JPH0863897A - Recording apparatus and reproducing apparatus - Google Patents

Abstract

PURPOSE: To realize more diverse applications by a method wherein, when main data is recorded, information about the main data is recorded as subcode data on a recording medium. CONSTITUTION: A system controller 11 supplies subcode data to an encoder/ decoder part 8 so as to correspond to the EFM encoding operation of main data, and it is recorded inside a main data frame in a disk 1. Even in a magnetooptical region on the disk 1, a Q-channel is used, and various kinds of operations are realized. Then, when a subcode is defined in the magnetooptical region, recording and time stamping by an external timer and character recording in large quantities can be realized as a recording and reproducing apparatus for a minidisk system.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording apparatus capable of recording data such as music on a disk-shaped recording medium, and a reproducing apparatus capable of reproducing data such as music.

[0002]

2. Description of the Related Art A data-rewritable magneto-optical disk that allows a user to record music data and the like is known, and is widely used, for example, as a mini disk system. In the mini disc system, management information (P-TOC, U-TO) is stored in a predetermined area (inner circumference side) on the disc.
Area for recording C) is prepared. Of these, U-
The TOC is updated according to the recording of data.
In this U-TOC, the start address and end address of each recorded track, the address of an unrecorded area (free area) in which no data has been recorded, and the like are written.

Then, the recording device grasps the position of the free area on the disk from the U-TOC and records new data there. When data is recorded, the U-TOC is updated so that the start position and end position of the recording operation become the start address and end address of a new track after the end of recording. By this update, the recording operation is reflected on the U-TOC, and the recording of a new track is completed. The playback device is U-
By grasping the position of the track recorded from the TOC,
You will access it and play it back. Also, UT
As the OC, a sector for recording character information corresponding to a track and recording a recording date and time is also provided.

[0004]

By the way, in the format of the management information of such a mini disk system,
When considering various applications, there is a problem that it may not be able to handle them. Various examples are given below.

[0005] There is a device called an audio timer which is widely used. This is to supply power to a device such as a recording device connected at that time by a user setting a timer. At this time, for example, so-called timer recording can be performed by setting a timer mode in which the recording operation is started when power is supplied on the recording device side. Here, consider that an audio timer is connected to the mini disk recorder to perform timer recording. Even a mini-disc recorder can automatically start recording when power is supplied from the audio timer, and can record audio from, for example, a radio tuner onto a disc.

However, the power supply from the audio timer is cut off at the end time set by the user. Since the mini disk recorder does not know the end time, recording continues until this time, but no operation is possible when the power supply is stopped. Here, in the mini disk system, if the U-TOC is not updated according to the recording operation after the recording is completed, the recording operation cannot be realized. That is,
If the power supply is suddenly cut off, the U-TOC cannot be rewritten on the disc, and the recorded contents up to that point become invalid. For this reason, the operation of linking with the audio timer cannot be performed properly.
Further, not only the timer recording, but also when the power supply is stopped during recording due to a power failure or disconnection of the outlet, the recorded contents up to that point are similarly invalidated.

In order to cope with such timer recording by an audio timer and sudden power supply stop, a mini disk recorder is provided with, for example, a non-volatile memory, and during recording, the U-T is stored in the non-volatile memory.
OC must be updated sequentially. In this way, after the power supply is restored, the U-TOC data, that is, the U-TOC data held in the non-volatile memory can be written to the disk according to the recorded contents up to that point, and the recorded contents are valid. However, this inevitably causes an increase in circuit scale and cost.

Further, there is a limit in inputting character information. Character information can be recorded in the U-TOC of the mini disk system in correspondence with tracks, but the number of characters that can be recorded is limited by the U-TOC sector format. For example, it is impossible to record lyrics for recorded music because the number of characters is too large. Similarly, recording various memos corresponding to tracks has a limit in the number of characters.

Further, the recording time can be recorded in the U-TOC, but this time information is only the time when recording is started for the track. Therefore, it is impossible to record the exact recording time and the like in each part of the track, that is, it is impossible to display it at the time of reproduction.
Further, for example, if tracks are divided or connected after recording, accurate time information about each track cannot be obtained.

[0010]

The present invention has been made in view of the above problems, and has an area in which management information about main data to be recorded such as a mini disk system is recorded, and the management information is An object of the present invention is to make it possible to realize more various applications as a recording device and a reproducing device corresponding to a recording medium that is updated after the recording operation is completed according to the recording operation.

For this reason, the recording device is constructed so that, when the main data is recorded, information about the main data can be recorded as subcode data on the recording medium.

As the sub-code data, information related to the information to be expressed on the management information for the recorded main data is recorded.

When main data and subcode data are recorded in an unrecorded area on a recording medium, after the recording operation, information related to the information to be expressed on the management information about the recorded main data, By using the subcode data, the area in which the main data is recorded is managed from the unrecorded area to the recorded area.
Configure so that management information can be updated.

Further, when recording the main data and the subcode data in an area managed as an unrecorded area on the recording medium, identification data indicating that the recording is executed in the unrecorded area in the management information. The information is recorded, and the management information updating operation using the subcode data is executed at a predetermined time point in accordance with the identification data.

