JPH10112111A - Disk recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To drastically shorten the waiting time until a disk can be recorded and to improve the responsiveness of recording operation at the time of continuously recording over different zones in target nuember of revolution in the disk recording and reproducing device for recording a RAM disk. SOLUTION: At the time of continuously recording cover different zones in target number of revolution, by using a means for generating a writing clock signal for a recording and reproducing w7signal generating means 3 by a PLL means 25 using a means 12 for detecting a reproduced address position signal and a means for controlling motor so as to make an output signal of the address position signal detecting means 12 coincide with an output signal frequency of a 2nd frequency dividing means 16 for controlling a frequency dividing ratio, the device capable of recording operation even under the state of noncincidence between the number of revolution of the motor and a target number of revolution of a zone to be recorded can thus be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk recording / reproducing apparatus which uses a digital disk as a disk-shaped recording medium for recording / reproducing.

[0002]

2. Description of the Related Art A DVD-RAM disk capable of recording and reproduction is divided into a plurality of zones in the disk, and the target rotation speed of the disk in the same zone is the same, but the target rotation speed of the disk in different zones is not equal. Each is different. Generally, such a method is called a zone CLV. Each zone is divided into a plurality of sectors, and each sector is composed of a recording area in which information can be recorded and an address area in which addresses of the sector are recorded.

[0003] A conventional disk recording / reproducing apparatus will be described below. FIG. 5 is a block diagram of a conventional disk recording / reproducing apparatus, and FIG. 6 is an operation explanatory diagram for explaining the operation of the conventional example. In FIG. 5, 1 is a motor, 2 is a disk, 3 is a recording / reproducing signal generating means, 12 is an address position signal detecting means, 15 is a reference signal generating means,
Reference numeral 16 denotes a second frequency dividing unit, 17 denotes a motor control unit, and 30 denotes a rotation state determining unit.

The operation of the disk recording / reproducing apparatus configured as described above will be described below. An address position signal is extracted from a reproduction signal reproduced from the disk 2 using the recording / reproduction signal generation means 3 by the address position signal detection means 12, and the obtained address position signal is output to the motor control means 17 and the rotation state determination means 30. Is output to The output of the reference signal generator 15 is input to the recording / reproducing signal generator 3 and the second frequency divider 16. The recording / reproducing signal generating means 3 uses the output signal of the reference signal generating means 15 as a reference clock when generating a recording signal. The second frequency dividing means 16 frequency-divides the output signal of the reference signal generating means 15 at a predetermined frequency dividing ratio and outputs it to the motor control means 17 and the rotation state determining means 30. The motor control means 17
A control signal for controlling the rotation of the motor is generated such that the output signal of the frequency dividing means 16 and the output signal of the address position signal detecting means 12 coincide with each other, and is applied to the motor 1 to control the rotation of the disk 2. . The rotation state discriminating means 30 includes the output signal of the second frequency dividing means 16 and the address position signal detecting means 1.
The output signal of the disc 2 is compared with the output signal of the disc 2 to determine whether or not the rotation speed of the disk 2 is within a predetermined rotation speed range. Recording / reproduction signal generation means 3
If the result of the determination by the rotation state determination means 30 is within the predetermined rotation speed range, the recording operation is enabled, and recording of information on the disk is started. If the rotation speed is out of the range, the recording operation is disabled, and the recording of information on the disk is in a standby state.

In such a configuration, a DVD-RAM
The operation in the case of recording continuously in a plurality of zones of the disc will be described with reference to FIG. Each zone is divided into a plurality of sectors, and each sector has a recording area where information can be recorded and an address area where addresses of the sectors are recorded. For example, if each sector is composed of a 130-byte address area and a 2567-byte recording area, one byte is 16 channel bits (bit clock). Therefore, the number of clocks that can be recorded in one sector is as follows. 2567 × 16 = 41072 clocks, and when one sector is represented by a channel bit (bit clock), 2697 × 16 = 43,152 clocks ‥‥‥ (1) That is, as shown in the equation (1), by setting the set value of the frequency dividing ratio N of the second frequency dividing means 16 as N = 43,152, the number of rotations of the motor at the recording position of the disk is set. In the state in which coincides with the target rotation speed of the zone, all the predetermined information can be recorded in the recording area of the sector as shown in the example of the zone N in FIG.

