Method of adaptive recording device for optical recording high density (variants) and a scheme for its implementation

 

(57) Abstract:

The invention relates to a method of recording on optical media. Proposed method adaptive recording device for optical recording high density and a scheme for its implementation. The circuit includes a discriminator for detection value of the current label of the input data and values of the front and/or rear intervals, the generator to control the shape of the signal pulse records in accordance with the magnitude of the current labels of the input data and values of the front and/or rear intervals to form a pulse adaptive recording device for excitation of the excitation light source by converting the pulse adaptive write current signal in accordance with the power levels of excitation for the corresponding channel. Widths of the first and/or last pulses of waveforms pulse recording change in accordance with the magnitude of the fluid input label data BUNI (coded non-return-to-zero inversion) and the value of the front and/or rear intervals, thus minimizing jitter and improving the reliability and efficiency of the system. The technical result - the possibility of increasing the density of zapisuje relates to a method of adaptive recording device for optical recording high density and a scheme for its implementation, and more specifically to a method of adaptive recording, which allows to optimize the power of the light beam of the light source, such as a laser diode, which will satisfy the characteristics of the recording device, and to the scheme for its implementation.

Art

With the advent of the media and the increasing need for storage media of large capacity, wide spread system optical recording using the recording media of large capacity, such as magneto-optical drive (MOD) or the drive, a digital versatile disk random access memory or random access memory device (DVD-RAM).

As the recording density increases, such optical recording systems require optimum and with high positioning accuracy. In General, the areal density increase temporary fluctuation (hereinafter referred to as jitter) in the data area. Thus to achieve high density recording, it is very important to minimize the jitter.

Typically, the pulse entry form as described in the book format DVD-RAM (Fig.1B) related to the data input of BUNI (coded non-return-to n is m case data BUNI share on the label and the frame. The intervals are at the level of the erase power for rewriting. The shape of the signal pulse recording for labels is equal to or greater than 3T label, that is, 3T, 4T...11T and 14T, consists of a first pulse, a last pulse and a sequence of multiple pulses. In this case, changing only the number of pulses in a sequence of multiple pulses depending on the size of the label.

In other words, the waveform of the pulse record consists of a combination of power reading (Fig.1C), peak power or capacity of the recording (Fig.1D) and power displacement or capacity of the Erasure (Fig.1E). In this case, all the corresponding signal power, as shown in Fig.1C, 1D and 1E are low level signals.

The shape of the signal pulse recording is fully compliant with DVD-RAM 2.6 GB first generation. In other words, in accordance with the standard DVD-RAM 2.6 GB, the shape of the signal pulse recording consists of a first pulse, a sequence of multiple pulse and the last pulse. Although the leading edge of the first pulse or falling edge of the last pulse can be read from the input field that will be used, adapt the write operation is carried out by means of formation of the impulse records (Fig.1B), adverse thermal noise may appear behind and ahead relative to the label in accordance with input data, BUNI. In other words, when the label is long, and the interval is short, or Vice versa, the jitter becomes the strongest. This is the main reason for the decline in the efficiency of the system. Moreover, it is not possible to use the system with different MCC-RAM high density, for example, DVD-RAM 4.7 GB second generation.

The invention

To solve the above problems, the present invention provides a method of adaptive write pulse recording, which is formed in accordance with the magnitude of the current labels of the input data and values of the front and/or rear intervals.

Another objective of the present invention is to create a schema adaptive recording device for optical recording of high density and optimize the power of light emission of the laser diode by forming pulse adaptive recording in accordance with the magnitude of the current labels of the input data and values of the front and/or rear intervals.

Accordingly, to solve the first problem is proposed a method of recording input data on optigo pulse and a sequence of multiple pulses, moreover, the method of adaptive recording includes the steps of controlling the shape of the signal pulse records in accordance with the magnitude of the current labels of the input data and values of the anterior and/or posterior intervals for the formation of adaptive pulse records and records of the input data using adaptive pulse for writing to optical recording media.

To resolve the second problem is proposed a device for recording input data on optical recording media using pulse recording waveform which consists of a first pulse, a last pulse and a sequence of multiple pulses, and the adaptive scheme record includes a discriminator for detection value of the current label of the input data and values of the front and/or rear intervals, generator to control the shape of the signal pulse records in accordance with the magnitude of the current labels of the input data and values of the front and/or rear intervals to form a pulse adaptive recording apparatus and excitation to the excitation light source by converting the pulse adaptive write current signal in accordance with the power levels of excitation for the corresponding channel.

