KR20080053623A - Method for controlling record speed in optical disc device - Google Patents

Abstract

A method for controlling record speed in an optical disk device is provided to check a focus error signal and a tracking error signal and to detect deviation areas of focus and tracking errors in order to calculate the slope with respect to the deviation areas and slow the recording speed down. A method for controlling record speed in an optical disk device comprises the steps of: carrying out high speed recording and detecting deviation areas of focus and tracking errors(S10,S11); when the set threshold is exceeded for more than predetermined hours, detecting the deviation areas from the time of excess(S12,S13); determining a down speed corresponding to the slope and changing the record speed(S14); and calculating slopes of the deviation areas and slowing the recording speed down according to the slopes(S16).

Description

{Method for controlling record speed in optical disc device}

1 shows a configuration of a general optical disk device,

2 illustrates a graph of an embodiment in which the focus and tracking error signals are deviated;

FIG. 3 illustrates a process of calculating a slope for a deviation range of a focus and tracking error according to the present invention.

4 is a flowchart showing the operation of the recording speed adjusting method in the optical disk apparatus according to the present invention.

※ Explanation of code for main part of drawing

10: optical disc 11: optical pickup

12: spindle motor 13: sled motor

14 motor drive unit 15 playback and recording unit

16: codec 17: microcomputer

18: memory

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for adjusting recording speed in an optical disk device, and for example, in various types of optical disk devices such as a CD recorder or a DVD recorder, when performing a high speed recording operation, the degree of deviation of focus and tracking errors is achieved. The present invention relates to a method of adjusting the recording speed in an optical disk device to suitably control down the recording speed in multiple stages.

FIG. 1 shows a configuration of a general optical disc apparatus. For example, an optical disc apparatus such as a CD (CD) recorder or a DVD (DVD) recorder includes an optical disc 10, an optical pickup 11, and a spindle motor. 12), the sled motor 13, the motor driver 14, the playback and recording unit 15, the codec 16, the microcomputer 17, the memory 18, and the like.

On the other hand, when the microcomputer 17 performs a high speed recording operation at the request of the user, the microcomputer 17 operates the motor driving unit 14 to rotate the spindle motor 12 at a high speed and the reproduction. And operation control of the recording unit 15 and the codec 16 to record data on the optical disc 10 at high speed.

In addition, the microcomputer 17 monitors the focus error signal and the tracking error signal output from the optical pickup 11. For example, as shown in FIG. 2, the focus error signal and the tracking error signal are monitored. Detect a deviation section of the focus and tracking error that occurs irregularly.

If the deviation section continues to be detected for more than a predetermined time, the current high speed recording operation is switched to a preset low speed (eg, 1x) recording operation, and thus the data recording operation is performed due to deviation of focus and tracking error. This will prevent a fatal error from occurring.

However, in the general optical disk device as described above, the current high speed recording operation is unconditionally switched to a predetermined low speed recording operation irrespective of the degree of deviation of the focus and tracking error, so that the recording speed is lowered to a lower speed than necessary. There is a problem in that the data recording efficiency is lowered.

Accordingly, the present invention was created to solve the above problems, and for example, in the various types of optical disc devices such as a CD recorder or a DVD recorder, while performing a recording operation at a high speed, the focus error (TE) signal and tracking are performed. Monitor the error (TE) signal to detect a deviation section of the focus and tracking error, calculate a slope for the deviation section of the detected focus and tracking error, and then follow the slope. SUMMARY OF THE INVENTION An object of the present invention is to provide a method of adjusting a recording speed in an optical disk device for enabling a variable downward adjustment of the recording speed.

According to an aspect of the present invention, there is provided a recording speed adjusting method of an optical disk apparatus, the method including: detecting a deviation section of a focus and tracking error while performing a high speed recording operation; And calculating a slope for the deviation range of the detected focus and tracking error, and then variably down-regulating the recording speed according to the slope.

Also, in the first step, when the deviation of the focus and tracking error continues to exceed the preset reference value for a predetermined time or more while performing the high speed recording operation, the deviation of the focus and tracking error is detected from that point in time. In the second step, after calculating a slope for the deviation range of the detected focus and tracking error, a downward speed in proportion to the slope is determined, and the recording speed is variably adjusted.

