JPS5960768A - Disk record reproducer - Google Patents

Abstract

PURPOSE:To perform quick and accurate address retrieval by repeating alternately an operation by which a tracking control system is turned on and at the same time a track jump is generated and another operation by which the tracking control system is turned on and at the same time the address data is read out. CONSTITUTION:When an optical beam is successively displaced by kicking actions, a motor control circuit 24 moves the main body of a pickup so as to minimize the displacement. The pickup 13 moves quickly toward the radius direction of a disk, and a system controller 32 discontinues the supply of pulse signals to a muting circuit 31 and a kick control circuit 33 when the coincidence is obtained between the address data reproduced by an address data reproducing circuit 21 and the address set at the controller 32. Then the controller 32 sets the reproducer under a reproduction mode and retrieves a desired address. In other words, an unstable movement is avoided for a light beam with an intermittent kicking action, and furthermore the desired and satisfactory address data can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a disc record reproducing apparatus that is capable of performing a high-speed and accurate address search on a disc on which both digital data and address data are recorded.

[Technical background of the invention]

Recently, digital disc records, in which information signals such as audio signals or image signals are digitized and recorded on discs, and disc record playback devices that play back information recorded on these digital disc records have been developed.

This type of disc record (hereinafter referred to as a disc) is designed to record high-density information, and is designed to record digitized information as a series of pits formed in a spiral on one side. There are two.

The disc record playback system that plays this disc uses, for example, an optical pickup to follow the pit string recorded on the disc using a tracking control system to read out the pit string. This readout (
+1 is subjected to predetermined signal processing, converted into an original audio signal or image signal, and outputted to the outside.

Since such a disc record reproducing apparatus has a huge amount of recorded information on the disc, in order to easily reproduce the desired recorded information, the pickup is moved at high speed in the forward and reverse C directions in the disc radial direction. Second, a search function is provided to forcibly move to a position where desired information is recorded, skip the recorded information in between, and start reproducing the desired recorded information. This search function allows the disc record playback device to perform so-called random access to desired records and information, thereby increasing its operability. The principle of the search function of the record playback device will be explained.

As is well known, generally discs (the second one is digitized (
I'/<414 (hereinafter referred to as digital data) and addresses assigned to each portion of digital data divided in a predetermined format are recorded, and audio signals are also recorded on CD-type discs. Address data is recorded, which is a combination of digitized digital data, the song number r5 of the song consisting of an audio signal, and time data indicating the elapsed time of the song.

As a result, disc record 1' I of the CD type disc
Ii The raw device d sends the pickup in the forward or reverse direction of the disk radius, compares the address specified by the user with the address data read from the pickup, and sends the pickup when they match. By stopping, a series of operations are performed.

The main part of the disc record 1 which can perform the search operation is, for example, 4JA- as shown in FIG. 1≦2. In other words, disk I
I is rotated at a predetermined number of rotations by a motor 12 for the disk 9i1111+, and the data of the pit row is read out by an optical pickup L.

This pickup z31: ts pit row + fll'a
Laser oscillation 'Xs'' that generates the optical beat of expropriation, lens 1 that converges the optical beam on the pit row of the disk 11
5. Disc II guided by beam splitter 16
Detector 1 detects the light beam reflected by
7. Drive lens 15! rlrL.

A radial actuator that deflects the light beam in the radial direction of disk 1! 8 etc.

The first detector 17 is a light-receiving section that detects the recording data of the pit row, and the first detector 17 detects the recorded data of the pit row.
has a light receiving part that detects the displacement of the light beam in the radial direction,
The former light receiving output is supplied to a de-event demodulation circuit 19 for demodulation, and the latter light receiving output is supplied to a tracking signal detector 2θ comprising 41 tracking system 6111 systems.

The demodulated output of the data demodulation circuit 19 is the address data μf
In addition to being provided to the raw circuit 21, the output ☆11 is not shown in the figure.
．． Signal processing such as error correction and digital/analog conversion is performed via the first output (OUT) (if +J
It is provided to a processing device so that an audio signal can be obtained. Further, the address data reproducing circuit 21 extracts address data from the demodulated signal and displays the address on the display 22 (31").

Based on the input signal, the truck 1-driver signal detection circuit 20 drives the radial actuator via a tracking-revo circuit 23 that constitutes a truck controller control system, and also drives the pickup-1-3 via a motor control circuit 24. The drive side a
It is supposed to be done.

