Patent ID: 7515978

Claim:
A digital-audio-signal recording apparatus, comprising: a storage section storing digital audio data; a write section that writes data on a disk-shaped storage medium; a control section that, when a write operation is to be performed by said write section for writing the digital audio data, stored on said storage section, to the disk-shaped storage medium, evaluates the status of an erasure state flag and if the erasure state flag is not indicative of an erased state, sets the erasure state flag within file management information to the erased state without erasing the file management information on said storage section, such that the digital audio data stored on said storage section cannot be retrieved by any processing operation other than said write operation, then causes said write section to write the digital audio data to the disk-shaped storage medium, and after completion of the writing of the digital audio data to the disk-shaped storage medium, the control section sets file validity information for the digital audio data stored in the storage section to non-valid to disable further readout of the digital audio data stored in said storage section and then erases the digital audio data from said storage section.