Compensating method for writing power of optic disc device

Abstract

A method for compensating writing-in power of a disk includes: testing the lowest write-in power and character of related write-signal, using the lowest write-in power to write in, testing the character of the signal of the written-in data to be compared with the signal character of the lowest write-in power to compensate the write-in power based on the result. This invention compensates write-in power timely based on the beta value tested in the played RF signal of the former written-in data and the lowest beta value tested and stored by OPC operation when the write-in pauses for a while because of the background operation of the buffer.

Description

technical field [0001] The present invention relates to a technique for compensating writing power of an optical disc device, and particularly relates to a method for appropriately compensating writing power according to the characteristics of a previous writing signal in a state where a writing operation is temporarily suspended. Background technique [0002] In a general optical disc device, the minimum writing power is detected through OPC (Optimum Power Calibration, OPC for short) operation, and the writing is performed using the minimum writing power. The following is a brief description of how to perform OPC operations on recording discs (such as DVD-R). [0003] First, write the test data of a specified size in the data area of ​​the optical disc. Taking this as an example, for a recordable disc (DVD-R), write the test data in the 1ECC module (16Sector) every time an OPC operation is performed. At this time, as shown in FIG. 1, the write power corresponding to the ta...

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Problems solved by technology

However, the test results show that the effect of the above ROPC operation on improving the writing quality is negligible

[0008] Moreover, as the temperature changes, additional accessories such as thermal resistors and ADCs must be installed to compensate for the writing power. In this way, there are problems of increased cost and volume of the device.

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