A video signal recording apparatus is provided with first and second channels for transmitting an input video signal. The first channel has a line memory for conducting a 1H delay on data and a time-base-extension line memory for conducting time base extension on the data with the 1H delay. The data...http://www.google.com.tw/patents/US5295024?utm_source=gb-gplus-share專利 US5295024 - Method and apparatus for two-channel recording of video signals
