JP3756116B2 - Information recording / reproducing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an information recording / reproducing apparatus that reads / writes information from / to a recording medium such as a minidisc.
[0002]
[Prior art]
Here, as a conventional information recording / reproducing apparatus, a mini-disc recording / reproducing apparatus (hereinafter referred to as MD apparatus) will be described as an example. An MD device is a digital audio device that uses a mini-disc (hereinafter referred to as MD) as a recording medium and records and reproduces music, voice, and the like.
[0003]
There are three types of MD: a pre-master disc dedicated to reproduction, a recordable disc that can be reproduced and recorded, and a hybrid disc having both characteristics. Among these discs, recordable discs and hybrid discs have a non-rewritable TOC [Table Of Contents] area, a rewritable UTOC [User Table Of Contents] area, and a rewritable user data area. .
[0004]
The TOC area indicates the storage location of digital data on the disc.
[0005]
In the user data area, recording data such as music and voice is written. The user data area is an aggregate in which “sections (parts)” are assigned to each track (song). Each track is formed by this assignment. The parts of the user data area are composed of areas (actual data) where digital audio data is continuously recorded.
[0006]
In the UTOC area, management information such as a recording position of recording data in the user data area and the reproduction order thereof, a unique disk name for each MD, a unique track name for each track, and the like are written.
[0007]
In the UTOC area, a plurality of types of information are independently stored in units of sectors. The UTOC area is composed of 32 sectors, sector 0 to sector 31, but sector 0 to sector 4 are used in the MD device. Sector 0 stores the recording status of the track. Sector 1 stores a disk name or a track name written in ASCII code. Sector 2 stores the recording date of the disk or track. Sector 3 is not used in a recordable disc, but an MD barcode and an ISRC [International Standard Recording Code] of each track are stored in a pre-master disc and a hybrid disc. Sector 4 stores a disk name or a track name described in ISO-8859-1 or a shift JIS code.
[0008]
As described above, the MD apparatus can write an arbitrary disk name or track name in the UTOC area (sector 1 and sector 4) of the MD, which is very convenient for the user.
[0009]
The MD device can record and reproduce up to 255 songs using the data in the UTOC area, and can further connect and delete arbitrary songs by editing the data in the UTOC area.
[0010]
When an editing operation such as deletion, movement, name input or deletion by the user is performed, the MD device allocates parts by operating the data in the UTOC area without changing the data (music data) in the user data area. The data in the UTOC area is updated by changing or changing the assignment by dividing this part.
[0011]
At the time of recording by the MD device, the UTOC area is updated after the music data has been recorded in the user data area. The UTOC area updated in this way is updated and recorded in the UTOC area of the MD at the end of recording or before the disc is ejected or the power supply is stopped.
[0012]
This update recording of the UTOC area is extremely important. Particularly, if the recording in the sector 0 is incomplete, the edited contents and recording of the track performed so far are not correctly reflected in the data in the UTOC area of the MD. , Correct playback and new recording will not be possible. If the sectors 1 and 4 are incomplete, the name data cannot be read. If the sector 2 is incomplete, the recording date cannot be read.
[0013]
Therefore, in general, in order to check whether the update recording of the UTOC area has been performed correctly, the MD UTOC area is updated and recorded, and then the data in the MD UTOC area is read. If the read data is not normal, the MD UTOC is read again. Update recording to the area is performed.
[0014]
[Problems to be solved by the invention]
However, in order to confirm whether update recording to the UTOC area of the MD has been performed correctly, it takes a considerable time to read the data in the UTOC area of the MD again and collate all the data in the UTOC area. Also not efficient.
[0015]
The reason why a considerable amount of time is required for collation is that the UTOC area update data and the UTOC area data read out for confirmation are generally stored in a DRAM [Dynamic Ramdom Acess Memory], which is a shock-proof memory for storing music data. Stored in some area. However, because this DRAM area access method is often an access method that is inherently suitable for reading and writing music data, it is not an access method that is suitable for comparing and collating individual data. is there.
[0016]
On the other hand, as the simplest method for confirming whether the update recording of the UTOC area has been performed correctly, there is a method of confirming only whether or not there is an error in the read data in the re-reading of the UTOC area of the MD.
[0017]
In this method, if the optical pickup fails and the laser power does not come out, the UTOC area cannot be read from the MD normally, so that the abnormality of the optical pickup can be detected.
[0018]
If the optical pickup is normal but the recording head fails and no magnetic field is generated, the data will be erased when the UTOC area is updated and recorded. Since the data cannot be read, it is possible to detect an abnormality in the recording head.
[0019]
However, if the optical pickup breaks down and the laser power required for playback is output during playback, but the laser power required for recording is not output during recording, update recording data will be output due to insufficient laser power. Not recorded. However, the reading of the UTOC area from the disk for confirmation can be performed normally, and the read data remains as it was before being updated and recorded, and there is no error in the read data, so the abnormality cannot be recognized. There was a problem.
[0020]
In view of the above problems, an object of the present invention is to provide an information recording / reproducing apparatus capable of efficiently and reliably confirming whether update recording of the UTOC area has been correctly performed at the end of update recording of the UTOC area. And
[0021]
[Means for Solving the Problems]
To achieve the above object, in the information recording / reproducing apparatus according to the present invention, a recording medium having a main recording area in which recording data is written and a sub-recording area in which management information of the recording data is written. Read means for reading information on the sub recording area, first storage means for storing information on the sub recording area read by the reading means, and information on the sub recording area read by the reading means And a fourth storage means for storing the specific data therein, and a third storage means, and the information of the sub recording area read by the reading means is transferred from the first storage means to the third storage means In response to the write request, the information on the sub recording area stored in the third storage means is updated, and the updated information on the sub recording area is updated in the third recording section. Transferred to the first storage unit from the unit update Means, an update recording means for reading out information on the sub-recording area updated by the update means from the first storage means and writing it to the recording medium, and a sub-recording on the recording medium after writing by the update recording means. Confirmation reproducing means for reading information on the recording area, second storage means for storing information on the sub recording area read by the confirmation reproducing means, and information on the sub recording area updated by the updating means First determination means for determining whether or not all the specific data in the sub-recording area information stored in the fourth storage means match, and the first determination means determines that all match In this case, the information on the sub recording area updated by the updating means and the information on the sub recording area read by the confirmation reproducing means all match. The sub-recording area updated by the updating unit when it is determined that the information update recording of the sub-recording area has been normally performed and the first determination unit When the specific data in the information of the sub-recording area and the specific data in the information of the sub-recording area read by the confirmation reproducing means all match, it is determined that the information update recording of the sub-recording area has been normally performed. And a second determination means.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described below with reference to the drawings. Here, as an information recording / reproducing apparatus according to the present invention, an MD apparatus will be described as an example. FIG. 1 is a block diagram showing a configuration example of an MD apparatus according to the present invention.
