JP3541785B2 - Recording / reproducing apparatus and recording / reproducing method - Google Patents

Description

[0001]
[Industrial applications]
According to the present invention, for example, recording or reproduction of audio data or the like can be performed on a recording medium on which management information for managing the unrecorded area and the recorded area can be discretely present. The present invention relates to a recording / reproducing apparatus and a recording / reproducing method that can be performed.
[0002]
[Prior art]
2. Description of the Related Art Data rewritable disk media on which a user can record music data and the like are known. In such a disk medium, a data area for managing an area in which data such as music has already been recorded and an unrecorded area are managed. (User TOC, hereinafter referred to as U-TOC) is provided, and this management data is rewritten each time an operation such as recording, editing, or erasing is completed.
[0003]
For example, when attempting to record a certain song, the recording device searches an unrecorded area on the disc from the U-TOC, and records audio data there. In the reproducing apparatus, the area in which the music (track) to be reproduced is recorded is determined from the U-TOC, and the reproduction operation is performed by accessing the area.
[0004]
[Problems to be solved by the invention]
By the way, as a recording device for such a disc, when recording a new music or the like, an area that is an unrecorded area at that time is used, that is, a track (music or the like) that has been recorded so far is used. ) And recording from the position of the optical head at the time of performing the recording operation (regardless of whether the music is already recorded or unrecorded area). If you want to continue recording, that is, if you want to erase the recording status from an arbitrary position of the user and overwrite it with a new one like a tape recording, such a recording method It would be desirable to be able to select
[0005]
In many cases, the playback device wants the optical head to access the last position recorded so far.
For example, in order to check a previously recorded song or to confirm whether or not the song has been correctly recorded to the end after recording, it is desirable to reproduce the vicinity of the rear end of the last song. However, in order to reproduce the rear end of the final song, for example, after performing the heading operation of the final song, it is necessary to continue the cue (fast-forward playback) operation to reach the reproduction position, and the operation is complicated. In addition, there is a problem that it takes a long time to reproduce.
[0006]
[Means for Solving the Problems]
In view of the above problems, the present invention allows a recording / reproducing apparatus to select a desired recording method at the time of recording, and to easily and quickly access the rear end position of the last track for reproduction at the time of reproduction. The goal is to be able to do it.
[0007]
Therefore, as a recording / reproducing apparatus, an unrecorded area and a recorded area can exist discretely, and data is recorded on a disk-shaped recording medium on which management information for managing the unrecorded area and the recorded area is recorded. In the recording / reproducing apparatus, a reproducing unit for reproducing the management information recorded on the disk-shaped recording medium, a storage unit for storing the management information reproduced by the reproducing unit, and a management information stored in the storage unit Link information management means for rewriting a plurality of unrecorded area management information for managing unrecorded areas; end search instruction operation means for inputting a search instruction for the end of the recorded area; and recording instruction operation for issuing a recording instruction Means, a playback instruction operating means for giving a playback instruction, and the terminal end search instruction operating means being operated And A plurality of unrecorded areas of the disc-shaped recording medium based on the unrecorded area management information stored in the storage means; When it is determined that there is an unrecorded area located at the outermost periphery of the disc-shaped recording medium, The recording head is moved to the vicinity of the start of the unrecorded area located on the outer periphery, and the reproduction is performed after the recording end search instruction operation means is operated. operation Instruction means operation In this case, control means is provided for transferring the reproduction head to the end of the track recorded immediately before based on the management information stored in the storage means.
[0008]
As a recording and reproducing method, an unrecorded area and a recorded area can exist discretely, and recording is performed by recording data on a disc-shaped recording medium on which management information for managing the unrecorded area and the recorded area is recorded. In the reproducing method, a step of reproducing the management information recorded on the disc-shaped recording medium, a step of storing the reproduced management information in a storage means, and an unrecorded area from the management information stored in the storage means. Rewriting a plurality of unrecorded area management information for managing Instruct search for end of recorded area When an end search instruction is detected And A plurality of unrecorded areas of the disc-shaped recording medium based on the unrecorded area management information stored in the storage means; When it is determined that there is an unrecorded area located at the outermost periphery of the disc-shaped recording medium, Transferring the recording head to the vicinity of the start of the unrecorded area located on the outer periphery; Instruct search for end of recorded area When a recording instruction is further detected after the end search instruction is detected, a step of transferring the reproducing head to the end of the track recorded immediately before based on the management information is provided.
[0009]
[Action]
A recording end search operation unit is provided, and if a recording operation is performed after the operation of the recording end search operation unit (that is, after an operation that the user can recognize as being at the end of the previously recorded portion), until that time, If the recorded track data is recorded in an unrecorded area without erasing it, and in the case of a normal recording operation, recording is performed from the address at that time, so that the user can use two recording methods. Can be selected. In addition, by accessing the end address of the last music piece by the recording end search operation means, it is possible to reproduce and check the end of the recording easily and quickly.
[0010]
【Example】
Hereinafter, a recording / reproducing apparatus using a magneto-optical disk as a recording medium will be described as an embodiment of a recording apparatus and a reproducing apparatus of the present invention with reference to FIGS.
1. Configuration of recording / playback device
2. Disc data recording form and area structure
3. P-TOC sector
4. U-TOC sector
5. Free area management form
6. Processing based on end search key operation
7. Operation example using end search key
[0011]
<1. Configuration of recording / reproducing device>
1A to 1D are a plan view, a front view, a right side view, and a left side view showing the appearance of the recording / reproducing apparatus.
Reference numeral 30 denotes a recording / reproducing apparatus main body, and reference numeral 31 denotes a display unit such as a liquid crystal display.
Numeral 32 denotes a disk insertion unit into which a magneto-optical disk housed in a cartridge is inserted and loaded into an internal recording / reproducing optical drive system.
[0012]
The recording / reproducing apparatus main body 30 is provided with various operation means as an operation input unit. For example, a recording switch 33, an eject key 34, and an editing switch 35 are provided on the front side of the main body.
On the upper surface of the main body, a play key 36, a pause (pause) key 37, a stop key 38, an AMS key 39, a search key 40, a song name input mode key 41, a disc name input mode key 42, a date input mode key 43, and a numeric keypad 44 , An enter key 45, and an end search key 46 used for searching for the end position (end address) of the final music piece.
