Method for accurately carrying out high-resolution recording on high-density track

Abstract

The invention discloses a method for accurately carrying out high-resolution recording on a high-density track. The method comprises the following steps: S11, acquiring to-be-recorded data in a multi-system form; s12, extracting to obtain a plurality of combined models; s13, recording a plurality of combination models on the optical disc to obtain first distortion data; s14, performing record compensation operation based on the first distortion data to obtain a plurality of mark corrections; s21, compensating each combined model by adopting a corresponding mark correction amount to obtain compensation data; and S22, recording the compensation data on the optical disc at high resolution based on a sectional laser control strategy. According to the method, the distortion data possibly appearing during actual recording are acquired in advance, and the record compensation operation is performed based on the distortion data to obtain the mark correction, so that in the official recording stage, when the corresponding combined model is recorded, the mark correction corresponding to the combined model is adopted to compensate the combined model; and the compensation data is recorded by adopting a sectional type laser control strategy, so that the problem of thermal interference between adjacent data bits is avoided, the consistency of the data output during playing and the actually recorded data is ensured, and the problem of distortion is avoided.

Description

Technical Field

[0001] The present invention relates to the field of optical storage technology, and in particular to a method for accurately performing high-resolution recording on a high-density track. Background Art

[0002] Traditional optical storage burning technology converts digital signals into analog signals, etches the surface of the optical disc with a laser beam, and uses the laser beam to etch tiny pits on the surface of the optical disc to record information. Since the data to be burned is usually converted into binary form, these pits represent "1" in the binary data, and the blank spaces represent "0".

[0003] In order to meet the technical development trends such as the expansion of storage capacity and storage density, high-resolution recording can be adopted in the prior art, that is, in the frame of the cell as the unit length of the recording unit (that is, one data bit), the amplitude of the data to be recorded of each data bit is adjusted with high precision to a degree that can be recorded with high resolution, thereby improving the data storage capacity by increasing the linear density, which is different from the previous binary recording method of only optimizing the length of the "1" data, and the "1" data is preceded and followed by "0" data; in high-resolution recording, the amplitude of the data to be recorded represents different recording information, and the data to be recorded is recorded continuously without gaps. When recording large-value data to be recorded, it may exceed its own data bit. At this time, there is no space between the data to be recorded. Therefore, after reaching a certain level, the data to be recorded will overlap and cannot be distinguished, resulting in ISI inter-symbol interference, resulting in a higher bit error rate during playback. Summary of the invention

[0004] The present invention provides a method for accurately recording high resolution on a high-density track, so as to overcome the technical problem of a high bit error rate during playback caused by the inter-symbol interference problem in high-resolution recording.

[0005] In order to achieve the above object, the technical solution of the present invention is:

[0006] A method for accurately recording high resolution on a high-density track, the specific steps comprising:

[0007] S1: Preparation before recording

[0008] S11: Acquire the data to be recorded in multi-base form;

[0009] S12: constructing a data extraction frame, taking the first data bit of the data to be recorded as the starting position of the data extraction frame, and moving the data extraction frame one data bit each time, thereby extracting a plurality of combination models;

[0010] S13: recording a plurality of combined models on an optical disc to obtain first distortion data;

[0011] S14: performing a recording compensation operation based on the first distortion data to obtain a number of mark correction amounts;

[0012] S2: Formal Recording Stage

[0013] S21: For each combined model, a corresponding marking correction amount is used to perform compensation to obtain compensation data;

[0014] S22: Recording the compensation data on the optical disc with high resolution based on a segmented laser control strategy.

[0015] Furthermore, in S14, the process of performing a recording compensation operation based on the first distortion data to obtain a plurality of mark correction amounts is as follows:

[0016] The first distorted data is processed by using a recording compensation operation of five inter-symbol interference to obtain a mark correction amount, including:

[0017] 1) inputting the first distorted data into a Volterra filter for convolution operation, and adjusting the first distorted data according to a signal adjustment strategy, and finally obtaining second distorted data;

[0018] The signal adjustment strategy is: obtaining a convolution signal output by a Volterra filter;

[0019] Record the amplitude difference between the convolution signal and each data bit of the combination model, and determine in turn whether each amplitude difference meets the set threshold value. If so, the first distorted data is the second distorted data. Otherwise, adjust the amplitude of each data bit in the first distorted data until the data bit of the convolution signal meets the above conditions.

