JPH10199211A - Editing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and surely erase a silent block at a starting portion of a track by searching a silent data block from a starting position of the track to determine a starting position of a sounded data block and allowing a renewal operation of management information to be performed so that the starting position of the sounded block becomes a starting position of a reproduction operation of the track. SOLUTION: When a silent block is to be erased, a user selects a track #1 and set an edit mode to be a silent erasure mode. Then, a system controller first determines the range of the silent block at a starting portion of the track #1. Assuming that a block having addresses A0 -A20 is detected as the silent block, the system controller renews U-TOC so that the silent block is treated as if being deleted from the track #1. Thus, the U-TOC is renewed so that the track #1 is managed as a portion from a starting address A21 to an end address A1 .

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording medium such as a magneto-optical disk in which audio data is recorded in track units and management information for managing recording / reproducing operations of the audio data is recorded. And an editing apparatus for editing recorded audio data by updating the management information.

[0002]

2. Description of the Related Art Various recording media and recording / reproducing apparatuses corresponding to the recording media have been developed. In particular, recently, as known as a mini-disc system, a type in which a user can freely record music data and the like has become popular. ing.

[0003] For example, in the case of this mini-disc system, an area on the disc where a user has recorded (data recorded area) or an area in which nothing has been recorded yet (data-recordable unrecorded area; hereinafter, free area) In order to manage the area, management information called user TOC (hereinafter, referred to as U-TOC) is recorded separately from main data such as music. And the recording device is this U-TOC
And the playback device determines the area to be played back by referring to the U-TOC.

[0004] That is, the U-TOC manages each recorded music or the like in data units called tracks, and records its start address, end address, and the like. In addition, the start address, the end address, and the like of a free area in which nothing is recorded are described as areas that can be used for future data recording.

Further, by managing the area on the disk by such a U-TOC, it is possible to edit recorded data such as music only by updating the U-TOC. For example, a divide function for dividing one track into a plurality of tracks, a combine function for linking a plurality of tracks to one track, a move function for changing a given track number according to the order of tracks to be played, and an unnecessary track. Editing processing such as a delete function for deleting (also called an erase function) can be performed easily and quickly. By utilizing such a function, the user can edit one or a plurality of tracks once recorded on the disc, and can create and enjoy a personal original disc.

[0006] In addition to various types of playback modes, various playback modes are provided in addition to simply playing back recorded tracks in order. For example, in a mini-disc system, the playback device includes a program playback mode, a shuffle playback mode, a multi-access playback mode, and the like, in addition to a continuous playback mode in which normal playback operations are performed in track number order.

The program playback mode is a mode in which the user sets the track order (music order) arbitrarily and the playback is performed in that order. The shuffle reproduction mode is a mode in which a track number is randomly selected by, for example, an operation of generating a random number in the reproduction apparatus, and the selected track is reproduced. The multi-access playback mode is also called, for example, “punch-out playback”, and is a mode in which a playback sound can be immediately output for a specific track in response to a playback operation. Here, "immediately" refers to the timing excluding the time required for starting up and accessing the optical head required for normal track playback operation, and the playback sound is generated almost simultaneously with the playback operation. What is output.

[0008]

By the way, for example, when recording a certain song, there is a delay before the recording of the voice as the actual song is started rather than the timing of the recording operation. There were many. In particular, when performing a manual recording start operation, it is difficult to accurately grasp the start timing of the sound on the source side input to the recording device.
A silence period of about 2 seconds to about 5 seconds or more in some cases occurs. Of course, playing such a recorded track would require waiting a few seconds for the song to begin. This is not a major problem for general recreational use, but it can be used for business purposes such as broadcasting and theaters, especially when audio / music playback timing is strictly required. The generation of a silent section of several seconds at the beginning is a serious inconvenience.

In the mini disc system, in order to eliminate such a silent section at the beginning of the track, an editing process for deleting the section may be performed. Since the conventional editing process, that is, the U-TOC updating process is basically performed on a track basis, the editing operation becomes complicated and there is a practical inconvenience.

FIG. 12 shows an operation procedure for deleting a part of a track. Track # as shown in FIG.
Consider a disk on which three songs, # 1, # 2 and # 3, are recorded. This figure is an image diagram in which the data recording area of the disk is taken out in the radial direction and is shown in a band shape. # 1,
.. Correspond to the track numbers assigned to the respective tracks in the order of reproduction. In this specification,
As for the tracks recorded on the disc, the first to n-th tracks are referred to as “Track #” as described above.
1 "to" track #n ". In some cases, the track number is simply expressed as “# 2”.

Suppose that there is a silent section of several seconds at the head of track # 2 in the disk of FIG. 12A, as indicated by the hatched portion in FIG. 12B. At this time, the user wants to set track # 2 to only a sound section in which sound is actually recorded, and to start music or the like without waiting for useless silence periods at the start of reproduction of track # 2. I do.

