JP2006318595A - Optical disk unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical disk unit, wherein erroneous overwrite and erasure to an optical disk which can be overwritten, such as DVD+RW and the like, are prevented with excellent operability for a user. <P>SOLUTION: In the optical disk unit, a control part moves a title 340 to the head of a recordable area 211 by replacing titles 310, 320 330 existing before the title 340 with the title 340 which is set in erasure inhibit by a user in an optical disk, and moreover records information showing that the title 340 is in erasure inhibit on the optical disk. Also, the control part arranges thumb-nails of titles 310, 320, 330, 340 in order of recording positions of the titles 310, 320, 330, 340 in the optical disk and display them on a display device. Furthermore, when the control part acquires an instruction for performing recording in the title 340 of the erasure inhibit, the part controls an optical disk driving part so as to start recording from the head of a recording possible area 212. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to an optical disc apparatus, and in particular, a DVD (Digital Versatile Disk) + RW (Re
The present invention relates to a technique for preventing erroneous overwriting and erasing of an rewritable optical disc.

With DVD + RW, a DVD + RW video recording format (or DVD + VR (Video Recording) format) compliant with the DVD video format can be used to add information to an empty area or overwrite an area where a title has already been recorded.
This is similar to VCR (Video Cassette Recorder).
JP-A-10-112115 JP-A-11-176096 JP 2001-167507 A

However, in the conventional DVD device, for example, when recording is started from a state in which the title at the head of the disc is selected or specified, recording starts from the area of the head title, so the existing title is overwritten and disappears. There's a problem.

The present invention has been made in view of this point, and an object of the present invention is to provide an optical disk device that is easy to use for a user by preventing erroneous overwrite and erasure on an overwritable optical disk such as a DVD + RW.

To achieve the above object, according to the present invention, an optical disc apparatus includes: a control unit; an optical disc drive unit that performs a recording operation and a reading operation on an rewritable optical disc under the control of the control unit; and an instruction from a user. An input unit for acquiring and transmitting to the control unit,
The control unit obtains the designated title in the title recordable area in the optical disc when the instruction to set the designated title in the title recordable area in the optical disc to be erasure prohibited is obtained via the input unit. Title movement control for moving to the top and erasure prohibition information recording control for recording information indicating that the designated title is erasure prohibited on the optical disc, and the control unit stores information on the title in the optical disc. In the display device, information display control is performed in which the corresponding titles are arranged and displayed in the order of recording positions in the optical disc.

According to such a configuration, it is possible to apply double erasure protection by title movement control and information display control and erasure prohibition information recording control. Can be prevented. At this time, according to the title movement control and the information display control, the erasure prohibition title exists before the title recordable area (after the erasure prohibition information recording control, the recording area of the erasure prohibition title deviates from the title recordable area. The information related to the erasure prohibition title is displayed higher on the screen than the other titles in the title recordable area. As a result, the title related to the information displayed at the top is set to be prohibited from being erased, and it is possible to alert the user that the title cannot be overwritten / erased. Overwriting and erasing can be prevented. In particular, when a large amount of information is displayed, the higher the display, the easier it is to draw the user's attention, and this effect is remarkable. As a result, it is possible to provide an optical disc device that is convenient for the user. Moreover, according to the title movement control, a continuous wide area can be secured as a subsequent title recordable area as compared with the case where the erasure prohibited title is left in the middle of the title recordable area without being moved. That is, recording can be performed for a long time. In this respect as well, it is possible to provide an optical disc device that is convenient for the user.

In addition, when the control unit obtains an instruction to perform the recording operation with respect to an erasure prohibited title through the input unit, the control unit performs the recording operation from the top of the title recordable area after the erasure prohibited title. It is preferable to further perform recording position control for controlling the optical disc drive unit to start.

According to such a configuration, when a recording operation is being performed on an erasure-prohibited title, the recording operation starts from the beginning of the title recordable area instead of the title, so the above-described erroneous overwriting or erasure is performed. Can be prevented more reliably. At the same time, it is possible to quickly start the recording operation while saving time and trouble for the user to check the recording position. Thereby, it is possible to provide an optical disc device that is convenient for the user.

In addition, the title movement control is performed by replacing the designated title in the title recordable area by exchanging the designated title and another title existing before the designated title in the title recordable area in the optical disc. It is preferable that the control be moved to the head.