Three or two alphabets or spaces are respectively assigned to the numeric keys of the numeric keypad 44, and are used for character input.
[0013]
A hold switch 48, a play mode key 49 for selecting repeat / shuffle / program playback, a bass boost switch 50, and a resume switch 51 are provided on the right side of the main body, and an AGC switch 52 and a microphone attenuator switch are provided on the left side of the main body. 53 are provided.
Further, reference numeral 54 denotes a volume knob, and reference numeral 55 denotes a recording level adjustment knob.
[0014]
Various input / output terminals are provided on the side surface of the main body.
56 is a microphone input terminal and 57 is a headphone output terminal. An input terminal 58 is also used as a digital audio signal input terminal and an analog audio signal line input terminal via an optical cable. Description of the terminal mechanism for dual use is omitted. An output terminal 59 is also used as a digital audio signal output terminal via an optical cable and an analog audio signal line output terminal.
[0015]
FIG. 2 is a block diagram of a main part inside the recording / reproducing apparatus of FIG.
In FIG. 2, reference numeral 1 denotes a magneto-optical disc on which, for example, audio data is recorded, and schematically shows a state where the disc is loaded from the disc insertion unit 32.
The magneto-optical disk 1 is driven to rotate by a spindle motor 2. Reference numeral 3 denotes an optical head for irradiating the magneto-optical disk 1 with a laser beam during recording / reproducing, which produces a high-level laser output for heating a recording track to the Curie temperature during recording, and uses a magnetic Kerr effect during reproduction. A relatively low level laser output for detecting data from the reflected light.
[0016]
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 and coming from the disk.
[0017]
Reference numeral 6a denotes a magnetic head for applying a magnetic field modulated by the supplied data to the magneto-optical disk, and is arranged at a position facing the optical head 3 with the magneto-optical disk 1 interposed therebetween. The entire optical head 3 and the magnetic head 6a can be moved in the disk radial direction by the thread mechanism 5.
[0018]
Information detected from the magneto-optical 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 to execute a reproduction RF signal, a tracking error signal, a focus error signal, absolute position information (absolute position information recorded as a pre-groove (wobbling groove) on the magneto-optical disk 1), The address information, focus monitor signal, and the like are extracted. Then, the extracted reproduction RF signal is supplied to the encoder / decoder unit 8. The tracking error signal and the focus error signal are supplied to a servo circuit 9, and the address information is supplied to an address decoder 10. Further, the absolute position information and the focus monitor signal are supplied to a system controller 11 constituted by a microcomputer, for example.
[0019]
The servo circuit 9 generates various servo drive signals based on the supplied tracking error signal, focus error signal, track jump command and seek command from the system controller 11, rotation speed detection information of the spindle motor 2, and the like. And the thread mechanism 5 to perform focus and tracking control, and also controls the spindle motor 2 to a constant angular velocity (CAV) or a constant linear velocity (CLV).
[0020]
The reproduced RF signal is subjected to EFM demodulation and decoding processing such as CIRC in the encoder / decoder section 8, and then temporarily written to the buffer RAM 13 by the memory controller 12. The reading of data from the magneto-optical disk 1 by the optical head 3 and the transfer of reproduced data in the system from the optical head 3 to the buffer RAM 13 are performed at 1.41 Mbit / sec and intermittently.
[0021]
The data written in the buffer RAM 13 is read out at a timing when the transfer of the reproduction data becomes 0.3 Mbit / sec, and supplied to the encoder / decoder unit 14. Then, the digital signal is subjected to a reproduction signal processing such as a decoding processing for the audio compression processing to be an output digital signal.
The output digital signal is converted into an analog signal by the D / A converter 15 and supplied to the output terminal 59 or the headphone output terminal 57 shown in FIG. Alternatively, the signal is directly supplied to the output terminal 59 without being converted into an analog signal.
That is, when headphones are connected to the headphone output terminal 57, an analogized audio signal is supplied to the headphones, and when an audio code (for example, a pin plug cord) is connected to the output terminal 59, the analogized audio signal is supplied. The audio signal is supplied to another device by the audio code.
When an audio optical cable is connected to the output terminal 59, an audio signal is supplied to other devices as digital data.
[0022]
Here, the writing / reading of data to / from the buffer RAM 13 is performed by specifying an address by the control of the write pointer and the read pointer by the memory controller 12, and the write pointer (write address) is set to 1.41 as described above. Since the read pointer (read address) is incremented at the timing of 0.3 Mbit / sec, the read pointer (read address) is incremented at the timing of Mbit / sec. The degree data is stored. When the full capacity data is accumulated in the buffer RAM 13, the increment of the write pointer is stopped, and the operation of reading data from the magneto-optical disk 1 by the optical head 3 is also stopped. However, since the read pointer R is continuously incremented, the reproduced audio output is not interrupted.
[0023]
Thereafter, only the read operation from the buffer RAM 13 is continued, and if the amount of data stored in the buffer RAM 13 becomes smaller than a predetermined amount at a certain point in time, the data read operation by the optical head 3 and the increment of the write pointer are restarted again. Then, the data of the buffer RAM 13 is accumulated again.
[0024]
By outputting the reproduced audio signal via the buffer RAM 13 in this manner, even if tracking is lost due to disturbance or the like, for example, the output of the reproduced audio is not interrupted. By accessing the correct tracking position and resuming data reading, the operation can be continued without affecting the reproduction output. That is, the vibration resistance function can be significantly improved.
[0025]
In FIG. 2, address information output from an address decoder 10 and subcode data used for control operations are supplied to a system controller 11 via an encoder / decoder unit 8 and used for various control operations.
Further, the system controller 11 is also supplied with a lock detection signal of a PLL circuit for generating a bit clock for the recording / reproducing operation, and a monitor signal indicating a lack of a frame synchronization signal of reproduced data (L and R channels).
[0026]
Further, the system controller 11 controls a laser control signal S for controlling the operation of the laser diode in the optical head 3. _LP The output of the laser diode is controlled to be on / off. At the time of the on-control, the output during reproduction in which the laser power is relatively low and the output during recording in which the laser power is relatively high are Can be switched.
