JPH0831148A - Recording medium and data reproducing device - Google Patents

Abstract

PURPOSE:To easily retrieve data files high in frequency of use by recording data on the frequency of retrieval in accordance with the outputting operation of retrieval for each data file and retrieving files with reference to the data at the time of retrieval. CONSTITUTION:The character keys A on the operation section 20 are used to input a file name or its head part, etc., and the retrieval execution key 6 is depressed to execute a retrieval operation. The rotary switch 7 is set on the index position to select the mode which does not specify the number of past retrieval operations. The recording and reproducing device section 60 is controlled to execute the access of data files. The file controller 10 displays the data reproduced by the section 60 on the display section 3. The controller 10 causes the device section 60 to execute recording of a retrieval frequency file FK. If the file FK exists, it can be used for retriaval. The controller 10 controls the device section 60 to read the file FK and access the specified track on which the FK is recorded and reads the DRB of the track to check the address of the FK, which is used to access the FK and reproduce the data file.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording medium and a data reproducing apparatus capable of retrieving and reproducing a data file (main data) from a recording medium.

[0002]

2. Description of the Related Art There has been developed a reproducing apparatus capable of recording various data files on a disc, searching the disc for a desired data file, and outputting the data for display. As a disc, R like a CD-ROM
An OM type is provided, and is known as, for example, English-Japanese dictionary software, kanji dictionary software, or the like.

Also, a recording medium has been developed in which a user can generate and record a data file by using a magneto-optical disk as a recording medium. In this case, an address book, a telephone number list file, and a word are written. It can be used for a user's own purpose such as a book. Further, as a hybrid type, there is also a disc having a read-only area for data files and a recordable area, which can be used as data software in the same manner.

[0004]

By the way, for example, RO
With M-type software and the like, the data files required by the user are different, and one disk contains data files that are repeatedly played and data files that are hardly played. In this case, there is a problem that there are many unnecessary searches in the normal search operation. For example, when a data file is searched by inputting a keyword, one or a plurality of data files corresponding to the keyword are read out, but when a plurality of data files are read, a data file that is usually almost unnecessary Is often included. Therefore, there is a problem that it takes time to output a desired data file and the operation becomes complicated.

To avoid this, the user needs to copy frequently used data files to another recordable disc and use that disc. However, this copy is actually troublesome.

[0006]

SUMMARY OF THE INVENTION In view of such problems, an object of the present invention is to allow a user to easily search for a data file frequently used.

For this reason, it is assumed that the recording medium has a rewritable recording area, and main data and management data for managing the reproduction operation of the main data are recorded in the rewritable recording area. The search output count data for each main data can be recorded.

A recording means is provided as a data reproducing device having a rewritable recording area and corresponding to a recording medium on which main data and management data for reproducing operation management of the main data are recorded. When the main data is retrieved and output from the recording medium, the recording means records the retrieval output frequency data for the retrieved and output main data in the rewritable recording area of the recording medium.

Further, a search control means is further provided. When searching the main data from the recording medium, the search control means refers to the search output count data recorded on the recording medium, and controls the search operation of the main data according to the search output count. It can be so.

Further, the recording means records the address data indicating the recording position of the corresponding main data together with the search output frequency data.

[0011]

[Function] For each data file, the search count data is recorded according to the search output operation, and at the time of search, the search count data is referred to so that the data can be searched, so that, for example, only the data files frequently output by the user are stored. It can be said that the search output is performed, and the search efficiency can be improved.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows an example of the appearance of a data reproducing device and a recording medium of an embodiment. Reference numeral 1 is a data reproducing apparatus, and this data reproducing apparatus 1 uses a disk 90 as a recording medium. The disk 90 is a disk having a magneto-optical recording area and a diameter of 64 mm, and as shown in the drawing, a cartridge 97 which forms an outer casing is formed and is rotatably accommodated inside. The shutter 98 is opened when it is stored in the data reproducing apparatus 1, and the disc 90 is exposed to enable the recording / reproducing operation. In the data reproducing device 1, 2 is a disc insertion portion. The cartridge 97 is inserted / removed from the disc insertion portion.

Reference numeral 3 denotes a display unit formed of an LCD panel or the like, which displays various operation requests and operation states, and displays and outputs reproduction data. Reference numeral 4 is a key (hereinafter referred to as a character key) for inputting characters and numbers.
A feed key 5 is used for page feed / page return of output data on the display unit 3.

