JP4551476B2 - Information recording medium, information recording apparatus, information recording method, information reproducing apparatus, and information reproducing method - Google Patents

Description

  The present application relates to an information recording medium such as a high-density optical disk capable of recording information such as video and audio represented by DVD at a high density, a recording apparatus for recording information on the information recording medium, and the information recording medium Belongs to the technical field of a playback device for playing back information.

  Conventionally, so-called LDs (Laser Disks), CDs (Compact Disks), etc. are widely used as optical disks on which information such as video and audio is recorded.

  In these LDs and the like, video information and audio information are recorded together with time information indicating the time at which each information should be reproduced with reference to the reproduction start position of each LD or the like. For this reason, in addition to general normal playback in which recorded information is played back in the order in which they are recorded, for example, in a CD, only a desired song is extracted from a plurality of recorded songs. Or playback such as changing the playback order at random.

  However, in the LD or the like, it is said that viewers have choices regarding displayed video and reproduced audio, and reproduction that is rich in so-called interactive changes such as the viewer selecting and viewing them cannot be performed. There was a problem.

  That is, for example, after displaying a “problem” such as that found in recent game and educational PC software, a different display or audio output is made depending on the content of the “answer” input by the viewer Interactive playback (for example, if the “answer” is correct, the video and audio corresponding to the correct answer are played, and if the “answer” is incorrect, the video and audio corresponding to the error are It cannot be played).

  On the other hand, there are proposals and developments regarding interactive playback on a DVD, which is an optical disc that has an improved storage capacity about 10 times without changing the size of the optical disc itself, compared to the conventional CD. In the player that reproduces the DVD, search (search) and scan (fast check) operations can be performed in the same manner as the LD player. In other words, the DVD player that enables interactive playback as described above performs the same interactive function as a personal computer or game device with a function as a device that plays back information over time in the same manner as a conventional LD player or the like. It also has a function as a device. Therefore, when a DVD that enables interactive playback as described above is searched or scanned, the information corresponding to the “correct” or “wrong” may be played back before the “question” is played back. Comes out. Such reproduction is fundamentally contrary to the intention of the producer (software producer) and is not desirable for the viewer (software user) in the progress of the game and study.

  However, no proposal or development has been made for DVD technology for preventing reproduction that is not intended by the producer or desired by the viewer during search or scanning. Furthermore, in the interactive playback on the DVD having the two functions as described above, there is a problem that the playback that the producer does not intend and the viewer does not desire at the time of searching or scanning should be avoided. The current situation is not recognized by those skilled in the art.

  The inventors of the present application quickly paid attention to this not yet known problem, and in Japanese Patent Application No. 7-166025 which has not been known yet, (i) an addition including reproduction prohibition information indicating a reproduction condition for each fixed data group Information is added in advance, and the player determines whether or not a reproduction condition (for example, a condition that a predetermined reproduction procedure has been performed, a condition that the “problem” has been reproduced, etc.) has been satisfied. A reproduction method for permitting reproduction of video data and audio data following the reproduction prohibition information when it is determined that the reproduction condition is satisfied by continuous monitoring, and (ii) for permitting reproduction for each fixed data group Additional information including reproduction prohibition information indicating a reference value is added in advance, and is determined according to the reproduction operation status of the viewer for the software. Each player has a raw permission level, and based on the magnitude relation between the reference value included in the reproduction prohibition information and the reproduction permission level, reproduction of video data and audio data following the reproduction prohibition information is permitted. Invented a playback method.

  However, according to these methods (i) and (ii), the player must memorize the reproduction conditions and the progress of the reproduction. In particular, according to the method (i), the player monitors, for example, whether or not the reproduction of the problem is completed, and the specific bit of the built-in register is set to 1 when the reproduction is completed. Thereafter, if there is a data group having reproduction prohibition information indicating that reproduction is possible on the condition of completion, the player determines whether reproduction is possible or not based on the value of the built-in register. Therefore, if there are a plurality of branches in the software to be played back, a register having at least the number of bits corresponding to the total number of branches is required in order to make a playback permission determination for each of the branches. According to the method (ii), the player needs a register that always stores the reproduction permission level in a nonvolatile manner.

  Further, according to the methods (i) and (ii), since reproduction prohibition information is added to each data group, it is not until the pickup is actually moved to the data group and the information is read out. It will be found that playback is not allowed (ie in real time). Therefore, when scanning is performed on a data group that is not allowed to be played back, (a) the scan is suddenly interrupted after the pickup moves to this data group, or (b) to this data group. What happens to the jump until the pickup returns to another data group that is allowed to play after the pickup moves and then starts playing that part, or (c) finds another data group that is allowed to play It will be repeated many times. The operation as described in the above (a) is not fundamentally suitable for the purpose of reproducing another original part of the scan. Further, the operation as described in the above (b) makes it impossible to scan across the unreproducible part, and it is not suitable for the purpose of moving to a place away from the original front or rear of the scan. Furthermore, in the operation as described in (c) above, when the portion that cannot be reproduced is long, the period during which the reproduction is not performed continues despite the scanning operation, which is very convenient for the viewer. bad. In particular, if such an operation is repeated at the first or last part of the disk, there is a disadvantage that the scanning is stopped as it is.

  As described above, according to the reproducing method invented by the present inventors, the original function of scanning is incomplete.

  Therefore, an object of the present invention is to prevent the reproduction of information that should not be reproduced during special reproduction such as scanning or search in interactive reproduction, and to enable smooth special reproduction. It is an object to provide an information recording medium, and a recording apparatus and a reproducing apparatus thereof.

