JP2002093069A - Optical disk unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce blocks which can not be recorded as much as possible by recording image information on an optical disk by drop recording of simple processing, and recording the data while confirming conditions for suppressing adverse influence on other blocks if a sector ID can not be read. SOLUTION: If the ID of a halfway sector in a block can not be read, the ID of the sector which can not be read is processed as a next sector number of the last recorded ID and the start of data recording is delayed a specific time determined as a standard behind the sector of last data recording.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a disk drive using a disk-shaped recording medium such as an optical disk and a control method therefor.

[0002]

2. Description of the Related Art Since a disk-shaped recording medium has random accessibility, a magnetic disk device has been developed as a peripheral storage device for a computer as a large-capacity and easy-to-use storage device. On the other hand, as the optical disk device, a large-capacity storage device in which a large number of optical disks are stored in a jukebox has been used for a computer. When data is recorded on a disk-shaped recording medium, data is recorded in a relatively small capacity unit on a section of a predetermined length of a spiral track or concentric track on a rotating disk. One section of the disk-shaped recording medium for recording the unit capacity data is called a sector. The sectors have individual numbers, and are arranged so that the numbers determine the radius on the disk and the relative angle from the reference sector in the circumferential direction. When data is recorded on the disk, the range of the sector in which the data is recorded is recorded in a data management area set on the inner periphery. In computer applications, since the demand for data reliability is high, when recording data, if the ID indicating the position of a sector cannot be read, or if it is determined that data cannot be recorded accurately in that sector, Then, an alternate sector portion set in advance on the outer peripheral portion of the optical disk or the like is reserved in a substitute sector, recorded there, and then returns to the original track to perform the subsequent processing.
The information on the replaced sector and the replaced sector is
It is recorded in the data management area on the inner circumference side. When inspected at the time of disk manufacture, sectors with abnormalities that are considered to be dusty or defective are registered as temporary defects in the disk's defect registration section,
The replacement sector is designated in the replacement track section. In addition, sectors that could not be recorded or read during use are similarly registered in the defect registration unit of the disk as secondary defects.

[0003] With the realization of high-density recording due to the development of data recording technology and the development of information compression technology, it has become possible to store long-time moving image information in a disk-shaped recording medium. The equipment used has been commercialized. A DVD standard has been proposed assuming that an optical disk is used to process both continuous data such as moving images and storage of relatively small data for a computer. In this method, video information is compressed by MPEG2, scrambled, error-corrected and coded, and the DVD format is converted and recorded on an optical disk.
m optical disks. Many titles have already been produced for reproduction-only discs, and reproduction devices are widely used.

On the other hand, a DVD recorder for recording moving image information on an optical disk in a DVD format has recently been commercialized. Furthermore, the image information taken by the camera is 8cm in diameter.
A DVD camera that records moving image information in a DVD format on a small-diameter optical disc has been developed. The optical disk for the DVD camera complies with the DVD-RAM standard. DVD
The RAM disk is registered in the same way as the computer for the defect registration. In the case of DVD, processing units are block units in which 16 sectors are collected in consideration of handling moving image information. Hereinafter, when a recording area divided on a disc basis is referred to as a block section, and data is referred to as a block unit, it may be referred to as a data block. In a DVD camera, after the moving image information shot by the camera unit is A / D converted, the data is compressed by MPEG2 and stored in a temporary storage memory. The data in the temporary storage memory is converted into a recording signal, sent to the optical disk device, and recorded on the optical disk. The data recording speed on the optical disk is higher than the average speed of the data output from the MPEG2 encoder. Generally, a defective portion exists in a recording medium, and it is unavoidable that small dust adheres to the surface of an optical disk which is a replaceable medium. When recording on an optical disc fails due to a defect or dust, if the recording is performed in the above-mentioned replacement block and the process returns to the subsequent block of the original track, the MPEG2 encoding is performed in the temporary storage device. Data is likely to overflow. Therefore, in the DVD standard, in the case of stream recording for continuously recording moving images or the like, if an error occurs during recording, the following two processes are allowed.

(1) A block in which an error has occurred is skipped, and data is rewritten continuously from the next block.

(2) The processing of the block in which the error has occurred is not specified, and the recording is continued with the original contents from the next sector.

The above (1) is called slip recording, and (2) is called drop recording. When playing back a slip-recorded disc, data is read by skipping the block in which an error has occurred, so that the same data as in the normal case enters the reproduction system, so that a normal screen is reproduced. On the other hand, when playing back a disc that has been dropped and stored, a part of the playback screen is distorted in a rectangular shape because the data of the block in which the error has occurred is not normal.
This is called block noise. It is necessary to suppress the occurrence frequency so that this is not noticeable.