Reference numeral 6 denotes a search execution key. For example, if the search execution key 6 is pressed after inputting a file name or a keyword which is a part of the file name with a character key, the data reproducing device 1 searches for the file data. , Display 3
Will be output to. Reference numeral 7 denotes a rotary switch used in a search operation based on the number of past searches, which is a feature of the present embodiment. For example, the number of times of search is 1 and the number of times of search is 1, 2 and 3, respectively. It is possible to specify that the number of searches is 2 and the number of searches is 3 or more. If it is set to the position of "*", it means that there is no designation. A delete count key 8 is used to delete a search count file, which will be described later, for the designated data file.

FIG. 2 shows an internal block diagram of the data reproducing apparatus 1. Reference numeral 10 is a file controller, and 20 is an operation unit, which corresponds to the keys and switches 4 to 7 described above. Reference numeral 60 denotes a recording / reproducing device section for actually performing reproduction / recording operations on the disc 90.

The file controller 10 is formed by a microcomputer, 11 is a CPU, 12
Is a program ROM, and 13 is a work RAM. The file controller 10 controls the recording / reproducing device section 60 to search, reproduce, and record file data from the disk 90, and controls the display output on the display section 3. Then, these controls are performed in response to operation information input from the operation unit 20.
That is, the processing program to be executed for the operation information input is stored in the program ROM 12, and the CPU 11 performs various calculations using the work RAM 13 according to the program, and the recording / reproducing device section 60 and the display section 3 are executed.
Control signals and data files are transmitted and received.

The recording / reproducing device section 60 is constructed as shown in FIG. As shown in FIG. 3, the disk 90 is rotationally driven by the spindle motor 62. Reference numeral 63 denotes an optical head for irradiating the disk 90 with a laser beam at the time of recording / reproducing, which provides a high level laser output for heating the recording track to the Curie temperature at the time of recording, and a reflected light by the magnetic Kerr effect at the time of reproducing. Provides a relatively low level laser power for detecting data from the.

Therefore, the optical head 63 is equipped with a laser diode as a laser output means, an optical system including a deflecting beam splitter, an objective lens and the like, and a detector for detecting reflected light. The objective lens 63a is held by a biaxial mechanism 64 so as to be displaceable in the disk radial direction and in the direction in which it comes in contact with and separates from the disk.

Reference numeral 66 denotes a magnetic head for applying a magnetic field modulated by the supplied data to the magneto-optical disk, and is arranged at a position facing the optical head 63 with the disk 90 in between. The entire optical head 63 and the magnetic head 66 are movable in the disk radial direction by a sled mechanism 65.

The information detected from the disk 90 by the optical head 63 by the reproducing operation is supplied to the RF amplifier 67. The RF amplifier 67 calculates a reproduction RF signal, a tracking error signal, a focus error signal, absolute position information (absolute position information recorded as pregroove (wobbling groove) on the disc 90), address information by arithmetic processing of the supplied information. , A focus monitor signal, etc. are extracted. Then, the extracted reproduction RF signal is supplied to the encoder / decoder unit 68. The tracking error signal and the focus error signal are supplied to the servo circuit 69, and the address information is supplied to the address decoder 70.
Is supplied to. Further, the absolute position information and the focus monitor signal are supplied to the system controller 61 configured by, for example, a microcomputer.

The servo circuit 69 supplies the supplied tracking error signal, focus error signal, track jump command, seek command from the system controller 61,
Various servo drive signals are generated according to the rotation speed detection information of the spindle motor 62, and the biaxial mechanism 64 and the sled mechanism 65 are controlled to perform focus and tracking control.
V) or constant linear velocity (CLV).

The reproduced RF signal is sent to the encoder / decoder section 6
After EFM demodulation and decoding such as CIRC in 8,
Buffer RAM 7 once by the memory controller 72
Written to 1. Then, the signal read from the buffer RAM 71 at a predetermined timing under the control of the memory controller 72 is supplied to the register controller 10 as reproduction data.

