Mandarin multimedia child speech corpus: Cass_Child

In order to deepen the understanding of the nature of first language acquisition, we carry a longitudinal recording of speech production of twenty-three Mandarin-speaking children from one year old to four years old at Chinese Academy of Social Sciences (CASS) in Beijing since 2009. The interactive communication between children and parents is recorded in both audio and video mode. Apart from longitudinal recordings, other three kinds of cross-sectional recording are also conducted. One of them is to invite parents to record their children´s speech production at home through a web-based platform developed by the lab at CASS. Based on these recordings, a multimedia child speech corpus, i.e. CASS_CHILD, is constructed.