[0020] 2) Establishing an Lv. correction amount data table, and calculating the deviation between the data bits corresponding to the first distorted data and the second distorted data, i.e., the Lv. correction amount, and storing the deviation in the Lv. correction amount data table in sequence according to the data bit sequence number;

[0021] 3) calculating the overlapping area between adjacent data in the first distorted data, and performing photoelectric conversion according to the overlapping area to obtain an overlapping recording signal of the data bit where the overlapping area is located, that is, an OLP recording signal;

[0022] 4) adding the Lv. correction amount in the Lv. correction amount data table to the overlapped recorded signal according to the data bit sequence number to obtain the actual level of each data bit;

[0023] 5) Calculating the amplitude difference between the actual level of each data bit and each data bit in the first distorted data to obtain the mark correction amount corresponding to each data bit.

[0024] Furthermore, in S21, the corresponding marking correction amount is used to compensate each combined model, and the process of obtaining compensation data is as follows:

[0025] The mark correction amount is superimposed on the to-be-recorded data whose data bit sequence number is the middle sequence number in the corresponding combination model, thereby obtaining the compensation data.

[0026] Furthermore, in the process of recording the compensation data on the optical disc with high resolution based on the segmented laser control strategy, the complete recording process of a data bit on the optical disc is divided into three stages, namely:

[0027] Warm-up phase, recording phase and cooling phase;

[0028] In the preheating stage, based on the compensation data and in accordance with the preheating strategy, a laser power value Ps and a laser pulse time Ts for increasing the temperature of the optical disc recording film are determined; and a preheating laser pulse operation is performed on the data bit in accordance with the determined Ps and Ts;

[0029] In the recording stage, the peak power Pw and the peak power pulse time Ttop for recording and the sustaining power Pm and the sustaining power pulse time Tm for recording are determined based on the compensation data and in accordance with the recording strategy; and the recording laser pulse operation is performed on the preheated data bits according to the determined Pw, Ttop, Pm and Tm, so as to realize high-resolution recording of the compensation data on the optical disc;

[0030] In the cooling stage, the minimum controllable power Pc and the cooling laser pulse time Tc for reducing the temperature of the optical disc recording film are set; and the cooling laser pulse operation is performed on the recorded data bits according to the set Pc and Tc.

[0031] Furthermore, the preheating strategy is:

[0032] Set a reference laser power value Ps' for increasing the temperature of the optical disk recording film;

[0033] Setting the laser pulse time Ts' for increasing the temperature of the optical disk recording film as a benchmark;

[0034] The recording resolution of the data to be recorded is set to N, and the gear n of the data to be recorded is determined according to the value of the compensation data;

[0035] Ps and Ts are divided into a total of N+1 gears. According to the gear n where the compensation data is located, the Ps of the nth gear is set to:

[0036] Ps=Ps'*(1+n*1%)

[0037] Set the Ts of the nth gear to:

[0038] Ts=Ts'*(1+n*1%).

[0039] Furthermore, the recording strategy is:

[0040] Set the recorded peak power Pw and peak power pulse time Ttop;

[0041] The recorded maintenance power Pm is set to:

[0042] Pm=W+Ps

[0043] Where W is the set fixed power, Ps is the laser power value that increases the temperature of the optical disc recording film;

[0044] The process of determining the pulse time Tm to maintain power is:

[0045] Set the pulse time Tm' of the reference maintenance power;

[0046] Divide Tm into a total of N+1 gears. According to the gear n where the compensation data is located, set Tm of the nth gear to:

[0047] Tm=Tm'*(1-n*1%).

[0048] Furthermore, in the cooling stage, the cooling laser pulse time Tc is set to:

[0049] Tc=T-Ts-Tw

[0050] Where T is the time interval between the terminal of the last data to be recorded and the terminal of the current data to be recorded, and Tw is the total time of the recording phase.