[0025]
The MD 3 mounted on the MD device 1 is a recordable disc or a hybrid disc, which is an optical disc stored in a plastic cartridge, and is recorded or reproduced on a spiral track from the center.
[0026]
The MD apparatus 1 irradiates a laser beam from an optical pickup 4 to an MD 3 that is rotationally driven by a spindle motor 2 through an objective lens (not shown).
[0027]
By detecting the reflected light at this time by the optical pickup 4, the reproduction signal is read, amplified by the high frequency amplifier 5, and supplied to the encoder / decoder 6. The reproduction signal detection rate is 1.4 Mbit / s, which is the same as that of CD.
[0028]
The encoder / decoder 6 decodes EFM [Eight to forteen Modulation] and ACIRC [Advanced Cross Interleave Read Solomon Code] to convert the reproduction signal into compressed digital data, and decodes EFM and ADIP [Address In pregroove]. The address signal is extracted from the reproduction signal. The address signal is sent to a servo circuit 17 described later through the system controller 10. On the other hand, the compressed digital data is sent to the shock proof memory 8 via the shock proof memory controller 7. The shock proof memory 8 stores information on the TOC area of the MD3 and information on the UTOC area in addition to the music information in the user data area.
[0029]
The shock proof memory controller 7 manages a shock proof memory 8 which is a DRAM of several Mbits, temporarily stores the compressed digital data supplied from the encoder / decoder 6 in the shock proof memory 8, Data stored in the shock proof memory 8 is output to the audio decompression / compression circuit 9 in response to a request for each sound group from the compression circuit 9. When the shock-proof memory controller 7 outputs data for one sector, it notifies the system controller 10 that data for one sector is requested.
[0030]
The system controller 10 reads the TOC area information or UTOC information (hereinafter sometimes referred to as UTOC data) stored in the shock proof memory 8 through the shock proof memory controller 7 and reads the next sector. The encoder / decoder 6 is instructed. In response to this, the encoder / decoder 6 sends the data of the next sector to the shock proof memory controller 7.
[0031]
The voice decompression / compression circuit 9 performs an inverse conversion process of compression coding and demodulates 0.3 Mbit / s compressed digital data into full-bit digital voice data. The demodulated digital audio data is converted into analog audio data by the digital / analog conversion circuit 11 and output from the output terminal 12 to the outside.
[0032]
On the other hand, for recording on the MD 3, analog audio data is input to the input terminal 13, and the analog audio data is converted into digital audio data having a sampling rate of 44.1 kHz by the analog / digital conversion circuit 14.
[0033]
The audio decompression / compression circuit 9 performs encoding by an ATRAC [Adaptive Transform Acoustic Coding] method, converts the digital audio signal supplied from the analog / digital conversion circuit 14 into compressed digital data, and converts the compressed digital data into a shock proof memory. The data is sent to the encoder / decoder 6 via the controller 7 and the shock proof memory 8.
[0034]
The encoder / decoder 6 encodes the input compressed digital data into a serial magnetic field modulation signal and supplies it to the recording head drive circuit 15. The recording head drive circuit 15 moves the recording head 16 to a predetermined recording position on the MD 3 and generates a magnetic field corresponding to the magnetic field modulation signal. At this time, a laser beam is irradiated from the optical pickup 4 to a predetermined recording position on the MD 3, whereby a magnetization pattern corresponding to the magnetic field is formed on the MD 3.
[0035]
The serial signal amplified by the high frequency amplifier 5 and the address signal described above are input to the servo circuit 17. The servo circuit 17 sends a control signal to the driver circuit 18 in accordance with the input signal, and feedback-controls the rotational speed of the spindle motor 2 via the driver circuit 18. By such feedback control, the MD 3 can be rotated at a constant linear velocity.
[0036]
The servo circuit 17 also feedback-controls the rotational speed of the feed motor 19 via the driver circuit 18. By such feedback control, shift control of the optical pickup 4 with respect to the radial direction of the MD 3, that is, tracking control can be performed. Further, the servo circuit 17 also performs focusing control of the optical pickup 4 via the driver circuit 18.
[0037]
The optical pickup 4, the high-frequency amplifier 5, the encoder / decoder 6, the servo circuit 17, the driver circuit 18, and the like described above are supplied with power from a power supply circuit (not shown). All the UTOC data update record confirmation operations are centrally managed by the system controller 10. The system controller 10 includes a microcomputer, and includes a CPU, ROM, RAM, an I / O bus (not shown), and a memory 10a. This I / O bus includes an input device 20 for performing song name input, music selection operation, sound quality adjustment operation, and the like, a display device 21 for notifying (displaying) the operation state of the device, etc. An encoder / decoder 6 and a shock proof memory controller 7 are connected. The input device 20 includes a “record” key, a “song split” key, a “song composition” key, a “song move” key, a “single song erase” key, an “all song erase” key, a “name input” key, and a “ It has a “name erase” key and the like.
[0038]
In the present invention, internal processing of the system controller 20 (encoder / decoder 6, shock proof memory controller 7, and servo circuit 17) performed when confirming whether update recording of UTOC data to MD3 has been performed normally is performed. Control processing, key fetch processing from the input device 20, and display processing on the display device 21). Therefore, in the following, three embodiments of the UTOC data update record confirmation operation by the system controller 10 will be described with reference to FIGS.
[0039]
First, a first embodiment of the present invention will be described. FIG. 2 is an operation flowchart showing the first embodiment of the UTOC data update record confirmation operation by the system controller 10. In step S10, when MD3 is loaded, UTOC data is read from MD3. In step S20, the UTOC data read in step S10 is stored in the first memory area of the shop proof memory 8.
[0040]
In step S30, an editing operation (track division, track deletion, track synthesis, track name change) and music data recording operation on MD3 (hereinafter referred to as an editing operation, etc.) are performed by an input operation from the user. Done. At this time, the UTOC data stored in the first memory area of the shock proof memory 8 is updated (the updated UTOC data is referred to as UTOC update data).
[0041]
In step S40, it is determined whether or not there is an instruction for an end operation by an input operation from the user. Note that the ending operation refers to an MD3 replacement operation, a power-off operation, or the like.
