JP3584551B2 - Recording apparatus, reproducing apparatus, recording method and reproducing method - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a recording apparatus applicable to a recording / reproducing system for performing recording / reproduction using a recording medium such as a magneto-optical disk.,Playback device, Recording method and reproducing methodIt is about.
[0002]
[Prior 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 for recording conferences and interviews.
[0003]
As a general consumer audio recording / reproducing system using a magneto-optical disk, a mini disk system has become widespread.
For example, in the case of the mini-disc system, a user TOC (hereinafter referred to as a U-TOC) is separately provided from main data such as music in order to manage an area on the disc where a user has recorded or an area where nothing has been recorded. Management information (referred to as TOC) is recorded, and the recording apparatus determines the recording area by referring to the U-TOC.
That is, the U-TOC manages each recorded song or the like in units of tracks, and describes its start address, end address, and the like. For an unrecorded area (free area) in which nothing is recorded, its start address, end address, and the like are described.
[0004]
For example, when attempting to record a certain song, the recording device checks the address of the free area on the disc from the U-TOC and records audio data there, or When performing overwrite recording while erasing a (track), the address of the track is confirmed and audio data is recorded there.
[0005]
[Problems to be solved by the invention]
By the way, in a generally used compact disc system, an address is recorded as a subcode together with audio data in the form of minutes / seconds / frames as a value equivalent to the reproduction time. Therefore, at the time of reproduction, the reproduction progress time or the like corresponding to the current reproduction position can be displayed as it is based on the value of the subcode.
[0006]
However, in the mini-disc system, the start address and the end address are managed as described above, and the audio data is compressed and recorded on the disc, so that the progress at the current position during reproduction or the like is performed. When it is desired to display the time, the remaining time, or the like, time information cannot be obtained directly from the reproduced data, so that a complicated calculation is required for displaying the time.
Further, in the mini-disc system, since one track may be recorded at a physically distant position on the disc or may not be recorded on the disc in the order of track number, various tracks at the current playback position may be used. The calculation of information may require extremely complicated calculations. In such a case, there is a problem that the calculation processing time for display is prolonged and time information cannot be displayed immediately.
[0007]
To facilitate the calculation of time information, a data table for calculation may be created at the time of reading the U-TOC. However, there is also a problem that usability deteriorates.
[0008]
In the mini-disc system, a user can arbitrarily record, and conversely, useless recording is often performed. For example, when a conference or the like is recorded, even if a silent state without any remarks continues, it is recorded as it is. As a result, in order to hear a necessary part at the time of reproduction, it is necessary to listen to a silent part or the like, which makes the operation troublesome.
[0009]
For example, as described above, in the mini disk system, there are some points that it is difficult to realize an operation suitable for use due to the management form by the U-TOC.
[0010]
[Means for Solving the Problems]
The present invention has been made in view of such a problem, and enables control data for realizing a more preferable operation to be recorded on a recording medium, so that usability at the time of reproduction or the like can be improved. The purpose is to do.
[0011]
Therefore, the input digital signal isWhile recording in the recording area on the recording medium, management information for managing the recording start address and the recording end address of the digital signal recorded in the recording area isIn a recording apparatus which blocks into predetermined length units and inserts linking data having a predetermined length between the blocks and records the linking data in a management area on the recording medium, a recording operation is performed based on the management information recorded in the management area. Control data generating means for generating control data that can be used, and the control data generated by the control data generating meansManagement areaRecording means for recording as linking data.
The digital signal is a compressed audio signal,The control data isReproduction time information for each part of the digital signal calculated from the recording start address and the recording end addressIt is.
Further, the digital signal is an audio signal, and the recording device further includes a silent part detecting means for detecting a silent part of the audio signal, and the control data is generated based on a detection result of the silent part detecting means. Address information to specify a silent area.
[0012]
Digital dataAnd management information for managing the recording start address and the recording end address of the digital data recorded in the recording area.Blocking into predetermined length unitsIsRecorded by inserting linking data having a predetermined length between the blocks.With management areaIn a reproducing apparatus for reproducing a recording medium, reproducing means for reproducing linking data and digital data recorded in the management area; extracting means for extracting control data included in the reproduced linking data; And control means for performing reproduction control based on the control data extracted by the extraction means when reproducing the recorded digital data.
[0013]
Further, while recording the input digital signal in a recording area on a recording medium, management information for managing the recording start address and recording end address of the digital signal recorded in the recording area is divided into blocks of a predetermined length, In a recording method in which linking data having a predetermined length is inserted between the blocks and recorded in a management area on the recording medium, control data that can be used during a reproducing operation based on management information recorded in the management area is provided. The control data is generated, and the generated control data is recorded as linking data of the management area.
Further, management information for managing a recording area in which digital data is recorded and a recording start address and a recording end address of the digital data recorded in the recording area are divided into predetermined length units, and a predetermined length is defined between the blocks. In a reproducing method for reproducing a recording medium including a management area recorded by inserting linking data consisting of: reproducing linking data recorded in the management area, and controlling the control data included in the reproduced linking data. When the digital data is extracted and recorded in the recording area, the reproduction control is performed based on the extracted control data.
[0014]
[Action]
Undefined area where information to be recorded is not specified(Linking data area)In this case, the recording device may arbitrarily record specific control data. Therefore, for example, time calculation data that can be used for calculating time for displaying time information during reproduction of a recording medium,Address information to specify the non-data area and data that changes the reproduction characteristicsBy recording such information and making it available at the time of reproduction, more effective operations can be executed using the recorded information.
[0015]
【Example】
Hereinafter, embodiments of the recording apparatus and the reproducing apparatus according to the present invention will be described.
This embodiment is a recording / reproducing apparatus using a magneto-optical disk (mini disk) as a recording medium.
The description will be made in the following order.
1. Configuration of recording / playback device
2. Cluster format
3. U-TOC sector
4. Example of management status for area on disk
5. Type of time information displayed during playback
6. Time calculation table
7. Processing when recording and reading U-TOC
8. Display time calculation based on time calculation table
9. Silence area table
10. Playback operation using silence area table
[0016]
1. Configuration of recording / playback device
FIG. 1 shows a block diagram of a main part of the recording / reproducing apparatus of the embodiment.
The magneto-optical disk 1 on which audio data is recorded is driven to rotate by a spindle motor 2. The magneto-optical disk 1 is irradiated with laser light by the optical head 3 during recording / reproduction.
[0017]
The optical head 3 performs high-level laser output for heating the recording track to the Curie temperature during recording, and performs relatively low-level laser output for detecting data from reflected light by the magnetic Kerr effect during reproduction. .
