Hajime Takeuchi

System for precisely editing audio signals on a videotape

An editing system for audio signals recorded on magnetic tape comprises a helical scan video tape recorder including a circuit for recording and reproducing the audio signals longitudinally on the magnetic tape, an address signal reproducing circuit for reproducing an address signal recorded on the tape, a tape transporting mechanism for moving the tape, a mode selecting circuit for selecting an operating mode of the video tape recorder, and a circuit for generating pulse signals corresponding to a moving speed of the tape; a monitor circuit for monitoring the audio signals reproduced by the video tape recorder; and an editing control circuit including a speed control circuit for controlling the tape transport mechanism to change the speed of the tape and thereby locate an editing point on the tape, an address signal reading circuit for reading the address signal supplied from the video tape recorder, a counting circuit for counting the pulse signals, a memory for storing output signals from the reading circuit and the counting circuit which are generated when the tape is positioned at the editing point, and a controller circuit for controlling the mode selecting circuit in response to the output signals stored in the memory.