When the recording operation is performed on the disk 90, the data supplied from the register controller 10 is temporarily buffered by the memory controller 72.
Written to AM71. Then, it is read at a predetermined timing and sent to the encoder / decoder unit 68. Then, the encoder / decoder unit 68 performs CIRC encoding,
It is supplied to the magnetic head drive circuit 73 after being subjected to encoding processing such as EFM modulation.

The magnetic head drive circuit 73 supplies a magnetic head drive signal to the magnetic head 66 according to the encoded recording data. That is, an N or S magnetic field is applied to the disk 90 by the magnetic head 66. Further, at this time, the system controller 61 supplies a control signal to the optical head so as to output a laser beam of a recording level.

The disc 90 used in the recording / reproducing apparatus section 60 in this embodiment is a hybrid disc or a recording / reproducing disc. That is, a disk having at least an area where data can be recorded by the magnetic head 66 is used.

FIG. 4 shows the structures of the hybrid disc and the recording / reproducing disc. The disc 90, which is a hybrid disc, has an information recording area 91 as shown in FIG.
2. A read-only area 93, a U-TOC area 94, a recording / playback area 95, and a lead-out area 96 are provided. Data is recorded as pits in the lead-in area 92 and the reproduction-only area 93, while the U-TOC area 94, the recording / reproducing area 95, and the lead-out area 96 are used as magneto-optical areas to record data magnetically.

So-called P-TOC information is recorded as management information in the lead-in area 92, and a data file as reproduction-only data is recorded in the reproduction-only area 93. The recording / reproducing area 95 is an area in which a user can write a data file, and the recording data track in the recording / reproducing area 95 is managed by the U-TOC data recorded in the U-TOC area 94.

On the other hand, a disk 9 which is a recording / reproducing disk
Reference numeral 0 indicates an information recording area 91 as shown in FIG. 4B, which is a lead-in area 92, U-T from the inner peripheral side near the rotation center O.
OC area 94, recording / reproducing area 95, lead-out area 9
6 is provided. That is, only the lead-in area 92 is used as a pit area, and P-TOC information is recorded in this area. The recording / reproducing area 95 is an area in which a user can write a data file, and the management of recording data tracks in this recording / reproducing area 95 is performed by the U-TO.
This is performed by the U-TOC data recorded in the C area 94.

Either of such a hybrid disc or a recording / reproducing disc may be used, but these discs 90 are in a so-called data recording format.

When performing a recording / reproducing operation on such a disc 90, the recording / reproducing device section 60 firstly records the P-TOC recorded on the disc 90 as management information.
(Pre-mastered TOC), U-TOC (User TO
Read C). Then, the system controller 61 determines the address of the track to be recorded / reproduced on the disc 90 according to the management information. The read management information is held in the buffer RAM 71. For this reason, in the buffer RAM 71, the above-mentioned recording data / playback data buffer area and the area for holding these management information are set separately.

Here, the P-TOC sector will be described first with reference to FIG. 6 as the management information for mainly managing the tracks in the reproduction-only area of the disc 90. FIG. 6 shows one P-TOC sector (sector 0). It should be noted that the description of the P-TOC format sector 1 and subsequent sectors will be omitted.

In the data area of the P-TOC sector (4 bytes x 588, 2352 bytes), a sync pattern consisting of 1 byte data of all 0s or all 1s and a cluster address and an address indicating a sector address are 4 at the head position. Bytes are added, and the above is used as a header P
-It is shown to be in the area of TOC.

Further, an identification ID by an ASCII code corresponding to the character "MINX" is added at a predetermined address position following the header. In addition, the disc type, recording level, song number of the first song recorded (First TNO), song number of the last song (Last TNO), lead-out start address RO _A , sector usage status (Us
ed sectors), Power Cal Area Start Address P
C _A, the recording power, the start address of the U-TOC US
T _A , a start address RST _A of a recordable area (recordable user area), and the like are recorded.

Then, a correspondence table instruction data section having table pointers (P-TNO1 to P-TNO255) for making each recorded music piece correspond to a parts table in a management table section described later is prepared.

Then, in the area following the correspondence table instruction data portion, corresponding to the table pointers (P-TNO1 to P-TNO255) in the correspondence table instruction data portion, (01h) to (FF).
A management table section provided with up to 255 parts tables up to (h) is prepared (herein, "h"
Numerical values with are so-called hexadecimal notation). In each part table, the start address, the end address, and
And mode information (track mode) of the parts (tracks) can be recorded. A part is a track portion in which temporally continuous data is physically and continuously recorded, and one track can be physically divided and recorded as a plurality of parts.
However, the number of tracks recorded in the reproduction-only area 93 is usually 1.
It consists of two parts.