In this case, first, as shown in FIG. 12C, divide editing is performed at a boundary point between a silent section and a sound section to divide track # 2 into two tracks # 2 and # 3. At this time, the previous track # 3 is moved down and managed as track # 4.

Next, as shown in FIG. 12 (d), an erasing process is performed on a silent section which is track # 2 at this time. That is, track # 2 (silent section) is incorporated into the free area. Track # accordingly
Tracks # 3 and # 4 are moved up and managed as tracks # 2 and # 3.

At this point, the silent section at the head of track # 2, which existed at the time of FIG. 12A, has been eliminated. However, the necessity of such a complicated editing operation every time a silent section occurs at the beginning of a track imposes a great burden on the user, which is a problem. Also, in the editing operation, a point at which the user becomes a boundary between an actual silence section and a sound section (that is, FIG. 12C)
Finding the exact divide point is actually a difficult task. In addition, it is particularly difficult to properly designate and erase a section of about several seconds.

[0015]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-described problems, and is intended to enable simple and accurate editing when a silent section at the head of a track is to be deleted. The purpose is to enhance the editing function.

For this reason, as an editing device, a sound head discriminating means for discriminating a silent data section from a head position of a certain track and a head position of a sound data section, and a sound head discriminating means. Management information updating means capable of executing an operation of updating management information is provided so that the sound head position can be set as a start position of a reproduction operation for the track. That is, for example, when a user performs an editing operation by specifying a track number (although it is not always necessary to specify the track number), a silent section at the beginning of the track is automatically searched and the section is deleted. (Hereinafter referred to as silent erase).

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the editing apparatus according to the present invention will be described below. An example of this embodiment is a recording / reproducing apparatus using a magneto-optical disk (mini disk) as a recording medium and having a function as an editing apparatus. The description will be made in the following order. <1. Configuration of recording / reproducing device><2. Cluster format><3. U-TOC sector><4. Example of management by U-TOC><5. Silent erase processing>

<1. Configuration of Recording / Reproducing Apparatus> First, the configuration of a mini-disc recording / reproducing apparatus will be described with reference to FIGS. FIG. 1 shows an example of the appearance of a recording / reproducing apparatus.
A display unit 20 such as a liquid crystal display device is formed on a front panel of the recording / reproducing apparatus. The display section 20 shows the operation state of the recording / reproducing disc, the track number, the recording time / reproduction time, the editing operation state, the reproduction mode, and the like. Furthermore, in the mini-disc system, character information can be recorded on the disk, and display of input characters when the character information is input, display of character information read from the disk, and the like are executed.

The power key 33 is used to turn on / off the power of the recording / reproducing apparatus.
Provided for off operation. A disc is inserted into the recording / reproducing device on the front panel, and an eject key 3
A disc insertion section 22 is provided in which the disc is removed in accordance with the operation of Step 4.

The front panel is provided with various operation means for operations relating to recording / reproduction. That is,
A reproduction key 24, a pause key 23, a stop key 25, a recording key 26, an AMS operation dial 27 (hereinafter referred to as a jog dial) for executing a heading access operation, a search key 28 for executing a high-speed reproduction operation, and the like are provided.
These are basic operation keys related to a so-called audio recording / reproducing operation. The jog dial 27 is an operation unit for instructing AMS (head search) by rotating the jog dial 27. In the character input mode (disc name input mode or track name input mode) which is one of the edit (edit) modes, the jog dial 27 is operated. , The rotation operation of the jog dial 27 is an increment / decrement operation for character selection.

In the case of this embodiment, in particular, when there is a silent data section at the head of a track, a function called a silent erase which erases only that part is provided as one of the edit modes. In the silent erase mode, the rotation operation of the jog dial 27 may be used for an operation of selecting a track to be edited.

The jog dial 27 can be pressed, and this pressing operation functions as an enter operation in a disc name input mode, a track name input mode, a program setting mode, a multi-access setting mode, or the like. Further, the pressing operation of the jog dial 26 may also serve as the reproducing operation similarly to the operation of the reproducing key 24.

Along with these operating means, numeral keys 39
Is provided. The number keys 39 are provided with, for example, a "1" key to a "25" key and a ">25" key for inputting a number of 26 or more. The numeric key 39 can be used for directly selecting a track number to be reproduced or for selecting a track number in a program reproduction mode or a multi-access reproduction mode.

As keys for operating the edit mode, an edit key 29, a yes key 30, and a cancel key 31 are provided. The edit key 29 is used for calling and ending various edit modes.
A yes key 30 and a cancel key 31 are used for operations during editing. For example, the yes key 30 is used as an enter operation, and the cancel key 31 is used as a cancel operation.

The edit mode includes a track name input mode for inputting characters such as a song name for each track, a disc name input mode for inputting characters such as a name for a disc, and erasing registered character information. There are a name erase mode, a divide mode in which one track is divided into a plurality of tracks, a combine mode in which a plurality of tracks are connected to one track, an erase mode in which tracks are erased, and the silent erase mode described above.

