JP2002197841A - Optical disk device and data erasure method of optical disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical disk device which assures a writable area by erasing existing data in recording the data to an optical disk. SOLUTION: Erasure candidate tracks are previously registered in an erasure candidate track memory table and when the recordable area is assured in recording speech data to an MD, the erasure candidate tracks are acquired according to the registered erasure priority from the erasure candidate track memory table. Next, the erasure confirmation of the acquired erasure candidate tracks is performed and when the erasing is possible, the recordable area is formed by erasing the erasure candidate tracks. The speech data is recorded in the newly formed recordable area.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an optical disk device for recording data on an optical disk and a data erasing method in the optical disk device.

[0002]

2. Description of the Related Art Conventionally, in optical disk devices, rewritable optical disks such as MD (Mini Disc) and CD-RW
It records audio data and the like on a recording medium such as (Compact Disc ReWritable), and reproduces data and deletes already recorded data. The optical disc has a program area that can be recorded continuously or discontinuously, and audio data and the like are recorded in this program area. Then, the management information of the recorded audio data is associated with the TNo (track number) and associated with the UTOC (User Table Of Content).
s) Recorded in the area.

The UTOC recorded in the UTOC area
The information includes address information indicating the position of the program area where the audio data for each TNo is recorded, and the audio data is reproduced based on the address information. At the time of recording, the start and end address information of the audio data recorded in the program area is recorded in the UTOC area in association with TNo.

Therefore, according to this mechanism, moving, combining, and erasing of audio data can be easily performed only by changing the contents of the UTOC information recorded in the UTOC area without directly operating the program area in which the audio data is recorded. It can be performed.

[0005] When actually recording audio data on an optical disk, a user refers to UTOC information in advance to check the free space of a recordable program area, and then records audio data. For this reason, when the free space in the program area is not sufficiently secured, the user manually erases the existing audio data, and secures the free space in the recordable program area before recording the audio data. .

[0006]

However, in such a conventional optical disk device, before recording audio data, it is necessary to secure a free space in a recordable program area, and it is desired to perform recording. If the data capacity is not clear, there is a problem that unnecessary data is erased. Also, if the free space becomes insufficient during the recording of the audio data, the recording of the audio data will be incomplete and secure the free space again,
I had to re-record from the beginning. Like this
The conventional optical disk device has a problem that it is very troublesome and troublesome.

An object of the present invention is to provide an optical disk apparatus which erases existing data and secures a writable area when recording data on the optical disk.

[0008]

According to the first aspect of the present invention,
2. Description of the Related Art In an optical disk device for recording and reproducing a rewritable optical disk on which data is recorded (for example, the optical disk device 1 shown in FIG. 1), identification information of data recorded on the optical disk is changed according to a priority order for erasing the data. Identification information recording means for recording (for example, the erasure candidate track storage unit 13 shown in FIG. 1) and erasing means for erasing data corresponding to the identification information recorded in the identification information recording means in accordance with the priority order (for example, , FIG.
3), and data recording means for recording new data in the recording area where the data erased by the erasing means has been recorded (for example, the processing shown in step S206 in FIG. 3). And a system controller 11).

According to the first aspect of the present invention, in an optical disc apparatus for recording / reproducing a rewritable optical disc on which data is recorded, the identification information recording means converts the identification information of the data recorded on the optical disc into data. Are recorded in accordance with the priority order for erasing, and the data corresponding to the identification information recorded in the identification information recording means is erased in accordance with the priority order by the erasing means, and the data is erased by the erasing means by the data recording means. In order to record new data in a recording area where data has been recorded, when recording data on an optical disk, desired data can be recorded without the need to delete the data in advance. Therefore, even when the capacity of the data to be recorded is unknown, the existing data is not unnecessarily deleted. In addition, the management of existing data is facilitated by recording the deletion candidate data in advance according to the priority of erasure.

A second aspect of the present invention is characterized in that, in the first aspect of the present invention, the identification information includes at least one of a data track number, data recording date and time, and data capacity.

According to the second aspect of the present invention, the identification information includes the track number of the data, the recording date and time of the data,
Since at least one of the data capacities is included, for example, priorities to be deleted are arbitrarily registered by the user, and priorities are automatically determined based on data recording date and time and data capacities to be deleted. You can also.

According to a third aspect of the present invention, in the first aspect of the invention, the erasing means is a free area search means for searching for a free area (for example, the system controller 11 performing the processing shown in step S202 in FIG. 3). Further comprising
When the free area cannot be searched by the free area search means, the data is erased.

