JP2000293926A - Recording and reproducing device for optical carrier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the generation of error at the time of recording a recordable optical carrier. SOLUTION: In the recording/reproducing device 15 for the recordable optical carrier 1, when an ADIP(address in pregroove) code is unable to decode by an ADIP decoder 8 pulling out the clock from the ADIP code preliminarily recorded on the optical carrier 1, the recording operation to the optical carrier 1 is temporarily stopped by an error signal outputted from the ADIP decoder 8, and an information signal inputted in this stopping period is stored in a storage means 4, and after the error signal is released, the recording to the malfunctioned part is prevented by providing a changeover means 9 for recording the information signal stored in the storage means 4 to the optical carrier 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical carrier recording / reproducing apparatus which controls a recording operation by detecting a defect of an optical carrier when recording / reproducing information signals such as acoustic information and video information on the optical carrier.

[0002]

2. Description of the Related Art Conventionally, as optical carriers for recording sound, video, information, etc., CDs (Compact Discs),
LD (Laser Disc), MD (Mini Disc)
c), DVD (Digital Versatile D)
isc) and the like are generally known. Such an optical carrier can be used as a recordable optical carrier. FIG. 4 shows a conventional example of an optical carrier recording / reproducing apparatus for recording / reproducing an MD.

FIG. 4 shows a recordable / reproducible optical carrier MD1.
When reproducing, the optical pickup 3 irradiates a laser beam to the MD1, detects reflected light from the MD1, detects EFM (Eight to Fourteen) recorded on the MD1,
(Modulation) signal is read and supplied to the preamplifier 5.

The EFM signal c amplified by the preamplifier 5 is converted into a pulse signal by a waveform shaping circuit, synchronized with a clock by a register circuit or the like, then expanded by a reproduction signal processing circuit 11 and EFM demodulated to obtain a digital signal. Is converted to an analog signal (D / A conversion) and output to the output terminal T _out as an analog signal.

The preamplifier 5 generates servo control signals such as a focus error (FE) signal, a tracking error (TE) signal, and a slide reference signal from the EMF signal.
F. T. It is supplied to the S servo circuit 6.

F. T. The S servo circuit 6 generates servo control signals for the focus control (F servo), tracking control (T servo), and slide control (S servo) of the optical pickup 3 to control the optical pickup 3 and drive the slide motor. I do.

[0007] The difference between a recordable disc such as an MD and a read-only disc such as a CD is that a read-only disc uses a reference clock such as a tracking servo, a focus servo, and a spindle servo to determine the presence or absence of recording pits. From the signal recorded in the On the other hand, in a recordable disc, a pre-groove formed in advance on the disc is detected and tracking servo is applied. Further, the pregroove is wobbled in a direction perpendicular to the track direction, and the ADIP (Address)
In Pre Groove) code and record this A
The DIP code is decoded by the ADIP decoder 8 and A
The DIP clock is obtained and the spindle motor 13 is controlled at a constant linear velocity (CLV) via the spindle servo drive circuit 7.

[0008] When recording the MD1 is, the acoustic signal of the analog input from the input terminal T _in a recording signal processing circuit 1
The signal is supplied to the signal 0, sampled, quantized, converted from an analog signal to a digital signal (A / D conversion), subjected to processing such as compression, and then converted to an EFM signal. If the input digital signal to the input terminal T _in the digital processing of conversion into compression and EFM signals.

When recording is performed on the MD 1 using a magnetic head for modulating a magnetic field as the recording head 2, the recording signal processing circuit 1
The EFM signal a from 0 is given an address from the ADIP decoder 8 and the computer (CPU: Centr).
The signal is supplied to the recording head 2 as an EFM signal b via a switching circuit 14 controlled by a control circuit 12 such as an al Processing Unit. At this time, the laser semiconductor in the optical pickup 3 is driven to a recording power, a modulation magnetic field is output from the recording head 2, and E
Record the FM signal.

