| 摘要 |
PURPOSE:To prevent retrieval mistake, by dividing a tape mark signal into minute signals, recording a tape mark number representing a tape mark discriminating signal and the minutely divided number and stopping a reproducing operation at the point of time of discrimination of a designated tape mark number. CONSTITUTION:A TM number TMh is recorded by dividing a unit TM behind a header (h) of the tape mark TM. At high-speed retrieval, the period (h) only is recognized and the header (h) of the specified TM is detected, then a normal constant-speed reproducing mode is obtained and the TMh is discriminated. The number of the TMh when the mode is transferred to the constant-speed reproducing mode is denoted as (n), the reproducing mode is kept continuously without being stopped at the point of time, the TMh is counted at the steady state speed and the mode is stopped at a prescribed number N. Thus, the point of time in detecting the TM and stopping at the high-speed reproduction is always at the end of the TMh, that is, the location of the TMh=N. |