Best Mode for Carrying Out the Invention Hereinafter, a preferred embodiment of a recording speed adjusting method in an optical disk apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

First, the recording speed adjusting method according to the present invention can be applied to a CD recorder or DVD recorder or the like configured as described above with reference to FIG. 1. For example, in the microcomputer 17 of the optical disk apparatus to which the present invention is applied, In addition, the focus error signal and the tracking error signal output from the optical pickup 11 are monitored.

As described above with reference to FIG. 2, the detection unit detects a deviation section of the focus and tracking error in which the focus error signal and the tracking error signal oscillate irregularly, and the deviation section continues for a predetermined time or more. If detected, the current high speed recording operation is adjusted downward to a low speed, but after calculating a slope for a deviation range of the focus and tracking error, a downward speed proportional to the slope is determined and the recording speed is increased. Variable adjustment is appropriate.

For example, FIG. 3 is a diagram illustrating a process of calculating a slope of a deviation range of a focus and tracking error according to the present invention. In the microcomputer 17, a deviation of a focus and tracking error (FE / TE) is calculated. When a predetermined time elapses with the degree of deviation exceeding the reference value Ref set before casting, the deviation degree of the focus and tracking error changed between the predetermined time (e.g. t1 to t2) (e.g., d1). The slope (eg, Slope A) for ˜d2) is calculated.

In addition, the recording speed is adjusted in multiple stages to suit the tilt. For example, as shown in FIG. 4, in the microcomputer 17 of the optical disk apparatus to which the present invention is applied, at a user's request, In the case of performing a recording operation (S10), by operating the motor drive unit 14, the spindle motor 12 is rotated at high speed, and the reproduction and recording unit 15 and the codec 16 are controlled by operation. Thus, data is recorded on the optical disc 10 at high speed.

In addition, the microcomputer 17 detects a deviation section of the focus and tracking error in which the focus error signal and the tracking error signal output from the optical pickup 11 are irregularly oscillated (S11). When the deviation of the focus and tracking error exceeds the preset reference value (S12), and the predetermined timeout state is maintained (S13), the focus and tracking error of the change between the predetermined time (for example, t1 to t2) The slope (e.g., Slope A = (d2-d1) / (t2-t1)) with respect to the deviation amount (e.g., d1 to d2) is calculated (S14).

The microcomputer 17 determines a downward speed suitable for the calculated slope in a state in which the recording operation is paused (S15). The value is stored and managed in non-volatile memory (eg EEPROM) in the device.

On the other hand, in the microcomputer 17, the current high speed recording operation is adjusted downward to a low speed as much as the downward speed determined through the above process (S16), and then the recording operation is performed at any low speed adjusted downward. Since the recording is resumed (S17), it is possible to adjust the recording speed down in multiple stages to suit the deviation of the focus and tracking errors.

Or more, preferred embodiments of the present invention described above, for the purpose of illustration, those skilled in the art, within the technical spirit and the technical scope of the present invention disclosed in the appended claims below, to further improve various other embodiments Changes, substitutions or additions will be possible.

The recording speed control method in the optical disk device according to the present invention made as described above, for example, in the various types of optical disk device, such as a CD recorder or DVD recorder, while performing the recording operation at a high speed, the focus error (TE) signal and By monitoring a tracking error (TE) signal, detecting a deviation section of the focus and tracking error, calculating a slope for the detected deviation range of the focus and tracking error, and then calculating the slope. Accordingly, the variable recording speed can be adjusted downward so that the recording speed can be adjusted down in multiple stages to suit the deviation of the focus and tracking errors. It is a very useful invention that can be prevented from being adjusted down to double speed.

Claims (4)

Detecting a deviation section of the focus and tracking error while performing a high speed recording operation; And And calculating a slope for the deviation range of the detected focus and tracking error, and then variably downgrading the recording speed according to the slope. The method of claim 1, In the first step, when the deviation of the focus and tracking error continues to exceed the preset reference value for a predetermined time or more while performing the high speed recording operation, the deviation of the focus and tracking error is detected from the time point. Recording speed control method in an optical disk device. The method of claim 1, In the second step, after calculating the slope for the deviation of the detected focus and tracking error, the recording speed in the optical disk device, characterized in that to determine the downward speed in proportion to the slope, and to variably adjust the recording speed How to adjust. The method of claim 1, The downward double speed proportional to the inclination is a value of a test result previously performed and is stored and managed in a nonvolatile memory in the device.

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