However, in the case where information is continuously recorded from zone N to zone N + 1, when the recording / reproducing position enters the area of zone N + 1, the rotation speed of the disk is changed over time by the motor control means 17 to the target rotation speed of zone N. The number gradually changes from a value equal to the number to a value equal to the target rotation speed of the zone N + 1. However, from zone N to zone N
At the moment of entering the area of +1, the target rotation speed of the zone N + 1 is smaller than the target rotation speed of the zone N, and therefore the rotation speed of the disk is higher than the target rotation speed of the zone N + 1.
Therefore, in this state, as shown in FIG. 6B, the period of the address position signal is shortened, and when information is recorded by the recording / reproducing signal generating means 3 using the output signal of the reference signal generating means 15 used at the time of recording. In this state, the predetermined information is not recorded in the recording area, but is recorded in the address area and the recording area of the next sector. When the information recorded in this way is reproduced from a disk, the information recorded in the address area cannot be reproduced, so that it is impossible to completely restore the recorded information.

Therefore, when information is continuously recorded from zone N to zone N + 1, the recording / reproducing position is set to zone N + 1.
When the disk rushes into the area, the rotational speed of the disk is increased to zone N + 1.
The recording operation is interrupted until the target rotation speed in the area indicated by the reference number is reached, and the apparatus is in a recording waiting state. Then, as shown in FIG. 6C, after detecting that the rotation speed of the disc matches the target rotation speed of the zone N + 1, recording of information in the recording area is started.

[0008]

However, in the above-mentioned conventional configuration, when recording is continuously performed over zones having different target rotation speeds, for example, when recording is continuously performed from zone N to zone N + 1 shown in FIG. Immediately after crossing the zone, the rotation speed of the disk becomes higher than the target rotation speed of the zone N + 1, so that the output signal frequency of the address position signal detecting means 12 becomes relatively high, and the period of the output signal becomes short. However, the recording clock signal generated by the recording / reproducing signal generating means 3 based on the output signal of the reference signal generating means 15 has a constant frequency regardless of the recording / reproducing position. For this reason, if information is recorded in the information area by the recording clock signal generated by the recording / reproduction signal generation means 3 based on the output signal of the reference signal generation means 15, the recording operation does not end in the information area. However, even the address area and the recording area of the next sector are recorded, so that when the recorded information is reproduced from the disk, correct information cannot be obtained. Therefore, when information is continuously recorded from zone N to zone N + 1, when the recording / reproducing position enters zone N + 1, the recording operation is not performed until the disk rotation speed matches the target rotation speed of zone N + 1. Are configured to start the recording operation after they match.

That is, when recording is performed across a zone, the motor is controlled to wait for the recording operation until the rotation speed of the disk matches the target rotation speed of the zone. Therefore, there is a problem that the responsiveness of the recording operation is poor, and an approach for improving the responsiveness is required. SUMMARY OF THE INVENTION An object of the present invention is to significantly reduce the waiting time until recording can be performed on a disk and improve the responsiveness of a recording operation when recording is continuously performed over zones having different target rotation speeds.

[0010]

SUMMARY OF THE INVENTION In order to solve this problem, the present invention is directed to a case where recording is continuously performed over zones having different target rotation speeds, and the output signal of a reproduced address position signal detecting means is tracked. Means for generating a write clock signal of the recording / reproducing signal generating means by the PLL means,
A structure using means for controlling the frequency dividing ratio of the second frequency dividing means and means for controlling the motor so that the output signal of the address position detecting means coincides with the output signal frequency of the second frequency dividing means. In response to the change in the target rotation speed of the disk due to the traversal between the zones, the second frequency dividing means is not a target rotation speed of the zone to be newly recorded but a predetermined rotation speed close to the target rotation speed of the zone before the entry. The frequency division ratio is set to an initial value to control the rotational speed of the motor to be equal to a predetermined rotational speed, and to control the PLL means so that a clock signal used for recording can be correctly recorded in the recording area. When the frequency division ratio setting means determines that the rotational speed of the disk matches the predetermined rotational speed, the operation of recording information on the disk is started. Thereafter, the rotation speed of the motor is changed from a value obtained by setting the frequency division ratio of the second frequency dividing means to an initial value within a range that does not hinder the recording operation, and the rotation speed of the disk is changed to the target rotation speed of the recording zone. Are controlled so as to match.

