CN101042885B

CN101042885B - Recording method, recording apparatus, and optical recording medium

Info

Publication number: CN101042885B
Application number: CN2007100894555A
Authority: CN
Inventors: 黄郁渊; 李坰根; 大塚达宏; 郑安植; 金仁柱
Original assignee: Samsung Electronics Co Ltd
Current assignee: Samsung Electronics Co Ltd
Priority date: 2006-03-24
Filing date: 2007-03-23
Publication date: 2011-11-30
Anticipated expiration: 2027-03-23
Also published as: KR20070096784A; CA2645822C; MX2008011497A; MY147590A; KR101307540B1; BRPI0708123A2; CN101042885A; CA2645822A1; TW200737161A; TWI358064B; HK1108211A1

Abstract

A recording method, a recording apparatus, and an optical recording medium that can improve quality of a signal reproduced from a high multi-speed recording medium. The recording method includes generating a box type recording pattern including a first pulse, which has a duration determined according to a length of a recording mark and which has a first power level, and a second pulse which has a second power level different from that of the first power level, and recording data according to the box type recording pattern.

Description

Recording method, recording unit and optical record medium

The application requires the 2006-26987 korean patent application submitted in Korea S Department of Intellectual Property on March 24th, 2006 and all interests of the 2007-2675 korean patent application submitted on January 9th, 2007, and described application is disclosed in this for reference.

Technical field

Each side of the present invention relates to a kind of can the raising from recording method, recording unit and the optical record medium thereof of the quality of signals of high power speed recording media reproducing, more particularly, relate to a kind of information storage medium and be used for method and apparatus at this information storage medium identifying recording layer, this information storage medium has the best titime waveform and handles shake (jitter) effect that causes to improve by fast recording.

Background technology

Usually, for example the information storage medium of CD generally with writing down in the noncontact mode and/or the optic pick-up of information reproduction uses.According to the information recording capacity of information storage medium, information storage medium can be divided into compact disk (CD) and digital universal disc (DVD).The example that can write, wipe and read the recordable disc of information comprises that 650MB can write down CD (CD-R), can rewrite CD (CD-RW), 4.7GB DVD+R/RW, DVD random-access memory (ram) and DVD-R/RW.The example of read-only disk comprises 650MB CD ROM (read-only memory) (ROM) and 4.7GB DVD-ROM.In addition, the current high-resolution DVD (HD-DVD) that has above the recording capacity of 20GB that developing.

When data are recorded in the CD (optical record medium a kind of), in the track of CD, form mark.For read-only optical disc, as CD-ROM and DVD-ROM, with the form generation mark of pit.For CD-R,, apply phase change layer with the phase-change material that can between amorphous state and crystalline state, change as CD-R/RW and DVD-R/RW/RAM.When the phase transformation of phase change layer experience, in CD-R, form mark.In order to optimize record and/or reproducing characteristic, CD-R adopts writes strategy.Use the different strategies of writing according to the type of the dish that writes.Writing condition may change according to the disk drive that uses with CD, and this may cause incompatible between optical record medium and the disk drive.Specifically, need to increase writing speed to satisfy the demand of wanting having the user who carries out the snap information record on the CD of high storage capacity.

High-resolution optical recording apparatus such as Blu-ray disc of future generation (BD) register uses run length limited code (RLL) (1,7) coding method to come executive logging, and in RLL (1,7) coding method, the minimum value of the period of time T of time clock equals 2T.When using RLL (1,7) coding method, the laser output waveform that is used to form the record mark of predetermined length is made up of multiple-pulse, and wherein, the quantity of write pulse increases according to the length of record mark usually.As shown in Figure 1A and Figure 1B, if the length of record mark equals the N integral multiple of period of time T, then the laser output waveform is used by what N-1 write pulse formed and is write strategy.

When making in this way, be difficult to toggle lights (that is laser diode) so that form multiple-pulse with high power speed.In addition, because executive logging apace, so use multiple-pulse to be no advantage.In addition, when from laser diode adstante febre apace, be not easy enough heat is sent to optical record medium.Therefore, correctly do not form record mark.In order to address these problems, need a kind of strategy of writing that uses new pulse.

Figure 1A and Figure 1B illustrate the oscillogram of using traditional multiple-pulse to write the traditional record waveform of strategy.Figure 1A illustrates the oscillogram of traditional record waveform, and Figure 1B illustrates traditional multiple-pulse and writes strategy.With reference to Figure 1A and Figure 1B, use the traditional record waveform of multiple-pulse recording geometry to be used to write down anti-phase non-return-to-zero (NRZI) data.Here, T represents reference record and/or the cycle of reproducing clock signal.According to the method at record mark edge, record mark when the NRZI data are high level, and form blank during for low level when the NRZI data.The wave recording that is used for record mark is called as recording geometry.The wave recording that is used to form blank (that is, being used to wipe mark) is called as wipes figure.In the traditional record waveform, use multiple-pulse to form recording geometry, and the power level (power level) of regulating each pulse make it have one of following three kinds of level: Pw, Pe and Pb.Specifically, the record multiple-pulse that is used to form the recording geometry of mark has power level Pw and Pb, has power level Pe and be used to form blank wave recording.Use low level NRZI data to form the blank power level Pe that wipes figure and be retained as predetermined direct current (DC) level.Here, Pw represents to write power level, and Pb represents bias power level, and Pe represents erasing power level.

