JP2008269672A - Optical disk recording/reproducing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical disk recording/reproducing apparatus capable of recovering and reproducing a title corresponding to title information deleted without being finalized in the optical disk of DVD-R. <P>SOLUTION: When judging that an inserted optical disk is a non-finalized optical disk, the title information is acquired from the RMA of the optical disk and also the title information is acquired from a recording region at the head of the optical disk. After it is judged that there is the deleted title information by comparing both of the title information, when the instruction of the reproduction of a deleted title is received, the deleted title information is read, and the deleted title is reproduced from the optical disk according to the title information. That is, the title corresponding to the title information deleted while the optical is not finalized can be revived and handleability is improved. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an optical disc recording / reproducing apparatus that records information on an optical disc and reproduces information recorded on an optical disc, and more particularly, to title information acquisition processing on a DVD-R optical disc.

  Conventionally, there is a format called DVD video (DVD-Video) as a format for recording a moving image on a DVD optical disk. In the DVD video format, lead-in (Lead in), file system (FS), VMGI (Video Management General Information), VMGM_VOBS (Video Management Menu Video Objects), VTS (Video Title Set), and lead-out from the first recording area Each information of (Lead out) is recorded. Of these, VMGI is playback control information for the entire DVD optical disk, and VMGM_VOBS is the basis of the menu screen. The lead-out prohibits additional writing to the DVD. VMGI, VMGM_VOBS, and lead-out are generated at the time of finalizing a recording DVD such as DVD-R, DVD-RW, DVD + R, and DVD + RW.

  FIG. 5 is a data structure diagram showing changes in recorded data on a DVD due to finalization. The finalizing process will be described with reference to FIG.

As shown in FIG. 5A, a lead-in, a file system, and a plurality of VTSs are recorded on an unfinalized DVD. In finalizing to DVD, as shown in FIG. 5B, VMGI and VMGM_VOBS are generated and recorded on the DVD. When generating VMGM_VOBS, first, a representative image representing the contents of each VTS is selected from a plurality of VTSs. Then, the representative image is resized to generate a still image thumbnail. This still image thumbnail is repeated for the number of scenes to generate a menu screen. Then, the menu screen that is bitmap data is re-encoded into a video stream. A packetized version of this is called a video pack. In finalization, a menu screen with a still image thumbnail pasted is generated. The configuration of the menu screen is predetermined.
JP 2006-302474 A JP 2006-40369 A JP 2003-331526 A

  By the way, in the case of the DVD video format, the character string code “DVDVIDEO-VTS” is described in each title. Even when information is recorded on the DVD-R optical disc in an unfinalized state, the character code is recorded, so the title information is acquired from the character code. However, since the title information is deleted from the title information acquired in the RMA (Recording Management Area), the title corresponding to the title information cannot be reproduced.

  That is, in the conventional optical disc recording / reproducing apparatus, the title information can be read only by the RMA, and therefore the title corresponding to the title information cannot be reproduced with respect to the title information once deleted from the RMA. There is a problem that it is inconvenient for the user because it becomes impossible to restore titles (such as titles that are treated as hidden titles) corresponding to title information that has been deleted from the DVD-R optical discs that have not been finalized.

  Note that the prior art in Patent Document 1 is intended to improve the efficiency of refinalization of a recording medium that has already been finalized, and a title (hidden title) corresponding to title information that has been deleted on the DVD-R optical disk without being finalized. A process for reviving a treated title or the like) is not disclosed.

  In the prior art of Patent Document 2, when the DVD-R is not finalized, the access processing execution unit is based on the RZone information written in the RMD on the already read portable recording medium. According to the determination result, the position where TMPVMGI is written on the portable recording medium is acquired and the TMPVMGI is read to speed up the processing until the content recorded on the portable recording medium is reproduced. However, this prior art also discloses a process for restoring a title (such as a title that is treated as a hidden title) corresponding to title information that has been deleted from the DVD-R optical disc without being finalized. It has not been.

