KR20070096784A - Recoding method, recording apparatus, and optical recording medium therefor - Google Patents

Abstract

A recording method, a recording device, and an optical recording medium thereof are provided to improve quality of a play signal for a high-speed recording medium. A recording method includes a step of generating a box-type recording pattern including a first pulse(70) with a first power level(Pw1) and length(72) decided according to the length of a recorded mark, and a second pulse(80) with a lower power level(Pw2) than the first power level; and a step of recording data according to the recording pattern. The second pulse is arranged at a rear portion of the recording pattern to control a rear part of the mark. A recording device comprises a recording waveform generating unit and a pickup unit. The recording waveform generating unit generates the box-type recording pattern having the first pulse with the first power level, and the second pulse with the lower power level than the first power level. The pickup unit records the data according to the recording pattern.

Description

Recording method, recording apparatus and optical recording medium therefor {Recoding method, recording apparatus, and optical recording medium therefor}

1 is a waveform diagram of a multi-pulse recording pattern according to the prior art;

2 is an example of a multi-pulse recording pattern and marks formed thereon,

3 is a waveform diagram of a single pulse recording pattern according to the prior art;

4 is an example of a single pulse recording pattern and a mark formed accordingly;

5 is an example of a recording apparatus according to the present invention;

6 is another example of the recording apparatus according to the present invention;

7 is an example of a box-shaped recording pattern and marks formed according to the present invention;

8 shows a first example of a box-shaped recording pattern according to the present invention;

9 is a second example of a box-shaped recording pattern according to the present invention;

10 is a third example of the box-shaped recording pattern according to the present invention;

11 is a fourth example of the box-shaped recording pattern according to the present invention;

12 is a fifth example of the box-shaped recording pattern according to the present invention;

13 is a sixth example of the box-shaped recording pattern according to the present invention;

14 is a flowchart of a data recording method according to the present invention;

15 is a flowchart of a parameter recording method according to the present invention;

16 is a flow chart of a method of reading and using parameters from an information storage medium in accordance with the present invention.

The present invention relates to a method, a recording apparatus, and an optical recording medium to improve the quality of a reproduction signal from a high speed recording medium.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information storage medium comprising an optimal recording waveform for improving jitter characteristics according to high speed recording, and a method and apparatus for recording data thereon.

In general, an information storage medium, such as an optical disk, is widely used as an information storage medium of an optical pickup apparatus for recording / reproducing information in a non-contact manner, and may be a compact disk (CD) or a digital multifunction disk (DVD) according to the information recording capacity. ; digital versatile disk). Also, as a disc capable of recording, erasing and playing back information, 650MB CD-R, CD-RW, 4.7GB DVD + R / RW (rewritable), DVD-RAM (random access memory), DVD-R / RW (rewritable) And 650MB CD and 4.7GB DVD-ROM. Furthermore, high-density optical discs (HD-DVD) having a recording capacity of 20 GB or more are also being developed.

Recording data on an optical disc, which is one of the optical recording media, means forming a mark on a track formed on the optical disc. In the case of a read-only disc such as a CD-ROM (Compact Disc Read Only Memory) or a DVD (Digital Versatile Disc) -ROM, the mark is formed of a pit. In the case of recordable discs such as CD-R (Recordable) / RW (Rewritable), DVD-R / RW / RAM (Random Access Memory), the recording layer is coated with a phase change film that changes crystalline or amorphous depending on temperature. It is formed through the phase change of the phase change film. In the case of such a recordable disc, a technique called a recording strategy is introduced to optimize the recording / reproducing characteristic, and the write strategy is applied differently according to the disc. In addition, the recording conditions may vary depending on the drive, and thus there may be no compatibility between the optical recording medium and the drive.

 In particular, the recording speed should also be improved due to the user's demand for recording in a short time as the high capacity.

High-density optical recording devices such as next-generation BDs record in the RLL (1,7) code system having the shortest T of 2T. In such a case, the laser output waveform currently forming a recording mark of constant length is basically a multi-pulse in which the number of recording pulses increases with the length of the recording mark, the configuration of which is shown in FIG. As described above, when the length of the recording mark is N times the time period T, a recording strategy consisting of N-1 recording pulses is used. In this case, it is difficult to switch the laser diode to make a multi-pulse at high speed, recording proceeds at high speed, and there is no effect of multi-pulse, and it is difficult to transfer enough heat from the laser diode to the recording medium in a short time. This causes poor mark formation. Therefore, a write strategy composed of new pulses is needed to overcome this phenomenon.

1 is a reference diagram showing a recording waveform according to the conventional method.