Which of the above two processes is adopted is left to the judgment of the designer. In the case of DVD recording, scramble processing for rearranging data to be recorded (in the case of a camera, data compressed by MPEG2) using a block address on a recording disk as a key, ECC processing for adding an error correction code, and Since the data is converted into the DVD format and recorded on the optical disk, there is a problem that it takes time to perform the processing before recording. When performing slip recording, if a block is suddenly changed, pre-processed data cannot be used, so it is necessary to perform processing again, and it is necessary to wait one or more revolutions until a predetermined block position comes again. is there. If other processes are overlapped, the encoded data of MPEG2 cannot be stored in the temporary storage device, and there is a risk of overflow. In addition, when the slip recording is performed, the recording area shifts backward, and the last block protrudes from the recordable area, so that there is a problem that the recordable time is shortened. Therefore, although there is a possibility that the image quality is slightly inferior, it is practical and reliable to use drop recording which is simple in processing. An example of a technique similar to drop recording is described in JP-A-5-342759.

[0009]

When recording on an optical disk by drop recording, if the ID cannot be read, the possibility of destroying the data of another block is minimized. Had stopped. D
In a VD-RAM disk, tracks in a flat portion having the same height as the height of the medium surface called lands and slightly groove-shaped tracks called grooves are alternately arranged in the radial direction.
The land / groove system that records on each track is adopted. The ID has a plurality of pits (recesses) having a length representing information at the head of the sector, and the pits are arranged between the land and the groove in the radial direction. The light spot for recording or reading data is track-controlled with reference to the center of the land or groove. Therefore, the method of detecting the positional deviation (track deviation) of the light spot in the radial direction, recording data, and reading data, and the influence of each parameter on ID reading are different. In many cases, there is no problem in recording and reading. Conventionally, when the ID could not be read, the recording of data in the data portion was stopped. However, the possibility of normally recording data has been abandoned. Should be recorded in the data section, block noise during reproduction should be reduced.

In view of the above, in the present invention, when drop recording is performed on an optical disk, when an ID cannot be read, conditions for suppressing adverse effects on other blocks have been clarified, and the conditions have been confirmed. In such a case, an object of the present invention is to record data, and as a result, to reduce the number of times of drop recording as much as possible. The condition for suppressing the adverse effect on other blocks is that the position of the light spot is correctly controlled on the track. Further, the circumferential position at which data is recorded is within a range in which data of the sector is to be recorded.

[0011]

In order to achieve the above object, according to the present invention, an image signal from an image pickup device is changed to image data, or an image signal for displaying the changed image data on a display means. And an encoding / decoding process, modulation / demodulation, addition of an ECC (Error Correction Code), or recording on a disc-shaped recording medium in order to convert the image data from the image signal processing unit into recording data. Signal processing means for converting to a recording format for recording, a memory for temporarily storing the recording data, and recording the recording data on a disk-shaped recording medium or reproducing the recorded data in the disk-shaped recording medium A recording / reproducing means, a focus error signal for detecting a shift such as focus and tracking of the optical head, and a tracking error signal. A recording or reproduction position detecting means for detecting a recording or reproduction position on the recording medium, a focus or tracking control of an optical head, a disk rotation control, and an address position by a signal or an address signal on the recording medium. A recording or reproduction position control means for controlling a recording or reproduction position such as seek control, wherein the focus error signal, the tracking error signal, and the disk rotation speed signal are respectively set in a predetermined allowable range by the recording or reproduction position detection means. These signals are set within an allowable range, and an ID representing the head position of a data block to be recorded on the disc is set.
When a signal is read, data recording is started in the block. According to the invention described in claim 1, when the ID of a sector in the middle of the block cannot be read, the focus error signal, the track error signal, If the rotational speed signal of the disk is within the allowable value, the ID of the sector that could not be read is processed as the next sector number of the ID recorded before that, and the data recording is continued, and the focus error signal and If any one of the track error signal and the disk rotation speed signal exceeds the allowable value set for each of them, the recording in the block is stopped. Further, the data recording is started at a timing delayed from the sector for which the data recording was performed immediately before by a predetermined time defined as a standard.

[0012] The invention described in the second aspect applies a method of managing a data recording area of a disk by a block section in which the 16 sectors are combined, and before recording the record data in the data storage section (sector). 2. The method according to claim 1, wherein data of a block section on the disk to which the defective sector is allocated is extracted, and data of the processing unit (block) and thereafter are allocated to a block section next to the block section including the defective sector. Invention.

[0013] In the invention according to the third aspect, when the ID of a sector in the middle of the block cannot be read, the recording of the sector is stopped, the focus error signal, the tracking error signal, and the rotation speed of the disk are determined. When the signal is within the allowable value and the head address of the block is read again, the recording of the block is started again, and if the ID of the sector in the middle of the block cannot be read, the focus error signal and If the track error signal and the rotation speed signal of the disk are within the allowable value, the data recording is continued, and one of the focus error signal, the track error signal and the rotation speed signal of the disk is If the set value exceeds the allowable value, the recording in the block is stopped. In this case, the retry of the recording (retry) is limited to one time.

