JP2002260368A - Information recording apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that processing during the takeout of a disk takes time because even an AV management area is sought to write AV management information during the takeout of the disk or powering off, accordingly long distance seeking is required. SOLUTION: The AV management area is provided in each zone of a disk 1, and the AV management information is recorded on an AV management area of a zone in which a recording head is currently positioned or the nearest zone from the current position of the recording head, when the AV management information is recorded on the disk 1. Moreover, a nonvolatile memory 14 is provided in a disk cartridge to record the address of the AV management information on the memory 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording apparatus for recording an information signal on an information recording medium such as an optical disk or a magneto-optical disk.

[0002]

2. Description of the Related Art Conventionally, in a disk recording / reproducing apparatus for recording / reproducing information signals on a recording medium such as an optical disk or a magneto-optical disk, AV management information for managing address information of AV data such as audio signals and video signals is used. It is recorded in the AV management information area on the inner circumference of the disc.

FIG. 2 shows a format of a conventional recording disk. The information area 19 includes a lead-in area 16, a recordable area 20, and a lead-out area 18. The lead-in area 16 is located at the innermost circumference of the disk, and TOC (table of contents) information such as a laser power required for recording, a recordable area, and an address of AV management information is recorded in advance. Recordable area 20 is AV management information area 15
And a program area 17. The AV management information area 15 is an area where AV management information is recorded, and the program area 17 is an area where information signals are recorded.
In the lead-out area 18, an address for returning to the program area 17 when the optical pickup jumps out of the program area 17 to the outer periphery is recorded.

[0004]

Conventionally, in an optical disk or a magneto-optical disk device, AV management information such as address information and text information of AV data is stored in an AV management information area 15.
It is recorded in. In this case, when the disk is taken out of the apparatus or when the power is turned off, the seek to the AV management information area 15 is performed, and the AV management information is written. Therefore, A
When the head is located far from the V management information area 15, it is necessary to perform a long-distance seek to the AV management information area 15 and reset the disk rotation speed, and it takes time to take out the disk and turn off the power.

When a disc is inserted or the power is turned on, the seek is performed to a predetermined position specified by the AV management information 15 after reading the AV management information recorded in the AV management information area 15, so that the seek operation is performed. It took time.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and has as its object to provide an information recording apparatus capable of reducing the processing time when a recording medium is taken out or inserted, or when power is turned on or off. Is to do.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an information recording apparatus for recording an information signal and AV management information for managing the recorded information signal on an information recording medium. Each zone is provided with an AV management area for recording the AV management information. When the AV management information is recorded on the recording medium, the recording for recording the information on the recording medium is performed. This is achieved by an information recording apparatus that records AV management information in an AV management area of a zone where a head is currently located or a zone closest to a current location of the recording head.

It is another object of the present invention to provide an information recording apparatus for recording an information signal and AV management information for managing the recorded information signal on an information recording medium, wherein a non-volatile memory is provided in a cartridge of the recording medium, In addition, the recording area of the recording medium is divided into a plurality of zones, and each zone is provided with an AV management area for recording the AV management information. In this case, the AV management information is recorded in the zone where the recording head for recording the information on the recording medium is currently located, or in the AV management area of the zone closest to the current position of the recording head, and the address of the recorded AV management information. Is written in the non-volatile memory.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a block diagram showing the configuration of an embodiment of the information recording / reproducing apparatus of the present invention. In FIG. 1, reference numeral 1 denotes a magneto-optical disk (hereinafter, referred to as a disk) serving as an information recording medium. The disk 1 is housed in a disk cartridge and is replaceable for the device. A non-volatile memory 14 is provided in the disk cartridge, and writes the address of the AV management information as described later in detail. The disk 1 is rotated by driving a spindle motor 11.

The recording magnetic head 2 is used for recording on the disk 1 during recording.
Head, optical pickup 6 for applying a recording magnetic field to the head
Is an optical head for recording or reproducing information by irradiating the disk 1 with a light beam. Reference numeral 3 denotes a recording RF amplifier, 4 denotes an encoder circuit, 7 denotes a reproduction RF amplifier, 8 denotes a decoder circuit, and 10 denotes a seek motor. The magnetic head 2 for recording and the optical pickup 6 move in the radial direction of the disk 1 by the drive of the seek motor 10. A motor control circuit 12 controls the spindle motor 11 and the seek motor 10.
Reference numeral 3 denotes a control circuit for controlling the entire apparatus. Control circuit 13
Controls the encoder circuit 4, the decoder circuit 8, the motor control circuit 12, and the like, and performs processing of a mechanism and the like and sub-decode data processing based on information from a key input terminal and a mechanical switch input terminal (not shown). Control circuit 1
Reference numeral 3 denotes a system controller using a microcomputer.