Thus, when recording is continuously performed over zones having different target rotation speeds, when recording is performed after entering a new zone, the recording operation is started even when the target rotation speed of the new zone has not been reached. Therefore, it is possible to shift to the recording operation with a short waiting time, and it is possible to obtain a disk recording / reproducing apparatus with good responsiveness of the recording operation.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention according to claim 1 of the present invention provides an address position signal detecting means for detecting an address position signal recorded on a disk when recording on a disk, and an address position signal detecting means. Frequency comparing means for comparing the frequency of the output signal of the first frequency dividing means with the frequency of the output signal of the first frequency dividing means, and applying the output of the frequency comparing means to the input of the VCO means which is a voltage controlled oscillating means through a first LPF. VC
PLL means configured to obtain an output signal from the O means and to input the output signal of the VCO means to the first frequency dividing means, a reference signal generating means for generating a reference signal, and an output of the reference signal generating means. A second frequency dividing means, a motor control means for controlling a motor using an output signal of the address position signal detecting means and an output signal of the second frequency dividing means, and an output signal of the address position signal detecting means And a frequency division ratio control means for outputting a control signal for controlling the setting of the frequency division ratio of the second frequency division means using the output signal of the second frequency division means. The output signal of the VCO means is used as a clock signal used at the time of recording. When recording is continuously performed in zones having different target rotation speeds, the second dividing means controls the frequency division ratio to control the second frequency. Of the frequency dividing means Varying the signal frequency of the force signal,
As a result, the control of the motor using the output signal of the second frequency divider and the output signal of the address position signal detector means that the frequency of the output signal of the second frequency divider is equal to the address position signal detector. Can be controlled so that these output signals coincide with each other, so that the recording operation can be performed even when the motor rotation speed does not match the target rotation speed of the recording zone.

According to a second aspect of the present invention, in the PLL means, a reproduction clock extracting means for extracting a reproduction clock signal recorded at an address position of a reproduction signal of a disk, an output signal of the reproduction signal extracting means and a PLL means. Phase comparison means for comparing the phase difference with the output signal of the VCO means, and addition means for adding the signal obtained by the output of the phase comparison means through the second LPF and the output signal of the first LPF. , The output signal of the addition means is input to the VCO means, and the phase difference error between the bit clock signal existing in the address area and the output signal of the VCO means is also used by the PLL means. This has the effect of improving the accuracy of the PLL operation.

According to a third aspect of the present invention, in the frequency division ratio control means, the wavelength of the output signal of the address position signal detection means is within a predetermined range based on the wavelength of the output signal of the second frequency division means. Determining means for outputting a determination result of whether or not
The division ratio setting means is configured by the division ratio setting control means for controlling the set value of the division ratio according to the result of the judgment means, and the state of the rotation speed of the motor is constantly monitored. Therefore, the frequency division ratio can be controlled more optimally and more responsively.

According to a fourth aspect of the present invention, in the frequency division ratio control means, the wavelength of the output signal of the address position signal detection means is within a predetermined range based on the wavelength of the output signal of the second frequency division means. For example, the frequency division ratio is changed at a predetermined ratio every predetermined time until the final target value. In a recording operable state, the frequency division ratio of the second frequency dividing means is changed for a predetermined time. By continuously changing the frequency, the frequency division ratio can be controlled optimally and with a simple configuration.

According to a fifth aspect of the present invention, in the case of recording on a disk, an address position signal detecting means for detecting an address position signal recorded on the disk, an output signal of the address position signal detecting means and a first signal. Frequency comparing means for comparing the frequency with the output signal of the frequency dividing means, and the output of the frequency comparing means is passed through the first LPF and applied to the input of the VCO means to obtain an output signal from the VCO means and the output signal of the VCO means. , A reference signal generating means for generating a reference signal, a second frequency dividing means for dividing the output of the reference signal generating means, and an address position signal. A motor control means for controlling a motor using an output signal of the detection means and an output signal of the second frequency division means; and a second frequency division means based on information on the number of rotations of the disk and the reproduction position. A division ratio control means for setting a division ratio, wherein an output signal of the VCO means constituting the PLL means is used as a clock signal used at the time of recording. When recording is continuously performed on the disk, the frequency division ratio of the second frequency dividing means used for controlling the motor is controlled by using information on the rotational speed and the radial position of the disk according to the position on the disk where the recording operation is performed. To change the signal frequency of the output signal of the second frequency dividing means. As a result, with respect to the control of the motor using the output signal of the second frequency dividing means and the output signal of the address position signal detecting means, Since the output signal of the address position signal detecting means can be controlled to match the frequency of the output signal of the frequency dividing means of 2, the rotational speed of the motor does not match the target rotational speed of the recording area. An effect that can be recorded also work state.

According to a sixth aspect of the present invention, in the frequency division ratio control means, the information on the number of rotations and the reproduction position of the disk is detected and detected by using a signal obtained by the recording and reproduction signal generation means. It is obtained by determining the area to be recorded from the address, and is configured to set the frequency division ratio of the second frequency dividing means according to the result of the determination,
Since the frequency division ratio of the second frequency dividing means can be controlled according to the recording / reproducing position of the disc, the frequency division ratio can be set with an optimal and simple configuration.