According to such a configuration, it is possible to leave another title at the destination of the erasure-prohibited title in the optical disc without being overwritten / erased. Therefore, the user does not have to manage the other titles when setting the deletion prohibition. Therefore, it is possible to provide an optical disc device that is convenient for the user.

  Note that none of the Patent Documents 1 to 3 discloses the title movement control.

According to the present invention, it is possible to prevent an existing title from being overwritten or erased by mistake, and to provide an optical disc device that is convenient for the user.

FIG. 1 is a block diagram for explaining a DVD apparatus (optical disk apparatus) 1 according to an embodiment of the present invention. As shown in FIG. 1, the DVD apparatus 1 is regarded as two individual objects, that is, an apparatus main body 2 and a remote control apparatus (hereinafter also referred to as “remote control”) 51.

In FIG. 1, a DVD (optical disc) 200 is shown for explanation, but here it is assumed to be DVD + RW which is an overwritable optical disc. FIG. 1 also shows an externally connected display device 69 for explanation. As the display device 69, a CRT (Cathode-ray Tu
be) Various types of display devices such as a display, a liquid crystal panel display, and a plasma display are applicable.

As shown in FIG. 1, the DVD device 1 includes a control unit 10, a DVD drive unit (optical disk drive unit) 20, a hard disk (HDD) unit 30, a remote controller 51, a remote control light receiving unit 52, and the apparatus main body 2. Provided operation switch (or operation button) 53, front panel control unit 54, front panel display unit 61, output signal generation unit 62, tuner 81, external input terminal 82, and switch (or selector) 83. And an input signal processing unit 84. In order to distinguish from the front panel control unit 54, the control unit 10 is referred to as “main control unit 10”.
I will call it.

As shown in FIG. 1, the main control unit 10 includes a CPU (Central Processing Unit) 11 and a memory 12. The memory 12 includes a ROM (Read Only Memory) in which programs and data for various controls by the main control unit 10 are stored, and a CP.
The RAM (Random Access Memory) used by U11 as a work area is generically named. When the CPU 11 executes the program in the memory 12, various controls by the main control unit 10 are realized.

The DVD drive unit 20 is configured to perform a recording operation (or writing operation) and a reading operation with respect to the DVD 200, and includes, for example, an optical head, a control circuit for the optical head, a mechanical mechanism, and the like. . The hard disk unit 30 can record large-capacity data such as video, and the main control unit 10 can also be used as an auxiliary storage device.

The operations of the DVD drive unit 20 and the hard disk unit 30 are controlled by the main control unit 10. In particular, the DVD device 1 is configured to be able to execute recording and reading with respect to the DVD 200 (here, DVD + RW) in accordance with the DVD + RW video recording format compliant with the DVD video format under the control of the main control unit 10. In addition,
Under the control of the main control unit 10, the DVD drive unit 20 and the hard disk unit 30 are provided so as to be able to transfer data to each other.

An operation switch 53 provided on the remote controller 51 and the apparatus main body 2 is a means for acquiring various instructions from the user. A signal from the remote control 51 is transmitted to the front panel control unit 54 via the remote control light receiving unit 52. The front panel control unit 54 converts signals from the remote control light receiving unit 52 and the operation switch 53 into a command signal corresponding to the contents thereof, and converts the signal from the main control unit 1.
Output to 0. At this time, in the DVD apparatus 1, a remote controller 51 and a remote controller light receiving unit 52 are provided.
When the configuration comprising the operation switch 53 and the front panel control unit 54 is called an “input unit 50”, an instruction from the user is acquired in the DVD device 1 by the input unit 50 and transmitted to the main control unit 10. The

The front panel control unit 54 performs various controls under the control of the main control unit 10. For example, the front panel control unit 54 performs display control of the display unit 61 in order to display the operation status of the DVD apparatus 1, a guide menu for operations and settings, time, and the like on the front panel display unit 61.

The tuner 81 selects and outputs a television broadcast signal of a channel desired to be received from a plurality of television broadcast signals guided from a television antenna (not shown) or the like. The external input terminal 82 is a terminal for taking in a signal from another external device. Signals from the tuner 81 and the external input terminal 82 are input to the switch 83, and the switch 83 switches which signal is input to the input signal processing unit 84. The input signal processing unit 84 includes a switch 83.
Is converted into a signal or data in a format that can be processed by the main control unit 10 and output to the main control unit 10. For example, a signal from the switch 83 is converted into a digital signal, and digital data encoded from the digital signal is generated and output to the main control unit 10.