Therefore, the optical head 3 is equipped with a laser diode as a laser output unit, an optical system including a polarizing beam splitter and an objective lens, and a detector for detecting reflected light. The objective lens 3a is held by a biaxial mechanism 4 so as to be displaceable in a radial direction of the disk and in a direction of coming into contact with and separating from the disk.
[0018]
A magnetic head 6a is disposed 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 can be moved in the disk radial direction by the thread mechanism 5.
[0019]
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 calculates the reproduction RF signal, the tracking error signal TE, the focus error signal FE, and the groove information (absolute position information recorded as a pre-groove (wobbling groove) on the magneto-optical disk 1) by the arithmetic processing of the supplied information. GFM and the like are extracted.
The extracted reproduced RF signal is supplied to the encoder / decoder section 8. Further, 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.
[0020]
The servo circuit 9 receives various servo drive signals based on the supplied tracking error signal TE, focus error signal FE, track jump command and access command from the system controller 11 composed of a microcomputer, rotation speed detection information of the spindle motor 2 and the like. And controls the two-axis mechanism 4 and the sled mechanism 5 to perform focus and tracking control, and also controls the spindle motor 2 to a constant linear velocity (CLV).
[0021]
The address decoder 10 decodes the supplied groove information GFM to extract address information. This address information is supplied to the system controller 11 and used for various control operations.
The reproduced RF signal is subjected to EFM demodulation, decoding processing such as CIRC and the like in the encoder / decoder section 8. At this time, the address, subcode, etc. included in the reproduced RF signal are also extracted as data, and the system controller 11 Supplied.
[0022]
The audio data (sector data) decoded by the encoder / decoder unit 8 such as EFM demodulation and CIRC is temporarily written into 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 reproduced data in the system from the optical head 3 to the buffer memory 13 are intermittently performed at 1.41 Mbit / sec.
[0023]
The data written in the buffer memory 13 is read at a timing when the transfer of the reproduction data becomes 0.3 Mbit / sec, and is supplied to the encoder / decoder unit 14. Then, the signal is subjected to a reproduction signal process such as a decoding process for the audio compression process, converted into an analog signal by the D / A converter 15, supplied from the output terminal 16 to a predetermined amplifier circuit, and reproduced and output.
[0024]
When a 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, and then is converted into an encoder / decoder. The data is supplied to the unit 14 and subjected to audio compression encoding processing.
The recording data compressed by the encoder / decoder 14 is temporarily written into 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 out in predetermined data units and sent to the encoder / decoder unit 8. After being subjected to encoding processing such as CIRC encoding and EFM modulation by the encoder / decoder section 8, the encoded data is supplied to the magnetic head drive circuit 6.
[0025]
Then, the magnetic head drive circuit 6 supplies a magnetic head drive signal to the magnetic head 6a in accordance with 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 supplies a control signal to the optical head so as to output a recording level laser beam.
Through the buffer memory 13, the recording operation for the audio data continuously input is intermittently performed.
[0026]
The operation unit 19 is provided with various keys used for user operation. For example, a recording key, a play key, a stop key, an AMS key, a fast forward key, a fast reverse key, and the like are provided, and operation information thereof is supplied to the system controller 11.
The display unit 20 is configured by, for example, a liquid crystal display, and performs an operation of displaying an operation state, a track number, time information, and the like based on control of the system controller 11.
[0027]
Further, a functional part as a level meter part 8a is provided in the encoder / decoder part 8. The level meter section 8a can detect a level as a reproduced sound of data recorded on the disk 1 at the time of recording, and the level detection information is supplied to the system controller 11.
[0028]
When performing a recording / reproducing operation on the disk 1, it is necessary to read management information recorded on the disk 1, that is, P-TOC (pre-mastered TOC) and U-TOC (user TOC). The system controller 11 determines the address of the area to be recorded on the disk 1 and the address of the area to be reproduced on the disk 1 according to the management information. This management information is held in the buffer memory 13. For this reason, in the buffer memory 13, a buffer area for the recording data / reproduced data and an area for holding these management information are divided and set.
Then, the system controller 11 reads out the management information by executing the reproduction operation on the innermost peripheral side of the disk on which the management information is recorded when the disk 1 is loaded, and stores the information in the buffer memory 13. Thereafter, it can be referred to at the time of recording / reproducing operation on the disc 1.
[0029]
The U-TOC is edited and rewritten in accordance with recording or erasing of data. The system controller 11 performs this editing process every time a recording / erasing operation is performed, based on the U-TOC information stored in the buffer memory 13. And the U-TOC area of the disc 1 is rewritten at a predetermined timing in accordance with the rewriting operation.
[0030]
2. Cluster format
Here, a unit called a cluster will be described.
FIG. 2 shows a format of a cluster which is a unit of a recording operation in the mini disc system.
As a recording track in the mini disc system, clusters CL are continuously formed as shown in FIG. 2, and one cluster is a minimum unit for recording. One cluster corresponds to two or three tracks.
[0031]
One cluster CL is composed of a sector S_FC~ S_FFLinking area of 4 sectors and sector S₀₀~ S_1FAre formed from a main data area of 32 sectors. One sector is a data unit formed of 2352 bytes.
Normally, valid data is not recorded in the linking area of 4 sectors._FC, S_FD, S_FEIs an undefined area. This sector S_FC, S_FD, S_FEIs used, for example, for adjusting laser power during recording. In particular, since it is used for adjusting the laser power, even if some data is recorded, it may be destroyed. Therefore, the area is usually an area where data recording is not performed.
[0032]
Conversely, however, the sector S in the cluster where laser power adjustment is not performed_FC, S_FD, S_FEMay optionally record some data. In this embodiment, the sector S is used as described later._FC, S_FD, S_FEIs used to record control data such as a time calculation table and a silence area table.
Recording of TOC data, audio data, etc. is performed in 32 sectors (sector S₀₀~ S_1F) Is performed on the main data area.
The address is recorded for each sector.
[0033]
The sectors are further subdivided into units called sound groups, and two sectors are divided into 11 sound groups.
That is, as shown in FIG.₀₀Sector S and even sector₀₁The sound group SG is added to two consecutive sectors such as odd sectors.₀₀~ SG_0AIs included. One sound group is formed of 424 bytes, and has an audio data amount corresponding to a time of 11.61 msec.
In one sound group SG, data is recorded while being divided into an L channel and an R channel. For example, sound group SG₀₀Is composed of L channel data L0 and R channel data R0.₀₁Is composed of L channel data L1 and R channel data R1.
Note that 212 bytes, which is a data area of the L channel or the R channel, is called a sound frame.
[0034]
3. U-TOC sector
Next, a U-TOC (user TOC) sector will be described as management information for managing recording / reproducing operations of tracks (music and the like) on the disk 1.