The mode information of the track in each parts table is the information as to whether a data file or audio data is recorded for that part, and whether or not it is set to overwrite inhibition or data copy inhibition. Information such as is recorded.

In each part table from (01h) to (FFh) in the management table section, the contents of the part are indicated by the table pointers (P-TNO1 to P-TNO255) in the corresponding table instruction data section. That is, for the first track, there is a certain parts table as the table pointer P-TNO1 (for example (01h). However, in practice, the table pointer has a certain parts table at the byte position in the P-TOC sector 0 by the predetermined arithmetic processing. Is recorded.) In this case, the start address of the parts table (01h) is the start address of the recording position of the first track, and similarly, the end address is recorded on the first track. It becomes the end address of the specified position. Further, the track mode information becomes information about the first track.

Similarly, for the second track, the parts table indicated by the table pointer P-TNO2 (for example, (02h)
), The start address, end address, and track mode information of the recording position of the second track are recorded.

Similarly, since the table pointers up to P-TNO255 are prepared, it is possible to manage up to track 255 on the P-TOC. And in this way P
By forming the -TOC sector 0, a predetermined track can be accessed and reproduced at the time of reproduction, for example.

In the case of the recording / reproducing disc shown in FIG. 4 (b), since there is no so-called reproduction-only track, the above-mentioned correspondence table instruction data section and management table section are not used (these will be explained subsequently. U-TOC
Therefore, each byte is all “00h”.

Next, the U-TOC will be described. FIG. 7 shows a format of one sector (sector 0) of the U-TOC, which is mainly a data area in which management information about tracks recorded by the user and unrecorded areas (free areas) is recorded. It For example disk 9
When a certain data track is newly recorded at 0, the system controller 61 searches the U-TOC for a free area on the disc. Also, when reproducing the track in the recording / reproducing area 95, the address is obtained by referring to the U-TOC. Note that the U-TOC is also an option in sector 1 and later, but description thereof will be omitted.

As in the P-TOC, the U-TOC sector (sector 0) shown in FIG. 7 is provided with a header first, and then, at a predetermined address position, a manufacturer code, a model code, and a music number of the first music piece. (First TNO), song number (Last TNO) of the last song, sector usage, disc serial number, disc ID, and other data are recorded. Various table pointers (P-DFA, P-EMPTY, P-
An area for recording FRA, P-TNO1 to P-TNO255) is prepared.

Then, 255 parts tables (01h) to (FFh) are provided as management table parts to be associated with the table pointers (P-DFA to P-TNO255) of the corresponding table instruction data part. 6, the start address as the starting point, the end address as the ending point, and the mode information (track mode) of the part are recorded as in the P-TOC sector 0 of FIG. Further, in the case of this U-TOC sector 0, the parts shown in each parts table may be connected to other parts in succession, so the start and end addresses of the connected parts are recorded in the parts table. The link information indicating is recorded.

That is, when one track is divided into a plurality of parts and recorded, the parts table corresponding to each part is linked by the link information. In other words, in the link information, the number of each parts table (in practice, a numerical value which is a byte position in the U-TOC sector 0 by a predetermined arithmetic process) indicating the parts to be continued is recorded. If there is no part to be continued, the link information is "00h".

Each of the parts tables (01h) to (FFh) in the management table section of the U-TOC sector 0 has a table pointer (P-DF) in the corresponding table instruction data section.
A, P-EMPTY, P-FRA, P-TNO1 to P-TNO255)
The contents of the part are shown as follows.

The table pointer P-DFA is shown for a defective area on the disk 90. One part table or a head of a plurality of parts tables in which a portion (part) that becomes a defective area due to a scratch or the like is shown. The parts table is specified. In other words, when there is a defective part, one of (01h) to (FFh) is recorded in the table pointer P-DFA, and the defective part is indicated by the start and end addresses in the corresponding parts table. . If another defective part exists, another part table is designated as the link information in the part table, and the defective part is also shown in the part table. And if there is no other defective part, the link information is, for example, "(00h)",
After that, it is said that there is no link.

