JPH097314A - Image data processing device - Google Patents

Abstract

(57) [Abstract] [Purpose] To enable continuous image data to be recorded on a disk-shaped recording medium without loss and to output image data reproduced from the disk-shaped recording medium continuously with a simple configuration. The image data DV1 to be recorded in the alternative area is temporarily saved in the storage means 19 and recorded, and the image data previously recorded in the alternative area is stored in the storage means and output at a corresponding timing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image data processing apparatus, in which image data to be recorded in an alternative area is temporarily saved and stored in a storage means, and image data previously recorded in the alternative area is stored in the storage means. By storing the image data in, and outputting at the corresponding timing, continuous image data can be recorded without being damaged and reproduced image data can be continuously output with a simple configuration.

[0002]

2. Description of the Related Art Conventionally, in a magneto-optical disk or the like, an area where data cannot be correctly recorded / reproduced (that is, a defect area) may occur due to scratches or the like at the time of manufacture. Desired data can be recorded and reproduced by using an alternative area formed on the circumferential side.

That is, in the magneto-optical disk, when a prepit is formed and formatted, for example, this defect area is detected in sector units, and data relating to the sector of the defect area is recorded in the recording area of the management data on the inner circumference side. Will be recorded.

As a result, in the magneto-optical disk device, data sequentially input with this management data as a reference is recorded in sector units, and sectors in the defect area (hereinafter referred to as defect sectors) are located on the inner peripheral side. The recording is performed in the alternative area, so that the apparently specified recording area is continuously secured.

[0005]

By the way, it would be convenient if this type of magneto-optical disk device or the like could be used as an external storage device of video equipment. In this case, it is conceivable that the image data sequentially input from the video equipment of this kind can be used as an external storage device by sequentially recording the image data in a continuous area of the magneto-optical disk.

However, in a magneto-optical disk or the like, a defect may occur. Therefore, when continuous image data is recorded, continuous area access must be interrupted to access the alternative area. There are cases when it must be done. In this case, in the magneto-optical disk device, since it takes time to seek, recording of continuous image data is temporarily interrupted, and eventually, it becomes impossible to record a part of continuously input image data. That is, in this case, the magneto-optical disk device has a problem that image data cannot be recorded in real time.

A similar case occurs during reproduction, and eventually there is a problem that image data cannot be continuously transmitted. By the way, by increasing the data transfer rate for the magneto-optical disk, a time margin is formed,
A method of performing this kind of alternative process is also conceivable,
In this case, there is a problem that the entire configuration becomes complicated because the transfer rate is increased.

The present invention has been made in consideration of the above points, and is an image data that can record continuous image data without damaging it and output reproduced image data continuously with a simple structure. It is intended to propose a processing device.

[0009]

In order to solve such a problem, in the present invention, continuous image data is sequentially allocated and recorded in continuous areas of a disk-shaped recording medium. At this time, when a partial area of the continuous area is a defect area, the image data assigned to the defect area is temporarily stored in the storage unit, and after the recording in the continuous area is completed, the image data is temporarily stored in the storage unit. The stored image data is recorded in an area which is an alternative to the previous defect area.

Image data is reproduced from the alternative area corresponding to the defect area of the disk-shaped recording medium and stored in the storage means, and then the image data is sequentially reproduced and output from the continuous area of the disk-shaped recording medium. However, when a partial area of this continuous area is a defect area, the image data reproduced from the previous alternative area is output from the previous storage means.

[0011]

By continuously allocating continuous image data to continuous areas of the disc-shaped recording medium and recording the same, even if the data transfer rate to the disc-shaped recording medium is not increased,
It is possible to record continuous image data. At this time, when a partial area of the continuous area is a defect area,
After the image data assigned to the defect area is temporarily stored in the storage means and recording in the continuous area is completed,
If the image data temporarily stored in this storage means is recorded in an area that is an alternative to the previous defect area, the image data assigned to the defect area can be temporarily saved and then recorded again, resulting in the loss of continuous image data. Can be recorded without.