[0027]
When a recording operation is performed on the magneto-optical disk 1, an analog or digital audio signal is supplied from another device via an audio code or an audio optical cable connected to the input terminal 58. Alternatively, a microphone is connected to the microphone input terminal 56 to supply an audio signal.
[0028]
The audio signal transmitted to the input terminal 58 as digital data by the audio optical cable is directly supplied to the encoder / decoder unit 14. Further, the audio code or the analog audio signal input by the microphone is supplied to the A / D converter 18, converted into digital data, and then supplied to the encoder / decoder 14.
The encoder / decoder 14 performs audio compression encoding on the input digital audio signal. The recording data compressed by the encoder / decoder section 14 is temporarily written into the buffer RAM 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 by the encoder / decoder section 8, the encoded data is supplied to the magnetic head drive circuit 6.
[0029]
The magnetic head drive circuit 6 supplies a magnetic head drive signal to the magnetic head 6a according to the encoded recording data. That is, the magnetic head 6a applies an N or S magnetic field to the magneto-optical disk 1. At this time, the system controller 11 supplies a control signal to the optical head so as to output a recording level laser beam.
[0030]
Reference numeral 19 denotes an operation input unit provided with keys used for user operations, and the above-described switches 33 to 53 or keys correspond thereto.
[0031]
When performing a recording / reproducing operation on the disk 1, management information recorded on the disk 1, that is, P-TOC (pre-mastered TOC) and U-TOC (user TOC) are read out, and the system controller is read. Reference numeral 11 determines the address of the segment to be recorded on the disk 1 and the address of the segment to be reproduced on the disk 1 according to the management information. The management information is held in the buffer RAM 13. Therefore, in the buffer RAM 13, a buffer area for the recording data / reproduced data and an area for holding the management information are divided and set.
[0032]
Then, when the disk 1 is loaded, the system controller 11 reads out the management 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 RAM 13. Thereafter, it can be referred to at the time of the recording / reproducing operation on the disc 1.
[0033]
The U-TOC is edited and rewritten in accordance with recording and erasing of data. The system controller 11 performs this editing process on the U-TOC information stored in the buffer RAM 13 every time a recording / erasing operation is performed. The U-TOC area of the disk 1 is also rewritten at a predetermined timing in accordance with the rewriting operation.
[0034]
<2. Data recording form and area structure of disc>
The recording form of the track data recorded on the disk 1 by such a recording / reproducing apparatus will be described with reference to FIGS.
In a magneto-optical disk, random access is extremely easy as compared with a tape-shaped recording medium such as a DAT or a compact cassette tape. Therefore, the order from the first track to the n-th track from the inner circumference to the outer circumference on the disk is large. There is no need to record correctly. In other words, even if each music piece is physically recorded on the disk at a different position, as long as the recorded address of each music piece from the first track to the n-th track is managed, the music piece is reproduced in the correct music order. I can do it.
[0035]
Further, for example, one track (song) does not necessarily need to be recorded in a continuous segment (a segment is a portion where physically continuous data is recorded), and is not necessarily recorded on a disc. There is no problem even if it is recorded separately in a plurality of segments.
[0036]
In particular, as described above, in a system in which data read from a magneto-optical disk is temporarily stored in the buffer RAM 13 at a high rate, read from the buffer RAM 13 at a low rate and demodulated as an audio reproduction signal, the Even if the data reading from the magneto-optical disk is temporarily interrupted by the access, the reproduced sound can be output without interruption.
[0037]
Therefore, if the recording / reproducing operation in the segment and the high-speed access operation (the access operation completed within the reproducible time due to the data storage amount caused by the difference between the writing rate and the reading rate of the buffer RAM 13) are repeated, one music piece is obtained. Even if the track is physically divided into a plurality of segments, the recording / reproduction of the music can be prevented.
[0038]
For example, as shown in FIG. ₁ , The second song is segment M _Two , But as the fourth and fifth songs, the segment M _{4 (1)} ~ M _{4 (4)} , M _{5 (1)} ~ M _{5 (2)} It is also possible to divide and record on a disc as shown in FIG. (Note that FIG. 3 is a schematic diagram, and in practice, one segment often covers several to several hundred tracks or more.)
[0039]
When recording or erasing of music on a magneto-optical disk is repeated, empty areas on tracks are generated irregularly due to differences in the playing time of the music to be recorded or the playing time of the erased music. By performing discrete recording on a piece of music, for example, a piece of music longer than the deleted piece of music can be recorded using the erased portion, and data recording area is wasted by repeated recording / erasing. That is resolved. Note that what is recorded is not limited to “songs”, but includes any signal if it is an audio signal. Hereinafter, it is assumed that music is recorded as one unit of data (track) that is continuous in content. Will be explained.
[0040]
Of course, for such a disc, recording is continued while accessing a plurality of unrecorded segments at the time of recording, and segments are accessed at the time of reproduction so that one piece of music is correctly and continuously reproduced. Must be done. For this purpose, a segment (for example, M _{4 (1)} ~ M _{4 (4)} ) And data indicating an unrecorded area are held as U-TOC information which is rewritten for each recording operation or erasing operation as described above, and the recording / reproducing apparatus uses this U-TOC information. Is read and the head is accessed, so that the recording / reproducing operation is controlled appropriately.
[0041]
On the recording track of the disk 1, as shown in FIG. 4, a cluster CL (= 36 sectors−) composed of a sub data area of 4 sectors (1 sector = 2352 bytes) and a main data area of 32 sectors is formed continuously. Thus, one cluster is the minimum unit for recording. One cluster corresponds to two or three tracks. The address is recorded for each sector.
The 4-sector sub-data area is used as sub-data and linking area, and TOC data, audio data, and the like are recorded in the 32-sector main data area.
[0042]
The sectors are further subdivided into sound groups, and two sectors are divided into 11 sound groups. Then, in the sound group, 512 samples of data are recorded separately for the L channel and the R channel. One sound group has an audio data amount corresponding to a time of 11.6 msec.
[0043]
FIG. 5 schematically shows the area structure of the disk in the radial direction.