According to a seventh aspect of the present invention, in the frequency division ratio control means, information on the address and the target rotational speed of the disk is stored in advance in the storage element, and the storage element is searched using the detected address. Since the information of the disk position and the target rotation speed is stored in advance, it is possible to easily and optimally set the frequency division ratio by determining the address.

According to an eighth aspect of the present invention, in the frequency division ratio control means, the wavelength of the output signal of the address position signal detection means is within a predetermined range based on the wavelength of the output signal of the second frequency division means. For example, it is configured to output a determination signal indicating that a printing operation is possible to a block that performs a printing operation.
By judging whether or not the recording operation is possible by the frequency division ratio setting means and controlling the recording operation of the recording / reproducing signal generation means, the recording according to the rotation state of the disk can be performed optimally and with good response.

FIG. 1 shows an embodiment of the present invention.
This will be described with reference to FIG. Embodiment 1 Hereinafter, an embodiment of the present invention will be described.
This will be described with reference to the drawings. FIG. 1 shows a block diagram of a disk recording / reproducing apparatus according to the present invention. In FIG. 1, 1 is a motor, 2 is a disk, 3 is a recording / reproducing signal generating means, 4 is a reproducing clock extracting means, 5 is a phase comparing means,
6 is a second LPF, 7 is a frequency comparing means, and 8 is a first LF.
PF, 9 are adding means, 10 is VCO means, 11 is first frequency dividing means, 12 is address position signal detecting means, 15 is reference signal generating means, 16 is second frequency dividing means, and 17 is motor control means. , 18 are discriminating means, 19 is a dividing ratio setting means,
Reference numeral 25 denotes a block of the PLL means, and reference numeral 26 denotes a block of the frequency division ratio control means.

The operation of the block of the disk recording / reproducing apparatus configured as described above will be described below.
When a recording operation is performed in a state where the motor 1 on which the disk 2 is mounted is rotating at a predetermined target rotation speed, a signal recorded on the disk 2 is reproduced by the recording / reproduction signal generating means 3. The output of the recording / reproducing signal generating means 3 is input to a reproducing clock extracting means 4 and an address position signal detecting means 12, and the reproducing clock extracting means 4 records the data in an address area and outputs it to a phase comparing means 5, and outputs the address position signal. The detecting means 6 outputs an address position signal indicating the address position to the frequency comparing means 7, the motor control means 17, and the division ratio control means block 26.

The phase comparing means 5 compares the phase of the reproduced bit clock extracted by the reproduced clock extracting means 4 with the output signal of the VCO means 10, and the obtained phase error is the second L
The signal is input to the adding means 9 via the PF 6. The frequency comparing means 7 is a signal obtained by dividing the address position signal generated by the address position signal detecting means 7 and the output signal of the VCO means 10 to a predetermined dividing ratio by the first frequency dividing means 11. And the frequency error obtained is the first LPF 8
Is input to the adding means 9. The adder 9 adds the outputs of the first LPF 8 and the second LPF 6, applies the result to the VCO 10, and obtains a predetermined output signal from the output of the VCO 10. The output signal of the VCO means 10 is input to the recording / reproducing signal generating means 3 and used as a bit clock signal at the time of recording.

The reference signal generated by the reference signal generating means 15 is frequency-divided by the second frequency dividing means 16, and the motor control means 17
And the determination means 18 are inputted. Motor control means 17
Uses the output signal of the address position signal detecting means 12 and the output signal of the second frequency dividing means 16 to convert the output signal of the address position signal detecting means 12 to the output signal of the second frequency dividing means 16 A control signal for controlling the rotation of the motor 1 linked to the disk 2 so as to be in a state is generated and output to the motor 1.

The discriminating means 18 compares the wavelength of the output signal of the address position signal detecting means 12 with the wavelength of the output signal of the second frequency dividing means 16 so that the difference between the wavelengths of the two output signals is within a certain range. Is determined, and the result of the determination is output to the recording / reproducing signal generating means 3 and the dividing ratio setting means 19. The frequency division ratio setting means 19, according to the determination result of the determination means 18,
A control signal for setting the frequency division ratio of the second frequency dividing means 16 is:
It is input to the second frequency dividing means 16. If the determination result of the output signal of the determination unit 18 indicates that the output signal is within a certain range (recording OK), the recording / reproduction signal generation unit 3 recognizes that the recording operation is possible and executes the recording operation. Conversely, if the result of the determination by the determination means 18 indicates a value outside the predetermined range (recording NG), it is determined that the recording operation is not possible, and the recording wait state is maintained.

