KR100847451B1 - Method for recording data of optical-disc apparatus - Google Patents

Abstract

The present invention records data according to an optimal recording power. To this end, an embodiment of the present invention provides a method for recording data by measuring a final RF value when an error occurs during data recording and compensating recording power accordingly. Alternatively, it checks whether there is a recording stop signal while recording data on the optical disc, calculates the jitter value of the last track that recorded the data if there is a recording stop signal, and checks whether the calculated jitter value is within the reference jitter value range. If the value is out of the reference jitter range, the controller switches to the recording power calculation mode to detect the optimal recording power, and writes data to the optical disk according to the detected optimal recording power, thereby reducing the jitter value at the recording error. As a result, the recording power can be compensated to record data according to the optimum recording power.

Optical disc devices, RF values, jitter values

Description

Data recording method of optical disk device {METHOD FOR RECORDING DATA OF OPTICAL-DISC APPARATUS}

1 is a block diagram of an optical disk device suitable for recording data by compensating recording power according to a jitter value measured according to a preferred embodiment of the present invention;

2 is a flowchart illustrating a process of recording data on an optical disc by compensating recording power according to the jitter value measured according to the preferred embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

102: key input block 104: control block

106: tuning and demodulation block 108: decoding block

110: MPEG codec block 112: optical disc loading block

114: storage block 116: signal processing block

The present invention relates to a method of recording data using an optical disc, and more particularly, to a data recording method of an optical disc apparatus suitable for recording data on an optical disc by compensating recording power in the optical disc apparatus.

As is well known, optical discs, such as Digital Versatile Disc (DVD), can be used for playback only, Digital Versatile Disc-Read Only Memory (DVD-ROM), Digital Versatile Disc-Recordable (DVD-R), rewritable It has various kinds such as DVD-RW (Digital Versatile Disc-ReWritable).

An optical disc apparatus for recording and reproducing using such an optical disc sets an optimum recording power for each optical disc in order to record data on the optical disc, and records the data on the mounted optical disc while maintaining the recording power.

On the other hand, conventionally, if a recording error occurs while recording data on the optical disc using the optical disc device, after recording of the optical disc is stopped, the final RF value recorded is measured to predict the asymmetry, and thus the recording power is estimated. In this method, the recording power is not compensated correctly, and in the case of RW (ReWritable) type optical discs, the use of the optical disc is avoided because of poor asymmetry characteristics. There is a problem in performing the recording.

Accordingly, the present invention is to solve the above problems of the prior art, an optical disk apparatus capable of performing optical disk recording by compensating optical disk recording power through jitter value measured at the time of recording power error of the optical disk in the optical disk apparatus. Its purpose is to provide a method for recording data.

In order to achieve the above object, the present invention provides a first step of checking whether there is a recording stop signal while recording data on an optical disc, and if there is the recording stop signal, calculating the jitter value of the last track on which the data has been recorded. A second step of checking whether the calculated jitter value is within a reference jitter value range, and if the check result is a value out of the reference jitter value range, switching to a recording power calculation mode to detect an optimum recording power And a fifth step of recording data on the optical disc in accordance with the detected optimal recording power.

The above and other objects and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention described below with reference to the accompanying drawings by those skilled in the art.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The technical gist of the present invention checks whether there is a recording stop signal while recording data on an optical disc, and if there is a recording stop signal, calculates the jitter value of the last track on which data is recorded, and the calculated jitter value is within the reference jitter value range. If the value is out of the reference jitter value range, it is switched to the recording power calculation mode to detect the optimal recording power, and the data is recorded on the optical disc according to the detected optimal recording power. Through this, it is possible to easily achieve the purpose of the present invention.

1 is a block diagram of an optical disk device suitable for recording data by compensating recording power according to a jitter value measured according to a preferred embodiment of the present invention. The key input block 102, the control block 104, tuning and Demodulation block 106, decoding block 108, MPEG codec block 110, optical disc loading block 112, storage block 114, menu generation block 116 and signal processing block 118.