Then, the motor control circuit 24 is connected to the system control device i.
Due to the control from 26, backup-13 is forcibly moved in the radial direction of disk 11 at high speed)Ii!
+ ≦ 2 so as to force it. This system system mlj
The device 26 is configured to locate the desired address required for the search operation.
The storage and search operation is started by the user's operation, and +fl-: The stored address and the address data provided from the address data reproduction type 2 are detected and the pickup feed motor 25 1 at low speed
The search operation is then completed by moving 11μ to enter the playback state.

Such an l'/f speed record reproducing device 1t equipped with (, l configuration) may also have fast forward and rewind functions such as tJ65 (not shown) and cheap record.
(First Forward) lr and REV (Rehasu) operation. This is done so that a person can search for a desired address.
EV operation is, for example, system system a14J 硅1+-i,
When a predetermined operator 26 is operated, the pickup 13 is moved at high speed in the forward and reverse directions in the radial direction of the disk 11 by the motor control circuit 24 and the pickup feed motor 25.

[Problems with Back 11 Technology] However, in the disc record ++5 recording device (2) with the configuration shown in FIG. ll
11: When you mix FF and RE V it Yamasaku, r
'i: Bi...] is the L pit where the pickup upper part moves 7μ). The tracking of the row is lost, and the pit row to be tracked is fixed.
Due to the effect of
, llj. In this state, the address data can be displayed when the light beam is located on the pit row, but the light beam is moving unstable. However, there is a problem that, for example, even if a desired address is detected, it takes time for the movement of C1 to stabilize, and in some cases, the detected address may deviate from the assigned pit row. There was a problem.

On the other hand, search operation, 1-F operation and REVω
If the operation of the tracking servo circuit 23 is prohibited using the spoon that forms one part, the light beam will no longer have unstable motion and will become stable, but the address data reproducing circuit 21 will be unable to detect the address. It is something. Konotame, T'7. ') If the desired address data of II is used, sufficient reliability will not be obtained.

[Objective of the invention 1] This invention was made in view of the point C2 lead of the above i5 self, and is useful when sending the optical pickup of the pickup at high speed in the radial direction of the disk, such as in the Search 1j111 work, Fastford operation, and Reverse operation. Therefore, the light beam does not move unstablely and the disc record r:B'
The objective is to provide a good disc record playback device that can reliably retrieve the necessary and sufficient address data recorded on the disc (2) without reading it, and can reliably search the address on the disc (9). shall be.

[Summary of the invention]

This invention provides tracking control of the pink amplifier for a disc on which digital data is recorded every 1 Lli (2) with an address assigned to the digital data (2). In a disc record production device that performs a playback operation by moving along the radial direction, if the tracking rhyme 1 system 4.A] is used, both C
Dual polarity and negative polarity bar novel; ・1°iil rThe means of ',1'!,'t for forcibly causing the old pickup to jump by the kick signal formed by '1', and this first method The tracking control system is turned on with the dv1 production completion letter W of the means, and the second method of outputting the address data of the disk is Wf. d+h L, and third means for moving the pickup in the radial direction of the disk at high speed, thereby making it possible to search for the address of the previous Ot2 disk at high speed and accurately.

[Embodiments of the invention]

Detailed explanation of one embodiment of this invention is given below with reference to the drawings.
II.

FIG. 2 shows the main parts of the 7'' disk/code reproducing device 170) according to the present invention. Are the same parts in Figure 2 and Figure 1 the same? ):・Add and omit the explanation.

That is, if tracking I+l):)
The output terminal of the detection circuit 2o is the mugeing time h"?'+
It is connected to the input end of the tracking servo circuit 230 via sz. The third muting circuit has a control input terminal of ty:as.
Output terminal for muting system 1 of ll device 32 (Om
), and when the control input terminal becomes high level, the muting state is established, and when 1tilJ becomes the 11 input terminal 1tslco level, the muting is canceled.

The above system 1h port 11 device direct 32 is the output end (Ok)
is connected to the input end of the kick control circuit 33, and the input end (I
a) is connected to the output terminal of the address data reproducing circuit 21.

- [Second kick control circuit 33 has an output terminal connected to the control input terminal of the trough servo circuit 23 (the two are connected to each other, for example, a pulse of positive polarity is supplied to the input terminal). Front 1i2 Dragging servo circuit 23 output 1ii
kj forcibly (two planes J all ) to drive the pickup j4L halachial actuator 18 to move the lens to the z position. There is.

In the above 1 and 11 system control device 32, when an address for a search operation is set and a search operation start operation is performed, a pulse shown in FIG. output, and the output terminal (Om) is output from the output terminal (Ok).
) and output a pulse similar to C. Then, the system system device 32 outputs four states in which the address set during the search operation matches the address data output from the previous Fire address reproducing circuit 2, and outputs four states at each output terminal ( om):l;+ and (ok) together terminate the output of the low level tosi pulse.