As the TOC information, a U-TOC and a P-TOC are provided. The P-TOC is formed in the innermost pit area of the disk 1 and is read-only information. The P-TOC manages the position of a recordable area (recordable user area) of the disc, a lead-out area, a U-TOC area, and the like. In the mini-disc system, a read-only optical disk in which all data is recorded in a pit form can be used. However, in the case of a read-only optical disk, management of music recorded in ROM by the P-TOC is also performed. And no U-TOC is formed.
Detailed description of the P-TOC is omitted, and here, the U-TOC provided on the recordable magneto-optical disk will be described.
[0035]
FIG. 3 shows the format of U-TOC sector 0.
The U-TOC sector can be provided from sector 0 to sector 7, but sector 1 and sector 4 are character information, and sector 2 is an area for recording the recording date and time. Here, only the U-TOC sector 0 necessary for the recording / reproducing operation of the disk 1 will be described.
U-TOC sector 0 is a main data user management information about songs and new music recordable free area you record is recorded area.
For example, when attempting to record a certain music on the 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. At the time of reproduction, the area in which the music to be reproduced is recorded is determined from U-TOC sector 0, and the reproduction operation is performed by accessing the area.
[0036]
In the data area of U-TOC sector 0 (4 bytes × 588 2352 bytes), a synchronization pattern is formed in which a 1-byte data of all 0s or all 1s is arranged at the head position.
Subsequently, an address serving as a cluster address (Cluster H) (Cluster L) and an address serving as a sector address (Sector) and mode information (MODE) are added by 4 bytes, and the header is formed as described above.
Subsequently, at a predetermined byte position, a maker code, a model code, a track number of the first track (First TNO), a track number of the last track (Last TNO), a sector use status (Used sectors), a disk serial number, a disk ID, and the like. Is recorded.
[0037]
Furthermore, in order to identify a region (free area) or the like of a track (music or the like) recorded by the user by making it correspond to a management table unit described later, various table pointers (P -DFA, P-EMPTY, P-FRA, P-TNO1 to P-TNO255) are provided.
[0038]
Then, 255 parts tables from (01h) to (FFh) are provided as a management table unit corresponding to the table pointers (P-DFA to P-TNO255), and each part table has a certain part. A start address as a starting point, an end address as an end, and mode information (track mode) of the part are recorded. Furthermore, since the parts shown in each part table may be successively connected to other parts, link information indicating the part table in which the start address and the end address of the connected parts are recorded can be recorded. Have been.
In this specification, the numerical value with "h" is in a so-called hexadecimal notation. Further, a part refers to a track portion in which temporally continuous data is physically continuously recorded in one track.
[0039]
In this type of recording / reproducing apparatus, since the data of one music piece is physically discontinuous, that is, even if the data is recorded over a plurality of parts, the data is reproduced while accessing between the parts, so that the reproduction operation is not hindered. In some cases, a song or the like recorded by a user may be recorded in a plurality of parts for the purpose of efficient use of a recordable area.
[0040]
Therefore, link information is provided, and the part tables can be connected by designating the part tables to be connected by, for example, the numbers (01h) to (FFh) given to the respective part tables.
In other words, in the management table section in the U-TOC sector 0, one parts table represents one part. For example, for a music composed of three parts connected, three parts connected by link information The table manages the position of each part.
Note that the link information is actually indicated by a numerical value which is a byte position in the U-TOC sector 0 by a predetermined calculation process. That is, the part table is designated as 304+ (link information) × 8 (byte).
[0041]
The part tables from (01h) to (FFh) in the management table section of the U-TOC sector 0 are table pointers (P-DFA, P-EMPTY, P-FRA, P-TNO1 to P-TNO1 to P-TNO1) in the corresponding table instruction data section. -TNO255) indicates the contents of the part as follows.
[0042]
The table pointer P-DFA is attached to a defective area on the magneto-optical disk 1, and a head in one or more parts tables showing a track portion (= part) serving as a defective area due to a scratch or the like is shown. Parts table is specified. That is, when a defective part exists, any 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 part table. . If another defective part exists, another part table is designated as 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 set to "00h", for example, and there is no link thereafter.
[0043]
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 an unused part table exists, (01h) is set as the table pointer P-EMPTY. ) To (FFh) are recorded. When there are a plurality of unused part tables, the part tables are sequentially specified by the link information from the part table specified by the table pointer P-EMPTY, and all the unused part tables are connected on the management table part. Is done.
[0044]
The table pointer P-FRA indicates a writable free area (including an erased area) on the magneto-optical disk 1 and one or a plurality of parts indicating a track part (= part) serving as the free area. The first parts table in the table is specified. In other words, when a free area exists, any one of (01h) to (FFh) is recorded in the table pointer P-FRA, and the corresponding parts table is indicated by the start and end addresses in the corresponding parts table. Have been. In addition, when there are a plurality of such parts, that is, when there are a plurality of part tables, the link information sequentially designates the parts table whose link information is “00h”.
[0045]
FIG. 4 schematically shows the management state of parts that are free areas by using a parts table. This is because when the parts (03h), (18h), (1Fh), (2Bh), and (E3h) are set as free areas, this state is changed to the parts table (03h) (18h) (1Fh) following the corresponding table instruction data P-FRA. The state represented by the link (2Bh) (E3h) is shown. The above-described management of the defective area and the unused parts table is the same.
In the case of a magneto-optical disk on which no audio data such as music has been recorded and which has no defect, the parts table (01h) is designated by the table pointer P-FRA, and the recordable user of the disk is thereby designated. This indicates that the entire area is a free area. Since the remaining part tables (02h) to (FFh) are not used in this case, the part table (02h) is designated by the table pointer P-EMPTY, and the part table (02h) is not used. The parts table (03h) is specified as the link information.... In this case, the link information of the parts table (FFh) is set to “00h” indicating 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.
[0047]
The table pointers P-TNO1 to P-TNO255 indicate tracks such as tunes 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 on the first track are recorded. The part table in which the temporally leading part of the part is indicated.
For example, when the music set as the first track is recorded on the disk without dividing the track, that is, recorded as one part, the recording area of the first track is stored in the parts table indicated by the table pointer P-TNO1. It is recorded as a start and end address.
[0048]
Further, for example, when a music piece set as the second track is discretely recorded on a disc by a plurality of parts, each part is designated in a temporal order to indicate the recording position of the second track. That is, from the part table designated by the table pointer P-TNO2, another part table is sequentially designated by link information in a temporal order, and linked to a part table in which the link information is "00h" (the above-described part table). , Similar to FIG. 4).
