Takahiro Yoshida Erika Yamazaki Seiichiro Hangai Spoken Word Recognition from Side of Face Using Infrared Lip Movement Sensor. 132-140 2008 PIT http://dx.doi.org/10.1007/978-3-540-69369-7_15 conf/pit/2008 db/conf/pit/pit2008.html#YoshidaYH08