Optical disk device recording power regulation method

Abstract

The invention relates to a record power adjustment method of an optical disk device, capable of increasing or decreasing the record power in a state of buffer underload while recording data, recording test data, and compensating the record power to an optimal value according to the adjustment value of record power. The method comprises following stage: the first stage, increasing or decreasing the power value in comparison with the prior record power in the buffer underload period during data recording process, and recording test data; the second stage, reading the test data, and detecting the signal change magnitude; and the third stage, increasing or decreasing the power value based on the change amount of the detection signal so as to adjust the prior record power to a preset target power. The invention can acquire the power change condition caused by peripheral condition change timely, and can execute optimal record power compensation timely, thereby improving the record quality of optical disk data.

Description

technical field [0001] The invention relates to a method for adjusting recording power of an optical disc device, in particular to a method for adjusting recording power of an optical disc device that detects recording power when the buffer is underrun when recording data to the optical disc, and compensates for optimum power. Background technique [0002] Recently, a high-density optical recording medium that can record and store high-quality audio data and video data for a long time has appeared, that is, an optical disc similar to DVD-R that can be recorded and played. Optical disc devices similar to DVD recorders for data and audio data are being developed and used. [0003] This DVD-R-like disc is figure 1 As shown, the lead-in area was previously divided into a PCA area (power control area) and an RMA (Recording Management Area: Recording Management Area) area for running optimal power control (OPC) operations, and in the PCA area it is divided into OPC runtime A tes...

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Problems solved by technology

[0011] On the other hand, in the optical disc device, when recording digital program data or video / audio data with the optimum recording power set by testing before the program area of ​​the disc, the temperature rise due to the high-speed rotation of the disc or the activation of the optical pickup And other factors, the recording power gradually changes from the optimum recording power value. During the data recording process, there is no algorithm for detecting the recording power, so if the recording power data is continuously recorded through this change, the quality of the optical disc data recording will be reduced.

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