According to the third aspect of the present invention, the erasing means further includes a free area search means for searching for a free area, and deletes data when the free area search means cannot search for a free area. Even when the free area runs short during data recording, the data is sequentially deleted and a free area is generated, so that the recording of new data does not end incompletely.

According to a fourth aspect of the present invention, in the first aspect of the invention, the erasing means confirms whether the data can be erased based on the identification information of the data recorded in the identification information recording means. The system further comprises an erasure confirmation unit (for example, a system controller 11 for performing an erasure candidate confirmation process shown in FIG. 4).

According to the fourth aspect of the present invention, the erasing means confirms whether the data can be erased by the erasing confirmation means based on the identification information of the data recorded in the identification information recording means. It is not necessary to erase necessary data.

[0016]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 5 are diagrams showing an embodiment of an optical disk device 1 to which the present invention is applied.

First, the configuration will be described. FIG. 1 is a block diagram illustrating a main configuration of an optical disc device 1 according to the present embodiment. In FIG. 1, an optical disc device 1
Optical disk recording / reproducing unit 10, system controller 1
1. RAM having an erasure candidate track storage unit 13 therein
(Random Access Memory) 12, an operation unit 14, a display unit 15, and the like, and these units are connected by a bus.

Further, the optical disk recording / reproducing unit 10 includes, for example, an optical disk driving unit for recording / reproducing an optical disk such as an MD (Mini Disc), an optical disk recording / reproducing circuit,
It comprises an analog input terminal 101, a digital input terminal 102, and an audio output terminal 103.

The optical disk drive includes a disk motor for rotating the MD loaded by a loading mechanism (not shown) on a turntable, an optical pickup for reading data from the MD and heating the disk when recording, and a feed mechanism for the optical pickup. A magnetic head that applies recording information as a magnetic field to the laser heating unit to perform perpendicular magnetization and a loading mechanism thereof, and writes or reads data by rotating the MD.

The optical disk recording / reproducing circuit encodes / decodes various audio data input from the analog input terminal 101 and the digital input terminal 102, temporarily records the audio data, and records / reproduces the MD based on the control of the system controller 11. -Performs various digital signal processing related to erasure. That is, at the time of recording, the analog audio data input from the analog input terminal 102 is converted into digital audio data, and this digital audio data or the digital audio data input from the digital input terminal 101 is converted into ATRAC (Adaptive TRansform Acousti).
c Cording) compression. Next, the compressed data is encoded into the MD format, and a signal subjected to encoding processing such as CIRC encoding and EFM modulation is output to the magnetic head of the optical disk drive.

At the time of reproduction, the signal read by the optical pickup is subjected to EFM demodulation, and further, the MD format signal obtained by CIRC demodulation is decoded to generate compressed audio data. Then, the compressed audio data is restored to audio data by the ATRAC method and output to the audio output terminal 103.

Further, at the time of erasing, UTOC (User Table Of Contents) information read from the MD is decoded and output to the system controller 11, and a UTOC input from the system controller 11, which will be described later.
The information is encoded and recorded in the UTOC information recording area. Alternatively, a control signal for driving and controlling the optical disk drive is generated according to control information input from the system controller 11.

The system controller 11 has a CPU (Ce
ntral Processing Unit), built-in ROM (Read Only Mem)
ory) and a RAM 12 described later. The built-in ROM stores an application program for controlling the operation of the optical disc device 1. CPU
Reads and executes various application programs stored in the built-in ROM and the RAM 12 to centrally control each unit of the optical disc device 1.

The system controller 11 obtains UTOC information from the optical disk recording / reproducing unit 10, and controls information for controlling the optical disk recording / reproducing unit 10 according to an instruction input via an operation unit 14, which will be described later. Generates UTOC information and the like,
Output to 0.

More specifically, the system controller 11
Reads an erasure candidate track registration processing program, a recording processing program, and an erasure candidate confirmation processing program stored in an internal ROM, and executes erasure candidate track registration processing (see FIG. 2), recording processing (see FIG. 3), Then, an erasure candidate confirmation process (see FIG. 4) is executed.

In the erasure candidate track registration processing, when an instruction for erasure candidate track registration is input via the operation unit 14, the system controller 11 confirms the presence / absence of the designated track. If the designated track exists, the data capacity and the recording date and time together with the TNo of the track are registered in an erasure candidate track storage table stored in the erasure candidate track storage unit 13 described later according to the erasure priority.