In the case of a magneto-optical disk, an area in which data is recorded by embossed pits (a pre-mastered area) as roughly shown as a pit area in FIG. 5 and a groove area in which a groove is provided as a so-called magneto-optical area Divided into
[0044]
Here, P-TOC is repeatedly recorded as a pit area. As described later, in this P-TOC, the position of the U-TOC is the U-TOC start address UST. _A And the readout start address RO _A , Recordable user area start address RST _A , Power cal area start address PC _A For example, each address position shown in FIG. 5 is shown.
[0045]
A groove area is formed following the innermost pit area of the disk, and the lead-out start address RO in the P-TOC in the groove area is formed. _A The area up to the address indicated by is designated as a recordable recordable area, and hereinafter referred to as a lead-out area.
[0046]
Further, among the recordable areas, the recordable user area in which the music data track is actually recorded is a recordable user area start address RST. _A From the readout start address RO _A It is up to the position just before.
[0047]
In the groove area, the recordable user area start address RST _A The earlier area is a management area for the recording / reproducing operation, in which the above-mentioned U-TOC and the like are recorded, and the power CAL area start address PC _A Is provided as a laser power calibration area from the position shown as.
The U-TOC has a U-TOC start address UST in the management area for this recording / reproducing operation. _A Are recorded consecutively from the position indicated by (3) (3 clusters (1 cluster = 36 sectors)).
[0048]
<3. P-TOC sector>
Here, the P-TOC sector will be described first as management information for managing the audio data sector recorded in the disk 1 in the form of sector data and the recording / reproducing operation of the audio data.
As the P-TOC information, designation of an area such as a recordable area (recordable user area) of the disc, management of the U-TOC area, and the like are performed. When the disc 1 is a pre-mastered disc which is a read-only optical disc, it is possible to manage music recorded in a ROM by the P-TOC.
[0049]
FIG. 6 shows the format of the P-TOC.
FIG. 6 shows one sector (sector 0) of P-TOC information repeatedly recorded in the pit area of FIG. The P-TOC format is optional for sectors 1 and subsequent.
[0050]
In the data area of the P-TOC sector (4 bytes x 588, 2352 bytes), a synchronization pattern consisting of all 0's or all 1's 1 byte data is added to the head position, and 4 bytes of an address indicating a cluster address and a sector address are added. Thus, the above is set as a header and indicates that the area is a P-TOC area.
[0051]
Following the header, an identification ID in ASCII code corresponding to the character "MINI" is added at a predetermined address position.
Next, the disc type, the recording level, the number of the first music piece recorded (First TNO) and the number of the last music piece (Last TNO) are indicated, and the address of each point shown in FIG. , Readout start address RO _A , Power cal area start address PC _A , Start addresses UST of U-TOC (data area of U-TOC sector 0 in FIG. 7 described later) _A , Start address RST of recordable area (recordable user area) _A Is recorded as
[0052]
Subsequently, a correspondence table instruction data section having table pointers (P-TNO1 to P-TNO255) for associating each recorded music or the like with a parts table in a management table section described later is prepared.
[0053]
In the area following the corresponding table instruction data section, 255 parts tables (01h) to (FFh) are provided corresponding to the table pointers (P-TNO1 to P-TNO255) in the corresponding table instruction data section. A prepared management table section is prepared (in this specification, numerical values with “h” are in so-called hexadecimal notation). 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 segment (track) for a certain segment can be recorded.
[0054]
The track mode information in each part table records, for example, information as to whether the segment is set to prohibit overwriting or data copying, audio information, monaural / stereo type, and the like. .
[0055]
In each of the parts tables from (01h) to (FFh) in the management table section, the contents of the segment are indicated by the table pointers (P-TNO1 to P-TNO255) of the corresponding table instruction data section. In other words, for the first song, a part table (for example, (01h)) is used as the table pointer P-TNO1. However, the table pointer is actually a byte position in the P-TOC sector 0 by a predetermined calculation process. In this case, the start address of the parts table (01h) is the start address of the recording position of the first music piece, and the end address is the same as the end address of the first music piece. The end address of the position where the first song is recorded. Further, the track mode information is information on the first music piece.
[0056]
Similarly, for the second song, the start address, end address, and track mode information of the recording position of the second song are recorded in the parts table (for example, (02h)) indicated by the table pointer P-TNO2.
Similarly, table pointers up to P-TNO255 are prepared in the same manner, so that up to the 255th tune can be managed on the P-TOC.
Then, by forming the P-TOC sector 0 in this way, for example, at the time of reproduction, a predetermined music piece can be accessed and reproduced.
[0057]
In the case of a recordable / reproducible magneto-optical disk, since there is no so-called premastered music area, the above-mentioned correspondence table instruction data section and management table section are not used (these are managed by the U-TOC described below). Therefore, each byte is set to “00h”.
However, for a pre-mastered type disc in which all songs are recorded in a ROM form (pit form) and a hybrid type disc having both a ROM area and a magneto-optical area as an area for recording songs and the like, The correspondence table instruction data section and the management table section are used for managing the music in the ROM area.
[0058]
<4. U-TOC Sector>
Next, the U-TOC will be described.
FIG. 7 shows the format of one sector (sector 0) of the U-TOC, in which management information is mainly recorded for the music recorded by the user and for the unrecorded area (free area) where new music can be recorded. Data area. Note that the U-TOC is also optional for sectors 1 and later.
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, and can record audio data there. ing. At the time of reproduction, an area in which music to be reproduced is recorded is determined from the U-TOC, and the reproduction operation is performed by accessing the area.
[0059]
In the U-TOC sector (sector 0) shown in FIG. 7, a header is first provided similarly to the P-TOC, and then, at a predetermined address position, a maker code, a model code, and a music number of the first music (First TNO) are set. ), The last song number (Last TNO), sector use status, disk serial number, disk ID, etc. are recorded. In addition, the area of the music recorded and recorded by the user, the unrecorded area, etc. Are associated with a management table section described later, various table pointers (P-DFA, P-EMPTY, P-FRA, P-TNO1 to P-TNO255) are recorded as a corresponding table instruction data section. An area is prepared.