Referring to Fig. 1, a conventional recording waveform for recording Non Return to Zero Inverted (NRZI) data is shown. Here, T means a period of the reference recording / reproducing clock signal. According to the mark edge recording method, a high level of NRZI data is recorded as a mark and a low level is formed as a space. The recording waveform used to record the mark is called a recording pattern, and the recording waveform used to form the space (used to erase the mark) is called an erase pattern. The conventional recording waveform uses multiple pulses as the recording pattern, and adjusts the power level of each pulse to three levels of Pw, Pe and Pb. That is, the power level of the recording multi-pulse constituting the recording pattern has Pw and Pb. In particular, the power Pe of the erase pattern for forming a space which is a low level of NRZI data is kept constant at a predetermined DC level. Here, Pw means writing power, Pb means bias power, and Pe means erase power.

Referring to Figure 1, it is an N-1 write strategy that is an example of a conventional multi-pulse. The laser output waveform that forms a recording mark of a certain length is basically a multi-pulse in which the number of recording pulses increases with the length of the recording mark, and its configuration is when the length of the recording mark is N times the time period T. (2T, 3T, etc.), there are N-1 write pulses. For example, for recording 5T marks, 5-1 = 4 write pulses.

The table below shows the recording conditions using the multi-pulse write strategy.

Laser wavelength 405 nm Numerical Aperture 0.85 User data transfer rate 35.965 (Mbit / s) x 4x Recording velocity 4.92 (m / s) x 4x User data capacity 25 Gbyte Track Pitch 0.32 μm

The table below shows the results of comparing the recording quality (jitter) at each double speed using the multi-pulse recording strategy.

1x recording jitter result 5.6% Double-speed recording jitter result 6.4% 4x recording jitter result 10.0%

Looking at the table above, the N-1 strategy is applied at 4x speed (rotational speed of about 10000 RPM), and the jitter increases rapidly compared to the 1x or 2x result.

Fig. 2 is a simulation result of recording marks formed by quadruple speed recording using a multi-pulse recording strategy in the BD-R.

This can be seen from the simulation results, which show that the heat transfer by the recording pulse does not effectively affect the recording mark formation when viewed in the form of marks. In the form of inconsistent marks, it is difficult to achieve optimal mark formation and mark length control with the multi-pulse type recording strategy used.

3 is a recording strategy having a box-shaped recording pattern including one pulse according to the prior art. Referring to Fig. 3, the laser output waveform forming a recording mark of constant length is composed of one pulse irrespective of the length of the recording mark, and each T is determined by the length of the pulse.

The table below shows the recording system conditions using the box-type recording strategy.

Laser wavelength 405 nm Numerical Aperture 0.85 User data transfer rate 35.965 (Mbit / s) x 4x Recording velocity 4.92 (m / s) x 4x User data capacity 25 Gbyte Track Pitch 0.32 μm

The table below shows the results of 4x speed recording quality (jitter) using boxed recording strategy.

4x recording jitter result 6.8%

Fig. 4 is a simulation result of recording marks formed by quadruple speed recording using box-type recording strategy in the BD-R.

To solve the problem caused by using multi-pulse recording strategy at high speed, as shown in the above figure, recording by applying box-type recording strategy at 4 times speed (rotation speed of about 10000 RPM or less) If you try it, jitter gives better results than with multi-pulse write strategy. Observing the simulation result, the mark is formed in one shape. This phenomenon can be seen that the heat transfer is sufficient for the formation of the mark. However, when viewed in the state of forming the leading and trailing marks, it can be observed that the marks become larger toward the ends of the marks. This is a result of increased heat accumulation than in the case of multi-pulse write strategy. For this reason, it is difficult to control the formation of mark edges at the ends.

As in the above two cases, at the recording speed of about 10000 RPM or more, the switching of the laser diode itself to realize the multi-pulse recording strategy, which is widely used now, is difficult, and is transmitted to the recording medium per unit time. Since the amount of heat itself is small, it is not suitable for the formation of recording marks. Therefore, in terms of laser diode switching, the jitter shows better results than in the case of multi-pulse write strategy, which is simpler and writes boxed write strategy to enable more heat transfer per unit time. If you try it, you can see that the trailing side is larger than the leading side. This is a result of increased heat accumulation than in the case of multi-pulse write strategy. Therefore, there is still room for improvement in terms of optimal recording strategy at high speed.

SUMMARY OF THE INVENTION An object of the present invention is to provide a recording apparatus, a recording method, and an optical recording medium capable of improving the quality of a reproduction signal by solving the above problems and facilitating the adjustment of the trailing portion of a mark in a high speed recording medium. do.

One feature of the present invention for solving the above problems is a method for recording data on an optical recording medium, comprising: a first pulse having a length determined according to the length of a mark to be recorded and having a first power level; Generating a box-shaped recording pattern composed of second pulses having a power level lower than the first power level, and recording data according to the recording pattern.