In such a configuration, the operation will be described with reference to the operation explanatory diagrams of FIGS. FIG. 2 is an operation explanatory diagram for explaining an outline of the operation of the PLL means 25.
FIG. 3 is an operation explanatory diagram for explaining the operation of the disk recording / reproducing apparatus. The operation of the PLL means 25 is as follows, assuming that the frequency division ratio of the first frequency dividing means 11 is N1, the output signal frequency of the address position signal detecting means 12 is fa, and the output signal frequency of the VCO means 10 is fo. Be established.

Fo = N1 × fa ‥‥‥ (2) Further, the phase generated by the phase comparing means 5 using the reproduced bit clock signal in the address area obtained by the reproduced clock extracting means 4 and the output signal of the VCO means 10 By inputting the error signal to the VCO means 10, not only the reproduced bit clock and the output signal frequency of the CVO means 10 but also the phase can be matched.

For example, as shown in FIG. 2, one sector area of a RAM disk composed of an address area (130 bytes) and a recording area (2567 bytes) has 2697 bytes, and one byte is 16 channel bits. Therefore, the channel bits in one sector are 2697 × 16 = 43,152. Therefore, by setting the frequency dividing ratio N1 of the first frequency dividing means 11 to N1 = 43152１５ (3), a signal having a frequency N1 times the output signal frequency of the address position signal detecting means 12 can be obtained. , VCO means 10. Thus, P
When the operation of the LL means 25 is stable, a signal having the same number of clocks as the predetermined channel bit in the sector is obtained from the output of the VCO means 10 which is the output of the PLL means 25, and the recording / reproducing signal generating means 3 , The information can be recorded on the disc.

Next, the case where the recording / reproducing position moves from zone N to zone N + 1 as shown in FIG. 3 will be described.
The section of zone N up to (a) of FIG. 3 and the section of zone N + 1 after (d) of FIG. 3 show a state in which the target rotation speed is stable in each region, and ( a)
Sections (b) to (b) show the separation zone of the zone, and (b) to (d) of FIG. 3 show a transient state when the vehicle enters the zone N + 1.

The recording / reproducing position is from zone N to zone N + 1.
, The target rotation speed of the disk changes discontinuously from FIG. 3A showing the state of the zone N zone to FIG. 3B showing the state where the disk has entered the zone N + 1.
Similarly, the frequency of the reproduction address position signal becomes relatively large because the rotation speed of the disk is higher than the target rotation speed of the new zone, and the control state of the PLL transits to a transient state.

In the state shown in FIG. 3B, the second frequency dividing means 16 sets the frequency dividing ratio with a predetermined value between the target rotational speeds of the zone N and the zone N + 1 as an initial value. The target rotation speed of the zone N + 1 is a value according to the division ratio set value of the initial value of the second division unit 16. In this state,
Until the PLL unit 25 is in a stable state and the number of rotations of the disk is equal to the value corresponding to the initial value of the dividing ratio setting value (the state of FIG. 3C), the second dividing unit 16
Does not change.

As shown in FIG. 3C, the discriminating means 18 determines that the PLL means 25 is in a stable state and that the rotational speed of the disk coincides with the value corresponding to the initial value of the dividing ratio. Is detected thereafter, the frequency division ratio control means 26
By controlling the set value of the frequency division ratio of the second frequency dividing means 16, the rotational speed of the disk gradually approaches the target rotational speed of the zone N + 1 and finally coincides with the target rotational speed of the disk in the zone N + 1. . Here, the reason why the rotation speed of the disk is controlled is that the pull-in time of the PLL cannot be ignored compared to the change in the rotation speed of the motor.

For example, assuming that the LPF characteristic of the PLL loop is the LPF of the first-order lag RC, the damping factor is set to 0.1.
5. Assuming that the natural frequency is 1 kHz, the time ts (called settling time) until the transient response becomes 10% or less of the steady state is obtained as follows. wn × ts = 4.5 ts = 4.5 / (1000 × 2 × PI) = 0.72 ms (4) where the value of [wn × ts = 4.5] is generally normalized. Obtained from the characteristic graph of the transient response of the first-order lag RC system.

