JPH08321160A - Recording device - Google Patents

Abstract

PURPOSE: To obtain a recording apparatus by which a recorded content is reproduced efficiently and by which a recording capacity is utilized effectively by detecting a region which is soundless in a recorded region, managing the region as an unrecorded region on a recording medium, and updating and controlling the region. CONSTITUTION: In a recording operation, a recording signal which is inputted to an input signal 17 is supplied to a magnetic head 6a via an A/D conversion part 18, an encoder/decoder part 14, a memory controller 12 and an encoder/ decoder part 8, it outputs a laser beam, and it is recorded. After the recording has been finished, a system controller 11 reads out data recorded by an optical head 3, and it detects a sound level by a level meter part 8a. At this time, it is judged whether a sound is in a soundless state or not, and a soundless start address and a finish address are detected so as to be used an unrecorded regions on a recording medium, and control information is updated. Thereby, in reproducing, a soundless region is not reproduced, it is not required to listen to a wasteful soundless state, and a recorded content can be reproduced efficiently. In addition, the recording capacity of the recording medium can be utilized effectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording device capable of recording using a recording medium such as a magneto-optical disk.

[0002]

2. Description of the Related Art Various recording devices using recording media such as magnetic tapes and magneto-optical disks have been put to practical use, and are widely used for recording music and the like, as well as recording conferences and interviews. There is.

[0003]

By the way, when recording a meeting or the like, if the time during which no speech is made is prolonged, the recorded disk or the like is in a silent state in which there is no meaningful sound due to only minute noise. Area will occur. When there is a silent area in such a recording area, at the time of reproduction, even if it becomes a silent part, the reproduction is continued and waits until the utterance is reproduced, or when it is frustrating to wait. Requires manual operations such as fast-forwarding, which is a very inconvenient source for listening during playback. Further, the use of the recording area as a silent portion causes a waste of the recordable time of the recording medium.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and when there is a silent portion in a recorded area on a recording medium, it is erased.
The purpose is to enable handling as an unrecorded area.

For this reason, the silent area detecting means for detecting a silent area in the recorded area on the recording medium and the silent area detected by the silent area detecting means are the unrecorded areas on the recording medium. And a control unit capable of controlling the update of the management information so as to be managed as.

[0006]

After the recording, the recording device automatically reads the recorded data and detects the level, so that the silent region can be confirmed. Therefore, if there is a silent area, by managing it as an unrecorded area, that area is not played during playback, and it is not necessary to perform a wasteful playback time or perform a playback operation such as fast forward.

[0007]

Embodiments of the recording apparatus of the present invention will be described below. 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. U-TOC sector 3. Auto space delete operation

1. Configuration of Recording / Reproducing Apparatus FIG. 1 is a block diagram of a main part of the recording / reproducing apparatus of the embodiment. Magneto-optical disk 1 with audio data recorded
Are driven to rotate by the spindle motor 2. The optical head 3 irradiates the magneto-optical disk 1 with laser light during recording / reproduction.

The optical head 3 outputs a high level laser for heating the recording track to the Curie temperature during recording, and a relatively low level laser for detecting data from reflected light by the magnetic Kerr effect during reproduction. Output. Therefore, the optical head 3 is equipped with a laser diode as a laser output means, an optical system including a polarization beam splitter and an objective lens, and a detector for detecting reflected light. The objective lens 3a is 2
It is held by the shaft mechanism 4 so as to be displaceable in the radial direction of the disk and in the direction of moving toward and away from the disk.

A magnetic head 6a is arranged at a position facing the optical head 3 with the disk 1 interposed therebetween. The magnetic head 6a performs an operation of applying a magnetic field modulated by the supplied data to the magneto-optical disk 1. The entire optical head 3 and the magnetic head 6a are movable in the disk radial direction by the sled mechanism 5.

The information detected from the disk 1 by the optical head 3 by the reproducing operation is supplied to the RF amplifier 7. The RF amplifier 7 processes the supplied information,
A reproduction RF signal, a tracking error signal TE, a focus error signal FE, groove information (absolute position information recorded as a pre-groove (wobbling groove) on the magneto-optical disc 1) GFM and the like are extracted. The extracted reproduction RF signal is supplied to the encoder / decoder unit 8. The tracking error signal TE and the focus error signal FE are supplied to the servo circuit 9, and the groove information GFM is supplied to the address decoder 10.