Image data is reproduced from the alternative area corresponding to the defect area of the disk-shaped recording medium and stored in the storage means, and then the image data is sequentially reproduced from the continuous area of the disk-shaped recording medium and output. However, when a partial area of this continuous area is a defect area, if the image data reproduced from the previous alternative area is output from the previous storage means, the image data temporarily saved in the storage means beforehand is The area can be output at the timing of reproducing, and the continuous image data can be transmitted without interruption even if the data transfer rate from the disc-shaped recording medium is not increased.

[0013]

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

FIG. 1 is a block diagram showing an image data recording system according to an embodiment of the present invention. In this image data recording system 1, a video signal SV obtained from an image pickup device 2 is sent by a magneto-optical disk device 3. Record. That is, the image pickup apparatus 2 uses the lens 4 to allow the CCD solid-state image pickup device (C
The image of the subject is formed on the image pickup surface of
An image signal SV is generated by processing the output signal of the solid-state image sensor 5 by a prescribed signal processing circuit (not shown).

The magneto-optical disk device 3 uses the video signal S
The V is subjected to analog-digital conversion processing to generate continuous image data, the image data is recorded on the magneto-optical disk 6, and the image data recorded on the magneto-optical disk 6 is reproduced and output.

Here, the magneto-optical disk 6 is formed so that desired data can be recorded by a thermomagnetic recording method.
Further, it is formed so as to be able to reproduce the recorded data by utilizing the magnetic Kerr effect, and is pre-formatted in advance by a prescribed formatter so that these desired data can be recorded and reproduced in sector units.

In the magneto-optical disk 6, defect sectors are detected during the pre-formatting, and the position information of these defect sectors is recorded in the allocation table formed on the inner peripheral side and part of the alternative area. It is done like this. As a result, the magneto-optical disk 6
Is capable of accessing each sector on the basis of this allocation table and executing a recording / reproducing process by using the sector of the alternative area as necessary to surely record / reproduce desired data.

In the magneto-optical disk device 3, a spindle motor 7 chucks the magneto-optical disk 6 around a rotating shaft, and is controlled by a servo circuit 8 to rotate the magneto-optical disk 6 at a prescribed rotational speed.

The optical pickup 9 is arranged so as to face the modulation coil 10 with the magneto-optical disk 6 interposed therebetween, and is driven by the servo circuit 8 to be movable in the radial direction of the magneto-optical disk 6 together with the modulation coil 10. It is done like this. As a result, in the magneto-optical disk device 3, the optical pickup 9 and the modulation coil 10 are sought as needed to access the alternative area or the like.

Further, the optical pickup 9 emits a laser beam from a built-in laser diode, and the laser beam is focused on the information recording surface of the magneto-optical disk 6 by the objective lens 11. Further, the optical pickup 9 receives the returned light of the laser beam by a prescribed optical system, and generates and outputs a tracking error signal, a focus error signal, a reproduction signal, etc. from the result of the received light.

Further, while the optical pickup 9 maintains the light quantity of the laser beam applied to the magneto-optical disk 6 at a prescribed light quantity at the time of reproduction, at the time of recording, the light quantity at the time of recording is more than that at the time of recording. The information recording surface of the magneto-optical disk 6 is sequentially and locally heated by intermittently raising the amount of light.

The RF amplifier 12 has the optical pickup 9
The output signal of is amplified with a specified gain. RF amplifier 1
In the output signal of the optical pickup 9, the reference numeral 2 binarizes a reproduction signal with a prescribed threshold value and converts it into a binarized signal, and the binarized signal is converted into a servo circuit 8, an address decoder 13 and a digital signal. Output to the signal processing circuit 14.

The servo circuit 8 receives the tracking error signal and the focus error signal from the RF amplifier 12, and moves the objective lens 11 left and right and up and down with reference to the tracking error signal and the focus error signal, whereby tracking control and Focus control. Further, the servo circuit 8 detects the pit forming period formed on the magneto-optical disk 6 by pre-formatting by taking in the binarized signal at a prescribed timing, and drives the spindle motor 7 to rotate based on the period detection result. As a result, the magneto-optical disk 6 is rotationally driven under specified conditions. The servo circuit 8 is controlled by the system controller 16 to drive a prescribed seek mechanism to cause the optical pickup 9 and the modulation coil 10 to seek.

