CN101169941A - Optical disk device recording power regulation method - Google Patents

Abstract

The invention relates to a record power adjustment method of an optical disk device capable of collating the record power and compensating the changed record power to an optimal value in a standby state period produced by buffer underload while the optical disk records data. The method for recording data on the optical disk through the optimal record power comprises following stages: the first stage, reading the recorded signal in the buffer underload period during data recording process; the second stage, detecting the current record power according to the read signal; and the third stage, compensating the record power according to the set record power as the target power. The invention can acquire the newest change stage at any moment when the peripheral condition, even if the recording power, changes, and can execute optimal record power compensation timely, thereby greatly improving the record quality of optical disk data.

Description

Optical disk device recording power regulation method

Technical field

The present invention relates to the recording power regulation method of optical disc apparatus, refer in particular to when appearing at Buffer Under Run when the video disc recording data in optical disc apparatus, inspection record power is compensated for as a kind of optical disk device recording power regulation method of best power.

Background technology

Having appeared at recently can non-volatile recording storage high image quality voice data and the high-density optic recording medium of video data, promptly with the similar CD of DVD-R that can write down and play, this with can develop in the use to the similar optical disc apparatus of DVD register of DVD-R record and playing video data and voice data.

This same as shown in Figure 1 with the similar CD of DVD-R, be divided into before the Lead-In Area PCA zone that is used to move best power control (OPC) operation (Power Calibration Area: the power control zone territory) and RMA (Recording Management Area: the record management zone) zone, when in the PCA zone, being divided into the OPC operation test zone of detection laser recording power be used to write down the zoning that testing time writes down number of times.

Can move OPC 100 times thereby test zone in the PCA zone and zoning are divided into 100, test can be carried out 100 times, if surpass 100 times, even exist record space can not carry out other record.

A division of test zone fan-shapedly constitutes by 15, uses a division during once test record, promptly use 15 fan-shaped, for this reason, read atip information (Absolute TimeInPregroove in the optical disc apparatus to video disc recording; The pre-groove absolute time information), be according to recording power being divided into 15 stages, to the test zone record EFM (modulation of Eight to FourteenModulation:8-14 position) in PCA zone signal to make the calibration power of advising in the industry at CD.

Next, play the signal of above-mentioned record, when the peak value of finishing play signal and low value equilibrium, be judged as suitable recording power, by the data of recording power numerical value to program area record reality.

That is, same as shown in Figure 2, behind test zone record EFM signal, when signal is play by each recording power detection Hi-Fi (high fidelity: high-fidelity) the peak-to-peak value numerical value of signal, when β numerical value (promptly $\mathrm{\&beta;}=\frac{\left|A1\right|-\left|\mathrm{<figure-callout\; id="2"\; label="A"\; filenames="A20061011770600081.png"\; state="\{\{state\}\}">A</figure-callout>}2\right|}{\left|A1\right|+\left|\mathrm{<figure-callout\; id="2"\; label="A"\; filenames="A20061011770600081.png"\; state="\{\{state\}\}">A</figure-callout>}2\right|}$ ) approach zero, with the optimal recording power of the power setting of symmetry.

On the other hand, during the DVD-RW that can write down repeatedly, when asymmetric property is bad,, use very difficulty of high power, so use index of modulation method as the optimal recording power detection method for guaranteeing recording characteristic repeatedly.

Same as shown in Figure 3, in the index of modulation method, after writing down the EFM signal in the test zone, detect the RF signal peak level and the horizontal light quantity of low ebb that in test zone, reflect when playing, the light quantity that detects is tried to achieve index of modulation numerical value (m) according to calculation process, utilizes gamma curve decision optimal recording power shown in Figure 4.

Gamma curve is represented index of modulation variable quantity and recording power variable quantity (promptly by the normalized inclination of the index of modulation $\mathrm{\&gamma;}=\frac{\mathrm{dm}}{\mathrm{dp}}\frac{p}{m}$ ), among Fig. 4, optimal recording power is just to determine when CD is made with the corresponding recording power of the determined γ t of gamma curve numerical value, with the multiplication factor that the is recorded in TAIP decision of multiplying each other.

On the other hand, in optical disc apparatus, optimal recording power by testing setup before the CD program area, when record digital program data or video/audio data, because optical disk high-speed rotation or start the factors such as temperature rising that take place because of light picker, recording power changes gradually from optimal recording power numerical value, in data recording process because be not equipped with the algorithm of detection record power, so continue record data by this change records power data, data of optical disk record quality can descend.