In the recording process, when the system controller 11 is instructed to start recording audio data via the operation unit 14, it checks the free space in the recordable area. If there is not enough free space in the recordable area,
The erasure candidate track is acquired from the erasure candidate track storage table, and the erasure candidate confirmation processing described later is performed, and the user confirms whether the track registered as the erasure candidate track can be erased. If the erasure candidate track is erasable, the erasure candidate track is erased to generate a recordable area. Then, the system controller 11 records the audio data in the recordable area.

If the recordable area becomes insufficient during recording, the system controller 11 obtains an erasure candidate track from the erasure candidate track storage table again, performs erasure candidate confirmation processing, and executes an erasure candidate track. Is erased to generate a new recordable area. Then, the recording of the audio data is continued until the recording stop instruction is input. If there is no recordable area and no erasure candidate track is registered in the erasure candidate track storage table, or if a user gives an instruction to stop recording, the recording process is stopped.

Further, in the erasure candidate confirmation processing, the system controller 11 confirms with the user whether the registered erasure candidate tracks can be erased. Specifically, the erasure candidate track is acquired from the erasure candidate track storage table stored in the erasure candidate track storage unit 13 described later, and the erasure confirmation of the acquired erasure candidate track is displayed. If the user does not input an erasure-impossible instruction, erasing is performed as an erasure-candidate track. If an erasure-impossible instruction is input, the track is deleted from the erasure-candidate track storage table and the next erasure-candidate track is deleted. Is stored at the head of the table, and the erasure candidate track storage table is updated.

The RAM 12 stores the system controller 11
A program storage area for storing application programs corresponding to the various control operations, an erasure candidate track storage unit 13, and a work area for temporarily holding management information such as UTOC information read from a loaded MD.

The erasure candidate track storage unit 13 stores an erasure candidate track storage table in which the erasure candidate tracks registered in the erasure track registration processing are stored. In this erasure candidate track storage table, tracks registered as erasure candidate tracks by the user are stored in accordance with erasable priorities.

Specifically, the track number (TN)
o), the recording date and time of the track, the capacity of the track, the playing time, and the like are stored. When a recordable area is generated in the storage process, the data is sequentially recorded from the track registered at the top of the erasable track storage table. Is erased. The erasure candidate track storage table may have a configuration in which the priorities of the erasure candidates are determined according to the recording date and time of the track and the capacity of the track.

The operation unit 14 includes various operation keys for instructing recording, reproduction, stop, deletion, and the like. When various keys are pressed, corresponding operation signals are generated and output to the system controller 11. The operation unit 14 may be configured to include an input device such as a remote controller.

The display unit 15 is an LCD (Liquid Crystal D)
It is configured to include a display screen such as isplay, and displays information input from the operation unit 14 and various display information output from the system controller 11. For example, UTOC information (TNo, performance start time,
Performance end time, etc.), the operation state of the optical disc apparatus 1 (reproducing, stopped, etc.), the operation mode (MD reproduction, MD recording, etc.),
In addition, a display such as a progress time of the reproducing / recording operation is performed. In the erasure candidate confirmation processing, a display for erasure confirmation of the erasure candidate track is performed.

Next, the operation of this embodiment will be described. A program for realizing each function described in the flowcharts of FIGS. 2 to 4 shown below is stored in a ROM built in the system controller 11 in the form of a readable program code. The controller 11 sequentially executes the operation according to the program code.

FIG. 2 shows an optical disk device 1 according to this embodiment.
FIG. 9 is a diagram showing an erasure candidate track registration process executed by the system controller 11 of FIG. As shown in FIG. 2, the system controller 11 first determines whether or not an instruction to start registration of an erasure candidate track has been input via the operation unit 14. When an instruction to start registration is input (Step S101; YES), the TNo of the erasure candidate track input by the user is obtained (Step S10).
2).

Next, the system controller 11 determines whether or not the specified track exists from the acquired TNo with reference to the UTOC information (step S10).
3). If the specified track exists (step S103; YES), the TNo of the specified track is
Data is stored in the erasure candidate track table stored in the erasure candidate track storage unit 13 in accordance with the erasure priority together with the data capacity and the data recording date (step S1).
04). If the specified track does not exist (step S103; NO), display information indicating that the track does not exist is generated and displayed on the display screen of the display unit 15 (step S105).

