CN1226727C - Method for Determining Writing Power of Data Recording Device - Google Patents

Abstract

A method for determining the writing power of a data recording device to a record carrier. First, optimum power detection is performed for an inner portion and an outer portion of the record carrier, thereby obtaining an inner optimum recording power and an outer optimum recording power, respectively. The inner-rim optimum recording power and the outer-rim optimum recording power are used as reference basis for the data recording apparatus to determine the recording power from the inner rim to the outer rim of the record carrier. Or, the recording power of the data recording device is determined on average according to the inner-circle optimal recording power, the outer-circle optimal recording power and the time of the data recording device increasing from the lowest recording speed to the highest recording speed.

Description

Method for Determining Writing Power of Data Recording Device

(1) Technical field

The present invention relates to a method for determining the recording power of a data recording device, and in particular to a method for determining the recording power of a data recording device according to the optimal recording power of the inner circle and the optimum recording power of the outer circle of the record carrier. How to determine the write power of the power data recording device.

(2) Background technology

In recent years, in the evolution of data storage media, optical storage media, such as compact discs (CD), recordable compact discs (CD-R, CD-RW), etc., have played a very important role. The rise of optical storage media has replaced the previous low-capacity and bulky data storage types, enabling data to be recorded and backed up on high-capacity and easy-to-carry thin and light discs.

FIG. 1 is a schematic block diagram of an optical drive servo system. After the optical pickup 11 emits laser light, the reflected signal is obtained from the disc 10. After the signal is amplified and processed by the radio frequency IC 12, the focus error signal (FE), tracking error signal (TE), and other related data and signals Send into digital signal processor (DSP) and microprocessor (Micro Processor) 13.

After calculation by the microprocessor 13, each servo drive signal can be obtained and sent to each servo mechanism (Servo) (focus servo 14, tracking and tracking servo 15, and spindle motor servo 16) to control each controlled drive component (focus actuator 17 , tracking actuator 18 , transport (Sled) motor 19 and spindle motor 20 ) to ensure the correctness of data reading or writing.

During the burning process, the data is first transmitted from the hard disk or the read-only optical drive to the host through the integrated drive electronics (Integrated Drive Electronics, IDE) interface, and then by the integrated drive electronics interface or the small computer system interface (Small Computer System Interface, SCSI) to the buffer memory (Buffer Memory) of the CD-ROM drive. Finally, the burning CD driver burns the data temporarily stored in the buffer memory to the recordable CD.

In the conventional technology, during the process of burning a recordable optical disc in the zone constant linear velocity mode (ZCLV mode), the burning optical drive is usually only based on the best recording speed of the inner circle. The power and the power corresponding to each time zone are prestored in the recorder database to gradually increase the burning speed of the burning disc to the maximum burning speed of the burning optical drive or the burning speed customized by the user.

Figure 2 shows the variation of programming power in different time periods when programming in ZCLV mode in the prior art. As shown in the figure, in the interval of time 0~t1, the programming speed is 16 times faster; During the interval of time t1~t2, the programming speed is increased from 16x to 20x; during the interval of time t2~t3, the programming speed is increased from 20x to 24x; after time t3, the programming speed is increased from 24x to The maximum burning speed of the burning optical drive is 32 times, and this burning speed is maintained until the burning is completed.

The writing power (laser optical power) of the optical pickup head of the burning optical drive to the record carrier is one of the important keys to determine the success or failure of burning. In the conventional method, the writing power is only based on the optimal writing power (Optimum Power Calibration; OPC) of the inner ring of the record carrier and the power difference corresponding to each time zone of different brand record carriers stored and recorded in the database in advance. Decide. Taking the programming speed in Figure 2 as an example, suppose that after the inner part of the record carrier of a brand A brand has passed the Optimum Power Calibration (OPC), the optimal writing power of the inner ring is P0, and the data in the database is The recorded power difference between 20x speed and 16x speed is ΔP1; the power difference between 24x speed and 16x speed is ΔP2; and the power difference between 32x speed and 16x speed is ΔP3. Therefore, when the CD-ROM drive burns the record carrier of brand A at 16 times speed (0 to t1 time zone), its writing power is P0; when burning the record carrier of brand A brand at 20 times speed (time zone section), the writing power is P0+ΔP1; when burning the record carrier of brand A at 24x speed (t2 to t3 time section), the writing power is P0+ΔP2; and burning brand A at 32x speed At the time of the record carrier (after t3), its writing power is P0+ΔP3.