The data to be processed may include not only image data obtained from the image pickup device but also audio data, data supplied continuously, and the like. Unless it is guaranteed that the data can be recorded on the disk, A recording device and a recording method as a system that cannot be used are provided.

As described above, according to the present invention, a recording apparatus and a recording method are provided as a system such as a disk camera or the like which must guarantee that data can be continuously recorded on a disk.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 4 is a block diagram showing a schematic configuration of a camera device using the disk device according to the first embodiment of the present invention as a recording unit, and FIG. 5 is a schematic configuration of a main portion of the disk device around a head unit. FIG.

In FIG. 4, reference numeral 1 denotes a photographing means, which comprises a photographing optical system 2, a CCD (image pickup device) 3, an A / D converter 4, etc., and forms a subject image on the CCD 3 by the photographing optical system 2. An image signal is obtained by the CCD 3 and the A / D
The data is digitized by the converter 4 and output. Reference numeral 5 denotes an image signal processing means for converting an image signal from the photographing means 1 into image data. The image signal processing means 5 also processes an audio information signal from a microphone 14 which is an audio information signal input means. It has become. The output result of the image signal processing means 5 is sent to the recording / reproducing signal processing means 7 described below in accordance with a command from the system control means 21. At the time of reproduction, the image signal processing means 5 converts the image data from the recording / reproduction signal processing means 7 into an image information signal for display output. The audio data from the recording / reproducing signal processing means 7 is converted into an audio information signal for audio output.

Reference numeral 7 denotes a recording / reproducing signal processing means for converting the recording data reproduced from the disk-shaped recording medium 9 into image data for converting the data into recording data according to a recording format for recording on the disk-shaped recording medium 9. In order to perform conversion processing (including audio data), processing such as encoding / decoding processing, modulation / demodulation processing, and ECC addition / error correction processing is performed. The recording / reproducing signal processing means 7 inputs image data (including audio data) from the temporary storage memory 6 when recording on the disk-shaped recording medium 9 and converts the data reproduced from the disk-shaped recording medium 9 into image data (audio data). When performing the conversion process (including data), the image data is output to the temporary storage memory 6.

Reference numeral 8 denotes recording / reproducing means, 9 denotes a disk-shaped recording medium (optical disk) that is driven to rotate by a spindle motor (see FIG. 5), and 10 denotes an optical system including a laser source (laser diode), an optical system, a photodetector, and the like. Head
The recording / reproducing means 8 records the recording data stored in the memory 6 on the optical disk 9 by the optical head 10, and records the recording data on the optical disk 9 by the optical head 10.
Is temporarily stored in the memory 6.

Here, a recording and / or reproducing method for the optical disk 9 will be described with reference to FIG.

The recording data is a light emitting element (semiconductor laser) 16 for outputting a light beam of a predetermined power, and a light receiving element (photodiode) for detecting light reflected from an optical disk.
17, half mirror, collimator lens, objective lens,
And an actuator 18 for controlling the focus of the light beam and the track position by driving the objective lens in a direction perpendicular to the disk surface and in a radial direction. The light receiving element 17 includes a detector divided into two so as to detect a light amount difference in a disk radial direction. The data is recorded on an optical disk as the recording medium 9 by an optical head 10 composed of a laser or the like. The recording or reproduction position control means 11 performs servo control necessary for optical recording, for example, focus and tracking control for controlling an actuator 18 of the optical head 10, rotation control of a disk for controlling a spindle motor 19, and seek control for controlling an address position. And so on. 12
Is a recording or reproducing position detecting means for detecting a recording or reproducing position on the optical disk 9 by a focus error signal for detecting an out of focus or tracking of the optical head, a tracking error signal, or an address signal on a recording medium. is there. Reference numeral 13 denotes a disturbance detection unit (here, an acceleration sensor) that detects disturbance such as vibration or impact received by the apparatus or the optical head.

Reference numeral 15 denotes an image display means such as an LCD. At the time of reproduction, data on the optical disk 9 read by the optical head 10 (reflected light from the optical disk irradiated with laser light is used as a reflected light amount difference, and
0) is read by the recording / reproducing means 8
, And temporarily stored in the memory 6 as reproduced recording data, converted into original image data by the recording / reproducing signal processing means 7, and displayed on the image display means 15 via the image signal processing means 5. .

Reference numeral 21 denotes a system control unit composed of a control microcomputer that controls the overall control of the apparatus. The system control unit 21 controls the above-described units of the apparatus and controls the entire apparatus. Signal transmission between the image signal processing means 5, the recording / reproducing signal processing means 7, and the system control means is performed through a bus 20. To reproduce the recorded image information, a signal conforming to the format of the display 22 is output by the system control means 21 and
2 is displayed.