[0051] Beneficial effects: The present invention constructs a data extraction frame, takes the first data bit of the data to be recorded as the starting position of the data extraction frame, and moves the data extraction frame one data bit each time, so as to extract several combination models; and obtains in advance the distortion data that may appear in the actual recording of several combination models, and performs recording compensation operations based on the distortion data to obtain a mark correction amount, so that in the formal recording stage, when recording the corresponding combination model, the mark correction amount corresponding to the combination model is used to compensate it, and a segmented laser control strategy is used to record the compensated data, to ensure that there will be no thermal interference problem between adjacent data bits, and to ensure that the data output during playback is consistent with the actually recorded data, without distortion problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0053] Figure 1 A flow chart of a method for accurately performing high-resolution recording on a high-density track in the present invention;

[0054] Figure 2 Schematic diagram of high-resolution recording signal level in an embodiment of the present invention;

[0055] Figure 3 A schematic diagram of controlling the power of each data bit in sections according to an embodiment of the present invention;

[0056] Figure 4 Schematic diagram of high-resolution amplitude laser control strategy in an embodiment of the present invention;

[0057] Figure 5 A schematic diagram of the overlapping area of ​​adjacent data in an embodiment of the present invention;

[0058] Figure 6 Schematic diagram of interference recording compensation between adjacent data bits in an embodiment of the present invention. DETAILED DESCRIPTION

[0059] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0060] This embodiment provides a method for accurately recording high resolution on a high density track, such as Figure 1 As shown, the specific steps include:

[0061] S1: Preparation before recording

[0062] S11: Acquire the data to be recorded in multi-base form;

[0063] Specifically, in this embodiment, the multi-base data to be recorded does not include binary data. In the art, binary is usually expressed as binary only, so the multi-base form expressed here includes but is not limited to quinary, decimal, etc. Specifically, in this embodiment, the multi-base data to be recorded is quinary data.

[0064] S12: In order to be able to identify with high resolution during playback, it is necessary to identify the connection between the previous and next data to be recorded. Therefore, in this embodiment, a data extraction frame is constructed, the first data bit of the data to be recorded is used as the starting position of the data extraction frame, and the data extraction frame is moved one data bit each time, so as to extract a plurality of combination models;

[0065] Specifically, in this embodiment, the data extraction frame is constructed as a five-bit data extraction frame, so that five bits of data are extracted successively and sequentially, and interference is performed between five symbols. This can ensure that the thermal interference generated during recording is controlled within the recording compensation range. In practice, six bits of data can also be extracted, and the method proposed in the present invention can be adopted to avoid the thermal interference problem.

[0066] Specifically, if the end of the data to be recorded is extracted and is less than five bits, five bits are padded with 0s.

[0067] Specifically, in this embodiment, each combination model includes five data to be recorded, namely, the first two recording marks + the current recording mark + the last two recording marks. If the data to be recorded is 0, 1, 2, 3, 4, 1, 2, 3, 4…, it is divided into several combination models such as 0, 1, 2, 3, 4, 1, 2, 3, 4, 1, 2, 3, 4, 1, 2, 3, 4…

[0068] S13: recording a plurality of combined models on an optical disc to obtain first distortion data;

[0069] S14: performing a recording compensation operation based on the first distortion data to obtain a number of mark correction amounts;

[0070] In a specific embodiment, in S14, the process of performing a recording compensation operation based on the first distortion data to obtain a plurality of mark correction amounts is as follows:

[0071] The uncompensated distorted data is processed by using the five-symbol-interference recording compensation operation to obtain the mark correction amount, such as Figure 6 As shown, including:

[0072] 1) inputting the first distorted data into a Volterra filter for convolution operation, and adjusting the first distorted data according to a signal adjustment strategy, and finally obtaining second distorted data;

[0073] The signal adjustment strategy is: obtaining the convolution signal output by the Volterra filter; recording the amplitude difference between the convolution signal and each data bit of the combination model, and determining in turn whether each amplitude difference meets the set threshold value; if so, the first distorted data is the second distorted data; otherwise, the amplitude of each data bit in the first distorted data is adjusted in combination until the data bit of the convolution signal meets the aforementioned condition;

[0074] Specifically, in this embodiment, the combined adjustment assumes that the first adjustment is based on the first distorted signal, the first bit is adjusted by 0.1, the second bit is adjusted by 0.2, the third bit is adjusted by 0.3, the fourth bit is adjusted by 0.4, and the fifth bit is adjusted by 0.5. However, the convolution signal output after the second bit is adjusted still does not meet the threshold condition, then a second combined adjustment is performed on the basis of the original first distorted signal: the first bit uses the previous adjustment value of 0.1, the second bit is changed to 0.1, the third bit is adjusted by 0.3, the fourth bit is adjusted by 0.4, and the fifth bit is adjusted by 0.5.

[0075] Specifically, since the first distorted data is a square mark signal, there is nonlinear distortion. In this embodiment, a Volterra filter is used to convolve the square mark signal to make it close to the signal data in the input combination model.