Referring to FIG. 1, the key input block 102 generates an operation signal for controlling the operation of an optical disc recording apparatus, including, for example, a remote controller, and the like. When various keys (for example, a recording key, a playback key, etc.) are input through a controller or the like, the respective operation signals are generated in response to the input of the control keys 104 and the like.

Next, the control block 104 performs overall operation control of the optical disc recording apparatus, and provides a control signal for tuning and demodulating any one of a plurality of broadcast channels to the tuning and demodulation block 106, A control signal for decoding the demodulated broadcast stream is provided to the decoding block 108, and a control signal for decompressing the extracted broadcast data for compressing or recording or playing the decoded broadcast data in a manner such as MPEG. It provides a function such as provided to the MPEG codec block 110.

In addition, the control block 104 provides a control signal for storing broadcast data compressed by MPEG or the like or a control signal for extracting broadcast data to be reproduced to the optical disc loading block 112, and the transmitted broadcast signal. The video signal and the audio signal are respectively signal-processed to provide a control signal to the signal processing block 116 for reproduction through a monitor and a speaker (not shown).

On the other hand, the control block 104 checks whether there is a recording stop signal due to an optical disc recording error from the optical disc loading block 112 while recording data on the optical disc in accordance with the present invention, and if there is a recording stop signal, the jitter of the last track A control signal for measuring (calculating) a jitter value is provided to the optical disc loading block 112, and it is checked whether the measured jitter value is within a range of reference jitter values stored in the storage block 114, and the reference jitter value If the value is within the range, a control signal for recording data according to the existing recording power is provided to the optical disc loading block 112. If the value is out of the reference jitter value range, the control signal is switched to the recording power calculation mode, and then the recording power is changed. Test data is recorded following the track to provide a control signal to the optical disc loading block 112 for detecting the optimal recording power. .

In addition, in the control block 104, when the optimum recording power is detected through the recording power calculation mode, a control signal for writing data by overwriting the recorded test data following the last track according to the detected optimal recording power. To the optical disc loading block 112.

Next, the tuning and demodulation block 106 tunes any one of a plurality of broadcast channels received through an antenna (not shown) to demodulate and error correct broadcast signal packet data of a selected channel extracted from a transport stream. It passes to the decoding block 108 through the process of, and the like.

The decoding block 108 restores the compressed coded broadcast signal (broadcast program signal) of a specific channel to the original signal before encoding using a decoding technique such as variable length decoding, inverse DCT, inverse quantization, and motion compensation. The recovered broadcast signal is transmitted to the MPEG codec block 110. Here, the decoding block 108 extracts additional information (for example, broadcast program guide (EPG) information, etc.) of the broadcast signal and transmits it to the control block 104 to store such information.

Next, the MPEG codec block 110 compresses the broadcast signal transmitted from the decoding block 108 by MPEG or the like and transmits it to the optical disc loading block 112 during broadcast program recording (data recording), and reproduces the broadcast program. In the case of (data reproduction), the broadcast signal extracted from the optical disc loading block 112 is decompressed in a manner such as MPEG and transferred to the signal processing block 116.

Subsequently, the optical disc loading block 112 stores the broadcast signal transmitted from the MPEG codec block 110 or extracts the broadcast signal to be transmitted to the MPEG codec block 110 to determine the type of the mounted optical disc. Provide information (for example, wobble frequency, etc.) according to a predetermined scheme to the control block 104 and record data to be recorded using the corresponding optical disc according to a recording control signal provided from the control block 104. .

In addition, the optical disc loading block 112 transmits a recording stop signal to the control block 104 when an error occurs while recording data on the optical disc, and the jitter value of the final track in accordance with the control signal provided from the control block 104. And provide the control data to the control block 104 by detecting the optimal recording power by recording the test data following the last track while changing the recording power. Record it.

Meanwhile, the storage block 114 stores various execution programs of the optical disc recording apparatus. The storage block 114 stores additional information on the received broadcast signal or extracts the additional information as necessary to provide it to the control block 104. The reference jitter value range information according to the optical disc is stored and provided to the control block 104 as necessary.

In the signal processing block 116, the broadcast signal to be transmitted is processed to display a video signal through a monitor (not shown), and the audio signal is output through a speaker not shown.

