Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Tkahashi Syouichi and Yorozu Masatoshi,NHK Broadcasting Cnter Digital Switching and Distoribution System,ITE Technical Report,0386-4227,The Institute of Image Information and Television Engineers,1991,15,8,7-12,https://cir.nii.ac.jp/crid/1390282679497277952,https://doi.org/10.11485/tvtr.15.8_7