[0076] 2) Establishing an Lv. correction amount data table, and calculating the deviation between the data bits corresponding to the first distorted data and the second distorted data, i.e., the Lv. correction amount, and storing the deviation in the Lv. correction amount data table in sequence according to the data bit sequence number;

[0077] 3) If Figure 5 As shown in the figure, T0, T1, T2, T3 and T4 are the periods of each data, and the period value is T. The overlapping area between adjacent data in the first distorted data is calculated, and after photoelectric conversion is performed according to the overlapping area, an overlapping recording signal of the data bit where the overlapping area is located is obtained, that is, an OLP recording signal;

[0078] Specifically, the area is the area etched by the laser on the optical disc, which corresponds to the brightness change of the laser reflected light, and can be converted into an electrical signal through photoelectric conversion.

[0079] 4) adding the Lv. correction amount in the Lv. correction amount data table to the overlapped recorded signal according to the data bit sequence number to obtain the actual level of each data bit;

[0080] 5) Calculating the amplitude difference between the actual level of each data bit and each data bit in the first distorted data to obtain the mark correction amount corresponding to each data bit.

[0081] Specifically, in the high-resolution recording process, there is no interval between the data to be recorded, that is, the recording marks, and after reaching a certain level, the symbols overlap and cannot be distinguished, resulting in the ISI inter-symbol interference phenomenon, which causes the data output during the final playback to be distorted. Therefore, in this embodiment, the data to be recorded is divided into several combination models in turn, and several combination models are recorded on the optical disc in advance to obtain the uncompensated distorted data corresponding to the several combination models, and then the uncompensated distorted data is subjected to ISI5 (Inter Symbol Interference 5) five-symbol interference recording compensation, and the mark correction amounts corresponding to the several combination models are obtained in advance and stored in the register. When the combination model is actually recorded, the mark correction amounts in the register are directly retrieved for different combination models to adjust them, so that the data output during playback is consistent with the actually recorded data, and there is no distortion problem.

[0082] S2: Formal Recording Stage

[0083] S21: For each combined model, a corresponding marking correction amount is used to perform compensation to obtain compensation data;

[0084] In a specific embodiment, in S21, the process of adjusting a plurality of combined models using corresponding marking correction amounts to obtain the adjusted data to be recorded is as follows:

[0085] Specifically, the mark correction amount is superimposed on the to-be-recorded data whose data bit sequence number is an intermediate sequence number in the corresponding combination model, thereby obtaining the compensation data.

[0086] S22: Recording the compensation data on the optical disc with high resolution based on the segmented laser control strategy, such as Figure 2 Specifically, in the process of recording compensation data on the optical disc with high resolution based on the segmented laser control strategy, the complete recording process of a data bit on the optical disc is as follows: Figure 3 and Figure 4 The three stages shown in the figure can control the amplitude of the data to be recorded with higher precision, namely:

[0087] Warm-up phase, recording phase and cooling phase;

[0088] In the preheating stage, based on the compensation data and in accordance with the preheating strategy, a laser power value Ps and a laser pulse time Ts for increasing the temperature of the optical disc recording film are determined; and a preheating laser pulse operation is performed on the data bit in accordance with the determined Ps and Ts;

[0089] Specifically, in the preheating stage,

[0090] The preheating strategy is:

[0091] Set a reference laser power value Ps' for increasing the temperature of the optical disk recording film;

[0092] Setting the laser pulse time Ts' for increasing the temperature of the optical disk recording film as a benchmark;

[0093] The recording resolution of the data to be recorded is set to N, and the gear n of the data to be recorded is determined according to the value of the compensation data;

[0094] Ps and Ts are divided into a total of N+1 gears. According to the gear n where the compensation data is located, the Ps of the nth gear is set to:

[0095] Ps=Ps'*(1+n*1%)

[0096] Set the Ts of the nth gear to:

[0097] Ts=Ts'*(1+n*1%).

[0098] Specifically, due to the high frequency recording, thermal interference will be generated between the previous and next recording pulses. In this embodiment, by setting a preheating stage, the temperature range of the optical disk recording film is increased in advance, thereby eliminating the influence of thermal interference.

[0099] Specifically, due to the presence of high-value data to be recorded, if the optical disk recording film is not preheated sufficiently, that is, the power is insufficient and the preheating time is insufficient, it is easy to cause the starting end of the high-value data to be recorded to be delayed. Therefore, this embodiment sets Ps and Ts in grades, that is, the corresponding power and time are given according to the grade where the value of the data to be recorded is located, so as to record the data.

