| 摘要 |
PURPOSE:To record a video signal with guard bandless state and to remove crosstalk at the multiple recording of a sound signal with a video signal, by recording sound signals while changing their carrier frequency between tracks on which a video head is set up at the time of reproducing. CONSTITUTION:A video head 19 of a magnetic disc recording device for recording/reproducing is provided with a recording/reproducing mode alteration switch S to turn the switch S to the R and P sides at the time of recording and reproducing respectively. The recording device is provided with a phase modulator 1 inputting a luminance signal Y and the main carrier fr of the signal Y and a rectangular two-phase modulator 9 inputting color signals R-Y, B-Y and carriers fc1, fc2. In addition, the recording device is provided with three FM modulators 10-12 inputting sound signals AD, gates 13-15, a gate pulse generating circuit 17, and a composing circuit 18. Thus, the crosstalk at the multiple recording of the sound signal with the video signal can be removed by recording the sound signal AD so that the carrier frequency of the sound signal AD is different between the tracks on which the head 19 is set up at the time of reproducing. |