Keys for operating the playback mode include:
A continuous playback key 35, a program key 36, a shuffle key 37, and a multi-access key 38 are provided. By operating these keys, the playback mode is set to one of the continuous playback mode, the program playback mode, the shuffle playback mode, and the multi-access playback mode.

In this embodiment, these operating means are arranged on the front panel of the recording / reproducing apparatus for the sake of explanation. For example, the recording / reproducing apparatus can be operated by a remote commander using infrared rays or the like. May be provided.

The internal configuration of the mini disk recording / reproducing apparatus as shown in FIG. 1 will be described with reference to FIG. The magneto-optical disk 1 on which audio data is recorded is driven to rotate by a spindle motor 2. Then, recording / writing on the magneto-optical disk 1 is performed.
At the time of reproduction, a laser beam is irradiated by the optical head 3.

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. Perform output. 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 2
It is held by a shaft mechanism 4 so as to be displaceable in the radial direction of the disk and in the direction of coming into contact with and separating 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 can be moved in the disk radial direction by the thread 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 performs an arithmetic operation on 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 disk 1) 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.

The servo circuit 9 is provided with the supplied tracking error signal TE and focus error signal FE and the system controller 1 composed of a microcomputer.
Various servo drive signals are generated based on a track jump command, an access command, rotation speed detection information of the spindle motor 2 and the like from the controller 1 to control the two-axis mechanism 4 and the sled mechanism 5 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 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 decoding processing such as EFM demodulation and CIRC in the encoder / decoder section 8. At this time, addresses, subcode data, and the like are also extracted and supplied to the system controller 11.

EFM demodulation in the encoder / decoder section 8
The decoded audio data (sector data) such as CIRC is temporarily written into the buffer memory 13 by the memory controller 12. Reading of data from the disk 1 by the optical head 3 and transfer of reproduced data in the system from the optical head 3 to the buffer memory 13 are at 1.41 Mbit / sec, and are usually performed intermittently.
Note that the encoder / decoder unit 8 includes a level meter unit 8a.
And detects the volume level LM of the audio data read from the disk 1 and the audio data to be recorded on the disk 1, and supplies the volume level LM to the system controller 11.

The data written in the buffer memory 13 is read out at a timing when the transfer of the reproduction data becomes 0.3 Mbit / sec, and is supplied to the encoder / decoder section 14. Then, subjected to reproduction signal processing of the decoding processing and the like for the audio compression processing, 44.1KH _Z sampling, 1
This is a 6-bit quantized digital audio signal. The digital audio signal is subjected to adjustment processing such as equalizing, reverb, and gain in a digital signal processing circuit 21, converted into an analog signal by a D / A converter 15, and supplied from an output terminal 16 to a predetermined amplifier circuit section. It is reproduced and output. For example, they are output as L, R analog audio signals.

The digital signal processing circuit is a so-called DSP
(Digital signal processor), etc., and can perform various various processes. For example, in addition to equalizing processing in sound settings in various modes, processing such as fade-in and fade-out can be performed by gradually changing the gain (output volume level). In addition,
Such a processing unit may be provided at a stage subsequent to the D / A converter 15, and may be performed by analog processing.

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. Encoder / decoder unit 1
4 and subjected to audio compression encoding processing. Although not shown, it is of course possible to provide a digital interface unit to input and output digital audio data.

The recording data compressed by the encoder / decoder section 14 is temporarily written into the buffer memory 13 by the memory controller 12, read out at a predetermined timing, and sent to the encoder / decoder section 8. After being subjected to encoding processing such as CIRC encoding and EFM modulation in the encoder / decoder section 8, 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 in accordance with the encoded recording data. That is, the application of the N or S magnetic field to the magneto-optical disk 1 by the magnetic head 6a is performed. At this time, the system controller 11 supplies a control signal to the optical head so as to output a laser beam at a recording level.

The operation section 19 indicates a portion to be operated by a user, and corresponds to various operation keys and dials as described with reference to FIG. Operation information from these operation keys and dials is supplied to the system controller 11, and the system controller 11 executes operation control according to the operation information. The display unit 20 is provided on a housing as shown in FIG. 1, and this display operation is controlled by the system controller 11. The system controller 11 is a microcomputer including a CPU, a program ROM, a work RAM, an interface unit, and the like.

By the way, when performing a recording / reproducing operation on the disk 1, management information recorded on the disk 1, that is, P-TOC (pre-mastered TOC), U-
It is necessary to read out the 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 according to the management information. This management information is held in the buffer memory 13. Then, when the disk 1 is loaded, the system controller 11 reads out the information by executing a reproduction operation on the innermost peripheral side of the disk on which the management information is recorded, and stores the information in the buffer memory 13. Thereafter, it can be referred to at the time of recording / reproducing / editing operation for the disc 1.

The U-TOC is rewritten in accordance with data recording and various editing processes, but the system controller 11 performs the U-TOC every time a recording / editing operation is performed.
C update processing is performed by the U-TO stored in the buffer memory 13.
This is performed on the C information, and the U-TOC area of the disc 1 is also rewritten at a predetermined timing in accordance with the rewriting operation.