The main control unit 10 controls the output signal generation unit 62 based on data acquired from the tuner 81, the external input terminal 82, the DVD 200, and the hard disk unit 30 (internal hard disk). The output signal generation unit 62 is controlled by the main control unit 10 under the display device 69.
Output signals (video signal and audio signal) suitable for the above are generated and output to the device 69. For example, when the display device 69 is an analog system, the output signal generation unit 62 generates a digital signal by combining digital data from the main control unit 10, and further converts the digital signal into an analog signal to generate an output signal. And output.

Further, the output signal generation unit 62 outputs a signal for OSD (on-screen display) display or voice output on the display device 69 as the output signal under the control of the main control unit 10 as the output signal. Generate and output.

Under such a configuration, the DVD device 1 performs the following control in particular. FIG. 2 shows a schematic diagram for explaining the control by the main control unit 10, and FIG. 3 shows the management information 300 in FIG.
FIG. 4 and FIG. 5 are flowcharts for explaining the control. 6 and 7 are schematic diagrams of screen display in the display device 69 regarding the control.

As described above, the DVD drive unit 20 performs a recording operation and a reading operation on the DVD 200 (here, DVD + RW) according to the DVD + RW video recording format under the control of the main control unit 10. At this time, as shown in FIG. 2, according to the DVD + RW video recording format, the DVD video area (or D
Management information 300 is recorded at the head of the (VD video zone), and following the management information 300, titles (four titles 310, 320, 330, and 340 in the example of FIG. 2) are recorded.

In the file structure diagram shown in FIG. 2, the left direction of the drawing is considered to be “front” of the DVD video area (and the data recording area of the DVD 200 including the area), and the right side is assumed to be “rear”. Then, an expression such as “the head of the (DVD video area)” is used.

The management information 300 is managed by a video manager (VMG) and / or video title set information (VTSI). The video manager (VMG) includes video manager information (VMGI) and a menu video object set (VMGM_VOBS).
) And video manager information backup (VMGI_BUP). Video manager information (VMGI) is information for managing and controlling the entire DVD video area, and video title set information (VTSI) is for managing and controlling a video title set (VTS) composed of one or more titles. This information is provided for each video title set.

As shown in FIG. 3, the management information 300 includes titles 310, 320, 330,
Information about 340 playback order (playback information), titles 310, 320, 330, 34
Information about recording position (recording position information) about 0, information about erasure prohibition setting (on / off setting) (erasure prohibition information), and thumbnails of titles 310, 320, 330, and 340 (also called “index pictures”) 311 , 321, 331, 341 and the like. In the DVD device 1, it is assumed that the main control unit 10 creates thumbnails 311, 321, 331, and 341 and stores them in the management information 300 of the DVD 200 in advance when the titles 310, 320, 330, and 340 are recorded.

Here, in the state shown in FIG. 2A, that is, the DVD 200 has four titles 310.
320, 330, 340 are recorded in this order, and the area after the title 340 is a free area 350. At this time, in the state of FIG. 2A, it is assumed that the four titles 310, 320, 330, and 340 are not set to be prohibited from being erased. It should be noted that an area in which a title can be recorded by overwriting or appending after the recording area of the management information 300 (in other words, an area that is not set to be erasable) is referred to as “title recordable area” or simply “recordable area”. I will call it. According to this, in the state of FIG. 2A, the areas of the titles 310, 320, 330, 340 and the free area 3
50 constitutes a recordable area 211. In other words, titles 310, 320, 330, and 340 are recorded in the recordable area 211.

First, a case where a desired title 310, 320, 330, or 340 is set to be erasure prohibited will be described.

When the DVD 200 in the state of FIG. 2A is set in the DVD drive unit 20,
As shown in step ST11 in FIG.
21, 331, 341, DVD 2 of corresponding titles 310, 320, 330, 340
The information is displayed on the display device 69 in the order of recording positions in 00 (information display control).

Specifically, the main control unit 10 controls the DVD drive unit 20 to provide thumbnails 311, 321, 331, and 341 prepared in advance as information on the titles 310, 320, 330, and 340 in the DVD 200 (FIG. 3). The thumbnails 311, 321, 331, and 341 are acquired by reading The main control unit 10 controls the output signal generation unit 62 to display the thumbnails 311, 321, 331, and 341 on the display device 6.
9 is displayed. At this time, the main control unit 10 displays the thumbnails 311, 321, 33.
1 and 341 are DVDs of titles 310, 320, 330, and 340 in the display device 69.
The output signal generation unit 62 is controlled so as to be arranged in the order of the recording positions in 200 (see FIG. 6).