The table pointer P-EMPTY indicates the top part table of one or a plurality of unused part tables in the management table section. If an unused part table exists, the table pointer P-EMPTY is used as a table pointer P-EMPTY. , (01h) to (FFh) is recorded.
If there are multiple unused part tables, the part tables specified by the table pointer P-EMPTY are used to sequentially specify the part tables by link information, and all the unused part tables are linked on the management table section. To be done.

The table pointer P-FRA indicates a writable free area (including an erased area) on the magneto-optical disk 90, and 1 or the track portion (= part) which is the free area is indicated. The first part table in multiple part tables is specified. In other words, if there is a free area, the table pointer P-
Any one of (01h) to (FFh) is recorded in the FRA, and the parts table corresponding to that records the free area parts by the start and end addresses. When there are a plurality of such parts, that is, when there are a plurality of parts tables, the link information sequentially specifies the parts table having the link information of "(00h)".

FIG. 8 schematically shows the management state of the parts which are the free areas by the parts table. This is when the parts (03h) (18h) (1Fh) (2Bh) (E3h) are set as the free area, this state continues to the table pointer P-FRA and the parts table (03h) (18h) (1Fh) (2Bh ) (E3h) shows the state represented by the link. The defective area and the unused parts table management mode described above are the same.

By the way, in the case of a magneto-optical disk in which audio data such as music is not recorded and there is no defect,
Parts table (01h) by table pointer P-FRA
Is designated, which indicates that the entire recordable user area of the disc is an unrecorded area (free area). And it remains in this case (02h) ~ (FFh)
Since the parts table of will not be used,
The part table (02h) is specified by the above-mentioned table pointer P-EMPTY, the part table (03h) is specified as the link information of the part table (02h), and the part table is specified as the link information of the part table (03h).
(04h) is specified, and so on.Parts table (FFh)
Are linked up to. In this case, the link information of the parts table (FFh) is set to "(00h)" indicating that there is no connection thereafter. At this time, in the parts table (01h), the start address of the recordable user area is recorded as the start address, and the address immediately before the lead-out start address is recorded as the end address.

The table pointers P-TNO1 to P-TNO255 indicate the tracks recorded by the user on the disc 90. For example, in the table pointer P-TNO1, the first track in the recording / reproducing area 95 (reproduction-only area 93).
(Nth track when n tracks are recorded)
The part table in which the temporally leading part of the one or a plurality of parts in which the data is recorded is indicated is specified. For example, when the first track is recorded on the disc without dividing the track (that is, by one part), the recording area of the first track is the start and end in the parts table indicated by the table pointer P-TNO1. It is recorded as an address.

For example, the second track ((n + 2) th track)
When a track) is discretely recorded on a disc in a plurality of parts, each part is designated in a temporal order to indicate the recording position of the music. In other words, from the parts table specified by the table pointer P-TNO2,
In addition, the link information specifies other parts tables sequentially in chronological order, and the link information is "(00h)
The parts table will be connected (see above, FIG. 7).
Similar form to).

As described above, the area management on the disc and the track management of the reproduction-only area 93 are performed by the P-TOC, and the track management and the free area management of the recording / reproduction area 95 are performed by the U-TOC.

FIG. 5 shows the track format of the disc 90. Note that FIG. 5 shows a hybrid disc as an example. Data files are recorded in the reproduction-only area 93 or the recording / reproduction area 95 on the disc 90 as described above. These data files are recorded in the P-
It is managed as a track roughly by TOC and U-TOC. Although not described in detail, not only all tracks should be data tracks in which data files are recorded, but also audio tracks and video tracks for recording audio data and video data should be mixed in one disc. Is also possible.

The structure of a track which is a data track in the reproduction-only area 93 or the recording / reproduction area 95 is shown in FIG.
It becomes like (b). The first cluster of the track (cluster N) is used as the boot area. It should be noted that one cluster is composed of 36 sectors and 32 of the 36 sectors are used as main data sectors. The remaining sectors are used as sub data sectors and linking sectors. One sector consists of 2352 bytes, of which 2048 bytes are used for actual data recording. The other bytes are used for synchronization data, headers, addresses, error correction codes, etc.