[0042]
If there is no instruction for ending operation (No in step S40), it is determined whether there is an instruction for editing operation or the like by an input operation from the user (step S50). If there is an instruction such as an editing operation (Yes in step S50), the process proceeds to step S30. If there is no instruction such as an editing operation (No in step S50), the process proceeds to step S40.
[0043]
On the other hand, if there is an instruction for an ending operation (Yes in step S40), the specific data in the UTOC update data is read from the first memory area of the shock proof memory 8, and the specific data is transferred to the memory 10a. Save (step S60).
[0044]
In the subsequent step S70, the UTOC update data stored in the first memory area of the shock proof memory 8 is recorded in the UTOC area of MD3.
[0045]
Then, after the recording of the UTOC update data in the MD3 is completed, the UTOC data is read from the MD3 (step S80), and the read UTOC data is stored in the second memory area of the shock proof memory 8 (step S90).
[0046]
In the subsequent step S100, the specific data in the UTOC data is read from the second memory area of the shock proof memory 8 and compared with the specific data stored in the memory 10a.
[0047]
In step S110, it is determined whether all of the compared specific data matches. If all the specific data match (Yes in step S110), the operation ends after performing the end operation.
[0048]
On the other hand, if part or all of the compared specific data does not match (No in step S110), an error display is performed. Alternatively, returning to step S70, the UTOC update data is written again into the UTOC area of MD3, and an error is displayed for the first time when a part or all of the specific data does not match even if this write operation is performed a predetermined number of times. You may do it.
[0049]
By performing such processing, it is not necessary to collate all the UTOC data, so that the UTOC data update record confirmation operation can be performed efficiently. In addition, error detection is not performed only from UTOC data reproduced from MD3, but comparison is made with UTOC update data stored in memory 10a, so that optical pickup 4 is out of order and necessary for recording during recording. Even when a large laser power is not output, an error can be detected.
[0050]
In the first embodiment, the specific data in the UTOC update data is transferred from the first memory area of the shock proof memory 8 to the memory 10a in step S60. However, this transfer is not performed, and in step S100, the shock proof memory 8 is transferred. The specific data in the UTOC update data is read from the first memory area, the specific data in the UTOC data is read from the second memory area of the shock proof memory 8, and the read specific data are compared with each other. Also good. However, in this process, it is necessary to transfer specific data from both the first memory area and the second memory area of the shock proof memory 8 to the system controller 10, so that the specific data is obtained only from the first memory area of the shock proof memory 8. The processing time is longer than the processing shown in the flowchart of FIG.
[0051]
Next, a second embodiment of the present invention will be described. FIG. 3 is an operation flowchart showing a second embodiment of the UTOC data update record confirmation operation by the system controller 10. In FIG. 3, the same steps as those in FIG. 2 are denoted by the same reference numerals and description thereof is omitted.
[0052]
After executing the processes of steps S10 to S20, the process proceeds to step S25. In step S25, the UTOC data stored in the first memory area of the shop proof memory 8 is transferred to the memory 10a and stored in the memory 10a.
[0053]
In the subsequent step S35, an editing operation (track division, track deletion, track synthesis, track name change) and music data recording operation on MD3 (hereinafter referred to as an editing operation, etc.) are performed by an input operation from the user. Is done. At this time, the UTOC data stored in the memory 10a is updated (the updated UTOC data is referred to as UTOC update data). Then, after executing the processing of steps S40 to S50, the process proceeds to step S65.
[0054]
In step S65, the UTOC update data stored in the memory 10a is transferred to the first memory area of the shop proof memory 8, and the data stored in the first memory area of the shop proof memory 8 is rewritten from UTOC data to UTOC update data. . Then, after executing the processing of steps S70 to S90, the process proceeds to step S105.
[0055]
In step S105, the specific data in the UTOC data is read from the second memory area of the shock proof memory 8, the specific data in the UTOC update data is read from the memory 10a, and the read specific data are compared with each other. Then, the process of step S110-S120 is performed.
[0056]
By performing such processing, it is not necessary to collate all the UTOC data, so the UTOC data update record confirmation operation can be performed efficiently. In addition, error detection is not performed only from UTOC data reproduced from MD3, but comparison is made with UTOC update data stored in the memory 10a. Even when the laser power is not output, an error can be detected.
[0057]
Furthermore, since the UTOC update data is created in the memory 10a inside the system controller 10 unlike the first embodiment, the UTOC data update process can be performed in a shorter time in the second embodiment than in the first embodiment. . In the first embodiment, the specific data in the UTOC update data is transferred from the first memory area of the shock proof memory 8 to the memory 10a after the end operation is instructed, whereas in the second embodiment, the end operation is performed. After the instruction, the UTOC update data is transferred from the memory 10 a to the first memory area of the shock proof memory 8. In the first embodiment, since it takes time to read specific data in the UTOC update data from the first memory area of the shock proof memory 8, the second embodiment is more confirming the UTOC data update record than the first embodiment. The operation can be performed in a short time.
[0058]
In the second embodiment, the specific data in the UTOC data is read from the second memory area of the shock proof memory 8 in step S105, the specific data in the UTOC update data is read from the memory 10a, and the read specific data is read out. Compared with each other, instead of such processing, the specific data in the UTOC data is read from the second memory area of the shock proof memory 8, and the UTOC update data is read from the first memory area of the shock proof memory 8. The specific data may be read out and the read specific data may be compared with each other. However, in this process, since it is necessary to transfer specific data from both the first memory area and the second memory area of the shock proof memory 8 to the system controller 10, the specific data is obtained only from the second memory area of the shock proof memory 8. The processing time is longer than the processing shown in the flowchart of FIG.
[0059]
Next, a third embodiment of the present invention will be described. FIG. 4 is an operation flowchart showing a third embodiment of the UTOC data update record confirmation operation by the system controller 10. In FIG. 4, the same steps as those in FIG.
[0060]
After executing the processes of steps S10 to S20, the process proceeds to step S25. In step S25, the UTOC data stored in the first memory area of the shop proof memory 8 is transferred to the third memory area of the memory 10a and stored in the memory 10a.
[0061]
In the subsequent step S27, the specific data in the UTOC data is read from the third memory area of the memory 10a, and the specific data is transferred to the fourth memory area of the memory 10a and stored. Then, after executing the processes of steps S35 to S90, the process proceeds to step S95.
[0062]
In step S95, the specific data in the UTOC change data is read from the third memory area of the memory 10a, the specific data of the UTOC data before the change is read from the fourth memory area of the memory 10a, and the read specific data are compared with each other. By doing so, it is determined whether or not the specific data has changed due to the update of the UTOC data.