In this way, for example, since all the parts on which the data constituting the second tune are recorded are sequentially specified and recorded, the data of the U-TOC sector 0 can be used when reproducing the second tune or recording the second tune. For example, when overwriting recording in a recorded area, the optical head 3 and the magnetic head 6 are accessed to take out continuous music information from discrete parts, and it is possible to perform recording using the recording area efficiently.
[0049]
As described above, for the rewritable magneto-optical disk 1, the area management on the disk is performed by the P-TOC, and the music and free areas recorded in the recordable user area are performed by the U-TOC.
[0050]
4. Example of management status for area on disk
An example of a management state of a track on the disk 1 by the U-TOC as described above will be described.
FIG. 5A schematically shows the disk 1 in the radial direction.
The innermost side is a lead-in area. Then, the P-TOC and the U-TOC are recorded here. U-TOC is recorded repeatedly and continuously for three clusters.
The recordable user area in which data such as music is actually recorded is an area from after the lead-in area to immediately before the outermost lead-out area.
For example, FIG. 5 shows a state in which six tracks (six songs) TK1 to TK6 are recorded in the recordable user area.
A in the figure₀  ~ A₁₉Indicates an address corresponding to a physical position on the disk.
[0052]
In this example, the track TK1 has five parts (TK1₍₁₎  , TK1₍₂₎  , TK1₍₃₎  , TK1₍₄₎  , TK1₍₅₎  ) And recorded discretely. Each of the tracks TK2 to TK6 is composed of one part. Further, in this case, the order from the disk inner peripheral side is not the track number order.
[0053]
Address A₀  ~ A₁₉Indicates the start address or end address of the parts of each of the tracks TK1 to TK6.
For example, address A₀  , Address A₁  Is the part TK1 of the truck TK1₍₁₎  Start address and end address.
Address A₂  , Address A₃  Are the start address and end address of the track TK2 (= part TK2).
[0054]
In this example, it is assumed that the entire area of the recordable user area has already been recorded, and that no free area remains.
[0055]
FIG. 6 shows an example of management of the tracks TK1 to TK6 by the U-TOC in this state.
The state of the U-TOC corresponding to the specific example of FIG. 5A, for example, a part table used for management, can be variously considered depending on the type of an editing operation and an updating algorithm before that. FIG. 6 is merely an example set for the purpose of explanation.
In FIG. 6, a portion where 1-byte data as a table pointer and link information in the U-TOC is set to "00h", and a portion where 3-byte data as a start address and an end address are set to "000000h". Is indicated by “−”.
[0056]
In the example of FIG. 5A, assuming that there is no defect in the recordable user area on the disk 1, the value of the table pointer P-DFA is "00h" as shown in FIG. Further, in FIG. 5A, since there is no free area, the value of the table pointer P-FRA is "00h" as shown in FIG.
The track TK1 has five parts (TK1₍₁₎  , TK1₍₂₎  , TK1₍₃₎  , TK1₍₄₎  , TK1₍₅₎  ) Is managed by five parts tables.
That is, for example, the part table (01h) is specified by the table pointer P-TNO1, and the part TK1 which is the temporally leading part in the part table (01h) is designated.₍₁₎  Start address A₀  And end address A₁  Is shown. Also, in the parts table (01h), the parts table (02h) is designated as link information, and in the parts table (02h), the part TK1 which is the second part in time.₍₂₎  Start address A₁₀And end address A₁₁Is shown.
[0058]
Further, the part tables (03h), (04h), and (05h) are sequentially linked, and the parts table (03h), (04h), and (05h) are used to link the parts TK1 and TK1, respectively.₍₃₎  , TK1₍₄₎  , TK1₍₅₎  Are indicated.
[0059]
Each of the tracks TK2 to TK6 is recorded as one part, and is therefore managed by one parts table.
For example, the track TK2 has its start address A in the (06h) parts table indicated by the table pointer P-TNO2.₂  And end address A₃  It is shown. The link information is "00h".
The track TK3 has its start address A in the parts table (07h) indicated by the table pointer P-TNO3.₈  And end address A₉  It is shown. The link information is “00h”.
Similarly, for the tracks TK4 to TK6, the start address and the end address are indicated by the parts tables (08h), (09h), and (0Ah) indicated by the table pointers P-TNO4 to P-TNO6, respectively.
[0060]
In this case, since the parts tables (0Bh) to (FFh) are not used, the table pointer P-EMPTY indicates the parts table (0Bh), and the parts table (0Bh) to the parts table (FFh) All unused parts tables up to are linked by link information.
[0061]
By being managed in this way, even if the tracks (parts) are physically separated from each other and recorded in a time-varying state as shown in FIG. Will be played back. That is, the tracks TK1, TK2,... TK6 are reproduced in the order of the track numbers, and the track TK1 including five parts is the part TK1.₍₁₎  , TK1₍₂₎  .... TK1₍₅₎  Are played in the order of
That is, when the reproduction operation is viewed in time, the reproduction is performed in the order shown in FIG. 7A, and in order to realize this, the system controller 11 moves the optical head 3 based on the U-TOC during reproduction in FIG. Data reading is executed while accessing as shown in b).
[0062]
In FIG. 5B, a solid line indicates a data reading operation by the optical head 3, and a broken line indicates an access operation of the optical head 3.
In the case where the tracks TK1 to TK6 are normally reproduced, the optical head 3 first receives the address A as shown in FIG.₀  ~ A₁  Area is reproduced, and then address A₁₀After accessing to address A₁₀~ A₁₁To play back.
Further, address A₄  Access to address A₅  Until the address A₁₄~ A_Fifteen, Address A₁₈~ A₁₉To play back. By the operation up to this point, the track TK1 has been reproduced. Thereafter, also for the tracks TK2 to TK6, the sound is reproduced in an appropriate temporal order by the reproduction operation indicated by the solid line and the access operation indicated by the broken line in FIG.
Referring to FIG. 5B and FIG. 6, it is understood that this reproducing operation is based on the U-TOC data of FIG.
[0063]
5. Type of time information displayed during playback
During the reproducing operation, the system controller 11 can display various time information on the display unit 20.
In the present embodiment, six types of time information to be displayed, for example, one-song reproduction progress time, all-song reproduction progress time, one-song remaining time, all-song remaining time, one-song reproduction time, and all-song reproduction time are possible. Shall be.
[0064]
The one-track playback progress time is a time indicating how many minutes and seconds from the beginning of the track the current playback location is during the playback of a certain track.
For example, in FIG.₁  As shown by the part TK1₍₅₎  In the case where the audio read from the middle of the track TK1 is currently output as the playback audio, the playback progress time of one song is, as indicated by {circle around (1)} in FIG. 7B, the current position (PB) from the beginning of the track TK1.₁  ).