In the example of the screen display shown in FIG. 6, four thumbnails 311, 321, 331, 341 are represented by 2
Although displayed in two rows and columns, the closer to the top of the screen, the higher the position on the screen display, and in the same row, the higher the position on the screen display, the closer to the left side of the screen. That is, in the example of FIG. 6, four thumbnails 311, 321, 331, and 341 are displayed in this order from the top in the screen display, and the display position order is the corresponding title 310, 320, 330, 3
This matches the order of recording positions in 40 DVDs 200.

Here, the thumbnails 311, 321, 331, and 341 prepared in advance are represented by D
These are acquired by reading from the VD 200, but may be configured as follows. That is, among the titles 310, 320, 330, and 340, the thumbnail 311,
The management information 300 manages the recording position of the video used as the 321, 331, 341 in the DVD 200 in the management information 300, and the main control unit 10 refers to the management information 300 whenever necessary to refer to the thumbnails 311, 321, 331, 341 from the video. The thumbnails 311, 321, 331, and 341 may be acquired by generating.

For example, by managing information such as the title name, description, recording date and time, and recording time of each title 310, 320, 330, and 340 in the management information 300, the information can be changed to D.
The title 310 in the DVD 200 is read from the VD 200, instead of the thumbnails 311, 321, 331, 341 or together with the thumbnails 311, 321, 331, 341.
, 320, 330, 340 may be displayed as information.

Then, when the user inputs an instruction to designate or select a title (here, title 340) and set the title 340 to be erasure prohibited by operating the remote controller 51 (see FIG. 1) or the like, the main control is performed. The unit 10 obtains the instruction via the input unit 50 (see FIG. 1) as shown as step ST12 in FIG.

By acquiring such an instruction, the main control unit 10 controls the DVD drive unit 20 to move the title 340 designated by the user to the head of the recordable area 211 (title movement control) as shown in step ST13 in FIG. ).

Specifically, the main control unit 10, in the state of FIG. 2A, the other titles 310, 320, and 330 that exist before the designated title 340 in the recordable area 211, the designated title 340, 2B in FIG. 2 by changing the recording position in the DVD 200.
The designated title 340 is recorded in the recordable area 211 (recordable area 21 as will be described later).
(Updated as 2). At this time, for example, the titles 310, 320, 330, and 340 are once read from the DVD 200 to the hard disk unit 30 under the control of the memory 12 of the main control unit 10 or the main control unit 10, and the order after the replacement, that is, the titles 340, 310, and 320 , 330, the above-described title movement control can be performed by recording from the beginning of the recordable area 211 of the DVD 200 (overwriting). As the title moves, the main control unit 10 controls the DVD drive unit 20 to record the recording position information of each title 310, 320, 330, 340 in the management information 300 in the DVD 200 (see FIG. 3). Update etc.

Further, as shown in step ST14 in FIG. 4, the main control unit 10 controls the DVD drive unit 20 to inform the DVD 200 that the designated title 340 is prohibited from being erased.
(Erase prohibition information recording control). Specifically, the main control unit 10 is the DVD 200.
In the management information 300, the erasure prohibition information (see FIG. 3) of the designated title 340 is updated to erasure prohibition ON. Note that the erasure prohibition on / off setting can be performed, for example, by assigning a predetermined flag to the erasure prohibition information in the management information 300 and setting the state of the flag.

After such title movement control and erasure prohibition information recording control, the DVD 200
As shown in FIG. 2B, the management information 300 is followed by titles 340, 310.
, 320, 330 are recorded in this order. After the above control, the recordable area 211 is recorded.
Is updated to the recordable area 212. That is, since the title 340 is set to be prohibited from being erased, the area of the title 340 becomes an area that cannot be recorded (overwritten) (hereinafter referred to as “title recording impossible area” or simply “recording impossible area”) 222. The area obtained by removing the non-recordable area 222 from the recordable area 211 becomes a new recordable area 212.