Following the boot area, 16 clusters are used as a volume management area. Then, a file extents area is provided after that. File Aix The Ceiling area is recorded actual data files F _1, F ₂ ···· as in FIG. 5 (c), the various data are recorded for managing the data files on the volume management area .

The volume management area is shown in FIG.
As shown in (c), a volume descriptor VD, a volume space bitmap VSB, a management table MT, a directory record block DRB, and an extent record block ERB are provided. These are called management blocks, and one management block is composed of 2048 bytes. That is, 512 management blocks can be recorded in the volume management area of 16 clusters.

It is specified that a volume descriptor VD, a volume space bitmap VSB, and a management table MT are provided as the first management block, while the directory record block DRB and the extent record block ERB are the data file structure of the track. It can be set according to.

The actual data files F ₁ , F ₂ ... In the file extents area have file names and addresses recorded by the directory record block DRB.
By referring to B, the data file F _x can be searched and reproduced.

In such a disc 90, various data files are recorded as tracks in the reproduction-only area 93. And the user is the data reproduction device 1
It is possible to search for a desired data file by using and display it on the display unit 3.

The operation characteristic of this embodiment will be described below. As shown in FIG. 10, for example, data files F ₁ , F ₂ ... Are recorded on the tracks of the reproduction-only area 93 managed by the P-TOC on the disc 90, and these are directories in the same track. It is managed by the record block DRB.

Further, in the present embodiment, in the recording / reproducing area 95, the file name is searched for by the directory record block DRB in a certain track.
It is possible to form a directory of data files for K and record the search count file FK in the file extents area of the track. This search count file FK records the file name and the search count of the data files F ₁ and F ₂ ... I have to. For example, in the past, data file F ₁ was twice, data file F ₃
, And the data file F _n is searched three times, the data as the search count file FK is displayed as “F” in order to indicate the search count corresponding to each file name.
₁ -2 "becomes" F ₂ -1 "," F _n -3 '.

FIG. 9 shows the processing of the file controller 10 at the time of searching in this embodiment. The user has, for example, the letter key 4
Input the file name or the beginning of the file name, and press the search execution key 6 to execute the search operation.
At the time of normal search, the user turns the rotary switch 7 to "*".
Set to the position. This means a mode in which the number of past searches is not specified. In this case, the process proceeds in steps F101 → F102 → F109.

Then, the recording / reproducing device section 60 is controlled to access the data file. That is, the directory record block DRB is read in the data track and the address of the corresponding data file is confirmed. Then, the address is accessed to reproduce the data file.

The file controller 10 takes in the data file reproduced by the recording / reproducing device section 60 and displays it on the display section 3 (F110). Although the normal search is completed as described above, the file controller 10 causes the recording / reproducing device section 60 to record the search count file FK as the process of step F111.

That is, as a part of the data of the search count file FK, the file name of the data file just reproduced and the search count are recorded. If it is the data file reproduced for the first time this time, the file name is newly recorded, and the number of searches is set to 1 corresponding to it. If the data file has been reproduced so far and the same file name exists in the search count file FK, the value of the search count is rewritten to a value obtained by adding 1. By doing so, the above-described search frequency file FK is automatically created along with the search operation.

When the search count file FK exists, that is, after the user has used the disc 90 several times, the search using the search count file FK can be performed. That is, the user sets the rotary switch 7 to any of "1" to "3" when pressing the search execution key 6. For example, if you want to play the data file that you searched only once in the past, set the rotary switch 7 to "1", and if you want to search again the data file that you have searched many times, set the rotary switch 7 to "1". 3 ”.

As a search operation, after setting the rotary switch 7, the search execution key 6 may be directly pressed. in this case,
The process proceeds from step F101 → F102 → F103. It is also possible to input a part of the file name with the character keys 3 and then press the search execution key 6.

Then, the file controller 10 controls the recording / reproducing device section 60 to read the search count file FK. That is, the U-TOC area is confirmed from the P-TOC, the U-TOC is read, and a predetermined track on which the search frequency file FK is recorded is accessed.
Then, the directory record block DRB in that track is read to confirm the address of the search count file FK. Then, based on the address, the search count file FK is accessed and reproduced.

When the file controller 10 fetches the data of the search count file FK, it searches the search count file FK.
In K, it is determined whether or not there is a data file having a file name corresponding to the number of searches. That is, when the rotary switch 7 is "1", the file name for which the search count value is "1" is searched for, and the rotary switch 7 is "3".
In the case of, a file name whose search count value is "3" or more is searched for.

