A readout controlling apparatus for controlling reading conditions at the time of reading data coded in units of predetermined code blocks from a recording medium capable of performing error correction at a high reliability even when the playback conditions are poor by calculating an error rate using...http://www.google.com/patents/US7281175?utm_source=gb-gplus-sharePatent US7281175 - Readout controlling apparatus, reproducing apparatus, recording apparatus, and readout controlling method