The second pulse is preferably arranged at the end of the recording pattern for adjustment of the end of the mark.

When the length of the mark to be written is nT, the second pulse preferably starts at the point (n-1) T.

The first pulse of the box-shaped recording pattern may start from a first position spaced apart from a first interval by a time of 1T for the recording mark or from a first interval from a time of 1T for the recording mark. It is preferable to start from the 1 position.

The length of the box-shaped recording pattern is preferably determined by the length from the start of the first pulse to the end of the second pulse.

The length of the box-shaped recording pattern is preferably determined by the sum of the length of the first pulse and the length of the second pulse.

The length of the first pulse is determined by the distance from the start point of the first pulse to the start point of the second pulse, and the second pulse is terminated at a second position separated by a second interval from the end point of the recording mark. Do.

The generating of the recording pattern preferably includes reading parameter information for the box-shaped recording pattern from the optical recording medium and generating the box-shaped recording pattern based on the read parameter information.

According to another aspect of the present invention, there is provided a method of recording recording pattern information on an optical recording medium, the method comprising: generating the recording pattern information, and recording the generated recording pattern information in a predetermined area of the optical recording medium. Wherein the recording pattern information comprises a box-shaped recording pattern comprising a first pulse having a length determined according to the length of a mark to be recorded and having a first pulse having a first power level and a second pulse having a power level lower than the first power level. It contains information about.

The information on the box-shaped recording pattern may include a start point of a first pulse starting from a first position spaced apart from a first interval by a time of 1T for the recording mark, and the second pulse from a time at which the first pulse starts. It is preferable to include the length of the box-shaped recording pattern determined by the length up to the end point.

The information on the box-shaped recording pattern includes a starting point of the first pulse starting from a first position spaced apart from a first time interval from the starting point for the recording mark, and starting time of the first pulse and ending time of the second pulse. It is preferable to include the length of the box-shaped recording pattern determined by the length of.

The information on the box-shaped recording pattern includes a starting point of the first pulse starting from a first position separated by a first interval from a time point of 1T for the recording mark, and starting from the starting point of the first pulse. It is preferable to include the length of the said 1st pulse determined by the distance to a starting point, and the end point of the said 2nd pulse ending in the 2nd position spaced apart by a 2nd distance from the end point of the said recording mark.

The information on the box-shaped recording pattern is a start point of the first pulse starting from a first position spaced apart from the time point for the recording mark by a distance from the start point of the first pulse to the start point of the second pulse. It is preferable to include the length of the first pulse to be determined, and the end point of the second pulse which is terminated at a second position apart from the end point of the recording mark by a second interval.

The information on the box-shaped recording pattern includes a starting point of the first pulse starting from a first position separated by a first interval from a time point of 1T for the recording mark, and starting from the starting point of the first pulse. It is preferable to include the length of the said 1st pulse determined by the distance to a starting point, and the end point of the said 2nd pulse ending in the 2nd position spaced apart by a 2nd distance from the end point of the said recording mark.

The information on the box-shaped recording pattern is a start point of the first pulse starting from a first position spaced apart from the time point for the recording mark by a distance from the start point of the first pulse to the start point of the second pulse. It is preferable to include the length of the first pulse to be determined, and the end point of the second pulse which is terminated at a second position apart from the end point of the recording mark by a second interval.

The information about the box-shaped recording pattern may further include a time point at which the cooling pulse spaced a predetermined interval from the time point at which the recording data ends.

Another feature of the present invention is an apparatus for recording data on an optical recording medium, comprising: a first pulse having a length determined according to the length of a mark to be recorded and having a first power level and a power lower than the first power level And a recording waveform generation section for generating a box-shaped recording pattern composed of second pulses having a level, and a pickup section for recording data in accordance with the recording pattern.

A further aspect of the present invention is an apparatus for recording recording pattern information on an optical recording medium, comprising: a first pulse having a length determined according to the length of a mark to be recorded and having a first power level and the first power level; And a control section for generating information on a box-shaped recording pattern composed of second pulses having a low power level, and a pickup section for recording the generated recording pattern information in a predetermined area of the optical recording medium.

Another aspect of the present invention is an optical recording medium for use in a recording / reproducing apparatus, comprising: an area in which recording pattern information is recorded, the recording pattern information having a length determined according to the length of a mark to be recorded And a box-shaped recording pattern composed of a first pulse having a first power level and a second pulse having a power level lower than the first power level.

The present invention will now be described in detail with reference to the accompanying drawings.

5 is an example of a recording apparatus according to a preferred embodiment of the present invention.

Referring to FIG. 5, the recording apparatus is an apparatus for recording data by forming a mark or a space on the optical recording medium 100. The recording apparatus includes a pickup unit 10, a recording waveform generator 20, and a channel modulator 30. ).