Similarly, the address decoder 13 detects the address information recorded on the magneto-optical disk 6 by pre-formatting by fetching the binarized signal at a prescribed timing, and the address information is supplied to the digital signal processing circuit 14. Output. As a result, the magneto-optical disk device 3
In, the position information of the laser beam irradiation position can be detected in units of sectors.

The digital signal processing circuit 14 is controlled by the system controller 16 to switch its operation, and at the time of reproduction, sequentially latches the binary signal at a prescribed timing, thereby converting the binary signal into serial data. . Further, the digital signal processing circuit 14 decodes this serial data, then deinterleaves,
An error correction process is performed, and thereby the image data recorded on the magneto-optical disk 6 is reproduced.

On the other hand, the digital signal processing circuit 14
At the time of recording, after adding the error correction code or the like to the image data DV2 which is sequentially input, it is converted into the specified data structure, then converted into serial data, and this serial data is output to the driver 17. The driver 17 drives the modulation coil 10 based on this serial data.

As a result, the magneto-optical disk device 3 is formed so that the system controller 16 can switch the entire operation to sequentially record the image data DV2 input to the digital signal processing circuit 14.
During reproduction, the image data reproduced from the magneto-optical disk 6 can be output via the digital signal processing circuit 14.

The recording data processing circuit 18 performs analog-digital conversion processing on the video signal SV obtained from the image pickup device 2 to convert it into a digital video signal, further compresses the digital video signal, and thereby successively image data. Generate DV1.

A memory area is formed in the memory 19 so that the image data DV1 for a plurality of frames can be recorded. At the time of recording, the memory area is sequentially and cyclically used to output the image data output from the recording data process circuit 18. Store DV1. Further, the memory 19 is controlled by the system controller 16 to store the image data DV1, so that the image data DV1 to be recorded in the alternative area of the magneto-optical disc 6 is stored once.
1 is held as it is, and when the recording process on the magneto-optical disk 6 other than this alternative area is completed, the stored image data DV1 is output.

As a result, in the magneto-optical disk device 3, the image data DV1 assigned to the defect sector is temporarily saved in the memory 19, and then the other image data DV1 is completely recorded and recorded on the magneto-optical disk 6. It is done like this.

The selection circuit 20 is the system controller 1
6, the contact is switched to output the image data DV1 output from the recording data processing circuit 18 to the digital signal processing circuit 14 during recording, and then the contact is switched to output the image data DV output from the memory 19.
1 is output to the digital signal processing circuit 14.

The system controller 16 is formed by a microcomputer that controls the operation of the magneto-optical disk apparatus 3 as a whole, and responds to the operation of a prescribed operator, or responds to a control command separately input through the interface. And switch the whole operation.

That is, the system controller 16 operates the image data DV according to the operation of these operators and the control command.
When the recording of 1 is designated, the unrecorded sector of the magneto-optical disk 6 is detected from the allocation table of the magneto-optical disk 6, and the servo circuit 8 is controlled based on the detection result to correspond the optical pickup 9 and the modulation coil 10. Move to the start position of the unrecorded sector. Further, the system controller 16 designates the addresses of the continuous unrecorded sectors to the digital signal processing circuit 14 and then selects the selection circuit 20.
Is set on the recording data process circuit 18 side, and recording of the image data DV1 is started by this.

As shown in FIG. 2, this causes the system controller 16 to sequentially input the image data DV1.
(FIG. 2 (A)) shows consecutive sectors S of the magneto-optical disk 6.
0, S1, ... Are sequentially recorded (FIG. 2 (B)). In this recording process, the system controller 16 detects the defective sector Si from the allocation table of the magneto-optical disk 6 and outputs a control signal to the memory 19 for the image data DV1 to be recorded in this sector Si. It is once held in the memory 19 (Fig. 2
(C)). Further, the system controller 16 omits the recording process for this sector Si, and sequentially records the corresponding image data Di + 1, ... From the following sector Si + 1.