However, in the DVD-RAM standard, the period of the address position signal obtained from the disk rotating at the target rotation speed is specified to be about 1.5 ms. This means that the address position signal, which is an input signal of the PLL means, is discrete information, and the address position signal cycle is not much different from the settling time of equation (4) assuming a continuous signal. Therefore, the PLL means 25 is not stable during the settling time of the equation (4). In the case of the discrete signal as described above, it takes 10 or more times as long as Expression (4) until the PLL is stabilized. In a normal motor control state, the rotation speed of the motor fluctuates during a lapse of ten times or more of the settling time in equation (4), so that the PLL means 25 has difficulty reaching a stable state. It takes a lot of time to stabilize.

For this purpose, as shown in FIG.
Once the disk rotation speed is stabilized at a predetermined value between the target rotation speeds of zone N and zone N + 1, in this state, the PLL
By shifting the means 25 to a stable state, the zone N + 1
The recording operation can be performed without reaching the target rotation speed.
After the recording operation is enabled in FIG. 3C, the disk rotation speed is gradually approached to the target rotation speed of the zone N + 1 as long as the recording operation enabled state (for example, within a deviation of about 1%) can be ensured. The setting is repeated to match the target rotation speed of the zone N + 1 shown in FIG.

In this case, the discriminating means 18 constituting the frequency dividing ratio control means 26 compares the output signal of the address position signal detecting means 12 with the output signal of the second frequency dividing means 16 to determine the address position signal detecting means. It is determined whether or not the output signal of Twelve is within a predetermined range of the output signal of the second frequency dividing means 16. That is, if the wavelength of the output signal of the address position signal detecting means 12 is Ta, the wavelength of the output signal of the second frequency dividing means 16 is Tb, and a predetermined range is x, (1-x) Tb <Ta <(1 + x) ) When Tb ‥‥‥ (5) holds, a control signal is output to the division ratio setting means 19 so as to update the division ratio. When the expression (5) is not satisfied, the frequency division ratio setting means 19 does not change. Upon receiving the control signal from the determining means 15, the dividing ratio setting means 19
The frequency dividing ratio of the frequency dividing means 16 is updated within a range in which a recording operable state (for example, within a deviation of about 1%) can be ensured.

The discriminating means 15 compares the wavelength of the output signal of the address position signal detecting means 12 with the wavelength of the output signal of the second frequency dividing means 16 to determine whether the recording operation is possible (for example, about 1% deviation). If the transfer is within the range, a signal for notifying the recording / reproduction signal generation means 3 that the recording operation is possible is output. Note that the above-described second frequency dividing means 16 is provided with the discriminating means 1.
After waiting for a predetermined time after receiving the control signal from the control unit 5, the frequency division ratio of the second frequency dividing means 16 is updated within a range in which a recording operable state (for example, within a deviation of about 1%) can be ensured. The same effect can be obtained.

Similarly, the PLL means 25 includes a reproduced clock extracting means 4, a phase comparing means 5, a second LPF 6, a frequency comparing means 7, a first LPF 8, an adding means 9, and a VCO means 1.
0, the first frequency dividing means 11, but the same effect can be obtained by the frequency comparing means 7, the first LPF 8, the VCO means 10, and the first frequency dividing means 11. (Embodiment 2) Hereinafter, Embodiment 2 of the present invention will be described with reference to the drawings.

FIG. 4 is a block diagram showing a second embodiment of the disk recording / reproducing apparatus of the present invention. In FIG. 4, 1 is a motor, 2 is a disk, 3 is a recording / reproducing signal generating means, 4 is a reproducing clock extracting means, 5 is a phase comparing means,
6 is a second LPF, 7 is a frequency comparing means, and 8 is a first LF.
PF, 9 are adding means, 10 is VCO means, 11 is first frequency dividing means, 12 is address position signal detecting means, 15 is reference signal generating means, 16 is second frequency dividing means, and 17 is motor control means. , 18 are determination means, 19 is a division ratio setting means, 2
Reference numeral 0 denotes a position information discriminating unit, reference numeral 25 denotes a block of a PLL unit, and reference numeral 27 denotes a block of a division ratio control unit based on position.

The operation of the block of the disk recording / reproducing apparatus configured as described above will be described below.
The second embodiment is the same as the first embodiment except that the division ratio control unit 26 of the first embodiment described above is replaced by a division ratio control unit 27 based on position. Therefore, the following description focuses on the division ratio control means 27 depending on the position.

When a recording operation is performed in a state where the motor 1 on which the disk 2 is mounted is rotating at a predetermined target number of revolutions, the signal recorded on the disk 2 is reproduced by the recording / reproduction signal generating means 3. The output of the recording / reproducing signal generating means 3 is input to a reproducing clock extracting means 4 and an address position signal detecting means 12, and the reproducing clock extracting means 4 records the data in an address area and outputs it to a phase comparing means 5, and outputs the address position signal. The detecting means 6 outputs an address position signal indicating the address position to the frequency comparing means 7, the motor control means 17, and the division ratio control means block 26.

