Patent ID: 7170838
Filing Date: 2007-01-30
Classification: G11B

Abstract:
1. An information recording and reproducing apparatus capable of recording information to, reproducing from an information recording medium or erasing information on the information recording medium, by irradiating the information recording medium with an oscillating laser beam and forming on a data area of the information recording medium, a recording region physically different to a portion to which information has not been recorded, the apparatus comprising: means for detecting amplitude information of a reproduced signal, the reproduced signal being based at least in part on recorded user information generated from a write operation, and means for detecting performance information or information on error information obtained from a binarized signal of the reproduced signal, wherein the apparatus: wherein the changes to recording conditions include changing recording power based on the amplitude information of the reproduced signal and/or changing a recording pulse width based on the error information or performance information obtained from the binarized signal of the reproduced signal.