On a separate front, with the popularity of the Internet and the increasing development of the digital storage capacity, unprecedented volumes of multimedia information, such as broadcast news, lecture recordings, voice mails and video streams, among others, have been quickly disseminated around the world and shared among people.
spoken content processing has become an important and urgent demand (Lee and Chen, 2005;Ostendorf, 2008;Liu and Hakkani-Tur, 2011).