When the recording of the image data DV1 is completed during the period designated by the user in this way, the system controller 16 controls the servo circuit 8 based on the allocation table to thereby cause the optical pickup 9 and the modulation coil. Move 10 to the alternate area.

Subsequently, the system controller 16 designates the alternative sector formed in this alternative area, switches the contact of the selection circuit 20 to the memory 19 side, and the memory 19
The image data DV1 temporarily saved in is input from the memory 19 to the digital signal processing circuit 14. As a result, the system controller 16 records the image data of the defective sector temporarily saved in the memory 19 in the sector SDi of the alternative area, and subsequently records the series of processing results in the allocation table.

As a result, in the magneto-optical disk device 3, the image data DV1 can be recorded without seeking the alternative area while the continuous image data DV1 is being input. It is possible to record in real time without losing a part of the continuous image data DV1 in the configuration.

FIG. 3 is a block diagram showing an image data reproducing system using the magneto-optical disk device 3. In the image data reproducing system 25, the magneto-optical disk 6 is used.
The image data recorded in (1) is reproduced and displayed on the monitor 26.

When reproducing the magneto-optical disk 6 in this manner, the magneto-optical disk device 3 of the selection circuit 20 outputs the image data DV2 output from the digital signal processing circuit 14 to the reproduction data processing circuit 28. Switch the connection. The memory 19 is switched in connection so that the image data DV2 output from the digital signal processing circuit 14 is stored and output to the other contact of the selection circuit 20, whereby the magneto-optical disk device 3 records. Similarly to the case, the image data of the defect sector is temporarily saved in the memory 19 and output.

On the other hand, the reproduction data processing circuit 28
In contrast to the recording data processing circuit 18, the image data DV1 output from the selection circuit 20 is processed to convert the image data DV1 into a video signal SV, and the video signal SV is displayed on the monitor 26. It also outputs to other external equipment.

When the reproduction of the magneto-optical disk 6 is designated, the system controller 16 detects the address of the sector in which the image data is recorded from the allocation table of the magneto-optical disk 6. Further, the system controller 16 judges from the allocation table whether or not a part of the designated image data is recorded in the alternative area (that is, when there is a defect sector in the area to be reproduced), and here When a negative result is obtained in step S1, the address of the corresponding sector is specified in the digital signal processing circuit 14, and then the contact of the selection circuit 20 is set on the side of the digital signal processing circuit 14 to start the reproduction of the image data DV1. . As a result, in the magneto-optical disk device 3, the image data D recorded in consecutive sectors is recorded.
V1 is continuously reproduced and displayed on the monitor 26.

On the other hand, when a part of the designated image data is recorded in the alternative area, the system controller 16 controls the servo circuit 8 with the allocation table as a reference, so that the optical pickup 9 and the modulation circuit are controlled. Move coil 10 to the alternate area.

In this state, as shown in FIG. 4, the system controller 16 outputs address data to the digital signal processing circuit 14 and reproduces the image data Di recorded in the alternative area in advance (FIG. 4 (A)). ). Further, at this time, the system controller 16 switches the operation of the memory 19 and temporarily saves the image data Di reproduced from the alternative sector in the memory 19 (FIG. 4 (B)).

When the image data Di previously recorded in the alternative area is saved in the memory 19 in this way, the system controller 16 subsequently seeks the optical pickup 9 and the modulation coil 10 to the sector of the designated image data, Reproduction of continuous image data D0, D1, ... Is started (FIG. 4 (A)). At this time, the system controller 1
Reference numeral 6 designates a contact of the selection circuit 20 as a digital signal processing circuit 1
The image data D0, D1, ... Which are set on the fourth side and are sequentially reproduced by this are supplied to the reproduction data process circuit 28.