The servo circuit 9 is supplied with the tracking error signal TE, the focus error signal FE, and the system controller 1 composed of a microcomputer.
Various servo drive signals are generated according to the track jump command, the access command, the rotation speed detection information of the spindle motor 2 and the like, and the biaxial mechanism 4 and the sled mechanism 5 are controlled to perform focus and tracking control. 2 is controlled to a constant linear velocity (CLV).

The address decoder 10 decodes the supplied groove information GFM to extract the address information.
This address information is supplied to the system controller 11 and used for various control operations. Also, the reproduction RF signal is subjected to EFM demodulation, decoding such as CIRC in the encoder / decoder section 8, and at this time, the address included in the reproduction RF signal as data,
Subcodes are also extracted, and the system controller 11
Is supplied to.

In the encoder / decoder section 8, EFM demodulation,
The decoded audio data (sector data) such as CIRC is once written in the buffer memory 13 by the memory controller 12. The reading of data from the disk 1 by the optical head 3 and the transfer of the reproduced data in the system from the optical head 3 to the buffer memory 13 are 1.41 Mbit / sec, and are performed intermittently.

The data written in the buffer memory 13 is read out at a 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.

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 written in the buffer memory 13 by the memory controller 12. Then, when a predetermined amount or more of data is accumulated in the buffer memory 13, the data is read in a predetermined data unit and sent to the encoder / decoder unit 8. Then, the encoder / decoder unit 8 uses CIRC.
After being encoded, EFM modulated, etc.,
It is supplied to the magnetic head drive 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 magneto-optical disk 1
Then, the magnetic field of N or S is applied by the magnetic head 6a. 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. By passing through the buffer memory 13, the recording operation for continuously input audio data is intermittently performed.

The operation unit 19 is provided with various keys used for user operations. For example, a record key, a play key, a stop key, an AMS key, a fast-forward key, a fast-return key, etc. are provided, and the operation information is the system controller 11
Is supplied to. The display unit 20 is composed of, for example, a liquid crystal display, and performs an operation of displaying an operation state, a track number, time information and the like under the control of the system controller 11.

Further, in the encoder / decoder section 8, a functional portion as a level meter section 8a is provided. The level meter unit 8 a can detect the level of reproduced data of the data read from the disc 1, and the level detection information is supplied to the system controller 11.

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), U-T.
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 memory 13. For this reason, in the buffer memory 13, the above-mentioned recording / playback data buffer area 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 memory 13. After that, it can be referred to during the recording / reproducing operation for the disc 1.

The U-TOC is edited and rewritten in response to recording and erasing of data, but the system controller 11 stores this editing process in the buffer memory 13 every recording / erasing operation. -TOC information is performed, and the U-TOC area of the disc 1 is also rewritten at a predetermined timing according to the rewriting operation.

2. U-TOC sector Here, as management information for managing recording / reproducing operations of tracks (musical pieces, etc.) on the disc 1, a UT is used.
The OC (User TOC) sector will be described. Note that U-TOC and P-TOC (pre-mastered TOC) are provided as TOC information.
Is formed in the innermost pit area of the disc 1 and is read-only information. The P-TOC manages the positions of the recordable area (recordable user area), the lead-out area, the U-TOC area, etc. of the disc. In the mini-disc system, a read-only optical disc in which all data is recorded in the form of pits can be used, but in the case of a read-only optical disc, management of songs recorded in ROM by P-TOC is also possible. The U-TOC is not formed. Detailed description of the P-TOC is omitted, and here, the U-TOC provided in the recordable magneto-optical disk will be described.

FIG. 6 shows the format of the U-TOC sector 0. As U-TOC sectors, sectors 0 to 7 can be provided.
Sectors 1 and 4 are character information, and sector 2 is an area for recording the recording date and time. Here, disk 1
Only the U-TOC sector 0, which is absolutely necessary for the recording / reproducing operation, will be described. The U-TOC sector 0 is mainly used as a data area in which management information about music recorded by the user and free areas in which new music can be recorded is recorded. For example disk 1
When attempting to record a certain piece of music, 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.

The data area of U-TOC sector 0 (4 bytes x 588, 2352 bytes) has all 0s at the head position.
Alternatively, a synchronization pattern formed by arranging 1-byte data of all 1s is recorded. Then the cluster address (Clust
er H) (Cluster L) and sector address (Sector), and mode information (MODE) are added in 4 bytes,
This is the header.