FIGS. 5 (A) to 5 (D) show signals of various parts associated with recording / reproduction of MD1 in the optical carrier recording / reproduction apparatus of FIG. FIG. 5A shows an EFM signal a output from the recording signal processing circuit 10, FIG.
FIG. 5C shows an EFM signal b supplied to the recording head 2 via the switching circuit 14, and FIG.
1 shows an EFM signal c input to the C.1 signal. For example, when a foreign substance or the like is mixed in MD1, a non-writable area d shown in FIG. 5B is generated. The signal recorded in the non-writable area d is not reproduced as shown by **** in FIG. 5D and is processed as an error signal. Therefore, when the non-writable area d is present in a range exceeding the error correction capability, the MD1 cannot be reproduced.

The main cause of an error signal when a signal recorded on a disk is reproduced is a defect on the surface of the disk itself, such as a foreign substance mixed in a manufacturing process of the disk, and a recording caused by a change in servo operation during recording / reproduction. Error or playback error This signal is generated when noise is superimposed on a recording signal during recording and recorded and reproduced as it is. Here, the largest cause of the error occurrence is as follows. 1.6μ when the track pitch on the disc is MD
m, and it is impossible to prevent all foreign matter such as dust from entering such a fine recording area. The fact that a signal recorded due to the incorporation of foreign matter causes a problem is evident from the use of an error correction format for a recorded signal even in a read-only disc such as a CD. On tall disks,
The probability of a failure occurring due to this factor is higher. A signal recording / reproducing apparatus which reproduces information recorded on a disk without error by avoiding the influence of defects (defects) on the disk surface itself which occurs during the disk manufacturing process is disclosed in
No. 168837.

A signal recording / reproducing apparatus described in Japanese Patent Application Laid-Open No. 63-168837 reproduces a disk in advance, stores a defective portion of the disk in a memory, and stores the defective portion in the memory when reproducing the disk again. The stored defective portion is read out, and reproduction is performed while avoiding the defective portion of the disk.

Japanese Patent Application Laid-Open No. 5-54525 discloses a method for preventing erroneous recording of a compact disk player.
FIG. 6 shows the configuration. 6, parts corresponding to those in FIG. 4 are denoted by the same reference numerals, and redundant description will be omitted. The optical pickup unit 3 is horizontally moved in the radial direction of the disk 1 by the slide motor 20, and the servo circuits 7 and 6 servo-control the spindle motor 13 and the slide motor 20.

The CPU 12 controls the servo circuits 7 and 6, the laser power control units and the modulation units 5 and 6, the encoder 16, the memory 17, and the like. The analog input signal is sampled and held by a sample holder circuit 19, converted into a digital signal by an analog / digital (A / D) converter 18, inputting the output of the A / D converter 18 or a digital input signal and receiving an EFM signal. The output signal from the memory 17 is stored in the memory 17 for a predetermined time, the parity is generated by the encoder 16 and the EFM signal is encoded by the encoder 16, and the laser power of the optical pickup 3 is made constant by the laser power control units and the modulation units 5 and 6. The EFM signal is modulated by laser light and output.

Data to be recorded on the additionally recordable disc 1 is temporarily stored using the memory 17, and if an error occurs during recording, if an error occurs within the predetermined time after delaying by a predetermined time. , Interrupt recording. Also,
If the recording is stopped after the predetermined time, the music is removed from the TOC (Table Of Contents) music list when the recording is completed, so that no music is selected during reproduction.

[0016]

Problems to be Solved by the Invention JP-A-63-1688
The signal recording / reproducing apparatus disclosed in Japanese Patent Publication No. 37 has to reproduce a disk in advance and store information on a defect position in a memory, and it takes time to reproduce. Reproduction cannot be performed while avoiding defective portions in real time during reproduction.
Further, in this configuration, recording is not described, and recording is not performed in real time while avoiding a defective portion as in the present invention.

According to the method for preventing erroneous recording of a compact disk player disclosed in Japanese Patent Laid-Open No. 5-54525, when an error occurs during recording on a disk, recording is interrupted. Must be re-recorded again, recording takes time, and recording cannot be performed in real time while avoiding errors.