Further, the recording device records, as the subcode data, information which is not related to the information to be expressed on the management information for the recorded main data.

The reproducing apparatus is constructed so that the subcode data can be decoded and the contents of the subcode data can be output when the main data is reproduced.

[0017]

In the disc recording / reproducing system such as the mini disc system, the area for recording the subcode together with the main data is prepared. For example, in a CD system, TOC and time information are recorded using subcodes. However, like a mini disk system, an area for recording management information about main data to be recorded is provided separately from the sub-code, and the management information is updated according to the recording operation after the recording operation is completed. The subcode is not effectively used in the medium.

In the case of the mini disk system, the subcode is defined only in the portion where the data is recorded in the pit form, and in this case, the address information is simply recorded as the subcode data. In the magneto-optical area where data can be recorded and reproduced, since the address is obtained from the pre-groove on the disc, the subcode is not defined at all, and all-zero data is recorded in that area. Alternatively, it is said that the address information obtained from the pre-groove is simply copied as in the CD-MO system. By effectively using this subcode, information that U-TOC cannot support can be recorded, and various various applications can be realized.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A recording / reproducing apparatus as an embodiment of the recording apparatus / reproducing apparatus of the present invention will be described below with reference to FIGS.
This embodiment is a recording / reproducing apparatus using a magneto-optical disk (mini disk) as a recording medium. The description will be given in the following order. 1. Configuration of recording / reproducing apparatus 2. P-TOC sector 3. U-TOC sector 4. Subcode 5. Example of operation realized by subcode recording

1. Configuration of Recording / Reproducing Apparatus FIG. 1 shows a block diagram of a main part of the recording / reproducing apparatus.
In FIG. 1, reference numeral 1 denotes a magneto-optical disk on which audio data is recorded, for example, which is rotationally driven by a spindle motor 2. An optical head 3 irradiates the magneto-optical disk 1 with a laser beam during recording / reproduction, which provides a high level laser output for heating the recording track to the Curie temperature during recording, and the magnetic Kerr effect during reproduction. It provides a relatively low level laser power for detecting data from reflected light.

Therefore, the optical head 3 is equipped with a laser diode as a laser output means, an optical system including a deflecting beam splitter and an objective lens, and a detector for detecting reflected light. The objective lens 3a is held by the biaxial mechanism 4 so as to be displaceable in the disc radial direction and the direction in which the disc moves toward and away from the disc.

Reference numeral 6a denotes a magnetic head for applying a magnetic field modulated by the supplied data to the magneto-optical disk 1, which is arranged at a position facing the optical head 3 with the magneto-optical disk 1 interposed therebetween. The entire optical head 3 and the magnetic head 6a are movable in the disk radial direction by the sled mechanism 5.

By the reproducing operation, the information detected from the magneto-optical disk 1 by the optical head 3 is supplied to the RF amplifier 7. The RF amplifier 7 calculates the supplied information by reproducing RF signals, tracking error signals, focus error signals, and absolute position information (absolute position information recorded as pregrooves (wobbling grooves) on the magneto-optical disk 1). Address information, focus monitor signal, etc. are extracted. Then, the extracted reproduction RF signal is supplied to the encoder / decoder unit 8. The tracking error signal and the focus error signal are supplied to the servo circuit 9, and the address information is supplied to the address decoder 10 to be decoded and output as an absolute address.

The servo circuit 9 generates various servo drive signals according to the supplied tracking error signal, focus error signal, track jump command, seek command from the system controller 11, rotational speed detection information of the spindle motor 2, etc. Shaft mechanism 4 and sled mechanism 5
To control focus and tracking,
Further, the spindle motor 2 is controlled to a constant linear velocity (CLV).

The reproduced RF signal is sent to the encoder / decoder unit 8
After the EFM demodulation and the decoding process such as CIRC are performed by the memory controller 12, the buffer RAM 13 is temporarily processed by the memory controller 12.
Is written to. The reading of data from the magneto-optical disk 1 by the optical head 3 and the transfer of reproduced data in the system from the optical head 3 to the buffer RAM 13 are performed.
It is 1.41 Mbit / sec and is performed intermittently.

The data written in the buffer RAM 13 is read out at the timing when the reproduction data is transferred at 0.3 Mbit / sec, and is supplied to the encoder / decoder section 14. Then, a reproduction signal process such as a decoding process for the audio compression process is performed, an analog signal is formed by the D / A converter 15, and the analog signal is supplied from the output terminal 16 to a predetermined amplification circuit section and reproduced and output. For example, it is output as an L, R analog audio signal.

Here, writing / reading of data to / from the buffer RAM 13 is carried out by being addressed by the memory controller 12 under the control of the write pointer and the read pointer. The write pointer (write address) has been described above. As described above, the read pointer (read address) is incremented at a timing of 1.41 Mbit / sec, while the read pointer (read address) is 0.3 Mbit / se.
It is incremented at the timing of c. Due to this difference in bit rate between writing and reading, the buffer RAM 1
Within 3, a certain amount of data is stored. When the full capacity of data is accumulated in the buffer RAM 13, the increment of the write pointer is stopped, and the data read operation from the magneto-optical disk 1 by the optical head 3 is also stopped. However, since the read pointer is continuously incremented, the reproduced voice output is not interrupted.