With reference to Figure 1B, write the example of strategy as traditional multiple-pulse Write strategy with N-1.The laser output waveform that is used to form the record mark of predetermined length is made up of multiple-pulse, and wherein, the quantity of write pulse increases according to the length of record mark usually.If the length of record mark is the N integral multiple (for example, 2T, 3T etc.) of period of time T, then the laser output waveform has N-1 write pulse.For example, in order to write down the record mark of 5T, the laser output waveform has 4 write pulses (5-1=4).

Following table 1 shows the condition of using the multiple-pulse type to write the recording method of strategy.

Optical maser wavelength	405nm
		Numerical aperture	0.85
The user data transmission rate	35.965 (Mbit/s) x4 is doubly fast
		Recording rate	4.92 (m/s) x4 is doubly fast
User data capacity	The 25G byte
		Track space	0.32μm

Following table 2 shows by comparing the result who obtains to using the traditional multiple-pulse shown in Figure 1A and Figure 1B to write tactful recording quality (being also referred to as " shake ") with the various times of fast records of carrying out.

Shake under 1x times of speed recording	5.6％
		Shake under 2x times of speed recording	6.4％
Shake under 4x times of speed recording	10.0％

With reference to top table 2, when 4x doubly speed (about 10, the rotating speed of 000RPM) when using traditional N-1 to write the strategy execution record down, compare with shake or 2x times of speed recording shake down 1x times of speed recording under, the shake increase is a lot.

Fig. 2 A, Fig. 2 B and Fig. 2 C show and use traditional multiple-pulse type to write strategy to be formed on the analog result that can write down the record mark in the Blu-ray disc (BD-R) during 4x times of speed recording handled.Specifically, Fig. 2 A illustrates and is used for the data that length is the record mark of 5T; Fig. 2 B illustrates traditional multiple-pulse and writes strategy; Fig. 2 C illustrates the analog result of using the traditional multiple-pulse type shown in Fig. 2 B to write the record mark of strategy.Shown in the record mark that forms in the analog result of Fig. 2 C irregularly shaped, under high speed, the heat that transmits in response to write pulse does not form record mark effectively.Because it is irregularly shaped that the analog result of the record mark shown in Fig. 2 C has, so be difficult to by using the traditional multiple-pulse type shown in Fig. 2 B to write the length that strategy forms record mark best or regulates record mark.

Fig. 3 A and Fig. 3 B illustrate the oscillogram of the conventional write strategy with box type (box type) recording geometry that uses a pulse.Fig. 3 A illustrates the oscillogram of traditional record waveform, and Fig. 3 B illustrates traditional box type recording geometry.With reference to Fig. 3 A and Fig. 3 B, regardless of the length of record mark, the laser output waveform that is used to form the record mark of predetermined length only is made up of a pulse.Period of time T is determined by the length of each pulse.

Following table 3 shows the condition of using the traditional box type shown in Fig. 3 A and Fig. 3 B to write the recording method of strategy.

Optical maser wavelength	405nm
		Numerical aperture	0.85

The user data transmission rate	35.965 (Mbit/s) x4 is doubly fast
		Recording rate	4.92 (m/s) x4 is doubly fast
User data capacity	The 25G byte
		Track space	0.32μm

Following table 4 shows the result who uses traditional box type to write the recording quality (" shake ") of strategy under 4x times of speed recording.

Shake under 4x times of speed recording

6.8％

Fig. 4 A, Fig. 4 B and Fig. 4 C show and use the traditional box type shown in Fig. 3 A and Fig. 3 B to write strategy is formed on the record mark among the BD-R during 4x times of speed recording handled analog result.

With 4x doubly traditional box type of writing down of speed (about 10, the rotating speed of 000RPM) write strategy and be used to solve traditional multiple-pulse type and write the problem that strategy is caused.Fig. 4 A illustrates and is used for the data that length is the record mark of 5T; Fig. 4 B illustrates traditional box type and writes strategy; Fig. 4 C illustrates the analog result of using the traditional box type shown in Fig. 4 B to write the record mark of strategy.Shown in Fig. 4 C, to write strategy with traditional multiple-pulse type and compare, traditional box type is write strategy and is reduced shake.

Shown in the analog result of Fig. 4 C, record mark has relative uniform shape.This shows that enough heat is transmitted so that form record mark.Yet different with the analog result shown in Fig. 2 C, in the analog result shown in Fig. 4 C, the afterbody of record mark is greater than the head of record mark.This is that the heat accumulation that the box type is write the afterbody place of record mark in the strategy increases because of the heat accumulation of the afterbody place accumulation of writing record mark in the strategy with respect to the multiple-pulse type.Therefore, be difficult to regulate the formation of marker edge of the afterbody of record mark.