FIG. 6 schematically shows a sector portion formed on the disk. Numeral 36 indicates a head sector portion. A PID 35 indicating a physical position on the disk is arranged at the head of the sector, and a data recording unit is arranged subsequently. Here, the PID is a name given to clearly express the ID physically formed on the optical disc 9. The DVD-RAM disk employs a land-groove method, and a data recording portion is allocated to one of a portion called a land and a portion called a groove. The groove 31 is a groove-like portion that is lower than the disk surface by a fraction of the laser wavelength. The land 32 is the disk surface. The lands 32 and the grooves 31 are arranged alternately in the radial direction of the disk. When the light spot 33 scans on the disk during recording or reproduction as indicated by an arrow 34, the grooves 31 and the lands 32 are arranged so as to appear alternately for each turn. The PID 35 is arranged at the center of the land 32 and the groove 31 of the sector in the radial direction of the disk. When the light spot 33 scans, the PID 35-1 and PID 35-2 shifted by one track in the radial direction are detected. The same information is written in the PID 35-1 and the PID 35-2. On the other hand, in the tracking position control, the polarity of the tracking error signal is opposite in the case of the land and in the case of the groove, so it is necessary to switch the polarity of the position control system. The switching of the polarity is performed by the head ID of each track. From the polarity and the information of PID35,
Track positions corresponding to the lands 32 and the grooves 31 can be obtained. Tracks on the disk are divided into a predetermined number of zones by radius, and the disk rotates at the same rotation speed in each zone. The scanning speed is set to be about the same. When the disk 31 is rotated at a speed set as shown in the enlarged view of FIG. 6, the groove 31 slightly undulates in the radial direction so as to have the same frequency in each zone. This undulation is superimposed and detected. This swell is called wobble. The wobble is provided in synchronization with a sector of the disk.
Although no wobble signal is output in the PID section, the digital PLL provided in the recording / reproducing means 8 interpolates and generates a continuous signal during this period, and counts this signal to obtain a signal in the disk circumferential direction. It is possible to detect the relative angle. The PL generated per unit time
The speed of the track portion can be known from the count number of the L signal. Since the track is known, the optical disk 9
Can also be found by calculation.

The operation when the moving picture information photographed by the photographing means 1 is recorded on the optical disk 9 will be described. When the optical disk 9 is loaded in the optical disk device, the spindle motor 19 rotates with the optical disk 9 fixed to the mounting portion. When a predetermined rotation speed is reached, focusing of the light spot is performed, then tracking control is started, and then learning for finding data recording conditions adapted to the optical disc is performed. When these initial operations are completed, the optical disk device is ready for recording, and can record an image taken by the imaging means 1.

An output signal of the photographing means 1 is converted into a digital signal by an A / D converter 4 and input to an image signal processing device 5. The audio signal detected by the microphone 14 is input to the image signal processing device 5 and A / D converted therein. These two digital signals are sent to the recording / reproducing signal processing means 7, subjected to MPEG2 compression processing, and stored in the temporary storage memory 6. When the recording / reproducing means 8 notifies that the recording is ready, the recording / reproducing signal processing means 7 fetches the required amount of compressed data from the temporary storage memory 6 and performs an interleave processing and an error processing according to a predetermined procedure. Correction encoding processing and conversion to the DVD format are performed and output to the recording / reproducing means 8. When the converted data is input, the recording / reproducing means 8 drives the optical head 10 to record the data on the optical disk 9.

When the photographing by the photographing means 1 is started, the data compressed by the MPEG2 by the recording / reproducing signal processing means 7 is stored in the temporary storage memory 6 at a speed of, for example, about 6 Mbits / sec. On the other hand, recording on the optical disk 9 can be performed at a speed of 22 Mbits / sec during continuous recording. Therefore, an appropriate amount of data is stored in the temporary storage memory 6 and the stored data is continuously stored on the optical disk 9.
To save power consumption. When the system control means 21 detects that a predetermined amount of data has been stored in the temporary recording memory 6 and instructs the recording / reproducing signal processing means 7 and the recording / reproducing means 8 to record on the optical disc 9, the recording / reproducing signal processing is performed. The means 7 sequentially executes the scramble processing, the error correction code addition processing, and the conversion processing to the DVD format, and synchronously checks with the recording / reproducing means 8 whether data recording is possible. At the time of data recording, the following three basic
Conditions are required. If any of the following three conditions are not satisfied, recording is immediately stopped.

(1) The focus of the light spot should be on the recording surface of the optical disc within a range that does not hinder recording.

(2) The deviation of the track position of the light spot is within a range that does not hinder recording.

(3) The rotation speed of the optical disk is within an allowable range.