In order to solve the above problems, the invention described in claim 1 is an information recording medium reproduced by an information reproducing apparatus, each of which includes a plurality of first data groups each including video information, and a plurality of data groups. of said first plurality of second data group including data groups, respectively, and a plurality of third data group constituted by combining a plurality of said second data groups, each of said second Management information for each of the second data groups, including prohibition information indicating permission or prohibition of special reproduction by the information reproduction apparatus for the data group, and time information of each of the second data groups, and each of the third data groups . and the additional information for each third data groups for controlling reproduction of each data group, are recorded, wherein management information, you are recorded in different positions relative to each of said data groups , The information reproducing apparatus is the reproducing said video information based on the management information read by all of the plurality of management information of a plurality of said second data groups constituting one of the third data group, the All of the plurality of management information of the plurality of second data groups included in the additional information of one of the third data groups is included in the other one of the third data groups. , that includes all within the additional information of the other one of the third data group.

In order to solve the above problems, the invention described in claim 2 is an information recording apparatus for recording the recording information including the video information on the information recording medium according to claim 1, wherein each data group includes: The management information is recorded at different positions, and all of the plurality of management information of the plurality of second data groups constituting one of the third data groups is stored in the one third data. All of the plurality of management information of the plurality of second data groups constituting the other third data group is recorded in the additional information of the group, and the other one of the third data groups. And recording means for recording in the additional information of the three data groups .

In order to solve the above problems, the invention according to claim 3 is an information recording method for recording record information on the information recording medium according to claim 1, wherein the information is recorded at different positions with respect to the data groups . The management information is recorded , and all of the plurality of management information of the plurality of second data groups constituting one of the third data groups is recorded as the additional information of the one third data group. And recording all of the plurality of management information of the plurality of second data groups constituting another one of the third data groups in the other one of the third data groups. Record in the additional information .
In order to solve the above-mentioned problem, the invention according to claim 4 is an information reproducing apparatus for reproducing recorded information from the information recording medium according to claim 1, wherein the video information, the additional information, Based on the reading means for reading the management information from the information recording medium, the additional information, and the management information , the reproduction means for reproducing the video information, and the prohibition information in the management information is the And a control unit that controls the reproduction unit to prohibit the special reproduction of the target second data group when the special reproduction is prohibited.
In order to solve the above problem, the invention described in claim 5 is an information reproducing method for reproducing recorded information from the information recording medium described in claim 1, wherein the video information, the additional information, Based on the reading process of reading out the management information, the additional information, and the management information , the playback process of playing back the video information, and the prohibition information in the management information prohibits the special playback. If that shows, and a control process of controlling the reproduction of the video information in the regeneration step so as to prohibit the special reproduction of the second data group of interest.

It is a conceptual diagram which shows the physical structure of the data in DVD as one embodiment of this invention. It is a conceptual diagram which shows the logical structure of the data in DVD of FIG. It is a conceptual diagram which shows the structure of the interleaved unit in DVD of FIG. 2 is a table showing a data structure of a cell reproduction information table provided in the DVD of FIG. FIG. 5 is a conceptual diagram showing a data structure of cell attribute information in the cell reproduction information table of FIG. 4. 2 is a table showing a data structure of DSI provided in the DVD of FIG. 1. It is a conceptual diagram which shows the data structure of the reproduction | regeneration prohibition information in DSI of FIG. It is a block diagram of the information recording device for recording the DVD of FIG. 1 as another embodiment of the present invention. It is a block diagram of the information reproducing | regenerating apparatus for reproducing | regenerating the DVD of FIG. 1 as other embodiment of this invention. 10 is a flowchart showing a search operation of the information reproducing apparatus in FIG. 9. 10 is a flowchart showing a scanning operation of the information reproducing apparatus in FIG. 9. It is a conceptual diagram which shows the scanning operation | movement of the information reproduction apparatus of FIG. It is a conceptual diagram which shows the normal reproduction | regeneration operation | movement of the information reproduction apparatus of FIG. It is a conceptual diagram which shows the special reproduction | regeneration operation | movement of the information reproduction apparatus of FIG.

  Next, preferred embodiments of the present invention will be described. The embodiment described below is an embodiment in which the present invention is applied to the above-described DVD.

In the following embodiments, an example of each constituent element in the scope of the claims shown on the left side of the following list is composed of elements shown on the right side of the following list.
First data group: VOBU (VOB-Unit)
Second data group: Cell management information: Cell playback information table (in PGCI )
Prohibited information: first reproduction prohibit flag (in the cell playback information table)

(I) Embodiment of Information Recording Medium First, the physical and logical configuration and operation of a DVD which is an embodiment of an information recording medium to which the present invention is applied will be described with reference to FIGS. I will explain.

  First, a recording format (physical recording format) of video information and audio information on a DVD will be described with reference to FIG.

  As shown in FIG. 1, the DVD 1 according to the embodiment has a lead-in area LI at its innermost peripheral part and a lead-out area LO at its outermost peripheral part. Are divided into a plurality of VTSs 3 (VTS # 1 to VTS # n) each having an ID (identification) number and stored. Here, VTS (Video Title Set) refers to a title (such as a movie, etc.) that a producer intends to present to the viewer (same attributes such as audio, sub-picture stream number and specifications, and corresponding language). More specifically, for example, a plurality of movies having different language lines or the like are recorded as titles for the same movie, or, for example, Even in the same movie, the movie version and the special version are stored as different titles. In addition, the video manager 2 is recorded at the head of the area where the VTS 3 is recorded. The information recorded as the video manager 2 is recorded on the DVD 1 such as a menu for accessing each title, information for preventing illegal copying, or an access table for directly accessing each title. Information related to the entire video information and audio information is recorded.

  Next, one VTS 3 is divided and recorded into a plurality of VOBs 10 each having an ID number, starting with the control data 11. Here, a portion constituted by a plurality of VOBs 10 is referred to as a VOB set (VOBS). This VOB set is a VOB set for the entity part in order to distinguish between control data 11 which is other data constituting the VTS 3 and a plurality of VOB 10 parts which are entities of video information and audio information. .