In above-mentioned two kinds of methods,, during the rotating speed executive logging of 000RPM, be difficult to switched laser diode to realize as presently used traditional multiple-pulse type is write strategy when about 10 to be equal to or greater than.In addition, because the heat that time per unit sends recording medium to seldom, carry out the formation that high-speed record is not suitable for record mark so use traditional multiple-pulse type to write strategy.Therefore, can change into and use traditional box type to write strategy to carry out record, so that aspect switched laser diode, use the pulse structure with easier acquisition, time per unit can transmit more heat.As a result, compare with the shake of writing the strategy generation by traditional multiple-pulse type, traditional box type is write strategy and has been reduced shake.

Yet the analog result shown in Fig. 4 C demonstrates the head of the afterbody of record mark greater than record mark.The width of this record mark changes owing to heat accumulation produces.Therefore, for the high power speed recording, need optimal write strategy.

Summary of the invention

Each side of the present invention provides a kind of and can be in high power speed recording medium improves recording unit, recording method and the optical record medium of the quality of reproducing signal by the afterbody of aignment mark easily.

Other aspect of the present invention and/or advantage will partly be set forth in the following description, and part in addition will become obviously according to describing, and perhaps can understand by implementing the present invention.

According to an aspect of the present invention, a kind of data are recorded in method in the optical record medium, comprise: produce the box type recording geometry that comprises first pulse and second pulse, first pulse has the duration of determining according to the length of record mark and has first power level, and second pulse has second power level that is different from first power level; According to box type recording geometry record data.

According to an aspect of the present invention, second pulse is positioned at the marginal portion of box type recording geometry, so that regulate the marginal portion of record mark.

According to an aspect of the present invention, when record mark had the length of nT, second pulse started from time point (n-1) T place.

According to an aspect of the present invention, the length that has nT when record mark, and when n is integer, first pulse of box type recording geometry starts from the primary importance or the second place, described primary importance is separated first distance with the time point that apart from the starting point that forms record mark is 1T, and the described second place is separated second distance with the starting point that forms record mark.

According to an aspect of the present invention, and then first pulse produces second pulse, based on the length of determining box type recording geometry from the starting point of first pulse to the length of the end point of second pulse.

According to an aspect of the present invention, and then first pulse produces second pulse, determines the length of box type recording geometry based on the total duration of first pulse and second pulse.

According to an aspect of the present invention, and then first pulse produces second pulse, by determine the duration of first pulse to the distance of the starting point of second pulse from the starting point of first pulse, second pulse is positioned at the second place, and the end point of the described second place and record mark is separated second distance.

According to an aspect of the present invention, the step that produces recording geometry comprises: read the parameter information of box type recording geometry from optical record medium, and produce box type recording geometry according to the parameter information that reads.

According to a further aspect in the invention, a kind of method that will be recorded in about the information of recording geometry in the optical record medium comprises: produce the information about recording geometry; The information about recording geometry that produces is recorded in the presumptive area of optical record medium, wherein, comprise parameter information about the information of recording geometry about box type recording geometry, described box type recording geometry comprises first pulse and second pulse, first pulse has the duration of determining according to the length of record mark and has first power level, and second pulse has second power level that is different from first power level.

According to a further aspect in the invention, comprise about the parameter information of box type recording geometry: the starting point of first pulse, be positioned at primary importance, the starting point that this primary importance and distance form record mark is that the time point of 1T is separated first distance; The length of box type recording geometry determines that to the length of the end point of second pulse wherein, record mark has the length of nT, and n is an integer by the starting point from first pulse.

According to a further aspect in the invention, comprise about the parameter information of box type recording geometry: the starting point of first pulse, be positioned at primary importance, this primary importance is separated first distance with the starting point that forms record mark; The length of box type recording geometry is determined to the length of the end point of second pulse by the starting point from first pulse.

According to a further aspect in the invention, comprise about the parameter information of box type recording geometry: the starting point of first pulse, be positioned at primary importance, the starting point that this primary importance and distance form record mark is that the time point of 1T is separated first distance; The duration of first pulse, determine to the distance of the starting point of second pulse by starting point from first pulse; The end point of second pulse is positioned at the second place, and the end point of this second place and first pulse is separated second distance, and wherein, record mark has the length of nT, and n is an integer.

According to a further aspect in the invention, comprise about the parameter information of box type recording geometry: the starting point of first pulse, be positioned at primary importance, this primary importance is separated first distance with the time point that forms record mark; The duration of first pulse, determine to the distance of the starting point of second pulse by starting point from first pulse; The end point of second pulse is positioned at the second place, and the end point of this second place and first pulse is separated second distance.

