| 摘要 |
First (A1) and second (A2) magnetic heads are alternately used to record an analog video signal on a magnetic recording medium while first tracks (Ta1,Ta2,Ta3,Ta4) are sequentially formed thereon. The magnetic recording medium is fed with respect to a rotary drum (10) at a predetermined speed. The first and second magnetic heads are attached to the rotary drum, and are diametrically opposed to each other. The first and second magnetic heads are in a first predetermined height position with respect to the rotary drum. The first and second magnetic heads have different azimuth angles respectively. Third (D1) and fourth (D2) magnetic heads are alternately used to record a digital video signal on the magnetic recording medium while second tracks (Td1,Td2,Td3,Td4) are sequentially formed and written over at least portions of the first tracks on the magnetic recording medium. The third and fourth magnetic heads are attached to the rotary drum, and are diametrically opposed to each other. The third and fourth magnetic heads are in a second predetermined height (d) position with respect to the rotary drum. The second predetermined height position is different from the first predetermined height position. The third and fourth magnetic heads have different azimuth angles respectively. The azimuth angles of the third and fourth magnetic heads are different from the azimuth angles of the first and second magnetic heads. The digital video signal is in a frequency band wider than a frequency band of the analog video signal. The digital video signal is free from periodicity of its record waveform. |