If there is no corresponding search count value in the search count file FK, the display section 3 displays, for example, "no corresponding file" and terminates the processing.
(F108).

If a file name corresponding to the search count value exists, the file name is taken out and set as a data file to be accessed (F105).
Then, the recording / reproducing device section 60 is controlled to reproduce the data file having the file name. That is, the corresponding data file is searched for from the directory record block DRB, and the address described therein is accessed to reproduce the data file. Then, the reproduction data is fetched and displayed on the display unit 3 (F106).

When there are a plurality of corresponding data files, the user operates the feed key 5 and
The other corresponding data files are played and displayed in the same manner (F107 → F106). By performing the processing in this manner, the user can very easily reproduce the data file that is frequently searched, for example. That is, when it is desired to display and output the data file that has been output and displayed many times in the past, it is sufficient to set the rotation switch 7 to "3" and press the search execution key 6.

If there are a plurality of relevant data files in step F104, the file names may be displayed as a list in the display unit 3 in a menu format so that the user can select the data file to be reproduced. . In addition, when a search is performed using the search count file FK, this process does not count the search count, but this counts, that is, the search count file FK.
May be updated.

By the way, when the delete key 8 is pressed while a certain data file is displayed and output, the data relating to that data file in the search count file FK is deleted. In other words, for data files that are no longer needed in the future, the user can delete the data from the search count file FK,
The extra search operation is eliminated, which is suitable for speeding up the search.

Next, the second to fourth embodiments will be described. FIG. 11 shows the second embodiment. In this case, as the search count file FK, in addition to the file name of each data file and the search count, the address where the data file is actually recorded is also recorded. I try to keep it. By doing so, when the search is executed by designating the number of times of search in the past, the file controller 10
By accessing the search count file FK, it is not necessary to search the directory record block DRB of the actual data file.

That is, a data file having the corresponding search count is searched from the search count file FK, and if the corresponding data file exists, the position of the data file is directly read from the address recorded corresponding to it as shown in FIG. Can be discriminated and reproduced. By doing so, the search operation can be further speeded up.

When the address is recorded in the search frequency file FK, the file name may not be recorded. This is because if the corresponding number of searches exists, the address can be referred to and the reproduction can be performed directly. However, considering the case where a keyword is input and a search is performed using both the search count and the keyword (a part of the file name) in the search count file FK, it is better to record the file name as well.

FIG. 12 shows the third embodiment.
In this case, in addition to the operation of generating the search count file FK during normal search, the data is further recorded in the file extents area of the track in the recording / reproducing area 95. That is, a certain data file in the reproduction-only area 93 is copied to the recording / reproduction area.

For example, assume that the data file F ₂ is reproduced by a normal search operation. At this time, the above steps
File name search number for data file F ₂ in the processing of F111 file FK, but will record the number of searches, wherein for example, elsewhere in the file extent area in search count file FK same track and Copy the data file F ₂ . The data in the search count file FK is the data file F copied corresponding to the file name and the search count.
_The address indicating the recording position of ₂ is recorded.

By doing so, when performing a search using the search count file FK, the recording / reproducing area 95 is used.
The data files that have been copied will be reproduced, that is, the data files that are frequently used can be concentrated and recorded. Therefore, even when there are a plurality of data files corresponding to the number of searches and the data files are sequentially played back, the access distance is short and a faster search can be performed.

In the above embodiment, the case where the disc 90 is a hybrid disc has been described, but FIG.
The same operation can be performed with a recording / reproducing disc such as. FIG. 13 shows the case where the same system as that of the first embodiment is adopted in the recording / reproducing disk as the fourth embodiment, that is, all the tracks are changed to a form managed by U-TOC. Only. The search operation is executed in the same manner as in the first embodiment. Of course, the methods of the second and third embodiments can be applied to the recording / reproducing disk.

Although the embodiments have been described above, there are various types of methods such as the data type in the data file, the directory structure for the data file, the recording / reproducing processing timing, and the recording / reproducing data unit. It goes without saying that the present invention can be modified and applied. As a matter of course, the recording medium is not limited to the mini disk format, but another magneto-optical disk or a magnetic disk such as a floppy disk may be used.