[0018]

According to a first aspect of the present invention, an optical carrier recording / reproducing apparatus 15 for recording / reproducing an information signal on / from an optical carrier 1 on which address information is formed detects address information from the optical carrier 1. Address detection means 8, storage means 4 for storing an input information signal, storage means 2 for storing the information signal output from storage means 4 on optical carrier 1, and storage in storage means 4 based on the address information , And control means 12 for controlling the output from the storage means 4, and the control means 12 controlled by the address detection means 8.
Switching means 9 for switching the connection of the control signal input from the storage means 4 to the storage means 4. If there is an error in the address information detected by the address detection means 8, the switching means 9 switches the control signal to the optical carrier 1. Is temporarily stopped, the information signal input to the storage means 4 is stored, and if no error is detected in the address information detected by the address detection means 8, the switching means 9 switches the control signal to restart the recording. An optical carrier recording / reproducing device characterized by the following.

According to a second aspect of the present invention, in the optical carrier recording / reproducing apparatus 15 of the first aspect, the address information formed on the optical carrier 1 is a pre-groove 21 and the address detecting means is A
The DIP decoder 8, wherein the storage means 4 includes switching means 9 for switching connection of a control signal input from the control means 12 to the storage means 4 based on the output of the ADIP code from the ADIP decoder 8. This is an optical carrier recording / reproducing apparatus.

In the optical carrier recording / reproducing apparatus of the present invention, the writing of the recording signal to the disk is controlled according to the recording state of the ADIP code already on the disk. Prevents writing of signals to the area. Therefore, it is possible to perform recording / reproduction of a signal with less errors.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the optical carrier recording / reproducing apparatus of the present invention will be described in detail with reference to FIGS. 1 to 3. FIG. 1 is a system diagram showing one embodiment of the optical carrier recording / reproducing apparatus of the present invention. FIG. 2 is a diagram showing an embodiment of the configuration of a pre-groove formed on an optical carrier, and FIG. 3 is a diagram showing signals of various parts of the optical carrier recording / reproducing apparatus of the present invention accompanying recording / reproducing of the optical carrier. In FIG. 1, parts corresponding to those in FIG. 4 are denoted by the same reference numerals.

The disks used in the optical carrier recording / reproducing apparatus according to the present invention include MD, LD, DVD, and CD-R.
There are optical disks such as OM and recordable CD. Information signals such as audio information, video information, and computer data can be recorded and reproduced on the disc. In FIG. 1, the disc is MD
An example in which is applied.

The MD1 is rotatably mounted in the cartridge. The MD 1 is mounted on a turntable by loading a cartridge into the optical carrier recording / reproducing apparatus. A disk in the cartridge is fixed at a center position on the turntable, and is controlled to be rotatable by a spindle motor 13.

An optical pickup 3 is provided below the MD 1, and a recording head 2 using a magnetic head for modulating a magnetic field is provided above the MD 1. The optical pickup 3 and the recording head 2 are slidably moved by applying a driving force by a slide motor in the radial direction of the MD 1. The recording head 2 applies an N-pole or S-pole magnetic field corresponding to the recording signal to the MD 1.

The spindle servo circuit 7 controls the spindle of the spindle motor 13. F. T. The S servo circuit 6 controls the slide of the slide motor (S servo),
The focus control (F servo) and the tracking control (T servo) of the optical pickup 3 and the laser control of the semiconductor laser in the optical pickup 3 are performed. Spindle motor 1
3 is provided with a required number of rotations by a spindle control circuit in the spindle servo circuit 7 and CLV (Const.
ant Linear Velocity) is controlled.

F. T. A slide motor that slides the optical pickup 3 in the radial direction of the disk 1 is controlled by a slide motor control circuit in the S servo circuit 6.
F. T. A focus control circuit, a tracking control circuit, and a laser control circuit in the S-servo circuit 6 perform focus control, tracking control, and semiconductor laser on / off control of the optical pickup 3.

