公开(公告)号：US20110235487A1

公开(公告)日：2011-09-29

申请号：US12977975

申请日：2010-12-23

申请人： MASAAKI KUREBAYASHI ,  SHINJI FUJITA ,  OSAMU KAWAMAE

发明人： MASAAKI KUREBAYASHI ,  SHINJI FUJITA ,  OSAMU KAWAMAE

IPC分类号： G11B20/18

CPC分类号： G11B7/00458 ,  G11B7/268

摘要： There is provided a method of calculating the degradation over time of the quality of data recorded on an optical disk in a short time. In the method, when user data is recorded on a data area, a test signal including a component in which the signal level is smaller than a reference value, is recorded on a test area. Then, the test signal is reproduced from the test area when a predetermined time has passed, to calculate the quality degradation of the user data from the evaluation result. Alternatively, every time when the user data is recorded/reproduced on/from the data area, the test signal is recorded/reproduced repeatedly on/from the test area. Then, the test signal is reproduced from the test area at a predetermined timing, to calculate the quality degradation of the user data from the evaluation result.

摘要翻译： 提供了一种在短时间内计算在光盘上记录的数据的质量随着时间的劣化的方法。 在该方法中，当用户数据被记录在数据区域时，包括信号电平小于参考值的分量的测试信号被记录在测试区域上。 然后，当经过预定时间时，从测试区再现测试信号，从评估结果计算用户数据的质量下降。 或者，每当在数据区上记录/再现用户数据时，测试信号被重复地记录/再现在测试区域上。 然后，在预定定时从测试区域再现测试信号，从评估结果计算用户数据的质量劣化。