According to a further aspect in the invention, comprise about the parameter information of box type recording geometry: the starting point of first pulse, be positioned at primary importance, the starting point that this primary importance and distance form record mark is that the time point of 1T is separated first distance; The duration of first pulse, determine to the distance of the starting point of second pulse by starting point from first pulse; The end point of second pulse is positioned at the second place, and the end point of this second place and record mark is separated second distance, and wherein, record mark has the length of nT, and n is an integer.

According to a further aspect in the invention, comprise about the parameter information of box type recording geometry: the starting point of first pulse, be positioned at primary importance, this primary importance is separated first distance with the time point that forms record mark; The duration of first pulse, determine to the distance of the starting point of second pulse by starting point from first pulse; The end point of second pulse is positioned at the second place, and the end point of this second place and record mark is separated second distance.

According to a further aspect in the invention, the parameter information about box type recording geometry also comprises: separate the end point of the cooling pulse of preset distance with the end point of record mark.

According to a further aspect in the invention, a kind of data are recorded in equipment on the optical record medium as record mark, comprise: the wave recording generator, generation comprises the box type recording geometry of first pulse and second pulse, first pulse has the duration of determining according to the length of record mark and has first power level, and second pulse has second power level that is different from first power level; Pickup unit carries out record according to box type recording geometry to record mark.

According to a further aspect in the invention, a kind of parameter information is recorded in equipment in the optical record medium, comprise: controller, generation is about the parameter information of box type recording geometry, described box type recording geometry comprises first pulse and second pulse, first pulse has the duration of determining according to the length of record mark and has first power level, and second pulse has second power level that is different from first power level; Pickup unit is recorded in the information about recording geometry that produces in the zone of optical record medium.

According to a further aspect in the invention, a kind ofly be used to write down and/or the optical record medium of reproducer, comprise: record is about the zone of the parameter information of recording geometry, wherein, comprise parameter information about the parameter information of recording geometry about box type recording geometry, described box type recording geometry comprises first pulse and second pulse, first pulse has the duration of determining according to the length of record mark and has first power level, second pulse has second power level that is different from first power level, described parameter information is used to compensate the heat accumulation that produces during writing down, change with the width that prevents record mark in recording geometry.

Except above-mentioned exemplary embodiment and aspect, other aspects and embodiment will be by the description below accompanying drawing and research obviously.

Description of drawings

By below in conjunction with the description of accompanying drawing to exemplary embodiment and claim, better understanding of the present invention will become clear, and it forms a disclosed part of the present invention.Although following write and shown in disclose to concentrate on and disclose exemplary embodiment of the present invention, should be expressly understood very that this only is schematic and exemplary, the invention is not restricted to this.The spirit and scope of the present invention only are defined by the claims.Be brief description of the drawings below, wherein:

Figure 1A illustrates the oscillogram of traditional record waveform;

Figure 1B illustrates traditional multiple-pulse recording geometry;

Fig. 2 A illustrates the record mark that length is 5T;

Fig. 2 B illustrates the example of the multiple-pulse recording geometry that is used to form the record mark shown in Fig. 2 A;

Fig. 2 C illustrates the analog result of the record mark of the multiple-pulse recording geometry formation of using shown in Fig. 2 B;

Fig. 3 A illustrates the oscillogram of traditional record waveform;

Fig. 3 B illustrates traditional monopulse recording geometry;

Fig. 4 A illustrates the record mark that length is 5T;

Fig. 4 B illustrates the example of the monopulse recording geometry that is used to form the record mark shown in Fig. 4 A;

Fig. 4 C illustrates the analog result of the record mark of the monopulse recording geometry formation of using shown in Fig. 4 B;

Fig. 5 is the block diagram according to the recording unit of the embodiment of the invention;

Fig. 6 is the block diagram of recording unit according to another embodiment of the present invention;

Fig. 7 A illustrates the record mark that length is 5T;

Fig. 7 B illustrates the box type recording geometry that the length shown in the record diagram 7A is the mark of 5T that is used for according to the embodiment of the invention;

Fig. 7 C illustrates the record mark that forms according to the box type recording geometry shown in use Fig. 7 B of the embodiment of the invention;

Fig. 8 A illustrates the oscillogram of wave recording;

Fig. 8 B illustrates first example according to the box type recording geometry of the embodiment of the invention;

Fig. 9 A illustrates the oscillogram of wave recording;

Fig. 9 B illustrates second example according to the box type recording geometry of the embodiment of the invention;

Figure 10 A illustrates the oscillogram of wave recording;

Figure 10 B illustrates the 3rd example according to the box type recording geometry of the embodiment of the invention;

Figure 11 A illustrates the oscillogram of wave recording;

Figure 11 B illustrates the 4th example according to the box type recording geometry of the embodiment of the invention;

Figure 12 A illustrates the oscillogram of wave recording;

Figure 12 B illustrates the 5th example according to the box type recording geometry of the embodiment of the invention;

Figure 13 A illustrates the oscillogram of wave recording;

Figure 13 B illustrates the 6th example according to the box type recording geometry of the embodiment of the invention;

Figure 14 is the process flow diagram according to the data record method of the embodiment of the invention;

Figure 15 is the process flow diagram according to the reference record method of the embodiment of the invention;

Figure 16 is the process flow diagram in the method for using this parameter after information storage medium reads parameter according to the embodiment of the invention.