In the above (1) and (2), a reference voltage for both positive and negative polarities is set for each position shift signal, and the absolute value of the position shift signal voltage is larger than the reference voltage. Sometimes, a signal whose condition is no longer satisfied is output. There are two methods for detecting the condition (3). The first method is based on the counting of the wobble signal described in the description of the sector, and the second method is based on an FG signal (not shown) built in the spindle motor 19. The former method has a shorter detection cycle and reflects the eccentricity of the track, so it can be said that the method is accurate. However, when the influence of a defect or the like in question is large, the accuracy may be reduced. On the other hand, although FG does not have high detection accuracy,
Since it is hard to be affected by other parameters, it can be used as backup means when it is determined that the accuracy of the wobble signal is insufficient.

The recording / reproducing means 8 drives an access mechanism (not shown) to move the optical head 10 in the radial direction,
Position to a given track. When the tracking position control system positions the track and the above three conditions are satisfied,
The recording / reproducing means 8 sequentially reads the PID of the sector, and notifies the recording / reproducing signal processing means 7 when the PID matches the PID of the first sector of the block. Upon receiving this signal, the recording / reproducing signal processing means 7 sends the data converted to the DVD format (hereinafter referred to as recording data) to the recording / reproducing means 8. Upon receiving the data, the recording / reproducing means 8 turns on the laser in accordance with the data according to the data after a lapse of a predetermined time from the PID reading time (the light spot is estimated to be located at the head of the data recording area). The light emission intensity is modulated by the pattern to form a recording mark on the optical disc 9. The subsequent processing flow will be described with reference to FIG. After the processing of the first sector is completed, recording is performed in the second sector. The recording / reproducing means 8 sets the time to read the PID (101-yes),
Attempt to read the PID (102). The PID reading operation waits for the PID read value to coincide with a predetermined value during a predetermined time period.
It is expressed as follows. When the PID can be read (102-yes), the data recording start timing is waited for the time that the light spot moves for the distance from the position of the PID to the head of the data recording (103-no). (103-yes), data recording is started and the recording start time timer is reset (104). The recording data of the sector is recorded (107 and 108-no), and the recording is completed.
(108-yes), the processing of the next sector is started. If the next sector is also a sector to be recorded (109-yes), the P of the next sector is
Go to read the ID and return to the top of the flow chart (101). If there is no processing for the next sector, it waits for a command while keeping the position on the track (110). When the PID cannot be read even after the time during which the reading is possible (102-n
o), the recording / reproducing means 8 determines to perform data recording ignoring the PID reading result. The recording / reproducing means 8 causes the recording / reproducing signal processing means 7 to transmit the data converted into the DVD format to the recording / reproducing means 8,
The elapsed time from the start of data recording in the previous sector (104) is counted (105), and the time equal to the movement time of one sector has elapsed (105-yes or 106).
Then, data recording is started, data of the sector is recorded (107), and the recording start time timer is reset (104).

This embodiment is advantageous in that the determination at the time of data recording is simple, the system design is simple, and the system is easy. In addition, the circuit can be downsized, and an effect of power saving can be expected. P
As a method of determining the data recording start timing when the ID cannot be read, besides the above, the PLL signal synchronized with the wobble described above is counted and the PLL from the start of the recording of the previous sector is started. The count value is
The time when the value corresponding to the time required to move by one sector may be used as the data recording start timing. If the response of the PLL cycle can reflect the eccentricity of the optical disc,
The method using the PLL can set the data recording start timing more accurately.

In the case of reproduction, even if the PID cannot be read, if the data recording is normally performed, the logical address is recorded in the recorded data. There is no.

If the data recording section has a defect and the recorded data is erroneously read and the reproduced data has an error, if the defect is small, the data is corrected by the error correction code and the reproduction can be performed accurately. Even if the PID cannot be read and the data cannot be recorded due to a large defect, if there is no error in the other 15 sectors in the same block, the error can be corrected by the error correction code and the data can be accurately reproduced.