Further, the kick 1lill 6111 circuit 33 detects the rising edge 1 of the pulse supplied from the system open side 1 device u32, and as shown in FIG. This is to force the tracking servo circuit 33 to output a kick signal of negative polarity.

Note that the motor control circuit 24 is controlled by the system 6111 device 32 via means not shown, for example.
The positive and negative polarities of the output signal are suitably reversed to switch the rotational direction of the big r-tube feed motor 25, so that the forward and reverse of the feeding direction (radial direction of the disk II) of the front Bi mill big up 3 can be switched to the switching side mlj. It has become.

That is, when a search operation is performed in a disc record playback device equipped with the above-mentioned parts, the muting circuit 31 and the tracking servo circuit 23 are supplied with the signals shown in FIGS. The pulses IN + are supplied from the system controller fj;j 32 and the kick control 6111 circuit 33.

That is, during the period t1 when the control input terminal of the muting circuit 31 is at a high level, the output signal of the tracking signal detection circuit 20 is muted and the tracking servo circuit 23 and the like are configured. When the tracking abrasive system is turned off, the tracking servo II:!l circuit 33 (secondary tracking servo II:!l path 23 is caused to output a kick signal to the motor control circuit 24 and the radial actuator 18). When a kick signal is supplied to the seven-wheel actuator 18, the light beam traverses a plurality of pit rows (that is, tracks) on the disk 11 and displaces the disk 11 in the forward or reverse radial direction.

In this case, the radial actuator 18. The radial drive system constituted by the door is approximated as a substantially second-order vibration system, and when a narrow pulse is supplied, it responds as a substantially inertial system. As a result, the radial actuator 18 changes the speed M response of the light beam as shown in FIG. 3(c) to the kick signal consisting of positive and negative polarity pulses shown in FIG. 3(bl). , the displacement M response of the optical beam changes as 21) 31zl kll.

Then, when each type and negative polarity pulse ends, the speed M of the light beam is made to be approximately zero,
The Hikari Beano is capable of quickly tracking the next pit row without making unstable movements. In this state (that is, period tm), by canceling the muting of the muting circuit 31, the system turns on the tracking control l+ composed of the l-hooking servo circuit 23, etc., and the light beam from the base grass is turned on. Mo S/r such that the displacement of is minimized
ii Control circuit 24 and pickup feeder 9 Motor 25
(The position of the second Civic tube 3 is controlled, and the radial actuator 18 is driven. Also, in this state, the address data reproducing circuit 21 to which the demodulated output of the data adjustment circuit 19 is supplied with the optical The address data of the disk II corresponding to the beam is transferred to the system side landing gear [a32
At the same time, it is supplied to the display 22 as shown in Table 71.

By the way, when the system control device @32 is in the search state as described above, the muting circuit 31'J and the kick circuit are activated until the address data read in period 1 matches the address data set by the user. control 1l111 circuit 3
3, a predetermined pulse signal is supplied to the circuit. As a result, Motobeam performs a kick motion to pass multiple pit rows (that is, trucks) with -1-Tsukui #3, and then
After a period long enough to regenerate the address no'-shi, the player begins to repeat the kick-up motion again.

1-2. When the light beam is sequentially displaced by the kick 01 operation, the motor control circuit 24 controls the skin of the light beam (
The pickup feed motor is driven to move the pickups 1-3 so that r' Motor side leg circuit 2
3, the pickup feed motor 25 is DIHLflJ so that the change in the light beam does not exceed a predetermined value.
The pickup moves smoothly along the radial direction of the disk 11 at Q speed.

Then, when the pickup-1-3 moves in the disk radial direction at high speed and the address data reproduced from the address data reproduction circuit 21 matches the address set in the system control device 32, the system system AT+ device 32 , the supply of the pulse In to the muting circuits 31#, 5 and the middle circuit 33 of the control circuit 6 is stopped, and, for example, the disk record playback device a is placed in the playback state and a desired address of the disk 11 is searched. As mentioned (by intermittently lfing the Nikittsu movement,
The light beam does not make unstable movements and displays the necessary and sufficient address data at 71'! RoJu (:1
Dioff, □. It is sent in the radial direction at high speed. 1 As a result, the disc record was re-written;
1 Rigawa-1's desired disk 11 address is 4i/
II.It is indeed searchable. Further, the amount of movement thII of the light beam l, which is moved by one kicking operation, can be reduced by shortening the pulse width of the kicking signal. This is extremely advantageous for discs in which adjacent pit rows (that is, tracks) are recorded with narrow intervals and at high density.