In addition, FIG. 3 shows another example of the change of the burning speed of the conventional burning CD-ROM drive. As shown in the figure, in the interval of time 0~t4 when the burning CD-ROM drive increases from the lowest burning speed to the highest burning speed, the burning The recording speed is increased from 16 times on average to the maximum recording speed of 32 times, which is the maximum recording speed of the CD-ROM drive, and this recording speed is maintained until the recording is completed.

However, the problem often encountered in the prior art is that the quality of each record carrier cannot be kept consistent. For example, if the dyes in the inner and outer circles of each batch of record carriers or the same record carrier are not uniform or have different concentrations, Determining the writing power from the inside to the outside only based on the best writing power difference of the inner ring will be different from the actual required writing power, which will easily lead to writing failure. Moreover, as shown in FIG. 2 in the conventional technology, the writing power or power difference ( ΔP1, ΔP2, ΔP3...) in the database.

(3) Contents of the invention

In view of this, the main purpose of the present invention is to provide a method for determining the recording power of a recording device, which dynamically determines the data recording device according to the optimal recording power of the inner ring and the optimal writing power of the outer ring of the record carrier. writing power.

In order to achieve the above object of the present invention, it can be realized by the method for determining the writing power of the data recording device provided by the present invention.

A method for determining the writing power of a data recording device according to one aspect of the present invention is used for a record carrier, and the record carrier is divided into a plurality of sections according to a plurality of writing multiple speeds, and each of the writing sections corresponds to the One of double-speed writing, and the plurality of sectors also includes an innermost sector and an outermost sector, the method for determining the writing power includes at least the following steps: (a) corresponding the record carrier to an outermost sector The innermost section of the inner circle writing double speed is subjected to a first optimal power detection, thereby obtaining an innermost circle optimum writing power; (b) corresponding the record carrier to an outermost circle writing double speed The outermost section performs a second optimum power detection, thereby obtaining an outermost optimum writing power; and (c) using the innermost optimum writing power, the outermost optimum writing power The power and the writing speed corresponding to each of the plurality of sectors are used as a reference when the record carrier determines the writing power.

When the record carrier is a recordable optical disc, the outer circle refers to the lead-out area, that is, the range from the center to the radius of 11.6 cm to the radius of 11.8 cm as specified in the specification.

According to another aspect of the present invention, a method for determining the writing power of a data recording device to a record carrier during a recording process, the data recording device has a lowest writing multiple speed in the innermost section of the record carrier, The data recording device has a highest writing speed in the outermost section of the record carrier, and the time for the data recording device to increase from the lowest writing speed to the highest writing speed is Δt, characterized in that the method The method comprises the following steps: (a) performing a first optimum power detection on the innermost section of the record carrier, thereby obtaining an innermost optimum writing power P1; (b) performing a first optimum power detection on the innermost section of the record carrier A second optimum power detection is performed on the outer circle section, thereby obtaining an outermost circle optimum writing power P2; and (c) a t-th optimum writing power Pt of the data recording device at a time point t is The calculation basis is based on the P1, the P2, the time point t and the time Δt.

Wherein, the data recording device may be a burning optical disc drive, and the recording carrier may be a recordable optical disc.

For a clearer understanding of the purpose, features and advantages of the present invention, the preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings.

Examples are described in detail.

(4) Description of drawings

FIG. 1 is a schematic block diagram of an optical drive servo system.

FIG. 2 shows an example of the variation of the burning speed of the conventional burning optical drive.