The sector is a data unit of 2352 bytes as described above, and 36 sectors make up one cluster. For synchronization patterns and addresses, refer to this U-TO
Not only the C sector 0 but also a P-TOC sector and a data sector in which audio data is actually recorded are recorded in the sector unit. The cluster address is the upper address (Cluster H) and the lower address (Cluster L).
It is written in bytes, and the sector address (Sector) is written in 1 byte. Next, at the specified byte position, the manufacturer code, model code, and the track number (F
irst TNO), the track number of the last track (Last TNO
NO), sector usage status (Used sectors), disk serial number, disk ID, and other data are recorded.

Further, in order to identify an area of a track (song or the like) recorded by the user by recording and a free area and the like by associating them with a management table section described later, various tables are provided as a correspondence table instruction data section. Pointer (P-DFA, P-EMPTY, P-FRA, P-TNO1 to P-TN
Area for recording (O255) 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. In each parts table, the start address, the end address, and the mode information (track mode) of a certain part are recorded. ing. In addition, since the parts shown in each parts table may be connected to other parts in succession, link information indicating the parts table in which the start address and end address of the connected parts are recorded can be recorded. Has been done. In this specification, the numerical value with "h" is so-called hexadecimal notation. Further, the part means a track portion in which temporally continuous data is physically continuously recorded in one track.

In this type of recording / reproducing apparatus, the reproduction operation is impeded by physically discontinuously reproducing the data of one music piece, 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, link information is provided so that the parts tables can be linked by designating the parts tables to be linked by the numbers (01h) to (FFh) given to the respective parts tables.
That is, in the management table section in the U-TOC sector 0, one part table represents one part. For example, for a music piece formed by connecting three parts, three parts connected by link information are used. The position of the part is managed by the table. In addition, actually, the link information is represented by a numerical value which is a byte position in the U-TOC sector 0 by a predetermined arithmetic processing. That is, the parts table is designated as 304+ (link information) × 8 (byte).

Each part table from (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 attached to a defective area on the magneto-optical disk 1, and is a single part table or a plurality of parts tables in which a track portion (= part) which is a defective area due to a scratch or the like is shown. The top parts table in is specified. In other words, if there is a defective part, (01h) ~
Either (FFh) is recorded, and the defective parts are 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, "(0
0h) ”and no link after that.

The table pointer P-EMPTY indicates the head 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.

A table pointer P-FRA indicates a writable free area (including an erasing area) on the magneto-optical disk 1, and 1 or the track portion (= part) which becomes the free area is indicated. The first part table in multiple part tables is specified. 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. 7 schematically shows the management state of the parts which are the free area by using 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 tracks such as songs recorded by the user on the magneto-optical disk 1, and for example, table pointers.
The P-TNO1 specifies a parts table that indicates a part that is the first in time among one or a plurality of parts in which the data of the first track is recorded. For example, if the track designated as the first track is not divided on the disc,
In other words, if recorded in one part, the first
The recording area of the track is recorded as the start and end addresses in the parts table indicated by the table pointer P-TNO1.

Further, for example, when a music piece designated as the second track is discretely recorded in a plurality of parts on the disc, each part is designated according to the temporal order in order to indicate the recording position of the second track. To be done. In other words, from the parts table specified by the table pointer P-TNO2, further parts tables are sequentially specified by the link information according to the temporal order, and the parts table whose link information is "(00h)" is linked. (The above-mentioned form similar to FIG. 7). In this way, for example, all the parts in which the data constituting the second music piece is recorded are sequentially designated and recorded, so that the data of the U-TOC sector 0 is used to reproduce the second music piece or record the second music piece. When performing overwriting recording on the recorded area, it is possible to access the optical head 3 and the magnetic head 6 to take out continuous music information from discrete parts, and to perform recording using the recording area efficiently.

As described above, in the rewritable magneto-optical disk 1, area management on the disk is performed by the P-TOC, and music recorded in the recordable user area, free area, and the like are performed by the U-TOC. Be done.

3. Auto Space Delete Operation Next, the auto space delete operation, which is a feature of this embodiment, will be described. In the recording / reproducing apparatus of the present embodiment, for example, when a voice such as a conference is recorded, a silent area, that is, an area in which a utterance is interrupted and a meaningless silent state is recorded is automatically detected after the recording. By incorporating it in the free area, it is possible to prevent unnecessary reproduction of a silent state at the time of reproduction, eliminate useless recorded areas, and make effective use of the area on the disc. For the sake of explanation, this operation function will be called auto space delete.

