JP2006190399A - Dubbing system and dubbing method for optical disk drive, spindle motor controller, and output rate controller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spindle motor controller which can reduce the dubbing time when dubbing from a CD player to an MD player without suspending the writing in the memory. <P>SOLUTION: The spindle motor controller has a memory 16 and a memory controller 13, an output signal generator 17, and an address difference based spindle motor controller 32, and can output the optical disk reproduction signals at a constant transfer speed without jitters caused by uneven revolutions of the disk. The output rate controller controls the output rate by referencing the difference data between the write address and the read address in the memory and can make stabilized data transfer without overflowing or underflowing even when the memory capacity is small. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an optical disk device dubbing system, an optical disk device dubbing method, a spindle motor control device, and an output rate control device.

  In particular, by improving the spindle motor control device in an optical disk device such as a CD player, CD-ROM drive, DVD player, DVD-ROM drive, MD player, etc., and an output rate control device whose output signal is subject to digital dubbing. The present invention relates to an optical disc apparatus that can achieve high dubbing speed.

Conventionally, optical discs, such as CDs, on which music data and the like are recorded have been widely used.
A music CD disc records uncompressed music data, but a disc containing a large number of songs has a diameter of 12 cm. On the other hand, since the MD disc is compressed and recorded to a capacity of about 1/5 of the original sound by the ATRAC (Adaptive Transform Acoustic Coding) method, the contents of a 12 cm CD can be accommodated in a smaller MD disc. For this reason, the contents of CD discs are often carried digitally by dubbing them onto MD discs.

FIG. 19 shows a system component stereo which is an example of an audio device capable of such digital dubbing.
In the figure, the system component stereo CMP is equipped with a CD player and an MD deck (hereinafter referred to as an MD player) having a recording function. By pressing the eject button in the key KY, the CD tray CDT is opened, and the CD disc is taken out from the case and set. The MD disc is set in the MD player via the slot MDS.

  Although dubbing from the CD disc to the MD disc by the key KY operation may be selected to be performed at the standard speed, that is, 1 × speed, it takes 74 minutes, so an audio device having this type of dubbing function has 4 × speed. In many cases, a high-speed dubbing function such as the above is installed. Speakers SP1 and SP2 play a reproduction sound when reproducing a CD or MD.

  FIG. 20 shows a schematic block configuration of this type of system component stereo. In the figure, a CD drive 401 and an MD drive 402 form the core part of a CD player and an MD player. The system controller 1100 controls the CD controller 55 in response to the key KY operation in FIG. The CD control unit 55 performs the dubbing by controlling the CD drive 401 and outputting the reproduction data to the MD drive 402.

  FIG. 21 shows the configuration of the system controller 1100 and the CD controller 55. In the figure, a key input detection unit 1101 in the system controller 1100 detects a key KY input. A high speed dubbing key operation detection unit 1102 detects whether or not the key operation is a high speed dubbing key. The spindle motor control signal setting unit 1103 sets a control signal so that the spindle motor rotates at a predetermined double speed rotation when the high speed dubbing key is operated. A spindle motor rotation control unit 551 in the CD control unit 55 controls the rotation of the spindle motor in accordance with a spindle motor control signal.

FIG. 22 shows the rotational speed of the spindle motor of the CD player in this conventional high speed dubbing mode.
Here, it is assumed that a standard 74 minute recording is performed on the CD disc. The spindle motor always rotates at 5 times the standard playback speed from 0 minutes at the start of CD playback to 74 minutes at the end of playback. As a result, it is possible to reduce the time required for completing the dubbing of one CD to the MD as compared with the case where the dubbing is performed at the standard speed, that is, the 1 × speed.

FIG. 23 shows a more detailed conceptual diagram of a conventional CD system when digitally dubbing a CD disc. This CD system corresponds to the CD controller in FIG.
The conventional CD system 160 shown in FIG. 23 includes a PLL 161 that reproduces a clock from data reproduced by an optical pickup 41 that reads information recorded on an optical disk D such as a CD, and a demodulator / corrector of reproduced data from the optical pickup 41. A signal processor 162 for performing error correction, a memory controller 163 for controlling writing / reading of error-corrected data to / from the shock proof memory 164, and a D / A converter 165 for converting data read by the memory controller 163 into analog data. And a serial output signal generation unit 166 that generates serial data from the data error-corrected by the signal processing unit 162.

  Further, the signal processing unit 162 generates a clock corresponding to the phase difference between the write data to the CIRCRAM 1622 and the read data, and a write system 1621 for writing data to the CIRCRAM (CIRC; Cross Interleaved Reed-Solomon Code) 1622. A read system 1625 for reading data from the PLL 1623 and the CIRCRAM 1622, and a selector 1624 for switching a clock to the read system 1625 from an external crystal clock and an output clock of the PLL 1623 by a jitter-free setting from the system controller 1100. The crystal clock is a clock signal oscillated by a crystal oscillator.

  Next, the operation will be described. The optical pickup 41 reads and reproduces data recorded on the signal surface of the optical disc D. Even when the input rate of the signal obtained from the optical disk D is not constant due to the rotation unevenness of the optical disk D, the music data binarized by the DSL (Data Slice) PLL unit 1623 and the clock synchronized with the rotation are transmitted from the optical disk. Is obtained as the reproduction signal. The binarized music data is demodulated and corrected by the signal processing unit 162. Data writing to the CIRCRAM 1622 used for correction is performed by the writing system 1621. This writing is synchronized with the input rate by the PLL 1623. Therefore, error correction can be performed in a so-called jitter-free state that is not affected by jitter. For reading from the CIRCRAM 1622, the oscillation signal of the analog PLL 1623 is used as a clock for the read system 1625. In the case where the reproduction is simply performed without performing the dubbing from the CD disk to the MD disk, the jitter free setting can be turned off by setting the selector 1624 to OFF by a control unit (not shown). In this case, the readout system 1625 is operated by an external crystal clock input.

  The demodulated and corrected music data is temporarily stored in the shock proof memory 164 by the memory controller 163. Therefore, even if the optical pickup is off track due to physical vibration applied from the outside of the apparatus, the tracking control is performed so that the optical pickup returns to the original track within the time determined by the storage capacity of the shock proof memory 164. And reproducing the original track again, it is possible to perform the reproduction without any trouble and to realize a strong vibration resistance. The data read from the shock proof memory 164 is converted into an analog audio output by the D / A converter 165 and reproduced by a speaker, an earphone or the like. Further, the serial output signal generation unit 166 changes the output of the signal processing unit 162 to a predetermined format at a rate synchronized with the rotation of the optical disc and outputs it to the MD deck.

  As described above, when reproducing an optical disk such as a CD, the spindle motor is controlled by CLV (Constant Linear Velocity) so that the linear velocity is constant, and the obtained reproduction signal is demodulated / corrected by the signal processing unit, and then temporarily stored in the memory. For example, by writing to a dynamic random access memory (DRAM), storing data for a certain period, and then reading the stored data from the memory, even if there is an abnormality in the playback signal from the optical disk due to vibrations, etc. It is possible to avoid the influence.

FIG. 24 shows the configuration of a conventional CD system that performs recovery when servo detachment occurs.
In FIG. 24, the demodulation (correction) unit 11 corresponds to the signal processing unit 162 in FIG. The servo deviation detection unit 14 detects whether or not servo deviation has occurred depending on whether or not a frame synchronization signal is included in the reproduction signal from the optical pickup 41. When servo out is detected, the selector 53 selects a fixed value from the fixed value output unit 21 based on the servo out signal 38 and outputs it to the spindle motor 37 as its control signal. Thereby, acceleration is suppressed rather than selecting a control signal from the CLV control unit 20, and the servo can be easily pulled.

By the way, the above-described conventional optical disc reproducing apparatus performs a process of stopping writing to the memory when the remaining amount of the memory is equal to or more than a specified value (for example, see Patent Document 1).
Further, in this conventional example, even when data transfer is performed at a high speed, the optical disk is played back by CLV playback with a constant linear velocity, and the data is transferred.

Further, when the rotation speed of the spindle motor is constant and the input data rate is not constant, the reproduction signal read from the shock proof memory is operated to switch the output rate from the outside such as a microcomputer (for example, Patent Document 2). reference).
Japanese Patent Laid-Open No. 5-128531 (pages 4-8, FIGS. 1-3) Japanese Patent Laid-Open No. 6-314170 (page 3 to page 4, FIGS. 1 to 3)

  By the way, the reproduction signal obtained from the optical disk with a constant linear velocity as described above has jitter due to rotation control error. For example, when dubbing from a CD player to an MD player at high speed, dubbing is performed. In order not to exceed the maximum operating speed of the recording side, it is necessary to keep the rotational speed of the reproducing side low for the jitter margin, and the dubbing time cannot be sufficiently increased.

  For example, in the case of CLV control, the spindle motor of a CD player of a component audio device can rotate at 5 × speed on the inner circumference side of the optical disc and 7-8 times on the outer circumference side, but the limit of the dubbing speed on the receiving side is limited. Because of the value, the rotational speed must be suppressed to, for example, 5 times speed on the outer peripheral side. Therefore, high-speed dubbing has to be executed at a speed that is lower than the maximum speed that can be originally expected, which requires much time.

