| 摘要 |
PURPOSE:To rewrite only a PCM audio area by using two rotary heads to record and reproduce both video signal and data signal areas separately from each other and also using a control circuit by turning off a fixed erasion head in a post-recording mode and actuates a flying erasion head. CONSTITUTION:The reproduction signal is extracted out of a magnetic tape 2 where the PCM audio and video signals are recorded, and only a PCM audio area undergoes the post-recording. In such a case, a control circuit 16 turns off a switch 15a which supplies the power to a drive circuit 14a of a fixed erasion head 6 as long as the priority is given to the post-recordiong mode. Then a switch 15b is turned on to apply the power to a drive circuit 14b of flying erasion heads 9a and 9b. Thus both heads 9a and 9b are actuated. At the same time, a switch 12 is changed to the reproduction side for video signal areas 8 and 8' in the post-recording mode. While the switch 12 is changed to the recording side in a PCM audio areas 7 and 7'. A recording amplifier 10 delivers the PCM audio signal in the post-recording mode. |