Crack the ryh:

Fig. 1A-1E depict diagrams of waveforms of standard pulses of record;

Fig. 2 depicts a block diagram schematic of an adaptive recording device for optical recording, high-density, according to a variant implementation of the present invention;

Fig. 3A-3G depict diagrams of waveforms of the pulse adaptive recording, recorded with the scheme of the adaptive recording (Fig.2);

Fig.4 depicts the grouping of the input data;

Fig. 5 depicts a table showing the combination of pulses, which are formed by grouping (Fig.4);

Fig. 6 depicts a table illustrating the values of the shifts of the leading edge of the first pulse, according to the present invention;

Fig.7 depicts a table illustrating the values of the shifts of the trailing edge of the last pulse, according to the present invention;

Fig. 8 depicts the algorithm of the method of adaptive recording, according to a variant implementation of the present invention; and

Fig.9 depicts the comparison of the graphs of jitter that occurs in the method of adaptive recording of the present invention and the known method of entry.

A detailed description of the preferred option exercise

Below, with reference to maint istwa optical recording high density and a scheme for its implementation.

The adaptive scheme account, according to the present invention (Fig.2), includes a discriminator data 102, the controller 104 waveforms pulse recording, the microcomputer 106, the generator 108 pulses records and shaper 110 current.

In other words, the discriminator 102 recognizes data input data BUNI. The controller 104 waveforms pulse recording adjusts the waveform of impulse records in accordance with the recognition result of the discriminator 102 and data signal protrusion/recess. The microcomputer 106 initializes the controller 104 waveforms pulse recording or manages data stored in the controller 104 of the waveforms of the pulses of the record to be updated in accordance with the recording conditions. The generator 108 record of pulses generates a pulse adaptive recording in accordance with the output signal of the controller 104 waveforms pulse recording. The imaging unit 110 adapter converts the pulse adaptive recording, which is formed by the generator 108 pulses of records in the current signal in accordance with the power levels of the light emission of the respective channels for the excitation light source.

Below, with reference to Fig.3-7 describes the operation of the device (Fig.2).

Aya called in the future, the current label), the spacing (pause) in front of the first pulse current label (which will be referred to as a forward interval) and the interval (pause) behind the last pulse current label (which will be referred to as the rear window) of the input data BUNI and delivers the values of the front and rear intervals and the magnitude of the current tag in the controller 104 of the waveforms of the pulses of the recording.

The values of the front and rear intervals and the value of the current label can be in the range of 3T to 14T. In this case, it may be more than 1000 possible combinations. Thus, in all cases, the required schema or storage device to obtain the shear values of the front of the fronts of the first pulse and the back edge of the last pulse, which complicate the system and hardware. Therefore, in the present invention the value of the current label and the front and rear of the intervals of the input data BUNI group in the group with short pulses, the group with medium pulses and the group with long pulses and use the grouped value of the current label and the front and rear intervals.

The controller 104 waveforms pulse recording produces a shift of the leading edge Perea from discriminator 102 data or produces a shift of the trailing edge of the last pulse back and forth in accordance with the values of the current label and the back of the interval, thus forming a pulse recording with the optimum power of the light beam. In this case, a sequence of multiple pulses tag takes the same form as in Fig.3B, that is, 0.5 T.

In addition, the controller 104 waveforms pulse recording can adjust the leading edge of the first pulse current label and falling edge of the last pulse current label with different values in accordance with the supplied external signals protrusion/recess (PROTRUSION/RECESS) that indicate whether the input data BUNI on the track of the ledge or on the track recess. It is necessary for the formation of recording pulses with respect to the different values of the optimal power light emission depending on the protrusion and recess. The difference between the values of the optimal capacity of the light emission between the protrusion and the recess, which is 1-2 mW, it is possible, in particular, to install or operate it with the use of technical terms.

Therefore, the controller 104 waveforms pulse records may log tapanuli and the offset value of the trailing edge of the last pulse in accordance with the magnitude of the current labels of the input data BUNI and magnitudes of the front and rear intervals, or logic circuitry. When the controller 104 waveforms pulse recording includes a storage device, the width of the first pulse and the last pulse is defined as the signals (T) canal plus and minus the value of the data (the offset value) that is stored in the storage device. In addition, this storage device can store the values of the shifts of the first and last pulses of the label for each of the protrusion and recess. In addition, you can add a table in which is stored the value of the shift of the leading edge of the first pulse, and a table that stores the offset value of the trailing edge of the last pulse. On the other hand, as shown in Fig.6 and 7, it is possible to use two separate tables.