FIG. 2 shows the format of the disk 1. The information area 22 includes a lead-in area 21, a recordable area 23, and a lead-out area 25. The lead-in area 21 is located at the innermost periphery of the disk, and TOC (table of contents) information such as a laser power required for recording, a recordable area, and an address of AV management information is previously recorded.
The recordable area 23 includes a program area 24. In the lead-out area 25, a pit row, a group, and the like are recorded.

The program area 24 shown in FIG. 2 is divided into a plurality of zones 1 to n as shown in FIG. 3, and each zone is provided with a management area 26 for writing AV management information. I have. That is, AV management information is recorded in the program area 24 at a specific location of each zone. When recording AV management information, the same AV management information is written in a predetermined zone a plurality of times, and when reading, the AV management information that has been successfully read first is used.

The AV management information includes a video table for managing information of one recording (pause to pause) and a scene table indicating a continuous recording area on the disc. FIG. 4 shows an example of the format of the AV management information.
The video table has a scene number 32 indicating a start address of a scene table in which information of audio data and video data is recorded, and an attribute is recorded in 33. 3
4 records the recorded date and time (year, month, day, hour, minute, second).
Is written with a title.

The scene table has a start block 36 indicating the beginning of audio data or video data, a block size 37 indicating the amount of data, and a pointer 38 indicating the scene table as the next recording position. Attribute 39
Indicates whether or not deletion is possible, 40 indicates the recording date and time (the number of hours, minutes, and seconds), and 41 indicates the title.

FIG. 5 is a diagram showing a disk cartridge having a nonvolatile memory. FIG. 5A is a plan view seen from above, and FIG. 5B is a plan view seen from below. The case upper part 27 has a label area and a shutter window in the upper half of the cartridge for protecting the disk. The lower case 28
The lower half of the cartridge integrated with the upper and lower cases is called a cartridge. The write protector 29 is a nail for preventing erroneous erasure to prevent important recordings and recordings from being accidentally erased.
The shutter lock 30 is for preventing the shutter from opening unnecessarily. The non-volatile memory 14 is for storing the AV management information address as described above.

When the recording mode is set by the operation key signal from a key input terminal (not shown) or the mechanism detection signal input to a mechanical switch terminal (not shown) in the apparatus shown in FIG. 12 is controlled to drive the spindle motor 11 to rotate the disk 1. Further, the control unit controls the seek motor 10 to move the recording magnetic head 2 and the optical pickup 6 to the target recording on the disk 1. On the other hand, recording data such as an audio signal or a video signal is input to an encoder circuit 4 from an A / D converter (not shown).
An encoding process such as (1, 7) is performed. The encoded recording signal is applied to the recording magnetic head 2 via the recording RF amplifier 3, and the recording magnetic head 2
Is applied with a recording magnetic field. At the same time, optical pickup 6
The disk 1 is irradiated with a recording light beam, and data is recorded on the disk 1 by irradiation of the light beam and application of a recording magnetic field.

On the other hand, when the reproduction mode is set, the control circuit 13 similarly rotates the spindle motor 11 and moves the recording magnetic head 2 and the optical pickup 6 to target positions on the disk 1. The optical pickup 6 irradiates the disk 1 with a reproduction light beam, and a sensor (not shown) in the optical pickup 6 detects return light from the disk 1 to read a recording signal. The read reproduction signal is amplified by the reproduction RF amplifier 7, and furthermore, the decoder circuit 8 performs EFM or RLL.
A decoding process such as (1, 7) is performed.

As a result, reproduced data is generated, and further converted into an original analog signal by a D / A converter (not shown) and output. At the time of recording and reproduction, a servo control circuit (not shown) applies focus servo and tracking servo to the light beam from the optical pickup 6.
When information is recorded, data such as an audio signal or a video signal is recorded in the program area 24 of the disk 1, and the AV management area 2 provided in each zone of the disk 1 is recorded.
6, the AV management information is recorded.

Next, in the present embodiment, when the disk is taken out or the power is turned off, the AV management of the zone where the head (the magnetic head 2 and the optical pickup 6) is currently located or the zone closest to the zone where the head is currently located is performed. Area 2
At the same time as writing the AV management information to the disk 6, the head is left at the same position, and the address of the AV management information is recorded in the nonvolatile memory 14 of the cartridge of the disk 1. When the disc 1 is inserted or when the power is turned on, the address of the AV management information in the nonvolatile memory 14 is read, and seek is performed to the area indicated by the address. This eliminates the need to seek to the AV management information area 15 and write the AV management information in the AV management information area as in the related art.

When the disk is inserted or the power is turned on, the address of the AV management information stored in the nonvolatile memory 14 built in the disk 1 is read, and the AV management information of the address of the zone indicated by the nonvolatile memory 14 is read. At this time, the head seeks from the zone located when the disk is taken out or when the power is turned off to the zone indicated by the nonvolatile memory 14. Thus, if the disk has not been replaced, the address of the AV management information indicated by the nonvolatile memory 14 indicates the zone where the head is located or the zone closest to the head, and seeks to the same zone or the adjacent zone. Since only a seek is required, there is no need for a long-distance seek and the time can be reduced.