[0063]
If there is a change in the specific data due to the update of the UTOC data (Yes in step S95), the specific data in the UTOC data is read from the second memory area of the shock proof memory 8, and the UTOC update data is read from the third memory area of the memory 10a. The specific data is read out, and the read specific data are compared with each other (step S107). Then, the process of step S110-S120 is performed.
[0064]
On the other hand, if there is no change in the specific data due to the update of the UTOC data (No in step S95), the UTOC data is read from the second memory area of the shock proof memory 8, and the UTOC update data is read from the third memory area of the memory 10a. All the read data are compared (step S130). In a succeeding step S140, it is determined whether all of the data match. If all the data match (Yes in step S140), the operation ends after performing the end operation. If all the data do not match (No in step S140), the process of step S120 is performed.
[0065]
By performing such processing, it is not necessary to collate all the UTOC data, so the UTOC data update record confirmation operation can be performed efficiently. In addition, error detection is not performed only from UTOC data reproduced from MD3, but comparison is made with UTOC update data stored in the memory 10a. Even when the laser power is not output, an error can be detected.
[0066]
Furthermore, since the UTOC update data is created in the memory 10a inside the system controller 10 unlike the first embodiment, the third embodiment can update the UTOC data in a shorter time than the first embodiment. . In the first embodiment, the specific data in the UTOC update data is transferred from the first memory area of the shock proof memory 8 to the memory 10a after the end operation is instructed. In the third embodiment, the end operation is performed. After the instruction, the UTOC update data is transferred from the memory 10 a to the first memory area of the shock proof memory 8. In the first embodiment, since it takes time to read the specific data in the UTOC update data from the first memory area of the shock proof memory 8, the third embodiment is performed when there is a change in the specific data due to the update of the UTOC data. In this case, the UTOC data update record confirmation operation can be performed in a shorter time than in the first embodiment.
[0067]
In addition to the above effects, in the third embodiment, when there is no change in specific data due to the update of the UTOC data, the update recording is normally performed by comparing all the data of the UTOC update data and the confirmed and reproduced UTOC data. Therefore, the reliability of the UTOC data update record confirmation operation is improved.
[0068]
In the third embodiment, a fifth memory area is provided in the memory 10a, and instead of the process of step S130, UTOC data is transferred from the second memory area of the shock proof memory 8 to the fifth memory area of the memory 10a. The UTOC data may be read from the fifth memory area of the memory 10a, the UTOC update data may be read from the third memory area of the memory 10a, and all the read data may be compared to reduce the comparison processing time. .
[0069]
In the third embodiment, data is read from the second memory area of the shock proof memory 8 and the third memory area of the memory 10a in steps S107 and S130. Instead of such processing, the data of the shock proof memory 8 is read. Data may be read from the first memory area and the second memory area. However, in this process, since it is necessary to transfer data from both the first memory area and the second memory area of the shock proof memory 8 to the system controller 10, the data is only sent from the first memory area of the shock proof memory 8 to the system. The processing time is longer than the processing shown in the flowchart of FIG.
[0070]
The data that should be used as the specific data in the UTOC data update record confirmation operation by the system controller 10 described above will be described below.
[0071]
First, the structure of sector 0 in the UTOC area will be described. Sector 0 includes a header portion, an area indicating the first music number (First TNO), an area indicating the last music number (Last TNO), a buffer area, and a P-EMPTYTY [Pointer for the first empty slot on the parts table], P-FRA [Pointer for the start address of the freely recordable area] serving as the first pointer area, and 255 track data areas P-TNON [Pointer for the start address serving as the second pointer area] of track n] (n is a natural number of 1 to 255) and 255 part data areas (section descriptors).
[0072]
The header portion stores a sector sync, a sector address, and the like. The sector sync is a data pattern for determining the start position of the sector.
[0073]
When First TNO is 0, it indicates a blank disc, and when it is 1, it indicates that at least one song is recorded. In the case of a hybrid disk, this may not be 1.
[0074]
When Last TNO is 0, it indicates a blank disc, and when it is 1 or more, it indicates that the number of songs is recorded.
[0075]
The buffer area is intended to prevent a recording / playback failure or the like, and is filled with NULL (0).
[0076]
The P-EMPTY centrally manages the end-use part data area and stores pointer information indicating the head of the unused part data area. That is, the first unused part data number is stored. When there are a plurality of unused part data areas, all unused part data areas belong to P-EMPTY by being linked by Link-P. Then, parts that have been deleted by editing work or the like and become less than 6 clusters are managed as unusable by this P-EMPTY.
[0077]
The P-FRA manages a part data area indicating an unrecorded part or a deleted part in the user data area, and stores pointer information indicating the head of the part data area corresponding to the reusable area. That is, the first part data number in the part data area corresponding to an unrecorded part or deleted part having six or more clusters is stored here. When there are a plurality of such part data areas, all such part data areas belong to P-FRA by being linked by Link-P.
[0078]
The track data areas P-TNO1 to P-TNO255 are pointer areas for managing each track. The user data area manages the parts where data is effectively recorded, and each track data area includes each track ( The number of the part data area corresponding to the first part of the song) is stored. When there are a plurality of parts, the part data areas corresponding to each part are linked by Link-P, so that all of such part data areas belong to the track data area.
[0079]
The part data area is a section descriptor (PART Descriptor) for indicating a part (section) on the disc. In this part data area, addresses on the disk of each part constituting the song and Link-P are stored. The contents of the address are the start address in the user data area on the disk and the end address in the user data area on the disk.
[0080]
Link-P is called a “link pointer” and is a pointer that points to the next part data area. If there is a subsequent part data area in the song, the number of the part data area ( Pointer) is stored. Conversely, when there is no subsequent part data area, that is, in the case of the last part data area, 0 is written.
[0081]
Each part data area is linked to one of P-EMPTY, P-FRA, and each track data area. That is, the part data area corresponding to the empty part is also linked to either P-FRA or P-EMPTY. In the case of a blank disc, only the first part data area is linked to the area indicating P-FRA, and all other part data areas are linked to P-EMPTY.
[0082]
Next, the structure of sector 1 in the UTOC area will be described. Sector 1 has a header part, a buffer area, P-EMPTY, 255 track data areas P-TNNA [Pointer for the track name table] (n is a natural number from 1 to 255), and 256 names. And a data area. Note that the description of the area having the same name and the same role as the area of the sector 0 is omitted.
[0083]
The P-EMPTY of sector 1 manages the end use name data area centrally and stores pointer information indicating the head of the unused name data area. That is, the first unused name data number is stored. When there are a plurality of unused name data areas, all the unused name data areas belong to P-EMPTY by being linked by Link-P. Then, the slot area of the name data area deleted by editing work or the like is managed by this P-EMPTY as an unused name data area.
