| 摘要 |
<p>Apparatus for reproducing digital signals recorded on a recording tape (14) comprises a rotary drum about which the tape (14) can be trained, a rotary head (11 A, 11 B) mounted in the drum, a transport mechanism (34) for transporting the tape (14) over the drum and rotating the head (11 A, 11 B) so that a relative speed is established between the head (11 A, 11 B) and the tape (14) and the head (11A, 11 B) scans the tape (14) and generates reproduced digital signals in response to digital signals recorded on the tape (14), and a mode-control mechanism for controlling the transport mechanism (34) so that the tape (14) is transported over the drum at an absolute tape speed that can be varied. A servomechanism (32,40) responsive to variations in the absolute tape speed adjusts the transport mechanism (34) so that the head (11 A, 11 B) acquires a rotary speed such that the relative speed is restored to and maintained at a substantially constant value, not withstanding changes in the absolute tape speed effected under the control of the mode-control mechanism .</p> |