  The prior art of Patent Document 3 discloses a process in which an unfinalized optical disc is loaded and additional recording is performed on this optical disc. However, this prior art also deletes the DVD-R optical disc without unfinalization. A process for restoring a title (such as a title treated as a hidden title) corresponding to the stored title information is not disclosed.

  The present invention has been made to solve the above-described problems, and restores titles (such as titles that are treated as hidden titles) corresponding to title information that has been deleted unfinalized on DVD-R optical discs. An object of the present invention is to provide an optical disc recording / reproducing apparatus that can be reproduced.

  In order to achieve the above object, the invention according to claim 1 determines that the inserted optical disk is an unfinalized optical disk, and a finalize determination means for determining whether the optical disk is an unfinalized optical disk. A first title information acquisition unit that acquires title information from the recording management area of the optical disc, a second title information acquisition unit that searches and acquires title information from the top recording area of the optical disc, Deletion title information determination for determining whether there is deleted title information by comparing the title information acquired by one title information acquisition unit with the title information acquired by the second title information acquisition unit Means and the deleted title information after it is determined that there is the deleted title information. A title information reading means for reading the deleted title information and a title reproducing means for reproducing the title according to the read title information when receiving an instruction to reproduce the title corresponding to the title information. An optical disc recording / reproducing apparatus is provided.

  In this configuration, when it is determined that the inserted optical disk is an unfinalized optical disk, title information is acquired from the recording management area of the optical disk, and title information is acquired from the top recording area of the optical disk. When it is determined that there is deleted title information by comparing the two title information, and when an instruction to reproduce the deleted title is received, the deleted title information is read, and according to the title information The deleted title is reproduced from the optical disc.

  According to this configuration, the title that has been deleted in the unfinalized state of the optical disc is deleted from the title information acquired in the recording management area, but the title information acquired from the recording management area and the first recording area of the optical disc Using the title information retrieved and retrieved from the title, the title corresponding to the deleted title information can be determined and reproduced. That is, a title (such as a title treated as a hidden title) corresponding to title information that has been deleted because the optical disc has not been finalized can be restored, which improves usability for the user.

  In the invention of claim 2, in the invention of claim 1, the first title information acquisition means acquires the last VMGI (video management information) in the DVD video format from the recording management area, and records it on the optical disc from the VMGI. Since the title information including the number of titles that have been acquired is acquired, the process of acquiring the title information from the recording management area can be realized.

  In the invention of claim 3, in the invention of claim 1, the second title information acquisition means searches the optical disc for a VTS (video title set) in a DVD video format, and uses the VTS to obtain a VTSI (video title set information). The number of titles is counted, the next character string is searched from the size of the video title set information, and the title information is acquired until there is no character string to be searched. A process of acquiring title information from the area can be realized.

  In the invention of claim 4, in the invention of claim 1, claim 2, or claim 3, the optical disc is a one-time writable DVD-R disc, so that the DVD-R disc is unfinalized. A title (such as a title treated as a hidden title) corresponding to the deleted title information can be restored.

  As described above, according to the present invention, the title that has been deleted in the unfinalized state of the optical disk is deleted from the title information acquired in the recording management area. Using the title information retrieved from the first recording area, the title corresponding to the deleted title information can be determined and reproduced. That is, for example, a title (such as a title treated as a hidden title) corresponding to title information that has been deleted from a DVD-R optical disc that has not been finalized can be restored, improving usability for the user.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a block diagram showing a configuration of an optical disc recording / reproducing apparatus according to an embodiment of the present invention.

  The optical disk recording / reproducing apparatus includes a system controller 22 that controls the entire apparatus, a spindle motor 5 that rotates the optical disk 1, an optical pickup 2 that optically writes / reads information to / from the optical disk 1, and the optical pickup. The spindle motor 5 and the sled 3 are driven through the motor driving circuit 34 according to the instruction of the system controller 22 and the sled 3 for moving the optical disc 2 in the radial direction of the optical disc 1 and the objective incorporated in the optical pickup 2 And a servo control unit 4 that performs control to move the focal position of the laser light in the vertical direction and the horizontal direction with respect to the recording surface of the optical disc 1 by moving a lens (not shown).