Thereafter, only the read operation is continued from the buffer RAM 13, and at some point the buffer RAM 13
Assuming that the amount of data stored therein is equal to or less than a predetermined amount, the data reading operation by the optical head 3 and the increment of the write pointer are restarted again, and the data is again stored in the buffer RAM 13.

By outputting the reproduced sound signal via the buffer RAM 13 as described above, the reproduced sound output is not interrupted even if the tracking is missed due to disturbance or the like, and the data accumulation remains. By accessing the correct tracking position and restarting the data reading, the operation can be continued without affecting the reproduction output. That is, the seismic resistance function can be significantly improved.

The address information output from the address decoder 10 and the subcode data used for the control operation are transmitted via the encoder / decoder section 8 to the system controller 1
1 and is used for various control operations. The system controller 11 is composed of a microcomputer. Reference numeral 11a is an internal clock means for grasping the current year / month / day / hour / minute / second. Further, as will be described later, in this embodiment, subcode data is recorded together with main data such as voice, but during reproduction, the subcode data is taken out by the encoder / decoder unit 8 and the system controller 1
1 will be supplied. Further, the lock detection signal of the PLL circuit that generates the bit clock for the recording / reproducing operation and the monitor signal of the missing state of the frame synchronization signal of the reproduction data (L and R channels) are also supplied to the system controller 11.

Further, the system controller 11 outputs a laser control signal S _LP for controlling the operation of the laser diode in the optical head 3, and controls the output of the laser diode on / off, and at the time of on control, the laser It is possible to switch between an output at the time of reproduction, which has a relatively low level, and an output at the time of recording, which has a relatively high level.

When the recording operation is performed on the magneto-optical disk 1, the recording signal (analog audio signal) supplied to the input terminal 17 is converted into digital data by the A / D converter 18, Encoder / decoder unit 1
4 and is subjected to audio compression encoding processing. The recording data compressed by the encoder / decoder unit 14 is temporarily buffered by the memory controller 12.
The data is written in M13, read at a predetermined timing, and sent to the encoder / decoder unit 8. Then, the encoder / decoder unit 8 performs encoding processing such as CIRC encoding and EFM modulation, and then supplies the magnetic head driving circuit 6.

The magnetic head drive circuit 6 supplies a magnetic head drive signal to the magnetic head 6a according to the encoded recording data. That is, the magnetic head 6a applies an N or S magnetic field to the magneto-optical disk 1. At this time, the system controller 11 also supplies a control signal to the optical head so as to output a laser beam of a recording level.

Reference numeral 19 denotes an operation input section provided with keys used for user operation, and 20 denotes a display section composed of, for example, a liquid crystal display. The operation input unit 19 is provided with a record key, a play key, a stop key, an AMS key, a search key, etc. so that the user can operate them. 21
Is a timer recording mode switch, and the user can set the recording / reproducing apparatus to the timer recording mode by operating the switch. In the timer recording mode, the system controller 11 automatically starts recording operation control for the magneto-optical disk 1 when power is supplied.

When the recording / reproducing operation is performed on the disc 1, the management information recorded on the disc 1, that is, P-TOC (pre-mastered TOC), UT.
It is necessary to read OC (user TOC). The system controller 11 determines the address of the area to be recorded on the disc 1 and the address of the area to be reproduced according to the management information. This management information is held in the buffer RAM 13. Therefore, the buffer R
In the AM 13, the buffer area for the above-mentioned recorded data / reproduced data and the area for holding these management information are divided and set.

Then, the system controller 11 reads out these management information by executing a reproducing operation on the innermost circumference side of the disc on which the management information is recorded when the disc 1 is loaded, and stores it in the buffer RAM 13. It is possible to refer to the recording / reproducing operation for the disc 1 thereafter.

The U-TOC is edited and rewritten according to the recording and erasing of data, but the system controller 11 stores this editing process in the buffer RAM 13 for each recording / erasing operation. The TOC information is written and the U-TOC area of the disc 1 is rewritten at a predetermined timing according to the rewriting operation. For example, the U-TOC is rewritten on the disc 1 when the eject operation of the disc 1 is performed or when the power-off operation is performed.

The audio data sector recorded in the sector data form on the disk 1 and the P-TOC sector and U-TOC sector for managing the recording / reproducing operation of the audio data will be described.

2. P-TOC Sector As the management information for managing the recording / reproducing operation of the tracks in the mini disc 1, the P-TOC sector will be described first. As the P-TOC information, area designation such as a recordable area (recordable user area) of the disc and management of the U-TOC area are performed. When the mini disc 1 is a premastered disc which is a read-only optical disc, it is also possible to manage the music recorded in the ROM by the P-TOC.