  The control data 11 recorded at the head of the VTS 3 includes information such as PGCI (Program Chain Information) which is various information related to a program chain which is a logical division combining a plurality of cells (cells will be described later). Is recorded. In addition to the control information, each VOB 10 is recorded with video information and audio information entity portions (video or audio itself other than the control information).

  Furthermore, one VOB 10 includes a plurality of cells 20 each having an ID number. Here, one VOB 10 is configured to be completed by a plurality of cells 20, and one cell 20 does not straddle two VOBs 10.

  Next, one cell 20 includes a plurality of VOB units (VOBU) 30 each having an ID number. Here, the VOB unit 30 is an information unit including each of video information, audio information, and sub-video information (referring to sub-video information such as subtitles in a movie).

  One VOB unit 30 is composed of a navigation pack 41 for control information, a video pack 42 for video information, an audio pack 43 for audio information, and a sub-picture pack 44 for sub-video information. Yes. Here, a packet including video data is recorded in the video pack 42, and a packet including audio data is recorded in the audio pack 43. Further, in the sub-picture pack 44, packets including characters such as characters and graphics as sub-pictures are recorded. As shown in FIG. 1, in the video pack 42 having a large amount of data, one or a plurality of GOPs are recorded inside one VOB unit 30, and an audio pack 43 and a sub-picture pack 44 are arranged between the video packs 42. Has been. The standard stipulates that there are 8 types of audio that can be recorded on the DVD 1 and 32 types of sub-video that can be recorded. Further, the navigation pack 41 is always present in one VOBU 30, but each of the video pack 42, the audio pack 43, and the sub-picture pack 44 is not necessarily present. Be free.

  Finally, the NAVI pack 41 includes DSI including search information (specifically, an address on the DVD 1 in which the video or audio to be displayed is recorded) for searching for the video or audio or the like to be displayed. (Data Search Information) packet 51 and a PCI (Presentation Control Information) packet 50 including information related to display control when displaying a video searched based on information of DSI packet 51 or generating sound Furthermore, all video data included in one VOBU is composed of one or more GOPs (Group Of Pictures). Note that the PCI pack 50 includes highlight information defining a display and an operation when the item is selected for a selection item selected by the viewer. Depending on the highlight information, for example, on the screen (the so-called menu screen) on which the item to be selected by the viewer is displayed, the screen display changes with respect to the selected item, the display position to be changed, and the command (selected). The instruction to be executed corresponding to the selected item) is set.

  Here, video information for configuring and displaying a frame, a selection button, and the like necessary for configuring and displaying the menu screen is recorded as the sub-picture pack 44 as the above-described sub-video information.

  Further, the GOP can be independently played back as defined in the MPEG2 (Moving Picture Experts Group 2) standard, which is an image compression method employed when recording video information on the DVD 1 in the present embodiment. The smallest image unit.

  Here, the outline of the MPEG2 system will be described. In general, in continuous frame images, frame images before and after one frame image are often similar to each other and have a mutual relationship. The MPEG2 system pays attention to this point, and based on a plurality of frame images transferred several frames apart, another frame image existing between the plurality of frame images is interpolated based on the motion vector of the original image. It is a method to generate by. In this case, when recording the other frame image, it is only necessary to record the information about the difference and motion vector between the plurality of frame images. Thus, the other frame image can be reproduced. As a result, compressed recording of images becomes possible. In the MPEG2 system, a variable rate system is employed in which the amount of data included in each GOP is not constant.

  In the hierarchical structure recording format shown in FIG. 1 described above, each section can be recorded by the producer by freely setting the section according to the intention. By performing reproduction based on the logical structure described later for each of these sections, various reproductions with various changes can be made.

  Next, a logical format (logical structure) in which information recorded by the physical division shown in FIG. 1 is combined will be described with reference to FIG. Note that the logical structure shown in FIG. 2 does not actually record information on the DVD 1 in that structure, but the logical structure shown in FIG. Information (access information, time information, etc.) to be reproduced together is recorded on the DVD 1, particularly in the control data 11. That is, in the DVD 1, the cell 20 constitutes a logically divisible unit for reproduction. For example, the above-mentioned “question” is one cell, “correct” is one cell, “wrong” is one cell, and so on.

  For clarification of the description, starting from the lower hierarchy of FIG. 2, by selecting and combining a plurality of cells 20 from the physical structure described in FIG. It is logically constructed based on the intention of the producer. The program 60 is also a minimum logical unit that can be accessed by a command by a system controller in a playback apparatus described later by identifying a partition. The producer can also define a group of one or more programs 60 as a minimum unit that the viewer can freely select and view, and this unit is referred to as PTT (Part Of Title).

  In addition, since one program 60 is logically configured by selecting a plurality of cells 20, one cell 20 is used in a plurality of programs 60, that is, one cell 20 is used in a plurality of different programs 60. It is also possible to reuse the so-called cell 20 to be reproduced.

  Here, the number of one cell 20 is treated as a cell ID number when the cell 20 is handled in the physical format shown in FIG. 1 (shown as cell ID # in FIG. 1), and is shown in FIG. When handled in the logical format, the cell numbers are handled in the order of description in PGCI described later.

  Next, a plurality of programs 60 are combined to logically configure one PGC (Program Chain) 61 based on the intention of the producer. The above-described PGCI (Program Chain Information) is defined in units of the PGC 61, and the PGCI has a playback order of each program 60 when each program 60 is played back. A program number is assigned), a cell playback order (a unique cell number is assigned to each cell by this playback order), an address that is a recording position on the DVD 1 of each cell 20, and a program 60 The number of the first cell 20 to be reproduced, the reproduction method of each program 60 [when information is recorded on the DVD 1 of the present embodiment, random reproduction (random reproduction by random numbers; ), Shuffle playback (random playback with random numbers similar to random playback) However, the same program 60 is reproduced only once, and the same program 60 is not reproduced a plurality of times) or loop reproduction (reproducing one PGC 61 many times) or A producer can select and reproduce a reproduction method based on a combination of loop reproduction and random reproduction or shuffle reproduction. ] And various commands (commands that can be specified by the producer for each PGC 61 or cell 20). As described above, the recording position of the PGCI on the DVD 1 is in the control data 11 or in the control data (not shown) in the video manager 2 if it is PGCI related to the menu in the video manager 2 ( (See FIG. 1).