FIG. 7 is a diagram showing the recording and reproducing operations of the present invention. In FIG. 7, the disk position 1 and the like can be considered as being replaced with a sector. FIG. 7 illustrates skip recording. In the above embodiment, this corresponds to the case where the sector to be recorded is registered in the defect registration unit. After recording the information from data A to D on the disc-shaped recording medium, disc position 5 is determined to be defective, and position 5 on the disc is skipped to position 6 on the disc.
The recording of the data E is restarted in order. The reproduction is performed in the order of the information on the recording medium. The position 5 is recognized in advance from the disc management information as the position to be skipped, and the position 5 is skipped and reproduced. In this method, data is not recorded on a defect on the disk, so that data reliability is improved. Also, at the time of reproduction, the position of the disk defect is known in advance, and at the time of reproduction, reproduction is performed by skipping the defect position, so that there is little influence on reproduction. In the case of a DVD, as described above, the recording is skipped in units of blocks (16 sectors), so that the recording is delayed by about 22 ms. However, since data for one second or more can be stored in the temporary storage memory 6, there is no problem. FIG. 7-2 shows a recording operation when data is recorded on a defect, corresponding to a case where a defect such as a scratch cannot be recorded but is not known before recording. After information of data A to D is recorded on the disk-shaped recording medium, data E is recorded on the disk position 5 and image data F is sequentially recorded from the position 6 on the disk. The reproduction is performed in the order of information on the recording medium, and the position 5 is reproduced with the image data E as an error. In this method, even if there is a disk defect, the image data is continuously recorded on the address of the disk-shaped recording medium even if an error occurs. Therefore, the amount of image data stored in the memory can be reduced, so that the memory capacity is reduced. Help me. Further, since information indicating the position of the non-recordable area and the like is not written into the defect management registration area for each disk defect, the system design becomes easy.

A second embodiment will be described with reference to FIG. FIG. 2 shows the flow of processing executed by the recording / reproducing signal processing means 7 and the recording / reproducing means 8 at the time of the initial operation when the optical disk 9 is loaded into the optical disk device and at the time of data recording. In this embodiment, the recording / reproducing means 8 performs the initial operation when the disc is loaded on the optical disc.
Play the data of the defective sector registered in (20)
2) The list is read into the recording / reproducing signal processing means 7 in advance (201). At the time of data recording, the recording / reproducing signal processing means 7 inputs the amount of data to be recorded on the optical disk 9 and the recording area (block section) on the optical disk from the system control means 21 (203), and determines the amount of data to be read from the temporary storage memory 6. Calculate (204) and read data from the temporary storage memory 6 (205). The block section to be recorded is calculated from the read data amount and the already recorded block sections on the optical disk 9 (206). The block section to be recorded is compared with the read defect list to check whether the block section to be recorded contains a defective sector (207). If not included, the read data is scrambled (21
0), adding an error correction code (211), converting to a DVD format (212), and outputting it to the recording / reproducing means 8.
Thereafter, the same processing as the corresponding processing in the first embodiment is performed (213, 214, 215). When the recording / reproducing means 8 gives the report of the recording to the recording / reproducing signal processing means 7 (21
6), the recording / reproducing signal processing means 7 determines the amount of data read from the temporary storage memory from the remaining amount of data to be recorded (204). Thereafter, the flow returns to the above. The defective sector in the block section to be recorded was searched (20
7) As a result, if there is a block section containing a defect, the block number is registered in a predetermined temporary memory, and the data block to be recorded in the block section is assigned to the next block section of the block section. , And subsequent data are sequentially shifted (209), and scramble processing (21)
0), adding an error correction code (211), and converting to a DVD format (212). Subsequent steps are the same as in the case where there is no defective sector. If the recording / reproducing signal processing means 7 delays the determination of skipping due to some influence and cannot convert the data to the DVD format in the recording / reproducing signal processing means 7 in time, the optical disk 9 waits until the next rotation. Here, the defective sector is registered as a defect when the optical disc 9 is manufactured, and is read as a defective sector in the initial processing of the current recording and registered in the recording / reproducing signal processing means 7. The registered defective sectors include those that cannot record data normally, those that cannot reproduce data, and those that cannot read PID.

Next, a third embodiment will be described. Third
In the embodiment of the present invention, a re-recording attempt (retry) is performed once,
This is to reduce recording failures. The configuration of the device is the first
This is the same as the embodiment. The operation will be described below with reference to FIG. FIG. 3 shows an outline of the flow of processing in a block. PI of the first sector of the data recording block
Until D is confirmed, it is the same as in the first embodiment. The recording / reproducing means 8 sets the values N and M of the PID read failure counter to 0 at the beginning of the block (301). After recording data in the first sector, recording is performed in the second sector. The recording / reproducing means 8 tries to read the PID at the time when the PID should be read (302-yes) (303). PI
The expression for reading D is the same as that in FIG. When the PID can be read, the process is the same as that of the first embodiment except that the value N of the PID read failure counter is reset to 0 (308). If the PID has not been read even after the time during which the reading is possible (303-no), the recording / reproducing means 8 determines whether or not the value of M is 0 (311). When M = 0 (311-no), the value of the sector to be recorded is held, M is set to 1 (310), and the process waits for a short time from the time of one rotation of the disk (309). After that, the PID is read again (302). Perform the same processing as before, and
Is read, the same processing as when the above reading is performed is performed. When reading the same PID fails again (303-no)
Since M = 1 (311-yes), 1 is added to the value N of the PID read failure counter and M = 0 is set (312). Then, the value N of the PID read failure counter is determined, and when N does not exceed a predetermined positive value (313-no)
As in the first embodiment, even if the reading of the PID fails, the data is recorded (304, 305, 306), and the process returns to the reading of the PID to process the next sector. When the recording is completed (307-no), the process waits for the subsequent processing (317). By the above flow, when N does not exceed the predetermined value, that is, PI
If the number of sectors for which reading of D fails fails to exceed a predetermined value, the above operation is repeated. Alternatively, it waits for the next process.
However, when N exceeds a predetermined value (313-yes), ie,
PID reading is retried once, and PI
When the number of sectors that continuously fail to read D exceeds a predetermined value, the recording / reproducing unit 8 stops the subsequent data recording until the end of the block (314, 315). Then, the process proceeds to the next block (316).

