Tetsuo Tajiri Yutaka Suzuki Shinji Nishimura Hiroshi Yoshimura Single board video codec for ISDN visual telephone. 2853-2856 1991 ICASSP https://doi.org/10.1109/ICASSP.1991.150997 conf/icassp/1991 db/conf/icassp/icassp1991.html#TajiriSNY91