JP4886625B2 - Disc playback apparatus and disc playback method - Google Patents

Description

  The present invention relates to a disc playback apparatus that plays back information recorded on a DVD (Digital Versatile Disk), which is an optical disc, and more particularly to a disc that can perform playback processing smoothly when the main search is performed and the main playback is performed. The present invention relates to a playback apparatus and a disk playback method.

  2. Description of the Related Art In recent years, disk reproducing apparatuses that record information such as audio signals and video signals on an optical disk (DVD) that conforms to the DVD-Video standard and reproduce the information have become widespread. Also, a DVD (for example, a movie disc) usually has one title for the main content, and one title is divided into a plurality of chapters.

  In addition to the main part, the movie disc includes a setup screen, a menu screen, a commercial screen, and the like. In addition, with the widespread use of DVD-Video, many discs tend to enrich and record privilege videos and the like. Furthermore, the disk reproducing apparatus is adopted not only for home use but also for in-vehicle use, and its use environment is various.

  Further, when reproducing such a DVD, the disc reproducing apparatus reproduces it according to a reproduction procedure designated in advance based on the file structure information recorded on the DVD.

  For example, if the information on the menu screen is recorded on the DVD, the menu screen is displayed, and the user is allowed to select a desired item from a plurality of menu items, and the screen is moved to the next screen. In addition, a commercial screen, a copyright notice screen, and the like may be displayed, and it may take a lot of time and effort until the main part is played after the playback operation.

  In addition, since information indicating the main part is not recorded on the DVD, it is difficult to detect which is the main part content in a DVD including a plurality of titles, and the main part can be reproduced immediately by a simple operation. It was difficult to do.

  In particular, an in-vehicle disc player may be operated by an unfamiliar user (for example, a child), and it is not preferable in terms of safety if the driver operates while teaching the operating procedure. Therefore, there are many users who want to realize a disc reproducing apparatus that can reproduce the main part with a simple operation.

  Japanese Patent Application Laid-Open No. 2004-133620 describes a disc playback apparatus that has a main search function and shortens the time until playback of a main part starts after a playback operation. In the example of Patent Document 1, title number detection means and reproduction time detection means are provided, and the title with the longest reproduction time is detected as the main part and is reproduced.

However, even when the main part is detected and played, depending on the navigation command (Navigation Command) recorded on the DVD, playback may be executed after moving to another title. Content other than the selected title may be played.
JP 2005-86717 A

  With the disc playback device of Patent Document 1, it is possible to play back the main part with a simple operation by providing the main part search function. However, it is different from the title intended by the user by the navigation command recorded on the DVD. May be played.

  The present invention has been made in view of such circumstances, and a disc reproducing apparatus capable of starting reproduction of a main part with a simple operation and preventing contents other than the main part from being reproduced in the main part search mode. And a disc reproducing method.

According to a first aspect of the present invention, there is provided a disc reproducing apparatus for searching for a title of a main part of the optical disc by using a pickup unit for reading information recorded on the optical disc and video management information included in the information read by the pickup unit. Main mode search unit, and a first mode for reproducing the content recorded on the optical disc in a procedure according to the video management information, or a second mode for reproducing the main unit based on a search result by the main unit search unit a reproduction processing unit that reproduces in the, when reproducing the main in the second mode, the movement to the non main title until the reproduction from the search of the main title of the main starts When a navigation command to be instructed is detected, the reproduction processing unit is controlled to perform reproduction processing while avoiding the movement instruction. Characterized by comprising a control unit, a.

According to a fifth aspect of the present invention, there is provided a disc reproducing apparatus for searching for a title of a main part of the optical disc by using a pickup unit for reading information recorded on the optical disc and video management information included in the information read by the pickup unit. Main mode search unit, and a first mode for reproducing the content recorded on the optical disc in a procedure according to the video management information, or a second mode for reproducing the main unit based on a search result by the main unit search unit a reproduction processing unit that reproduces in the, when reproducing the main in the second mode, a navigation command for instructing to move to the non main title during playback end from the main playback start And a control unit that controls the reproduction processing unit so as to perform the reproduction processing while avoiding the movement instruction. To.
Characterized by

According to a sixth aspect of the present invention, there is provided a disc reproducing method according to the present invention, wherein information recorded on an optical disc is read by a pickup unit, and video management information included in the information read by the pickup unit is used to title the main part of the optical disc. In the first mode for reproducing the content recorded on the optical disc in the procedure according to the video management information, or in the second mode for performing the main part reproduction based on the search result, When the main command is played back in the second mode, when a navigation command instructing movement to a title other than the main program is detected between the search of the main program title and the start of playback of the main program Is a disc playback method characterized in that playback processing is performed while avoiding the movement instruction.
It is characterized by.

