VIDEO RECORDING METHOD BY CORDLESS UNATTENDED DIVING DEVICE

摘要

PURPOSE:To record only a desired video image accurately and sharply by outputting a video recording start stop signal to a changeover circuit synchronously with a time when a picture signal the same picture signal displayed on a monitor is outputted from a picture memory while a command signal is given so as to operate/stop a video recorder. CONSTITUTION:A supervisor (not shown) on a control vessel 12 always monitors a video image on a video monitor 24 and turns on a recording start switch (not shown) of a command device 32 of a video remote controller 30 when a picture requiring recording is displayed. When the video recording start signal is received by a receiver 40, the signal is given to a time reference circuit 46 via a filter amplifier 42 and a demodulator 44. An output signal of the time reference circuit 46 is outputted when the recording start switch 32 is closed synchronously with a time when a color signal inputted to a picture memory 28 is outputted from the picture memory 28 simultaneously with the picture displayed on the video monitor 24. Then a changeover circuit 29 is closed and the video recorder 48 starts recording.