[0084]
The track data area of sector 1 is a pointer area for managing each track, and each track data area stores a slot area number corresponding to the first slot of the name data of each track (song).
[0085]
The name data area stores disk name and track name data and Link-P. When one name data does not fit in one name data area, the number (pointer) of the next name data area is stored in Link-P. Conversely, if there is no name data area that continues next, that is, if it corresponds to the last name data area, 0 is written in Link-P.
[0086]
Next, the structure of sector 2 in the UTOC area will be described. Sector 2 includes a header portion, a buffer area, P-EMPTY, 255 track data areas P-TRD n [Pointer for the recording date and time of TNO n] (n is a natural number of 1 to 255), 256 Recording date and time data areas. Note that the description of the area having the same name and the same role as the area of the sector 0 is omitted.
[0087]
The P-EMPTY of sector 2 manages the unused recording date / time data area in an integrated manner, and stores pointer information indicating the head of the recording date / time data area. That is, the number of the first unused recording date / time data area is stored. When there are a plurality of unused recording date / time data areas, they are linked by Link-P, and the plurality of unused areas belong to P-EMPTY.
[0088]
The track data area of sector 2 is a pointer area for managing each track, and each track data area stores a slot area number corresponding to the recording date / time slot of each track (song).
[0089]
The recording date / time data area includes the recording date / time data of the disc or one piece of music, the “Maker code” assigned to the manufacturer of the MD device when the song was recorded, and the “Model code” assigned to the MD device itself. Is stored.
[0090]
Next, the structure of the sector 4 in the UTOC area will be described. Sector 4 includes a header part, a buffer part, Char. code, P-EMPTY, 255 track data areas P-TNNA [Pointer for the track name table] (n is a natural number from 1 to 255), and 256 name data areas. Note that the description of the area having the same name and the same role as the area of the sector 0 is omitted.
[0091]
Char. The code stores a character code of name data handled in the sector 4 (a code for identifying ISO-8859-1 or shift JIS code).
[0092]
The P-EMPTY of sector 4 manages the unused name data area centrally, and stores pointer information indicating the head of the unused name data area. That is, the number of the first unused name data area is stored. When there are a plurality of unused name data areas, they are linked by Link-P, and a plurality of unused name data areas belong to P-EMPTY.
[0093]
The track data area of sector 4 is a pointer area for managing each track, and each track data area stores a slot area number corresponding to the first slot of the name data of each track (music).
[0094]
The name data area of sector 4 stores disk name and track name data and Link-P. When one name data does not fit in one name data area, the number (pointer) of the next name data area is stored in Link-P. Conversely, if there is no name data area that continues next, that is, if it corresponds to the last name data area, 0 is written in Link-P.
[0095]
Since other sectors are not directly related to the selection of specific data, description thereof is omitted.
[0096]
Next, the data value setting for each sector when the MD is an unrecorded disk will be described. If the MD is an unrecorded disk, no valid data can be formed because no normal data is recorded even if the MD device attempts to read data from the disk. Accordingly, when it is determined that the disc is an unrecorded disc, the MD device sets an initial value of the data value of each sector. An example of this initial value will be described below.
[0097]
For sector 0, since the number of recorded songs is 0, “First TNO” = 00h (h represents a hexadecimal number, the same applies hereinafter), “Last TNO” = 00h, and “P-TN1” to “P-TNO255”. = 00h. The area where the music data can be recorded is normally the entire user data area, and “P-FRA” = 01h is assigned to indicate the part data area. “P-EMPTY” is set to 02h, and parts other than the part data area connected to P-FRA are sequentially connected by Link-P. That is, Link-P of the part data area indicated by “P-EMPTY” = 02h indicates the next part data area with “Link-P” = 03h, and indicates a Link-P value indicating each part data area in sequence. The link-P of the last part data area is set to “Link-P” = 00h to indicate the final.
[0098]
Since there is no name data for sector 1, “P-TNA1” to “P-TNA255” = 00h, the name data areas are all unused areas, “P-EMPTY” = 00h, and the link of the name data area -P includes a Link-P value indicating each sequential name data area, and Link-P of the last name data area is "Link-P" = 00h, indicating that it is the last.
[0099]
Since there is no recording date / time data for sector 2, “P-TDRD1” to “P-TDRD255” = 00h, and since all the recording date / time data areas are unused areas, “P-EMPTY” = 00h and recording date / time data area In the Link-P, a Link-P value indicating each sequential recording date / time data area is entered, and the Link-P of the last recording date / time data area indicates that “Link-P” = 00h is the last. .
[0100]
Since there is no name data for sector 4 as well, “P-TNA1” to “P-TNA255” = 00h, the name data areas are all unused areas, and “P-EMPTY” = 00h. Link-P includes a Link-P value indicating each sequential name data area, and the Link-P of the last name data area indicates that “Link-P” = 00h is the last.
[0101]
The initial value data is also set as UTOC update data when all tracks (songs) are erased and all name data and all recording dates and times are erased by the “all erase” key.
[0102]
Then, editing of tracks (songs) in MD, such as erasing and moving, can be done by changing the part assignment or dividing this part by operating the data in the UTOC area without changing the user data area (music data). This part data area is consumed every time MD recording or editing is performed.
[0103]
Hereinafter, examples of UTOC update data created in various recording and editing operations will be described, and data that is likely to be updated as UTOC data will be described.
[0104]
First, sector 0 when one piece of music is recorded on an unrecorded disk will be described. One song is recorded in the initial state described above. Recording of music data starts from the user data area corresponding to the address (usually 0032c100sc00sg) indicated in the part data area indicated by “P-FRA” = 01h, and the address of the first music (TNO = 1) is “ It is assumed that “Start Address”. The address at which the recording is ended by the key input of the recording end instruction is set to “END Address” of the first song (TNO = 1). The address information is registered at the head of the unused part data area indicated by “P-EMPTY” = 02h. If there is one recording part for the first song, “Link-P” = 00h. As a result, one unused part data area is consumed, so “P-EMPTY” representing the head of the last used part data area is updated to “03h” one after. P-TNO is updated to “P-TNO” = 01h to indicate the part data area in which the address information of the first song is stored. Recording one piece of music data consumes a part from the beginning of the unrecorded data area of the user data area. Therefore, the first address of the unit suitable for recording after the “END Address” of the first song (expressed as “A2”) Is updated as the “Start Address” value of the part data area indicated by “P-FRA”. “First TNO” is set to 01h, and “Last TNO” is also set to 01h.