From the state of FIG. 2 (B) in which the title 340 is set to prohibit deletion, the title 32 is further added.
The same control is performed when 0 is set to prohibit erasure. That is, the main control unit 10
As shown in FIGS. 2B and 2C, the designated title 320 is designated by replacing the title 310 other than the designated title 320 in the updated recordable area 212 with the designated title 320. The title 320 is moved to the top of the recordable area 212 (title movement control). Then, the main control unit 10 updates the erasure prohibition information (see FIG. 3) of the designated title 320 in the management information 300 and sets the erasure prohibition ON (erase prohibition information recording control). In the subsequent DVD 200, as shown in FIG. 2C, after the management information 300, titles 340, 320, 310, 330 are recorded in this order, and the recordable area 212 is the title 320. The recordable area 213 excluding the area is updated, and the recordable area 222 is updated to a recordable area 223 including the title 320 area.

Next, a new title is added to the tuner 81 for the DVD 200 in the state shown in FIG.
A case of recording from (see FIG. 1) will be described.

When the DVD 200 is set in the DVD drive unit 20 (see FIG. 1), as shown in FIG. 5, the main control unit 10 titles 340, 3 as in the above-described step ST11.
The display device 69 displays the thumbnails 341, 321, 311, and 331 of the 20, 310, and 330 in the order in which the corresponding titles 340, 320, 310, and 330 are recorded in the DVD 200.
(Refer to FIG. 7). At this time, as shown in FIG.
Two thumbnails 341, 321, 311, 331 are displayed in this order, and the display position order matches the order of the recording positions in the DVD 200 of the titles 340, 320, 310, 330.

Then, the user designates or selects a title (here, title 340) by operating the remote controller 51 (see FIG. 1) or the like and starts recording a new title from the top of the title 340, that is, the title 340. If an instruction to overwrite a new title is input to the main control unit 10, the main control unit 10 acquires the instruction via the input unit 50 (see FIG. 1) as shown in step ST21 in FIG. .

The main control unit 10 that has acquired the instruction starts recording the new title from the beginning of the recordable area 213, which is an area after the user-specified data 340, as shown in step ST22 in FIG. Recording position control).

Specifically, step ST22 includes the following steps ST22A, ST22B, ST22C. That is, as shown as step ST22A in FIG.
By controlling the DVD drive unit 20, the erasure prohibition information (see FIG. 3) in the management information 300 of the DVD 200 is referred to, and ON / OFF of the erasure prohibition setting of the designated title 340 is checked. Here, since the erasure prohibition setting for the title 340 is turned on, the main control unit 10 turns on / off the erasure prohibition setting for the next (rear) title 320 of the designated title 340 as shown in step ST22B. Check off as well. Here, since the erasure prohibition setting for the title 320 is also turned on, the main control unit 10 further repeats step ST22B, and similarly turns on / off the erasure prohibition setting for the next (next) title 310 of the title 320. To check. Here, since the deletion prohibition setting for the title 310 is turned off, the main control unit 10 determines the title 3 as shown in step ST22C.
Set the top of 10 as the recording start position and record a new title (overwrite)
.

If the user designates the title 320 with the erasure prohibition setting ON, step ST2
The process moves from step ST22B to step ST22C without repeating 2B. When the user designates the title 310 or 330 whose erase prohibition setting is off, the process proceeds from step ST22A to step ST22C without passing through step ST22B.

Here, an example has been given in which the deletion prohibition setting of the titles 320 and 310 behind the user-specified title 340 is sequentially checked in step ST22B, but for example, the start position of the recordable area 213 in the management information 300 In this case, instead of step ST22B, the main control unit 10 refers to the management information 300 to acquire the start position of the recordable area 213 and set the position as the recording start position ( Or control) can be applied.

According to such a DVD apparatus 1, the following effects can be obtained. Here, the above-described state in which the title 340 is set to be prohibited from being erased or is set will be described as an example.

First, double erasure protection by title movement control (ie, step ST13) and information display control (ie, step ST11) and erasure prohibition information recording control (ie, step ST14) can be applied. Can be prevented from being overwritten or erased by mistake.

At this time, according to the title movement control and the information display control, the erasure prohibition title 340 is located before the recordable area 212, so that the thumbnail 341 of the erasure prohibition title 340 includes the other titles 310, 310 in the recordable area 212. 320 and 330 thumbnails 311 and 32
It is displayed on the screen higher than 1,331. As a result, thumbnail 3 displayed at the top
Since the title 340 related to No. 41 has been set to the prohibition of erasure, it is possible to alert the user that the title 340 cannot be overwritten or erased. Can be prevented. In the above example, the case where there are four titles has been described. However, when a very large number of thumbnails are displayed, such an effect is remarkable in view of the fact that the higher-level display is easier to attract the user's attention. As a result, the DVD device 1
Therefore, it is possible to provide a user-friendly environment for the user.

