1. A method for indexing high-dimensional data using a signature file in a filtering-based indexing scheme for a multimedia system, the method comprising: receiving information related to index generation, the information including a feature vector of high-dimensional data, an object identifier, a first-level signature file identifier, and a second-level signature file identifier; generating a feature vector file containing the feature vector and the object identifier; obtaining a first-level signature from the feature vector, and storing the obtained first-level signature in a first-level signature file in a database of the multimedia system; and obtaining a second-level signature by using the first-level signature and the feature vector, and storing the obtained second-level signature in a second-level signature file.