  Further, when the process of stopping writing due to the remaining amount of memory is performed, it is necessary to make the optical pickup track jump to the reading position of the optical disk, which causes a reduction in the quality of the reproduction signal.

  The present invention has been made in order to solve the above-described problems of the prior art, and it is an object of the present invention to provide a spindle motor control device which aims to shorten the dubbing time and not stop the memory writing. It is said.

  Also, as described above, when data transfer is performed at a high speed, if playback is performed at a CLV with a constant linear velocity, and playback is attempted at the limit speed of the spindle motor, the output rate will change to the MD side due to the influence of jitter. The encoder's processing capability is exceeded, and the encoder's processing will fail. For this reason, reproduction cannot be performed at the limit rotational speed of the spindle motor, and dubbing takes much time when performing dubbing or the like.

  Also, when playing back an optical disk at the limit of the number of revolutions of the spindle motor, if the memory capacity is small and playback is performed at high speed, the memory may overflow or underflow if the output signal rate is controlled externally. It often ends up.

  The present invention has been made in order to solve the above-described problems of the prior art, and an output rate control device that does not require an analog PLL section and enables stable data transfer of a reproduced signal even at high speed. It is intended to provide.

  Further, when dubbing data from an optical disk device to a receiving device having a limit on the dubbing speed, the dubbing system of the optical disk device can speed up the dubbing even when reproducing either the inner or outer peripheral side of the optical disk. And to provide a dubbing method.

In order to solve the above problem,
A dubbing system for an optical disc apparatus according to claim 1 of the present invention comprises: an optical disc device that reproduces an optical disc; and a receiving side device that has a dubbing speed limit and dubbed data reproduced by the optical disc device, In a dubbing system for an optical disc apparatus that performs dubbing of data between the optical disc apparatus and the receiving device, when the optical disc device reproduces the outer periphery side of the optical disc, the optical disc does not exceed the allowable double speed of the receiving device. A rotation speed setting unit that sets the rotation speed of a spindle motor that rotates the optical disc, a jitter absorption unit that absorbs jitter caused by rotation of the spindle motor on the outer peripheral side of the optical disc, and the optical disc apparatus has an inner circumference of the optical disc. Of the dubbing speed of the receiving device So as not to exceed the field, it is characterized in that an output rate controlling unit for controlling the output rate of the optical disk apparatus.

  An optical disk device dubbing system according to claim 2 of the present invention is the optical disk device dubbing system according to claim 1, wherein the optical disk device is a CD drive and the receiving device is an MD drive. To do.

  A dubbing system for an optical disc apparatus according to a third aspect of the present invention is the optical disc apparatus dubbing system according to the first aspect, wherein the spindle motor is rotationally controlled so as to have a constant linear velocity (hereinafter referred to as CLV). It is characterized by that.

  According to a fourth aspect of the present invention, there is provided an optical disc apparatus dubbing method comprising: an optical disc apparatus that reproduces an optical disc; and a receiving side device that has a dubbing speed limit and to which data reproduced by the optical disc apparatus is dubbed; In a dubbing method for an optical disc apparatus in which data is dubbed between the optical disc apparatus and the receiving device, when the optical disc device reproduces the inner circumference side of the optical disc, the dubbing speed limit of the receiving device is not exceeded. The output rate of the optical disk device is controlled, and when the optical disk device reproduces the outer peripheral side of the optical disk, the rotation speed of the spindle motor that rotates the optical disk is set so as not to exceed the allowable double speed of the receiving device. , To absorb the jitter caused by the rotation of the spindle motor on the outer peripheral side It is an butterfly.

  A spindle motor control device according to a fifth aspect of the present invention is a spindle motor control device for an optical disk apparatus, wherein a memory for writing an optical disk reproduction signal demodulated by an optical pickup, and a memory controller for controlling writing to and reading from the memory An address difference spindle motor control unit that generates a spindle motor control signal by referring to an address difference between a write address and a read address of the memory controller, and converts read data read from the memory into output data And an output signal generation unit.

  A spindle motor control device according to a sixth aspect of the present invention is the spindle motor control device according to the fifth aspect, wherein the address difference spindle motor control unit includes the address difference and a target address difference which is a target value of the address difference. A phase control unit that generates a phase difference signal according to a difference between the address difference, an address difference held in a memory that holds the address difference, and a speed control unit that generates a speed signal according to the difference between the address difference, And a result obtained by calculating the phase difference signal and the velocity signal is output as a control signal for the spindle motor.

  A spindle motor control device according to a seventh aspect of the present invention is the spindle motor control device according to the fifth aspect, further comprising a reversible compression / decompression unit for reversibly compressing / decompressing write data and read data to the memory. It is a feature.

  A spindle motor control device according to an eighth aspect of the present invention is the spindle motor control device according to any one of the fifth to seventh aspects, wherein the memory is applied to the optical disc device by a physical impact applied to the optical disc device. It is a memory for shock proof that alleviates the non-uniform reproduction that occurs.

  A spindle motor control device according to a ninth aspect of the present invention is the spindle motor control device according to the fifth aspect, wherein a servo failure detection unit that detects that the spindle motor has caused servo failure, and the servo failure detection unit. And a switching unit that switches between the output of the address difference spindle motor control unit and the fixed value output with reference to the servo deviation signal detected in (5).

  A spindle motor control device according to a tenth aspect of the present invention is the spindle motor control device according to the fifth aspect, further comprising a servo failure detection unit that detects that the spindle motor has caused a servo failure, and the address difference The spindle motor control unit is characterized in that the gain is lowered when the servo is out with reference to the servo out signal detected by the servo out detection unit.

  A spindle motor control device according to an eleventh aspect of the present invention is the spindle motor control device according to the tenth aspect, wherein the address difference spindle motor control unit is configured such that a servo outage is not detected by the servo outage detection unit. The gain of the address difference spindle motor control unit is increased for a certain period.

  A spindle motor control device according to a twelfth aspect of the present invention is the spindle motor control device according to the tenth aspect, wherein the address difference spindle motor control unit is configured such that a servo outage is not detected by the servo outage detection unit. The gain of the address difference spindle motor control unit is increased until the address difference falls within a specified range.

  A spindle motor control device according to a thirteenth aspect of the present invention is the spindle motor control device according to the tenth aspect, wherein the address difference spindle motor control unit is configured such that a servo outage is not detected by the servo outage detection unit. The gain of the address difference spindle motor control unit is increased until the polarity of the output of the phase control unit is inverted.

  A spindle motor control device according to a fourteenth aspect of the present invention is the spindle motor control device according to the tenth aspect, further comprising a servo outage detection unit for detecting servo outage, and a servo outage signal detected by the servo outage detection unit. Referring to FIG. 5, the output value of the address difference spindle motor control unit is held.

  A spindle motor control device according to a fifteenth aspect of the present invention is the spindle motor control device according to the fourteenth aspect, wherein the address difference spindle motor control unit increases the gain when the address difference falls outside a specified range. To do.

  A spindle motor control device according to a sixteenth aspect of the present invention is the spindle motor control device according to the fifth aspect, further comprising a CLV control section for controlling the rotation of the spindle motor so that the linear velocity is constant, and the address difference is The output signal of the CLV control unit is used as the spindle motor control signal and the input of the output signal generation unit is switched to the optical disc reproduction signal when the amount is less than a specified amount.

  According to a seventeenth aspect of the present invention, in the spindle motor control device according to the fifth aspect, when the address difference falls within a specified range, the spindle motor control signal is transmitted from the output of the CLV control unit. The output of the difference spindle motor control unit is switched, and the input of the output signal generation unit is switched from the output from the demodulation unit to the output from the memory.

  The spindle motor control device according to claim 18 of the present invention is the spindle motor control device according to claim 5, wherein when the address difference of the address difference spindle motor control unit falls within a specified range, the control frequency of the spindle motor is set. It is characterized by lowering.

  An output rate control apparatus according to a nineteenth aspect of the present invention includes a signal processing unit that demodulates and corrects a reproduction signal read from an optical disc, a memory that writes the reproduction signal demodulated and corrected by the signal processing unit, A memory controller that controls writing to and reading from the memory; and an output signal generation unit that generates a signal for converting the data read from the memory into a predetermined format and outputting the data. Address difference data that is a difference between a write address and a read address in a memory is generated, and the output signal generation unit inputs the address difference data and controls a rate of an output signal.

  The output rate control apparatus according to a twentieth aspect of the present invention is that the signal output from the output signal generation unit includes a control signal that generates a delimiter timing in units of data consisting of a plurality of bits, and a delimiter in units of bits. It is characterized by comprising a bit clock for generating timing and serial data containing valid data in part between the delimiter timings in units of the data.

  An output rate control apparatus according to a twenty-first aspect of the present invention is the output rate control apparatus according to the nineteenth aspect, further comprising a calculation unit that calculates an output rate of the serial data from the address difference data. It is what.