The reproduction system shown in FIG. 1 will be described. The optical pickup 3 irradiates the MD1 with a laser beam, detects reflected light from the MD1, and reads an EFM signal recorded on the MD1.

The read EFM signal is amplified by the preamplifier 5 and T. It is supplied to the S servo circuit 6 and the ADIP decoder 8.

F. T. The S servo circuit 6 includes a preamplifier 5
Tracking servo, focus servo, and slide servo are performed based on the TE signal and the FE signal supplied from the controller.

The ADIP is formed as a guide groove (pre-groove) for tracking in the entire recording area outside the lead-in area by the stamper when the MD1 is manufactured.

FIG. 2 shows a pre-groove 21 formed in the MD.
FIG. A dielectric film 25 is formed on the substrate 28.
And 27, an MO (Magneto O) that records the EFM signal b with the recording head 2 and the optical pickup 3
a reflective film 24 is formed on the dielectric film 25, and the pre-groove 21 is formed on the protective film 23 on the reflective film 24. This pre-groove 21
Represents wobbling 22 in a direction orthogonal to the tracking direction.
Have been.

The pre-groove 21 is wobbled 22 by about 30 μm. Tracking control is performed using the pre-groove 21. Frequency as a TE signal 22.
A 05 KHz sine wave is superimposed. The frequency component of the sine wave is taken out via the optical pickup 3, the preamplifier 5, and the ADIP decoder 8, and the spindle servo circuit 7
Controls the spindle motor 13 so that the frequency becomes constant, and performs CLV control.

Using the pre-groove 21, an address is formed and recorded on the entire circumference of the MD1. The address information is
The signal is modulated and superimposed on a 22.05 KHz sine wave signal used as a TE signal, and recorded as a wobbling of the pre-groove. This address (ADIP) is C
It is recorded every 13.3 msec like D.

ADIP is also used for M-type DVDs.
It is formed by a pre-groove as in the case of D.

The output of the preamplifier 5 is EFM in MD.
/ ACIRC (Adaptive Cross Inte
output terminal T via a playback signal processing circuit 11 having a function of a rread Read Solomon Codo) decoder, an audio decompression decoder, and a digital-analog conversion.
_out is output as audio information or the like.

The output of the ADIP decoder 8 is supplied to a spindle servo circuit 7 and also to a control circuit 12 composed of a microcomputer (CPU) or the like, and controls the switching means 9 on / off.

The recording signal system will be described. Information signal to be recorded, such as audio information is inputted from the input terminal T _in is supplied to the recording signal processing circuit 10 is A / D converted from an analog signal to digital data, after being compressed,
It is converted to an EFM signal.

EF output from the recording signal processing circuit 10
The M signal a is supplied to a storage unit (memory) 4. Switching means 9 is provided in parallel with the memory 4. Switching means 9
Is connected to the input line of the memory write clock e from the control circuit 12 to the memory 4 at all times, and the connection / disconnection (on / off) of the input of the memory read clock d from the control circuit 12 to the memory 4 can be switched. Connect to 4. The EFM signal a is written and stored in the memory 4 by the memory write clock e.

The EFM signal b stored in the memory 4 is read by the memory read clock d, and the EFM signal b is recorded on the MD 1 by the recording head 2 and the optical pickup 3.

The control signal g output from the ADIP decoder 8 for controlling the memory read clock d of the memory 4 to be turned on / off via the switching means 9 includes the ADIP code, that is, the address information, which is previously transmitted to the entire circumference of MD1. When normal reproduction is performed from the wobbled pre-groove 21, the switching means 9 is turned on, and the control circuit 12 causes the MD1 to read out the EFM signal b stored in the memory 4 by the memory read clock d. Record.

When the address information is not normally reproduced from the pre-groove 21, the switching means 9 is turned off so that the read clock d of the memory 4 is not inputted.
The reading of the FM signal b is stopped. At this time, the operations of the spindle servo and the tracking servo continue.