The channel modulator 30 modulates data input from the outside into a channel bit string.

The recording waveform generating unit 20 is provided with a channel bit string, and generates a recording waveform for recording the channel bit string based on the information on the recording pattern. The recording waveform generated according to the present invention includes a box-shaped recording pattern composed of a first pulse having a first power level and a second pulse having a power level lower than the first power level. Detailed description of the recording waveform will be given later. The pickup unit 10 irradiates the optical recording medium 100 with light according to the generated recording waveform to form a mark or a space. The pickup unit 10 includes a motor for rotating the optical recording medium 100, an optical head for irradiating laser light onto the optical recording medium 100 or receiving laser light reflected from the optical recording medium 100, a motor. And a laser circuit for driving a laser provided in the optical head and a servo circuit for servo controlling the optical head.

The recording apparatus according to the present invention performs a recording and erasing test for predetermined test data (any data or predetermined data) in a test area of the optical recording medium based on the parameter information of the box-shaped recording pattern, and the test result According to the test conditions, the best condition (e.g., the jitter value is the minimum, the resolution is the highest, the modulation degree is the maximum, etc.) is selected and provided to the recording waveform generation unit 20. Can be.

6 is another example of the recording apparatus according to the preferred embodiment of the present invention.

Referring to FIG. 6, a recording apparatus is an apparatus for recording data by forming a mark or a space on an optical recording medium 100. The recording apparatus includes a pickup unit 10, a recording waveform generator 20, and a channel modulator 30. ), A signal processor 40, and a controller 50.

The channel modulator 30 modulates data input from the outside into a channel bit string.

The recording waveform generating unit 20 receives a channel bit string and generates a recording waveform for recording the channel bit string. The pickup section 10 irradiates the optical recording medium 100 with light in accordance with the generated recording waveform to form a mark or a space.

The channel modulator 30 modulates the input data into a channel bit string and outputs NRZI (Non Return to Zero Inverted) data. The recording waveform generator 20 generates a recording waveform for recording the NRZI data and provides it to the laser driving circuit 14 provided in the pickup section 10.

The laser drive circuit 14 forms a mark or a space on the optical disc 100 by controlling the laser using the received recording waveform.

In particular, according to the present invention, the pickup section 10 reads out information about the recording pattern from a predetermined area of the optical recording medium 100. The signal processor 40 transmits the information about the read recording pattern to the controller 50 by performing a predetermined signal processing, and the controller 50 provides the record waveform generation unit 20 with information about the received recording pattern. . The recording waveform generator 20 generates a recording waveform for recording the channel data received from the channel modulator 30 based on the information about the recording pattern provided from the controller 60. The information about the recording pattern read out from the optical recording medium 100 may include a box-shaped recording pattern composed of a first pulse having a first power level and a second pulse having a power level lower than the first power level according to the present invention. Contains parameter information for generation. Detailed description of the parameter information for generating the box-shaped recording pattern will be given later.

7 shows an example of a box-shaped recording pattern and marks formed according to the present invention. Fig. 7A shows the NRZI data for the 5T mark, (b) shows the recording pattern according to the present invention for recording the 5T mark, and (c) shows the recording according to the present invention shown in (b). The pattern shows the form of the mark formed on the information storage medium.

Referring to FIG. 7A, the NRZI data for the 5T mark becomes a rising edge at the start point 90 and a falling edge at the end point 95. 91 is where the NRZI data for the 5T mark starts by 1T, 92 is by 2T, 93 is by 3T, 94 is by 4T 95 is the point where 5T has passed.

Referring to FIG. 7B, the box-shaped recording pattern according to the present invention includes a first pulse 70 having a first power level Pw1 and a second pulse having a second power level Pw2 different from the first power level. It consists of 80. Preferably, the second power level Pw2 is lower than the first power level Pw1.

The first pulse 70 has a length determined according to the length of the mark, and the second pulse 80 is arranged at the end of the box-shaped recording pattern. For example, the start point of the second pulse 80 may be a position where (n-1) T when the length of the mark is nT. Referring to FIG. 7B, the length of the mark is 5T, and the starting point of the second pulse 80 is the 4T point 94. Of course, the starting point of the second pulse is not limited to (n-1) T.

Parameters of the box-shaped recording pattern according to the present invention can be determined in various forms, for example, the starting point 71 of the first pulse 70, the length 72 of the first pulse 70, the second pulse 80 ), The length 82 of the first pulse and the length 73 of the second pulse, the end point 81 of the second pulse 80, the end point of the cooling pulse, and the like. The start point 71 of the first pulse 70 may be determined as the distance from the start point 90 of the mark or as the distance from the point 91 where NRZI data for the mark has passed by 1T. . In addition, the end point 81 of the second pulse 80 may also be determined as the distance from (n-1) T or the distance from the end point 95 of the mark. Such various types of parameters will be described in detail with reference to FIGS. 8 to 13.