FIG. 3 shows another example of changes in the recording speed of a conventional recording drive.

FIG. 4 is a flow chart showing a method for determining the writing power of the data recording device according to the first embodiment of the present invention.

FIG. 5 is a schematic diagram showing the variation of writing power according to the first embodiment of the present invention.

FIG. 6 is a flowchart showing a method for determining a writing power of a data recording device according to a second embodiment of the present invention.

FIG. 7 is a schematic diagram showing the variation of writing power according to the second embodiment of the present invention.

(5) specific implementation

FIG. 4 is a flow chart showing a method for determining the writing power of the data recording device according to the first embodiment of the present invention. The method for determining the writing power of the data recording device according to the embodiment of the present invention can be implemented on a recording optical drive (data recording device).

First, as in step S40 , an optimal power detection is performed on the inner circle of the record carrier, so as to obtain an optimum writing power for the inner circle. Afterwards, as in step S42, the optimum power detection is performed on the outer circle of the record carrier, so as to obtain an optimum writing power for the outer circle. Wherein, the record carrier may be a recordable optical disc.

Finally, as shown in step S44, the optimum writing power of the inner circle and the optimum writing power of the outer circle are used as a reference for the data recording device to determine the writing power from the inner circle to the outer circle of the record carrier.

Taking Fig. 5 as an example, it is assumed that the data recording device has four recording areas at 16x, 20x, 24x and 32x speeds when performing programming according to time, and the inner circle of the record carrier performs optimal power detection. The obtained optimum writing power of the inner circle is P1, and the optimum writing power of the outer circle obtained by performing the optimum power detection on the outer circle of the record carrier is P2.

Therefore, the data recording device uses the best writing power of the inner circle and the best writing power of the outer circle as the reference basis for determining the power when writing to the record carrier, and in the linear speed mode such as partition, it can be based on the following Example calculations:

Writing power of a certain section = optimal writing power of the inner circle + (difference between best writing power of the inner and outer circles) × [(writing speed of this section - writing speed of the inner circle)/(final writing speed -inner ring write double speed)]

Therefore, in this embodiment, if the best writing power of the inner ring is P1 and the best writing power of the outer ring is P2 and the writing speed of the inner ring is 16 times speed, then the writing power corresponding to the writing area of 20 times speed Set to P1+(P2-P1)×((20-16)/(32-16)); the writing power corresponding to the 24x speed writing area is set to P1+(P2-P1)×((24-16)/ (32-16)); and the writing power corresponding to the writing area of 32 times speed is set as the best writing power of the outer ring is P2.

FIG. 6 is a flowchart showing a method for determining a writing power of a data recording device according to a second embodiment of the present invention. The method for determining the writing power of the data recording device according to the embodiment of the present invention can be implemented on a recording optical drive (data recording device).

Firstly, as in step S60, an optimal power detection is performed on the inner circle of the record carrier, so as to obtain an optimum writing power for the inner circle. Afterwards, as in step S62, the optimum power detection is performed on the outer circle of the record carrier, so as to obtain an optimum writing power for the outer circle. Wherein, the record carrier may be a recordable optical disc.

Finally, as in step S64, according to the time when the data recording device increases from the lowest writing speed to the highest writing speed, and the best writing power of the inner ring and the best writing power of the outer ring are used as the data recording device to determine the Reference when writing power from the inner to the outer circumference of the record carrier.

Taking Figure 7 as an example, it is assumed that the time for the data recording device to averagely increase from the lowest recording speed (for example, 16 times speed) to the highest recording speed (32 times speed) is t4 (0~t4), and the inner circle of the record carrier is The best recording power of the inner ring obtained by the best power detection is P1, and the best writing power of the outer ring obtained by the best power detection of the outer ring of the record carrier is P2.

Therefore, according to the time for the data recording device to increase from the lowest writing speed to the highest writing speed, the writing power of the specified data recording device at each time point within the boosting time is averaged. In this example, during the time from 0 to t4, the write power at each time point is proportional to the ratio of the time point in the entire boost time.