  An output rate control apparatus according to a twenty-second aspect of the present invention is the output rate control apparatus according to the nineteenth aspect, wherein the read address is read to the write address when the address difference data is greater than or less than a certain value. The serial data output rate is calculated so that the address follows, and when the difference data is within a specified range, a calculation unit is further provided to hold the serial data output rate.

  An output rate control apparatus according to a twenty-third aspect of the present invention is the output rate control apparatus according to the nineteenth aspect, wherein the address difference data is integrated for a certain period, the polarity of the difference integration data, and the address difference data In addition, an arithmetic unit that calculates an output rate of the serial data so that the read address follows the write address from the polarity of the write data is further provided.

  An output rate control apparatus according to a twenty-fourth aspect of the present invention is the output rate control apparatus according to the nineteenth aspect, wherein the output rate of the serial data is switched in accordance with a remaining address indicated by the address difference data. It is what.

  In the spindle motor control device according to the present invention, since the read signal from the optical disk including jitter is temporarily stored in the memory and is read out and output with clock synchronization with less jitter, the rotational speed of the optical disk (CD) is lowered by the jitter margin. Therefore, it is possible to output while maintaining the maximum transfer rate.

  Furthermore, since the self-recovery at the time of servo error or memory empty can be performed, it is possible to output the reproduction signal without interruption.

  Further, since the spindle motor control is performed based on the address difference between the write data and the read data in the memory, the motor control frequency is lowered, and the motor can have low power consumption and long life.

  The output rate control device according to the present invention is mainly used for data transfer to the dubbing device, refers to the difference data between the write address and read address of the track buffer memory, automatically calculates the output pitch shift amount as needed, and transfers the data. Therefore, even when the memory capacity is small or the playback data is at high speed, the memory does not overflow or underflow, it can be rotated to the limit of the spindle motor, and dubbing in a shorter time is possible. is there.

  That is, according to the dubbing system of the optical disc apparatus according to the first aspect of the present invention, the optical disc apparatus that reproduces the optical disc, and the receiving side device that has a dubbing speed limit and to which the data reproduced by the optical disc apparatus is dubbed In the dubbing system of the optical disc apparatus that performs dubbing of data between the optical disc apparatus and the receiving device, when the optical disc device reproduces the outer peripheral side of the optical disc, the optical disc is allowed to be doubled by the receiving device. The rotation speed setting section for setting the rotation speed of the spindle motor that rotates the optical disc so as not to exceed the above, the jitter absorption section that absorbs jitter caused by the rotation of the spindle motor on the outer peripheral side of the optical disc, and the optical disc apparatus When playing back the inner circumference side of the optical disc, Since the output rate control unit for controlling the output rate of the optical disc apparatus is provided so as not to exceed the limit of the dubbing speed, the outer peripheral side of the optical disc is reproduced when dubbing from the optical disc apparatus to the receiving side device. In this case, the rotation speed can be set as high as possible, the data can be transferred at the upper limit output rate that does not exceed the limit of the dubbing speed of the receiving device on the inner circumference side, and the data can be dubbed at a higher speed. .

  According to a dubbing system for an optical disc apparatus according to a second aspect of the present invention, in the dubbing system for an optical disc apparatus according to the first aspect, the optical disc apparatus is a CD drive and the receiving side apparatus is an MD drive. Therefore, there is an effect that it is possible to further speed up the dubbing from the CD disc to the MD disc.

  According to a dubbing system for an optical disc apparatus according to a third aspect of the present invention, in the optical disc apparatus dubbing system according to the first aspect, the spindle motor has a constant linear velocity (hereinafter referred to as CLV). Therefore, it is possible to increase the rotation speed of the first optical disk whose outer peripheral side rotates faster than the inner peripheral side in each region on the inner peripheral side and the outer peripheral side. There is an effect that it is possible to realize further high-speed dubbing.

  According to a dubbing method for an optical disc apparatus according to a fourth aspect of the present invention, an optical disc apparatus for reproducing an optical disc, a receiving side device having a dubbing speed limit and dubbing data reproduced by the optical disc apparatus, And a dubbing speed limit of the receiving apparatus when the optical disk apparatus reproduces the inner circumference side of the optical disk in the dubbing method of the optical disk apparatus for dubbing data between the optical disk apparatus and the receiving apparatus. The output rate of the optical disk device is controlled so that the optical disk device does not exceed the rotational speed of the spindle motor that rotates the optical disk so that the allowable speed of the receiving device is not exceeded when the optical disk device reproduces the outer peripheral side of the optical disk. Set the number to absorb the jitter caused by the rotation of the spindle motor on the outer periphery. Therefore, when dubbing from the optical disk device to the receiving device, when reproducing the outer peripheral side of the optical disc, it can be set as high as possible, and on the inner peripheral side, the limit of the dubbing speed of the receiving device is exceeded. The data can be transferred at an output rate with no upper limit, and the data can be dubbed at higher speed.

  According to the spindle motor control apparatus of the fifth aspect of the present invention, in the spindle motor control apparatus of the optical disc apparatus, a memory for writing the optical disc reproduction signal demodulated by the optical pickup, and writing / reading to the memory are performed. A memory controller to be controlled, an address difference spindle motor control unit that generates a spindle motor control signal by referring to an address difference between a write address and a read address of the memory controller, and outputs read data read from the memory And an output signal generation unit that converts the data into data, so that the spindle motor is rotated as fast as possible on the outer periphery side of the optical disc, and the spindle motor control device is operated, thereby causing uneven rotation of the spindle motor. Can be absorbed by the memory more resulting jitter, there is an effect that it is possible to play data for dubbing can be stable at a high speed.

  According to a spindle motor control device of a sixth aspect of the present invention, in the spindle motor control device according to the fifth aspect, the address difference spindle motor control unit uses the address difference and a target value of the address difference. A phase control unit that generates a phase difference signal according to a difference from a certain target address difference, an address difference held in a memory that holds the address difference, and a speed signal according to the difference between the address differences A speed control unit, which outputs the result of calculating the phase difference signal and the speed signal as a control signal for the spindle motor, so that the data stored in the memory is not emptied The number can be controlled, and there is an effect that reproduction data for dubbing can be obtained at high speed and stably.

  According to a spindle motor control device of a seventh aspect of the present invention, in the spindle motor control device according to the fifth aspect, the reversible compression / decompression unit for reversibly compressing / decompressing write data and read data to the memory is provided. As a result, it is possible to reduce the memory capacity without deteriorating the data quality before and after writing to or reading from the memory, and to obtain reproduction data for dubbing at high speed and stably. There is an effect.

  According to a spindle motor control device of an eighth aspect of the present invention, in the spindle motor control device according to any one of the fifth to seventh aspects, the memory is caused by a physical impact applied to the optical disc device. Since it is a memory for shock proof that alleviates the reproduction unevenness that occurs in the optical disk device, the reproduction unevenness caused by the physical shock and the deterioration of the reproduction quality due to the rotation unevenness can be removed at the same time and at a low cost. There is an effect that the reproduction data can be obtained at high speed and stably without interruption.

  According to a spindle motor control device of a ninth aspect of the present invention, in the spindle motor control device according to the fifth aspect of the invention, a servo failure detection unit that detects that the spindle motor has caused servo failure; A switching unit that switches between the output of the address difference spindle motor control unit and the fixed value output with reference to the servo out signal detected by the servo out detection unit is further provided. Thus, there is an effect that it is possible to obtain the reproduction data for use at high speed and stably without interruption.

  According to a spindle motor control device of a tenth aspect of the present invention, in the spindle motor control device according to the fifth aspect of the present invention, the spindle motor control device further includes a servo deviation detection unit that detects that the spindle motor has caused a servo deviation. The address difference spindle motor control unit refers to the servo out signal detected by the servo out detection unit so as to decrease the gain when the servo is out, so that even if the servo out occurs, it can be recovered quickly. As a result, reproduction data for dubbing can be obtained quickly and stably without interruption.

  According to a spindle motor control device of an eleventh aspect of the present invention, in the spindle motor control device according to the tenth aspect, the address difference spindle motor control unit detects that the servo deviation has not been detected by the servo deviation detection unit. Since the gain of the address difference spindle motor control unit is increased for a certain period of time, the reproduction data for dubbing can be restored to a state where it can be obtained quickly and stably without interruption. is there.

  According to a spindle motor control device of a twelfth aspect of the present invention, in the spindle motor control device according to the tenth aspect, the address difference spindle motor control unit detects that the servo deviation has not been detected by the servo deviation detection unit. After that, until the address difference falls within the specified range, the gain of the address difference spindle motor control unit is increased, so that the playback data for dubbing can be obtained quickly and stably without interruption. There is an effect that can be done.

  According to a spindle motor control device of a thirteenth aspect of the present invention, in the spindle motor control device according to the tenth aspect, the address difference spindle motor control unit has not detected a servo outage in the servo outage detection unit. Since the gain of the address difference spindle motor control unit is increased until the polarity of the output of the phase control unit is reversed, reproduction data for dubbing can be obtained quickly and stably without interruption. There is an effect that it is possible to return to the state.

