Determination method of optimal writing power

Abstract

The present invention is one determination method of optimal RW power in record medium, such as RW CD. To the RW CD, the RW power in the inner circle and that in some data RW areas are determined to obtain the optimal RW power, which is then used in RW of the data area. Several optimal RW power values are obtained and one relationship curve of optimal RW power vs RW position is established by means of interpolation method, so that different RW power in different positions may be selected.

Description

technical field [0001] The invention relates to a method for measuring the best recording power, and in particular to a method for measuring the best recording power of a rewritable optical disc, which can find out the optimal recording power for any position of the optical disc. Background technique [0002] The so-called rewritable disc (rewritable disk such as CD-RW) means that the disc can be repeatedly written with different data, which is different from the recordable disc (recordable disk such as CD-R) that can only be recorded once. ). Regardless of whether it is a rewritable disc or a recordable disc, the so-called Optimal Power Calibration (OPC) must be done before the optical drive officially records data, so as to know the optimal power to be used. Optimum recording power. Commonly, the measurement of the optimum recording power of an optical disc is performed in a Power Calibration Area (PCA for short) located in the inner circle of the optical disc. The flow...

AI Technical Summary

Problems solved by technology

In the case of a fixed angular velocity, the recording speed of the outer ring of a general optical disc can reach about 2.5 times that of the inner ring. Do not know the best recording power to burn, it is easy to cause failure

Therefore, the current recording method is performed at a fixed linear velocity. Compared with the method of fixed angular velocity, the recording method of fixed linear velocity takes more time

In addition, even if the recording method with a fixed linear speed is adopted, the optimal recording power may have different requirements due to the different materials of the inner and outer rings of the disc. If the recording power cannot reflect the different materials, it will easily lead to recording failure.

However, the common method of determining the best recording power only measures the best recording power suitable for the inner ring of the disc.

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