[0105]
Thereafter, each time one song is recorded, the part data of the song is registered at the location indicated by “P-EMPTY”, and the unrecorded data area of the consumed user data area is corrected to indicate the part data indicated by “P-FRA”. Update as the “Start Address” value for the region. In the track data area, the pointer value for the additional recording music is updated, and “P-EMPTY” and “Last TNO” are also updated.
[0106]
Next, as an example, the case where four pieces of music have already been recorded in the MD will be described as an example, and the UTOC data update status of the sector 0 when various edits are performed will be described. The following description will be made on the assumption that the MD user data area is composed of four songs and the second song has two parts.
[0107]
In sector 0, the area “First TNO” indicating the first music number stores 01h, the area “Last TNO” indicating the last music number stores 04h, and the track data area “P-TNO1” stores 02h. The track data area “P-TNO2” stores 03h, the track data area “P-TNO3” stores 04h, and the track data area “P-TNO4” stores 05h.
[0108]
“P-TNO1” = 02h in the track data area indicates the number of the second part data area from the top, “P-TNO2” = 03h in the track data area indicates the number of the third part data area from the top, “P-TNO3” = 04h in the track data area indicates the number of the fourth part data area from the head, and “P-TNO4” = 05h in the track data area indicates the number of the fifth part data area from the head. Yes.
[0109]
The second part data area from the beginning corresponds to the first song in the user data area, the third part data area from the beginning corresponds to the second song in the user data area, and the sixth part data from the beginning in Link-P. Concatenate regions.
[0110]
The sixth part data area from the beginning indicates that it is the second part data area of the second song connected by Link-P of the third part data area from the beginning. The fourth part data area from the top corresponds to the third music, and the fifth part data area from the top corresponds to the fourth music. The eighth part data area from the beginning is stored in P-EMPTY, and the ninth to 255th part data areas from the beginning are connected by Link-P and belong to the area indicated by P-EMPTY. The first part data area from the top corresponds to the deleted part and is stored in the area indicating P-FRA, and the seventh part data area from the top corresponds to the deleted part and is linked by Link-P and connected to P -Belongs to the area indicating FRA.
[0111]
The situation of updating the UTOC data in sector 0 when the third piece of MD music is divided into two will be described.
[0112]
First, since the number of songs increases by one at the song division point, the “Last TNO” value is changed from 04h to 05h. Also, the music to be divided (TNO = 3) is divided into two, TNO = 3 and TNO = 4, and the music from the divided music to “Last TNO” is incremented by one. Therefore, P-TNO n from P-TNO 4 to “Last TNO” in the track data area sequentially copies the previous data. That is, the value 05h of P-TNO4 is copied to P-TNO5 corresponding to “Last TNO” after division. In the case of this example, since the music to be divided is immediately before “Last TNO” = 04h, the data copy in the track data area corresponding to the increase in the number of music mentioned above sets the value 05h of P-TNO4 to P-TNO5. It ends with one copy.
[0113]
The data of the third music is in the fourth part data area from the beginning because P-TNO3 = 04h of the track data area in the state before the music division. Since this song is divided into two at the dividing points, separate track data areas and parts data areas are required. For this purpose, the part data area is the eighth part data area from the beginning from 08h indicated by “P-EMPTY”. Since the first half of the division point from TNO = 3 is TNO = 3 as it is, the conventional track data area P-TNO3 and the fourth part data area from the beginning are used as they are, but END Address is the division point. To.
[0114]
In the latter half from the division point of TNO = 3, the new TNO = 4 as the music number, and one P-TNO4 in the track data area is used from 08h indicated by “P-EMPTY”. Therefore, the eighth part data area from the top is used, Start address sets the next address value of the division point, and End address sets END address of TNO = 3 before division.
[0115]
Since one 8th part data area from the beginning that was an unused area was used, “P-EMPTY” is 09h written in “Link-P” of the 8th part data area before division. The contents of “P-EMPTY” after division are used. Since there is one part data of TNO = 4 after the division, “Link-P” = 00h of the eighth part data area after the division is set.
[0116]
The creation of UTOC update data by music division is completed as described above. In this case, the updated data is “Last TNO”, “P-EMPTY”, and address values of the part data area before and after the music division point.
[0117]
Next, when the MD has already recorded 4 songs and the 2nd song has 2 parts, the UTOC data of sector 0 when the 2nd song (TNO = 2) of MD3 is deleted The update status will be described.
[0118]
Since the number of songs decreases by one song deletion, first, P-TNON in the track data area is updated. Since one song of TNO = 2 is erased, TNO = 3 before erasure becomes TNO = 2 after erasure, and TNO = 4 before erasure becomes TNO = 3 after erasure. Therefore, the value 04h of the next P-TNO3 is copied to P-TNO2, and the value 05h of the next P-TNO4 is copied to P-TNO3. Since P-TNO4 corresponding to “Last TNO” = 04h before erasure disappears, the data is updated to 00h. Then, “Last TNO” is decreased by one and updated to 03h.
[0119]
Next, the erased part data area of TNO = 2 is updated. Since the part data area indicated by “P-TNO2” = 03h of TNO = 2 before erasure is part data of the erased music, it is not necessary for music registration, but if the part length of the music erased part is 6 clusters or more If there is, it is necessary to register this as an unrecorded data area. If it is less than 6 clusters, there is nothing to do with the part data, and it is only necessary to register the part data area as an unused part data area.
[0120]
A case will be described in which the lengths of the parts of the music erasure part are each less than 6 clusters. In order to register in the unused part data area, the third part data area from the head and the sixth part data area from the head corresponding to the erased music are linked to “P-EMPTY” by “Link-P”. . That is, “Link-P” at the end of the unused part data area is set to the value “08h” of “P-EMPTY” before erasure, and is linked to the head of the unused part data area before erasure, and newly unused part data is newly created. The registration number (03h in this case) of the first data area registered in the area is set to the value of “P-EMPTY”.
[0121]
Next, the case where the lengths of the parts of the music erasure part are each 6 clusters or more will be described. In order to register in the unrecorded data area, the third part data area from the head and the sixth part data area from the head corresponding to the erased music are linked to “P-FRA” and “Link-P”. That is, “Link-P” at the end of the unrecorded data area is set to the value “01-h” of “P-FRA” before erasure, is linked to the head of the unrecorded data area before erasure, and is newly registered in the unrecorded data area The registration number (03h in this case) of the first data area to be set is set to the value of “P-FRA”.