Furthermore, in the disc reproducing method of the present invention as set forth in claim 10 , the information recorded on the optical disc is read by the pickup unit, and the title of the main part of the optical disc is read using the video management information contained in the information read by the pickup unit. In the first mode for reproducing the content recorded on the optical disc in the procedure according to the video management information, or in the second mode for performing the main part reproduction based on the search result, When the main part is played back in the second mode, if a navigation command that instructs movement to a title other than the main part is detected between the start of playback of the main part and the end of playback, the movement instruction is avoided. Then, the reproduction process is performed.

  In the disc playback apparatus of the present invention, the main part search function allows the main part to be played back with a simple operation. In the reproduction mode by the main search, the searched main contents can be accurately reproduced without any trouble.

  Hereinafter, an embodiment of a disk reproducing apparatus of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the overall configuration of a disc playback apparatus 100 of the present invention. In FIG. 1, reference numeral 11 denotes a DVD that is an optical disk (hereinafter simply referred to as a disk 11), in which data is recorded in accordance with the DVD-Video standard. The data hierarchical structure will be described later.

The disk 11 is rotated at a constant linear velocity by the spindle motor 12. Information reproduction from the disk 11 is performed by the optical pickup 13, and the disk 11 is irradiated with laser light, and the data recorded on the disk 11 is read by the reflected light.

The optical pickup 13 is controlled to move in the radial direction of the disk 11 by the feed motor 14 and determines the reproduction position. A servo control unit 15 controls the rotation of the spindle motor 12 according to a control signal supplied from a system controller 30 and the like which will be described later, and also performs tracking control, focus control of the optical pickup 13, and driving of the feed motor 14. Take control.

Reference numeral 16 denotes an RF amplifier, which amplifies an RF signal corresponding to the data read by the optical pickup 13 and transmits it to the next stage. The RF amplifier 16 separates the focus control signal and the tracking control signal from the RF signal and sends these control signals to the servo control unit 15.

The servo control unit 15 controls an actuator (not shown) of the optical pickup 13 based on a focus control signal so that the light beam is always just focused on the disk 11. Further, the actuator is controlled based on the tracking control signal, and the movement of the optical pickup 13 in the tracking direction is controlled. Thereby, the data is reproduced accurately.

  A digital signal processing unit 17 digitizes the RF signal from the RF amplifier 16, performs demodulation processing and error correction processing of the digitized signal, and obtains data obtained in the process of signal processing by the digital signal processing unit 17. Is stored in the RAM 18. Further, the control signal is separated from the digital signal, and the separated control signal is sent to the servo control unit 15 and a system controller 30 described later.

  A stream separation unit 19 separates the signal output from the digital signal processing unit 17 into an audio bit stream, a main picture bit stream, and a sub-picture bit stream, and supplies them to the audio / video processing unit 20. The main picture bitstream is a signal compressed in accordance with the MPEG2 format, and includes video information. The sub-picture bitstream is a signal compressed according to the run-length compression method, and includes subtitle information and the like.

  An audio decoder 21 decodes the audio bit stream separated by the stream separation unit 19 and outputs a digital audio signal. The digital audio signal output from the audio decoder 21 is converted into an analog audio signal by the D / A converter 22, and the analog audio signal is output from the speaker 23 via a power amplifier (not shown).

  A video decoder 24 decodes the main picture bit stream separated by the stream separation unit 19. Reference numeral 25 denotes a sub-picture decoder, which decodes the sub-picture bit stream separated by the stream separation unit 19. A video processor 26 digitally synthesizes the main picture output from the video decoder 24 and the sub-picture output from the sub-picture decoder 25.

  A video encoder 27 converts the synthesized data output from the video processor 26 into a video signal for display. The video signal output from the video encoder 27 is supplied to a display device 28 such as a liquid crystal panel to display an image.

  An operation unit 29 such as a remote controller has a plurality of operation buttons for performing various operations such as reproduction, stop, fast forward, and volume setting. The operation unit 29 initializes the audio / subtitle information desired by the user, instructs to change the setting of the audio / subtitle information in response to an inquiry from the disk playback device 100, and is displayed on the display device 28. It is also used when making various selections by moving the cursor in the menu screen. It is also possible to select and set titles and chapters recorded on the disc 11.