Using the reproduced bit clock extracted by the reproduced clock extracting means 4 and the address position signal generated by the address position signal detecting means 7, the PLL means 25 causes the recording / reproducing signal generating means 3 to generate a bit clock for recording. A signal used as a signal is generated and output to the recording / reproducing signal generating means 3. The reference signal generated by the reference signal generating means 15 is frequency-divided by the second frequency dividing means 16 and input to the motor control means 17 and the discriminating means 18. The motor control means 17
Using the output signal of the address position signal detecting means 12 and the output signal of the second frequency dividing means 16, the output signal of the address position signal detecting means 12 is changed to the output signal of the second frequency dividing means 16 in a phase control state. A control signal for controlling the rotation of the motor 1 linked to the disk 2 is generated so that
Output to

The determining means 18 compares the wavelength of the output signal of the address position signal detecting means 12 with the wavelength of the output signal of the second frequency dividing means 16, and the difference between the wavelengths of the two output signals is within a certain range. It determines whether or not this is the case, and outputs the result of determination to the recording / reproducing signal generation means 3. The recording / reproducing signal generation means 3 determines that the result of the determination of the output signal of the determination means 18 is within a certain range (recording
If K) is shown, the recording operation is recognized and the recording operation is executed. Conversely, if the result of the determination by the determination means 18 indicates a value outside the predetermined range (recording NG), it is determined that the recording operation is not possible, and the recording wait state is maintained.

The position information discriminating means 20 detects the recording / reproducing position from the address information of the output signal of the recording / reproducing signal generating means 3 and outputs it to the frequency division ratio setting means 19. The division ratio setting unit 19 controls the division ratio setting unit 1 so that the target rotation speed of the disk according to the position information from the position information discrimination unit 20 is obtained.
9 is controlled. With such a configuration, a case where the recording / reproducing position moves from zone N to zone N + 1 as shown in FIG. Recording / reproducing position is from zone N to zone N
If the position information determining means 20 has moved to +1
Is determined to have moved to zone N + 1. At that time,
The target rotational speed of the disc changes discontinuously from FIG. 3A showing the state of the zone N area to FIG. 3B showing the state where the disk has entered zone N + 1. Similarly, the frequency of the reproduction address position signal becomes relatively large because the rotation speed of the disk is higher than the target rotation speed of the new zone, and the control state of the PLL transits to a transient state.

In the state shown in FIG. 3B, the second frequency dividing means 16 sets the frequency dividing ratio by setting a predetermined value between the target rotation speeds of the zone N and the zone N + 1 as an initial value. The target number of revolutions of the zone N + 1 is a value corresponding to the above-mentioned initial frequency dividing ratio set value of the second frequency dividing means 16. In this state, until the PLL means 25 is in a stable state and the disk rotation speed matches the value corresponding to the initial value of the frequency division ratio setting value (the state of FIG. 3 (c)), the second The value of the initial setting value of the frequency dividing means 16 does not change.

As shown in FIG. 3C, the discriminating means 18 determines that the PLL means 25 is in a stable state and that the number of revolutions of the disk coincides with the value corresponding to the initial value of the dividing ratio set value. Is detected thereafter, the position-based frequency dividing ratio control means 27 controls the set value of the frequency dividing ratio of the second frequency dividing means 16 to gradually increase the disk rotational speed to the target rotational speed of the zone N + 1. And finally match the target rotational speed of the disk in zone N + 1. (From (d) in FIG. 3) As described above, even in the configuration in which the division ratio control unit 26 is changed to the division ratio control unit 27 according to the position in the first embodiment, when recording is continuously performed in zones having different rotation speeds, The effect that the recording of the information on the disk can be started from the state where the rotation number of the disk has not reached the target rotation number in the new zone is similarly obtained.

In the above, the PLL means 25 includes the reproduced clock extracting means 4, the phase comparing means 5, the second LPF 6, the frequency comparing means 7, the first LPF 8, the adding means 9, the VCO
Although the configuration is made up of the means 10 and the first frequency dividing means 11, the same effect can be obtained by the configuration of the frequency comparing means 7, the first LPF 8, the VCO means 10, and the first frequency dividing means 11.

[0047]

As described above, according to the present invention, when recording is continuously performed in zones having different target rotation speeds, the waiting time until recording on the disk is greatly reduced, and the responsiveness of the recording operation is improved. This has the advantageous effect of causing

[Brief description of the drawings]

FIG. 1 is a block diagram of a disk recording / reproducing apparatus according to Embodiment 1 of the present invention.