<2. Cluster Format> Here, a unit called a cluster will be described. FIG. 3 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 formed continuously as shown in FIG. 3, and one cluster is the minimum unit for recording. One cluster corresponds to two or three tracks.

One cluster CL is composed of sectors S _FC and
And 4 sector linking area that are S _FF, is formed from a main data area of 32 sectors indicated as sectors S ₀₀ to S _1F. One sector is a data unit formed of 2352 bytes. 4 sectors sectors S _FC to S _FF is used in such as a recording or linking area of the sub-data, TOC data, recording such audio data is performed in the main data area of 32 sectors. The address is recorded for each sector.

The sectors are further subdivided into units called sound groups, and two sectors are divided into 11 sound groups. That is, as shown, and the even sector such as sector S _00, the two sectors of consecutive odd sectors such as sector S _01, in a state that contains the sound group SG ₀₀ to SG _0A. One sound group is formed of 424 bytes,
The amount of audio data is equivalent to 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 SG ₀₀ is composed of L channel data L0 and R channel data R0, also sound group SG ₀₁
Is 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.

<3. U-TOC Sector> As described above, when performing a recording / reproducing operation on the disk 1, the system controller 11 uses the P-TOC, U-TOC (user TOC) as management information recorded on the disk 1. ) And refer to this.
Here, as the management information for managing the recording / reproducing operation of the track (music and the like) on the disk 1, UT
The OC sector will be described.

The TOC information includes U-TOC and P-
Although the TOC is provided, this P-TOC is formed in the innermost pit area of the disk 1 and is read-only information. And the recordable area of the disc by P-TOC (recordable user area)
And management of positions such as a lead-out area and a U-TOC area. 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 disk, management of music recorded in ROM by the P-TOC is also performed. UT
No OC 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.

FIG. 4 shows the format of U-TOC sector 0. Note that the U-TOC sector can be provided from sector 0 to sector 31.
Among them, sector 1 and sector 4 are character information, and sector 2 is an area for recording the recording date and time, as described later. First, the U-TOC sector 0 which is always required for the recording / reproducing operation of the disk 1 will be described.

The U-TOC sector 0 is a data area in which management information is mainly recorded on music recorded by the user and a free area in which new music can be recorded. For example, when recording a certain music on the disk 1, the system controller 11
A free area on the disk is searched for from sector 0, and audio data is recorded 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.

The data area of U-TOC sector 0 (4 bytes × 588, 2352 bytes) has all 0s at the beginning position.
Alternatively, a synchronization pattern in which all 1-byte data are formed side by side is recorded. Then the cluster address (Clust
er H) (Cluster L) and an address to be a sector address (Sector) and mode information (MODE) are added by 4 bytes,
This is the header. A sector is a 2
This is a data unit of 352 bytes, and 36 sectors constitute one cluster. The synchronization pattern and the address are not limited to the U-TOC sector 0, but are also recorded in the P-TOC sector and the data sector in which audio data is actually recorded in units of the sector.

Subsequently, a maker code, a model code, and a track number (F
irst TNO), track number of last track (Last T
NO), data such as sector usage (Used sectors), disk serial number, and disk ID are recorded.

Further, in order to identify the area of the track (music or the like) or the free area recorded by the user by making it correspond to a management table section to be described later, various tables are used as a correspondence table instruction data section. Pointers (P-DFA, P-EMPTY, P-FRA, P-TNO1 to P-TN
O255) is recorded.

The table pointers (P-DFA to P-TNO25)
5) (01h)
There are provided 255 parts tables from (FFh) to (FFh). In each of the parts tables, a start address serving as a starting point, an end address serving as an end, and mode information (track mode) of the part are recorded. ing. In addition, since the parts indicated 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. The start address and the end address are each 3 bytes. The cluster address (Cluster H) is used as the address value in sector units.
(Cluster L) and 3 bytes of sector address (Sector). The start address and end address are 2 bytes cluster address value, 1 byte sector address value, and 1 byte sound group value. Is compressed to 3 bytes for recording.

In the present specification, numerical values with "h" are in so-called hexadecimal notation. Further, a part refers to a track portion in which temporally continuous data is physically continuously recorded in one track.

In this type of recording / reproducing apparatus, even if data of one music is physically discontinuous, that is, even if it is recorded over a plurality of parts, it is reproduced while accessing between parts, so that the reproducing operation is hindered. Therefore, the music or the like recorded by the user may be recorded in a plurality of parts for the purpose of efficient use of the recordable area.

Therefore, link information is provided, and the part tables can be connected by specifying the part tables to be connected, for example, by 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 position of the part is managed by the table. 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 arithmetic processing. That is, the part 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 is a table pointer (P-DF) in the corresponding table instruction data section.
A, P-EMPTY, P-FRA, P-TNO1 ~ P-TNO255)
The contents of the part are shown as follows.