Summary of the invention

The present invention proposes for addressing the above problem just, optical disk device recording power regulation method purpose of the present invention is, when because of Buffer Under Run waiting status taking place when the video disc recording data, the check and correction recording power is compensated for as optimal values with the recording power that changes.

Another purpose of optical disk device recording power regulation method of the present invention is, appears at when data of optical disk writes down in the Buffer Under Run state, the signal of record before playing, and based on the index of modulation numerical value that from play signal, detects, the recording power of compensation variation.

To achieve these goals, optical disk device recording power regulation method of the present invention is for passing through the optimal recording power method for recording data to CD, be divided into as the next stage: the phase one: in during in the video disc recording data procedures, appearing at Buffer Under Run, read the signal that has write down; Subordinate phase: with the above-mentioned signal that reads serves as according to the power that detects present record; Phase III: with the T power of setting present recording power serves as according to increasing and decreasing compensation.

Effect of the present invention:

Identical with the above, according to optical disk device recording power regulation method of the present invention, in the Buffer Under Run time of in optical disc apparatus, in the process of video disc recording data, taking place, play the signal that has write down, detect the demodulation factor numerical value of play signal, thus the demodulation factor numerical value that detects is compared with the standard demodulation coefficient, target power for relevant decision with the standard demodulation coefficient, the state that the present recording power of GPRS changes, can carry out the operation of increase and decrease recording power and target power gap, thus, because of even the ambient conditions recording power changes, also can grasp its up-to-date variable condition at any time, and can carry out the compensation deals of optimal recording power timely, and then improve the quality of data of optical disk record widely.

For further specifying above-mentioned purpose of the present invention, design feature and effect, the present invention is described in detail below with reference to accompanying drawing.

Description of drawings

Fig. 1 is the PCA zone and the RMA area schematic of distributing in the common CD-R;

Fig. 2 is that the normal optical disk asymmetric property is a β characteristic synoptic diagram;

Fig. 3 is a normal optical disk index of modulation characteristic synoptic diagram;

Fig. 4 utilizes index of modulation rate of change shown in Figure 3 and recording power rate of change gamma curve synoptic diagram;

Fig. 5 is that the optical disc apparatus that recording power regulation method of the present invention is suitable for constitutes synoptic diagram;

When Fig. 6 is the Buffer Under Run that occurs according to the present invention when the multi-medium data video disc recording, the constitutional diagram of record data modulation numerical value before detecting;

Fig. 7 is that the modulation numerical value with detection same as shown in Figure 6 is basis, the constitutional diagram of increase and decrease compensation recording power;

Fig. 8 is according to optical disk device recording power regulation method operation chart of the present invention.

The symbol description of major part in the accompanying drawing:

10: CD 20: light picker

30a: data acknowledgment signal treating apparatus 30b: digital broadcast signal processing apparatus

40: channels bits scrambler 41: CD-ROM driver

50:RF signal processing apparatus 60: servomechanism installation

61: servo drive 70: level detection device

80: little process computer 81: storer

Embodiment

Embodiment to optical disk device recording power regulation method of the present invention is elaborated below with reference to accompanying drawings.

That is, Fig. 5 constitutes synoptic diagram according to the optical disc apparatus that recording power regulation method of the present invention is suitable for.

Same as shown in Figure 5, comprise according to optical disc apparatus of the present invention its formation: record data or from the reflected light of laser beam, read the light picker 20 of the signal of CD 10 records; To the numerical data additive error correction code (ECC) of input, and be converted to digital recording signal processing apparatus (DSP record) 30a of recorded data form; The binary signal of playing from CD 10 restores digital broadcast signal processing apparatus (DSP broadcast) 30b for original video/audio data and output; But the above-mentioned data that are converted to record format are converted to once more channels bits (CB) scrambler 40 of bit data stream; To export the CD-ROM driver 41 of light picker 20 according to the light quantity drive signal of bit data stream signal to; The signal that reads from light picker 20 in the CD 10 carries out the repercussions shaping, is output as the RF signal processing apparatus (R/F) 50 of binary signal; According to focus error signal and tracking error signal from light picker 20, the servomechanism installation 60 that the focusing/tracking servo of control light picker 20 and CD 10 rotations drive; According to the servo operation of servomechanism installation 60, the servo drive 61 of Control Shaft motor 62 rotations; The level detection device 70 of detection signal demodulation factor numerical value in the binary signal from RF signal processing apparatus 50; When Buffer Under Run occurring in recording disk 10 data modes, playing the data of video disc recording in light picker 20, is basis with the demodulation factor numerical value that detects in level detection device 70, little process computer 80 that the increase and decrease recording power is compensated; Store each CD and make the β numerical value and the target power (T power) of the target power (T) of society, the storer 81 of standard demodulation coefficient and T magnitude of power is for example with the similar non-volatility memorizer of EEPROM.

