1. A method of segmenting multimedia data using audio information, comprising: receiving a search request identifying at least one target speaker; retrieving at least one model for the at least one target speaker; and segmenting the multimedia data into one or more target speaker segments and background segments based on feature vectors of the multimedia data and the at least one model for the at least one target speaker, wherein the step of segmenting comprises: reading a first block of frames of the multimedia data; determining a score for the first block of frames based on the at least one model for the at least one target speaker; and determining if the score for the first block of frames is above or below a first threshold.