  In addition to the PGCI, one PGC 61 includes data such as substantial video and audio as a combination of programs 60 (in other words, a combination of cells 20).

  Furthermore, in one PGC 61, it is possible to reuse the cell 20 shown in the description of the program 60 (that is, the same cell 20 is used by different PGC 61). The cell 20 to be used is reproduced regardless of the order stored in the DVD 1 in addition to the method of reproducing the cells 20 in the order stored in the recording tracks on the DVD 1 (reproduction of continuously arranged cells). The producer can select a method (for example, reproduction of non-continuously arranged cells) (for example, the cell 20 recorded later on the recording track is reproduced first).

  Next, one title 62 is logically configured by one or a plurality of PGCs 61. The title 62 is a unit corresponding to, for example, one movie, and is complete information that the producer wants to provide to the viewer of the DVD 1.

  One or more titles 62 logically constitute one VTS 63. The titles 62 included in the VTS 63 have common attributes. For example, a movie in a different language corresponds to each title 62 for one same movie. Further, information corresponding to one VTS 63 shown in FIG. 2 corresponds to information included in one VTS 3 shown in FIG. That is, all information included in the logical VTS 63 shown in FIG. 2 is recorded as one VTS 3 on the DVD 1.

  Based on the logical format described above, the producer designates the information divided in the physical structure on the DVD 1 to form a video (movie or the like) to be viewed by the viewer.

  In the description of the physical structure shown in FIG. 1, it has been described that a plurality of cells 20 are recorded in the order of ID numbers in order to facilitate understanding of the contents. In some cases, one cell 20 may be divided and recorded into a plurality of interleaved units IU shown in FIG.

  That is, for example, as shown in FIG. 3, the producer configures one PGC 61A with the cells 20 having ID numbers 1, 2, and 4, and the other PGC 61B with the cells 20 having ID numbers 1, 3, and 4. Considering the case, when reproducing information from the DVD 1 based on the PGC 61A, only the cell 20 having ID numbers 1, 2, and 4 is reproduced, and when reproducing information from the DVD 1 based on the PGC 61B, Only the cell 20 having the ID numbers 1, 3 and 4 is reproduced. In this case, if the cell 20 is recorded separately for each ID number, for example, in the case of the PGC 61A, the recording position on the DVD 1 of the cell 20 with the ID number 2 is recorded on the DVD 1 of the cell 20 with the ID number 4. It takes time to jump the pickup for playback to the recording position of, and depending on the capacity of the track buffer in the playback apparatus described later, the cell 20 with ID number 2 and the cell 20 with ID number 4 may be played back continuously. (Hereinafter referred to as seamless playback) cannot be performed.

  Therefore, in the case shown in FIG. 3, the input signal of the cell 20 with ID number 2 and the cell 20 with ID number 3 is temporarily stopped according to the input / output processing speed in the track buffer. The interleaved unit IU having a length that does not impair the continuity of the output signal (that is, even if the input signal to the track buffer is interrupted due to the pickup jumping only during one interleaved unit IU) When the output signal from the PC is disassembled and recorded in an interleaved unit IU of a length that can be continuously output, and is reproduced based on the PGC 61A, for example, the cell 20 corresponding to the ID number 2 is configured. Only the interleaved unit IU is continuously detected and reproduced. Similarly, when reproducing based on the PGC 61B, only the interleaved unit IU constituting the cell 20 corresponding to the ID number 3 is continuously detected and reproduced. As described above, the length of the interleaved unit IU is determined in consideration of the capacity of the track buffer, and in addition to the performance of a drive mechanism such as a slider motor for performing track jumping. May be.

  As described above, by recording one cell 20 divided into a plurality of interleaved units IU according to the intention of the producer, the track can be reproduced even when the PGC 61 including the cell 20 with the skipped ID number is reproduced. The signal output from the buffer is not interrupted, so that the viewer can view the reproduced video without interruption.

  The interleaved unit IU is formed so as to be completed within one VOB 10, and the one interleaved unit IU does not straddle a plurality of adjacent VOBs 10. As for the relationship between the interleaved unit IU and the VOB unit 30, one or more VOB units 30 are included in one interleaved unit IU, and one VOB unit 30 is included in one interleaved unit IU. It is configured to be completed, and one VOB unit 30 is not divided and straddles a plurality of interleaved units IU.

  Next, among the various control information having the above-described physical structure and logical structure, a first reproduction prohibition flag and an example of the second reproduction prohibition information that constitute an example of the first reproduction prohibition information. The configuration related to the reproduction prohibition flag will be described in more detail.

  First, the first regeneration prohibition flag will be described with reference to FIG. 1, FIG. 4, and FIG.

  The PGCI (Program Chain Information) included in the control data 11 recorded at the head of the VTS 3 shown in FIG. 1 includes a cell reproduction information table 201 as shown in FIG. 4 which includes detailed information about a plurality of cells included in the PGCI. It consists of In the present embodiment, in order to display or output a “problem”, one cell is defined to include video and audio information for one “problem” (cell # 1). In order to display or output audio when the “answer” input by the viewer is correct, another cell is defined to include video and audio information corresponding to the correct answer (cell # 2). Furthermore, in order to display or output audio when this “answer” is incorrect, another cell is defined to include video and audio information corresponding to the error (cell # 3). . As described above, by defining the reproduction prohibition flag for each answer unit of the problem, it is possible to effectively prevent the situation where the answer is viewed without looking at the problem during the search or scan as described below.

