| 摘要 |
It is already known in principle that video cassettes may be provided a fixed memory unit, with which a read/write-unit in a recorder can communicate in such a manner that the programme contents of the cassette can be read into and out from the memory unit. This technique provides for many advantageous possibilities, but so far it has only been proposed for use with specialized equipment, as in ordinary commercial equipment there is hardly surplus room for the required components. According to the invention, however, a vacant standard room is used for the mounting of the memory unit (8), viz. in the recordlock hole (6) in a standard cassette, and connector terminals (12) are used, which are mounted on the sensor head (14) applied in standard recorders for detecting whether the recordlock hole is open or closed. The sensor head, then, cannot detect an open hole, but instead the desired associated recordlock option may be programmed in the memory unit. With the invention, therefore, both new and old standard cassettes can be adapted for utilizing the said attractive technique in connection with only slightly modified standard recorders. |