  According to a spindle motor control device of a fourteenth aspect of the present invention, in the spindle motor control device according to the tenth aspect of the present invention, the spindle motor control device further includes a servo deviation detection unit that detects servo deviation, and the servo deviation detection unit detects the servo deviation detection unit. Since the output value of the address difference spindle motor control unit is held by referring to the servo-off signal, the reproduction data for dubbing can be restored to a state where it can be obtained quickly and stably without interruption. There is a possible effect.

  According to a spindle motor control device of a fifteenth aspect of the present invention, in the spindle motor control device according to the fourteenth aspect, the address difference spindle motor control unit increases the gain when the address difference falls outside a specified range. Thus, there is an effect that it is possible to return the dubbed reproduction data to a state where it can be obtained stably at high speed without interruption.

  According to a spindle motor control device of a sixteenth aspect of the present invention, the spindle motor control device according to the fifth aspect further includes a CLV control unit that controls the rotation of the spindle motor so that the linear velocity is constant. Since the output signal of the CLV control unit is used as the spindle motor control signal and the input of the output signal generation unit is switched to the optical disc reproduction signal when the address difference becomes less than a specified amount, The rotational speed of the optical disk can be controlled so that the data stored in the memory is not emptied, and dubbing reproduction data can be restored to a state where it can be obtained quickly and stably without interruption. .

  According to a spindle motor control device of a seventeenth aspect of the present invention, in the spindle motor control device according to the fifth aspect, when the address difference falls within a specified range, the spindle motor control signal is sent to the CLV control unit. The output of the output signal generator is switched to the output of the address difference spindle motor control unit, and the input of the output signal generation unit is switched from the output from the demodulation unit to the output from the memory. There is an effect that it is possible to return to a state where the reproduction data for dubbing can be obtained at high speed and stably without interruption after the state where the loss can occur is eliminated.

  According to a spindle motor control device of an eighteenth aspect of the present invention, in the spindle motor control device according to the fifth aspect, when the address difference of the address difference spindle motor control unit falls within a specified range, the spindle motor Since the control frequency of the spindle motor is lowered, there is an effect that it is possible to realize low power consumption and long life of the spindle motor.

  According to the output rate control apparatus of the nineteenth aspect of the present invention, the signal processing unit for demodulating / correcting the reproduction signal read from the optical disc, and the reproduction signal demodulated / corrected by the signal processing unit are written. A memory, a memory controller that controls writing to and reading from the memory, and an output signal generation unit that generates a signal for converting the data read from the memory into a predetermined format and outputting the data. The controller generates address difference data that is a difference between a write address and a read address to the memory, and the output signal generation unit inputs the address difference data and controls the rate of the output signal. The optical disk is rotated at high speed on the inner circumference side of the optical disk, and the receiving side of the output signal has a limit on the dubbing speed. Output rate can be suppressed so that the output rate does not exceed the limit of the dubbing speed, and the maximum output rate that does not exceed the limit of the dubbing speed on the receiving side while ensuring the reading speed of the optical disc. There is an effect that can be obtained.

  According to the output rate control apparatus of the twentieth aspect of the present invention, in the output rate control apparatus of the nineteenth aspect, the signal output from the output signal generation unit is a unit of data consisting of a plurality of bits. A control signal for generating a delimiter timing, a bit clock for generating a delimiter timing in units of bits, and serial data containing valid data in part between the delimiter timings in units of the data Therefore, it is possible to change the output rate appropriately by expanding / contracting the part other than the part that contains valid data, and the upper limit output rate that does not exceed the limit of the dubbing speed on the receiving side while ensuring the reading speed of the optical disc There is an effect that can be obtained.

  According to an output rate control apparatus of a twenty-first aspect of the present invention, the output rate control apparatus of the nineteenth aspect further includes a calculation unit that calculates an output rate of the serial data from the address difference data. As a result, when the optical disk is rotated at high speed on the inner circumference side of the optical disk and the receiving side of the output signal has a limit on the dubbing speed, the output rate is set so that the output rate does not exceed the limit of the dubbing speed. Thus, it is possible to obtain an upper limit output rate that does not exceed the limit of the receiving side dubbing speed while ensuring the reading speed of the optical disc.

  According to an output rate control apparatus of a twenty-second aspect of the present invention, in the output rate control apparatus of the nineteenth aspect, when the address difference data is greater than or less than a certain value, the write address is Since an output rate of the serial data is calculated so that the read address follows, and when the difference data is within a specified range, a calculation unit that holds the output rate of the serial data is further provided. When the optical disk is rotated at high speed on the circumferential side and the receiving side of the output signal has a limit on the dubbing speed, the output rate can be suppressed so that the output rate does not exceed the limit of the dubbing speed. While ensuring the reading speed, the maximum output rate that does not exceed the limit of the dubbing speed on the receiving side There is an effect that it is possible to Rukoto.

  According to an output rate control apparatus of a twenty-third aspect of the present invention, in the output rate control apparatus of the nineteenth aspect, the address difference data is integrated for a certain period, and the polarity of the difference integration data is Since an arithmetic unit for calculating the output rate of the serial data so as to follow the write address from the polarity of the address difference data is further provided, the optical disk is rotated at high speed on the inner circumference side of the optical disk. When the receiving side of the output signal has a limit on the dubbing speed, the output rate can be suppressed so that the output rate does not exceed the limit of the dubbing speed. The effect that it becomes possible to obtain the maximum output rate that does not exceed the limit of the dubbing speed on the side A.

  Furthermore, according to the output rate control apparatus of a twenty-fourth aspect of the present invention, in the output rate control apparatus according to the nineteenth aspect, the output rate of the serial data is set in accordance with the address remaining amount indicated by the address difference data. Since the optical disk is rotated at high speed on the inner circumference side of the optical disk and the output signal receiving side has a limit on the dubbing speed, the output rate is set so that the output rate does not exceed the limit of the dubbing speed. As a result, it is possible to obtain an upper limit output rate that does not exceed the limit of the receiving side dubbing speed while ensuring the reading speed of the optical disc.

(Embodiment 1)
The present invention dubbes data from a CD player (optical disc apparatus) that controls the rotation of an optical disc by CLV control and reproduces it to an MD player (receiving device) that has a dubbing speed limit to perform data compression processing during recording. In this situation, when the CD player reproduces the optical disk, the outer peripheral side can be speeded up by the spindle motor control device, and the inner speed side can be speeded up by the output rate control device.

  In this case, the configurations of the system controller 1000 and the CD controller 50 of the system component stereo corresponding to the dubbing system of the optical disc apparatus are as shown in FIG.

  A key input detection unit 1001 in the system controller 1000 detects that there is a key KY input. The high speed dubbing key operation detection unit 1102 detects whether or not the operated key is a high speed dubbing key (see step 110 in FIG. 7). The dubbing range determination unit 1003 determines whether the dubbing range is the whole or a part of the CD by key input (see step 111). The control switching unit 1004 determines whether the playback position of the CD during high-speed dubbing corresponds to the inner or outer peripheral side of the disc (see step 101 in FIG. 4 and step 112 in FIG. 7). If it corresponds, the inner periphery side control unit 501 is operated (see step 102 in FIG. 4), and if it corresponds to the outer periphery side, the outer periphery side control unit 502 is operated (see step 103). The inner peripheral control unit 501 corresponds to an output rate control device, and the outer peripheral control unit 502 corresponds to a spindle motor control device. The determination between the inner peripheral side and the outer peripheral side uses the subcode SC shown in FIG. This subcode is reproduced from the CD, and the elapsed time from the beginning of the first song to the current reproduction position is expressed in minutes, seconds, and frames f (= 1/30 seconds).

  That is, as shown in FIG. 6, the spindle motor control device controls the spindle motor so as to increase the rotational speed to near the upper limit of the rotational speed on the outer peripheral side of the optical disk reproduced by the CD player, and the jitter at that time is controlled. The impact is absorbed by the memory for shock proof, and the output rate control device does not cause a failure in the data compression processing of the MD player by adding jitter to the high rotation when reproducing the inner circumference side of the CD player. In addition, by controlling the output rate, the rotation speed of the CD player can be maintained as close as possible to the maximum rotation speed on the inner and outer peripheral sides of the optical disc, and dubbing speed can be increased. is there.

  This point will be described in more detail. In Steps 112 and 116 of FIG. 7, it is determined that the inner periphery side is to be played, and when playback is started from the innermost periphery, the output rate exceeds the input allowable range on the MD side (see FIG. 7). 7) (see step 118 in FIG. 7), the output rate is lowered (see step 119 in FIG. 7), and the output rate is lowered until the output rate is within the allowable input range on the MD side (see step 120 in FIG. 7). If it is determined in step 116 that the outer peripheral side has been entered, a predetermined number of revolutions at the reproduction position on the CD is set (see step 113 in FIG. 7). Next, when a predetermined time has passed while maintaining the predetermined rotational speed (see step 114 in FIG. 7), the rotational speed of the spindle motor is increased by a predetermined amount (see step 115). This operation is repeated to the outermost periphery.