  In FIG. 4, a cell playback information table 201 includes a playback prohibition flag 202 indicating whether or not each cell can be played back during special playback such as search or scan, and a cell indicating the playback time of each cell. The playback time information 203 includes cell start address information 204 indicating the start address of the first VOBU in each cell, and cell end address information 205 indicating the start address of the last VOBU in the cell. Among these, when the first regeneration prohibition flag 202 is “off” (that is, the flag is not set), by the regeneration control based on the first regeneration prohibition flag 202 by the system controller in the later-described reproducing apparatus, Regardless of special reproduction or normal reproduction, cell-by-cell reproduction in the cell corresponding to the first reproduction prohibition flag 202 is permitted. Also, when the first regeneration prohibition flag 202 is “ON” (that is, the flag is set), the system controller also controls the regeneration, and corresponds to the first regeneration prohibition flag 202 in the case of special regeneration. Cell-by-cell playback in a cell to be performed is prohibited. That is, when the viewer performs an operation such as time-designated playback, interlaced playback, or playback speed change (including speed change for forward fast forward and backward fast forward) by the playback control by the system controller, the first playback prohibition flag The reproduction of the cell including the VOBU corresponding to 202 is prohibited.

  In the example of FIG. 4, the cell reproduction information table includes cell start address information and cell end address information. However, the cell reproduction information table may include the size (number of bytes) of each cell instead of the cell end address information. . That is, even in this way, the end address of each cell can be specified.

  Therefore, in FIG. 4, for example, the cell of cell # 1 is a cell corresponding to question 1, the cell of cell # 2 is a cell corresponding to the correct answer to question 1, and the cell of cell # 3 is The cell corresponding to the error for the problem 1 is the cell corresponding to the problem 2, and the cell # 4 is a cell corresponding to the problem 2. As a result, the cells corresponding to the problem (cell # 1 and cell # 4) can be played back regardless of whether they are special playback or normal playback because the first playback prohibition flag 202 is “off”. On the other hand, the cells (cells # 2 and # 3) corresponding to the correct answer or the error (that is, the answer to the problem) are prohibited from being reproduced in the case of special reproduction such as search or scan, but are normally reproduced (that is, Replay when the corresponding problem has been replayed) is not prohibited.

  In FIG. 4, in the cell reproduction information table 201, the first reproduction prohibition flag 202 is logically configured as one row in a two-dimensional table.

  As a more specific configuration example of the first reproduction prohibition flag 202, for example, the first reproduction prohibition is performed as a part of 32-bit cell attribute information logically configured as one row in the cell reproduction information table 201. The flag is configured. That is, as shown in FIG. 5, the cell attribute information 210 is composed of 32 bits b0 to b31, and the bit b21 which is one bit is assigned to the first reproduction prohibition flag 202. Yes. Here, the first regeneration prohibition flag 202 is off when it is “0”, and is on when it is “1”.

  In FIG. 5, the cell block mode allocated to the two bits b31 and b30 indicates that the cell is not a cell in the block when “00”, and the first block in the block when “01”. “10” indicates that the cell is in the block, and “11” indicates that the cell is the last cell in the block. When the cell block type assigned to the two bits b29 and b28 is “00”, it indicates that it is not a part of the block, and when it is “01”, it indicates an angle block, “10” and “11” is a value for system expansion. For other bits b27 to b0, other detailed information indicating cell attributes is recorded in bit units, or is empty (a state in which “0” is arranged) as a system expansion area.

  Next, the second regeneration prohibition flag will be described with reference to FIG. 1, FIG. 6, and FIG.

  A DSI (Data Search Information) packet 51 included in the navigation pack 41 shown in FIG. 1 has contents specific to each VOBU 30 for performing search and seamless playback for the VOBU 30 headed by the navigation pack 41. It is navigation information, and is configured with a second reproduction prohibition flag.

  More specifically, for example, as shown in FIG. 6, the data structure of the DSI packet 51 is DSI general information, which is general information for performing a search for VOBU, and for performing a search during seamless playback. In addition to seamless playback information, seamless angle information for seamless angle playback, navigation pack address information, and synchronous playback information, 1-byte playback prohibition information 211 including a second playback prohibition flag is included. Yes. As shown in FIG. 7, the second reproduction prohibition flag 212 is composed of 1 bit b7 of 1 byte reproduction prohibition information 211 composed of 8 bits b0 to b7, and the other 7 bits b0 to b6 are extended. It is a use area (a state in which “0” is arranged). When the second regeneration prohibition flag 212 is “0” (that is, the flag is not set), no particular limitation is imposed on the regeneration control by the system controller in the later-described reproducing apparatus. When the second playback prohibition flag 212 is “1” (that is, the flag is set), the time-controlled playback, interlace playback, or change of the playback speed (forward fast forward) is also performed by the playback control by the system controller. And a speed change for backward fast forward) are performed, the reproduction of the cell including the VOBU corresponding to the second reproduction prohibition flag 212 is prohibited.

  As described above in detail, according to the present embodiment, a plurality of first playback prohibition flags that allow or prohibit special playback in units of cells are constructed in the cell playback information table provided in PGCI. Similarly, a second playback prohibition flag for prohibiting or permitting special playback in cell units is constructed in each DSI packet. Therefore, the playback device described later refers to the cell playback information table provided in the PGCI at the time of starting playback for each PGCI, so that the first playback before the video data in the PGCI is actually played back. Based on the prohibition flag, a cell for which playback is prohibited during special playback such as search or scan can be recognized in advance, so search or scan for a cell for which playback is prohibited is performed in advance (reproduce the cell). Before) can be surely blocked. Furthermore, even if the playback apparatus jumps into a playback-prohibited cell due to an instantaneous error or the like, or when there is an abnormality in the cell playback information table, the playback device is first at the head of that cell. When the DSI data included in the Navipack is read, based on the second playback prohibition flag, the playback of the cell whose playback is prohibited is more reliably prevented in real time (without delay after the DSI data is read). Can do. Such an operation according to the present embodiment will become more apparent from the description of the operation of the reproducing apparatus for reproducing the DVD according to the present embodiment, which will be described later.

