Optical disk, optical disk reading equipment, reproducing method, recording method and device

在光盘(10)的内周区域的读入区域(27)内，交替地形成作为评价光盘(10)的读入误码率的测试图案的凹坑长3T、脊长*6T、凹坑长7T、脊长3T、凹坑长6T、脊长7T的凹坑和脊。通过由再生系统再生该测试图案数据，检测误码率，求出用于使该误码率为最小的修正系数，利用该修正系数修正再生信号，所以，再生信号可以在误码率为最小的状态下由再生系统进行再生。 A test pattern area is provided outside the data area of an optical disk and recorded with a test pattern including a shortest pit row having repreated combinations of shortest pits and shortest non-pits, a longest pit row having repeated combinations of longest pits and longest non-pits, and a predetermined pit row having repeated combinations of pits with a predetermined pit length between said shortest pit length (mT) and said longest pit length (nT) and non pits corresponding to said pits. This test pattern data is reproduced by a reproducing system to detect an error rate, a compensation coefficient for minimizing the error rate is acquired, and a reproduction signal is compensated by using this compensation coefficient so that the reproduction signal is reproduced with the minimized error rate by the reproducing system.