| 摘要 |
In conventional copying processes, signals recorded in addition to the actual useful information, e.g. control signals for the synchronisation of recording-head switchover impulses, are not copied. Additional information can, however, be encoded in a variation of these signals, and this information is thus also not copied. In the invention, digital information recorded on the control track and detected by a reproduction device is transmitted by a transmission stage to a recording device where it is recorded again in digitally encoded form in an appropriate time gate on the control track. The process and device are of use in the copying of magnetic tapes containing address or index marks. |