  The system controller 30 includes a CPU, a ROM, and the like, and controls the overall operation of the disc playback apparatus 100 according to a program stored in the ROM. The system controller 30 receives various instruction signals from the operation unit 29, a signal from the digital signal processing unit 17, and a signal from the stream separation unit 19, and receives the servo control unit 15, the digital signal processing unit 17, and the stream separation unit 19. And the video processor 26 is controlled. A RAM 31 is connected to the system controller 30 and temporarily stores data obtained by various processes performed under the control of the system controller 30.

  The disc playback apparatus 100 of the present invention has a main search function and, in the playback mode by the main search, prohibits moving to another title for playback, so that the type of navigation command is determined, The feature is that the navigation command for instructing the movement to the title is not executed.

  In the DVD-Video standard, the playback sequence of menu screens, titles, etc. is defined by one or more program chains PGC, and program chain information PGCI is recorded to define the PGC configuration.

  FIG. 2 is a diagram for explaining the program chain information PGCI in the program chain PGC. The PGCI includes a plurality of programs PG, a command PRE_CMD to be executed at the start of PGC playback, a command POST_CMD to be executed at the end of PGC, and a description NEXT_PGCN of the PGCI to be executed next, and the playback order of the program PG is defined by the PGCI Is done.

  Further, a navigation command (hereinafter referred to as NC) is recorded in each program PG, and data is reproduced according to the navigation command NC.

  The disc 11 is recorded with a description FP_PGCI of the PGC to be reproduced first when the reproduction of the disc 11 is started, and VMGM_PGCI which is a PGCI for controlling the reproduction of the entire title. A playback sequence is defined.

  FIG. 3 is a diagram showing an example of the playback procedure of the disk 11. 3, T1, T2, T3, T4... Represent titles, for example, title T1 is a main video, T2 is a menu video, T3 is a commercial video, and T4 is a privilege video. Each title is composed of a plurality of chapters.

  FIG. 3 shows an example in which a commercial video is first played back by FP_PGCI. In addition, after the commercial video is reproduced, the display is switched to the menu screen display, and the main part is reproduced next. Such a reproduction sequence is defined by PGCI, and data is reproduced according to the navigation command NC.

  FIG. 4 is a view for explaining the data hierarchical structure of the disk 11 used in the disk playback apparatus 100 according to one embodiment of the present invention.

  The hierarchical structure of data recorded on the disk 11 is determined in accordance with the DVD-Video standard, and a lead-in area is provided on the inner periphery side of the disk 11 and a lead-out area is provided on the outer periphery side. A volume space including a DVD video area is provided.

As shown in FIG. 4 , the DVD video area includes a video manager VMG as management information and one or more video title sets VTS # 1 to VTS # n as content information.

  The management information VMG includes video manager information VMGI, a video object menu video object set VMGM_VOBS, and a VMGI backup VMGI_BUP.

  The VMGI that is video management information includes a title search pointer table TT_SRPT, the FP_PGCI, the VMGM_PGCI, and the like described above. TT_SRPT included in VMGI includes one or more title search pointers TT_SRP. The title search pointer TT_SRP is a title search pointer for title 1 to title n.

  Each TT_SRP includes a reproduction format TT_PB_TY (not shown) of the corresponding title, the number of part-of-titles (data indicating the number of chapters) PTT_Ns, and the like. Therefore, by detecting information included in the VMGI, the title, the number of titles, and the number of chapters for each title can be detected.

  On the other hand, files of individual video title sets (for example, VTS # n) include video title set information VTSI which is management information of the title, video object set menu video object set VTSM_VOBS, video title set title video object set VTSTT_VOBS ( Video content) and VTSI backup VTSI_BUP.

  Each video title set VTS includes video data compressed according to the MPEG standard, audio data compressed (or uncompressed) according to a predetermined standard, and sub-picture data subjected to run length compression according to a predetermined rule. Various information for reproducing data is stored.

  The management information VTSI includes a video title set program chain information table VTS_PGCIT and the like. VTS_PGCIT includes one or more video title set program chain information VTS_PGCI and the like. VTS_PGCI is a description to be reproduced first when the title reproduction is started.

  VTSTT_VOBS is composed of a plurality of video object identification numbers (VOB_IDN), and the hierarchical structure of data included in VOB_IDN is composed of a plurality of cells. The content (video content) of VTSTT_VOBS is specified by video objects (VOB_IDN # 1, VOB_IDN # 2,..., VOB_IDN # i) indicating one or more cells, and the playback order of the cells indicated by these VOB_IDN # is PGC Determined by.

  The Cell is composed of a plurality of video object units VOBU. The VOBU is composed of a navigation pack NV_PCK, an audio pack A_PCK, a video pack V_PCK, and a sub-picture pack SP_PCK. To do.

