Considering the difficulty in obtaining high quality transcriptions, some researchers proposed speech summarization systems with non-lexical features (Inoue et al., 2004;Koumpis and Renals, 2005;Maskey and Hirschberg, 2003;Maskey and Hirschberg, 2006).
there does not exist any empirical study on speech summarization without lexical features for Mandarin Chinese sources.