Then, the system controller 11 determines whether or not the end of registration of the erasure candidate track has been instructed. If the end of registration has been input, the main erasure candidate track registration processing is terminated as it is (step S106). ; Y
ES), if the registration end instruction is not input (step S106; NO), the process returns to step S102 and continues.

Next, recording processing executed by the system controller 11 will be described with reference to the flowchart shown in FIG. As shown in FIG. 3, the system controller 11 first determines whether or not an instruction to start recording on the MD has been input via the operation unit 14. If the recording start instruction is not input (step S201: N
O), the recording process is finished as it is, and when an instruction to start recording is input (step S201; YES), the system controller 11 determines whether there is a recordable area with reference to the UTOC information. (Step S20
2).

If there is a recordable area (step S
202; YES), recording of audio data in the recordable area is started (step S206). If there is no recordable area (step S202; NO), the erasure candidate track storage table is read, and the process proceeds to the erasure candidate confirmation processing described later, where whether or not the erasure candidate track is erasable is displayed to confirm to the user (Step S203).

Next, it is determined whether or not an erasure candidate track that can be erased is registered. If no erasable candidate track has been registered (step S204; N
O) If the recording process is completed and the erasure candidate track that can be erased is registered (step S20)
4; YES), erase the erasable erasure candidate track, and generate a recordable area. Further, the deletion candidate track stored in the deletion candidate track storage table is deleted and the table is updated (step S205). Then, the system controller 11 sets the recordable area to:
The recording of the audio data is started (step S206).

After starting the recording, the system controller 11 determines whether or not the free space of the recordable area where the recording is currently performed is satisfied. It should be noted that immediately after the start of recording, the free space of the recordable area is not satisfied, and it is considered that the process first proceeds to step S211. Therefore, when the free space in the recordable area is not satisfied (step S207; NO), it is determined whether the remaining free space in the recordable area where the current recording is being performed is equal to or smaller than a certain value (step S211). .

If the remaining amount of the recordable area is equal to or smaller than a predetermined value (step S211; YES), the erasure candidate track storage table is read, and the process proceeds to erasure candidate confirmation processing to be described later. Is displayed and the user is confirmed (step S212). And
The system controller 103 proceeds to step S213.

On the other hand, if the remaining amount of the recordable area is equal to or more than the predetermined value (step S211; NO), it is determined whether or not there is a recording stop instruction. If there is a recording stop instruction (step S213). ; YES), a recording stop process is executed (step S214), and the recording process ends. If there is no instruction to stop recording (step S213; N
O) The recording process is continued as it is, and the process proceeds to step S207.

Returning to step S207, if the free space in the current area is satisfied (step S207; Y
es) It is determined whether or not an erase candidate track is registered. If no erasure candidate track is registered (step S
208; NO), a recording stop process is executed (step S
214), the recording process ends.

On the other hand, if the erasure candidate track is registered (step S208; Yes), the erasable erasure candidate track is erased to generate a recordable area. Further, the erasure candidate track stored in the erasure candidate track storage table is deleted, and the table is updated (step S209). Then, the system controller 11 switches to the next recordable area and continues recording the audio data (step S210).

FIG. 4 shows the system controller 1
FIG. 2 is a diagram showing an erasure candidate confirmation process executed as a part of the recording process by No. 1; In FIG. 4, the system controller 11 reads the erasure candidate track storage table from the RAM 12 and determines whether or not the erasure candidate track is registered (step S301).

Here, if no erasure candidate track is registered (step S301; NO), the main erasure candidate confirmation processing is terminated as it is, and if an erasure candidate track is registered (step S301; YES), The track registered at the head of the erasure candidate track storage table is displayed on the display screen via the display unit 15 to check whether erasure is possible (step S302).

Then, the system controller 11 determines whether or not there is a non-erasable instruction for the track shown in step S302. If there is no erasure-impossible instruction (step S303; NO), the main erasure candidate confirmation processing is terminated as it is, and if there is an erasure-impossible instruction (step S303; NO), it is registered in the erasure candidate track storage table. Then, the information of the erasure candidate track storage table is updated by deleting the first track (step S304).