  The optical disc recording / reproducing apparatus also amplifies an RF signal which is a read signal from the optical pickup 2 during reproduction of the optical disc 1 and converts the RF signal output from the RF amplifier 6 into digital data. A digital signal processing unit 8 that stores data generated by performing signal demodulation processing and error correction processing according to the data format of the optical disc 1 in a RAM 7 as a buffer memory, and a digital signal processing unit 8 according to an instruction from the system controller 22 Is provided with a stream separation unit 9 that separates audio data, sub-picture data, and video data from the data stream output from.

  The optical disc recording / reproducing apparatus also receives an audio decoder 11 that receives the audio data output from the stream separation unit 9 and performs a predetermined decoding process, and temporarily stores the data to perform the decoding process in the audio decoder 11. The RAM 10 to be stored in the sub-picture decoder 13, the sub-picture decoder 13 that inputs the sub-picture data output from the stream separation unit 9 and performs a predetermined decoding process, and the sub-picture decoder 13 temporarily stores the data to perform the decoding process. A video MPEG decoder 15 that receives the video data output from the stream separation unit 9 and decodes it in MPEG, and temporarily stores the data for decoding in the video MPEG decoder 15. RAM 14 for storing.

  The optical disk recording / reproducing apparatus also includes a video processor 17 that synthesizes the data output from the video MPEG decoder 15 and the data output from the sub-picture decoder 13 in accordance with an instruction from the system controller 22, and the video processor 17. A video encoder 18 that converts the output synthesized data into a video signal for display and displays an image on the display device 20, and an audio circuit (not shown) that converts the data output from the audio decoder 11 into an analog audio signal. For example, a D / A converter 16 supplied to the speaker 19 is provided.

  The optical disc recording / reproducing apparatus also performs various operations such as a recording key for giving a recording instruction to the system controller 22, a reproducing key for giving a reproducing instruction, and a stop key for giving a recording / reproducing stop instruction. A remote controller 21 having keys and a main body operation unit (not shown) having fewer operation keys than the operation keys of the remote controller 21 are provided. In addition, this optical disk recording / reproducing apparatus performs a calculation process according to the flash ROM 23 storing a program and data for controlling each component of the apparatus and controlling the entire apparatus, and the program and data of the flash ROM 23. A CPU 24 for controlling the system controller 22 and a RAM 27 for temporarily storing data necessary for arithmetic processing of the CPU 24 are provided.

  The optical disk recording / reproducing apparatus also includes a tuner 29 connected to an antenna 28, an analog video / audio signal of a television broadcast selected by the tuner 29, or a television receiver or other video / audio output not shown. An A / D conversion circuit 30 that converts a video / audio signal from a device into digital video / audio data, an MPEG encoder 31 that encodes the video / audio data in MPEG, and the encoded video / audio data (hereinafter referred to as encoded data). RAM 32 as a buffer memory for temporarily storing a predetermined amount of data, ATAPI (AT Attachment Packet Interface) 33 as an interface connected to the recording data modulation circuit 25, and encoded data sent from the ATAPI 33 to the optical disc 1 Note that the modulation is applied to record. A data modulation circuit 25; and a laser modulation circuit 26 that outputs a laser modulation signal for modulating the laser beam emitted from the optical pickup 2 to the optical pickup 2 based on the modulation data modulated by the recording data modulation circuit 25. I have.

  The system controller 22 is characterized by the finalization determining means 221 for determining whether or not the inserted optical disk 1 is an unfinalized optical disk, and the optical disk 1 is an unfinalized optical disk. The first title information obtaining means 222 for obtaining title information from the recording management area of the optical disc 1 and the second title obtained by searching for and obtaining title information from the first recording area of the optical disc 1 There is title information deleted by comparing the title information acquired by the information acquisition means 223 and the title information acquired by the first title information acquisition means 222 with the title information acquired by the second title information acquisition means 223. Deleted title information determining means 224 for determining whether or not, After it is determined that there is deleted title information, when receiving an instruction to reproduce a title corresponding to the deleted title information, title information reading means 225 for reading the deleted title information, and the reading Title reproducing means 226 for reproducing the title according to the title information.