The microcomputer 106 initializes the controller 104 waveforms pulse records or controls the shift values of the first and/or last pulse (pulses) to update in accordance with the recording conditions. In particular, in accordance with the areas you can change the power of light emission or you can reinstall the shift values of the first and last pulses.

The data widths of the pulses that are designed to control the shape of the ICI adaptive recording, as shown in Fig.3F, in accordance with the data values of the pulse width to control the shape of the signal pulse recording, supplied from the controller 104 waveforms pulse recording, and supplies the control signals shown in Fig.3C, 3D and 3E, designed to control the electric current in the respective channels (i.e. channels readout, peak and offset) for the duration of the pulse adaptive recording, the imaging unit 110 current.

The imaging unit 110 adapter converts the level of excitation power light emission of the respective channels (i.e. channels readout, peak, and offset) in the current control period of time, which corresponds to the control signal to control the electric current of the respective channels so that the current can flow through the laser diode so that the appropriate amount of heat transferred to the recording medium by means of a continuous relay (on / off) laser diode or by changing the amount of light. In this case, the recording medium is formed in the recording area, as shown in Fig.3G.

In Fig. 3A shows an input data BUNI, which is divided into a tag and an interval. On name comparison with the cutting edge of the current label. Fig.3C depicts the shape of the signal power readout pulse adaptive recording, Fig.3D depicts the waveform peak power of the pulse adaptive recording, and Fig.3E depicts the shape of the signal power offset pulse adaptive recording. Fig.3F shows the waveform of the pulse adaptive accounts proposed in the present invention. The leading edge of the first pulse of the recording signal pulse adaptive recording can be shifted back and forth in accordance with the combination of the magnitude of the forward interval and the value of the current tag.

Arbitrary power (in this case, the power of reading or recording power) is supplied during a period corresponding to the shift. Similarly, the falling edge of the last pulse adaptive recording can be shifted back and forth in accordance with the combination of the value of the current label and value of the rear frame. In addition, arbitrary power (in this case, the power of reading or recording power) is supplied during a period corresponding to the shift.

On the other hand, the falling edge of the last pulse can be shifted back and forth in accordance with the magnitude of the current label, regardless of the size of the rear spacing current label. It is the ONT any momentum. Moreover, given the shift direction, the shift can be run backward and forward, only forward or only backward.

In Fig.4 shows the grouping of the input data BUNI, which shows two sample groups. In the first example, if the pointer of the lower group is equal to 3 and the pointer of the upper group is equal to 12, then the label of the group of short pulses is equal to 3T, labels, medium-sized group of pulses equal from 4T to 11T, and the tag group long pulses equal to 14T. In the second example, if the pointer of the lower group is 4 and the pointer of the upper group is equal to 11, then label the groups of short pulses is equal to 3T and 4T, the label medium-sized group of pulses equal from 5T to 10T, and marks the group's long pulses is equal to 11 T and 14 T. As described above, as used index of the lower group and the pointer of the upper group, the increased efficiency of use. In addition, the grouping can be performed in different manners for the respective zones.

Fig. 5 depicts the number of cases that depend on combinations of the front and rear intervals and the current label, in the case of the classification input data BUNI in three groups, as shown in Fig.4, using pointers groups. Fig. 6 depicts a table, BOCOG and the value of the current label. Fig.7 depicts a table showing the values of the shifts back edge of the last pulse, depending on the value of the current label and value of the rear frame.

In Fig.8 shows an algorithm illustrating a variant of the method of adaptive recording according to the present invention. First, set the recording mode (step S101). If the recording mode is selected, determine whether it is adaptive recording or not (step S102). If at step S102 determines that the recording mode is a mode adaptive recording, then set the index group (step S103). Then choose the table groups depending on the index group (step S104). The selected table group can be a table reflecting the protrusion/recess, and the pointer groups. In addition, the selected table group can be a table reflecting zones of the recording media.

The values of the shift of the leading edge of the first pulse read from the table shown in Fig. 7, in accordance with the combination of the current label and rear interval (step S106).