Next, if there is a recording stop signal in the optical disk device having the above-described configuration, the jitter value of the last track is calculated and compared with the reference jitter value, and if it is out of the reference jitter value range, the test is switched to the recording power calculation mode. After detecting the optimum recording power using the data, a process of recording the data by overwriting the test data recorded according to the optimum recording power will be described.

2 is a flowchart illustrating a process of recording data on an optical disc by compensating for recording power according to the jitter value measured according to an exemplary embodiment of the present invention.

Referring to Fig. 2, during the mode of recording data on the optical disc in the optical disc apparatus (step 202), the control block 104 checks whether there is a recording stop signal from the optical disc loading block 112 due to an optical disc recording error ( Step 204).

As a result of the check in the step 204, when there is a recording stop signal, the control block 104 provides a control signal for measuring (calculating) the jitter value to the optical disc loading block 112, and thus the optical disc loading block ( In step 112, the jitter value for the last track of the optical disc on which data is recorded is calculated (step 206).

The control block 104 receives the calculated jitter value from the optical disc loading block 112 and compares it with the reference jitter value range information stored in the storage block 114, and the calculated jitter value is within the reference jitter value range. Check if it is a value (step 208).

As a result of the check in the step 208, if the calculated jitter value is a value within the reference jitter value range, the control block 104 provides a data recording control signal to the optical disc loading block 112 to provide an optical disc according to the existing recording power. When data recording is performed (step 202), and the calculated jitter value is out of the reference jitter value range, the control block 104 switches the recording power calculation mode and then changes the recording power to the final track of the optical disc. The control signal for recording is then provided to the optical disc loading block 112 (step 210).

The optical disc loading block 112 then switches to the recording power calculation mode in accordance with the control signal provided from the control block 104, and then changes the recording power to record the test data following the last track of the optical disc. Is detected (step 212).

Subsequently, the control block 104 provides a control signal for recording data on the optical disk according to the detected optimal recording power to the optical disk loading block 112, and accordingly, the optical disk loading block 112 according to the optimal recording power. Data is recorded in such a manner as to overwrite the recorded test data following the last track of the optical disc (step 214).

Therefore, when there is a recording stop signal during data recording in the optical disk device, the jitter value is calculated and, when the value is outside the reference jitter value range, the test data is recorded after the last track to detect the optimal recording power, and the test recorded after the last track. By overwriting the data, data can be recorded in accordance with the optimum recording power.

In the foregoing description, the present invention has been described with reference to preferred embodiments, but the present invention is not necessarily limited thereto. Those skilled in the art will appreciate that the present invention may be modified without departing from the spirit of the present invention. It will be readily appreciated that branch substitutions, modifications and variations are possible.

As described above, the present invention, unlike the conventional method of measuring the final RF value in the event of an error during data recording and compensating the recording power accordingly, recording the data, when there is a recording stop signal while recording data on the optical disc. After calculating the jitter value of the last track, if the value is outside the range of the reference jitter value, the optimum recording power is detected by the test data, and then the data is recorded in accordance with the optimum recording power by overwriting the data. In the event of an error, the recording power can be compensated for according to the jitter value and data can be recorded according to the optimum recording power.

Claims (4)

A first step of checking whether there is a recording stop signal while recording data on the optical disc; A second step of calculating a jitter value of the last track in which the data is recorded when the recording stop signal is present; A third step of checking whether the calculated jitter value is within a reference jitter value range; A fourth step of detecting an optimal recording power by switching to a recording power calculation mode if the value is out of the reference jitter value range as a result of the check; A fifth step of recording data on the optical disc in accordance with the detected optimal recording power Data recording method of the optical disk device comprising a. The method of claim 1, The data recording method, Performing the first step again if the result of the check in the third step is a value within the reference jitter value range; The data recording method of the optical disk device further comprising. The method of claim 1, And said fourth step is for recording said test data following said last track while changing recording power to detect said optimum recording power. The method of claim 1, And the data recording of the fifth step is overwriting the recorded test data to detect the optimum recording power.

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