[0122]
If one of the parts in the song erasure part is 6 clusters or more and the other is less than 6 clusters, each part data area must be divided into an unrecorded data area and an unused part data area, The description is omitted here.
[0123]
This completes the update of the UTOC data by erasing the song. In this case, the updated data is “Last TNO”, “P-TNON”, “P-EMPTY” or “P-FRA” after the erased song. And “Link-P” in the parts data area of the erased music.
[0124]
Next, when the MD has already recorded 4 songs and the 2nd song has 2 parts, the 3rd song (TNO = 3) and the 4th song (TNO = 4) of MD3 were synthesized. The update status of the UTOC data in sector 0 will be described.
[0125]
Since the number of songs is reduced by one by the song composition, first, P-TNOn in the track data area is updated. Since TNO = 3 and TNO = 4 are synthesized, TNO = 4 before synthesis is the latter half of TNO = 3 before synthesis. Since the song numbers up to “Last TNO” are decremented one by one, the value of the next P-TNO n + 1 is copied to P-TNON as in the case of erasing one song. In this example, since the song “Last TNO” is the object of synthesis, it is only necessary to change the value of P-TNO4 before synthesis from 05h to 00h, and there is no need to copy adjacent P-TNO n. “Last TNO” is reduced by one to 03h.
[0126]
Next, the synthesized part data area of TNO = 3 and TNO = 4 is updated. By synthesis, TNO = 3 before synthesis becomes the first half of the new TNO = 3, and TNO = 4 before synthesis becomes the second half of the new TNO = 3. Since the part data area indicated by “P-TNO4” = 05h of TNO = 4 before composition is part data of the latter half of the composition music, it is necessary to connect to the first half music of new TNO = 3, that is, TNO = 03 before composition. That is, 05h indicating the part data area of TNO = 4 before composition is set in “Link-P” of the part data area of TNO = 3 before composition.
[0127]
If the user data areas of two songs to be synthesized are adjacent, the two parts data can be combined into one. That is, the new “Start address” of TNO = 3 is “Start address” of TNO = 3 before synthesis, and the “End address” of new TNO = 3 is “End address” of TNO = 4 before synthesis. Become. In this case, since the part data area is expressed by one, the fifth part data area from the top used by TNO = 4 before synthesis is unnecessary, so the value of “P-EMPTY” is set to 05h, “Link-P” in the fifth part data area from the beginning is connected to the unused data area by setting the value of “P-EMPTY” before synthesis.
[0128]
This completes the update of the UTOC data by song composition. In this case, the updated data is “Last TNO”, “P-TNO n” or “P-EMPTY” or the latter half of the composition in the latter half of the composition. “Link-P” in the part data area of the song.
[0129]
In the examples so far, the sector 0 in the UTOC area has been mainly described. However, update examples of the sector 1 and the sector 4 that handle the name data of the disk name and the track name and the sector 2 that handles the recording date / time data will be described below.
[0130]
Sector 1 and sector 4 differ only in the presence or absence of the “char.code” part, so only sector 1 will be described.
[0131]
The update state of the UTOC data in sector 1 when inputting 13-byte character data as a disk name to an unrecorded disk and 17-byte character data as a track name to the first song (TNO = 1) will be described.
[0132]
When the disk name is input first, the name data area of the disk name is always determined so that the head is the first name data area from the head, so the name data of the disk name is the first name from the head. 7 bytes are stored from the data area. When the name data of the disc name exceeds 7 bytes, the next name data area is concatenated and stored by “Link-P”. In this case, since the disk name is 13-byte character data, the storage is completed from the top to the second name data area. At this time, the value of “Link-P” in the second name data area from the head is set to “P-EMPTY”, and the head of the unused name data area is updated by the amount used for name data registration. In addition, the value of “Link-P” in the second name data area from the top is set to 00h to indicate the end of the name data of the disk name. Further, the end of the name data of the disk name is also indicated by storing NULL data 00h at the end of the name data of the disk name.
[0133]
Next, when 17-byte character data is input as the track name to the first song (TNO = 1), the data is stored from the third name data area from the top in accordance with the previously updated value of “P-EMPTY”. Data indicating the storage start location is stored in “P-TNA1” of the track data area so that the name data of the track name of the first song (TNO = 1) can be read.
[0134]
Here, since 17-byte character data is input as the name data of the track name, the storage is completed in three areas from the third name data area from the beginning to the fifth name data area from the beginning. At that time, the value of “Link-P” of the fifth name data area from the head which is the last name data area is set to “P-EMPTY”, and the head of the unused name data area is used for name data registration. In addition, the value of “Link-P” in the fifth name data area from the top is set to 00h to indicate the end of the track name name data. The end of the track name name data is also indicated by storing NULL data 00h at the end of the track name name data.
[0135]
The update of the UTOC data by the name input is completed as described above. In this case, the updated data includes “P-EMPTY” of the song whose name is input “P-TNNA” and “Link-P” in the name data area. And so on.
[0136]
Next, the update status of the UTOC data in sector 1 when recording the disc recording date and time and the track recording date and time of TNO = 1 and TNO = 2 on an unrecorded disc will be described.
[0137]
When the disc recording date / time is input first, the recording date / time data area of the disc recording date / time is always determined to be the first recording date / time data area from the beginning. It is stored in the first recording date / time data area from the beginning. Since the recording date / time data is always 6 bytes, it is not connected to the next recording date / time data area by “Link-P”.
[0138]
Also, the disc recording date and time is usually not input alone, and is automatically recorded according to a clock built in the MD device, for example, when some recording or editing is performed on the MD. Also, at the end of the disc recording date and time data, “Maker code” assigned in advance to the manufacturer of the MD device and “Model code” assigned in a method predetermined for each device within the manufacturer are simultaneously recorded. It is supposed to be.
[0139]
Next, a case where the track recording date / time is input will be described. The track recording date and time is always 6 bytes as with the disk recording date and time, and the above-mentioned “Maker code” and “Model code” are recorded. The track recording date and time is not normally input alone, but is automatically recorded according to a clock built in the MD device, for example, when the song is recorded.
[0140]
As described above, since the track recording date / time data is always 6 bytes, there is no need to use a plurality of recording date / time data areas in one song. Since there are 255 areas, there is no need to worry about the existence of unused recording date / time data areas. That is, the recording date and time of TNO = 1 may be recorded in the second recording date and time data area from the top. If the recording date / time is input at TNO = 255, the recording date / time may be recorded in the 256th recording date / time data area. In the track data area, data corresponding to the TNO value indicating the recording date / time data area is set only in “P-TRD n” corresponding to the TNO to which the recording date / time is input. Set to 00h.