FIG. 6 shows one sector (sector 0) of P-TOC information repeatedly recorded in an area for P-TOC (for example, the ROM area on the innermost side of the disc). The P-TOC sector exists from sector 0 to sector 7, but sector 1 and later are optional.

The data area of P-TOC sector 0 (4 bytes x 588, 2352 bytes) has all 0s at the head position.
Alternatively, a synchronization pattern composed of 1-byte data of all 1s, an address indicating a cluster address and a sector address, and the like are added by 4 bytes, and the header is formed. In addition, following the header, "MIN
Identification by ASCII code corresponding to the letter "I" I
D is added to indicate that it is a region of P-TOC.

Then, the disc type and recording level, the song number of the first song recorded (First TNO), the song number of the last song (Last TNO), the lead-out start address LO _A , the power cal area start Address P
C _A, U-TOC start address UST _A, a start address RST _A, etc. recordable area (recordable user area) is recorded.

Next, a corresponding table instruction data section having table pointers (P-TNO1 to P-TNO255) for making each music recorded in the pit form correspond to a parts table in a management table section described later is prepared. There is.

Then, in the area following the correspondence table instruction data portion, (01h) to (FF) corresponding to the table pointers (P-TNO1 to P-TNO255) in the correspondence table instruction data portion.
A management table section is prepared, which has 255 parts tables up to h). In this specification, "h"
Numerical values marked with are in so-called hexadecimal notation. In each part table, a start address as a starting point, an end address as an ending point, and mode information (track mode) of the part can be recorded for a certain part.

The mode information of the track in each parts table includes information as to whether the part is set to overwrite inhibition or data copy inhibition, whether it is audio information, monaural / stereo type, etc. Has been done.

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, a certain parts table (for example, (01h)) is recorded as the table pointer P-TNO1 for the first piece of music, and in this case, the start address of the parts table (01h) is the recording position of the first piece of music. And the end address is the end address of the position where the first music piece is recorded. Further, the track mode information becomes information about the first music piece. Actually, the table pointer has a numerical value that can indicate a certain parts table at the byte position in the P-TOC sector 0 by a predetermined calculation process.

Similarly, for the second music piece, the parts table indicated by the table pointer P-TNO2 (eg (02h))
The start address, end address, and track mode information of the recording position of the second tune are recorded in. Similarly, since the table pointers up to P-TNO255 are prepared, it is possible to manage up to the 255th song on the P-TOC. Then, by forming the P-TOC sector 0 in this way, a predetermined music piece can be accessed and reproduced, for example, during reproduction.

In the case of a recordable / reproducible mini disk, since there is no so-called pre-mastered music area, the above-mentioned correspondence table instruction data section and management table section are not used (these are U-TOC which will be described subsequently).
Therefore, each byte is all “00h”. However, for pre-mastered type discs in which all songs are recorded in ROM form (pit form), and hybrid type discs having both ROM area and magneto-optical area as areas for recording songs, etc., The correspondence table instruction data section and the management table section are used to manage the music in the ROM area.

3. U-TOC Sector Next, as the U-TOC, sector 0, sector 1, sector 2, and sector 4 of the U-TOC will be described. The U-TOC sector is also provided from sector 0 to sector 7, but sector 3 and sector 5 to 7 are undefined.

U-TOC sector 0 FIG. 7 shows the format of the U-TOC sector 0, which mainly contains management information about the music recorded by the user and the free area in which new music can be recorded. The data area is recorded. For example, when trying to record a certain piece of music on the mini disk 1, the system controller 11 searches for a free area on the disk from the U-TOC sector 0 and records audio data there. . Further, at the time of reproduction, the area in which the music to be reproduced is recorded is discriminated from the U-TOC sector 0, and that area is accessed for reproduction operation.

In the U-TOC sector 0 shown in FIG. 7, P
Like the TOC, a header is provided first, followed by a manufacturer code, model code, song number of the first song (First TNO), and song number of the last song (Last TN) at a predetermined address position
O), sector usage status (Used sectors), disk serial number, disk ID, and other data are recorded.

Furthermore, in order for the user to record and identify the area of the recorded music, the free area, etc. by associating them with the management table section, which will be described later, various table pointers (P
-The area for recording DFA, P-EMPTY, P-FRA, P-TNO1 to P-TNO255) is prepared.

Then, the table pointer (P-DFA to P-TNO25
As the management table section that will correspond to (5) (01h)
Up to 255 (FFh) parts tables are provided, and each parts table has the PT shown in FIG.
Similar to OC sector 0, a start address as a starting point, an end address as an ending point, and mode information (track mode) of the part are recorded for a certain part. 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 the can be recorded.

In this type of recording / reproducing apparatus, the reproduction operation is disturbed by physically discontinuously recording the data of one piece of music, that is, even if the data is recorded over a plurality of parts, the parts are accessed while being reproduced. Therefore, the music recorded by the user may be recorded in multiple parts for the purpose of efficiently using the recordable area.