In the case of a high-speed medium, as shown in FIG. 7B, when data is recorded using a box-type recording pattern including two pulses having a first power level and a second power level, FIG. As shown in the drawing, a mark having a constant shape can be obtained.

The table below shows the results of four times the recording quality (jitter) using the box-type recording strategy according to the present invention. The recording conditions are the same as the recording conditions described with respect to FIG. 3, and it can be seen that the jitter result is improved by using the box-type recording strategy according to the present invention.

4x recording jitter result 6.2%

An example of parameters for a box-shaped recording pattern according to the present invention will now be described with reference to FIGS. 8 to 13. In the recording apparatus according to the present invention, a recording waveform for data recording is generated using the parameters for such a box-shaped recording pattern. In addition, the recording apparatus according to the present invention records the parameter information for such a box-shaped recording pattern in a predetermined area of the information storage medium. In the recording apparatus according to the present invention, the recording type recorded in the predetermined area of the information storage medium is thus Reads parameter information for and generates a recording waveform for data recording based on this parameter information. Parameters for the box-shaped recording pattern can be changed depending on the recording environment, for example, the recording speed, the position of the recording layer in the case of a plurality of recording layers, the material of the recording layer, and the like.

8 shows a first example of a parameter for a box-shaped recording pattern according to the present invention.

Referring to FIG. 8, the box-shaped recording pattern according to the present invention includes a first pulse 70 having a first power level Pw1 and a second pulse 80 having a second power level Pw2 lower than the first power level. do. The first example of the parameter for the box-shaped recording pattern according to the present invention includes the start point dP of the first pulse, the length P of the box-shaped recording pattern, and the end point dS of the cooling pulse.

The starting point dP of the first pulse 70 of the box-shaped recording pattern indicates the starting point of the first pulse 70 measured from the time point of 1T for the recording data, and the length P of the box-shaped recording pattern indicates the starting point of the first pulse. The length of the entire recording pulse from the time point dP to the time point EP when the second pulse 80 ends. dS represents the time point at which the cooling pulse measured from the time point at which the recording data ends.

9 shows a second example of parameters for a box-shaped recording pattern according to the present invention.

Referring to FIG. 9, the box-shaped recording pattern according to the present invention includes a first pulse 70 having a first power level Pw1 and a second pulse 80 having a second power level Pw2 lower than the first power level. It is composed. A second example of a parameter for the box-shaped recording pattern according to the present invention includes the start point dP of the first pulse, the length P of the box-shaped recording pattern, and the end point dS of the cooling pulse.

The starting point dP of the first pulse 70 of the box-shaped recording pattern indicates the starting point of the first pulse 70 measured from the start point (Mark Start Point) of the recording data. The length of the entire recording pulse is shown from the time point dP at which one pulse starts to the time point EP at which the second pulse 80 ends. dS represents the time point at which the cooling pulse measured from the time point at which the recording data ends.

10 shows a third example of a parameter for a box-shaped recording pattern according to the present invention.

Referring to FIG. 10, the box-shaped recording pattern according to the present invention includes a first pulse 70 having a first power level Pw1 and a second pulse 80 having a second power level Pw2 lower than the first power level. do. A third example of a parameter for the box-shaped recording pattern according to the present invention includes the start point dP of the first pulse, the length P of the first pulse, the end point L of the second pulse, and the end point dS of the cooling pulse.

The starting point dP of the first pulse 70 of the box-shaped recording pattern indicates the starting point of the first pulse 70 measured from the time point of 1T for recording data, and the length P of the first pulse is the starting point of the first pulse. To the start point of the second pulse, and the end point L of the second pulse indicates the time point when the second pulse measured from the end point of the first pulse (FEP) ends. dS represents the time point at which the cooling pulse measured from the end of the recording data ends.

11 shows a fourth example of the parameter for the box-shaped recording pattern according to the present invention.

Referring to FIG. 11, the box-shaped recording pattern according to the present invention includes a first pulse 70 having a first power level Pw1 and a second pulse 80 having a second power level Pw2 lower than the first power level. do. The fourth example of the parameter for the box-shaped recording pattern according to the present invention includes the start point dP of the first pulse, the length P of the first pulse, the end point L of the second pulse, and the end point dS of the cooling pulse.

The starting point dP of the first pulse 70 of the box-shaped recording pattern indicates the starting point of the first pulse 70 measured from the start point (Mark Start Point) of the recording data. The length from the start point of one pulse to the start point of the second pulse is shown, and the end point L of the second pulse indicates the time point when the second pulse measured from the end point of the first pulse (FEP) ends. dS represents the time point at which the cooling pulse measured from the time point at which the recording data ends.

