| 摘要 |
There is provided a digital recording and reproducing apparatus which is capable of determining whether or not recording data was rewritten, reliably and in a short time period without increasing manufacturing costs thereof. A digital recording and reproducing apparatus is configured to be capable of having a removable external memory mounted therein, for recording recording data in the external memory and reproducing a sound based on the recording data recorded in the external memory. An identification data-generating block generates identification data for use in determining whether or not the recording data was rewritten. An internal memory can record the identification data. A control block records the identification data in the external memory as part of the recording data and at the same time records the identification data in the internal memory such that the identification data is recorded in FAT data concerning the recording data in a manner correlated to a title of a file to be recorded therein. When the control block reads in the recording data from the external memory, if the identification data corresponding to the title of the file in the FAT data concerning the recording data read in from the external memory exists in the internal memory, the control block compares the existing identification data and the identification data recorded in the recording data read in with each other, and carries out predetermined processing if the compared identification data are different from each other.
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