| 摘要 |
An information recording apparatus comprises: a device to record information into a recording medium such as an optical card; a generator to generate a pattern signal for synchronization of the recording information, this generator being able to generate an arbitrary pattern; a controller for adding the pattern signal to the recording information and for recording the information and the pattern signal into the recording medium; and a host computer for transmitting and receiving the recording information to and from the information recording apparatus. The pattern signal is added in front of the recording information and another pattern signal is added after the recording information. This another pattern signal is derived by reversely rearranging the pattern signal added in front of the recording information. A discriminating signal is interposed between the recording information and the pattern signal. The host computer can arbitrarily set a pattern of the pattern signal. With this apparatus, the security of the recorded information is held.
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