  Note that the above DVD is relatively complicated and requires a large amount of information, for example, to display a plurality of displays according to the contents of the “answer” input by the viewer after displaying the “problem”. The above recording format is particularly effective when applied to the DVD 1 because it has a large storage capacity that can be recorded on an optical disc.

(II) Embodiment of Recording Apparatus Next, an embodiment of a recording apparatus for recording the control information, video information and audio information on the DVD 1 will be described with reference to FIG.

  First, the configuration and operation of the recording apparatus according to the embodiment will be described with reference to FIG.

  As shown in FIG. 8, the recording device S 1 according to the embodiment includes a VTR (Video Tape Recorder) 70, a memory 71, a signal processing unit 72, a hard disk (HD) device 73, and a hard disk (HD) device 74. And a controller 75, a multiplexer 76, a modulator 77, and a mastering device 78. In the present embodiment, an example of access information generating means is configured from the signal processing unit 72, and includes a hard disk device 73, a flexible disk (FD) device 74, a controller 75, a multiplexer 76, a modulator 77, and a mastering device 78. A recording unit is configured, and an example of an input unit is configured from the cue sheet ST and the memory 71, and an example of a multiplexing unit is configured from the multiplexer 76.

  Next, the operation will be described.

  In the VTR 70, recording information R which is a material such as music information and video information to be recorded on the DVD 1 is temporarily recorded. The recording information R temporarily recorded in the VTR 70 is output to the signal processing unit 72 in response to a request from the signal processing unit 72.

  The signal processing unit 72 performs A / D conversion on the recording information R output from the VTR 1, compresses the information by the MPEG2 method, time-multiplexes the music information and the video information, and outputs the compressed multiplexed signal Sr. Thereafter, the output compressed multiplexed signal Sr is temporarily stored in the hard disk device 73.

  In parallel with these, the memory 71 predivides the recording information R into partial recording information Pr, and turns on the first reproduction prohibition flag and the second reproduction prohibition flag for each partial recording information Pr, particularly for each cell. The content information regarding the partial recording information Pr input in advance based on the cue sheet ST in which “OFF” is described is temporarily stored, and is output as a content information signal Si based on a request from the signal processing unit 72.

  Based on the time code Tt corresponding to the recording information R output from the VTR 70 and the content information signal Si output from the memory 71, the signal processing unit 72 refers to the time code Tt to generate the partial recording information Pr. A corresponding access information signal Sac is generated and output, and the access information signal Sac is temporarily stored in the hard disk device 74.

  The above processing is executed for the entire recording information R.

  When the above processing is completed for all of the recording information R, the controller 75 reads the compressed multiplexed signal Sr from the hard disk device 73 and the access information signal Sac from the hard disk device 74, and generates the additional information DA based on these. Store in the hard disk device 74. This is because the contents of various control signals are determined by the generation result of the compressed multiplexed signal Sr. On the other hand, the controller 75 performs time management of operations of the signal processing unit 72, the hard disk device 73, and the hard disk device 74, reads the additional information DA from the hard disk device 74, and generates a corresponding additional information signal Sa. And outputs an information selection signal Scc for time-multiplexing the compressed multiplexed signal Sr and the additional information signal Sa.

  Thereafter, the compressed multiplexed signal Sr and the additional information signal Sa are time-axis multiplexed by the multiplexer 76 based on the information selection signal Scc and output as an information added compressed multiplexed signal Sap. If sub-picture information exists, it is input to the signal processing unit 72 by other means such as a hard disk device (not shown) and processed in the same way as image and audio information.

  Then, the modulator 77 applies an error correction code (ECC) such as a Reed-Solomon code and modulation such as 8-16 modulation to the output information-added compressed multiplexed signal Sap to generate a disk recording signal Sm. To the mastering device 78.

  Finally, the mastering device 78 records the disk recording signal Sm on a stamper disk that becomes a master (cutting die) when manufacturing the optical disk. Then, an optical disk as a replica disk that is generally marketed, that is, DVD 1 is manufactured by a replication device (not shown) using this stamper disk.

  Next, the detailed operation of the recording apparatus S1 for recording the first and second reproduction prohibition flags on the master disk will be described.

  First, the additional information signal is sent at a timing according to the access information signal Sac generated by the controller 75 based on the content information SI for designating on / off of each of the first and second reproduction prohibition flags input by the cue sheet ST. An information selection signal Scc indicating that Sa should be selected is output, and the multiplexer 76 is switched to the additional information signal Sa side. The first reproduction prohibition flag is input to the modulator 77 as a part of the additional information signal Sa constituting the cell reproduction information table in the PGCI, and further input to the mastering device 78 as a part of the disk recording signal Sm. The Subsequently, DSI data including the second reproduction prohibition flag constituting the navigation pack 41 of the first VOBU constituting the first VOB shown in FIG. 1 is similarly inputted to the modulator 77, and one of the disc recording signals Sm is inputted. Part. Next, the controller 75 outputs an information selection signal Scc indicating that the compressed multiplexed signal Sr should be selected, and the multiplexer 76 is switched to the compressed multiplexed signal Sr side, and this VOBU video pack, audio pack, sub-picture The pack is sequentially input to the modulator 77 as the information-added compressed signal Sap. This operation is repeated for a plurality of VOBUs and further repeated for a plurality of VTSs.

  As a result of the above, according to the present embodiment, a plurality of first playback prohibition flags for allowing or prohibiting special playback in units of cells are constructed in the cell playback information table provided in PGCI. It is possible to create a master disk in which a second playback prohibition flag for prohibiting or permitting special playback in units is constructed in each DSI data.

(III) Embodiment of Reproducing Apparatus Next, an embodiment of a reproducing apparatus for reproducing information recorded on the DVD 1 by the recording apparatus S1 will be described with reference to FIGS.