When the reading of the PID fails, the recording / reproducing means 8 attempts to reread the PID of the sector in which the reading failed in the present embodiment once. If there is a cause in the vibration of the device, etc., determine that the cause has disappeared,
Since rereading of the PID is performed, it may take time, and the rotation is not necessarily performed immediately after the failure. If the reading of the PID fails due to dust temporarily attached to the surface of the optical disc 9 or a track position shift due to an external impact, there is a high possibility that the retry will succeed. If the reading of the PID of a predetermined number of sectors in the middle of the block fails consecutively, it is highly likely that it is a large dust or defect, and in that case, the detection result of the focus error signal or the track shift signal also causes an abnormality. May have
Data recording for subsequent sectors in the block is stopped. The predetermined number is preferably determined by actually using the number. Due to the small tolerance of the focus control system and the track control system, the predetermined number will be 5 or less. If the retry fails, the possibility of improvement by the retry is low and there is no time to spare, so the retry is not performed again.

[0041]

As described above, according to the present invention,
In a disk device that continuously records image information, when data is recorded on an optical disk and the ID of a sector in which the data is to be recorded cannot be read, a method of directly performing data recording is a simple system control system. In this case, the operation can be simplified and the power consumption can be reduced.

In a disk device for continuously recording image information, a defective portion registered at the time of manufacturing the disk is checked prior to data recording, and a block portion including a defective sector is skipped and recorded. If the ID of the sector in which data is to be recorded cannot be read,
In the method of performing data recording processing as it is, skip recording that requires processing time is performed only in blocks including sectors that have been registered as defects that can be prepared in advance, and thus can be realized without an LSI that performs high-speed processing. . Therefore, it is possible to relatively easily reduce a main part of an error due to a disk defect.

In a disk device for continuously recording image information, when recording data on an optical disk, if the ID of a sector in which data is to be recorded cannot be read,
The method of once re-reading the PID, performing data recording processing, and not retrying even if the retry fails can be realized by a simple system control system, the extra time required is short, and the PID reading is performed. The effect of reducing the failure is great.

The above method simplifies the processing of the system when data is recorded on the disk, so that it is necessary to guarantee that data can be continuously recorded on the disk. It is suitable as a recording method. However, the application is not limited to the disk camera alone, and it goes without saying that the invention can be applied to an apparatus or a method for continuously recording data on a disk.

[Brief description of the drawings]

FIG. 1 is a diagram showing one embodiment of the present invention, showing a data recording sequence.

FIG. 2 is a diagram showing a second embodiment of the present invention, showing a data recording sequence.

FIG. 3 is a diagram showing third and sixth embodiments of the present invention.
4 shows a data recording sequence.

FIG. 4 is a diagram illustrating a configuration of a disk device according to an embodiment of the present invention.

FIG. 5 is a diagram illustrating a configuration around a head unit according to the embodiment of the present invention.

FIG. 6 is a schematic diagram of a physical format of a disk according to the embodiment of the present invention.

FIG. 7 is an explanatory diagram of a recording method when there is a defect in stream recording.

[Explanation of symbols]

1. Imaging means 2. Imaging optical system 3. Image sensor unit 4. A / D converter 5. Image signal processing means 6. Recording / reproduction signal processing means 7. Memory 8. Recording / reproduction means 9 Recording media
10. Optical head 11. Recording and / or reproduction position control means 12. Recording and / or reproduction position detection means 13. Disturbance detection means 14. Microphone 15. Image display means 16. Light emitting element (semiconductor) Laser) 17. Light receiving element (photodiode) 18. Actuator 19 Spindle motor 20 Bus 21 System control means 22 Display

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G11B 7/004 G11B 7/004 A 20/10 20/10 C 20/12 20/12 F term (Reference) 5D044 BC04 CC04 DE61 EF03 5D090 AA01 BB04 CC01 CC06 DD03 DD05 FF30 FF38 GG30 HH01

Claims (6)