[0060]
Then, 255 parts tables (01h) to (FFh) are provided as a management table section to be associated with the table pointers (P-DFA to P-TNO255) of the corresponding table instruction data section. As in the case of the P-TOC sector 0 in FIG. 6, a start address serving as a starting point, an end address serving as an end, and mode information (track mode) of the segment are recorded. In the case of the TOC sector 0, since the segment indicated by each part table may be successively connected to another segment, link information indicating the part table in which the start address and end address of the connected segment are recorded. Can be recorded.
[0061]
In this type of recording / reproducing apparatus, as described above, even if data of one music piece is physically discontinuous, that is, even if it is recorded over a plurality of segments, the data is reproduced while accessing between the segments, so that the reproducing operation is performed. Since there is no problem, a music piece or the like recorded by the user may be recorded in a plurality of segments for the purpose of efficient use of the recordable area. For this reason, link information is provided, for example, the numbers (01h) to (FFh) given to the respective parts tables (actually indicated by a numerical value which is a byte position in the U-TOC sector 0 by a predetermined arithmetic processing) Thus, the parts tables can be connected by designating the parts tables to be connected. (Because music or the like recorded in a pit form in advance is not usually divided into segments, the link information in the P-TOC sector 0 is all "(00h)" as shown in FIG. )
[0062]
In other words, in the management table section in the U-TOC sector 0, one parts table represents one segment. For example, for a music composed by connecting three segments, three parts connected by link information are used. The segment position is managed by the table.
[0063]
Each part table from (01h) to (FFh) in the management table section of the U-TOC sector 0 is a table pointer (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 segment as follows:
[0064]
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 (= segment) serving as a defective area due to a scratch or the like is shown. Parts table is specified. In other words, if a defective segment exists, any one of (01h) to (FFh) is recorded in the table pointer P-DFA, and the corresponding segment table indicates the defective segment by the start and end addresses. . If another defective segment exists, another part table is designated as link information in the part table, and the defective segment is also shown in the part table. If there is no other defective segment, the link information is set to, for example, "(00h)", and there is no link thereafter.
[0065]
The table pointer P-EMPTY indicates the head part table of one or more unused part tables in the management table section. If an unused part table exists, the table pointer P-EMPTY is set as (01h) as the table pointer P-EMPTY. ) ~ (FFh) is recorded. If there are multiple unused part tables, the part table specified by the table pointer P-EMPTY is sequentially specified by the link information, and all the unused part tables are connected on the management table section. Is done.
[0066]
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 portion (= segment) serving as the free area. The first parts table in the table is specified. That is, when a free area exists, any one of (01h) to (FFh) is recorded in the table pointer P-FRA, and the corresponding free area segment is indicated by the start and end addresses in the corresponding part table. Have been. When there are a plurality of such segments, that is, when there are a plurality of parts tables, the link information sequentially designates the parts tables whose link information is "(00h)".
[0067]
FIG. 8 schematically shows the management state of a segment that becomes a free area using a parts table. This is because when the segment (03h) (18h) (1Fh) (2Bh) (E3h) is set as the free area, this state follows the corresponding table instruction data P-FRA and the parts table (03h) (18h) (1Fh) The state represented by the link (2Bh) (E3h) is shown. It should be noted that the above-described management of the defective area and the unused parts table is the same.
[0068]
By the way, in the case of a magneto-optical disk in which audio data such as music is not recorded at all and there is no defect, the parts table (01h) is designated by the table pointer P-FRA, and thereby the entire recordable user area of the disk is designated. Is an unrecorded area (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 The parts table (03h) is specified as the link information, the parts table (04h) is specified as the link information of the part table (03h), and so on, and the parts table (FFh) is linked. In this case, the link information of the parts table (FFh) is set to "(00h)" indicating that there is no connection thereafter.
At this time, 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.
[0069]
The table pointers P-TNO1 to P-TNO255 indicate songs recorded by the user on the magneto-optical disk 1. For example, in the table pointer P-TNO1, one or a plurality of segments in which data of the first song is recorded Specifies the parts table in which the temporally first segment is indicated.
[0070]
For example, if the first tune is recorded on the disc without dividing the tracks (that is, in one segment), the recording area of the first tune is the start area in the parts table indicated by the table pointer P-TNO1. And the end address.
[0071]
Further, for example, when the second piece of music is discretely recorded on a plurality of segments on the disc, each segment is designated in order of time to indicate the recording position of that music. In other words, from the part table designated by the table pointer P-TNO2, another part table is sequentially designated by the link information in a temporal order, and linked to the part table in which the link information is "(00h)". (Same form as above, FIG. 8). In this way, for example, all the segments in which the data constituting the second tune are recorded are sequentially designated and recorded, so that the data of the U-TOC sector 0 can be used to reproduce the second tune or the second tune. When performing overwriting on the area, it is possible to access the optical head 3 and the magnetic head 6 to extract continuous music information from discrete segments, and to perform recording using the recording area efficiently.
[0072]
As described above, the area management on the disc is performed by the P-TOC, and the music and free area recorded in the recordable user area are performed by the U-TOC.
The TOC information is read into the buffer RAM 13 so that the system controller 11 can refer to it.
[0073]
<5. Free Area Management Form>
The management mode of the free area in the U-TOC will be described with reference to FIG.
FIG. 9A schematically shows an example of a usage form of a segment in a disc in which two pieces of music are recorded in the recordable user area.
Here, the first song is M _{1 (1)} And M _{1 (2)} And the second song is M _{2 (1)} , M _{2 (2)} , M _{2 (3)} And three segments. And F as a free area ₁ ~ F _Five 5 segments are left. Segment F ₁ Is immediately before the lead-out address of the disk.
[0074]
F ₁ ~ F _Five Segment of the U-TOC is F ₁ , F _Two , F _Three , F _Four , F _Five In the state shown in FIG. 8, for example, if the recording of the third tune is made in the free area, the segment F ₁ , And then are accessed and recorded in link order.
[0075]
Now, assuming that the erasure of the second music has been executed from the state of FIG. _{2 (1)} , M _{2 (2)} , M _{2 (3)} Each segment will be referred to as a free area hereinafter. Therefore, it is necessary to rewrite the data relating to the free area linked from the correspondence table designation data P-FRA in the U-TOC. At this time, a new free link structure is created without simply linking and managing the segment newly set as the free area from the last segment (F-5) of the free area up to that time.
