Editing Helical scan (section)

==History==
Earl Edgar Masterson from [[RCA]] patented the first helical scan method in 1950.<ref>Patent US2773120</ref><ref>{{cite web | url=https://ethw.org/Magnetic_Videotape_Recording#Helical_Scanning | title=Magnetic Videotape Recording | date=April 2019 }}</ref> German engineer [[:de:Eduard Schüller (Ingenieur)|Eduard Schüller]] developed a helical scan method of recording in 1953 while working at AEG.<ref>[https://books.google.com/books?id=PL0eAQAAMAAJ ''SMPTE Journal: Publication of the Society of Motion Picture and Television Engineers'', Volume 96, Issues 1-6; Volume 96], page 256, [[Society of Motion Picture and Television Engineers]]</ref><ref>{{Cite web |last= |first= |title=Schüller, Eduard - Deutsche Biographie |url=https://www.deutsche-biographie.de/gnd129812749.html#ndbcontent |access-date=2023-09-04 |website=www.deutsche-biographie.de |language=de}}</ref> With the advent of television broadcasting in Japan in the early 1950s, they saw the need for magnetic television signal recording. Dr. Kenichi Sawazaki developed a prototype helical scan recorder in 1954.<ref>{{cite web |title=Toshiba Science Museum : World's First Helical Scan Video Tape Recorder |url=https://toshiba-mirai-kagakukan.jp/en/learn/history/ichigoki/1959vtr/index.htm |website=toshiba-mirai-kagakukan.jp |access-date=14 July 2021}}</ref> Helical scan machines were demonstrated by Toshiba in 1959 and since they recorded one field of video per track, they were the first to allow video to be paused and played back at speeds other than real time. Helical scan type B and type C videotape began to be used in 1976.<ref>{{Cite book|url=https://books.google.com/books?id=Wc00DwAAQBAJ&dq=helical+scan+video+longitudinal&pg=PA119|title=Portable Moving Images: A Media History of Storage Formats|first=Ricardo Cedeño|last=Montaña|date=August 21, 2017|publisher=Walter de Gruyter GmbH & Co KG|isbn=9783110553925 |via=Google Books}}</ref>