[0100] Specifically, for example, if the data to be recorded is 0, 1, 2, 3, 4, and the recording resolution is set to 40, it means that 0, 1, 2, 3, 4 are divided into 41 gears, namely 0, 0.1, 0.2…1, 1.1, 1.2…2, 2.1, 2.2…3, 3.1, 3.2…4; then Ps and Ts are divided into 41 gears according to the set recording resolution 40, and the power value and time of the corresponding gear are calculated. When recording the adjusted data to be recorded, the power value and time of the laser are adjusted according to the gear described in the adjusted data to be recorded. If the compensation data is 0.1, it is in the second gear, so n is taken as 2 and substituted into the corresponding calculation formula to calculate the power and time when recording 0.1; if the compensation data is 3.3, it is in the 34th gear, so n is taken as 34 and substituted into the corresponding calculation formula to calculate the power and time when recording data 3.3.

[0101] In the recording stage, the peak power Pw and the peak power pulse time Ttop for recording and the sustaining power Pm and the sustaining power pulse time Tm for recording are determined based on the compensation data and in accordance with the recording strategy; and the recording laser pulse operation is performed on the preheated data bits according to the determined Pw, Ttop, Pm and Tm, so as to achieve high-resolution recording of the adjusted data to be recorded on the optical disc;

[0102] Specifically, the recording strategy is: setting the recorded peak power Pw and the peak power pulse time Ttop;

[0103] The recorded maintenance power Pm is set to:

[0104] Pm=W+Ps

[0105] Where W is the set fixed power, Ps is the laser power value that increases the temperature of the optical disc recording film;

[0106] The process of determining the pulse time Tm to maintain power is:

[0107] Set the pulse time Tm' of the reference maintenance power;

[0108] Divide Tm into a total of N+1 gears. According to the gear n where the compensation data is located, set Tm of the nth gear to:

[0109] Tm=Tm'*(1-n*1%).

[0110] Specifically, in this embodiment, the recording phase is a period in which recording marks are formed on the optical disc, that is, a phase in which the data to be recorded is recorded.

[0111] Specifically, in this embodiment, the difference W between Pm and Ps is a set fixed value, which is used to ensure that the power in the recording stage exceeds the power in the preheating stage, and there is a sufficient power difference to complete the recording state.

[0112] In the cooling stage, the minimum controllable power Pc and the cooling laser pulse time Tc for reducing the temperature of the optical disc recording film are set; and the cooling laser pulse operation is performed on the recorded data bits according to the set Pc and Tc.

[0113] Specifically, in the cooling stage, the cooling laser pulse time Tc is set to:

[0114] Tc=T-Ts-Tw

[0115] Where T is the time interval between the terminal of the last data to be recorded and the terminal of the current data to be recorded, and Tw is the total time of the recording phase.

[0116] Specifically, the cooling stage is a temperature reduction interval, the purpose of which is to avoid subsequent thermal effects and ensure the smooth progress of subsequent work.

[0117] Specifically, in this embodiment, the segmented laser control strategy is used to record the adjusted data to be recorded on the optical disc with high resolution, which has the following advantages: (1) controlling the thermal impact within the range of recording compensation; (2) reducing the degree of waveform distortion at the beginning of the data to be recorded; and (3) ensuring that the pulse width resolution meets the requirements.

[0118] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for accurately recording high resolution on a high density track, characterized in that: The specific steps include: S1: Preparation before recording S11: Acquire the data to be recorded in multi-base form; S12: constructing a data extraction frame, taking the first data bit of the data to be recorded as the starting position of the data extraction frame, and moving the data extraction frame one data bit each time, thereby extracting a plurality of combination models; S13: recording a plurality of combined models on an optical disc to obtain first distortion data; S14: performing a recording compensation operation based on the first distortion data to obtain a number of mark correction amounts; S2: Formal Recording Stage S21: For each combined model, a corresponding marking correction amount is used to perform compensation to obtain compensation data; S22: Recording the compensation data on the optical disc with high resolution based on a segmented laser control strategy.