  First, the configuration and operation of the playback apparatus according to the embodiment will be described with reference to FIG.

  As shown in FIG. 9, the reproducing apparatus S2 according to the embodiment includes a pickup 80, a demodulation / correction unit 81, stream switches 82 and 84, a track buffer 83, and a system buffer 85 that constitute an example of a reading unit. Demultiplexer 86, VBV (Video Buffer Verifier) buffer 87, video decoder 88, sub-picture buffer 89, sub-picture decoder 90, mixer 91, audio buffer 92, audio decoder 93, and PCI buffer 94, a PCI decoder 95, a highlight buffer 96, a highlight decoder 97, an input unit 98, a display 99, a system controller 100, a drive controller 101, a spindle motor 102, and a slider motor 103. Has been. The configuration shown in FIG. 9 describes only the portion related to the reproduction of video and audio in the configuration of the playback device S2, and servos for servo control of the pickup 80, the spindle motor 102, the slider motor 103, and the like. Since the circuit and the like are the same as those of the prior art, the description and detailed description are omitted. In this embodiment, the slider motor 103 constitutes an example of a moving unit. Further, the demodulation / correction unit 81, the stream switches 82 and 84, the track buffer 83, the system buffer 85, the demultiplexer 86, the VBV (Video Buffer Verifier) buffer 87, the video decoder 88, and the sub-picture buffer 89 The sub picture decoder 90, the mixer 91, the audio buffer 92, the audio decoder 93, the PCI buffer 94, the PCI decoder 95, the highlight buffer 96, and the highlight decoder 97 constitute an example of a reproducing means. Has been. Further, an example of a specifying unit is configured from the input unit 98, and an example of a control unit is configured from the system controller 100.

  Next, the overall operation will be described.

  The pickup 80 includes a laser diode, a deflection beam splitter, an objective lens, a photodetector, and the like (not shown). The pickup 80 irradiates the DVD 1 with the light beam B as reproduction light, and reflects the reflected light from the DVD 1 on the light beam B. It receives light and outputs a detection signal Sp corresponding to the information pit formed on the DVD 1. At this time, the light beam B is accurately applied to the information track on the DVD 1 and is focused on the information recording surface on the DVD 1 with respect to an objective lens (not shown) in the same manner as in the prior art. Thus, tracking servo control and focus servo control are performed.

  The detection signal Sp output from the pickup 80 is input to the demodulation and correction unit 81, subjected to demodulation processing and error correction processing to generate a demodulation signal Sdm, and is output to the stream switch 82 and the system buffer 85.

  The stream switch 82 to which the demodulated signal Sdm is input is controlled to open and close by the switch signal Ssw1 from the drive controller 101. When the stream switch 82 is closed, the input demodulated signal Sdm is directly passed through and output to the track buffer 83. On the other hand, when the stream switch 82 is opened, the demodulated signal Sdm is not output, and unnecessary information (signal) is not input to the track buffer 83.

  The track buffer 83 to which the demodulated signal Sdm is input is configured by a FIFO (First In First Out) memory or the like, temporarily stores the input demodulated signal Sdm, and when the stream switch 84 is closed, The stored demodulated signal Sdm is continuously output. The track buffer 83 compensates for the difference in data amount for each GOP in the MPEG2 system, and is discontinuous due to the track jump in the seamless playback described above when reading the data divided into the interleaved units IU. The demodulated signal Sdm that is input to is continuously output, and the reproduction interruption due to the discontinuity is eliminated.

  The stream switch 84 to which the demodulated signal Sdm is continuously input is used in the system so that in the demultiplexing process in the demultiplexer 86, the various buffers in the subsequent stage do not overflow or conversely become empty and the decoding process is not interrupted. Opening and closing is controlled by a switch signal Ssw2 from the controller 100.

  On the other hand, the system buffer 85 to which the demodulated signal Sdm is input in parallel with the track buffer 83 is detected first when the DVD 1 is loaded, and the video manager and the control data of the VTS 3 regarding the entire information recorded on the DVD 1 ( 1) and is output to the system controller 100 as control information SC, and the DSI packet 51 for each Navipack 41 is temporarily stored as needed during information reproduction, and the control information is stored in the system controller 100. Output as SC.

  In the demultiplexer 86 to which the demodulated signal Sdm is continuously input via the stream switch 84, the video information, audio information, sub-video information, and the PCI packet 50 for each navigation pack 41 are separated from the demodulated signal SDM. The signal Sv, sub-picture signal Ssp, audio signal Sad, and PCI signal Spc are output to the VBV buffer 87, sub-picture buffer 89, audio buffer 92, and PCI buffer 94, respectively. Note that the demodulated signal Sdm may include a plurality of languages as separate streams as audio information or sub-picture information. In this case, the desired language is determined by the stream selection signal Slc from the system controller 100. Are selected and output to the audio buffer 92 or the sub-picture buffer 89, respectively.

  The VBV buffer 87 to which the video signal Sv is input is configured by a FIFO memory or the like, temporarily stores the video signal Sv, and outputs it to the video decoder 88. The VBV buffer 87 is used to compensate for variations in the data amount for each picture in the video signal Sv compressed by the MPEG2 system. Then, the video signal Sv in which the variation in the data amount is compensated is input to the video decoder 88, demodulated by the MPEG2 system, and output to the mixer 91 as a demodulated video signal Svd.

  On the other hand, the sub picture buffer 89 to which the sub video signal Ssp is input temporarily stores the input sub video signal Ssp and outputs it to the sub picture decoder 90. The sub picture buffer 89 is for outputting the sub video information included in the sub video signal Ssp in synchronization with the video information corresponding to the sub video information. Then, the sub video signal Ssp synchronized with the video information is input to the sub picture decoder 90, demodulated, and output to the mixer 91 as a demodulated sub video signal Sspd.