Also, in FIG.₂  As shown in FIG. 7, when the audio read from the middle of the track TK2 is currently output as the reproduced audio, the playback progress time of one song is changed to the track TK2 as shown by (5) in FIG. From the beginning of the current position (PB₂  ).
[0065]
The all-song reproduction progress time is a time indicating how many minutes and seconds from the head of the disc (that is, the head of the track TK1) the current reproduction position is during reproduction. Therefore, during the reproduction of the track TK1, it coincides with the one-track reproduction progress time. That is, the current playback location is PB₁  In the case of, the playback progress time of all songs is the time indicated by (1) in FIG. 7 (b). In addition, the time after the track TK2 is the time from the beginning of the track TK1 to the current playback position.₂  In the case of, the reproduction progress time of all songs is the time indicated by (6) in FIG. 7 (c).
[0066]
One song remaining time is a time indicating how many minutes from the current playback position to the end of the track during playback of a certain track.
Therefore, the current playback location is PB₁  , The remaining time for one song is the time indicated by (2) in FIG. 7 (b). Also, the current playback location is PB₂  In the case of, the remaining time of one music is the time indicated by {circle around (7)} in FIG. 7 (c).
[0067]
The remaining time of all songs is a time indicating minutes and seconds from the current playback position to the end of playback of the disc.
Therefore, the current playback location is PB₁  In the case of, the total music remaining time is the time indicated by (4) in FIG. 7 (b). Also, the current playback location is PB₂  In the case of, the total music remaining time is the time indicated by (9) in FIG. 7 (c).
[0068]
One song playback time is the total playback time (ie, song length) for a certain track. Therefore, the current playback location is PB₁  In the case where the track TK1 is being played back, the displayed one-song playback time is the time indicated by (3) in FIG. 7 (b). Also, the current playback location is PB₂  In the case where the track TK2 is being played back, the displayed one-song playback time is the time indicated by (8) in FIG. 7 (c).
[0069]
The total music reproduction time is the total reproduction time when the disc is reproduced from the first track to the last track. Therefore, during the reproduction of the disc shown in FIG. 5A, the displayed time of the whole music is the time shown in FIG. 7D.
[0070]
These pieces of time information are continuously displayed during playback or displayed on the display unit 20 in response to a user's operation of the display mode. That is, it is necessary to perform a process of quickly calculating and displaying any of the above six types of time information.
[0071]
However, the actual track data on the disk 1 is recorded in a discrete state as viewed in time sequence as shown in FIG. 5 (a). Therefore, at the time of reproduction, the current address is converted to the current time axis. The upper position cannot be calculated.
In addition, particularly when the track is divided into many parts such as the track TK1, the calculation requires extremely complicated processing.
[0072]
For example, the playback location is PB₁  When trying to calculate the one-track reproduction progress time indicated by (1) at the time of (1), first, the part TK1₍₁₎  ~ TK1₍₄₎  You have to get the time length of each. That is, the start address is subtracted from the end address of each part to obtain the address length of the part, which is converted into time.
And again PB₁  TK1 from the address at₍₅₎  Is subtracted to obtain the address length of the part, and this is converted into time.
And parts TK1₍₁₎  ~ TK1₍₄₎  TK1 and the part TK1₍₅₎  PB from start address of₁  By adding the time length up to the address in the above, the one-track reproduction progress time (1) can be finally calculated.
[0073]
If such a complicated calculation is required and it takes a long time for the calculation, it may not be possible to display it in some cases, which is inappropriate.
Therefore, in this embodiment, a time calculation table is created from the U-TOC data as described below, and is written in the linking area of the disk. Then, at the time of reproduction, various time information can be easily calculated using the time calculation table read from the linking area.
[0074]
6. Time calculation table
The time calculation table created in this embodiment includes the part table numbers (01h) (02h)... In FIG. 8 and the time value TM shown as the calculation result in the figure._A  , TM_B  .. Is a data table corresponding to.
When the disk 1 is loaded and the U-TOC is read, the system controller 11 sets a time value TM corresponding to the parts table used for track management._A  , TM_B  .. Are calculated and a time calculation table is created.
[0075]
When tracks TK1 to TK6 are recorded on the disk 1 as shown in FIG. 5A and managed as shown in FIG. 6, the part tables used for track management are the part tables (01h) to (01h). 0Ah).
When the track is formed of one part, the calculated time value is the time length of that part.
For example, as for the parts tables (06h) to (0Ah) corresponding to the tracks TK2 to TK6, as shown in FIG. 8, the start address is subtracted from the end address to obtain the address length, which is converted into a time length. Time value TM_F  ~ TM_J  Get.
[0076]
When the track is formed of a plurality of parts, the accumulated time length up to the end of each part is defined as a time value.
Therefore, regarding the track TK1, first, the part TK1₍₁₎  Is the end address A₁  Start address A₁  Is converted to a time length to obtain a time value TM._A  And
[0077]
Parts TK1₍₂₎  For the end address A₁₁Start address A₁₀Is converted to a time length, and the converted value and the part TK1₍₁₎  Time value TM_A  Is added to the time value TM_B  And
Parts TK1₍₃₎  For the end address A₅  Start address A₄  Is converted to a time length, and the converted value and the part TK1₍₁₎  ~ TK1₍₂₎  Time value TM that is the length of time until_B  Is added to the time value TM_C  And
Parts TK1₍₄₎  , TK1₍₅₎  Similarly, the time length from the start of the track to the end of the part is calculated and the time value TM is calculated._D  , TM_E  Get.
[0078]
As described above, the time value TM as the time length shown in FIG._A  ~ TM_J  Is calculated, and this time value TM_A  ~ TM_J  Are created for each of the parts tables (01h) to (0Ah).
[0079]
Note that the time value TM_A  ~ TM_J  Is calculated, the process of converting the address length into the time length can be executed as follows.
As described with reference to FIG. 2, the playback time of one sound group (one sector = 11 sound groups) is 11.61 msec, which is
512 / (44.1 × 1000)
It is required in.
This is because the minidisc system handles 512 samples of data at a sampling frequency of 44.1 KHz as one sound group.
[0080]
Considering the playback time of one sector, one sector is equivalent to 5.5 sound groups,
｛512 / (44.1 × 1000)｝ × 5.5
It becomes. Since data is recorded in 32 sectors in one cluster of 36 sectors, the reproduction time of one cluster is
｛512 / (44.1 × 1000)｝ 5.5 × 32
It becomes.
Therefore, assuming that the value obtained as the address length is X cluster + Y sector, the time length becomes
{(X × 32) + Y} × 512 / (44.1 × 1000)
Is required.