Moreover, according to the title movement control, a continuous wide area can be secured as the subsequent recordable area 212 as compared with the case where the erasure prohibition title 340 is left in the middle of the recordable area 211 without being moved. . That is, recording can be performed for a long time. Also in this respect, the DVD device 1 can provide a user-friendly environment.

In title movement control, a title 340 designated to be deleted and other titles 310 and 3
Since the recording areas 20 and 330 are exchanged, the other titles 310, 320, and 330 at the destination of the erasure-prohibited title 340 can be left in the DVD 200 without being overwritten / erased. For this reason, when the user sets deletion prohibition, the other title 3
There is no need to manage 10, 320, 330. Therefore, also in this respect, the DVD device 1 can provide a user-friendly environment.

Further, when the recording operation is being performed on the erasure prohibited title 340, the recording operation starts from the top of the recordable area 213 instead of from the title 340, so that the above-described erroneous overwriting or erasure can be more reliably performed. Can be prevented. At the same time, it is possible to quickly start the recording operation while saving time and trouble for the user to check the recording position.
Thereby, the DVD apparatus 1 can provide an environment that is convenient for the user.

The DVD apparatus 1 has been described as a so-called (HDD built-in) DVD recorder.
As long as an optical disc apparatus capable of performing the above-described control / operation in the D apparatus 1 is provided, for example,
The above description is valid for a configuration in which the DVD device 1 and the display device 69 are integrated or a configuration using a personal computer (whether a desktop type or a notebook type).

These are block diagrams for demonstrating the DVD apparatus which concerns on embodiment. These are the schematic diagrams for demonstrating the control which concerns on embodiment. These are the schematic diagrams for demonstrating the management information which concerns on embodiment. These are the flowcharts for demonstrating the control which concerns on embodiment. These are the flowcharts for demonstrating the control which concerns on embodiment. These are the schematic diagrams of the screen display for demonstrating the control which concerns on embodiment. These are the schematic diagrams of the screen display for demonstrating the control which concerns on embodiment.

Explanation of symbols

1 DVD device (optical disk device)
10 Main control unit (control unit)
20 DVD drive (optical disk drive)
50 Input unit 200 DVD (optical disk)
211, 212, 213 Title recordable area 300 Management information 310, 320, 330, 340 Title 311, 321, 331, 341 Thumbnail (information on title)
ST11 Step (Information display control)
ST13 Step (Title movement control)
ST14 Step (Erasure Prohibition Information Recording Control)
ST22 Step (Recording position control)

Claims (3)

A control unit;
An optical disc drive unit that performs a recording operation and a reading operation on an rewritable optical disc under the control of the control unit;
An input unit that acquires an instruction from a user and transmits the instruction to the control unit,
The controller is
When the instruction to set the designated title in the title recordable area in the optical disc to be prohibited from being erased is obtained via the input unit, the designated title and the title in the title recordable area are preceded by the designated title. The title movement control for moving the designated title to the head of the title recordable area by replacing the other title in the optical disc with the other title, and information indicating that the designated title is prohibited from being erased Erasure prohibition information recording control to be recorded on,
Information display control for displaying information on titles in the optical disc in the display device in order of recording positions of the corresponding titles in the optical disc;
The recording operation is started when the instruction to perform the recording operation on the erasure-prohibited title is acquired via the input unit, so that the recording operation is started from the head of the title recordable area after the erasure-prohibited title. An optical disc apparatus that performs recording position control for controlling an optical disc drive unit. A control unit;
An optical disc drive unit that performs a recording operation and a reading operation on an rewritable optical disc under the control of the control unit;
An input unit that acquires an instruction from a user and transmits the instruction to the control unit,
The controller is
When an instruction to set erasure prohibition for a specified title in the title recordable area in the optical disc is acquired via the input unit,
Title movement control for moving the designated title to the beginning of the title recordable area on the optical disc;
And erasure prohibition information recording control for recording information indicating that the designated title is erasure prohibition on the optical disc,
The controller is
An optical disc apparatus, wherein information related to a title in the optical disc is displayed and arranged on the display device in order of recording positions of the corresponding title in the optical disc. The control unit starts the recording operation from the top of the title recordable area after the erasure prohibited title when the instruction to perform the recording operation on the erasure prohibited title is acquired via the input unit. 3. The optical disc apparatus according to claim 2, further comprising a recording position control for controlling the optical disc drive unit.

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