[0141]
“P-EMPTY” indicates the beginning of the unused recording date / time data area. In this case, the number is the smallest of the song numbers (TNO) for which the recording date / time is not input (00h if the disc recording date / time is not input), and recording is performed sequentially. If the TNO value in which the date / time is not input is set to “Link-P” and linked, those belonging to the unused recording date / time data area can be linked.
[0142]
Thus, the update of the UTOC data by inputting the recording date and time is completed. In this case, the updated data is “P-TRD n” or “P-EMPTY”.
[0143]
In this way, data that is highly likely to be updated can be selected by updating the UTOC data by various recordings and editing. For example, “P-FRA of sector 0 of UTOC area”, “P-EMPTY of sector 0 of UTOC area”, “Start address of FRA of sector 0 of UTOC area”, “Last TNO of sector 0 of UTOC area”, “ Specifics used in the above-described first to third embodiments such as “P-EMPTY of sector 1 of UTOC area”, “P-EMPTY of sector 2 of UTOC area”, “P-EMPTY of sector 4 of UTOC area”, etc. Select as data.
[0144]
The present invention does not limit the specific data to only the data picked up above. Further, the type and number of data taken up as specific data are not limited. The specific data may be any data that can confirm whether the UTOC update recording has been normally performed without checking all the data of the UTOC data. However, the capacity of the storage means for storing the specific data and the specific data are not limited. In view of shortening the processing time of the process of comparing the above, it is possible to confirm efficiently with the above selection data.
[0145]
In the first to third embodiments described above, the case where the present invention is applied to an MD apparatus has been described as an example, but the application target of the present invention is not limited to this, and various It can be applied to an information recording / reproducing apparatus.
[0146]
【The invention's effect】
As described above, the information recording / reproducing apparatus according to the present invention provides the sub recording area for a recording medium having a main recording area in which recording data is written and a sub recording area in which management information of the recording data is written. Reading means for reading out the information, first storage means for storing information on the sub-recording area read by the reading means, and specific data in the information on the sub-recording area read by the reading means And a third storage means for transferring the information of the sub-recording area read by the reading means from the first storage means to the third storage means for writing request. In response, the information of the sub recording area stored in the third storage means is updated, and the updated information of the sub recording area is updated from the third storage means to the third storage means. It is transferred to the storage means update Means, an update recording means for reading out information on the sub-recording area updated by the update means from the first storage means and writing it to the recording medium, and a sub-recording on the recording medium after writing by the update recording means. Confirmation reproducing means for reading information on the recording area, second storage means for storing information on the sub recording area read by the confirmation reproducing means, and information on the sub recording area updated by the updating means First determination means for determining whether or not all the specific data in the sub-recording area information stored in the fourth storage means match, and the first determination means determines that all match In this case, the information on the sub recording area updated by the updating means and the information on the sub recording area read by the confirmation reproducing means all match. The sub-recording area updated by the updating unit when it is determined that the information update recording of the sub-recording area has been normally performed and the first determination unit When the specific data in the information of the sub-recording area and the specific data in the information of the sub-recording area read by the confirmation reproducing means all match, it is determined that the information update recording of the sub-recording area has been normally performed. And a second determination means.
[0147]
By adopting such a configuration, it is not necessary to collate all data in the sub recording area, so that the data update recording confirmation operation in the sub recording area can be performed efficiently. Further, the information update recording of the sub recording area is performed by comparing the specific data in the information of the sub recording area updated by the updating means and the specific data in the information of the sub recording area read by the confirmation reproducing means. Therefore, it is possible to detect an error even in a failure mode in which the recording medium can be read and cannot be written.
[0149]
Also, The time for reading the specific data can be shortened. Therefore, the information update recording confirmation operation for the sub recording area can be performed in a short time.
[0151]
Also, When there is no change in the specific data due to the update of the information of the sub recording area, the information of the sub recording area updated by the updating means and the information of the sub recording area read by the confirmation reproducing means are all compared. It is determined whether the information update recording in the sub recording area has been normally performed. As a result, the reliability of the information update recording confirmation operation in the sub recording area is improved.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration example of a mini-disc recording / reproducing apparatus according to the present invention.
FIG. 2 is an operation flowchart showing a first embodiment of a UTOC data update record confirmation operation by a system controller.
FIG. 3 is an operation flowchart showing a second embodiment of the UTOC data update record confirmation operation by the system controller.
FIG. 4 is an operation flowchart showing a third embodiment of the UTOC data update record confirmation operation by the system controller.
[Explanation of symbols]
1 Mini-disc recording / playback device
2 Spindle motor
3 Minidisc
4 Optical pickup
5 High frequency amplifier
6 Encoder / Decoder
7 Shockproof memory controller
8 Shockproof memory
9 Audio decompression / compression circuit
10 System controller
10a memory
11 Digital / analog converter
12 output terminals
13 Input terminal
14 Analog / digital converter
15 Recording head drive circuit
16 Recording head
17 Servo circuit
18 Driver circuit
19 Feed motor

Claims (1)

Read means for reading information on the sub-recording area with respect to a recording medium having a main recording area in which recording data is written and a sub-recording area in which management information of the recording data is written;
First storage means for storing information of the sub-recording area read by the reading means;
Fourth storage means for storing specific data in the information of the sub-recording area read by the reading means;
And a third storage means for transferring information of the sub-recording area read by the reading means from the first storage means to the third storage means, and in response to a write request to the third storage means Updating means for updating the stored information of the sub-recording area and transferring the updated information of the sub-recording area from the third storage means to the first storage means;
Update recording means for reading out information on the sub-recording area updated by the update means from the first storage means and writing it to the recording medium;
Confirmation reproduction means for reading out information of the sub-recording area from the recording medium after writing by the update recording means;
Second storage means for storing information of the sub-recording area read by the confirmation reproducing means;
A process for determining whether the specific data in the information on the sub recording area updated by the updating means and the specific data in the information on the sub recording area stored in the fourth storage means all match. 1 determination means;
When it is determined by the first determination means that all match, the information in the sub recording area updated by the updating means and the information in the sub recording area read by the confirmation reproducing means all match When it is determined that the information update recording of the sub-recording area has been normally performed, and the first determining unit determines that the information does not match partly or entirely, the information of the sub-recording area updated by the updating unit When the specific data in the sub-recording area and the specific data in the information in the sub-recording area read by the confirmation reproducing means all coincide with each other, it is determined that the information recording in the sub-recording area has been normally performed. 2 determination means;
An information recording / reproducing apparatus comprising:

Images