The table pointer P-DFA is shown for a defective area on the magneto-optical disk 1, and is a single part table or a plurality of parts tables indicating a track portion (= part) serving as a defective area due to a scratch or the like. The first part table in the box is specified. In other words, if there is a defective part, (01h) to
Either (FFh) is recorded, and the corresponding parts table indicates the defective part by the start and end addresses. 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, for example, "(0
0h)]], and there is no link thereafter.

The table pointer P-EMPTY indicates the first part table of one or a plurality of unused parts tables in the management table section. If there is an unused parts table, the table pointer P-EMPTY is set as the table pointer P-EMPTY. , (01h) to (FFh) are recorded.
If there are multiple unused part tables, the part table specified by the table pointer P-EMPTY is sequentially specified by link information, and all unused part tables are connected on the management table section Is done.

The table pointer P-FRA indicates a free area (including an erasure area) on which data can be written on the magneto-optical disk 1, and a track 1 (= part) indicating a track part (= part) serving as a free area is indicated. The first part table in multiple parts tables is specified. That is,
Table pointer P-FRA if free area exists
, Any one of (01h) to (FFh) is recorded.
In the corresponding parts table, parts as free areas are indicated by start and end addresses. Also, if there are a plurality of such parts, that is, if there are a plurality of parts tables,
The link information is sequentially specified up to the parts table where "(00h)" is displayed.

FIG. 5 schematically shows the management state of parts that are free areas by using a parts table. This is because when the part (03h) (18h) (1Fh) (2Bh) (E3h) is set as a free area, this state follows the table pointer P-FRA and the parts table (03h) (18h) (1Fh) (2Bh) ) (E3h) indicates the state represented by the link. The above-described management of the defective area and the unused parts table is the same.

By the way, if it is a magneto-optical disk in which audio data such as music is not recorded at all and has no defect,
Parts table (01h) by table pointer P-FRA
This indicates that the entire recordable user area of the disc is a free area. In this case, since the remaining part tables (02h) to (FFh) are not used, the part table (02h) is designated by the above-mentioned table pointer P-EMPTY, and the part table (02h) is not used. The parts table (03h) is specified as link information, and so on, so that 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
As 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.

The table pointers P-TNO1 to P-TNO255 indicate tracks such as songs recorded on the magneto-optical disk 1 by the user.
In P-TNO1, a parts table indicating a temporally leading part of one or a plurality of parts on which data of the first track is recorded is designated. For example, the track set 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 a start and end address in the parts table indicated by the table pointer P-TNO1.

For example, when the music set as the second track is discretely recorded on a plurality of parts on the disc, each part is designated in time order to indicate the recording position of the second track. Is done. In other words, from the part table specified by the table pointer P-TNO2, another part table is sequentially specified by the link information according to the temporal order, and linked to the part table in which the link information is "(00h)". (Same form as above, FIG. 5). In this way, for example, since all the parts on which the data constituting the second tune are recorded are sequentially designated and recorded, the data of the U-TOC sector 0 can be used to reproduce the second tune or the second tune. When performing overwrite recording on the area, it is possible to access the optical head 3 and the magnetic head 6 to extract continuous music information from discrete parts, and to perform recording using the recording area efficiently.

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 area recorded in the recordable user area are performed by the U-TOC. It is.

Next, FIG. 6 shows the format of the U-TOC sector 1. The sector 1 is used as a data area for recording input character information when a track name or a disc title is given to each recorded track.

In this U-TOC sector 1, slot pointers P-TNA1 to P-TNA255 are prepared as a character slot indication data portion corresponding to each recorded track, and the slot pointers P-TNA1 to P-TNA255 are provided. Are prepared as slots (01h) to (FFh) in units of 8 bytes and 255 units, and manages character data in substantially the same manner as the U-TOC sector 0 described above.

In the slots (01h) to (FFh), character information as a disc title or a track name is recorded in ASCII code. The 8 bytes before the slot (01h) are a dedicated area for the disc name. And
For example, a character specified by the user corresponding to the first track is recorded in the slot specified by the slot pointer P-TNA1. Further, by linking the slots by the link information, the character input corresponding to one track can be handled even if it is larger than 7 bytes (7 characters). In this U-TOC sector 1, the slot pointer P-EMPTY manages an unused parts table.

Next, FIG. 7 shows a format of the U-TOC sector 2, and this sector 2 is a data area for mainly recording the recording date and time of the music piece recorded by the user.

In the U-TOC sector 2, slot pointers P-TRD1 to P-TRD255 are prepared as date and time slot indication data portions corresponding to each recorded music, and the slot pointers P-TRD1 to P-TRD255 are provided. A date and time slot part specified by is provided. In the date / time slot part, slots (01h) to (FFh) are formed in units of 8 bytes and 255 units are used to manage date / time data in substantially the same manner as the U-TOC sector 0 described above.