  Thus, for example, as shown in FIG. 6, the spindle motor can be rotated at the maximum rotation speed that can be rotated on the inner circumference side, and data is output at the upper limit output rate that does not cause the compression processing of the MD player to fail. It is possible to increase the high-speed dubbing performance to the limit by making the output rate constant on the outer peripheral side and controlling the rotation speed of the spindle motor.

  Note that, by using the time code of FIG. 5, even if a part of the CD is dubbed instead of the whole, the part of the inner side or the outer side is parted by step 117 in the flowchart of FIG. It is possible to achieve high-speed dubbing by determining whether this is true.

  As described above, according to the first embodiment, when dubbing from a CD disc on which uncompressed data is recorded to an MD disc on which data is compressed and recorded, the inner circumference side of the CD disc is the inner circumference side. Jitter generated by increasing the number of rotations of the disk up to the upper limit of rotation is absorbed by the memory, and data is output at the upper limit output rate at which the outer peripheral side can normally operate the compression processing on the outer peripheral side. Therefore, the dubbing speed can be further increased.

(Embodiment 2)
FIG. 1 is a block diagram of a spindle motor control device mounted on a CD system for dubbing music data from a CD player to an MD player according to Embodiment 2 of the present invention.
This spindle motor control device corresponds to the outer peripheral side control unit in the first embodiment.

  In FIG. 1, the spindle motor control apparatus according to the second embodiment includes a CD system 10, a memory 16, and a system controller 1000.

  The CD system 10 includes a demodulation (correction) unit 11, a reversible compression unit 12, a memory controller 13, an expansion unit 15, a selector 51, an output signal generation unit 17, a servo loss detection unit 14, and a CLV / dubbing switch. The controller 18, the CLV controller 20, the address difference spindle motor control circuit 32, the selector 52, the fixed value output unit 21, and the selector 53 are included.

The address difference spindle motor control unit 32 includes a phase control unit 30, a speed control unit 31, a gain adjustment unit 19, and an addition unit 19a.
The phase control unit 30 includes a target address difference generation unit 22 and a subtraction unit 30a.
The speed control unit 31 includes a data holding unit 23 and a subtraction unit 31a.

Next, the operation will be described.
(Normal playback mode)
First, it is assumed that the user selects a normal playback mode in which a CD is played at a standard speed by a key operation.

  The system controller 1000 determines that the normal playback mode is selected by key input. As a result, the CLV / dubbing switching control unit 18 generates a CLV / dubbing switching control signal 29 indicating that the CLV mode is set. In response to the CLV / dubbing switching signal 29, the selector 52 selects the output signal of the CLV control unit 20.

  If there is no servo detachment, the selector 53 selects the output signal of the selector 52 as the spindle motor control signal 33, so that the spindle motor 37 is set at a constant linear speed at the standard speed by the output signal of the CLV control unit 20. That is, the rotation control is performed so that the rotational speed gradually shifts from the low speed to the high speed from the inner circumference side toward the outer circumference side.

  At this time, since the selector 51 selects the output signal of the demodulation (correction) unit 11, the output signal generation unit 17 processes the signal reproduced at the standard speed and demodulated and error-corrected by the demodulation (correction) unit 11. Then, after conversion to an analog signal, the speaker generates sound.

  On the other hand, when the servo deviation detection unit 14 detects the servo deviation, the selector 53 selects the fixed value of the fixed value output unit 21 by the servo deviation signal 38 and outputs it as the spindle motor control signal 33. Therefore, the spindle motor 37 recovers a stable rotation by this fixed value, and can return to the steady state from the out-of-servo state.

(Dubbing mode)
Next, it is assumed that the user selects the dubbing mode by key operation.
In this case, the selector 52 selects the output signal of the address difference spindle motor control circuit 32 and the selector 51 selects the output signal of the decompression unit 15 under the control of the CLV / dubbing switching control unit 18.

First, the spindle motor 37 is rotated by the voltage generator (not shown) so that the allowable multiple on the receiving side is not exceeded on the outer peripheral side, and the reproduction signal is read from the optical disc D.
The reproduction signal read from the optical disk D is subjected to signal processing by the demodulation (correction) unit 11 and written to the memory 16 by the memory controller 13. When writing to and reading from the memory 16, the lossless compression unit 12 and the decompression unit 15 are used, so that the capacity of the memory 16 can be reduced and data loss due to compression / decompression processing is eliminated.

The demodulation (correction) unit 11 demodulates the reproduction signal read from the optical disc D by the optical pickup 41, and the demodulated data is restored and interpolated by the internal error correction unit.
The lossless compression unit 12 executes a compression / decompression method that can decompress the original data without causing loss when the decompression unit 15 decompresses the compressed data.
The memory 16 is composed of a RAM that can be written and read. This memory 16 is originally a shock proof that stores reproduction data for a certain period in order to reduce the influence on the reproduction due to the impact when a physical impact force is applied to the CD system having a CD player and an MD player from the outside. It is used for.

The memory controller 13 controls writing to and reading from the memory 16, and data stored in the memory 16 is read by the memory controller 13.
The data 25 read from the memory 16 is maintained at a constant transfer speed by the output signal generator 17 and transferred to the MD player.
The output signal generation unit 17 generates a data format that can be dubbed by the dubbing side, such as MD.

  The memory controller 13 controls the write address 26 and the read address 27 so that the memory 16 does not overflow or underflow. As a result, the reading speed by the memory controller 13 and the data output speed from the output signal generator 17 are the same, and the transfer speed to the MD player is kept constant even when the rotational speed of the optical disk is changed. This means that the shock proof memory 16 absorbs the jitter generated when the spindle motor is rotated on the outer peripheral side so as not to exceed the allowable multiple on the receiving side.

  For this reason, it is possible to set the rotation speed of the spindle motor as high as possible without having a margin in order to suppress the influence of jitter.

  The address difference spindle motor control unit 32 includes a phase control unit 30, a speed control unit 31, a gain adjustment unit 19, and an addition unit 19a.

  The phase control unit 30 receives the address difference between the write data 24 and the read data 25 from the memory controller 13 for each arbitrary frequency, and the difference between the target address difference and the address difference 34 from the target address difference generation unit 22. A certain address difference difference ΔAD 35 is generated.

  The target address difference is a target value of the address difference between the write data 24 and the read data 25, and this value can be set. The target address difference needs to be set to such an extent that the memory 16 does not cause an overflow or underflow, and is preferably set to about 1/2 to 3/4 of the capacity of the memory 16. In the second embodiment, the spindle motor control signal is generated so that the address difference 34 approaches the target address difference.

In the speed control unit 31, the subtraction unit 31 a generates an address difference difference ΔΔAD 36 that is a difference between the address difference 34 and the address difference held by the data holding unit 23.
The data holding unit 23 holds the address difference 34 one sample before.
After gain adjustment by the gain adjustment unit 19, the addition unit 19a adds the address difference difference ΔAD 35 and ΔΔAD 36, and controls the output value of the spindle so that the address difference 34 converges to the target address difference.

For example,
Spindle motor control signal = (ΔAD · Kθ) + (ΔΔAD · Kv)
Can be written.
However, Kθ is a phase term and Kv is a velocity term.

By this spindle motor control, it is possible to set the maximum number of rotations allowed in the outer periphery.
In other words, if dubbing is simply performed at a constant linear velocity, the influence of jitter must be taken into consideration and the high speed must be suppressed and the setting must be made slightly. In the dubbing mode of the second embodiment, the number of rotations is increased by the jitter margin. It can be set, and dubbing can be performed quickly.

Further, by providing the memory 16 and the memory controller 13 capable of shock proof control even if an error occurs during reproduction of the optical disk, it is possible to prevent sound skipping.
Further, when the address difference 34 converges within a specified range near the target address difference, the burden on the spindle motor 37 can be further reduced by lowering the sampling frequency of the address difference signal 34 received from the memory controller 13.

  By the way, there are the following switching mode and servo error recovery mode as so-called self-recovery modes that automatically return to the original dubbing mode when stepping out from such a dubbing mode.

(Switching mode)
In this switching mode, the control method in the spindle motor control device is switched between the dubbing mode and the CLV (Constant Linear Velocity) mode, that is, the normal playback mode, so that the data even if the shock proof memory becomes empty. Can be transferred without interruption.

Hereinafter, this switching will be described with reference to FIGS. 1 and 8 to 11.
FIG. 8 is a conceptual diagram of the memory. The vertical axis indicates the difference between the write address and the read address, that is, the remaining amount of data accumulated in the memory. The vicinity of the target address difference is called a specified range. If the address difference falls within the specified range, it can be said that the dubbing mode is in a stable state. Further, the fact that the address difference becomes smaller and falls below a certain value is referred to as a specified range or less.