[0076]
That is, if the segment located at the outermost circumference of the disk is a free area, this is linked first, and other segments are linked in order of address from the inner circumference side of the disk. Therefore, the free area is F as shown in FIG. ₁ , F _Two .... F ₈ The U-TOC data is rewritten so that it is linked and managed.
[0077]
When the free area is always present at the outermost circumference, the free area is first managed, and the other areas are sequentially linked and managed from the inner circumference side. Can be divided into a plurality of segments while minimizing the possibility of being divided, and even when divided, recording can be performed so as to be continued to relatively close segments. It is possible to prevent the deterioration of the vibration resistance. That is, since the recording operation is normally performed sequentially from the inner circumference side, the free area on the outermost circumference side of the disc is often the largest free area, and one music piece may need to be recorded in a plurality of segments. This is the first, since the property is low. If the other free areas are linked from the inner circumference side in the order of addresses, the access distance is minimized.
[0078]
<6. Processing based on operation of end search key>
In the recording / reproducing apparatus of the present embodiment as described above, the end search key 46 is provided as shown in FIG. 1, and the user can perform a required operation by using the end search key 46.
Hereinafter, processing based on the operation of the end search key 46 (control by the system controller 11) will be described.
[0079]
FIG. 10 is a flowchart showing processing of the system controller 11 related to the operation of the end search key 46. Note that the processing in the normal recording mode and the reproduction mode is shown only as the recording mode processing and the reproduction mode processing, and will not be described in detail.
[0080]
If the recording switch 33 is operated without pressing the end search key 46 (F101 → F102 → YES) during the operation of the playback mode (playback, playback pause, etc.) or during stoppage (F100), the normal recording is performed. Enter processing. That is, the music number (track number) is incremented, and recording is started from the position of the optical head at that time during reproduction or reproduction pause (F103 → F104). In this case, if a music piece has already been recorded at the position to be recorded, it will be deleted. That is, as in the case of the tape recorder, the user forcibly erases past data from an arbitrary position and performs recording.
[0081]
However, when the end search key 46 is operated, the process proceeds from step F101 to F105, and at this time, the music number and time of the last track are displayed. For example, if the disc has recorded five songs, "5" is displayed as the last song number (track number). Since this numerical value is managed as “Last TNO” in the U-TOC, the system controller 11 controls the display operation with reference to this. The time display is based on the end position (end address position) of the final song. For example, when five songs have been recorded, the total time until the end of the fifth song or the remaining recordable time (that is, a numerical value obtained by converting the total free area at that time into time) is displayed. Note that, for example, the progress time at the end address point of only the fifth tune or the date and time information of the recording of the fifth tune may be displayed.
In the display state of the information of the end address point of the final music, the next operation is waited. That is, the system controller 11 subsequently operates the recording switch (F106), presses the play key 36 (F107), presses the AMS key 39 (F108), or presses the stop key 38. (F109) is detected.
[0082]
Here, if the user presses the stop key 38, the process directly enters the stop processing (F120).
If the user turns on the recording switch 33, the process proceeds to step F110 to make the optical head 3 access the head address of the free area.
That is, the start address of the parts table indicated first from the table pointer P-FRA on the U-TOC is read, and that address is accessed. Therefore, for example, in the case of FIG. ₁ Is moved to the first position.
[0083]
Then, the music number is incremented, and recording in the free area is started (F111 → F121). In this case, unlike the normal recording process in step F104, recording is performed by sequentially accessing the free areas. That is, the previously recorded music is not erased. For example, in the example of FIG. ₁ Perform recording for free area F ₁ If the recording is still ongoing at the time when the recording is completed, the link structure in the U-TOC is followed, and the audio data subsequently input is free area F _Two Recorded in the free area F _Three , F _Four It is recorded.
[0084]
Next, when the play key 36 is pressed after the end search key 46 is pressed, the process proceeds from step F107 to F112, and the optical head 3 moves to the end address position of the last music displayed in step F105. To access. At the end of the access, the reproduction is paused.
[0085]
Here, it waits for a search operation in the review (rewind) direction by the search key 40 (F113). Then, when the review search operation is performed, the review reproduction is executed while the key is pressed in the return direction from the end address position of the last music as a starting point (F114, F115). In practice, while waiting for the search key 40, the AMS key 39 and the stop key 38 may be accepted, and the process may proceed to step F118 or F120.
When the user releases the finger from the search key 40 to stop the review playback operation, the playback operation is started from the position where the review playback has ended, and returns to the normal playback mode (F116, F117).
[0087]
Also, if the AMS key 39 (the AMS key of the beginning of the forward direction) is pressed after the end search key 46 is pressed, the process proceeds from step F108 to F118, and the process proceeds to step F105. The optical head 3 is made to access the head position (start address position). Of course, the information of the start address is obtained from the U-TOC. Then, the reproduction operation is started at the end of the access, and the operation returns to the normal reproduction mode (F119 → F117).
[0088]
The system controller 11 performs the above-described processing in accordance with the operation of the end search key 46, so that the user can perform a recording operation by forcibly recording from an arbitrary position and the music that has been recorded until then. You can choose to record in the free area so as not to erase.
When the user wants to play back the vicinity of the end address position of the final song for confirmation of recording, etc., the user can easily and quickly access the position by operating the end search key 46 and the play key 36, and review or play back the position. It can be played normally after the review.
[0089]
<7. Operation example using end search key>
FIGS. 11 to 16 show various examples of the operation state by the processing based on the operation of the end search key 46. FIG.
[0090]
FIG. 11 shows the music M ₁ ~ M _Four Are sequentially recorded as physical positions on the disk 1 in sequence, and the music M _Four After that, free area F ₁ Is shown.
In this case, the reference position when the end search key 46 is operated is the music M indicated as ES in FIG. _Four End address. When the play key 36 is pressed following the operation of the end search key 46 and the review playback operation is performed, the music M _Four From the end address in the forward direction (the inner circumferential side of the disc), and when the review playback is completed, normal playback is performed as shown by the solid line in the figure (steps F112, F112, F113). , F114, F115, F116 and F117).