Therefore, the link information is provided, and the parts tables can be connected by designating the parts table to be connected by the numbers (01h) to (FFh) given to the respective parts tables.
In addition, the link information is actually U-
It is indicated by a numerical value that is a byte position in TOC sector 0. That is, the parts table is designated as 304+ (link information) × 8 (byte). In addition, since a tune recorded in a pit form on a premastered disc or the like is not usually divided into parts, as shown in FIG. 6, all link information in the P-TOC sector 0 is “(00h)”. There is.

That is, in the management table section in the U-TOC sector 0, one part table represents one part, and, for example, a music piece formed by connecting three parts is linked by link information. The position of the parts is managed by the three parts tables.

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 the mini disk 1
The upper defect area is shown, and one part table in which a track portion (= part) which becomes a defect area due to a scratch or the like is shown or a head part table in a plurality of part tables is designated. In other words, if there is a defective part, (01h) ~ (F
One of Fh) is recorded 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. If there is no other defective part, the link information is, for example, "(00
h) ”and no link after that.

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 there is an unused part table, the table pointer P-EMPTY is used as the 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 is the mini disk 1
It shows the free area (including the erased area) where the above data can be written, and specifies the top parts table in one or more parts tables in which the track part (= parts) that is the free area is shown. ing. That is,
Table pointer P-FRA when free area exists
In (01h) ~ (FFh) is recorded,
In the corresponding parts table, parts that are free areas are indicated by start and end addresses. Also, if there are multiple such parts, that is, if there are multiple parts tables, the link information
Part tables with link information of "(00h)" are specified in sequence.

FIG. 8 schematically shows the management state of the parts which are the free area 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 corresponding table instruction data P-FRA and the parts table (03h) (18h) (1Fh). It shows the state represented by the link (2Bh) (E3h). Note that the management form of the above-mentioned defective area and unused parts table is similar to this.

By the way, in the case of a magneto-optical disk in which no audio data such as music is recorded and there is no defect,
Parts table (01h) by table pointer P-FRA
Is specified, which indicates that the entire recordable user area of the disc is a free area. In this case, the remaining part tables (02h) to (FFh) are not used, so the part table (02h) is specified by the above table pointer P-EMPTY, and the part table (02h) The parts table (03h) is specified as the link information, and so on, and the parts table (FFh) is linked. 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, the parts table (0
For 1h), 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.

Table pointers P-TNO1 to P-TNO255 indicate music pieces recorded by the user on the magneto-optical disk 1. For example, in the table pointer P-TNO1, one or a plurality of pieces of data in which the first music piece is recorded are recorded. The parts table that indicates the temporally first part of the parts is specified. For example, when the track designated as the first song is recorded on the disc without dividing the tracks, that is, when it is recorded by one part, the recording area of the first song is the start and the start in the parts table indicated by the table pointer P-TNO1. It is recorded as the end address.

Further, for example, when the second music piece is discretely recorded in a plurality of parts on the disc,
Each part is designated in chronological order to indicate the recording position of the music. That is, the table pointer P-TNO2
From the parts table specified in, the other parts tables are sequentially specified by the link information according to the temporal order, and the parts table having the link information of "(00h)" is connected (similarly to FIG. 8 above. Form). In this way, for example, all the parts in which the data constituting the second song is recorded are sequentially designated and recorded, so that the data of the U-TOC sector 0 is used to reproduce the second song or the second song. When overwriting the area (1), the optical head 3 and the magnetic head 6 can be accessed to take out continuous music information from discrete parts, and recording can be performed efficiently using the recording area.

U-TOC Sector 1 FIG. 9 shows the format of the U-TOC sector 1, which is input mainly when the user gives a song title or a disc title to the recorded music. This is a data area for recording character information.

In this U-TOC sector 1, slot pointers P-TNA1 to P-TNA255 are prepared as character slot instruction data parts corresponding to the recorded music pieces. A character slot portion designated by the slot pointers P-TNA1 to P-TNA255 is prepared. 1 for character slot
Slots (01h) to (FFh) of 255 units are formed with a unit of 8 bytes, and character data is managed in a form similar to that of the U-TOC sector 0 described above.

Character information such as a disc title (disc name) and a song title (track name) is recorded in the slots (01h) to (FFh) in ASCII code. The 8-byte slot before the slot (01h) is a dedicated area for the disc name.

Then, for example, the character designated by the user corresponding to the first music piece is recorded in the slot designated by the slot pointer P-TNA1. Also, by linking the slots with link information,
Character input corresponding to one music can be supported even if it is larger than 7 bytes (7 characters). In this U-TOC sector 1, the slot pointer P-EMPTY manages an unused slot. That is, the above-mentioned U
-Unused slots are managed in the same way as the unused parts table management method using the table pointer P-EMPTY of TOC sector 0.

U-TOC Sector 2 FIG. 10 shows the format of the U-TOC sector 2, which is mainly a data area for recording the recording date and time of the music recorded by the user.

In this U-TOC sector 2, slot pointers P-TRD1 to P-TRD255 are prepared as date / time slot instruction data parts corresponding to the recorded music pieces, and these slot pointers P-TRD1 to P-TRD255 are also provided. A date / time slot portion designated by is prepared. In the date / time slot portion, 255 units of slots (01h) to (FFh) are formed with 1 unit of 8 bytes, and date / time data is managed in a form similar to that of the U-TOC sector 0 described above.