12 shows a fifth example of the parameter for the box-shaped recording pattern according to the present invention.

Referring to FIG. 12, the box-shaped recording pattern according to the present invention includes a first pulse 70 having a first power level Pw1 and a second pulse 80 having a second power level Pw2 lower than the first power level. do. A fifth example of a parameter for the box-shaped recording pattern according to the present invention includes the start point dP of the first pulse, the length P of the first pulse, the end point dL of the second pulse, and the end point dS of the cooling pulse.

The starting point dP of the first pulse 70 of the box-shaped recording pattern indicates the starting point of the first pulse 70 measured from the time point of 1T for recording data, and the length P of the first pulse is the starting point of the first pulse. Indicates the length from the start point of the second pulse to the start point of the second pulse, and the end point dL of the second pulse indicates the point where the second pulse measured from the end point (Mark End Point: MEP) of the recording data ends. dS represents the time point at which the cooling pulse measured from the time point at which the recording data ends.

13 shows a sixth example of parameters for the box-shaped recording pattern according to the present invention.

Referring to FIG. 13, the box-shaped recording pattern according to the present invention includes a first pulse 70 having a first power level Pw1 and a second pulse 80 having a second power level Pw2 lower than the first power level. do. The sixth example of the parameter for the box-shaped recording pattern according to the present invention includes the start point dP of the first pulse, the length P of the first pulse, the end point dL of the second pulse, and the end point dS of the cooling pulse.

The starting point dP of the first pulse 70 of the box-shaped recording pattern indicates the starting point of the first pulse 70 measured from the start point (Mark Start Point) of the recording data. The length from the start point of one pulse to the start point of the second pulse is shown, and the end point dL of the second pulse indicates the point where the second pulse measured from the end point (Mark End Point: MEP) of the recording data ends. dS represents the time point at which the cooling pulse measured from the time point at which the recording data ends.

14 is a flowchart of a data recording method according to the present invention.

Referring to FIG. 14, NRZI data is generated (141).

Next, a recording waveform having a recording pattern in the form of a box including a first pulse set according to the mark length and a second pulse having a power level different from that of the first pulse is generated (142).

The NRZI data is recorded by forming marks or spaces using the generated recording waveforms (143).

15 is a flowchart of a parameter recording method according to the present invention.

Referring to FIG. 15, a parameter for a box-shaped recording pattern including a first pulse set according to a mark length and a second pulse having a power level different from that of the first pulse is determined (151). .

The determined parameter is recorded in the information storage medium (152).

16 is a flowchart of a method of reading and using a parameter from an information storage medium according to the present invention.

Referring to FIG. 16, a parameter for a box-type recording pattern including a first pulse set according to the length of a mark and a second pulse having a power level different from that of the first pulse is read from the information storage medium. (161).

Next, the recording conditions of the apparatus are set using the read parameters, and data is recorded on the information storage medium (162).

The recording method as described above can also be embodied as computer readable codes on a computer readable recording medium. The computer-readable recording medium includes all kinds of recording devices in which data that can be read by a computer system is stored. Examples of computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, and the like, and may also be implemented in the form of a carrier wave (for example, transmission over the Internet). Include. The computer readable recording medium can also be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion. In addition, functional programs, codes, and code segments for implementing the recording method can be easily inferred by programmers in the art to which the present invention belongs.

So far I looked at the center of the preferred embodiment for the present invention. Those skilled in the art will appreciate that the present invention can be implemented in a modified form without departing from the essential features of the present invention. Therefore, the disclosed embodiments should be considered in descriptive sense only and not for purposes of limitation. The scope of the present invention is shown in the claims rather than the foregoing description, and all differences within the scope will be construed as being included in the present invention.

According to the present invention as described above, the quality of the reproduction signal can be improved by facilitating the adjustment of the trailing portion of the mark in the high-speed recording medium.

Claims (44)