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

For example, when a song is recorded as the first song on a disc, the recording date and time, the maker code and model code of the recording device are recorded in the slot specified by the slot pointer P-TRD1. The recording date and time data is automatically recorded by the system controller 11 with reference to the internal clock 11a.

In this U-TOC sector 2, the slot pointer P-EMPTY manages unused slots. For unused slots, link information is recorded in place of the model code, and each unused slot is managed by linking with the link information starting from the slot pointer P-EMPTY.

The U-TOC sector 4 is a data area for recording input character information when a user gives a song name or a disc title to a song recorded by the user, similarly to the sector 1 described above. The format is almost the same as that of FIG. However,
In this sector, code data corresponding to Chinese characters and European characters are recorded. In addition to the data of sector 1 in FIG. 6, the attribute of a character code used as a character code is recorded at a predetermined byte position. The management of the character information of the U-TOC sector 4 is performed by using the slot pointers P-TNA1 to P-TNA1 to
This is carried out by 255 units of slots (01h) to (FFh) specified by P-TNA255 and slot pointers P-TNA1 to P-TNA255.

<4. Example of management by U-TOC>
The area structure of the magneto-optical disk 1 will be described, and P-TOC,
An example of a recording state managed by the U-TOC will be described. FIG.
(A) schematically shows the area structure of the disk 1 in the radial direction. In the case of a magneto-optical disk, an area in which data is recorded by embossed pits as roughly shown as a pit area in FIG. 8A, and a groove in which a so-called magneto-optical area is provided. Divided into areas.

Here, P-TOC is repeatedly recorded as a pit area. In this P-TOC,
-The TOC position is the U-TOC start address UST _A
And the readout start address L
O _A , recordable user area start address R
Addresses at the respective positions shown in FIG. 8A, such as ST _A and power calibration area start address PC _A , are shown.

[0077] While the groove area following the pit area at the innermost peripheral side of the magneto-optical disc 1 is formed, to the address indicated as the read-out start address LO _A in P-TOC out of the groove area The area is a recordable area that can be recorded, and is hereinafter referred to as a lead-out area. Furthermore Of the recordable area, actually recordable user area in which data such as music is recorded, from the recordable user area start address RST _A, the up position immediately before the lead-out start address LO _A.

[0078] Then, the area to be pre-recordable user area start address RST _A within the groove area is a management area for recording and reproducing operations, U-TOC as described above is recorded, also power calibration area start One cluster from the position indicated by the address PC _A is provided as a laser power calibration area. The U-TOC is located in the management area for the recording / reproducing operation.
Start address UST position from the 3 clusters shown in _A (1 cluster = 36 sectors) are continuously recorded.

The actual audio data is recorded in the recordable user area, for example, as shown in FIG. This example shows a case where four tracks (songs) # 1 to # 4 are recorded. First, addresses A0 to A
1 is recorded as track # 1 as the first music piece, and track # 2 as the second music piece is recorded at address A2
.., And the second half part # 2-2 recorded at addresses A6 to A7. Track # 3 is recorded on the parts at addresses A4 to A5, and track # 4 is recorded on the parts at addresses A8 to A9. In this state,
The free area F1 in which no music is recorded is a part with addresses A10 to A11.

The U-TO managing the state shown in FIG.
FIG. 9 shows an example of data in the C sector 0. Note that FIG.
, The portion where 1-byte data as a table pointer or link information in the U-TOC is set to “00h”, and 3 as a start address and an end address.
The portion where the byte data is "000000h" is indicated by "-". The corresponding parts / tracks are shown on the right side of each parts table. Further, it is assumed that there is no defect in the recordable user area on the magneto-optical disk 1, so that the table pointer P-DFA is set to "00h".

In the recording state shown in FIG. 8A, the table pointer P-FRA manages the free area. For example, in this case, if the table pointer P-FRA indicates the parts table (06h), Correspondingly, the parts table (06h) shows information on the parts that become the free area F1 in FIG. 8A. That is, the address A10 is shown as a start address, and the address A11 is shown as an end address. In this case, since there are no other free area parts, the link information of the parts table (06h) is set to "00h".

The track # 1 has its start address A0 and end address A1 in the (01h) parts table indicated by the table pointer P-TNO1.
Is shown. Since track # 1 is recorded as one part, the link information of the parts table (01h) is set to "00h".

The start address A2 and the end address A3 of the track # 2 are indicated in the (02h) parts table indicated by the table pointer P-TNO2. However, track # 2 has two parts (#
2-1 and # 2-2), and the address A2 and the address A3 only indicate the part # 2-1 in the first half of the track # 2. Therefore, for example, a part table (04h) is shown as link information of the parts table (02h), and a start address A6 and an end address A7 are recorded in the parts table (04h) to indicate parts of the second half part # 2-2. Have been. Since no link is required thereafter, the parts table (04
The link information of h) is “00h”.