Embodiment

Now, will be in detail with reference to the embodiment of the invention, its example is illustrated in the accompanying drawing, and in the accompanying drawings, identical label is represented identical parts all the time.Below, embodiment is described with reference to the accompanying drawings to explain the present invention.

Fig. 5 is the block diagram according to the recording unit 1 of the embodiment of the invention.With reference to Fig. 5, recording unit 1 comes record data by formation mark or blank in optical record medium 100.Recording unit 1 comprises pickup unit 10, wave recording generator 20 and channel modulator 30.

Channel modulator 30 is a channel bit-stream according to the data-modulated of the outside being imported such as the predetermined modulation algorithm of RLL (1,7) modulation technique.

Wave recording generator 20 is from channel modulator 30 receive channel bit streams, to produce the wave recording that is used to write channel bit-stream according to the information about recording geometry.This wave recording comprises box type (box type) recording geometry of being made up of first pulse and second pulse, and first pulse has first power level, and second pulse has the power level lower than first power level.After a while this wave recording will be described in more detail.

Pickup unit 10 light shines on the optical record medium 100 according to the wave recording that produces, so that form mark or blank.Pickup unit 10 comprises: the motor (not shown) makes optical record medium 100 rotations; The optical head (not shown), the laser radiation of self-excitation light source (not shown) in the future is to optical record medium 100, or reception is from optical record medium 100 laser light reflected; The servo circuit (not shown) carries out servocontrol to motor and optical head; The drive circuit for laser (not shown), drive installation is at the laser instrument at servo circuit and optical head place.

Recording unit 1 can use fc-specific test FC data (random data or tentation data) to carry out on the test zone of optical record medium 100 and write test and wipe test according to the parameter information of box type recording geometry.After execution was write test and wiped test, recording unit 1 can be selected top condition (for example, minimum jitter value, ultimate resolution, maximum modulation) according to test result from test condition.Then, selected condition can be applied to wave recording generator 20.

Fig. 6 is the block diagram of recording unit 2 according to another embodiment of the present invention.With reference to Fig. 6, recording unit 2 comes record data by formation mark or blank on optical record medium 100.Recording unit 2 comprises pickup unit 10, wave recording generator 20, channel modulator 30, signal processor 40 and controller 50.

Wave recording generator 20 is used to write the wave recording of channel bit-stream from channel modulator 30 receive channel bit streams with generation.Pickup unit 10 light shines on the optical record medium 100 according to the wave recording that produces, so that form mark or blank.

More particularly, channel modulator 30 is a channel bit-stream with the data-modulated of input, thereby exports anti-phase non-return-to-zero (NRZI) data.Wave recording generator 20 produces the wave recording that is used to write the NRZI data, and the waveform that produces is offered the drive circuit for laser (not shown) that is included in the pickup unit 10.Be appreciated that to the invention is not restricted to use the NRZI data, can change the data of using other types into, as non-return-to-zero (NRZ) data.

Drive circuit for laser (not shown) receiving record waveform is with control lasing light emitter (not shown), thereby so that laser radiation is formed mark or blank to optical record medium 100.

Specifically, pickup unit 10 reads the information about recording geometry from the specific region of optical record medium 100.40 pairs of signal processors are about the information and executing signal Processing of the recording geometry that reads, and the result of signal Processing is sent to controller 50.Controller 50 will send to wave recording generator 20 about the information of recording geometry.The information about recording geometry that wave recording generator 20 receives according to slave controller 50 produces the wave recording that is used to write from the channel data of channel modulator 30 receptions.The information about recording geometry that reads from optical record medium 100 comprises the parameter information that is used to produce the box type recording geometry of being made up of first pulse and second pulse, first pulse has first power level, and second pulse has the power level lower than first power level.Use description to produce the parameter information of box type recording geometry after a while.

Fig. 7 A, Fig. 7 B and Fig. 7 C illustrate according to the box type recording geometry of the embodiment of the invention and the mark that uses this box type recording geometry to form.Fig. 7 A illustrates and is used for the NRZI data that length is the mark of 5T.Fig. 7 B illustrates and is used for the box type recording geometry that length shown in the record diagram 7A is the mark of 5T.Fig. 7 C illustrates the shape of using the box type recording geometry shown in Fig. 7 B to be formed on the mark in the information storage medium.