At this time, the system controller 16
Detects a defective sector Si from the allocation table, and selects the sector Si for this sector Si.
The contact point of is switched to the memory 19 side, and the image data Di of the alternative area saved in advance in the memory 19 is output (FIG. 4).
(C)).

As a result, the magneto-optical disk device 3 can output continuous image data without interruption with a simple structure, and can output these image data to an external device in real time.

In the above configuration, the video signal SV output from the image pickup device 2 is converted into continuous image data DV1 in the recording data process circuit 18, and this image data DV1 is defined in the digital signal processing circuit 14 by a prescribed data structure. Is converted into serial data, and the modulation coil 10 is driven by this serial data to be recorded on the magneto-optical disk 6.

During this recording, continuous image data DV1
Are sequentially recorded in consecutive unrecorded sectors of the magneto-optical disk 6. If a defect sector exists in this continuous sector, the image data Di assigned to this defect sector is temporarily saved in the memory 19,
When the recording of the other image data DV1 is completed, the saved image data is input to the digital signal processing circuit 14 and recorded in the alternative area.

On the other hand, the image data DV1 recorded on the magneto-optical disk 6 is reproduced by the RF amplifier 12 and then demodulated by the digital signal processing circuit 14 and output. At the time of this reproduction, if a defective sector exists in consecutive sectors used for reproduction,
After the corresponding image data Di recorded in the alternative area is reproduced in advance and saved in the memory 19, it is read from the memory 19 at the timing of the defect sector and is inserted at a corresponding position between consecutive image data DV1. Is output. As a result, continuous image data DV1
The data is reproduced from the magneto-optical disk 6 and continuously output without interruption.

According to the above configuration, the image data assigned to the defect sector is saved in the temporary memory, and the other image data is completely recorded and recorded in the alternative area. Image data can be recorded without being damaged. Further, by reproducing the image data assigned to the defect sector in advance from the substitute area and inserting the image data reproduced at the timing of the defect sector and outputting the image data, continuous image data can be continuously output.

In the above embodiments, the case where the present invention is applied to the magneto-optical disk device has been described, but the present invention is not limited to this, and various phase change type optical disk devices, further hard disk devices, etc. The present invention can be widely applied to the case of recording continuous image data on a disc-shaped recording medium and further to the case of reproducing continuous image data from a disc-shaped recording medium.

[0052]

As described above, according to the present invention, the image data assigned to the defect area is saved in the temporary storage means, and the recording of the other image data is completed and recorded in the alternative area. With such a configuration, continuous image data can be recorded without being damaged. Further, by reproducing the image data assigned to the defect area from the substitute area in advance and inserting the reproduced image data for output, continuous image data can be continuously output.

[Brief description of drawings]

FIG. 1 is a block diagram showing an image data recording system according to an embodiment of the present invention.

FIG. 2 is a signal waveform diagram for explaining the operation of FIG.

FIG. 3 is a block diagram showing an image data reproducing system using the magneto-optical disk device of FIG.

FIG. 4 is a signal waveform diagram for explaining the operation of FIG.

[Explanation of symbols]

 1 image data recording system 2 imaging device 3 magneto-optical disk device 6 magneto-optical disk 16 system controller 19 memory 20 selection circuit 25 image data reproducing system 26 monitor

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location G11B 20/12 103 9295-5D G11B 20/12 103 H04N 5/781 H04N 5/781 D 5/85 5/85 Z

Claims (2)

[Claims] 1. Consecutive image data is sequentially allocated and recorded in a continuous area of a disc-shaped recording medium, and when a partial area of the continuous area is a defect area,
The image data assigned to the defect area is temporarily stored in the storage means, and after the recording in the continuous area is completed, the image data temporarily stored in the storage means is used as an area alternative to the defect area. An image data processing device characterized by recording. 2. The image data is reproduced from an alternative area corresponding to the defect area of the disk-shaped recording medium and stored in the storage means, and then the image data is sequentially reproduced from a continuous area of the disk-shaped recording medium. Output, when a part of the continuous area is a defect area,
An image data processing device, wherein image data reproduced from an alternative area of the defect area is output from the storage means.