The parts positions of the tracks # 3 and # 4 are managed by part tables obtained from the table pointers P-TNO3 and P-TNO4, respectively. Since only four songs have been recorded, the table pointers P-TNO5 to P-TNO255 are not used and are set to "00h". A table pointer P-EMPTY indicating an unused parts table indicates the parts table (07h) in this case, and all unused parts tables from the parts table (07h) to the parts table (FFh) are displayed. Linked by link information.

<5. Silent erase processing> U as described above
Although various editing operations can be performed by updating the TOC data, in this example, by implementing an editing process called silent erasing, if there is a silent section at the beginning of a track, the editing operation can be simplified. Realization.

The editing mode called silent erase will be described with reference to FIGS. 8B and 8C and FIG. FIG. 8 above
FIG. 8B shows an enlarged view of track # 1 in the recording state of FIG. This track # 1
It is assumed that the hatched section at the beginning is a silent section where no sound such as music is actually recorded.

In order to erase the silent section, in this example, the user designates track # 1 and performs an operation of changing the edit mode to the silent erase mode. Then, the system controller 11 first determines the range of the silent section at the beginning of the track # 1. For example, it is assumed that a section of addresses A0 to A20 is detected as a silent section. Then, the system controller 11
Updates the U-TOC so that this silent section is deleted from track # 1.

That is, as shown in FIG.
1 is from the start address A21 to the end address A1
(That is, the start address is updated from A0 to A21), and the silent section from address A0 to A20 is a free area F2.
So that

As an example, the U-TOC sector 0 which has been managed according to the data example as shown in FIG.
Is updated as shown in FIG. 10, whereby the state shown in FIG. 8C is realized. Note that the hatched portions in FIG. 10 indicate portions updated from the state in FIG.

That is, by updating the start address of the track # 1 from the address A0 to the address A21, the track # 1 is updated.
For 1, the deletion of the silent section is realized. Since two free areas F1 and F2 are generated as free areas, for example, a part table (07h) is designated by link information in the parts table (06h) that manages the free area F1 in FIG. . In the parts table (07h), the start address “A0” and the end address “A20” as a newly generated free area F2 (that is, a silent section) are described, and the link information is “00h”. Further, with the new use of the part table (07h), the value of the table pointer P-EMPTY is updated to "08h",
The part tables (08h) to (FFh) are managed as unused part tables.

In this example, since such a silent erase process is performed, even if an undesired silent section occurs at the head of the track, the complicated editing work as described in FIG. This can be solved. In addition, when editing is performed as shown in FIG.
The character information and date / time information (information of the U-TOC sector 1, sector 2, sector 4, etc.) managed in association with the track # 2 in the state of (b) are at the time of the divide in FIG. Since it is attached to the front track (that is, track # 2 in FIG. 12C), FIG.
Will be erased along with the track when erasing.
Therefore, at the time of FIG. 12D, the character information and the like attached to the track # 2 of FIG. 12A is lost in the track # 2. However, according to the silent erase process of the present example, there is also an advantage that the track number does not move, so that the accompanying character information and the like are kept attached to the track.

The silent section targeted for the silent erase does not necessarily have to be incorporated in the free area.
For example, the trash area (U
-Area not managed by TOC).

FIG. 11 shows the processing of the system controller 11 in the silent erase mode. When the user operates the edit key 29 to set the silent erase mode, the system controller 11 starts the processing in FIG. First, in step F101, the track number of the track targeted for silent erase is set as a variable X. This track number is the track number specified by the user.

Subsequently, in step F102, the track #X
The optical head 3 is made to access the start address, and the reading of the audio data is started from step F103. In step F104, the level of the read audio data is sequentially monitored together with the reading of the audio data in step F103. That is, the volume level information LM on the read audio data is sequentially supplied from the level meter section 8a to the system controller 11, but the system controller 11 performs an operation of comparing the volume level information LM with a predetermined value THL. . The predetermined value THL is a threshold value for determining whether or not a sound is determined, and is a value set by an initial setting. The audio data read from the disk 1 may or may not be actually reproduced and output to the user as audio.

When the data reading ends the silent section and reaches the sound section, that is, the beginning of the music, a positive result is obtained in step F104, and the process proceeds to step F105. Then, the system controller 11 fetches the decoded address Ad accompanying the read data at the head portion of the sound section, and holds the decoded address Ad as the variable Y. Then, in step F106, the reading of the audio data from the disk 1 is completed, and in step F107, the U-TOC sector 0 is updated. In this updating process, the start address of the parts table indicated by the table pointer P-TNO (X) corresponding to the track #X is rewritten to the address value held as the variable Y, and the silent section is incorporated in the free area. That is, the update as illustrated in FIG. 10 is performed.

The U-TOC is first updated with respect to the U-TOC data read into the buffer memory 13, and then the updated U-TOC data is transferred to the encoder / decoder 8 as recording data. And written (updated) in the U-TOC area of the disk 1.
Will be.