Next, referring to the flowchart shown in FIG. 6, the operation at the time of power-off and at the time of taking out the disk will be described in detail. In FIG. 6, first, when the power is turned off and when the disc is taken out, the AV management area in the zone where the head is located or the zone closest to the current position of the head is stored in
The V management information is recorded several times continuously. At this time, the head is A
It is set at the position where the V management information is written (S101). Next, the AV management information address of the zone in which the AV management information has been written is written into the nonvolatile memory 14 provided inside the cartridge of the disk 1 (S102). Next, it is determined whether to turn off the power or remove the disk (S103). In response, the power is turned off (S104) or the disc is taken out (S105). Also at this time, the head is located at the zone where the AV management information is recorded.

Next, the operation when the power is turned on and the disc is inserted will be described with reference to the flowchart shown in FIG. First, when the power is turned on, the presence or absence of the disk 1 is checked (S101). When there is a disk or when a disk is inserted, the AV management information address of the nonvolatile memory 14 provided inside the cartridge of the disk is read (S102). Next, the zone where the head is currently located is the AV indicated by the AV management information address of the nonvolatile memory 14.
A comparison is made to see if the zone matches the zone in the management information (S
103). If they match, the disk 1 has not been replaced and seek is performed in the same zone (S104). If they do not match, the disk 1 has been replaced, and seek to another zone at the address indicated by the nonvolatile memory 14 is performed (S105). Next, the AV management information of the zone indicated by the AV management information address of the nonvolatile memory 14 is read (S
106).

At this time, if the first information reading fails, the next AV management information is read and continued until it succeeds.
If the nonvolatile memory 14 cannot be read, each zone may be searched for the latest AV management information.

[0024]

As described above, according to the present invention, A
Since the V management information is written in the AV management area of the zone where the recording head is currently located or the AV management area of the zone closest to the current location of the recording head, the processing time at the time of termination can be reduced. Further, since the address of the AV management information is recorded in the nonvolatile memory, the AV management information can be read based on the address of the nonvolatile memory. At this time, if the recording medium is not replaced, the seek time of the head can be shortened. Therefore, the processing time when a recording medium is inserted or when the power is turned on can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of the present invention.

FIG. 2 is a diagram showing a format of a disk used in the embodiment of FIG. 1;

FIG. 3 is a diagram showing a format of a recordable area in the disc of the embodiment of FIG. 1;

FIG. 4 is a diagram showing a format of AV management information used in the embodiment of FIG. 1;

FIG. 5 is a view showing a disk cartridge of the disk used in the embodiment of FIG. 1;

FIG. 6 is a flowchart showing operations at the time of power-off and at the time of taking out a disk.

FIG. 7 is a flowchart showing an operation when power is turned on and a disc is inserted.

FIG. 8 is a diagram showing a format of a conventional recording disk.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Disc 2 Recording magnetic head 3 Recording RF amplifier 4 Encoder circuit 6 Optical pickup 7 Reproduction RF amplifier 8 Decoder circuit 10 Seek motor 11 Spindle motor 12 Motor control circuit 13 Control circuit 14 Nonvolatile memory 21 Lead-in area 22 Information area 23 Recordable Area 24 Program area 25 Lead-out area 26 AV management area

Claims (5)

[Claims] 1. An information recording apparatus for recording an information signal and AV management information for managing the recorded information signal on an information recording medium, wherein a recording area of the recording medium is divided into a plurality of zones. Is provided with an AV management area for recording the AV management information, and when recording the AV management information on the recording medium, a zone where a recording head for recording information on the recording medium is currently located, or the recording area. An information recording apparatus for recording AV management information in an AV management area of a zone closest to a current position of a head. 2. An information recording apparatus for recording an information signal on an information recording medium and AV management information for managing the recorded information signal, wherein a non-volatile memory is provided in a cartridge of the recording medium, and The recording area is divided into a plurality of zones, and each zone is provided with an AV management area for recording the AV management information,
When removing the recording medium or shutting off the power,
The AV management information is recorded in a zone where a recording head for recording information on the recording medium is currently located, or in an AV management area of a zone closest to the current position of the recording head, and the address of the recorded AV management information is stored in the nonvolatile memory. An information recording device for writing in a memory. 3. The information recording apparatus according to claim 2, wherein when the recording medium is inserted or when the power is turned on, the AV management information of the address written in the nonvolatile memory is read. . 4. The method according to claim 2, wherein when the address of said nonvolatile memory cannot be read, AV management information of all zones is read and the latest one is used as AV management information.
The information recording device according to any one of claims 1 to 4. 5. The information recording apparatus according to claim 2, wherein when the recording medium is removed or power is shut off, the recording head is placed at a position where AV management information is written.