Taking any time point t in the writing process (0-t4) as an example, the writing power (Pt) at the time point t is set as P1+(P2-P1)×(t/t4). Among them, the writing power of the inner circle is P1 (that is, at the beginning of burning, the writing power is set to P1); the writing power of the outer circle is P2 (that is, when the data recording device is increased to the highest writing speed (t4) , then the writing power is set to P2).

Therefore, with the method for determining the writing power of the data recording device provided by the present invention, it is possible to dynamically determine the recording power of the data recording device in each recording area according to the optimum writing power of the inner circle and the optimum writing power of the outer circle of the record carrier at the same time. The writing power of a segment is not based only on the pre-stored data in the database as in the prior art, thus reducing the burning failure caused by the quality problems of different recording carriers.

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person familiar with the art may make various equivalent changes or equivalents without departing from the spirit and scope of the present invention. Replacement, for example, the algorithm of the power used by each writing segment obtained according to the best writing power of the inner circle and the best writing power of the outer circle. Therefore, the protection scope of the present invention should be defined by the claims.

Claims (10)

1. a data recording equipment writes the record power decision method, be used for a record carrier, this record carrier is divided into plurality of sections according to a plurality of record times speed of writing, each this write the record section and write doubly one of speed of record corresponding to this, and this plurality of sections also comprises inner ring section and an outmost turns section, and this is write the record power decision method and comprises the following step at least:

(a) with this record carrier corresponding to inner ring write record doubly this inner ring section of speed carry out one first best power and detect, thereby obtain inner ring optimum writing capability;

(b) this record carrier is write this doubly fast outmost turns section of record corresponding to an outmost turns and carry out the detection of one second best power, thereby obtain an outmost turns optimum writing capability; And

Reference frame when (c) writing record doubly speed is write record power as this record carrier decision with this of this inner ring optimum writing capability, this outmost turns optimum writing capability and each this plurality of sections correspondence.

2. the method for claim 1, it is characterized in that, be used for one and mark off a plurality of subregion Constant Linear Velocity patterns of writing the record section, each this write the record section and write doubly speed of record corresponding to one, wherein, one write the record section according to above-mentioned steps (a) to (c) gained write the record power be:

Above-mentioned inner ring optimum writing capability+(above-mentioned inside and outside circle optimum writing capability is poor) * [(this write the record section write record times speed-inner ring write doubly speed of record)/(finally write record times speed-inner ring write doubly speed of record)].

3. the method for claim 1 is characterized in that, described outer ring is meant the zone of drawing of described record carrier.

4. the method for claim 1 is characterized in that, this data recording equipment is a burning CD-ROM drive.

5. the method for claim 1 is characterized in that, this record carrier is a recordable CD.

6. a data recording equipment is write in the record process one a record carrier is write the record power decision method, this data recording equipment has the minimum doubly speed of record of writing at the inner ring section of this record carrier, this data recording equipment has the highest doubly speed of record of writing at the outmost turns section of this record carrier, and this data recording equipment by this minimum write record doubly speed be promoted to this and the highlyest write record doubly time of speed is Δ t, it is characterized in that this method comprises the following steps:

(a) this inner ring section of this record carrier is carried out one first best power and detect, thereby obtain inner ring optimum writing capability P1;

(b) this outmost turns section with this record carrier carries out the detection of one second best power, thereby obtains an outmost turns optimum writing capability P2; And

(c) this data recording equipment is as basis with this P1, this P2, this time point t and this time Δ t in the t optimum writing capability Pt of a time point t.

7. method as claimed in claim 6 is characterized in that, described write arbitrary time point t in the record process to write record power be P1+ (P2-P1) * (t/ Δ t).

8. method as claimed in claim 6 is characterized in that, described outer ring is meant the zone of drawing of described record carrier.

9. method as claimed in claim 6 is characterized in that, this data recording equipment is a burning CD-ROM drive.

10. method as claimed in claim 6 is characterized in that, this record carrier is a recordable CD.

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