  FIG. 2 is a data structure diagram of an optical disc in the DVD video format in this embodiment. As shown in FIG. 2A, an optical disc in the DVD video format is divided into a lead-in (Lead in), a data zone, and a lead-out (Lead out) from the innermost side which is the top recording area side. Desired video data or the like is recorded.

  Here, the data zone includes, from the lead-in side, a UDF area A1 that is a file system area in which a UDF (Universal Disc Format) bridge configuration is described, a VMG (Video Management) area A2 that is a DVD management information area, and a VTS (Video Title Set (video title set) is divided into real-time data recording areas A3. The UDF area A1 and the VMG area A2 are management information recording areas for managing files based on video data recorded on the optical disc.

  Of these UDF area A1 and VMG area A2, VMG area A2 is an area corresponding to a file management system specific to the DVD video format, and is used for managing the entire video data recorded in real-time data recording area A3. Information TOC (Table Of Contents) is recorded. On the other hand, the UDF area A1 is an area corresponding to a file management system by a computer, and management for managing the entire video data recorded in the real-time data recording area A3 in a format compatible with the file system in the computer. Information is recorded.

  The real-time data recording area A3 is a user area for recording actual data. As shown in FIG. 2B, video data is recorded in units of VTS (Video Title Set). As shown in FIG. 2 (C), the VTS has VTSI (Video Title Set Information), VTSM VOBS (Video Object Set for the VTSM), VTSTT VOBS (Video Object Set for Titles in a VTS) and VTSI BUP (Backup of VTSI). Video data in the format of MPEG (Moving Picture Experts Group) 2, which is actual data, is recorded in the VTSTT VOBS, and recording position information, which is management information for managing the video data based on the actual data, is recorded in the VTSI. To be recorded. In the VTSTT VOBS, a title menu of video data is recorded. Note that VTSTT VOBS is an option. The VTSI BUP is a backup of VTSI.

  With this information, in this type of optical disk, when accessed by a computer, a desired file can be searched and reproduced by UDF, and when reproduced by a DVD player or DVD recorder, it is in VMG. The VMGI can search and play a desired file.

  As a method for writing video data on such an optical disc, there are an INC (Incremental Recording) method and a ROW (Restricted Over Write) method. Here, the INC method is a method of recording video data sequentially, and the ROW method is a recording method applied to an overwritable optical disc. However, even in the ROW method, when data is recorded in an unrecorded area, video data is recorded sequentially. In these INC system and ROW system, recording management information in an RMA (Recording Management Area) provided on the inner circumference side in the lead-in allows processing to be performed on the optical disk after recording reservation or recording completion. It is made to be managed.

  FIG. 3 shows a recording procedure by the INC method for recording information on a once writable DVD-R optical disc. In the ICN system, it is defined that up to three areas are written at a time, and these are called Rzones, and each Rzone is managed by RMA record management information.

  That is, when recording a moving image, in the ICN method, as shown in FIG. 3A, Rzone is reserved first. Here, the Rzone reservation defines Rzone1 that forms a UDF area and a VMG area, which are recording areas for management information, and then, in the unrecorded area that forms a real-time data recording area, the VTSI of the first VTS, This is executed by defining the Rzone 2 area forming the VTSM VOBS and defining the remaining unrecorded area as the Invisible Rzone area. In the ICN system, a recording area for management information is secured by reserving Rzone 1 and Rzone 2, and an area for forming VTSI and VTSM VOBS of the first VTS is secured.

  In the INC system, VTSTT VOBS based on actual data is formed by sequentially recording video data from the leading end side of the Invisible Rzone. Further, when the recording of the actual data for one title is completed according to the user's instruction, as shown in FIG. 3B, the VTSI BUP is recorded following the recording of the actual data, and as shown in FIG. Thus, VTSI and VTSM VOBS are formed in Rzone 2 based on the head side, and Rzone 2 is closed. Thereby, in the INC system, one VTS is recorded on the optical disc.