2. The method for accurately recording high resolution on a high density track according to claim 1, characterized in that: In S14, the process of performing a recording compensation operation based on the first distortion data to obtain a plurality of mark correction amounts is as follows: The first distorted data is processed by using a recording compensation operation of five inter-symbol interference to obtain a mark correction amount, including: 1) inputting the first distorted data into a Volterra filter for convolution operation, and adjusting the first distorted data according to a signal adjustment strategy, and finally obtaining second distorted data; The signal adjustment strategy is: obtaining a convolution signal output by a Volterra filter; Record the amplitude difference between the convolution signal and each data bit of the combination model, and determine in turn whether each amplitude difference meets the set threshold value. If so, the first distorted data is the second distorted data. Otherwise, adjust the amplitude of each data bit in the first distorted data until the data bit of the convolution signal meets the above conditions. 2) Establishing an Lv. correction amount data table, and calculating the deviation between the data bits corresponding to the first distorted data and the second distorted data, i.e., the Lv. correction amount, and storing the deviation in the Lv. correction amount data table in sequence according to the data bit sequence number; 3) calculating the overlapping area between adjacent data in the first distorted data, and performing photoelectric conversion according to the overlapping area to obtain an overlapping recording signal of the data bit where the overlapping area is located, that is, an OLP recording signal; 4) adding the Lv. correction amount in the Lv. correction amount data table to the overlapped recorded signal according to the data bit sequence number to obtain the actual level of each data bit; 5) Calculating the amplitude difference between the actual level of each data bit and each data bit in the first distorted data to obtain the mark correction amount corresponding to each data bit.

3. The method for accurately recording high resolution on a high density track according to claim 2, characterized in that: In S21, for each combined model, the corresponding marking correction amount is used for compensation, and the process of obtaining compensation data is as follows: The mark correction amount is superimposed on the to-be-recorded data whose data bit sequence number is the middle sequence number in the corresponding combination model, thereby obtaining the compensation data.

4. The method for accurately recording high resolution on a high density track according to claim 3, characterized in that: In the process of recording compensation data on the optical disc with high resolution based on the segmented laser control strategy, the complete recording process of a data bit on the optical disc is divided into three stages, namely: Warm-up phase, recording phase and cooling phase; In the preheating stage, based on the compensation data and in accordance with the preheating strategy, a laser power value Ps and a laser pulse time Ts for increasing the temperature of the optical disc recording film are determined; and a preheating laser pulse operation is performed on the data bit in accordance with the determined Ps and Ts; In the recording stage, the peak power Pw and the peak power pulse time Ttop for recording and the sustaining power Pm and the sustaining power pulse time Tm for recording are determined based on the compensation data and in accordance with the recording strategy; and the recording laser pulse operation is performed on the preheated data bits according to the determined Pw, Ttop, Pm and Tm, so as to realize high-resolution recording of the compensation data on the optical disc; In the cooling stage, the minimum controllable power Pc and the cooling laser pulse time Tc for reducing the temperature of the optical disc recording film are set; and the cooling laser pulse operation is performed on the recorded data bits according to the set Pc and Tc.

5. The method for accurately recording high resolution on a high density track according to claim 4, characterized in that: The preheating strategy is: Set a reference laser power value Ps' for increasing the temperature of the optical disk recording film; Setting the laser pulse time Ts' for increasing the temperature of the optical disk recording film as a benchmark; The recording resolution of the data to be recorded is set to N, and the gear n of the data to be recorded is determined according to the value of the compensation data; Ps and Ts are divided into a total of N+1 gears. According to the gear n where the compensation data is located, the Ps of the nth gear is set to: Ps=Ps'*(1+n*1%) Set the Ts of the nth gear to: Ts=Ts'*(1+n*1%).

6. The method for accurately recording high resolution on a high density track according to claim 5, characterized in that: The recording strategy is: Set the recorded peak power Pw and peak power pulse time Ttop; The recorded maintenance power Pm is set to: Pm=W+Ps Where W is the set fixed power, Ps is the laser power value that increases the temperature of the optical disc recording film; The process of determining the pulse time Tm to maintain power is: Set the pulse time Tm' of the reference maintenance power; Divide Tm into a total of N+1 gears. According to the gear n where the compensation data is located, set Tm of the nth gear to: Tm=Tm'*(1-n*1%).

7. The method for accurately recording high resolution on a high density track according to claim 6, characterized in that: In the cooling stage, the cooling laser pulse time Tc is set to: Tc=T-Ts-Tw Where T is the time interval between the terminal of the last data to be recorded and the terminal of the current data to be recorded, and Tw is the total time of the recording phase.

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