FIG. 9 is a state transition diagram of the CLV / dubbing switching control unit 18.
As shown in FIG. 9, this switching mode has two states S1 and S2. The state S1 is a dubbing mode, and the state S2 is a CLV mode, and the operations in these states are as described above. If the address difference is equal to or greater than the specified range, the dubbing mode S1 is maintained. If the address difference is equal to or less than the specified range, the process proceeds to the CLV mode S2. If the address difference is outside the specified range, the CLV mode is maintained, and if it returns to within the specified range, the dubbing mode S1 is resumed.

FIG. 10 shows a flowchart corresponding to this state transition diagram.
FIG. 11 shows an internal configuration of the CLV / dubbing switching control unit 18.

  1, 10, and 11, the address difference signal receiving unit 181 in the CLV / dubbing switching control unit 18 receives the address difference 34 from the memory controller 3, and the address difference determining unit 182 is in the dubbing mode (step of FIG. 10). 201) When the address difference 34 is less than or equal to the specified amount (see step 202), the CLV / dubbing switching signal generator 183 changes the value of the CLV / dubbing switching signal and shifts from the dubbing mode to the CLV mode (step). 203). At that time, the signal serving as the spindle motor control signal 33 is switched from the output of the address difference spindle motor control unit 32 to the output of the CLV control unit 20. At the same time, the signal input to the output signal generation unit 17 is switched from the output of the memory controller 13 (or the expansion unit 15) to the output of the demodulation (correction) unit 11.

  With this operation, the transfer speed is slower than in the dubbing mode, but data can be transferred without interruption even when the memory 16 is in an empty state.

  If the address difference 34 falls within the specified range during CLV mode playback (step 204), the address difference spindle motor control unit 32 shifts from the CLV mode to the dubbing mode. At this time, the spindle motor control signal 33 is switched from the output of the CLV control unit 20 to the output of the address difference spindle motor control unit 32. At the same time, the input of the output signal generation unit 17 is switched from the output of the demodulation (correction) unit 11 to the output of the memory controller 13 (or the expansion unit 15).

  The above operation is the CLV mode when the address difference 34 of the memory 16 is small, and the dubbing mode when the address difference 34 is large. Thereby, even when the memory 16 is in an empty state, data can be transferred without interruption. It is possible to transfer data at a higher speed than the reproduction in the CLV mode.

(Servo error recovery mode)
In this servo error recovery mode, when a servo error occurs, adjustment is made to increase the gain to return to the dubbing mode. This recovery operation will be described with reference to FIGS. 1 and 12 to 14.

In FIG. 1, the servo loss detection unit 14 outputs a servo loss signal 38 when the frame synchronization signal read from the optical disk D cannot be detected.
As a control method of the spindle motor control device in the servo error recovery mode, there are a forced output mode in which the spindle motor control signal 33 is set to an arbitrary constant value and a dubbing mode.

  Further, when the address difference 34 in the dubbing mode is within the specified range, it is called a stable state. The operation at the time of servo error according to the second embodiment will be described with reference to the state transition diagram of FIG.

  This servo error recovery mode has three states S3, S4 and S5. The dubbing mode S3 is the same as the state S1 in FIG. In state D4, the gain is reduced and a fixed value is output, and in state S5, the gain is increased. If a servo out signal is not detected, the dubbing mode S3 is maintained, and if a servo out signal is detected, the state transits to state S4. If the servo out signal is continuously detected in the state S4, the state S4 is maintained, and if the servo out signal is not detected, the process proceeds to the state S5. If the address difference is outside the specified range in the state S5, the state S5 is maintained, and if the address difference is within the specified range, the process returns to the state S3.

FIG. 13 is a flowchart corresponding to this state transition diagram.
During reproduction of the optical disk D in the dubbing mode (step 301), the servo synchronization detection unit detects no frame synchronization signal and outputs a servo failure signal 38. When the servo-off signal 38 is detected (step 302), there is no input signal written to the memory 16 and the address difference 34 is reduced, so that the output of the address difference spindle motor control unit 32 is in a direction to accelerate the spindle motor 37. On the contrary, it makes it difficult to pull in the servo. In order to prevent this, as the operation when the servo-out signal 38 is detected, the dubbing mode is switched to the forced output mode, and control for suppressing the acceleration of the spindle motor 37 is performed. As another method, when the servo-off signal 38 is detected, acceleration of the spindle motor 37 is suppressed by lowering the gain while maintaining the dubbing mode (step 303). By performing the above control, the servo can be easily pulled.

  As a result of the above operation, when the servo is pulled in and the servo out signal 38 is not detected, the gain of the gain adjusting unit 19 is defined by a certain period or the address difference 34 for the purpose of returning to the dubbing mode and increasing the address difference 34. Raise until it is within range. This makes it possible to return to the stable state of the dubbing mode in a short time. As another method, when the servo is pulled in and the servo deviation signal 38 is not detected (step 304), the gain of the gain adjusting unit 19 is increased until the polarity of ΔAD changes from negative to positive (step 305). If the address difference is within the specified range (step 306), the dubbing mode is resumed. In any control, it is possible to return to the stable state of the dubbing mode in a short time.

  As described above, according to the spindle motor control device according to the second embodiment, when dubbing from the CD player whose rotation is controlled by CLV to the MD player, the spindle motor is connected to the limit rotational speed on the outer peripheral side of the CD. The control signal is set to a fixed value so that it can be rotated and played back, and the jitter caused by CLV control is absorbed by the shockproof memory, so that the dubbing to the MD on the outer periphery side of the CD can be accelerated. It becomes.

(Embodiment 3)
The third embodiment relates to an output rate control device. This output rate control device corresponds to the inner peripheral side control unit in the first embodiment.

  When the output rate control device tries to reproduce at the limit rotation speed of the spindle motor on the inner circumference side of the optical disc, the output rate exceeds the processing capability of the MD side encoder due to jitter, and the processing of the encoder fails. This can solve the problem that dubbing takes a long time when performing dubbing or the like, since reproduction cannot be performed at the limit rotational speed of the spindle motor.

That is, when the memory capacity is small and playback is performed at high speed, the memory often overflows or underflows when the output signal rate is controlled from the outside.
In the output rate control apparatus of the third embodiment, in order to prevent such memory overflow and memory underflow, the memory address differential data is monitored as needed, the address differential data is calculated to obtain the pitch shift amount, and the output signal rate By automatically changing, the memory overflow and underflow are prevented, and data transfer at higher speed is possible.

FIG. 15 is a main block diagram of the CD player when dubbing music data from the CD player to the MD player according to Embodiment 3 of the present invention.
In this example, music data is transferred to a recording apparatus, that is, an MD player, at a high speed for dubbing and the like.

  In FIG. 15, it is assumed that an optical disk D such as a music CD disk rotates while being maintained at a constant rotational speed by a spindle motor. That is, the linear velocity gradually increases from the inner periphery to the outer periphery. Assuming that the limit rotational speed of the spindle motor is 2000 rpm, the innermost circumference will be reproduced at four times that speed. If the reproducible double speed of the CD player and the double speed of MD dubbing are both 4 times or more, dubbing at about 4 times speed can be performed at the innermost circumference due to the performance of the spindle motor.

  The optical pickup 41 reads music data obtained from the optical disc D. Music data read by the optical pickup 41 is first generated into binary data by the data slicing unit 63, and a clock synchronized with the reproduction speed of the music data is generated by the PLL function.

  The binarized music data is demodulated by the signal processing unit 64 by EFM (Eight to Fourteen Modulation). The demodulated data enters an error correction unit called CIRC (Cross Interleaved Reed-Solomon Code) in the signal processing unit 64 by the writing system 641 to determine whether the read data is correct or incorrect. Correct the data. At this time, the CIRCRAM 642 which is a memory is used, and reading is performed by the reading system 643. In the normal mode, writing into the CIRCRAM 642 is performed in synchronization with the rotation of the optical disk, and reading out of the CIRCRAM 642 is output in synchronization with the crystal oscillator, so that the rotational jitter of the spindle motor is absorbed by the memory.

  However, let us consider a case in which the rotation speed of the spindle motor is constant and the linear velocity is not constant. Reading of the CIRCRAM 642 is performed in synchronization with the writing, and the signal is processed in the signal processing unit in synchronization with the rotation of the optical disk. Even if the CIRCRAM 642 absorbs a change in the linear velocity due to the constant rotation speed of the spindle motor, the memory capacity is insufficient and the overflow is likely to occur. Therefore, the change in linear velocity is absorbed by the shock proof memory 16, and writing and reading are controlled to perform stable data transfer at high speed.

  The demodulated / corrected music data is controlled by the memory controller 63 and written to and read from the shock proof memory 16. At this time, writing to the shock proof memory 16 is performed in synchronization with the rotation of the optical disk D. The transfer speed to the MD player and the reading from the shock proof memory 16 are synchronized, and the reading speed of the shock proof memory 16 is changed by switching the transfer speed to the MD player. This prevents overflow and underflow of the shock proof memory 16.

  The serial output signal generator 69 converts the music data read from the shock proof memory 16 into a format that can be dubbed by the MD player, which is a dubbing device, and sets and outputs an output rate. Further, difference data of the address difference between the write address and the read address is received from the memory controller 63, and the output pitch shift amount is calculated by calculating the difference data. Further, the memory controller 63 controls the operation speed of reading the shock proof memory 16 from the output rate.