When the AMS key 39 is pressed after the operation of the end search key 46, the music M _Four The reproduction is executed by accessing the start address (steps F119 and F117).
[0091]
Further, when the recording switch 33 is operated after the operation of the end search key 46, the free area F ₁ Is accessed and the free area F ₁ (Steps F110, F111, and F121).
[0092]
By the way, as shown in FIG. 11B, when the optical head is at the position indicated by PP in the reproduction or the reproduction pause operation and the recording switch 33 is operated without operating the end search key 46, the Music M from the position of PP _Three , M _Four The recording (steps F103 and F104) is performed while erasing the data (shaded area).
[0093]
FIG. 12 shows music M on disk 1. ₁ ~ M _Four Are recorded in order on the disk 1, and the music M _Four After that, free area F ₁ , But the song M _Two And M _Three Free area F between _Two Indicates the case where exists.
Also in this case, the reference position when the end search key 46 is operated is the music M shown as ES in FIG. _Four End address.
[0094]
When the play key 36 is pressed following the operation of the end search key 46 and the review playback operation is performed, the music M _Four Fast forward playback from the end address of the disc (forward to the inner circumference side of the disc), and normal playback is performed as shown by the solid line in the figure when the review playback is completed (F112, F112, F113, F114, F115, F116, F117).
When the AMS key 39 is pressed after the operation of the end search key 46, the music M _Four The reproduction is executed by accessing the start address (F119, F117).
[0095]
Further, when the recording switch 33 is operated after the operation of the end search key 46, the free area F which is the first free area on the U-TOC is set. ₁ Is accessed and the free area F ₁ Is recorded. If recording is free area F ₁ If it does not end with only free area F _Two And the recording is continued (F110, F111, F121).
[0096]
When the optical head is at the position indicated by PP in the drawing due to the reproduction or the reproduction pause operation as shown in FIG. 12B, when the recording switch 33 is operated without operating the end search key 46, the Music M from the position of PP _Two Free area F while deleting the data in the shaded area _Two The recording will be performed over steps (F103, F104).
[0097]
FIG. 13 shows music M on disk 1. ₁ ~ M _Four 4 songs are M ₁ , M _Two , M _Four , M _Three Music is recorded physically continuously in the order of _Three After that, free area F ₁ Is the case.
In this case, the reference position when the end search key 46 is operated is the music M shown as ES in FIG. _Four End address.
[0098]
When the play key 36 and the review search key 40 are pressed following the operation of the end search key 46, the music M _Four Fast forward playback from the end address is performed, and normal playback is performed as shown by the solid line in the figure when the review playback is completed.
When the AMS key 39 is pressed after the operation of the end search key 46, the music M _Four The reproduction is executed by accessing the start address.
Further, when the recording switch 33 is operated after the operation of the end search key 46, the free area F ₁ Is accessed and the free area F ₁ Is recorded.
[0099]
FIG. 14 shows music M on disk 1. ₁ ~ M _Four 4 songs are M ₁ , M _Two , M _Four , M _Three Music M _Three The area on the outer peripheral side is free area F ₁ In addition, the song M _Two And M _Four Free area F between _Two Is present.
When the end search key 46 is operated, the reference position is the music M shown as ES in FIG. _Four End address.
[0100]
Then, by operating the playback key 36 and the review search key 40 following the operation of the end search key 46, the music M _Four Fast forward playback from the end address is performed, and normal playback is performed as shown by the solid line in the figure when the review playback is completed.
When the AMS key 39 is pressed after the operation of the end search key 46, the music M _Four The reproduction is executed by accessing the start address.
Further, when the recording switch 33 is operated after the operation of the end search key 46, the free area F which is the first free area on the U-TOC is set. ₁ Is accessed and the free area F ₁ Is recorded. If the recording continues, the free area F _Two Is accessed and recording is continued.
[0101]
FIG. 15 shows music M on disk 1. ₁ ~ M _Four 4 songs are M ₁ , M _Two , M _Four , M _Three Music M _Three The area on the outer peripheral side is free area F ₁ In addition, the song M _Four And M _Three Free area F between _Two Is present.
When the end search key 46 is operated, the reference position is the music M shown as ES in FIG. _Four End address.
[0102]
Then, by operating the playback key 36 and the review search key 40 following the operation of the end search key 46, the music M _Four Fast forward playback from the end address is performed, and normal playback is performed as shown by the solid line in the figure when the review playback is completed.
When the AMS key 39 is pressed after the operation of the end search key 46, the music M _Four The reproduction is executed by accessing the start address.
Further, when the recording switch 33 is operated after the operation of the end search key 46, the free area F which is the first free area on the U-TOC is set. ₁ Is accessed and the free area F ₁ Is recorded. If the recording continues, the free area F _Two Is accessed and recording is continued.
[0103]
FIG. 16 shows music M on disk 1. ₁ ~ M _Four 4 songs are M ₁ , M _Two , M _Four , M _Three And the free area does not exist.
When the end search key 46 is operated, the reference position is the music M shown as ES in FIG. _Four End address.
[0104]
Then, by operating the playback key 36 and the review search key 40 following the operation of the end search key 46, the music M _Four Fast forward playback from the end address is performed, and normal playback is performed as shown by the solid line in the figure when the review playback is completed. When the AMS key 39 is pressed after the operation of the end search key 46, the music M _Four The reproduction is executed by accessing the start address.
[0105]
In this case, even if the recording switch 33 is operated subsequent to the operation of the end search key 46, no recording is performed because there is no free area. This processing is not described in the flowchart of FIG. 10, but, for example, a display indicating that full area recording has been performed is performed.
[0106]
The embodiment of the recording / reproducing apparatus of the present invention has been described above. However, it goes without saying that the present invention is not limited to this embodiment, and various modifications can be made to the processing method and configuration within the scope of the gist. .
For example, in the process of FIG. 10, various other factors such as a mode of use of operation keys and a mode transition state can be considered. Alternatively, the end address of the final music piece may be immediately accessed when the end search key is operated.
Further, an end search key may be provided in a remote commander, a connected headphone, a microphone, or the like to enable remote control.
[0107]
In the embodiment, only the magneto-optical disk has been described. However, the disk 1 is a pre-mastered disk in which music data is recorded in a pit form, or a hybrid disk having a pit area and a magneto-optical area as a music data area. Even in this case, it goes without saying that the same operation can be realized.