  Further, when the next title is continuously recorded, in the ICN method, as shown in FIG. 3D, Rzone 3 is reserved in the remaining unrecorded area to secure VTSI and VTSM VOBS areas, and the Invisible Rzone Define Subsequently, as shown in FIG. 3 (E), VTSTT VOBS is formed by recording actual data, and then VTSI BUP is formed. As shown in FIG. 3 (F), VTSI, VTSM VOBS is formed. As a result, the subsequent VTS is recorded on the optical disc as shown in FIG. In the INC method, when a title is continuously recorded, an unrecorded area is similarly defined and VTSs are sequentially recorded.

  On the other hand, with respect to the optical disc in which the VTS is sequentially recorded and the real-time data recording area is formed in this way, in the INC system, as shown in FIG. An area and a VMG area are formed, and lead-in and lead-out are formed, thereby achieving compatibility with a read-only optical disc. The formation of the UDF area and the VMG area is performed by generating UDF and VMG data from the VTSI and VTSM VOBS data of each title, recording this data in Rzone1, and closing Rzone1.

  FIG. 4 shows that a title (such as a title treated as a hidden title) corresponding to title information deleted in an unfinalized state after information is recorded on the DVD-R optical disc in this embodiment can be reproduced. It is a flowchart which shows the process for. Referring to this flowchart and FIGS. 1 to 3, after information is recorded on the DVD-R optical disk, a title (such as a title treated as a hidden title) corresponding to title information that has been deleted in an unfinalized state is displayed. Processing for enabling reproduction will be described.

  Here, the title information acquired from the RMA on the optical disc and the title information acquired by searching from the top recording area of the optical disc are used to determine the deleted title information, and the title corresponding to the title information However, when the RMA title information on the optical disc is deleted, the title information is not obtained from the RMA, but the data is analyzed from the top recording area of the optical disc, and the “DVDVIDEO-VTS” Title information can be acquired by searching for a character string code, and the title including the deleted title can be reproduced.

  First, when the optical disk 1 is inserted, the system controller 22 detects the insertion of the optical disk 1 (step S1), rotates the optical disk 1 for a predetermined time and drives the optical pickup 2 to obtain disk information from the RMA of the optical disk 1. A so-called mounting process, which is a reading process, is performed (step S2), and it is determined from the disk information whether the optical disk 1 is a DVD-R (step S3).

  When it is determined that the optical disk 1 is a DVD-R, the finalization determination means 221 of the system controller 22 includes whether or not the inserted optical disk 1 is an unfinalized optical disk in the disk information. The determination is made based on finalization information (step S4). When it is determined that the optical disc is an unfinalized optical disc, the first title information acquisition unit 222 of the system controller 22 starts processing for acquiring title information from the RMA (see FIG. 2) of the optical disc 1 (step S5). ).

  When the process of acquiring the title information from the RMA of the optical disc 1 is started, the first title information acquisition unit 222 acquires the last VMGI among the VMGIs recorded on the optical disc 1 based on the RMA recording management information ( In step S6), title information including the number of titles recorded on the optical disc 1 is acquired from the last VMGI (step S7).

  Next, when the second title information acquisition unit 223 of the system controller 22 detects that the acquisition of title information including the number of titles recorded on the optical disc 1 from the last VMGI is completed (step S8), the optical disc 1 A process for searching for and acquiring title information from the first recording area is started (step S9). When the process of searching for and acquiring title information from the first recording area of the optical disc 1 starts, the second title information acquisition unit 223 searches for VTS (see FIGS. 2 and 3) and VTSI (see FIGS. 2 and 3). 3) (step S10), the number of titles is counted (step S11), the next character string is searched from the size of VTSI (step S12), and if there is no character string to be searched (step S13). Then, it is determined that the acquisition of title information from the top recording area of the optical disc 1 has been completed (step S14).

  Next, the deletion title information determination unit 224 of the system controller 22 compares the title information acquired by the first title information acquisition unit 222 with the title information acquired by the second title information acquisition unit 223. Thus, it is determined whether there is deleted title information (step S15). That is, if the title information acquired at the start of the process at step S5 is compared with the title information acquired at the start of the process at step S9, there may be a difference between the title information. Therefore, if different points appear in both the title information, the title information at this time corresponds to the deleted title information, and therefore it is determined that there is deleted title information.

