wherein the maximum clique set comprises a maximum clique whose node must be greater than or equal to a node threshold, and the maximum clique corresponds to an optimum keyword group.
13. The EPG generating apparatus according to claim 12 , wherein the maximum clique set comprises a maximum clique whose node must be greater than or equal to a node threshold, and the maximum clique corresponds to an optimum keyword group. 14. The EPG generating apparatus according to claim 13 , wherein the processor compares the optimum keyword group with the program description to generate an occurrence frequency of a keyword of the optimum keyword group in the program description, and divides the occurrence frequency by the keyword count of the optimum keyword group to generate the match score.