System and method to perform textual queries on voice communications

摘要

Methods and systems to perform textual queries on voice communications. The system comprises an index service for storing a plurality of audio content data sets for a plurality of voice communications, the plurality of audio content data sets comprising at least three audio content data sets for each voice communication, the at least three audio content data sets comprising a first audio content data set generated using a text-to-speech conversion technique, a second audio content data set generated using a phoneme lattice technique, and a third audio content data set generated using a keyword identification technique. The system also comprises a search engine configured to: receive search criteria from a user, the search criteria comprising at least one keyword; search each of the first, second and third audio content data sets for at least a portion of the plurality of voice communications to identify voice communications matching the search criteria; and combine the voice communications identified by each search to produce a combined list of identified voice communications.