57. A method of indexing and searching timed media files, as recited in claim 56 , wherein said processing of language contained within the timed media file includes segmenting said language into sentences; and said calculation of a centrality number of at least one occurrence of at least one information representation is based on the position of said occurrence within the grammatical structure of the sentence that contains the occurrence.
56. A method of indexing and searching timed media files, as recited in claim 25 , further comprising the step of calculating a centrality number for at least one occurrence of at least one information representation contained within the timed media file.