Form the adaptive pulse recording, in which the first pulse and the last pulse is controlled in accordance with snakey light emission of the respective channels for the generated pulse adaptive recording, that is, the power values of the read peak power and the power offset in order to perform a write operation on the disk (step S109). If the recording mode is not adaptive recording at step S107, form the total recording mode.

In Fig. 9 depicts a graph showing the comparison of jitter that occurs when the recording method of the adaptive recording, according to the present invention, the known recording method. It should be understood that when the peak light emission, equal to 9.5 mW, lower power sequence of multiple pulses of 1.2 mW, cooling energy of 1.2 mW and the power offset of 5.2 mW, less jitter when recording pulse adaptive recording, according to the present invention than when writing a fixed pulse recording, in accordance with a known method of recording. In terms of initialization speed is 4.2 m/s, the capacity of the Erasure of 7.2 mW and the number of write operations 100.

In other words, according to the present invention, when the adaptive change label impulse records, the leading edge of the first pulse adaptive shifts in accordance with the magnitude of the forward interval and the value of the current label of the input data BUNI, so the but is shifted in accordance with the magnitude of the current label and the value of the posterior interval of the input data BUNI, thus allowing you to control the shape of the signal pulse recording while minimizing jitter. Moreover, the shape of the signal pulse can be optimized in accordance with the signals protrusion/recess". Moreover, in the present invention the grouping can be performed in different manners for each area with the use of pointers groups.

A new method of adaptive recording, according to the present invention can be adapted to devices optical recording with a higher density using adaptive pulse recording.

As described above, the width of the first and/or last pulses of the record is changed in accordance with the magnitude of the current labels of the input data BUNI and the size of the front or rear of the interval, thereby minimizing jitter, which improves the reliability and efficiency of the system. Moreover, the pulse width of the write control by grouping the value of the current label and value of the front or rear intervals, thus reducing the size of hardware.

1. Method for recording input data on an optical recording medium using a recording signal, the form of which is composed of the first pulse, the last inwise by controlling the width of the first pulse and/or width of the last pulse waveform records in accordance with the magnitude of the current labels of the input data and values of the interval in front of the first pulse current label and/or interval behind the last pulse current label for signal recording, and (b) write the input data using the recording signal on the optical recording media.

2. The way you write under item 1, characterized in that step (a) includes the step of forming a recording signal, and the leading edge of the first pulse change in accordance with the amount of space in front of the first pulse current label and the value of the current label.

3. The way you write under item 1, characterized in that step (a) includes the step of forming a recording signal, and the falling edge of the last pulse change in accordance with the magnitude of the current label and the amount of space behind the last pulse current label.

4. The way you write under item 1, characterized in that step (a) includes the step of forming a recording signal, and the leading edge of the first pulse change in accordance with the amount of space in front of the first pulse current label and the value of the current label, and the falling edge of the last pulse change in accordance with the magnitude of the current label and the amount of space behind the last pulse current label.

5. The way you write under item 1, characterized in that step (a) includes the step of forming a recording signal, and the leading edge of the first pulse add the Oh current label, and falling edge of the last pulse to move back or forward in accordance with the magnitude of the current label and the amount of space behind the last pulse current label.

6. The way you write on p. 5, characterized in that the power of the light radiation for a given channel serves for a period corresponding to the shift of the leading edge of the first pulse and during a period corresponding to the shift of the trailing edge of the last pulse.

7. The way you write on p. 6, characterized in that the power of the light radiation for a given channel is the capacity of the reading or recording power.

8. The way you write under item 1, characterized in that it further (C) adjusting the shape of the recording signal in accordance with the signal protrusion/recess" indicating whether the input data tracks ledge or data tracks deepening.

9. Method for recording input data on an optical recording medium using a recording signal, the form of which consists of a first pulse, a last pulse and a sequence of multiple pulses to optimize the power of light emission of the light source, namely, that (a) choose one of the tables group, Sokh the x data grouped with at least one pointer grouping, (b) calculate the width of the first and/or last pulse of the recording using the data that remain in the selected table group, and (c) write the input data using a recording signal, which is formed in accordance with the calculated width, optical recording media.

10. The way you write under item 9, characterized in that table grouping retain the data widths of the first and/or last pulses of waveform recording with the group the value of the current label of the input data and the values of the interval in front of the first pulse current label and/or interval behind the last pulse current label in the group of short pulses, in the group of medium pulse in the group of long pulses.