  FIG. 16 shows a serial output signal waveform as a format of transfer data. As shown in FIG. 16, serial output is transmitted by three lines of data SRDATA 221, Lch, Rch identification signal LRCK222, and bit clock BCLK 223. As a feature of this serial output, in the data SRD / ATA 221, 0 bits to 15 bits of 1LRCK are audio data, and 16 bits to 31 bits are treated as Invalid. In addition, one LRCK of the Lch and Rch identification signals LRCK222 includes a 32-bit bit clock BCLK. Therefore, the transfer rate of the serial output is the case where the bit rate of the data SRDATA 221 remains 32, the transfer rate is changed by changing the cycle of BCLK 223 and LRCK 222, and the SRDATA 221 is expanded or contracted accordingly, and the SRDATA 221 in 1LRCK is LSB. There are two types of cases where the transfer rate is changed by increasing / decreasing n bits from the MSB and increasing / decreasing n clocks of the BCLK 223 in 1LRCK. For example, the data transfer at 4 × 32 / (32-16) = 8 times speed becomes possible by making the BCLK frequency 4 times that at the time of 1 × speed reproduction and cutting the 16th to 31st bits of SRDATA. .

  FIG. 17 is a detailed block diagram of the serial output signal generator 69. The serial output generation method described above will be described with reference to FIG. The bit clock BCLK is generated by frequency-dividing a crystal clock generated by a crystal oscillator (not shown) by a frequency divider 694.

  This serial output signal generation unit 69 calculates an address difference data and determines a pitch shift amount, an address difference data calculation unit 691, a pitch shift up / down counter 692 that sets how many BCLKs exist in one LRCK, a pitch It has a down counter 693 that loads and counts down the value of the shift up / down counter. When the count value becomes 0, the signal is inverted to generate LRCK. Parallel data is input, parallel-serial conversion is performed using the count value of the down counter, and SRDATA is created.

  The output rate control method of the serial output signal generator 69 will be described below. As described above, the difference data 73 between the write address and the read address to the shock proof memory 16 is received from the memory controller 63. Here, the address difference data 73 of the memory is paraphrased as the remaining amount of memory, and the control method of the shock proof memory 16 will be described with reference to FIG.

  First, the target memory remaining amount is set to an arbitrary value (see FIG. 18A). In order to prevent the overflow and underflow of the shock proof memory 16, it is preferable to set the memory capacity from about 1/2 to about 3/4. The target memory remaining amount and the current memory remaining amount are compared, and if the current memory remaining amount is less than the target memory remaining amount, the pitch shift amount is calculated so as to lower the output rate of the serial output signal generating unit 69. If the current memory remaining amount is larger than the target memory remaining amount, the pitch shift amount is calculated so as to increase the output rate of the serial output signal generation unit. Thus, by changing the output rate of the serial output signal generation unit 69 so that the remaining amount of music data that is continuously written in the shock proof memory approaches the target remaining amount of memory, overflow and underflow of the shock proof memory prevent.

  An example of the method of calculating the pitch shift amount in the serial output signal generation unit is given below. If the number of BCLK clocks in one LRCK can be set from 16 to 127, the pitch shift amount can be set from 16 to 127. Since the data portion of SRDATA has 16 bits, it cannot be set to 16 or less. Normally, 1LRCK has a bit clock BCLK of 32 clocks, so that 32 is used as a reference value and counts up or down from the reference value 32 by calculating the pitch shift amount. By changing the number of BCLK clocks in 1 LRCK, the pitch shift amount is determined at any time and reflected in the output rate. When the output rate is changed by this method, the BCLK cycle does not change.

  As shown in FIG. 18B, the serial output signal generator 69 sets the target memory remaining amount (upper limit) and the target memory remaining amount (lower limit), and the current memory remaining amount is the target memory remaining amount (upper limit). In such a case, the output rate is increased by lowering the counter value of the pitch shift amount, and the shift is made to reduce the remaining amount of memory. When the current memory remaining amount is equal to or less than the target memory remaining amount (lower limit), the output rate is lowered by increasing the counter value of the pitch shift amount, and the memory is shifted to the remaining amount. When the current memory remaining amount is between the target memory remaining amount (upper limit) and the target memory remaining amount (lower limit), the pitch shift amount is held without performing the pitch shift. The output rate is determined based on the counter value of the pitch shift amount, and control is performed so that the remaining memory capacity converges near the target remaining memory capacity.

  Also, the address difference data calculation unit 691 integrates the remaining memory capacity for a certain period and determines the polarity. If the polarity of the difference between the current memory remaining amount and the target memory remaining amount is positive and the integral value polarity is positive, the pitch shift amount counter value is increased, and if the integral value polarity is negative, the pitch shift is performed. Holds the quantity counter value. Further, if the polarity of the difference between the current memory remaining amount and the target memory remaining amount is negative and the polarity of the integral value is positive, the pitch shift amount counter value is held, and the polarity of the integral value is negative. If so, the pitch shift counter value is lowered. The output rate is determined based on the counter value of the pitch shift amount, and control is performed so that the remaining memory capacity converges near the target remaining memory capacity.

  As shown in FIG. 18C, the memory is divided into n, the output rate is set for each area, the current memory remaining amount and the memory area are referenced, and the output rate is switched.

  Each of the above is a method for controlling the output rate. By executing these methods, overflow and underflow of the shock proof memory 16 can be suppressed, and data transfer at high speed can be stably performed.

  As described above, the output rate control apparatus according to the third embodiment includes the track buffer memory, monitors the address difference data in the memory as needed, calculates the address difference data, obtains the pitch shift amount, and outputs the rate of the output signal. By automatically changing, it is possible to prevent memory overflow and underflow, and to perform stable data transfer of the reproduction signal even at high speed.

  For this reason, if playback is attempted at the limit rotational speed of the spindle motor on the inner circumference side of the optical disk, the output rate exceeds the processing capability of the encoder on the MD side due to the influence of jitter, and the processing of the encoder has failed. For this reason, it is impossible to reproduce at the limit rotational speed of the spindle motor, and it takes a lot of dubbing time when performing dubbing, and the optical disk is reproduced at the limit of the rotational speed of the spindle motor. If the memory capacity is small and playback is performed at high speed, the problem that the memory often overflows or underflows when the output signal rate is externally controlled can be solved. This makes it possible to transfer the playback signal stably even at high speeds. There dubbing to MD disc has the effect of making it possible to perform a high speed from the click.

  In each of the above-described embodiments, the case where it is realized as hardware has been described. However, it may be realized by software except for a part that can be realized only by hardware.

  In addition, the dubbing from the music CD disc to the MD disc has been described as an example. However, if the first medium records uncompressed data and the second medium records compressed data, Other optical disks may be used, and other media such as a semiconductor memory and a magnetic disk may be used.

  As described above, the spindle motor control device of the present invention includes a memory, a memory controller, an output signal generation unit, and an address difference spindle motor control unit. It is suitable for double-speed playback and uses a shock proof memory so that playback data can be played back intermittently. Therefore, data can be output at a constant transfer speed regardless of jitter due to uneven rotation of the disk, which is suitable for further speeding up data dubbing.

  In addition, the spindle motor control frequency is low, the motor can have low power consumption and long life, and its industrial applicability is very wide and large.

  The output rate control device of the present invention includes a signal processing unit that performs demodulation / correction, a track buffer memory, a memory controller, and an output signal generation unit. When the spindle motor reproduces an optical disc at the maximum rotation speed, Even if the capacity of the track buffer memory is small, it is possible to output data at high speed without causing memory overflow or underflow, and it is useful as a playback device that can transfer data to a digital dubbing device. Industrial applicability is very wide and large.