In the method of recording data on an optical recording medium, Generating a box-shaped recording pattern composed of a first pulse having a length determined according to the length of a mark to be written and having a first power level and a second pulse having a power level lower than the first power level; Recording data according to the recording pattern. The method of claim 1, And the second pulse is arranged at the end of the recording pattern for adjustment of the end of the mark. The method of claim 1, And when the length of the mark to be recorded is nT, the second pulse starts at point (n-1) T. The method of claim 1, The first pulse of the box-shaped recording pattern may start from a first position spaced apart by a first interval from a time point of 1T progress for the recording mark or a first distance spaced from a time point of time of 1T for the recording mark. The recording method, starting from one position. The method of claim 1, And the length of the box-shaped recording pattern is determined by the length from the start of the first pulse to the end of the second pulse. The method of claim 1, And the length of the box-shaped recording pattern is determined by the sum of the length of the first pulse and the length of the second pulse. The method of claim 1, The length of the first pulse is determined by the distance from the start point of the first pulse to the start point of the second pulse, the second pulse is terminated at a second position away from the end point of the recording mark by a second interval Recording method. The method of claim 1, Generating the recording pattern, And reading out parameter information for the box-shaped recording pattern from the optical recording medium, and generating the box-shaped recording pattern based on the read parameter information. A method of recording recording pattern information on an optical recording medium, Generating the recording pattern information; Recording the generated recording pattern information in a predetermined area of the optical recording medium, The recording pattern information is information about a box-shaped recording pattern comprising a first pulse having a length determined according to a length of a mark to be recorded and having a first power level and a second pulse having a power level lower than the first power level. Recording method comprising a. The method of claim 9, And the second pulse is arranged at the end of the recording pattern for adjustment of the end of the mark. The method of claim 9, And when the length of the mark to be recorded is nT, the second pulse starts at point (n-1) T. The method of claim 9, The information about the box-shaped recording pattern is A starting point of a first pulse starting from a first position spaced apart from a first interval by a time of 1T for the recording mark, and a length from a starting point of the first pulse to a ending point of the second pulse; And a length of the box-shaped recording pattern. The method of claim 9, The information about the box-shaped recording pattern is The box-shaped recording pattern determined by a starting point of the first pulse starting from a first position spaced apart from a starting point for the recording mark by a first interval, and a length from a starting point of the first pulse to a ending point of the second pulse; And the length of the recording method. The method of claim 9, The information about the box-shaped recording pattern is The first point determined as a start point of the first pulse starting from a first position spaced apart from a first interval by a time point of 1T for the recording mark, and a distance from a start point of the first pulse to a start point of the second pulse; A length of one pulse, and an end point of the second pulse which is terminated at a second position apart from the end point of the recording mark by a second interval. The method of claim 9, The information about the box-shaped recording pattern is A length of the first pulse determined by a start point of the first pulse starting from a first position spaced apart from a time point for the recording mark by a first distance, a distance from a start point of the first pulse to a start point of the second pulse, And an end point of the second pulse terminated at a second position spaced a second distance apart from an end point of the recording mark. The method of claim 9, The information about the box-shaped recording pattern is The first point determined as a start point of the first pulse starting from a first position spaced apart from a first interval by a time point of 1T for the recording mark, and a distance from a start point of the first pulse to a start point of the second pulse; A length of one pulse, and an end point of the second pulse which is terminated at a second position apart from the end point of the recording mark by a second interval. The method of claim 9, The information about the box-shaped recording pattern is A length of the first pulse determined by a start point of the first pulse starting from a first position spaced apart from a time point for the recording mark by a first interval, a distance from a start point of the first pulse to a start point of the second pulse, And an end point of the second pulse terminated at a second position spaced a second distance apart from an end point of the recording mark. The method according to any one of claims 12 to 17, The information about the box-shaped recording pattern is And a time point at which the cooling pulse at a predetermined interval from the time point at which the recording data ends is terminated. An apparatus for recording data on an optical recording medium, A recording waveform generating unit for generating a box-shaped recording pattern having a length determined according to the length of a mark to be recorded and comprising a first pulse having a first power level and a second pulse having a power level lower than the first power level; And a pickup section for recording data in accordance with the recording pattern. The method of claim 19, The recording waveform generating unit, And the second pulse is arranged at the end of the recording pattern to adjust the end of the mark. The method of claim 19, The recording waveform generating unit, And when the length of the mark to be recorded is nT, arrange the second pulse to start at the point (n-1) T. The method of claim 19, The recording waveform generating unit, Starting the first pulse of the box-shaped recording pattern from a first position spaced at a first interval from a time point of 1T for the recording mark, or a first distance spaced from a time point of 1T for the recording mark. And a recording device arranged to start from one position. The method of claim 19, The recording waveform generating unit, And the length of the box-shaped recording pattern is determined from the time point at which the first pulse starts to the time point at which the second pulse ends. The method of claim 19, The recording waveform generating unit, And the length of the box-shaped recording pattern is determined by the sum of the length of the first pulse and the length of the second pulse. The method of claim 19, The recording waveform generating unit, Determining a length of the first pulse as a distance from a start point of the first pulse to a start point of the second pulse, wherein the second pulse is arranged to end at a second position