Error correction device and recording and reproducing device
View Patent ↗An error correction device is a device detecting and correcting an error of uncorrected data. The error correction device includes a temporary storage buffer (data buffer) having a storage area divided into a plurality of units and storing the uncorrected data divided into storage area units, and an error correction part (error correction circuit) repeatedly performing detecting an error of the uncorrected data stored in the temporary storage buffer, correcting the detected error, and writing the corrected error into the temporary storage buffer for each storage area unit. The error correction part corrects the error of the uncorrected data for storage area unit of the temporary storage buffer to successively write the corrected data into the temporary storage buffer.
1. An error correction device comprising:
a temporary storage buffer having a storage area divided into a plurality of units and storing uncorrected data divided into storage area units; and
an error correction part detecting an error of the uncorrected data stored in the temporary storage buffer, correcting the detected error and writing the corrected data into the temporary storage buffer for each storage area unit, and repeating the detecting, the correcting and the writing, wherein
the temporary storage buffer includes the storage area divided into a plurality of pages accessed by page unit, the storage area being divided into the plurality of page units; and
the error detection part comprises a detection part, and rewriting of data stored in the temporary storage buffer is started upon the detection part detecting the timing in which a position on the temporary storage buffer storing the uncorrected data has crossed a page boundary.
2. The error correction device according to claim 1 ,
wherein the error correction part includes:
a correction address buffer storing error position information identifying the uncorrected data whose error is detected, wherein the detection part detects timing in which an error of the uncorrected data stored in one storage area unit is detected; and
a correction data buffer storing an error correction code correcting the error of the uncorrected data identified by the error position information and overwriting the corrected data corrected based on the error correction code and the error position information in an area where the error correction code is stored in a timing detected by the detection part, and
wherein the temporary storage buffer stores the corrected data overwritten in the correction data buffer.
3. The error correction device according to claim 2 , wherein
the correction data buffer includes a first area and a second area, the first area and the second area formed to be able to store two storage area units, the correction data buffer overwrites the corrected data in the first area and stores another error correction code of another uncorrected data in the second area when the timing is notified by the detection part, and
the temporary storage buffer stores the corrected data overwritten in the first area.
4. The error correction device according to claim 3 , wherein the temporary storage buffer stores the corrected data after the corrected data for the storage area unit is overwritten in the correction data buffer.
5. A recording and reproducing device comprising:
a reading part reading out uncorrected data from a recording media; and
an error correction device according to claim 1 .