  Next, the main part search in the disk reproducing apparatus of the present invention will be described. In the main part search, in order to increase the detection probability of the main part, for example, the main part is determined based on the total number of titles recorded on the disc 11 and the number of chapters of each title.

  The main part judgment processing is performed by the main part search unit 300 in the system controller 30 based on various information separated and extracted from the digital signal processing unit 17 and the stream separation unit 19.

  The main part search unit 300 searches the main part as follows, for example. That is, it is determined whether or not the total number of titles recorded on the disc 11 is one. When the number of titles is 1, it is determined that the content of the detected title 1 is the main part.

  If the total number of titles is 1 or more, the main part is determined based on the number of chapters of the title and the total number of titles. For example, the number of chapters is detected for a plurality of detected titles, and content having too many chapters is likely to be a privilege video, and therefore a title is detected whether the number of chapters is within a predetermined range.

  Also, it is determined whether the total number of titles is equal to or less than a predetermined value. If the total number of titles is equal to or less than a predetermined value, the first title (title 1) is determined to be the main part. This is because a disc with a small number of titles is likely to have the main title as the first title.

  In addition, a title whose total chapter number is within a predetermined range may be detected, and a title having the maximum number of chapters among them may be determined as the main part. In any case, the main part can be judged based on the number of chapters and the number of titles. Moreover, the example described in patent document 1 may be sufficient.

  In the disc playback apparatus of the present invention, whether the playback is performed in the mode using the search result by the main search unit 300 or the playback in the normal mode (playback according to a playback procedure specified in advance) is determined by the user. Left to the operation. For example, the main search setting is performed by operating the operation unit 29 to display a setup screen on the display device 28 and operating keys.

  FIG. 5 shows an example in which the setup screen 32 is displayed on the display device 28 and the user performs various settings by operating the keys of the operation unit 29. For example, if the cursor is moved to the main search item 33 and “ON” 34 is selected, the main search mode is selected. If “OFF” 35 is selected, the main search is turned off and the normal playback mode is set.

  Therefore, when the reproduction mode by the main part search is selected based on the user operation at the time of reproducing the disc 11, the main part can be reproduced immediately without a troublesome procedure. This is particularly effective when a simple operation is required, such as playing a disc with a lot of privileged images or an in-vehicle disc player. When the normal mode is set, reproduction according to a reproduction procedure specified in advance based on information recorded on the disk 11 can be performed.

  On the other hand, in the playback mode based on the main search, the navigation command NC may cause playback not desired by the user. This will be described with reference to FIG.

  FIG. 6 is a diagram showing an operation when the main title is detected by the main search and the main mode is entered into the reproduction mode. When reproduction of the main part is started by using the main part search, a navigation command NC (Pre Command) is executed, and normally, transition is made to chapter reproduction in the main part as indicated by an arrow a1. When the reproduction of the main part is completed, the next title is reproduced by a navigation command NC (Post Command).

  On the other hand, the navigation command NC may include a command for instructing movement to another title. When such a navigation command NC is detected, the navigation command NC is assigned to another title as indicated by a dotted line b1. It moves (branches) and plays, and then transitions to the main part. For this reason, even though the main part playback mode is set, other titles are played back, so that the main part search function is not fully exhibited.

  In the navigation command NC, commands for instructing movement to other titles include, for example, CMD_LINK, CMD_LINKSINS, and CMD_JUMP commands.

  Therefore, in the disc playback apparatus 100 of the present invention, in the playback mode using the main search, the navigation commands NC of the CMD_LINK system, the CMD_LINKSINS system, and the CMD_JUMP system described above from the search of the main program title to the start of the playback of the main program. Is detected, it is assumed that the processing by the navigation command NC is satisfied, the instruction is avoided, and the main part is reproduced according to the instruction of the next navigation command NC.

  Alternatively, when a navigation command instructing movement to a title other than the main part described above is detected between the start of playback of the main part and the end of playback in the playback mode using the main part search, the processing by the navigation command NC is similarly performed. You may make it avoid an instruction as satisfying.

  The system controller (control unit) 30 detects the CMD_LINK system, CMD_LINKSINS system, and CMD_JUMP system navigation commands NC, and the system controller 30 controls the audio / video processing unit (reproduction processing unit) 20 according to the detection result. To do.

  As a result, during playback in the main search mode, the processing indicated by the dotted line b1 in FIG. 6 is avoided, the main playback is reliably performed without any trouble, and it is possible to prevent the user from moving to another title not intended by the user. it can. Note that playback in the mode using the main search is performed according to the intention of the user. Therefore, if the normal playback mode is restored, the playback specified in advance based on the file structure information recorded on the disc is performed. Can be played according to the procedure.