In the slots (01h) to (FFh), the recording date and time of the music (track) is recorded in 6 bytes. The 6 bytes each contain 1 byte, and the numerical values corresponding to the year, month, day, hour, minute, and second are recorded. The remaining 2 bytes are a maker code and a model code, and code data indicating the manufacturer of the recording device that recorded the music and code data indicating the model of the recording device that recorded the music are recorded. The 8-byte slot before the slot (01h) is an area for recording date and time data for the disc.

For example, when a piece of music is recorded on the disc as the first piece of music, the recording date and time, the manufacturer code and model code of the recording device are recorded in the slot designated by the slot pointer P-TRD1. The recording date / time data is automatically recorded by the system controller 11 by referring to the internal clock 11a.

In this U-TOC sector 1, the slot pointer P-EMPTY manages the unused slot. For unused slots, link information is recorded instead of the model code, and each unused slot is managed by linking with the slot pointer P-EMPTY at the head.

Like the sector 1, the U-TOC sector 4 records the input character information when the user gives a song title or disc title to the recorded song. The area is a data area, and the format is almost the same as in FIG. However, in this sector, code data corresponding to Chinese characters and European characters are recorded. In addition to the data of sector 1 in FIG. 9, the attribute of the character code used as the character code is recorded at a predetermined byte position. . Management of character information of this U-TOC sector 4
Similarly, the slot pointers P-TNA1 to P-TNA255 and the slot pointers P-TNA1 to P- are used as character slot instruction data parts.
255-unit slot (01h) specified by TNA255
~ (FFh).

4. Subcode Next, the subcode in the mini disk system used in this embodiment will be described. When recording audio data that is the main data, the encoder / echoda unit 8
Sub-code data is added as a signal form after EFM modulation in. That is, the system controller supplies the subcode data to the encoder / echoda unit 8 corresponding to the EFM encoding of the main data, and records this in the main data frame on the disc 1.

The minimum unit of EFM modulated data recorded on the disc is one frame. One block is composed of 98 frames. The structure of one frame is as shown in FIG. One frame is composed of 588 bits, and the first 24 bits are the synchronization data and the subsequent 14 bits are the subcode data area. Then, after that, data (main data) and parity are arranged.

One frame is composed of 98 frames, and sub-code data extracted from 98 frames is collected to form one block of sub-code data as shown in FIG. 4A. . First and second frames of 98 frames (frames 98n + 1,
The subcode data from the frame 98n + 2) is a synchronization pattern. Then, from the third frame to the 98th
Frame (frame 98n + 3 to frame 98n + 9
Up to 8), 96-bit channel data, that is, P, Q, R, S, T, U, V, W subcode data is formed.

Of these, the Q channel is used to record address information in the pit area of the disk 1, but conventionally no subcode is used in the magneto-optical area. In this embodiment, the Q channel is used even in the magneto-optical area to realize various operations that were impossible in the past.

96-bit Q channel data is shown in FIG.
It is configured as shown in (b). First, 4 bits of Q _{1 to} Q ₄ are control data, and 4 bits of Q _{5 to} Q ₈ are addresses. However, these are based on the so-called Q channel format in the CD system, and in this embodiment, the control data and address are all "0" and are not used. Subsequent Q _{9 to} Q ₈₀ are recorded with actual sub Q data, and the remaining Q _{81 to} Q ₉₆ are CRC.

In the mini-disc system, sub-Q data of Q _{9 to} Q ₈₀ is defined in the pit area as shown in FIG. 5A. That is, the cluster upper address (Cluster H), the cluster lower address (Cluster L), and the sector address (Sector) are only recorded. On the other hand, since sub-Q data is not defined in the magneto-optical area, it is used as shown in FIG. 5B or 5C in this embodiment.

In FIG. 5B, a track number, an index, a recording ID, a year, a month, a day, an hour, a minute,
It is defined to record seconds. When this format is adopted, the system controller 11 supplies a track number, an index, and a recording ID to the encoder / coder unit 8 when recording the input audio signal (main data) on the disc 1. . Further, the date and time information by the internal clock 11a is sequentially supplied. As a result, together with the main data, the information related to the recording is recorded on the disc 1 as subcode data.

Further, in FIG. 5C, it is defined that 7 bytes of character data can be recorded together with the track number and index. For example, by previously inputting arbitrary character information such as lyrics about a song to be recorded by the user or various memos, the system controller 11 causes the character / information to be encoded as sub-code data along with the EFM encoding operation of the main data. The data is supplied to the decoder unit 8 and recorded on the disc 1.

5. Example of operation realized by subcode recording By defining the subcode in the magneto-optical area in this way, it is possible to realize a recording operation by an external timer, a time stamp, a large amount of character recording, etc., as a recording / reproducing device of a mini disk system. .

A specific processing example that can be applied to the timer recording operation will be described. In this case, it is assumed that the Q channel format of FIG. 5B is adopted as the subcode and the system controller 11 also records the subcode data in the frame form of FIG. 3 on the disc 1 when recording the main data. .