FIG. 3 shows an MD of the optical carrier recording / reproducing apparatus of the present invention.
FIG. 3 is a diagram illustrating signals of respective units accompanying recording / reproduction to / from a unit 1; FIG.
(A) EFM signal a from the recording signal processing circuit 10
Are always output and input to the memory 4 and stored.
FIG. 3 (B) in which no clock of address information from pregroove 21 accompanied by wobbling 22 of MD1 is detected.
When an error signal g is output from the ADIP decoder 8, the switching means 9 is turned off, and the input of the memory read clock d from the control circuit 12 to the memory 4 is stopped. Reading from the memory 4 is stopped. At this time, E to be recorded on MD1
The FM signal b is not recorded as indicated by **** in FIG. When the data enters the writable area again, the data of JKLMNOPQRS # stored in the memory 4 is read from the memory 4 by turning on the switching means 9 and inputting the memory read clock d to the memory 4. Then, the recording to the MD1 is resumed, and the EFM signal is recorded in the recordable area from the place where the recording is temporarily stopped.

The MD1 recorded as described above is shown in FIG.
A signal having no loss, such as the reproduced EFM signal of the above, can be reproduced.

After the recording is completed, the first and last times of the time when the decoding of the ADIP code was not performed normally are set as blank periods, and the U-TOC (User's T
table of contents (table of contents). Since the error point can be skipped when the MD1 is reproduced, the EFM signal c without any data abnormality or loss due to a disc defect can be obtained.

[0045]

According to the present invention, when recording on a carrier, it is possible to detect an unrecordable area on the optical carrier and perform recording while selecting a recording area on the recordable optical carrier. . During recording of the information signal, an error such as an address signal on the pre-groove is detected in real time, and recording is performed while avoiding the error location. When the recording of the information signal is completed, the TOC data is recorded on the optical carrier. Therefore, at the time of reproduction, it is possible to reproduce by skipping an error portion.

[Brief description of the drawings]

FIG. 1 is a system diagram showing an embodiment of an optical carrier recording / reproducing apparatus of the present invention.

FIG. 2 is a view showing one embodiment of a configuration of a pregroove formed on the optical carrier of the present invention.

FIG. 3 is a diagram showing signals of various parts involved in recording / reproducing of an optical carrier of the optical carrier recording / reproducing apparatus of the present invention.

FIG. 4 is a system diagram showing a conventional optical carrier recording / reproducing apparatus.

FIG. 5 is a diagram showing signals of various parts involved in recording / reproducing of an optical carrier of a conventional optical carrier recording / reproducing apparatus.

FIG. 6 is another system diagram showing a conventional optical carrier recording / reproducing apparatus.

[Explanation of symbols]

3 optical pickup, 5 preamplifier, 7 spindle servo circuit, 8 ADIP decoder, 10
Recording signal processing circuit, 11 ‥‥ reproduction signal processing circuit, 13 ‥
‥ Spindle motor

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G11B 20/18 574 G11B 20/18 574H

Claims (2)

[Claims] 1. An optical carrier recording / reproducing apparatus for recording / reproducing an information signal on / from an optical carrier having address information formed thereon, wherein address detecting means for detecting address information from the optical carrier, and an input information signal are stored. Storage means, recording means for recording the information signal output from the storage means on the optical carrier, storage in the storage means based on the address information, and control means for controlling the output from the storage means, Controlled by the address detection means,
Switching means for switching the connection of a control signal input from the control means to the storage means, and when there is an error in the address information detected by the address detection means, the switching means switches the control signal to switch the optical signal. The recording on the carrier is temporarily stopped, the information signal input to the storage unit is stored, and if no error is detected in the address information detected by the address detection unit, the switching unit switches the control signal to restart the recording. An optical carrier recording / reproducing apparatus characterized in that: 2. The optical carrier recording / reproducing apparatus according to claim 1, wherein the address information formed on the optical carrier is a pre-groove, the address detection means is an ADIP decoder, and the storage means is the ADIP decoder. An optical carrier recording / reproducing apparatus, comprising: switching means for switching connection of a control signal input from the control means to the storage means based on an output of an ADIP code from a decoder.