FIG. 2 is a diagram for explaining the operation.

FIG. 3 is a diagram for explaining the operation.

FIG. 4 is a block diagram of a disk recording / reproducing apparatus according to Embodiment 2 of the present invention.

FIG. 5 is a block diagram of a conventional disk recording / reproducing apparatus.

FIG. 6 is a diagram for explaining the operation.

[Explanation of symbols]

 3 Recording / reproducing signal generating means 15 Reference signal generating means 16 Second frequency dividing means 17 Motor control means 25 PLL means 26 Frequency dividing ratio controlling means 27 Frequency dividing ratio controlling means by position 30 Rotation state determining means

Claims (8)

[Claims] 1. An address position signal detecting means for detecting an address position signal recorded on a disk when recording on a disk, an output signal of the address position signal detecting means and an output signal of a first frequency dividing means. Frequency comparing means for comparing the frequency with the first frequency, and the output of the frequency comparing means as a first
To the input of the VCO means through the LPF of
PLL means configured to obtain an output signal from the O means and to input the output signal of the VCO means to the first frequency dividing means; reference signal generating means for generating a reference signal; Second frequency dividing means for dividing the output; motor control means for controlling a motor using an output signal of the address position signal detecting means and an output signal of the second frequency dividing means; A frequency division ratio control means for outputting a control signal for controlling the setting of the frequency division ratio of the second frequency division means using the output signal of the signal detection means and the output signal of the second frequency division means; The above P
A disk recording / reproducing apparatus characterized in that an output signal of a VCO means constituting an LL means is used as a clock signal used for recording. 2. A reproduction means for extracting a reproduction clock signal recorded at an address position from a reproduction signal of a disk in a PLL means, an output signal of the reproduction clock extraction means, and a VCO means constituting the PLL means. Phase comparison means for comparing the phase difference with the output signal of the first and second signals, addition means for adding the signal obtained by the output of the phase comparison means through the second LPF and the output signal of the first LPF, 2. A disk recording / reproducing apparatus according to claim 1, wherein an output signal of said means is inputted to said VCO means. 3. The dividing ratio setting means determines whether the wavelength of the output signal of the address position signal detecting means is within a predetermined range based on the wavelength of the output signal of the second dividing means. 2. The disk recording / reproducing apparatus according to claim 1, further comprising: a judging means for outputting; and a frequency division ratio setting control means for controlling a set value of the frequency division ratio in accordance with a result of said judgment means. 4. The division ratio control means, if the wavelength of the output signal of the address position signal detection means is within a predetermined range based on the wavelength of the output signal of the second frequency division means, up to a final target value. 2. The disk recording / reproducing apparatus according to claim 1, wherein the frequency division ratio is changed at a predetermined ratio every predetermined time. 5. An address position signal detecting means for detecting an address position signal recorded on a disk when recording on a disk, an output signal of the address position signal detecting means and an output signal of the first frequency dividing means. Frequency comparing means for comparing the frequency with the first frequency, and the output of the frequency comparing means as a first
To the input of the VCO means through the LPF of
PLL means configured to obtain an output signal from the O means and to input the output signal of the VCO means to the first frequency dividing means; reference signal generating means for generating a reference signal; Second frequency dividing means for dividing the output; motor control means for controlling a motor using the output signal of the address position signal detecting means and the output signal of the second frequency dividing means; A dividing ratio control unit for setting a dividing ratio of the second dividing unit on the basis of the information of the number and the reproducing position; A disk recording / reproducing device characterized by being used as a signal. 6. The frequency division ratio control means detects the recording / reproducing address using information obtained by the recording / reproducing signal generating means, and determines the area to be recorded from the detected address. It is obtained by judging,
6. The disk recording / reproducing apparatus according to claim 5, wherein the frequency dividing ratio of the second frequency dividing means is set according to the result of the determination. 7. The frequency division ratio control means stores information of an address and a target rotation speed of a disk in a storage element in advance, and searches the storage element using the detected address to determine an area. 7. The method according to claim 6, wherein
Disc recording / reproducing apparatus according to the above. 8. In the frequency division ratio control means, if a wavelength of an output signal of the address position signal detection means is within a predetermined range based on a wavelength of an output signal of the second frequency division means, a recording operation is performed. 2. The apparatus according to claim 1, wherein the determination signal is output to a block that performs a recording operation.
Alternatively, the disk recording / reproducing apparatus according to claim 5.