  Here, when it is determined that there is the deleted title information, for example, by displaying a message that there is deleted title information on the display device 20, the user has the deleted title information. If the remote controller 21 is operated and the reproduction of the title corresponding to the deleted title information is instructed, the title information reading means 225 of the system controller 22 instructs the reproduction of the title corresponding to the deleted title information. Detected (step S16) and reads the deleted title information (step S17), whereby the title reproducing means 226 controls the optical pickup 2 and deletes it from the optical disc 1 according to the read title information. The selected title is reproduced (step S18).

  When it is determined in step S4 that it is not an unfinalized optical disk (that is, when it is determined that the optical disk 1 has been finalized) or in step S15, it is determined that there is no deleted title information. When the playback instruction for the deleted title is not given in step S16, when the user gives a playback instruction by operating the remote controller 21, the title playback means 226 of the system controller 22 detects the playback instruction. (Step S19), the optical pickup 2 is controlled to reproduce the title from the optical disc 1 (Step S18).

  As described above, according to the present embodiment, the title that has been deleted in the unfinalized state of the optical disc is deleted from the title information acquired by the RMA, but the title information acquired from the RMA and the beginning of the optical disc are deleted. Using the title information retrieved from the recording area, the title corresponding to the deleted title information can be determined and reproduced. That is, for example, a title (such as a title treated as a hidden title) corresponding to title information that has been deleted from a DVD-R optical disc that has not been finalized can be restored, improving usability for the user.

  INDUSTRIAL APPLICABILITY The present invention can be used for a DVD recorder that records / reproduces information with respect to a DVD, and allows a portion that has been deleted unfinalized on a DVD-R optical disc to be restored and reproduced.

It is a block diagram which shows the structure of the optical disk recording / reproducing apparatus which concerns on one Embodiment of this invention. 3 is a data structure diagram of an optical disc in a DVD video format in the embodiment. FIG. FIG. 3 is a data structure diagram showing a recording procedure by an INC method for recording information on a once writable DVD-R optical disc in the embodiment. 6 is a flowchart showing a process for enabling playback of a title corresponding to title information that has been deleted in an unfinalized state after information is recorded on a DVD-R optical disc in the embodiment. It is a data structure figure which shows the change of the recording data of DVD by finalization.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Optical disk 221 Finalization determination means 222 1st title information acquisition means 223 2nd title information acquisition means 224 Deleted title information determination means 225 Title information reading means 226 Title reproduction means

Claims (4)

In an optical disc recording / reproducing apparatus for recording information on an optical disc or reproducing information recorded on an optical disc,
Finalization determination means for determining whether the inserted optical disk is an unfinalized optical disk;
First title information acquisition means for acquiring title information from a recording management area of the optical disc when it is determined that the optical disc is an unfinalized optical disc;
Second title information acquisition means for searching and acquiring title information from the top recording area of the optical disc;
Deletion title for determining whether there is deleted title information by comparing the title information acquired by the first title information acquisition unit and the title information acquired by the second title information acquisition unit Information determination means;
Title information reading means for reading the deleted title information when receiving an instruction to reproduce the title corresponding to the deleted title information after it is determined that the deleted title information is present;
An optical disc recording / reproducing apparatus comprising: title reproducing means for reproducing the title according to the read title information.   The first title information acquisition means acquires the last VMGI (video management information) in the DVD video format from the recording management area, and acquires title information including the number of titles recorded on the optical disc from the VMGI. The optical disc recording / reproducing apparatus according to claim 1.   The second title information acquisition unit searches the optical disc for a VTS (video title set) in a DVD video format, acquires VTSI (video title set information) from the VTS, counts the number of titles, 2. The optical disc recording / reproducing apparatus according to claim 1, wherein the next character string is searched from the size of the set information, and the title information is acquired until there is no character string to be searched.   4. The optical disc recording / reproducing apparatus according to claim 1, wherein the optical disc is a one-time writable DVD-R disc.

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