[0082]
7. Processing when recording and reading U-TOC
The time calculation table created as described above is written to a certain linking area of the disc 1 at the time of U-TOC writing.
FIG. 10 shows the processing of the system controller 11 when recording the U-TOC.
[0083]
When the disc 1 is loaded for the first time, the system controller 11 reads the U-TOC and creates a time calculation table based on the U-TOC. Write at the same time.
That is, at the time of U-TOC writing, first, the optical head 3 and the magnetic head 6a are made to access the U-TOC area of the disk 1 (F101), the laser power is adjusted to a high level in the first linking area, and writing is performed. Start.
[0084]
First, the sector S in the first cluster to be the U-TOC area₀₀The data in U-TOC sector 0 is transferred as recording data at the write timing for, and is recorded by the magnetic head 6a. In this example, if U-TOC sector 0, sector 1 and sector 2 are used, sector S₀₁The data of the U-TOC sector 1 is transferred as recording data at the write timing for₀₂Then, the data of the U-TOC sector 2 is transferred as recording data at the write timing for, and writing is performed respectively (F103, F104, F105, F106).
Then, the sector S₀₃~ S_1FNo writing is performed at the timing until_FC~ S_FEWhen the write timing is reached, the control data, that is, the data as the time calculation table created in this case is transferred as recording data and recorded on the disk 1 (F103, F107).
[0086]
Since the U-TOC is recorded continuously for three clusters, the process from step F103 is repeated until the end of three clusters is determined in step F108, and the process ends when writing for three clusters is completed.
By such processing, the sector S included in the U-TOC area is_FC~ S_FESector S not used for adjusting the laser power_FC~ S_FEMeans that the time calculation table has been recorded.
[0087]
After the time calculation table is recorded in this manner, the time calculation table is also read at the timing of reading the U-TOC from the disk 1. FIG. 11 shows the processing at the time of reading the U-TOC.
[0088]
When reading the U-TOC, the system controller 11 first causes the optical head 3 to access the U-TOC area of the disk 1 (F201), and starts reading (F202).
Then, the sector S in the cluster serving as the U-TOC area₀₀The data of U-TOC sector 0 is fetched into buffer memory 13 at the read timing for₀₁The data of the U-TOC sector 1 is read at the read timing for₀₂The data of the U-TOC sector 2 is fetched into the buffer memory 13 at the read timing with respect to (F203, F204, F205, F206).
[0089]
And sector S₀₃~ S_1FNo reading is performed at the timing until_FC~ S_FEWhen the read timing is reached, the data read at that time is read into the RAM or the like in the system controller 11 as previously recorded control data. That is, in this case, the data as the time calculation table previously created for the disk 1 is read (F203, F207).
Then, when the reading of all data and control data as U-TOC is completed, the processing is ended from step F208.
[0090]
By such processing, the system controller 11 performs the sector S included in the U-TOC area during the reproduction operation or the like._FC~ S_FERead the time calculation table recorded in. When it is required to display the time information on the display unit 20 while the reproduction is in progress or at the time of stop, the time to be displayed is calculated using the time calculation table.
[0091]
8. Display time calculation based on time calculation table
The time value TM corresponding to the parts (01h) to (0Ah) as shown in FIG. 8 for the disk 1 of FIG._A  ~ TM_J  12 to 16 show a method of calculating time information to be displayed when the time calculation table formed by the above is used. In each drawing, the address Ax indicates the address of the current playback position.
[0092]
FIG. 12 shows a method for calculating the playback progress time of one song.
Current address Ax is part TK1₍₁₎  If it is within, the part TK1 indicated in the parts table (01h) from the current address Ax₍₁₎  Start address A₀  May be converted into a time length.
[0093]
Current address Ax is part TK1₍₂₎  If it is, the part TK1 from the current address Ax₍₂₎  Start address A₁₀Is converted to a time length, and the part TK1₍₁₎  Time value TM stored corresponding to_A  May be added.
Current address Ax is part TK1₍₃₎  If it is, the part TK1 from the current address Ax₍₃₎  Start address A₄  Is converted to a time length, and the part TK1₍₁₎  , TK1₍₂₎  Time value TM stored as the time length obtained by adding_B  May be added.
[0094]
Current address Ax is part TK1₍₄₎  If it is, the part TK1 from the current address Ax₍₄₎  Start address A₁₄Is converted to a time length, and the part TK1₍₁₎  , TK1₍₂₎  , TK1₍₃₎  Time value TM stored as the time length obtained by adding_C  May be added.
Current address Ax is part TK1₍₅₎  If it is, the part TK1 from the current address Ax₍₅₎  Start address A₁₈Is converted to a time length, and the part TK1₍₁₎  , TK1₍₂₎  , TK1₍₃₎  , TK1₍₄₎  Time value TM stored as the time length obtained by adding_D  May be added.
[0095]
If the current address Ax is one of the tracks TK2 to TK6, the address length obtained by subtracting the start address of the track from the current address Ax may be converted into the time length as shown in the figure.
[0096]
As described above, in the track TK1 including a large number of parts, the calculation of the playback progress time of one music has to be complicated. However, in the present embodiment, the value in the time calculation table is used. It can be calculated by a simple calculation.
[0097]
FIG. 13 shows a method of calculating the total music reproduction progress time.
Note that when the current address Ax is within the track TK1, the all-track playback progress time and the one-track playback progress time are the same, and the calculation process during playback of the track TK1 is the same as in FIG.
[0098]
When the current address Ax is within the track TK2, the start address A of the track TK2 is changed from the current address Ax.₂  Is converted to a time length, and a time value TM stored as the time length of the track TK1 is calculated._E  May be added.
When the current address Ax is within the track TK3, the start address A of the track TK3 is changed from the current address Ax.₈  Is converted to a time length, and the time value TM stored as the time length of the tracks TK1 and TK2 is calculated._E  , TM_F  May be added.
[0099]
Similarly, when the current address Ax is within the tracks TK4 to TK6, the address length obtained by subtracting the start address of the track from the current address Ax is converted into a time length, and The time value stored as the time length of each track may be added.
[0100]
As described above, the calculation processing of the total music reproduction time is also a very simple calculation using the values in the time calculation table.
[0101]
The method for calculating the remaining time for one song is as shown in FIG.
Current address Ax is part TK1₍₁₎  If it is, the part TK1 from the current address Ax₍₁₎  Start address A₀  Is converted to a time length, and the value is converted to a time value TM which is the time length of the track TK1._E  What is necessary is to subtract from.
[0102]
Current address Ax is part TK1₍₂₎  If it is, the part TK1 from the current address Ax₍₂₎  Start address A₁₀Is converted to a time length, and the converted value and the part TK1₍₁₎  Time value TM which is the time length of_A  Is the time value TM which is the time length of the track TK1._E  What is necessary is to subtract from.