Further, the rotary switch 7 can be set to each mode of "1 time", "2 times", "3 times or more" as the number of times of retrieval in the past, but it is not limited to this. For example, "3 times or more" may be set, or "1 time", "5 times", "10 times or more", or "1 time or more""5 times or more" can be set. Good. Of course, the operating means does not have to be a rotary switch type.

If, for example, "one or more times" can be set, it is not necessary to record the data of the number of times of retrieval in the number-of-retrievals file FK. For example, only the file name or address should be recorded. Just do it. That is, when only the file name is recorded, the file name exists in the search frequency file FK, and the data indicates that the data file has been searched once or more.

Further, various search methods using the search count file FK can be considered in addition to the processing shown in FIG. The specific search processing procedure may be set according to the design circumstances such as the type and number of data files and the performance of the file controller.

[0087]

As described above, according to the present invention, it is possible to record search output frequency data for each main data in a rewritable recording area as a recording medium. When the search output is executed, a recording unit for recording the search output count data for the main data searched and output is provided in the rewritable recording area of the recording medium. Further, when searching the main data from the recording medium, the search control means refers to the search output count data recorded in the recording medium, and controls the search operation of the main data according to the search output count. To be able to
In other words, for each data file, the search count data is recorded according to the search output operation, and at the time of search, it is possible to search by referring to this search count data so that, for example, only the data file that the user often outputs is searched. It can be output, and there is an effect that a desired data file can be output at high speed by a simple search operation.

Further, since it is possible to manage the data files that are frequently used by using the number-of-searches data, it is possible to perform the editing process only with those data.

By recording the address data indicating the recording position of the corresponding main data together with the search output frequency data, the search operation can be made efficient and the search speed can be increased.

[Brief description of drawings]

FIG. 1 is an external view of a data reproducing device and a disc according to an embodiment of the present invention.

FIG. 2 is a block diagram of a data reproducing device according to an embodiment.

FIG. 3 is a block diagram of a recording / reproducing device section in the data reproducing device of the embodiment.

FIG. 4 is an explanatory diagram of a structure of a disc according to an embodiment.

FIG. 5 is an explanatory diagram of a track format of the disc of the embodiment.

FIG. 6 is an explanatory diagram of P-TOC in the disc of the example.

FIG. 7 is an explanatory diagram of U-TOC in the disc of the example.

FIG. 8 is an explanatory diagram of a U-TOC link form of the disc of the embodiment.

FIG. 9 is a flowchart of a search process by the data reproducing device according to the embodiment.

FIG. 10 is a conceptual explanatory diagram of a search method according to the first embodiment.

FIG. 11 is a conceptual explanatory diagram of a search method of the second embodiment.

FIG. 12 is a conceptual explanatory diagram of a search method of a third embodiment.

FIG. 13 is a conceptual explanatory diagram of a search method according to a fourth embodiment.

[Explanation of symbols]

 1 data reproducing device 3 display unit 4 character key 5 feed key 6 search execution key 7 rotation switch 10 file controller 11 CPU 12 program ROM 13 work RAM 20 operation unit 60 recording / reproducing device unit 61 system controller 90 disk 92 lead-in area 93 reproduction Dedicated area 94 U-TOC area 95 Recording / reproduction area 96 Lead-out area

Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI Technical display location G11B 27/10 A 9369-5D

Claims (4)

[Claims] 1. Having a rewritable recording area,
A recording medium in which main data and management data for reproducing operation management of the main data are recorded, wherein search output count data for each main data can be recorded in the rewritable recording area. A recording medium characterized by being present. 2. Having a rewritable recording area,
As a data reproducing device corresponding to the recording medium on which the main data and the management data for managing the reproduction operation of the main data are recorded, when the search output of the main data is executed from the recording medium, rewriting on the recording medium is possible. A data reproducing apparatus comprising recording means for recording search output frequency data for main data retrieved and output in a different recording area. 3. When retrieving main data from a recording medium,
3. The search control means capable of controlling the search operation of the main data according to the number of search outputs, by referring to the number of search output records recorded on the recording medium. The described data reproducing device. 4. The recording device according to claim 2, wherein the recording device is configured to record address data indicating a recording position of the corresponding main data together with the search output count data. Data playback device.