With reference to Fig. 7 A, the NRZI data that are used for length and are the mark of 5T have the rising edge at starting point 90 places and the negative edge at end point 95 places.Being used for length is after the NRZI data of the mark of 5T begin, the time point that apart from starting point is 1T is by label 91 indications, the time point that apart from starting point is 2T is by label 92 indications, the time point that apart from starting point is 3T is by label 93 indications, the time point that apart from starting point is 4T is by label 94 indications, and the time point that apart from starting point is 5T is by label 95 indications.Yet, be not limited to such mark lengths.

With reference to Fig. 7 B, box type recording geometry comprises: first pulse 70 has the first power level Pw1; With second pulse 80, has the second power level Pw2 that is different from first power level.Preferably, the second power level Pw2 is lower than the first power level Pw1.Yet the second power level Pw2 is not limited to lower than the first power level Pw1.In addition, can be based on adjust the first power level Pw1 and the second power level Pw2 such as the record condition of heat accumulation amount.In addition, can use more than two power levels to reduce the heat accumulation effect.

Determine the duration of first pulse 70 according to mark lengths.Second pulse 80 is positioned at the afterbody of box type recording geometry.For example, when mark lengths was nT, the starting point of second pulse 80 can be positioned at time point (n-1) T place.With reference to Fig. 7 B, mark lengths equals 5T, because (n-1) T=(5-1) T=4T, so the starting point of second pulse 80 equals time point 94.Yet the starting point of second pulse is not limited to position (n-1) T.

The parameter of box type recording geometry can have various forms.For example, described parameter can comprise total duration 73, the end point 81 of second pulse 80 and the end point of cooling pulse 110 of duration 82, first pulse 70 and second pulse 80 of duration 72, second pulse 80 of starting point 71, first pulse 70 of first pulse 70.The starting point 71 of first pulse 70 can be by determining with the distance of the starting point 90 of mark.Alternatively, starting point 71 can be by determining that with the distance of time point 91 time point 91 distances are used to form the starting point 1T of the NRZI data of mark.In addition, starting point 71 can be by determining with the distance of other each time points (as 92,93 etc.).In addition, the end point 81 of second pulse 80 can be by determining with the distance of (n-1) T.Alternatively, end point 81 can be by determining with the distance of the end point 95 of mark.In addition, end point 81 can be by determining with the distance of other each time points (as 92,93 etc.).

Now, describe in detail with reference to Fig. 8 A, Fig. 8 B, Fig. 9 A, Fig. 9 B, Figure 10 A, Figure 10 B, Figure 11 A, Figure 11 B, Figure 12 A, Figure 12 B, Figure 13 A and Figure 13 B and have various forms of parameters.When using the box type recording geometry that comprises two pulses (having first and second power levels) shown in Fig. 7 B to be recorded in data on the optical record medium, can obtain the mark shown in Fig. 7 C with regular shape and even width.

Following table 5 illustrates the result who uses the box type shown in Fig. 7 B to write the quality (be also referred to as " shake ") of strategy under 4x times of speed recording.Record condition is with identical with reference to the described record condition of Fig. 3.Compare with the shake that produces by the conventional write strategy, use the box type shown in Fig. 7 B to write strategy and reduced amount of jitter.

Shake under 4x times of speed recording

6.2％

The example of the parameter of the box type recording geometry of each side according to the present invention is described with reference to Fig. 8 A, Fig. 8 B, Fig. 9 A, Fig. 9 B, Figure 10 A, Figure 10 B, Figure 11 A, Figure 11 B, Figure 12 A, Figure 12 B, Figure 13 A and Figure 13 B now.In the recording unit of each side, use the parameter of box type recording geometry to produce the wave recording that is used for record data according to the present invention.In addition, the each side according to the present invention, the parameter information of box type recording geometry is recorded in the specific region of information storage medium, the parameter information that is recorded in the box type recording geometry in the specific region of information storage medium is read, so that produce the wave recording that is used for record data based on this parameter information.The parameter information of box type recording geometry can change according to various record conditions (for example writing speed, recording layer position and recording layer material).

Fig. 8 A and Fig. 8 B illustrate first example according to the parameter of the box type recording geometry of the embodiment of the invention.Fig. 8 A illustrates the oscillogram of wave recording, and Fig. 8 B illustrates first example of box type recording geometry.With reference to Fig. 8 B, this box type recording geometry comprises: first pulse 70 has the first power level Pw1; With second pulse 80, have the second power level Pw2 lower than the first power level Pw1.First example of the parameter of box type recording geometry comprises the starting point dP of first pulse 70, the duration P of box type recording geometry and the end point dS of cooling pulse 110.

The starting point that forms record data from distance according to the starting point dP of first pulse 70 of the box type recording geometry of the example shown in Fig. 8 A and Fig. 8 B is that the time point of 1T begins to measure.The duration P of box type recording geometry represents the total duration from the starting point dP of first pulse 70 to the write pulse of the end point EP of second pulse 80.End point dS is the end point from the cooling pulse 110 of the end point measurement of record data.