[0103]
Current address Ax is part TK1₍₃₎  If it is, the part TK1 from the current address Ax₍₃₎  Start address A₄  Is converted to a time length, and the converted value and the part TK1₍₁₎  ~ TK1₍₂₎  Time value TM which is the time length of_B  Is the time value TM which is the time length of the track TK1._E  What is necessary is to subtract from.
[0104]
Current address Ax is part TK1₍₄₎  And the current address Ax is the part TK1₍₅₎  In the case of 曲, the remaining time for one song can be calculated by the calculation method shown in the same manner.
[0105]
If the current address Ax is one of the tracks TK2 to TK6, the address length obtained by subtracting the start address of the track from the current address Ax is converted into a time length as shown in FIG. Time value (TM_F  ~ TM_J  )).
[0106]
The method of calculating the total music remaining time is as shown in FIG.
In this case, it is only necessary to add the time value stored as the time length of each track after the current track to the one-track remaining time obtained as shown in FIG.
[0107]
That is, when the current address Ax is within the track TK1, the time value (TM) of each of the tracks TK2 to TK6 is added to the remaining time of one track calculated as described with reference to FIG._F  , TM_G  , TM_H  , TM_I  , TM_J  ) Is added.
If the current address Ax is within the track TK2, the time value (TM) of each of the tracks TK3 to TK6 is added to the remaining time of one track of the track TK2 calculated as described with reference to FIG._G  , TM_H  , TM_I  , TM_J  ) Is added.
[0108]
When the current address Ax is within the tracks TK3 to TK5, similarly, it is only necessary to add the time value stored as the time length of each track after the track to the remaining time of one track of the track.
Note that for the last track, the track TK6, the remaining time of one music and the remaining time of all music have the same value, and the calculation method is the same.
[0109]
The playback time of one song is obtained as shown in FIG.
That is, this corresponds to the time value TM for each of the tracks TK1 to TK6._E  , TM_F  , TM_G  , TM_H  , TM_I  , TM_J  Is stored as it is as one music reproduction time, so that the arithmetic processing becomes unnecessary.
The reproduction time of all the songs is as shown in FIG. 16B, and the time value TM which is the reproduction time of each of the tracks TK1 to TK6._E  , TM_F  , TM_G  , TM_H  , TM_I  , TM_J  May be added.
[0110]
As described above, various types of time information can be calculated using the time calculation table. In particular, in this case, any calculation is performed using the number of parts tables (i.e., At most one address value is searched from the TOC. Therefore, the access processing to the U-TOC data at the time of calculation is at most one time, and other than the current address Ax which is read in real time, the values stored in the time calculation table are the values required for the calculation. It is.
This can greatly speed up the calculation, for example, you will not be able to keep up with the display
[0111]
9. Silence area table
The operation described above is an example in which a time calculation table is created as control data and recorded in the linking area. Next, an operation example in which a silence area table is created as control data and recorded in the linking area. explain.
[0112]
For example, when recording a meeting or the like, if there is a prolonged time during which no speech is made in the middle of the recording, a silent region where there is no meaningful voice due to only a minute noise or the like occurs on the recorded disk or the like.
When a silence area occurs in such a recording area, in the case of reproduction, the reproduction is continued as it is even if it becomes a silence part, and the speech is reproduced or it is frustrating to wait. Requires manual fast-forwarding and other operations, which is very inconvenient for listening during playback.
[0113]
Therefore, in the recording / reproducing apparatus of the present embodiment, for example, when recording a sound such as a conference, the system controller 11 monitors the level information on the recording data detected by the level meter unit 8a, for example, as shown in FIG. A silence area table indicating a silence start address and a silence end address is created.
[0114]
For example, the system controller 11 compares the sound level information supplied from the level meter unit 8a corresponding to the recording data with a predetermined threshold value, and determines whether or not a silent state has occurred. When the silent state continues for a predetermined time, for example, 5 seconds, the recording position address of the data at that point on the disk is stored as the silent start address. When a level higher than the threshold value is obtained from the period in which the silent state has been reached, it is determined that the silent state has ended, and the recording position address of the data at that time is stored as the silent end address.
By such an operation, at the end of the recording, for example, a silent region table as shown in FIG. 17 can be generated.
[0115]
Now, it is assumed that audio data of a conference or the like is recorded, and audio data is recorded on the disk 1 as shown in FIG.
Here, it is assumed that the recording from the start of recording to the end of recording of the conference was recorded as one track (track TK1).
If the hatched portion in the figure is silent, the first and last addresses of the hatched area are shown in the silent area table of FIG.
[0116]
The silence area table generated in this manner stores the sector S on the disk 1 by the processing described with reference to FIG. 10 at the time of writing the U-TOC._FC~ S_FETo record.
When reading the U-TOC at the time of reproduction, as shown in FIG._FC~ S_FEBy reading the data recorded in the silent region table, the silent region table is fetched.
[0117]
10. Playback operation using silence area table
FIG. 19 shows an example of a reproduction operation process by the system controller 11 using such a silent region table. That is, when the reproduction is started (F301), the current address read together with the data is compared with the silence start address stored in the silence area table (F303).
[0118]
If the current address matches any of the silence start addresses stored in the silence area table, the optical head 3 is accessed to the silence end address stored in the silence area table corresponding to the silence start address (F304). Then, the reproduction is restarted from the next address (F305).
This process is repeated until the reproduction ends (F302).
[0119]
Thus, the reproducing operation is as shown in FIG. That is, normal reproduction is performed as indicated by a solid line in an area where sound is recorded, but reproduction is skipped by an access operation as indicated by a broken line in a silent area.
By such a reproducing operation, necessary reproduction can be completed in a short time without performing useless reproduction, and it becomes very convenient for a listening operation.
[0120]
As described above, in the present embodiment, when the system controller 11 generates the control data such as the time calculation table and the silence area table, the control data is recorded in the linking area of the disc, and the control read out from the linking area at the time of reproduction. High-performance processing can be realized using data.
Of course, the time calculation table and the silence area table may be other than the above-described embodiment. For example, as a time calculation table, a time length may be stored corresponding to all parts, or a table combining an accumulated time length, an accumulated remaining time length, and the like may be generated.
[0121]
Various control data can be considered in addition to the time calculation table and the silent region table. For example, in the cluster of the audio data recording area as well as the U-TOC area, the volume level data of the main data sector is recorded in the linking sector, and is read out simultaneously with the audio data at the time of reproduction and used for level display. Is also conceivable.