[Claims] 1. A detection reference for detecting a spiral displacement or a concentric radial displacement that is formed in advance in a radial direction is provided, and a predetermined amount is provided at predetermined intervals in a circumferential direction along the detection reference. Section (sector) in which to store data
The recording means is positioned in accordance with the detection criterion with respect to the disk in which the information (ID) indicating the position of the image is recorded in advance, and the image information signal is combined with a plurality of the predetermined amount of data into one processing unit (block). Recording means for converting and recording into recording data for recording on the disc-shaped recording medium; reproducing means for converting recording data reproduced from the disc-shaped recording medium into an image information signal; and A memory for temporarily storing, a recording and / or reproducing position detecting means for detecting an error from a predetermined position such as a focus or tracking of the head, a focus and tracking control of the head, a rotation control of the disk-shaped recording medium, and the like. A disk drive comprising: a recording and / or reproducing position control means; and a system control means for controlling the entire system, comprising: Means for detecting the position display information (ID) of the storage section (sector), and while the recording data is being recorded in the data storage section (sector), reading of the position display information (ID) of the data storage section is performed. If the recording is not completed, the position of the recording data to be recorded in the data storage section (sector) is estimated in the data storage section (sector), and the recording data is recorded in a predetermined amount. Optical disk device. 2. A detection reference for detecting a spiral displacement or a concentric radial displacement formed in advance in a radial direction is provided, and a predetermined amount is provided at predetermined intervals in a circumferential direction along the detection reference. The position display information (ID) of the data storage section (sector) is recorded in advance, and the result of examining a defective section (defective sector) in which data cannot be recorded at the time of manufacturing is checked on a disk recorded in a predetermined range. Recording means for positioning a recording means in accordance with the detection criterion, converting the image information signal into recording data for recording on the disc-shaped recording medium as the processing unit (block), and recording the disc; Means for converting the recording data reproduced from the recording medium into an image information signal, a memory for temporarily storing the recording data, and a head for focusing and tracking. Recording and / or reproduction position detection means for detecting an error from a fixed position; recording and / or reproduction position control means for controlling the focus and tracking of the head, rotation control of the disk-shaped recording medium; And a system control means for controlling the position of the data storage section (sector). The data recording area of the disk is divided by the processing unit amount. Before the recording data is recorded, data of the processing unit (block) to which the defective partition is assigned is extracted, and data after the processing unit (block) is replaced with the defect data. The data storage section is allocated to a block section subsequent to the block section including the block section and the data storage section while recording in the data storage section (sector). When the position display information (ID) of the image cannot be read, the recording data to be recorded in the data storage section (sector) is estimated by estimating the recording position in the data storage section (sector), and the recording is performed. An optical disk device characterized by recording data by a predetermined amount. 3. A detection criterion for detecting a spiral displacement or a concentric radial displacement, which is formed in advance, is provided, and a predetermined amount is provided at predetermined intervals in a circumferential direction along the detection criterion. A recording means for positioning the display information (ID) of the data storage section (sector) with respect to a disk in which the data storage section is previously recorded in accordance with the detection criterion, and recording an image information signal on the disk-shaped recording medium. Recording means for converting and recording into recording data; reproducing means for converting recording data reproduced from the disc-shaped recording medium into an image information signal; memory for temporarily storing the recording data; Recording and / or reproducing position detecting means for detecting an error from a predetermined position; focus and tracking control of the head; Position display information and recording and / or reproducing position control means of the rotation control of the system control unit controls the whole, a disk device provided with the data storage sectors (sector) (ID)
When the recording data is recorded in the data storage section (sector), if the position display information (ID) of the section cannot be read out, the recording is interrupted, and only once. Positioning is performed again at the time of the next rotation of the disc, reading of the position display information (ID) is attempted, and recording data is continuously recorded from the interrupted portion irrespective of the reading result, and the next data storage section is recorded. An optical disk device characterized by shifting to (sector) processing. 4. A method for estimating a position to be recorded in a data storage section (sector), comprising: setting a data recording start timing to a predetermined time defined as a standard with respect to a sector in which data has been recorded immediately before; 4. The disk device according to any one of items 1 to 3, wherein data recording is started at a delayed timing. 5. When the recording data is recorded in the data storage section (sector) and the position display information (ID) of the data storage section cannot be read, the data in the processing unit (block) is read. If the position display information (ID) of the data storage section (sector) to be stored cannot be read, and if the data display section (sector) of two or more is continuous, data recording in the same processing unit (block) is performed. And stopping thereafter.
An optical disk device according to the item. 6. While the recording data is being recorded in the data storage section (sector), position display information (I
If the reading of D) cannot be performed, the recording is interrupted,
Position once again after the next rotation of the disc,
Attempt to read the position display information (ID) of the section,
If the reading is not successful, and if reading has failed consecutively from the data storage section (sector) a predetermined number of times before the data storage section (sector), the subsequent recording in the processing unit (block) is performed. 4. The optical disk device according to claim 3, wherein the operation is stopped, and if not, processing of the next data storage section (sector) is performed as usual.