Of course, the recording medium is not limited to a disk-shaped recording medium, and the present invention can be applied to a recording / reproducing apparatus corresponding to another type of recording medium such as a recording medium using a solid-state memory.
[0108]
【The invention's effect】
As described above, when the recording instruction operation is performed when the recording end search operation means is operated, the recording / reproducing apparatus of the present invention is arranged such that the recording head is located at the head address position as the unrecorded area indicated in the management information. Is provided so that the recording operation on the recording medium can be started, so that if a recording operation is performed after the operation of the recording end search operation means, the track data that has been recorded up to that point is not erased. There is an effect that the user can select two recording methods so that recording is performed in an unrecorded area, and in the case of a normal recording operation, recording is performed from the address at that time.
[0109]
Further, when the reproduction instruction operation is performed when the recording end search operation means is operated, the control means causes the reproduction head to access the end address of the track recorded immediately before. In addition, playback is paused at the end of the track, and high-speed playback is performed forward from the end of the track in response to a review search operation. For this reason, there is an effect that it is possible to easily and quickly perform reproduction confirmation of the recording end portion (near the end address of the last track).
[Brief description of the drawings]
FIG. 1 is a plan view, a front view, a right side view, and a left side view of a recording / reproducing apparatus according to an embodiment of the present invention.
FIG. 2 is a block diagram of a main part of the recording / reproducing apparatus of the embodiment.
FIG. 3 is an explanatory diagram of a recording mode on a disc.
FIG. 4 is an explanatory diagram of a sector form on a disk.
FIG. 5 is an explanatory diagram of an area structure of a disc.
FIG. 6 is an explanatory diagram of a P-TOC sector on a disk.
FIG. 7 is an explanatory diagram of a U-TOC sector in a disk.
FIG. 8 is an explanatory diagram of a link structure of a U-TOC sector on a disc.
FIG. 9 is an explanatory diagram of a management mode of a free area by U-TOC.
FIG. 10 is a flowchart of a process based on an end search key operation of the embodiment.
FIG. 11 is an explanatory diagram of an operation based on an end search key operation of the embodiment.
FIG. 12 is an explanatory diagram of an operation based on an end search key operation of the embodiment.
FIG. 13 is an explanatory diagram of an operation based on an end search key operation of the embodiment.
FIG. 14 is an explanatory diagram of an operation based on an end search key operation of the embodiment.
FIG. 15 is an explanatory diagram of an operation based on an end search key operation of the embodiment.
FIG. 16 is an explanatory diagram of an operation based on an end search key operation of the embodiment.
[Explanation of symbols]
1 disc, 3 optical heads, 8 encoder / decoder units, 11 system controller, 12 memory controller, 13 buffer RAM, 14 encoder / decoder unit, 15 D / A converter, 18 A / D converter, 19 key input unit, 30 recording / reproducing apparatus main body, 31 display unit, 33 recording switch, 36 playback key, 38 stop key, 39 AMS key, 40 search key, 46 end search key

Claims (6)

An unrecorded area and a recorded area can exist discretely, and in a recording and reproducing apparatus that records data on a disc-shaped recording medium on which management information for managing the unrecorded area and the recorded area is recorded,
Reproducing means for reproducing the management information recorded on the disc-shaped recording medium;
Storage means for storing the management information reproduced by the reproduction means,
From the management information stored in the storage means, link information management means for rewriting a plurality of unrecorded area management information for managing unrecorded areas,
An end search instruction operating means for inputting a search instruction for an end of the recorded area;
Recording instruction operation means for performing a recording instruction;
A reproduction instruction operation means for performing a reproduction instruction;
In a case where the terminating search instruction operation means is operated, the disc-shaped recording medium in a plurality of unrecorded regions of the disc-shaped recording medium on the basis of the unrecorded area management information stored in said storage means When it is determined that there is an unrecorded area located at the outermost periphery, the recording head is moved to the vicinity of the start of the unrecorded area located at the outermost periphery of the disk-shaped recording medium, and the recording end search instruction operation means is operated. A recording / reproducing apparatus comprising: a controller for moving a reproducing head to a track end recorded immediately before, based on management information stored in the storage unit, when the reproduction instruction operation unit is operated after the reproduction instruction operation unit is operated . 2. The recording / reproducing apparatus according to claim 1, wherein the control unit controls the reproduction head to be temporarily stopped after transferring the reproduction head to the end of the track recorded immediately before. . The recording and playback device,
Further comprising a review search operation means,
When the review search operation unit is operated after the reproduction by the reproduction head is paused at the end of the track recorded immediately before, the control unit moves forward from the end of the track recorded immediately before. 3. The recording / reproducing apparatus according to claim 2, wherein high-speed reproduction is performed. An unrecorded area and a recorded area can exist discretely, and in a recording / reproducing method of recording data on a disc-shaped recording medium on which management information for managing the unrecorded area and the recorded area is recorded,
Reproducing the management information recorded on the disc-shaped recording medium;
Storing the reproduced management information in storage means;
Rewriting a plurality of unrecorded area management information for managing an unrecorded area from the management information stored in the storage unit;
In a case where the terminating search instruction instructing searching of the end portion of the recorded area is detected, a plurality of unrecorded regions of the disc-shaped recording medium on the basis of the unrecorded area management information stored in said storage means When it is determined that there is an unrecorded area located at the outermost periphery of the disc-shaped recording medium, a step of transferring the recording head to near the start of the unrecorded area located at the outermost periphery of the disc-shaped recording medium ; ,
If a recording instruction is further detected after the end search instruction for instructing the search for the end of the recorded area is detected, the reproducing head is moved to the end of the track recorded immediately before based on the management information. Recording and reproducing method. 5. The recording / reproducing method according to claim 4, wherein the reproduction by the reproducing head is temporarily stopped after the reproducing head is transferred to the end of the track recorded immediately before. If a review search instruction operation is performed after the reproduction by the reproduction head is paused at the end of the track recorded immediately before, high-speed reproduction is performed forward from the end of the track recorded immediately before. The recording / reproducing method according to claim 5, wherein:

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