If a sound effect processing circuit is installed, equalizing characteristics, reverb, echo, and other acoustic characteristics set during recording are recorded in the linking area, and the state of the characteristics is automatically changed during playback. A processing method such as setting is also conceivable.
[0122]
Further, in the embodiment, an example in which the present invention is applied to a mini disc system is described. However, the present invention can be widely applied to a recording / reproducing system employing a format having an undefined area.
[0123]
【The invention's effect】
As described above, the present invention creates control data that can be used for predetermined operation control during reproduction of a recording medium, and transfers the created control data to an undefined area of the recording medium.(Linking data area)To be recorded. Then, by performing operation processing using the control data at the time of reproduction, various operations can be performed, and there is an effect that the performance as a recording / reproducing system can be improved.
In particular, by using the time calculation data that can be used for calculating time for displaying time information when reproducing the recording medium as control data, various time information can be calculated without delay during reproduction, and display delays are prevented. Is done.
If the control data is address information for specifying a non-data area such as silence data, reproduction processing and display processing can be performed in accordance with the audio level, and if the control data is data that changes the reproduction characteristics, audio data can be obtained. Effect processing can be automated.
[Brief description of the drawings]
FIG. 1 is a block diagram of a recording / reproducing apparatus according to an embodiment of the present invention.
FIG. 2 is an explanatory diagram of a mini disk cluster format.
FIG. 3 is an explanatory diagram of a U-TOC sector 0 of the mini disc.
FIG. 4 is an explanatory diagram of a link form of a U-TOC sector 0 of a mini disc.
FIG. 5 is an explanatory diagram of an example of a track recording state on a mini-disc.
FIG. 6 is an explanatory diagram of an example of a management state by U-TOC.
FIG. 7 is an explanatory diagram of time information displayed in the embodiment.
FIG. 8 is an explanatory diagram of a time calculation table in the embodiment.
FIG. 9 is an explanatory diagram of a time value of a time calculation table in the embodiment.
FIG. 10 is a flowchart of a process at the time of U-TOC writing according to the embodiment.
FIG. 11 is a flowchart of a process at the time of U-TOC reading according to the embodiment.
FIG. 12 is an explanatory diagram of a calculation process of one song reproduction progress time in the embodiment.
FIG. 13 is an explanatory diagram of a calculation process of an all-track playback progress time in the embodiment.
FIG. 14 is an explanatory diagram of a calculation process of one music remaining time in the embodiment.
FIG. 15 is an explanatory diagram of a calculation process of a total music remaining time in the embodiment.
FIG. 16 is an explanatory diagram of a calculation process of one music reproduction time and all music reproduction time in the embodiment.
FIG. 17 is an explanatory diagram of a silent area table in the embodiment.
FIG. 18 is an explanatory diagram of a reproducing operation using the silent area table according to the embodiment.
FIG. 19 is an explanatory diagram of reproduction operation control using a silent region table according to the embodiment.
[Explanation of symbols]
1 disk
3 Optical head
6a magnetic head
8 Encoder / decoder part
8a Level meter section
11 System controller
12 Memory controller
13 buffer memory
14 Encoder / decoder part
19 Operation section
20 Display

Claims (14)

The input digital signal is recorded in a recording area on a recording medium, and management information for managing a recording start address and a recording end address of the digital signal recorded in the recording area is divided into predetermined length units. A recording device for inserting linking data having a predetermined length therebetween and recording the data in a management area on the recording medium,
Control data generating means for generating control data that can be used during a reproducing operation based on the management information recorded in the management area,
Recording means for recording the control data generated by the control data generation means as linking data of the management area ;
A recording device comprising: The digital signal is a compressed audio signal, and the control data is reproduction time information for each part of the digital signal calculated from the recording start address and the recording end address. The recording device according to the above. The digital signal is an audio signal,
The recording apparatus further includes a silent part detecting unit that detects a silent part of the audio signal,
2. The recording apparatus according to claim 1, wherein the control data is address information for specifying a silent area, which is generated based on a detection result of the silent part detecting means. A recording area in which digital data is recorded, and management information for managing a recording start address and a recording end address of digital data recorded in the recording area are divided into predetermined length units, and a predetermined length is formed between the blocks. In a reproducing apparatus for reproducing a recording medium including a management area in which linking data is inserted and recorded,
Reproducing means for reproducing linking data and digital data recorded in the management area;
Extracting means for extracting control data included in the reproduced linking data,
Control means for performing reproduction control based on the control data extracted by the extraction means when reproducing the digital data recorded in the recording area,
A playback device comprising: 5. The reproducing apparatus according to claim 4, wherein the digital data is compressed audio data, and the control data is a reproduction time of each part of the compressed audio data. 6. The reproducing apparatus according to claim 5, wherein the control means accumulates the reproduction time of each part and controls the display of the reproduction time of the currently reproduced part. The digital data is audio data, the control data is address information for specifying a silence area, and the control means controls the reproduction means so as not to reproduce the silence area based on the control data. The reproducing apparatus according to claim 4, wherein the reproducing apparatus controls the reproduction. The input digital signal is recorded in a recording area on a recording medium, and management information for managing a recording start address and a recording end address of the digital signal recorded in the recording area is divided into predetermined length units, In a recording method of inserting linking data having a predetermined length between and recording the data in a management area on the recording medium,
Generate control data that can be used during a playback operation based on the management information recorded in the management area,
Recording the generated control data as linking data of the management area
A recording method, characterized in that: The digital signal is a compressed audio signal,
    9. The recording method according to claim 8, wherein the control data is reproduction time information for each part of the digital signal calculated from the recording start address and the recording end address. The digital signal is an audio signal,
    The control data specifies a silent region of the audio data recorded on the recording medium. 9. The recording method according to claim 8, wherein the recording information is address information for specifying. A recording area in which digital data is recorded, and management information for managing a recording start address and a recording end address of digital data recorded in the recording area are divided into predetermined length units, and a predetermined length is formed between the blocks. In a reproducing method for reproducing a recording medium including a management area in which linking data is inserted and recorded,
Play the linking data recorded in the management area,
The control data included in the reproduced linking data is extracted,
When reproducing digital data recorded in the recording area, reproduction control is performed based on the extracted control data.
A reproduction method characterized by the above-mentioned. 12. The reproduction method according to claim 11, wherein the digital data is compressed audio data, and the control data is a reproduction time for each part of the compressed audio data. 13. The reproduction method according to claim 12, wherein the reproduction time of each part is accumulated to display and control the reproduction time of the currently reproduced part. The digital data is audio data, and the control data is address information for specifying a silent data area,
The reproduction method according to claim 11, wherein reproduction control of the audio data is performed based on the control data so as not to reproduce the silent data area.

Images