In the process of FIG. 11, the silent erase process is executed for the track specified by the user. For example, by executing the silent erase mode, the silent interval of all the tracks is reduced. It is also conceivable to search for the presence / absence (whether or not there is a silent section of a predetermined length or more at the head of the track) and automatically execute the silent erase on the existing track. Such an operation is a very convenient function for the user when, for example, it is desired to execute silent erase on all tracks on the disk 1.

In the above example, the U-TOC sector 0 is updated by the process in the silent erase mode. However, another U-TOC sector may be prepared to reflect the silent erase process. . For example, there may be a case where the user wants to reproduce and output music or the like without waiting for a silent part by a silent erase process, but wants to save an original recording state (a management state of the U-TOC sector 0). is there.

If the U-TOC sector 0 is rewritten, it is not possible to return to the state before the editing, and if it is desired to retain the original state, a management data format similar to that of the U-TOC sector 0 is used. Have UT
Prepare an OC sector. For example, let this be a U-TOC sector 20. Then, while maintaining the management state as shown in FIG. 9 in the U-TOC sector 0, the U-TOC sector 20 performs rewriting according to the silent erase process as shown in FIG.

In a normal reproducing operation, a reproducing operation including a silent section is performed in accordance with U-TOC sector 0. A mode for omitting a silent section is prepared as a reproducing mode, and the reproduction is executed in the reproducing mode. In such a case, it may be considered that the reproduction is performed with reference to the U-TOC sector 20. That is, the user can execute a reproduction operation that does not need to wait for a silent section as necessary, and can maintain the original recording state and management state.

In the embodiment, an example in which the present invention is applied to a mini-disc system has been described. However, the present invention records time-continuous data such as audio data and video data and records the data. It can be realized as an editing device for various recording medium systems in which management information for managing the / reproduction operation is recorded.

[0102]

As described above, the editing apparatus of the present invention searches for a silent data section from the start position of a track to determine the start position of a sound data section. The update operation of the management information can be executed so that it can be set as the start position of the reproduction operation related to, so that the user does not need to perform a complicated and difficult editing operation to erase the silent section, thereby simplifying the operation. In addition, there is an effect that a silent section at the head of the track can be accurately deleted. As a result, a suitable reproduction is realized even when a so-called sound output timing is strictly required.

The management information is updated with respect to a management information unit (for example, U-TOC sector 0) including at least information on the reproduction start position and reproduction end position of each track in the management information of the recording medium. The update operation of rewriting the information of the start position may be performed. However, in another management information unit such as the U-TOC sector 20 in the above example, the sound head position determined by the sound head determination unit is set to the An update operation of recording as information on the reproduction start position of the track may be performed. In this case, there is an advantage that in a specific case, a reproduction operation in which a silence period is limited can be performed while the original management state is maintained.

[Brief description of the drawings]

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

FIG. 2 is a block diagram of a recording / reproducing apparatus according to the embodiment.

FIG. 3 is an explanatory diagram of a mini disk cluster format.

FIG. 4 is an explanatory diagram of U-TOC sector 0 of a mini disc.

FIG. 5 is an explanatory diagram of a link form of a U-TOC sector 0 of a mini disc.

FIG. 6 is an explanatory diagram of a U-TOC sector 1 of the mini disc.

FIG. 7 is an explanatory diagram of a U-TOC sector 2 of the mini disc.

FIG. 8 is an explanatory diagram of a silent erase process according to the embodiment;

FIG. 9 is an explanatory diagram of a management example of U-TOC sector 0 according to the embodiment.

FIG. 10 shows a U-TO after a silent erase process according to the embodiment.
FIG. 14 is an explanatory diagram of a management example of C sector 0.

FIG. 11 is a flowchart of processing in a silent erase mode according to the embodiment;

FIG. 12 is an explanatory diagram of a conventional editing procedure for deleting a silent section.

[Explanation of symbols]

1 disk, 3 optical heads, 6a magnetic head, 8
Encoder / decoder section, 8a level meter section, 1
1 system controller, 12 memory controller, 13 buffer memory, 14 encoder / decoder section, 19 operation section, 20 display section, 27 jog dial, 29 edit key, 31 yes key

Claims (3)

[Claims] 1. A recording medium in which audio data is recorded in track units and management information for managing data recording / reproducing operations in track units is recorded.
A sound head discriminating means for discriminating a silence data section from a head position of a certain track and discriminating a head position of a sound data section as an editing device capable of executing at least management information updating processing; Management information updating means capable of executing management information updating operation such that the sound head position determined by the means can be set as a start position of a reproduction operation for the track. Editing device that features. 2. The management information updating means rewrites information on a reproduction start position in a management information unit including at least information on a reproduction start position and a reproduction end position of each track in management information of a recording medium. The editing device according to claim 1, wherein the editing device performs an update operation. 3. The management information updating means does not update the first management information unit including at least information on a reproduction start position and a reproduction end position of each track in the management information of the recording medium. In the second management information unit capable of recording substantially the same type of information as the one management information unit, the sound start position determined by the sound start determination means is used as information of the reproduction start position for the track. The editing apparatus according to claim 1, wherein an updating operation for recording is performed.