Fig. 9 A and Fig. 9 B illustrate second example according to the parameter of the box type recording geometry of the embodiment of the invention.Fig. 9 A illustrates the oscillogram of wave recording, and Fig. 9 B illustrates second example of box type recording geometry.With reference to Fig. 9 B, this box type recording geometry comprises:: first pulse 70 has the first power level Pw1; With second pulse 80, have the second power level Pw2 lower than the first power level Pw1.Second example of the parameter of box type recording geometry comprises the starting point dP of first pulse 70, the duration P of box type recording geometry and the end point dS of cooling pulse 110.

Starting point dP according to first pulse 70 of the box type recording geometry of the example shown in Fig. 9 A and Fig. 9 B begins to measure from mark starting point MSP.The duration P of box type recording geometry represents the total duration from the starting point dP of first pulse 70 to the write pulse of the end point EP of second pulse 80.End point dS is the end point from the cooling pulse 110 of the end point measurement of record data.

Figure 10 A and Figure 10 B illustrate the 3rd example according to the parameter of the box type recording geometry of the embodiment of the invention.Figure 10 A illustrates the oscillogram of wave recording, and Figure 10 B illustrates the 3rd example of box type recording geometry.With reference to Figure 10 B, this box type recording geometry comprises: first pulse 70 has the first power level Pw1; With second pulse 80, have the second power level Pw2 lower than the first power level Pw1.The 3rd example of the parameter of box type recording geometry comprises starting point dP, the duration P of first pulse 70, the end point L of second pulse 80 and the end point dS of cooling pulse 110 of first pulse 70.

The starting point that forms record data from distance according to the starting point dP of first pulse 70 of the box type recording geometry of the example shown in Figure 10 A and Figure 10 B is that the time point of 1T begins to measure.The duration P of first pulse 70 represents the length from the starting point dP of first pulse 70 to the starting point of second pulse 80.The end point L of second pulse 80 measures since the first end-of-pulsing point FEP.End point dS is the end point from the cooling pulse 110 of the end point measurement of record data.

Figure 11 A and Figure 11 B illustrate the 4th example according to the parameter of the box type recording geometry of the embodiment of the invention.Figure 11 A illustrates the oscillogram of wave recording, and Figure 11 B illustrates the 4th example of box type recording geometry.With reference to Figure 11 B, this box type recording geometry comprises: first pulse 70 has the first power level Pw1; With second pulse 80, have the second power level Pw2 lower than the first power level Pw1.The 4th example of the parameter of box type recording geometry comprises starting point dP, the duration P of first pulse 70, the end point L of second pulse 80 and the end point dS of cooling pulse 110 of first pulse 70.

Starting point dP according to first pulse 70 of the box type recording geometry of the example shown in Figure 11 A and Figure 11 B begins to measure from mark starting point MSP.The duration P of first pulse 70 represents the length from the starting point dP of first pulse 70 to the starting point of second pulse 80.The end point L of second pulse 80 measures since the first end-of-pulsing point FEP.End point dS is the end point from the cooling pulse 110 of the end point measurement of record data.

Figure 12 A and Figure 12 B illustrate the 5th example according to the parameter of the box type recording geometry of the embodiment of the invention.Figure 12 A illustrates the oscillogram of wave recording, and Figure 12 B illustrates the 5th example of box type recording geometry.With reference to Figure 12 B, this box type recording geometry comprises: first pulse 70 has the first power level Pw1; With second pulse 80, have the second power level Pw2 lower than the first power level Pw1.The 5th example of the parameter of box type recording geometry comprises starting point dP, the duration P of first pulse 70, the end point dL of second pulse 80 and the end point dS of cooling pulse 110 of first pulse 70.

The starting point that forms record data from distance according to the starting point dP of first pulse 70 of the box type recording geometry of the example shown in Figure 12 A and Figure 12 B is that the time point of 1T begins to measure.The duration P of first pulse 70 represents the length from the starting point dP of first pulse 70 to the starting point of second pulse 80.The end point dL of second pulse 80 begins to measure from mark end point MEP.End point dS is the end point from the cooling pulse 110 of the end point measurement of record data.

Figure 13 A and Figure 13 B illustrate the 6th example according to the parameter of the box type recording geometry of the embodiment of the invention.Figure 13 A illustrates the oscillogram of wave recording, and Figure 13 B illustrates the 6th example of box type recording geometry.With reference to Figure 13 B, this box type recording geometry comprises: first pulse 70 has the first power level Pw1; With second pulse 80, have the second power level Pw2 lower than the first power level Pw1.The 6th example of the parameter of box type recording geometry comprises starting point dP, the duration P of first pulse 70, the end point dL of second pulse 80 and the end point dS of cooling pulse 110 of first pulse 70.

The starting point dP of first pulse 70 of box type recording geometry begins to measure from mark starting point MSP.The duration P of first pulse 70 represents the length from the starting point dP of first pulse 70 to the starting point of second pulse 80.The end point dL of second pulse 80 begins to measure from mark end point MEP.End point dS is the end point from the cooling pulse 110 of the end point measurement of record data.