Now, it is assumed that audio data is recorded on a disk 1 as shown in FIG. 3A when audio data is recorded at a conference. In addition, here, there is one track (track #
Suppose it was recorded as 1). Depending on the recording operation,
As shown in FIG. 3A, tracks # 1 are assigned to addresses A _{0 to} A _5.
The content of the meeting is recorded as and the remaining addresses A _{6 to} A
It is assumed that ₇ is left as a free area.

The U-TOC management state at this time is, for example, as shown in FIGS. 4A and 5A. That is,
For track # 1, as shown in FIG. 4A, a certain parts table (01h) is set by the table pointer P-TNO1.
Is designated, and the start address of the track # 1 is recorded as the address A ₀ and the end address thereof is recorded as the address A ₅ in the parts table (01h). In this case, since the track # 1 is recorded as one part, the link information of the parts table (01h) is "00h".
Becomes

FIG. 5 shows the free area F ₁ .
As shown in (a), a certain parts table (02h) is designated by the table pointer P-FRA, and in the parts table (02h), the start address as a free area is the address A ₆ and the end address is the address A _7. Will be recorded. Further, in this case, since the free area has only one part which is the free area F ₁ ,
The link information of the parts table (02h) is "00h".

However, it is assumed that the recording content of the track # 1 has a portion in which the recording progresses in the time period when there is no utterance, as shown by "silence" in FIG. 3 (a). That is, it is assumed that no meaningful voice is recorded in the area of addresses A _{2 to} A ₃ .

In such a recording state by the recording operation, the recording / reproducing apparatus of this embodiment executes the auto space delete operation. The processing of the system controller 11 for the auto space delete operation is shown in FIG.

After the recording is completed, the system controller 11 first starts the level detection search automatically or by an operation of the user designating the execution of the auto space delete operation (F101). In this process, as shown in FIG. 3B, the optical head 3 is made to access the head position of the recorded track and the data is read.

With respect to the read data, the sound level is detected by the level meter section 8a and supplied to the system controller 11. When the system controller 11 starts the level detection search, step F1
The audio level detected at 03 is monitored to determine whether it is lower than a predetermined level (XdB). The XdB is a threshold value of whether the voice is in a silent state or not, and is, for example, -30 to -60.
It may be set to any of the order of dB.

Note that the read operation of the optical head 3 relating to this level detection search does not actually output the read data as the reproduced sound, so it is necessary to intermittently execute it due to the buffer memory 13 or the like. Instead, it may be executed continuously at a high rate. In addition, since this level detection search is performed for all areas in which data is recorded, the disk 1 is rotated at a higher speed than usual and read at a faster rate in order to prevent the entire auto space delete operation from taking a long time. Alternatively, the entire process may be partially read by repeating skipping (small track jump) to some extent.

When the level detection search proceeds from the address A ₀ , a negative result is output in step F103 at the portion where the conference voice is normally recorded, and no processing is performed, but FIG. 3 (c). When the optical head 3 advances to address A ₂ as shown in, the audio data read at that time is X dB.
The following is detected. Therefore, the system controller 11 stores the address A ₂ as the silence start address in step F104.

Then, in step F105, the detected voice level is monitored, and this time, the voice level is a predetermined level (X
It will be determined whether or not it has become equal to or higher than dB). FIG.
As the level detection search progresses from the state of (c), FIG.
When the reading by the optical head 3 progresses to the position of the address A ₄ , as shown in FIG. 5, audio data of level X dB or higher is detected at that time. Then, the system controller 11
Stores the silent end address in step F106. The silence end address is an address immediately before the address where the voice data of level XdB or higher is detected, and in this case, it is the address A ₃ .

When the silent area is thus discriminated, in steps F107 and F108, the system controller 11 sets U between the silent start address A ₂ and the address A ₁ and the silent end address A ₃ and the address A _4. The track division processing is performed on the TOC data, and the addresses A _{2 to} A ₃ which are silent areas are taken out as one part. And
In step F109, the parts with the addresses A _{2 to} A ₃ are U
-To be managed as a free area on the TOC,
Also it made to be a portion excluding a part of the address A ₂ to A ₃ is the track # 1. In other words, as shown in FIG. 3 (e), the address A ₂ to A ₃ is a free area F ₂ followed by free area F _1, also track # 1, and part addresses A ₀ to A _1, the address A It should be made up of 2 parts, _{4 to} A ₅ .

