Wenderoth, Lind & Ponack, L.L.P.
Information recording and reproducing apparatus for writing user data received from an external device to a recording medium using generated parity data corresponding to the user data
An information recording and reproducing apparatus writes user data received from an external device into a recording medium and reads the user data from the recording medium so as to transmit the user data to the external terminal. The information recording and reproducing apparatus includes an external interface unit operable to transmit and receive the user data to and from the external device, a first ECC generator operable to generate parity data corresponding to the user data, an access unit operable to control recording and reading of the user data or the parity data to and from the recording medium, a recording controller operable to record the user data and the first parity data to the recording medium via the access unit, an ECC correcting unit operable to correct an error of the user data read from the recording medium using the parity data read from a nonvolatile memory via the access unit, and a reproducing controller having a first reproducing mode for reading and reproducing the user data without reading the parity data from the recording medium at the time of reproducing data and a second reproducing mode for reading and reproducing at least the parity data from the recording medium, the reproducing controller operable to detect presence or non-presence of an error of the user data read from the recording medium during execution of the first reproducing mode and executing the second reproducing mode when the presence of an error is detected.
Panasonic Corporation
G G
G11C G06F
additional inventional
Takeshi
Otsuka