separated by a second interval from an end point of the recording mark. And a recording device. The method of claim 19, The recording waveform generating unit, And the box-shaped recording pattern is generated based on parameter information for the recording pattern read out from the optical recording medium. An apparatus for recording recording pattern information on an optical recording medium, A control unit for generating information about a box-shaped recording pattern having a length determined according to a length of a mark to be recorded and comprising a first pulse having a first power level and a second pulse having a power level lower than the first power level; And a pickup section for recording the generated recording pattern information in a predetermined area of the optical recording medium. The method of claim 27, The control unit, And the second pulse generates box-shaped recording pattern information arranged at the end of the recording pattern for adjustment of the end of the mark. The method of claim 27, The control unit, And box-type recording pattern information arranged to start the second pulse at the point (n-1) T when the mark to be recorded is nT in length. The method of claim 27, The information about the box-shaped recording pattern is A starting point of a first pulse starting from a first position spaced apart from a first interval by a time of 1T for the recording mark, and a length from a starting point of the first pulse to a ending point of the second pulse; And a length of the box-shaped recording pattern. The method of claim 27, The information about the box-shaped recording pattern is The box-shaped recording pattern determined by a starting point of the first pulse starting from a first position spaced apart from a starting point for the recording mark by a first interval, and a length from a starting point of the first pulse to a ending point of the second pulse; And a length of the recording device. The method of claim 27, The information about the box-shaped recording pattern is The first point determined as a start point of the first pulse starting from a first position spaced apart from a first interval by a time point of 1T for the recording mark, and a distance from a start point of the first pulse to a start point of the second pulse; And an end point of the second pulse which is terminated at a second position apart from the end point of the recording mark by a second length. The method of claim 27, The information about the box-shaped recording pattern is A length of the first pulse determined by a start point of the first pulse starting from a first position spaced apart from a time point for the recording mark by a first interval, a distance from a start point of the first pulse to a start point of the second pulse, And an end point of the second pulse terminated at a second position spaced a second distance apart from an end point of the recording mark. The method of claim 27, The information about the box-shaped recording pattern is The first point determined as a start point of the first pulse starting from a first position spaced apart from a first interval by a time point of 1T for the recording mark, and a distance from a start point of the first pulse to a start point of the second pulse; And an end point of the second pulse which is terminated at a second position apart from the end point of the recording mark by a second length. The method of claim 27, The information about the box-shaped recording pattern is A length of the first pulse determined by a start point of the first pulse starting from a first position spaced apart from a time point for the recording mark by a first distance, a distance from a start point of the first pulse to a start point of the second pulse, And an end point of the second pulse terminated at a second position spaced a second distance apart from an end point of the recording mark. An optical recording medium for use in a recording and reproducing apparatus, An area in which recording pattern information is recorded, The recording pattern information is information about a box-shaped recording pattern comprising a first pulse having a length determined according to a length of a mark to be recorded and having a first power level and a second pulse having a power level lower than the first power level. Optical recording medium comprising a. The method of claim 36, And the second pulse is arranged at the end of the recording pattern for adjustment of the end of the mark. The method of claim 36, And when the length of the mark to be recorded is nT, the second pulse starts at point (n-1) T. The method of claim 36, The information about the box-shaped recording pattern is From the time point of 1T time progressed for the recording mark, the starting point of the first pulse starting from the first position away from the first interval, the length from the time when the first pulse starts to the time when the second pulse ends. And the length of the box-shaped recording pattern to be determined. The method of claim 36, The information about the box-shaped recording pattern is The box-shaped recording pattern determined by a starting point of the first pulse starting from a first position spaced apart from a starting point for the recording mark by a first interval, and a length from a starting point of the first pulse to a ending point of the second pulse; And a length of the optical recording medium. The method of claim 36, The information about the box-shaped recording pattern is The first point determined as a start point of the first pulse starting from a first position spaced apart from a first interval by a time point of 1T for the recording mark, and a distance from a start point of the first pulse to a start point of the second pulse; And an end point of the second pulse which is terminated at a second position apart from the end point of the recording mark by a second length. The method of claim 36, The information about the box-shaped recording pattern is A length of the first pulse determined by a start point of the first pulse starting from a first position spaced apart from a time point for the recording mark by a first distance, a distance from a start point of the first pulse to a start point of the second pulse, And an end point of the second pulse terminated at a second position spaced a second distance away from an end point of the recording mark. The method of claim 36, The information about the box-shaped recording pattern is The first point determined as a start point of the first pulse starting from a first position spaced apart from a first interval by a time point of 1T for the recording mark, and a distance from a start point of the first pulse to a start point of the second pulse; And an end point of the second pulse which is terminated at a second position apart from the end point of the recording mark by a second length. The method of claim 36, The information about the box-shaped recording pattern is A length of the first pulse determined by a start point of the first pulse starting from a first position spaced apart from a time point for the recording mark by a first distance, a distance from a start point of the first pulse to a start point of the second pulse, And an end point of the second pulse terminated at a second position spaced a second distance away from an end point of the recording mark.

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