| 摘要 |
A recording and reproducing device (1) has a recording apparatus (4) which includes at least two magnetic heads (A, B), mounted on a rotatably supported head disc (14) and having Z different azimuth angles, for the recording of recording data (AD) in helical recording tracks (S) on a magnetic tape (12), a part of the recording data (AD) being recordable as information data (ID) in an information data recording area (SC) of each helical recording track (S), this recording area being always the same as regards its position in a helical recording track (S), and has a reproducing apparatus (5) for reproducing, at a maximum N-fold reproducing speed, information data (ID) recorded on a magnetic tape (12), each of the at least two magnetic heads (A, B) being capable of scanning a helical reproducing track (W) which traverses N helical recording tracks (S). The recording and reproducing device now further has a partitioning circuit (35) for partitioning additional data (ZU) into K=(N*Z)-1 partitions of information data (ID) which can each be recorded in an information data recording area (SC), the recording apparatus (4) recording at least K times the K partitions of information data (ID), which can each be recorded in an information data recording area (SC) of a helical recording track (S), in total in at least K*K information data recording areas (SC) of at least K*K helical recording tracks (S).
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