On the contrary, if the width of movement of the light beam by one kicking operation is increased beyond a certain level, the radial drive system may no longer respond as an inertial system, and its operation may become unstable. At this time, a pulse as shown in FIG.
By outputting the same pulse from the output terminal (Ok) as well as outputting the same pulse from the output terminal (Ok), the kick control circuit 33 is driven to drive the /C+tsuk No. 1.1 as shown in FIG. , so that the hooking servo circuit 23 outputs 1. In other words, the number of kicking operations is set to 11.
By making it several times, there are 11 kicks in one kick.”:S
There is a method that reduces the movement value of the light beam.

On the other hand, even when performing the above-mentioned FF operation and REV operation, it is preferable to perform a kick operation to move the light beam at high speed in consideration of the search operation. In other words, the apparatus shown in FIG.
Even when the disk is being moved in the radial direction, the address of the disk 1 corresponding to the necessary and sufficient 12 optical beams can be known from the display 22, and the user can easily and reliably determine the address of t() using this information. This is because □ii) is searched for.

By the way, when searching for the address of Disk II by FF2Fl or REV operation, if the address to be searched is near the light beam (2) corresponding address, the width of the light beam moved by one kick operation is small. On the other hand, if the address to be searched is far away from the address corresponding to the light beam, the wider the width of the light beam shifted by the lH kicking action, the faster the address search will be. For this reason, a configuration in which the moving width of the light beam is changed in step 1 (i'l) according to the passage of time from the start of Fli' or Rgv operation is suitable. If so, it is good.

From this, the address change as the time elapses for the FF or REV operation C2.k.1 is as shown in FIG. After confirming that, FF'an or R
1. Interrupt the operation of the EV operation controls and circle the area.1. By performing these operations, it is possible to quickly search for a desired address on the iE 611f.5. It is very good.

Here, as for the means for changing the moving width of the light beam described in "-," method 1: for changing the pulse width of the positive and negative polarities of the kick signal mentioned above, and address h extraction extraction j'+il.
There is a way to increase or decrease the number of subsequent kicks/1(, zoi(
, respectively; 14 functions can be selected and adopted.

Apart from this, there are other ways to move the light beam at high speed, for example, by controlling the motor control path 6 as appropriate.
There is also a method of moving the pickup 13 intermittently at high speed, and depending on the moving speed of the light beam, it is also possible to selectively use this method and a method using a kicking operation.

It goes without saying that the present invention is not limited to the above embodiments, and that various modifications and applications may be made without departing from the gist of the present invention.

〔Effect of the invention〕

As described in detail above, the present invention prevents the beam from making unstable motion, for example, when it is sent in the radial direction at high speed, and the address recorded in It is possible to provide a good disc record reproducing device a that can output data in the necessary amount and reliably and can reliably search for a desired address on the disc.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a drag i'1if31i11 system of a conventional disc 17 code playback device, and FIG. 2 is a block diagram showing main parts of a disc record playback device according to the present invention. , Figures 3 fal to (d) c and t, respectively, to explain and explain the operation of the device having the configuration shown in Figure 2 (two-phase diagram, Figure 413 fat
and (11) are used to explain a modified example of the device in FIG. 2, and FIG. II...Disk, 12...Motor%±:1-...
Pick r knob, 14... Laser oscillator, 15...
・Lens, 16...Vino splitter, 17...
] 1st Didek y% 18...Radial actuator, 19...Data 1V tone circuit, 20...Tracking signal detection circuit, 2nd...Address data roundworm circuit, 22...Table weapon, 23...Tracking servo circuit, 24...Tanabata control circuit, 25...Pickup feed motor, 26...System city IJ shouting device 1.
．． q t... mu-ring circuit, 32... system system a11 device, 33... flill 1l11 circuit. Yama-jin (P9 Patent Attorney Takehiko Suzue Figure 3 (a) (d) fr Figure 4 (a) Figure 5 Keikeijimon

Claims (1)

[Claims] A disk on which digital data is recorded with an address assigned to each predetermined unit of the digital data (
A disc record playback device (=) which performs a playback operation by moving a pickup along the radial direction of the disc (2) along the radial direction (2) of the tracking control system (2), and turning off the tracking control system (2) positive polarity and A kick signal comprising a pulse of negative polarity (secondly, a first means for forcibly causing the pickup to jump off the track, and a kick signal having a pulse of negative polarity), and a kick signal having a pulse of negative polarity;
When the system is turned on, a second means for generating the address data of the disk is driven, and the first and second means are alternately driven a plurality of times to move the pickup in the radial direction of the disk (at two high speeds). A disc record playback device comprising: a third means. A disc record reproducing device characterized in that it is capable of searching for an address of the disc at high speed and accurately.