The figure which shows the dubbing system which performs the dubbing from the CD player to MD player in Embodiment 2 of this invention. The figure which shows the block configuration of the system controller and CD control part in Embodiment 1 of this invention. The figure which shows the table | surface showing the difference in the operation mode in Embodiment 1 of this invention. The figure which shows the flowchart which switches the operation mode in Embodiment 1 of this invention The figure which shows the time code which shows the elapsed time in CD disc The figure which shows the change of the rotation double speed at the time of dubbing from the CD player to MD player in Embodiment 1 of this invention The figure which shows the flowchart at the time of dubbing from the CD player to MD player in Embodiment 1 of this invention The figure which shows the control parameter | index of the remaining amount of memory at the time of dubbing from CD player to MD player in Embodiment 2 of this invention State transition diagram showing transition of operation state when dubbing from CD player to MD player in Embodiment 2 of the present invention The flowchart figure which shows the transition of the operation state at the time of dubbing from CD player to MD player in Embodiment 2 of this invention The figure which shows the block configuration of the CLV / dubbing switching control part at the time of dubbing from the CD player to MD player in Embodiment 3 of this invention State transition diagram showing transition of operation state when dubbing from CD player to MD player in Embodiment 2 of the present invention The flowchart figure which shows the transition of the operation state at the time of dubbing from CD player to MD player in Embodiment 2 of this invention The figure which shows the block structure of the servo deviation detection part in Embodiment 2 of this invention. The figure which shows the dubbing system which performs dubbing from the CD player to MD player in Embodiment 3 of this invention The figure which shows the data format of the serial output at the time of dubbing from the CD player to MD player in Embodiment 3 of this invention The figure which shows the block configuration of the serial output signal generation part in Embodiment 3 of this invention. The figure which shows the mode of the memory remaining amount control by Embodiment 3 of this invention. Diagram showing system components to which the present invention applies The figure which shows the block configuration of the system component which is an object with which this invention is applied. The figure which shows the block configuration of the system controller and CD control part of the conventional system component The figure which shows the rotation speed of the CD player at the time of high speed dubbing of the conventional system component The figure which shows the structure of the CD system of the conventional system component The figure which shows the structure of the CD system of the conventional system component

Explanation of symbols

D Optical disk 10 CD system 11 Demodulation (correction) unit 12 Lossless compression unit 13 Memory controller 14 Servo loss detection unit 15 Expansion unit 16 Memory 17 Output signal generation unit 18 CLV / dubbing switching control unit 19 Gain adjustment unit 20 CLV control unit 21 Fixed Value output generation unit 22 Target address difference generation unit 23 Data holding unit 24 Write data 25 Read data 26 Address (WAD) when data is written to the memory
27 Address for reading data from memory (RAD)
28 EMP signal 29 CLV / dubbing switching signal 30 Phase control unit 31 Speed control unit 32 Address difference spindle motor control unit 33 Spindle motor control signal 34 Address difference signal 35 ΔAD signal 36 ΔΔAD signal 37 Spindle motor 38 Servo out-of-drive signal 41 Optical pickup 63 Data slice unit 64 Signal processing unit (demodulation / correction)
69 Serial Output Signal Generator 1000 System Controller

Claims (24)

An optical disk device for reproducing an optical disk;
A receiving side device having a limit in dubbing speed and dubbing data reproduced by the optical disc device,
In a dubbing system for an optical disc device that performs dubbing of data between the optical disc device and the receiving device,
A rotation speed setting unit for setting a rotation speed of a spindle motor that rotates the optical disk so that the optical disk does not exceed an allowable double speed of the receiving apparatus when the optical disk device reproduces the outer peripheral side of the optical disk;
A jitter absorber that absorbs jitter caused by the rotation of the spindle motor on the outer peripheral side of the optical disc;
An output rate control unit for controlling the output rate of the optical disc device so that the limit of the dubbing speed of the receiving device is not exceeded when the optical disc device reproduces the inner circumference side of the optical disc;
A dubbing system for an optical disc apparatus. The dubbing system for an optical disc apparatus according to claim 1,
The optical disk device is a CD drive;
The receiving device is an MD drive;
A dubbing system for an optical disc apparatus. The dubbing system for an optical disc apparatus according to claim 1,
The spindle motor is rotationally controlled so as to have a constant linear velocity (hereinafter referred to as CLV).
A dubbing system for an optical disc apparatus. An optical disk device for reproducing an optical disk;
A receiving side device having a limit in dubbing speed and dubbing data reproduced by the optical disc device,
In a dubbing method of an optical disc apparatus for dubbing data between the optical disc apparatus and the receiving device,
When the optical disk device reproduces the inner circumference side of the optical disk, the output rate of the optical disk device is controlled so as not to exceed the limit of the dubbing speed of the receiving device,
When the optical disc device reproduces the outer peripheral side of the optical disc, the number of rotations of the spindle motor that rotates the optical disc is set so as not to exceed the allowable double speed of the receiving device,
Absorbs jitter caused by the rotation of the spindle motor on the outer circumference side,
A dubbing method for an optical disc apparatus, comprising: In the control device of the spindle motor of the optical disc device,
A memory for writing an optical disk reproduction signal demodulated by an optical pickup;
A memory controller for controlling writing and reading to the memory;
An address difference spindle motor control unit that generates a spindle motor control signal by referring to an address difference between a write address and a read address to the memory of the memory controller;
An output signal generation unit that converts read data read from the memory into output data;
A spindle motor control device characterized by that. In the spindle motor control device according to claim 5,
The address difference spindle motor controller is
A phase control unit that generates a phase difference signal according to a difference between the address difference and a target address difference that is a target value of the address difference;
An address difference held in a memory that holds the address difference, and a speed control unit that generates a speed signal according to the difference between the address difference,
The result of calculating the phase difference signal and the speed signal is output as a control signal for the spindle motor.
A spindle motor control device characterized by that. In the spindle motor control device according to claim 5,
A reversible compression / decompression unit for reversibly compressing / decompressing write data and read data to the memory,
A spindle motor control device characterized by that. In the spindle motor control device according to any one of claims 5 to 7,
The memory is a memory for shock proof that alleviates uneven reproduction that occurs in the optical disc device due to a physical impact applied to the optical disc device.
A spindle motor control device characterized by that. In the spindle motor control device according to claim 5,
Servo loss detection unit for detecting that the spindle motor has caused servo loss;
An output of the address difference spindle motor control unit with reference to a servo out signal detected by the servo out detection unit, and a switching unit for switching between fixed value output,
A spindle motor control device characterized by that. In the spindle motor control device according to claim 5,
A servo-out detecting unit for detecting that the spindle motor has caused servo out;
The address difference spindle motor control unit refers to the servo out signal detected by the servo out detection unit and lowers the gain when the servo is out.
A spindle motor control device characterized by that. In the spindle motor control device according to claim 10,
The address difference spindle motor control unit increases the gain of the address difference spindle motor control unit for a certain period after the servo out detection is not detected by the servo out detection unit.
A spindle motor control device characterized by that. In the spindle motor control device according to claim 10,
The address difference spindle motor control unit increases the gain of the address difference spindle motor control unit until the address difference falls within a specified range after the servo out detection is not detected by the servo out detection unit.
A spindle motor control device characterized by that. In the spindle motor control device according to claim 10,
The address difference spindle motor control unit increases the gain of the address difference spindle motor control unit until the polarity of the output of the phase control unit is reversed after the servo out detection is not detected by the servo out detection unit.
A spindle motor control device characterized by that. In the spindle motor control device according to claim 10,
Further equipped with a servo-out detecting unit for detecting servo out,
With reference to the servo out signal detected by the servo out detector, the output value of the address difference spindle motor controller is held.
A spindle motor control device characterized by that. The spindle motor control device according to claim 14,
The address difference spindle motor control unit increases the gain when the address difference is out of a specified range.
A spindle motor control device characterized by that. In the spindle motor control device according to claim 5,
A CLV controller that controls the rotation of the spindle motor so that the linear velocity is constant;
When the address difference is equal to or less than a predetermined amount, the output signal of the CLV control unit is used as the spindle motor control signal, and the input of the output signal generation unit is switched to the optical disc playback signal.
A spindle motor control device characterized by that. In the spindle motor control device according to claim 5,
When the address difference falls within a specified range, the spindle motor control signal is switched from the output of the CLV control unit to the output of the address difference spindle motor control unit, and the input of the output signal generation unit is changed from the output from the demodulation unit to the memory. Switch to output,
A spindle motor control device characterized by that. In the spindle motor control device according to claim 5,
When the address difference of the address difference spindle motor control unit falls within the specified range, lower the spindle motor control frequency.
A spindle motor control device characterized by that. A signal processing unit for demodulating and correcting a reproduction signal read from the optical disc;
A memory for writing the reproduction signal demodulated and corrected by the signal processing unit;
A memory controller that controls writing to and reading from the memory;
An output signal generation unit that generates a signal for converting and outputting data read from the memory into a predetermined format;
The memory controller generates address difference data that is a difference between a write address and a read address to the memory,
The output signal generation unit inputs the address difference data and controls the rate of the output signal.
An output rate control apparatus. The output rate control device according to claim 19,
The signal output from the output signal generation unit is a control signal that generates a delimiter timing in units of data consisting of a plurality of bits, a bit clock that generates a delimiter timing in units of bits, and a unit of the data. Consists of serial data containing valid data in part between the break timings,
An output rate control apparatus. The output rate control device according to claim 19,
From the address difference data, further comprising a calculation unit for calculating the output rate of the serial data,
An output rate control apparatus. The output rate control device according to claim 19,
When the address difference data is greater than or less than a certain value, the output rate of the serial data is calculated so that the read address follows the write address, and when the difference data is within a specified range The computer further includes an arithmetic unit that holds an output rate of the serial data.
An output rate control apparatus. The output rate control device according to claim 19,
An arithmetic operation for integrating the address difference data for a certain period and calculating the output rate of the serial data so that the read address follows the write address from the polarity of the integral data of the difference and the polarity of the address difference data Part further,
An output rate control apparatus. The output rate control device according to claim 19,
According to the address remaining amount indicated by the address difference data, the output rate of the serial data is switched.
An output rate control apparatus.

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