  As described above, in the disc reproducing apparatus of the present invention, the main part can be reproduced without any trouble by a simple operation. For example, a disc reproducing apparatus suitable for in-vehicle use can be provided.

  The present invention is not limited to the above description, and various modifications can be made without departing from the scope of the claims.

1 is an overall configuration diagram showing an embodiment of a disc playback apparatus of the present invention. Explanatory drawing which shows the data structure of PGC recorded on the disk of the embodiment. Explanatory drawing which shows an example of the reproduction | regeneration sequence of the disk in the embodiment. FIG. 3 is a diagram illustrating a hierarchical structure of data recorded on the disc according to the embodiment. Explanatory drawing which shows an example of the setup screen in the embodiment. Explanatory drawing which shows an example of the reproduction | regeneration operation | movement in the main part search mode in the embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 ... Disk 12 ... Motor 13 ... Optical pick-up 14 ... Feed motor 15 ... Servo control part 16 ... RF amplifier 17 ... Digital signal processing part 18, 31 ... RAM
DESCRIPTION OF SYMBOLS 19 ... Stream separation part 20 ... Audio / video processing part 27 ... Video encoder 28 ... Display apparatus 29 ... Operation part 30 ... System controller 300 ... Main part search part

Claims (10)

A pickup section for reading information recorded on the optical disc;
A main part search unit for searching for a title of the main part of the optical disc using video management information included in the information read by the pickup unit;
Reproduction processing for reproducing the content recorded on the optical disc in the first mode for reproducing in accordance with the procedure in accordance with the video management information or the second mode for performing the main reproduction based on the search result by the main search unit. And
When the main command is played back in the second mode, when a navigation command instructing movement to a title other than the main program is detected between the search of the main program title and the start of playback of the main program Comprises a control unit that controls the reproduction processing unit so as to perform reproduction processing while avoiding the movement instruction.  2. The disc according to claim 1, wherein the navigation command for instructing movement to a title other than the main part includes a command (CMD_LINK system, CMD_LINKSINS system, CMD_JUMP system) for instructing a link or jump to another title. Playback device. Has a user operation can be operated unit, the disc reproducing apparatus according to claim 1, wherein the user's selection operation, characterized in that the selectable reproduction process in the first or second mode.  The main part search unit detects the title of the content recorded on the optical disc and the number of chapters of each title, and determines the main part based on the detected number of chapters and the number of titles of each title. Item 4. The disk reproducing device according to Item 1. A pickup section for reading information recorded on the optical disc;
A main part search unit for searching for a title of the main part of the optical disc using video management information included in the information read by the pickup unit;
Reproduction processing for reproducing the content recorded on the optical disc in the first mode for reproducing in accordance with the procedure in accordance with the video management information or the second mode for performing the main reproduction based on the search result by the main search unit. And
When the main part is played back in the second mode, if a navigation command that instructs movement to a title other than the main part is detected between the start of playback of the main part and the end of playback, the movement instruction is avoided. And a control unit that controls the reproduction processing unit so as to perform the reproduction process. Read the information recorded on the optical disc with the pickup unit,
Search for the title of the main part of the optical disc using video management information included in the information read by the pickup unit,
A reproduction process is performed in a first mode in which content recorded on the optical disc is reproduced in a procedure according to the video management information, or in a second mode in which main content reproduction is performed based on the search result,
When the main command is played back in the second mode, when a navigation command instructing movement to a title other than the main program is detected between the search of the main program title and the start of playback of the main program Is a disc playback method characterized in that playback processing is performed while avoiding the movement instruction. When a navigation command instructing movement to a title other than the main part is detected, it is assumed that processing by the navigation command is satisfied, the instruction is avoided, and an instruction of another navigation command is executed. 7. A disk reproducing method according to claim 6 . When the navigation command for instructing movement to a title other than the main part includes a command (CMD_LINK system, CMD_LINKSINS system, CMD_JUMP system) for instructing a link or jump to another title, the instruction by the navigation command is avoided. 7. A disc reproducing method according to claim 6, wherein the reproducing process is performed. 7. The disc reproducing method according to claim 6 , wherein the second mode can be selected by a user operation. Read the information recorded on the optical disc with the pickup unit,
Search for the title of the main part of the optical disc using video management information included in the information read by the pickup unit,
A reproduction process is performed in a first mode in which content recorded on the optical disc is reproduced in a procedure according to the video management information, or in a second mode in which main content reproduction is performed based on the search result,
When the main part is played back in the second mode, if a navigation command that instructs movement to a title other than the main part is detected between the start of playback of the main part and the end of playback, the movement instruction is avoided. And performing a playback process.

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