Same as shown in Figure 6, in CD 10 during record data, the data speed of accumulation and in fact different in impact damper 42 to the speed of video disc recording data, so during each record of data Buffer Under Run takes place, generate certain hour (promptly, during the HQ pattern two seconds is 12 seconds during the EQ pattern) waiting time.Operation is play in the waiting time that produces because of Buffer Under Run, and the signal of record before playing in corresponding CD detects demodulation factor numerical value from the play signal that reads in level detection device 70.

Same as shown in Figure 7, if from above-mentioned level detection device 70, detect demodulation factor, the standard demodulation coefficient numerical value that is stored in the storer 81 is compared with the demodulation factor numerical value of above-mentioned detection, increase or reduce corresponding recording power, present recording power and target power (T power) numerical value is close, carries out power back-off.

On the other hand, the recording power of Fig. 7-separating is changed the line map and can be obtained through the curve device from the each point that detects by test zone OPC.That is,, revise its corresponding recording power numerical value among the figure of curve device if try to achieve about the demodulation factor numerical value of measuring the outer numerical value of each point.

Next, referring to Fig. 8, Fig. 8 is the operation chart of optical disk device recording power regulation method of the present invention

Below, the flow diagram of the invention process example shown in Figure 8 and the operation of Fig. 5 device are described in detail in the lump.

Step 10, step 11, at first, if lay the CD 10 of recorded data, by the PCA area operation OPC operation of corresponding CD, as the result of OPC operation, the decision optimal recording power is recorded to the user area.

Step 12, in this state, be converted to recordable data layout according to digital recording signal processing apparatus input data, be converted to bit data stream again by channels bits scrambler 40, the driving by CD-ROM driver 41 in light picker 20 by the program area record data of optimal recording power to CD 10.

Step 13 on the other hand, in little process computer 80, under the state of CD 10 record data, judges that whether Buffer Under Run takes place.

Step 14, step 15, if be judged as the generation Buffer Under Run, the operation play command reads the signal that writes down before the CD 10, the demodulation factor of detection record signal in level detection device 70 in light picker 20.

Step 16, the standard demodulation coefficient numerical value of having stored in tracer signal demodulation factor that above-mentioned little process computer 80 comparison level pick-up units 70 detect and the storer, same as shown in Figure 7, judge whether the existing record power relevant with above-mentioned detection demodulation factor is lower than the target power relevant with the standard demodulation coefficient.

Step 17, above-mentioned judged result, lower than target power if the existing record magnitude of power is judged by the comparison of demodulation factor, recording power increases compensation deals now, with near target power.

Step 18 is if but judge that by the demodulation factor comparison present recording power numeric ratio target power numerical value increases, and reduces compensation deals with respective record power, with the degree approaching with target power.

Next step 19, judges whether to continue record data.If according to Buffer Under Run, welcoming once more through the required stand-by period can the record data time, carry out once more from step 12, position from record interruption before, come record data by the recording power that increases or reduce compensation, when Buffer Under Run takes place, check present recording power, and continue to compensate processing into optimal recording power.

Step 20 on the other hand, in little process computer 80, as the data recording deadline arrival of CD 10, is finished the respective data record operation.

Those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the present invention, and be not to be used as limitation of the invention, as long as in connotation scope of the present invention, all will drop in the scope of claims of the present invention variation, the modification of the above embodiment.

Claims (4)

1. optical disk device recording power regulation method, be for to CD by the optimal recording power method for recording data, it is characterized in that being divided into as the next stage:

Phase one: in during in the video disc recording data procedures, appearing at Buffer Under Run, read the signal that has write down;

Subordinate phase: with the above-mentioned signal that reads serves as according to the power that detects present record;

Phase III: with the target power of setting present recording power serves as according to increasing and decreasing compensation.

2. optical disk device recording power regulation method as claimed in claim 1 is characterized in that:

The above-mentioned phase one is to the phase III, is to carry out during Buffer Under Run in the record data process.

3. optical disk device recording power regulation method as claimed in claim 1 is characterized in that above-mentioned subordinate phase comprises:

The 1st step: detect the demodulation factor numerical value that reads signal;

The 2nd step: search and detect the relevant present calibration power numerical value of demodulation factor numerical value.

4. as claim 1 or 3 described optical disk device recording power regulation methods, it is characterized in that:

The above-mentioned phase III compares the demodulation factor numerical value that detects with the standard demodulation numerical value of having set, the recording power that the increase and decrease compensation is present makes the target power relevant with the standard demodulation coefficient approaching.

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