FIG. 2 shows the processing of the system controller 11 when the power is turned on. When the power of the recording / reproducing apparatus is turned on by an operation of an external timer or a user, the system controller 11 first reads TOC data from the loaded disk 1 and holds it in the buffer RAM 13 (F101). Then, the track mode of the first part which becomes the free area from the U-TOC sector 0 is determined. In other words, look at the track mode of the parts table specified by the table pointer P-FRA (F102). Here, the track mode of the parts table is defined to show the attributes of the data recorded as that part, but there is no track for the part that is the free area, so the track mode is defined. No, it is usually all "00h".

In the present embodiment, the track mode of the parts table corresponding to the parts which are the free areas is used, and among the parts in which the main data is actually recorded, they are managed as tracks on the U-TOC. It is supposed to identify whether or not there is a missing part. For this reason, as will be described later, when performing timer recording, first, the recording is performed as the track mode of the parts table corresponding to the first free area parts to be recorded before the start of recording I
I am trying to record D (F110).

The track mode of the parts table designated by the table pointer P-FRA is usually "00h", but the main data and the subcode data are recorded by the timer recording. , If the recorded part is not managed as a track on the U-TOC, an 8-bit numerical value other than "00h" which is the recording ID is recorded in the track mode. In other words, if the power supply is turned off by setting the end time by the external timer and the parts recorded as main data and sub-code data by the recording / reproducing device up to that point are not reflected as tracks on the U-TOC, the free area A numerical value as a record ID is recorded in the track mode of the first part of.

If the track mode is "00h", the process proceeds from step F103 to F111. Here, when the timer recording mode is set by the timer recording mode switch 21, the system controller 11 starts the recording operation control. First, the process proceeds from step F111 to F112, and the record ID is written in the track mode of the part table of the first part in the free area, that is, the part table designated by the table pointer P-FRA. For example, in FIG.
As the track mode of the first parts table, a certain 8-bit numerical value (ID _(X) ) is set to U-
Write to TOC sector 0. The numerical value (ID _(X) ) as the recording ID may be any numerical value, and may be generated randomly, for example.

Then, in step F113, the subcode data in the format shown in FIG. 5B is encoded together with the input audio data and recorded on the disc 1. As the subcode data, the same recording ID as the recording ID recorded in the track mode in step F112 is recorded. Also, the current date and time data is sequentially taken out from the internal clock 11a and recorded as subcode data. Further, as the track number, the track number next to the last track number shown on the U-TOC so far may be recorded. Further, when a track change or the like of the input audio data is detected by detecting silence, the track number may be incremented to be generated and recorded as subcode data.

This recording operation may be continued, and in some cases, the recording may be completed before the power supply from the external audio timer is stopped, and the U-TOC may be properly updated. In such a case, the recorded part is updated so as to be a new track from the free area. However, if the power supply from the external audio timer is stopped while the main data and sub-code data are being recorded, the U-TOC cannot be updated on the disc 1 and the recorded parts are managed as free areas. It remains. That is, the recording operation becomes invalid as it is. In this embodiment, the U-TOC can be updated such that such an invalid portion becomes a valid recording track when the power is turned on next time.

That is, if the track mode of the parts table of the first part in the free area is not "00h" when the power is turned on, the system controller 11
It can be seen that there is an area which is not managed as a track on the U-TOC although the main data (audio data) and the subcode data are actually recorded. Therefore, the process proceeds to step F104, and the parts that are the free area on the U-TOC are read from the beginning.
That is, in the case of FIG. 8, the address S ₀₃ is first accessed to start the reproduction, and the reproduction is performed up to the address E ₀₃ . Find the parts table (18h) and follow the link information on the U-TOC Then, access the address S ₁₈ to initiate the playback, to play to address E _18. in this way,
Play through the free areas in sequence.

Then, during this reproducing operation, the subcode data is decoded, and if the CRC decoding is correct (F105), it is confirmed whether or not the record ID exists in the subcode data (F106). That is, it is checked whether or not the same numerical value as the 8-bit numerical value (ID _(X) ) recorded in the track mode of the first parts table in the free area is extracted.

As described above, when the subcode is reproduced in the free area, the portion where the recording ID is extracted is
UT even though the main data was recorded
It can be seen that it is a region that is not reflected on the OC. Therefore, the free area is played back to the point where the recording ID cannot be extracted, and when it comes to the point where the recording ID cannot be extracted, it is known that it is the point where the timer recording has ended, that is, the end of the track by timer recording. The address can be detected. Therefore, start _{S03 of the} free area as the start address,
In addition, the end of the detection of the recording ID is used as an end address, and the U-TO is used to manage this as a track.
Update C (F107, F108).

When a plurality of tracks are recorded by timer recording, the track number of subcode data changes during the reproduction of the free area. Therefore, even if the track number changes, the start address and end address of the track up to that point can be detected, and the U-TOC is updated to manage this as a track (F109, F110).

