CN1237519C - Recording power controlling method of optical recording apparatus - Google Patents

Abstract

The present invention relates to a recording power controlling method for an optical recording apparatus. The method comprises the following stages: stage 1, confirming the recording starting time of an optical disk; stage 2, setting a recording method for the optical disk with the recording starting time; stage 3, testing the record of the recording power corresponding to an absolute time and setting an optimum recording power; stage 4, starting to record by the set optimum recording power from a proper time. The time information tested in the optical disk during recording is used for recording according to the recording power increased by a gradient set by the characteristics of the inner periphery and the outer periphery in advance on the optical disk, and therefore, the present invention can stabilize the recording effect of the inner periphery and the outer periphery.

Description

The recording power control method of optical recorder

Technical field

The relevant a kind of optical recorder of the present invention, the control method of the recording power of relevant a kind of optical recorder specifically.

Background technology

Along with popularizing of CD, CD has become popular a kind of magnetic disk medium, and along with the appearance of high capacity DVD, its expected value also raises further recently.In utilizing optical recording media, the most representative have CD compact disc-ROM (CD-Read Only Memory), a DVD ROM (read-only memory) (Digital VersatileDisk-Read only Memory) etc., exists a plurality of magnetic tracks that a plurality of sectors and every sector with radial division are slit into concentric circles form five equilibrium on such optical recording media.

Such optical recording media is rotated by electric rotating machine, reads with the concentric circles form to external diameter from the center of optical recording media by optical pickup device.

Recently, in order to play simple optical record medium, except that the CD compact disc-ROM drives, also have only the CD of disposable recording imprint CDs (CD-Recordable) drive, can write down the CD that reads CD one erasable (CD-Rewritable) driver repeatedly and all be commonly used.

Optical recorder driving laser diode, irradiation is than the macro-energy streamer, change the physical characteristics be present in the information recording layer on the above-mentioned CD, thus on CD recorded information, use the little of physical characteristics that can not change information recording layer to read information from CD by streamer simultaneously.

Such optical recorder in order to select the recording power that this CD is fit to, will be carried out best power control (OPC:Optimum Power Control) process when the CD-R recorded information.

For this reason, in CD-R, in order to determine recording power, test zone--power calibration area (PCA:Power Calibration Area) is set to the most not use zone of interior all positions.

Real data being recorded in the middle of the process of CD, adopt such optimal recording power control technology, the technology of the record light quantity that decision is best is moved optimal recording power control (ROPC:RunningOptimum Power Control) exactly.

Optical recorder in the past is behind the power calibration area record test data of CD, the proportional play signal of light quantity that detects and reflect (promptly, high-frequency signal), utilize the laterally zygomorphic variable of those play signal waveforms (β value), calculate vibration (jitter) amount and reach minimum β value, the recording power that β value therewith is directly proportional is chosen to be optimal recording power, and according to file build, the data that will write down are recorded on the CD.

In addition, as shown in Figure 1, the disk of optical recorder in the past, for periphery within it obtains uniform record effect, the relative curve map that drives (over drive) amplitude establishing method according to its absolute time track record pulse of actual disc of disk characteristics and moment, Fig. 2 are track record pulses and according to relevant curve map between on its formed match time shaft in existing optical recorder.

With reference to Fig. 1 and Fig. 2, CD A, B, C are along with the variation of absolute time, and the recording impulse width of cloth separately is inconsistent.

As CD C, relative absolute time, even finish record with certain recording impulse width of cloth, also can obtain uniform record effect in interior periphery, use existing optic recording method also not have much problems still this moment, resemble CD A or CD B, interior periphery at CD, the recording characteristic of CD is because of the reflectivity of CD, the characteristic of recording film mark, when differences such as the physical change of optical disc shapes change, has only variation according to absolute time, recording impulse amplitude or recording power are carried out increasing or decreasing, come executive logging in interior periphery with identical recording impulse amplitude or recording power if can obtain the inside and outside Zhou Jilu effect of uniform CD, then exist and read the shortcoming that ability to play worsens more.

Summary of the invention

For solving above-mentioned prior art problems, the object of the present invention is to provide a kind of recording power control method of keeping the optical recorder of certain internal and external circumferential recording quality, no matter be still can not move optimal recording power at the CD that can move optimal recording power control (ROPC) to control on the CD, because of the characteristic variations of record mark, the physical change of optical disc shapes, cause the change of the length of the match on the record mark of inner periphery and the outer periphery, thereby also just caused the variation of record effect.In order to reduce the variation of the record effect that causes because of above-mentioned reason, do not utilize fixing means, but write down or, increase recording power and finish record from the detected temporal information of CD when utilizing record according to the predefined inclinator of interior periphery characteristic.

In order to achieve the above object, the recording power control method of optical recorder of the present invention, its characteristics may further comprise the steps:

First step is confirmed after the code of CD producer, finishes optimal recording power control, sets optimal recording power;

Second step according to the internal and external circumferential characteristic of described CD, is set optimal recording power and is changed;

Third step, whether the internal and external circumferential medium characteristic of judging CD is identical, if its internal and external circumferential medium characteristic is identical, then carry out record with the optimal recording power in above-mentioned second step, if its internal and external circumferential medium characteristic is inequality, then the optimal recording power of above-mentioned second step as initial value, the function of the optimal recording power of the degree of tilt by having corresponding absolute time setting is finished record.