As described above, according to the optical disk apparatus 1 of the embodiment of the present invention, the erasure candidate tracks are registered in the erasure candidate track storage table in advance, and the MD
To secure a recordable area when recording audio data to the erasure candidate tracks, the erasure candidate tracks are acquired from the erasure candidate track storage table in accordance with the erasure priorities registered. Next, erasure confirmation of the obtained erasure candidate track is performed, and if erasure is possible, the erasure candidate track is erased to generate a recordable area. Then, the audio data is recorded in the newly generated recordable area.

Therefore, when the user records audio data on the MD, desired audio data can be recorded without requiring an operation of securing a free space in a recordable area in advance. For this reason, even if the capacity of the data is not known before the recording of the audio data, the existing data is not unnecessarily deleted. Further, when erasing the erasure candidate track, the erasure confirmation is performed to the user, so that the necessary data is not accidentally erased.

Furthermore, even when the free space of the recordable area becomes insufficient during recording, the recordable area is generated by sequentially erasing the erasure candidate tracks, so that the recording does not end incompletely. Alternatively, by registering the erasure candidate tracks in advance in the erasure priority order, management of existing data and management of free space in a recordable area become easy.

The description in the present embodiment is an example of the optical disk device 1 according to the present invention, and the present invention is not limited to this. For example, in the present embodiment,
Although the optical disk has been described as an MD, the CD-RW (Comp
Any rewritable recording medium such as act Disc ReWritable) may be used.

Further, a configuration may be adopted in which information on the erasure priority of the erasure candidate track stored in the erasure candidate track storage table can be written as a part of the UTOC information. In addition, the optical disc device 1 according to the present embodiment
The detailed configuration and detailed operation of can be appropriately changed without departing from the spirit of the present invention.

[0055]

According to the first aspect of the present invention, there is provided an optical disk device,
According to the data erasing method of the optical disk device of the present invention, when data is recorded on the optical disk, desired data can be recorded without requiring an operation of erasing the data in advance. . Therefore, even when the capacity of the data to be recorded is unknown, existing data is not unnecessarily deleted. In addition, the management of existing data is facilitated by recording the deletion candidate data in advance according to the priority of erasure.

According to the optical disk apparatus of the second aspect of the present invention, for example, the priority of erasure is determined arbitrarily by the user and automatically determined based on the date and time of data recording and the volume of data. Can also be erased.

According to the optical disk apparatus of the third aspect, even when the free space becomes insufficient during the recording of data, the data is sequentially deleted and the free area is generated, so that new data can be recorded. It never ends incomplete.

According to the optical disk apparatus of the fourth aspect of the present invention, necessary data is not erased by mistake.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a main configuration of an optical disc device 1 according to an embodiment of the present invention.

FIG. 2 is a flowchart showing an erasure candidate track registration process executed by a system controller 11 of FIG. 1;

FIG. 3 is a flowchart showing a recording process executed by a system controller 11 of FIG.

FIG. 4 is a flowchart showing an erasure candidate confirmation process executed by the system controller 11 of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Optical disk apparatus 10 Optical disk recording / reproducing part 101 Analog input terminal 102 Digital input terminal 103 Audio output terminal 11 System controller 13 Erasure candidate track storage part 14 Operation part 15 Display part

Claims (5)

[Claims] 1. An optical disk device for recording and reproducing a rewritable optical disk on which data is recorded, wherein identification information of data recorded on the optical disk is
Identification information recording means for recording the data in accordance with the priority order for erasing the data, erasing means for erasing data corresponding to the identification information recorded in the identification information recording means in accordance with the priority order, erasing by the erasing means Data recording means for recording new data in a recording area in which the recorded data has been recorded. 2. The optical disk apparatus according to claim 1, wherein the identification information includes at least one of a data track number, a data recording date and time, and a data capacity. 3. The data processing apparatus according to claim 2, wherein said erasing means further comprises a free area search means for searching for a free area, and said data is deleted when said free area search means cannot search said free area. 2. The optical disc device according to 1. 4. The apparatus according to claim 1, wherein said erasing means further comprises an erasing confirmation means for confirming whether the data can be erased based on the identification information of the data recorded in said identification information recording means. Item 2. The optical disk device according to item 1. 5. A data erasing method in an optical disk device for recording and reproducing a rewritable optical disk on which data is recorded, wherein the identification information of data recorded on the optical disk is recorded in accordance with a priority order for erasing the data. An information recording step, an erasing step of erasing data corresponding to the identification information recorded in the identification information recording step in accordance with the priority order, and a new recording area in which the data erased in the erasing step is recorded. A data erasing method in an optical disc device, comprising: a data recording step of recording data.