By the above processing, it becomes possible to properly execute the recording by the external timer device without having a backup means such as a non-volatile memory.

In addition to the timer recording, the recording ID is written as the track mode of the first part of the free area even in the normal recording operation in order to cope with the sudden power supply stoppage due to the disconnection of the outlet during recording. Then, the processing shown in FIG. 2 may be performed.

By the way, even during the timer recording operation, for example, every 10 seconds, every 30 seconds, the U-T is regularly recorded on the disk.
If the OC is updated, it is possible to reduce the number of recorded portions that are not reflected in the U-TOC as recording tracks.
Therefore, the processing time between steps F104 and F110 of FIG. 2 can be shortened.

By recording the sub-code data shown in FIG. 5B together with the main data, it is possible to record an accurate recording date and time as a time stamp in units of 98 frames of the EFM signal. That is,
In addition to the date and time when recording is started in the U-TOC sector 2, the recording date and time in units of 98 frames is recorded as a subcode in correspondence with the voice that is the main data.

Therefore, the date and time and the end date and time of the recorded track can be accurately known, and the system controller 11 can display the date and time data based on this subcode on the display unit 20 during reproduction, for example. Also, even if editing such as dividing and connecting tracks is performed, each
Since the recording date and time in units of 8 frames are recorded, it is possible to know the exact recording date and time for each part in the track.

If subcode data is recorded in the format shown in FIG. 5C, a large amount of character information can be recorded. For example, it is possible to record the lyrics of a song as a subcode in accordance with the music that is the main data and display it during playback. It is also possible to record characters such as the composer, the lyricist, and the performer, and it is also possible to record character information that is not directly related to the main data on the disc 1.

Although the embodiments have been described by using the subcodes shown in FIGS. 5B and 5C, various kinds of applications can be realized by further setting the subcode format. Needless to say. For example, recording sub audio data may be considered.

[0102]

As described above, according to the present invention, the management information about the main data to be recorded is provided, and the management information is recorded as the recording / reproducing device for the recording medium which is updated after the recording is finished. At the same time, various data can be recorded by using the sub-code data, so that various applications can be realized.

For example, even when the management information cannot be updated due to recording by an external timer device or sudden power stop, and the recorded contents up to that point are invalidated, the management information is updated correctly by using the subcode data later. It is possible to make the recorded contents effective as a recording track. Moreover,
Therefore, a backup means such as a non-volatile memory is not necessary.

Further, it is possible to record the correct date and time of the main data recorded as the time stamp function in association with the main data. Further, it is possible to record a large amount of character information correspondingly, and it is possible to record lyrics corresponding to music to be recorded.

[Brief description of drawings]

FIG. 1 is a block diagram of a recording / reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a flowchart of operation processing when the recording / reproducing apparatus of the embodiment is turned on.

FIG. 3 is an explanatory diagram of a frame structure of an EFM signal according to an embodiment.

FIG. 4 is an explanatory diagram of subcode data.

FIG. 5 is an explanatory diagram of a subcode Q channel format defined in the embodiment.

FIG. 6 is an explanatory diagram of P-TOC sector 0.

FIG. 7 is an explanatory diagram of a U-TOC sector 0.

FIG. 8 is an explanatory diagram of a link form of U-TOC sector 0.

9 is an explanatory diagram of a U-TOC sector 1. FIG.

FIG. 10 is an explanatory diagram of a U-TOC sector 2.

[Explanation of symbols]

 1 disk 3 optical head 8 encoder / decoder section 10 address decoder 11 system controller 11a internal clock 19 operation section 20 display section 21 timer recording mode switch

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 (6)

[Claims] 1. A recording device corresponding to a recording medium, comprising an area in which management information about main data to be recorded is recorded, and the management information is updated according to a recording operation after the recording operation is completed. A recording device, characterized in that, when recording the main data, the information about the main data can be recorded as subcode data on the recording medium. 2. The sub-code data is configured to record information related to information to be expressed on the management information with respect to recorded main data. The recording device described. 3. When the main data and the sub-code data are recorded in an unrecorded area on the recording medium, after the recording operation, the information related to the information to be expressed on the management information about the recorded main data. By using the subcode data that becomes, the area where the main data is recorded is managed from the unrecorded area to the recorded area,
The recording device according to claim 2, wherein the recording device is configured to be able to update the management information. 4. Identification data indicating that recording is executed in an unrecorded area in the management information when main data and subcode data are recorded in an area managed as an unrecorded area on a recording medium. 4. The recording apparatus according to claim 3, wherein the recording information is recorded, and the updating operation of the management information using the subcode data is executed at a predetermined time point according to the identification data. . 5. The recording apparatus according to claim 1, wherein, as the sub-code data, information which is not related to information to be expressed on the management information with respect to recorded main data is recorded. . 6. An area for recording management information about recorded main data is provided, said management information being updated according to a recording operation after the recording operation is completed, and at the time of recording the main data. As a reproducing apparatus corresponding to a recording medium in which information about the main data is recorded as subcode data, it is configured to be able to decode the subcode data and output the subcode data contents when reproducing the main data. A playback device characterized by the above.