11. The way you write under item 9, characterized in that table grouping retain the data widths of the first and/or last pulses of waveform recording with the group the value of the current label of the input data and the values of the interval in front of the first pulse current label and/or interval behind the last pulse current label in the group of short pulses, in the group of medium pulse is ice deepening.

12. The way you write under item 9, characterized in that table grouping retain the data widths of the first and/or last pulses of waveform recording with the group the value of the current label and the values of the interval in front of the first pulse current label and/or interval behind the last pulse current label in the group of short pulses, in the group of medium pulse in the group of long pulses for the respective zones on the recording media.

13. The way you write under item 9, wherein (b1) reads the value of the shift of the leading edge of the first pulse in accordance with a combination of the amount of space in front of the first pulse current label and the value of the current label to calculate the data widths of the first pulse, and (b2) reads the value of the shift of the trailing edge of the last pulse in accordance with a combination of the value of the current label and the amount of space behind the last pulse current label to calculate the data values of the width of the last pulse.

14. Method for recording input data on an optical recording medium using a recording signal, the form of which consists of a first pulse, a last pulse and a sequence of multiple pulses, the s current label of the input data and intervals in front of the first pulse current label and behind the last pulse current label, (b) generate the data pulse width to change the width of the first and/or last pulses of waveform records in accordance with the magnitude of the current label and the values of the intervals in front of the first pulse current label and/or behind the last pulse current label, and (c) form a recording signal in accordance with the data pulse width, which allow you to convert the recorded signal into a current signal in accordance with the power levels of excitation for the corresponding channel for the duration of the recording signal, the excitation light source.

15. The way you write on p. 14, wherein (b1) forming the data widths of the first pulse to the shift of the leading edge of the first pulse forward or back in accordance with the amount of space in front of the first pulse current label and the value of the current label, and (b2) forming the data widths of the first pulse to the shift of the trailing edge of the last pulse forward or back in accordance with the magnitude of the current label and the amount of space behind the last pulse current label.

16. The way you write on p. 15, characterized in that the power of the light radiation for a given channel is served during the period that corresponds to the NTA of the last pulse.

17. The way you write under item 16, characterized in that the power of the light radiation for a given channel is the capacity of the reading or recording power.

18. The way you write under item 14, characterized in that it further (d) adjusting the shape of the recording signal in accordance with the signal protrusion/recess" indicating whether the input data tracks ledge or data track grooves, and the input data are the data of BUNI (coded non-return-to-zero inversion).

19. A device for recording input data on an optical recording medium using a recording signal, the form of which consists of a first pulse, a last pulse and a sequence of multiple pulses containing a discriminator for detection value of the current label of the input data and the values of the intervals in front of the first pulse current label and/or behind the last pulse current label generator to control the shape of the recording signal in accordance with the magnitude of the current labels of the input data and values of the intervals in front of the first pulse current label and/or behind the last pulse current label for signal recording, and the exciter to excite the East is the origin for the corresponding channel.

20. A device for recording under item 19, characterized in that the generator includes a controller waveforms account to generate the data pulse width to change the width of the first pulse in accordance with the amount of space in front of the first pulse current label and the value of the current label and change the width of the last pulse in accordance with the magnitude of the current label and the amount of space behind the last pulse current label, and a signal generator for generating the recording signal in accordance with the data pulse width.

21. A device for recording on p. 20, wherein the controller waveforms record consists of a storage device that stores data on the width of the first and/or last pulses of the recording signal by grouping the value of the current label and the values of the intervals in front of the first pulse current label and behind the last pulse current label in the group of short pulses, in the group of medium pulse in the group of long pulses.

22. A device for recording on p. 21, characterized in that it further comprises a microcomputer to initialize the controller waveforms records and data management the pulse width to the 3. A device for recording on p. 21, wherein the storage device stores the data width of the first and/or last pulses of waveform records depending on whether the input data on the track of the ledge or on the track deepening.

24. A device for recording on p. 21, wherein the storage device stores the data width of the first and/or last pulses of the waveform record for the respective zones on the recording media.

25. A device for recording on p. 20, characterized in that the power of the light radiation for a given channel is to be submitted within a period corresponding to the changed width of the first pulse and during a period corresponding to the changed width of the last pulse.

26. A device for recording on p. 25, characterized in that the power of the light radiation for a given channel is the capacity of the reading or recording power.

 

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