Figure 14 is the process flow diagram according to the data record method of the embodiment of the invention.

At first, in square frame 141, produce anti-phase non-return-to-zero (NRZI) data.

Next, in square frame 142, produce wave recording, this wave recording has the box type recording geometry of being made up of first pulse and second pulse, wherein, first pulse has first power level and has duration corresponding to the length of record mark, and second pulse has second power level that is different from first power level.Preferably, second power level is lower than first power level.

Next, in square frame 143, when using the wave recording that in square frame 142, produces to form mark or blank, record NRZI data.

Figure 15 is the process flow diagram according to the reference record method of the embodiment of the invention.

With reference to Figure 15, in square frame 151, determine the parameter of the box type recording geometry formed by first pulse and second pulse, wherein, first pulse has first power level and has duration corresponding to the length of record mark, and second pulse has second power level that is different from first power level.Preferably, second power level is lower than first power level.

Next, in square frame 152, the parameter of determining in square frame 151 is stored in the information storage medium.

With reference to Figure 16, in square frame 161, read parameter information from information storage medium, wherein, described parameter information is and the relevant information of being made up of first pulse and second pulse of box type recording geometry, described first pulse has first power level and has duration corresponding to the length of record mark, and second pulse has second power level that is different from first power level.Preferably, second power level is lower than first power level.

Next, in square frame 162, use the parameter information in square frame 161, read to determine record condition, and based on definite record condition with data storage in information storage medium.

According to each side of the present invention, in high power speed recording medium, the afterbody of aignment mark easily, thus improve the quality of reproducing signal.

Each side of the present invention also can be implemented as the computer-readable code on the computer readable recording medium storing program for performing.Computer readable recording medium storing program for performing be can store can be subsequently by any data storage device of the data of computer system reads.The example of computer readable recording medium storing program for performing comprises: ROM (read-only memory) (ROM), random-access memory (ram), CD-ROM, tape, floppy disk, optical data storage device and be contained in computer data signal (as the data transmission by the internet) in the carrier wave that comprises pressure source code segment and encrypted source code section.Computer readable recording medium storing program for performing can also be distributed on the computer system of networking, thereby computer-readable code is with distributed way storage and execution.In addition, realize that functional programs, code and the code segment of each side of the present invention can be easily explained by the programmer of the technical field of the invention.

Although illustrated and described the example of the embodiment of the invention, but, it should be appreciated by those skilled in the art that under the situation that does not break away from true scope of the present invention along with development of technology, can carry out various changes and modification, and can be equal to replacement its parts.Without departing from the scope of the invention, can carry out many modifications, displacement, interpolation and sub-portfolio, so that instruction of the present invention is adapted to particular case.For example, in Fig. 8 B, box type recording geometry is not limited to have first pulse 70 and second pulse 80, has a succession of pulse and can change into, and each of these pulses is corresponding to different power levels.In addition, Fig. 8 A, Fig. 8 B, Fig. 9 A, Fig. 9 B, Figure 10 A, Figure 10 B, Figure 11 A, Figure 11 B, Figure 12 A, Figure 12 B, Figure 13 A and Figure 13 B do not need to have first pulse and second pulse, have individual pulse (having adjustable power level) and can change into, perhaps can have more than two pulses.Therefore, should be appreciated that, the invention is not restricted to disclosed various exemplary embodiment, the present invention includes all embodiment in the scope that falls into claim.

Claims

1. method that will the data corresponding be recorded in the optical record medium with the data markers of the Channel Modulation of length nT, this method comprises:

Produce the box type recording geometry that comprises first pulse and second pulse based on information about box type recording geometry, first pulse has the duration of determining according to the length nT of mark and has first power level, and second pulse has second power level that is different from first power level;

According to box type recording geometry data are recorded on the optical record medium,

Wherein, the information about box type recording geometry comprises:

Information about duration of first pulse;

Information about the starting point of first pulse determined from 1T point distance;

Information about the end point of second pulse determined from (n-1) T point distance; With

Information about the end point of the cooling pulse determined from nT point distance;

Wherein, T is the time cycle of clock period, and n is the integer greater than 1.

2. the method for claim 1, wherein second power level is lower than first power level.

3. the method for claim 1, wherein first pulse and second pulse sequence are arranged.

4. the method for claim 1, wherein also comprise about the information of first power level with about the information of second power level about the information of box type recording geometry.

The method of claim 1, wherein and then first pulse produce second pulse, based on the length of determining box type recording geometry from the starting point of first pulse to the length of the end point of second pulse.

The method of claim 1, wherein and then first pulse produce second pulse, determine the length of box type recording geometry based on the total duration of first pulse and second pulse.

7. the method for claim 1, wherein, and then first pulse produces second pulse, by determine the duration of first pulse to the distance of the starting point of second pulse from the starting point of first pulse, second end-of-pulsing is in the second place, and the end point of the described second place and record mark is separated second distance.