Optimal recording power function of the present invention is characterised in that corresponding absolute time increasing or decreasing.

Effect of the present invention:

As mentioned above, the recording power control method of optical recorder of the present invention, no matter be at the CD that can move optimal recording power control (ROPC), still on the CD that can not move optimal recording power control (ROPC), because the characteristic variations of record mark or the physical change of optical disc shapes, to cause the variation of match length of the record mark of CD inner periphery and the outer periphery, thereby cause the variation of record effect.In order to reduce the variation of record effect, not directly to utilize fixing recording method, but detect temporal information when utilizing record, carry out record to increase recording power according to the degree of tilt of interior periphery characteristic setting in advance at CD, thus, can stablize the record effect of interior periphery.

Be clearer understanding purpose of the present invention, characteristics and advantage, the present invention is described in detail below in conjunction with accompanying drawing.

Description of drawings

Fig. 1 is that periphery drives (over drive) amplitude and carries out the curve map of method to set up and write pulse and moment according to the absolute time of the relative actual disc of characteristic of CD for obtaining uniform recording quality in the CD of existing optical recorder.

Fig. 2 be in existing optical recorder, write pulse and the match time shaft that forms according to its on graph of relation.

Fig. 3 is the process flow diagram of the recording power control method of optical recorder according to the present invention.

Fig. 4 is the process flow diagram of another preferred embodiment of the recording power control method of optical recorder according to the present invention.

Fig. 5 is the curve map of the big small function of the optimal recording power of relative absolute time in according to the recording power control method of optical recorder of the present invention.

Embodiment

Fig. 3 is the recording power control method process flow diagram of optical recorder of the present invention.

With reference to Fig. 3 the recording power control method of optical recorder of the present invention is described, at first, confirms to confirm the record start order (step 300, step 310) of data after producer's code of CD.

Then, confirm record start time (T ₀) (step 320) afterwards, its record start time (T ₀) suitable CD be set in record with recording method (Write strategy) and generate in the chip (step 330) with signal.

The definition of so-called here recording method (Write strategy) is meant recording impulse and moment driving (overdrive) amplitude of the match (pit) that reaches 3 ~ 11T, from record start time (T ₀) to (T writing time arbitrarily _n) record effect, i.e. vibration is set to minimum as far as possible.

To each CD, the data that obtain according to the record that experimentizes at interior week and most peripheral, ask the variation of pulse amplitude, and ask recording impulse amplitude and moment driving amplitude over time, the record that preestablishes ROM (read-only memory) one class generates in the chip with signal.

At power calibration area (PCA), power is quantitatively increased, carry out N test record, when vibration reaches hour, set optimal recording power (P ₀) come.(step 340)

Then, from record start time (T ₀) rise, with the optimal recording power (P of above-mentioned setting ₀) opening entry (step 350).

Confirm the random time information (T of CD _n) afterwards, generate in the chip with signal at record, this time (T is set _n) interior recording method (step 360).

Judge that whether record finishes, if want to proceed record, then restarts to get final product (step 370) from described step 360.

Fig. 4 is the process flow diagram of another embodiment of the recording power control method of optical recorder of the present invention.

With reference to Fig. 4, the recording power control method of optical recorder of the present invention: at first confirm (step 400) behind the CD producer code,, set optimal recording power (step 410,420), this identical with shown in Fig. 3 by optimal recording power control (OPC).

Then, whether the internal and external circumferential medium characteristic of judging CD identical (step 430), if its medium characteristic is identical, then the optimal recording power with above-mentioned steps 420 writes down (step 440); If its medium characteristic is inequality, then the optimal recording power of above-mentioned steps 420 is decided to be initial value, carry out (or finishing) record (step 450) with the function of the optimal recording power of the degree of tilt of setting fixed value.

Fig. 5 is the curve map of the function of corresponding absolute time optimal recording power size in the optical disk device recording Poewr control method of the present invention.

With reference to Fig. 5, for the different CD of internal and external circumferential medium characteristic, not according to the existing recorded mode, but, be set to corresponding absolute time the optimal recording power (ORP:Optimun Recording Power) of initial value as " optimal recording power control (OPC) execution result " gained, increase progressively or successively decrease with fixing degree of tilt, medium characteristic at CD, change optimal recording power, the line item of going forward side by side is in the hope of stablizing of internal and external circumferential record effect.

Though the present invention describes with reference to current specific embodiment, but those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the present invention, should understand and wherein can make variations and modifications and do not break away from the present invention in a broad sense, so be not 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 distortion of the above embodiment.

Claims (2)

1. the recording power control method of an optical recorder is characterized in that, may further comprise the steps:

First step is confirmed after producer's code of CD, finishes optimal recording power control, and optimal recording power is set;

Second step according to the internal and external circumferential characteristic of above-mentioned CD, is provided with optimal recording power and changes;

Third step, whether the internal and external circumferential medium characteristic of judging CD is identical, if its internal and external circumferential medium characteristic is identical, then carry out record with the optimal recording power in above-mentioned second step, if its internal and external circumferential medium characteristic is inequality, then the optimal recording power of above-mentioned second step as initial value, the function of the optimal recording power of the degree of tilt by having corresponding absolute time setting is finished record.

2. the recording power control method of optical recorder as claimed in claim 1 is characterized in that, described optimal recording power function is corresponding absolute time increasing or decreasing.

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