An example of the management state in the U-TOC in this state is shown in FIGS. 4 (b) and 5 (b). That is, track # 1
Regarding the table pointer P-TN as shown in FIG.
In the parts table (01h) designated by O1, addresses A ₀ to become the first half parts as the track # 1.
A ₁ is marked. Then, for example, the parts table (04h) is specified by the link information of the parts table (01h), and the addresses A _{4 to} A _{5 which} are the latter half parts of the track # 1 are written in the parts table (04h). .

FIG. 5 shows the free area F ₁ .
As shown in (b), the free area F is added to the parts table (02h) designated by the table pointer P-FRA.
_Although the start address and end address as ₁ are recorded as the address A ₆ and the address A ₇ , the part table (03h) is specified by the link information of this part table (02h). And in the part table (03h), so that the address A ₂ to A ₃ is designated as a free area F _2.

In this way, the system controller 11 continues the level detection search while performing the process of incorporating the silent area into the free area when it finds the silent area, and when the silent area is detected again, the processing of step F104 and thereafter is executed. , The silent area is incorporated in the free area.
Then, when the optical head 3 proceeds as shown in FIG. 3F and the level detection search is completed for the recorded area, the processing is ended from step F102.

In the recording / reproducing apparatus of this embodiment, by performing the above auto space delete operation,
Even if a silent area occurs, it is automatically deleted from the recording area, and therefore such a silent area is not reproduced at the time of reproduction. That is, when reproducing the disc in the state shown in FIG. 3F, the addresses A _{4 to} A ₅ are reproduced following the addresses A _{0 to} A ₁ as the reproduction of the track # 1. For this reason, the user does not need to perform a troublesome operation such as fast-forwarding at the time of reproduction, and can efficiently listen to the recorded content without listening to a useless silent state.
Further, since the useless silent area is incorporated in the free area, the area can be used for the recording operation at the next recording, and the capacity of the disk 1 can be effectively used.

In the processing of the embodiment shown in FIG. 2, the U-TOC is updated every time a silent area is found, but only the address as a silent area is searched during the level detection search for all recording areas. May be stored and the U-TOC may be collectively updated when the level detection search is completed.

[0056]

As described above, the recording apparatus of the present invention is detected by the silent area detecting means for detecting a silent area in the recorded area on the recording medium and the silent area detecting means. The silent area is provided with a control means capable of updating and controlling the management information so as to be managed as an unrecorded area on the recording medium, and detects the silent area by performing level detection on the recorded data after recording, This is managed as an unrecorded area. For this reason, even if a silent area occurs during recording, it is automatically deleted from the recording area, and such a silent area is not reproduced at the time of reproduction. Therefore, the user does not need to perform a troublesome operation such as fast-forward at the time of reproduction, and can effectively listen to the recorded content without listening to a useless silent state. In addition, by incorporating a useless silent area in the unrecorded area, the silent area can be used in the next recording, and the recording capacity of the recording medium can be effectively used.

[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 a process for an auto space delete operation according to the embodiment.

FIG. 3 is an explanatory diagram of an auto space delete operation according to the embodiment.

[Fig. 4] U before and after the auto space delete operation in the embodiment
It is explanatory drawing of a -TOC state.

FIG. 5 is U before and after the auto space delete operation in the embodiment.
It is explanatory drawing of a -TOC state.

FIG. 6 U-TOC sector 0 of the mini disk system
FIG.

FIG. 7: U-TOC sector 0 of the mini disk system
3 is an explanatory diagram of a link form of FIG.

[Explanation of symbols]

 1 disk 3 optical head 6a magnetic head 8 encoder / decoder section 8a level meter section 11 system controller

Claims (1)

[Claims] 1. A recording apparatus capable of recording audio information on a predetermined recording medium, in which a recorded area and an unrecorded area are managed by management information, wherein no sound is recorded in the recorded area on the recording medium. And a control for updating the management information so that the silent area detected by the silent area detecting means and the silent area detected by the silent area detecting means are managed as an unrecorded area on the recording medium. A recording device characterized by comprising means and.