  When the sub-video signal Ssp includes video information for configuring a frame, a selection button, etc. necessary for configuring and displaying the menu screen, a highlight control signal from the system controller 100 is displayed. Based on Sch, the display state of the selection button to be displayed is changed and output.

  The demodulated video signal Svd output from the video decoder 88 and the demodulated sub-video signal Sspd output from the sub-picture decoder 90 (synchronized with the corresponding demodulated video signal Svd) are mixed by the mixer 91, The video signal Svp to be finally displayed is output to a display unit such as a CRT (Cathode Ray Tube) (not shown).

  Next, the audio buffer 92 to which the audio signal Sad is input is configured by a FIFO memory or the like, and temporarily stores the input audio signal Sad and outputs it to the audio decoder 93. The audio buffer 92 is for outputting the audio signal Sad in synchronization with the video signal Sv or the sub-video signal Ssp including the corresponding video information, and delays the audio signal Sad according to the output status of the corresponding video information. Let The audio signal Sad time-adjusted so as to be synchronized with the corresponding video information is output to the audio decoder 93, subjected to predetermined decoding, and output as a demodulated audio signal Sadd to a speaker (not shown) or the like. When it is detected that it is necessary to temporarily interrupt (pause) the playback immediately after access, the system controller 100 outputs a pause signal Sca to the audio decoder 93, and the audio decoder 93 The output of the demodulated audio signal Sadd is temporarily stopped.

  Further, the PCI buffer 94 to which the PCI signal Spc is input is configured by a FIFO memory or the like, and temporarily stores the input PCI signal Spc and outputs it to the PCI decoder 95. The PCI buffer 94 synchronizes the PCI packet 50 included in the PCI signal Spc with the video information, audio information, sub-video information, and the like corresponding to the PCI packet 50, and adds the PCI information to the video information, audio information, sub-video information, etc. This is for applying the packet 50. Then, the PCI signal Spc synchronized with the corresponding video information or sub-picture information by the PCI buffer 94 is separated from the highlight information included in the PCI packet 50 by the PCI decoder 95, and is sent to the highlight buffer 96 as the highlight signal Shi. In addition to being output, a portion other than the highlight information of the PCI packet 50 is output to the system controller 100 as a PCI information signal Spci.

  The highlight buffer 96 to which the highlight signal Shi is input is composed of a FIFO memory or the like, temporarily stores the input highlight signal Shi, and outputs it to the highlight decoder 97. The highlight buffer 96 is a time for accurately changing the display state of the selection item corresponding to the highlight information in response to the sub-video signal Ssp including the video information for the highlight information. This is a buffer for performing axis compensation. The highlight signal Shi subjected to time axis compensation is decoded by the highlight decoder 97, and information included in the highlight signal Shi is output to the system controller 100 as a demodulated highlight signal Shid. Here, the system controller 100 outputs the highlight control signal Sch in order to change the display state based on the highlight information based on the demodulated highlight signal Shid.

  The system controller 100 corresponds to the control information Sc input from the system buffer 85, the PCI information signal Spci input from the PCI decoder 95, and the input signal Sin input from the input unit 98 such as a remote controller. In order to perform the correct reproduction, the switch signal Ssw2, the language selection signal Slc, the pause signal Sca, and the highlight control signal Sch are output, and the display signal Sdp is displayed on the liquid crystal display device to display the operation status of the reproduction device S2. To the display 99.

  Further, when the system controller 100 detects that the track jump processing such as search is necessary for seamless playback by the control signal Sc or the like, the system controller 100 responds to the drive jump to the drive controller 101. The seamless control signal Scsl is output.

  The drive controller 101 to which the seamless control signal Scsl is input outputs a drive signal Sd to the spindle motor 102 or the slider motor 103. With this drive signal Sd, the spindle motor 102 or the slider motor 103 moves the pickup 2 so that the light beam B is irradiated to the recording position on the DVD 1 to be reproduced (see the broken line arrow in FIG. 9), and the rotation of the DVD 1 The number is controlled by CLV (constant linear velocity). In parallel with this, when the pickup 2 is moving and the demodulation signal Sdm is not output from the demodulation correction unit 81, the drive controller 101 outputs the switch signal Ssw1 based on the seamless control signal Scsl and opens the stream switch 82. At the same time, when the demodulated signal Sdm starts to be output, the stream switch 82 is closed and the demodulated signal Sdm is output to the track buffer 83.

  In the present embodiment, in particular, the system controller 100 is provided with an operation state register indicating the operation state of the playback device S2, and this operation state register is set to 1 when special playback such as search or scan is being executed. Has a specific bit. Therefore, only when the specific bit is set to 1, control for prohibiting special reproduction may be performed. Furthermore, the system controller 100 is configured to store a cell playback information table (see FIG. 4) described in PGCI in a storage device such as a built-in RAM prior to playback of each PGC. Therefore, it is possible to determine whether or not special reproduction is prohibited for each cell without reproducing that cell.

  Next, the search operation and the scan operation based on the first and second reproduction prohibition flags of the system controller 100 according to the present invention in the reproduction apparatus S2 will be described.

  First, the search operation will be described with reference to FIG.

  In FIG. 10, prior to the search operation, when starting playback of each VTS, the system controller 100 reads in advance the cell playback information table as shown in FIG. 4 included in the PGCI data included in the control data, and internally Stored in a storage device such as a RAM.

  In this state, when a search such as chapter search or time search is instructed to the playback apparatus S2 by the viewer via the input unit 98, the special playback of the operation status register of the system controller 100 is being executed. Is set to 1. Then, the system controller 100 extracts the first reproduction prohibition flag for the cell corresponding to the designated search destination chapter, time, and the like from the cell reproduction information table (step S11). Next, the system controller 100 determines whether the extracted first regeneration prohibition flag is “1 (on)” or “0 (off)” (step S12). Here, if the first reproduction prohibition flag is “0”, the reproduction of the search operation and the scan operation of the cell is permitted, so the process proceeds to step S13, and the target address is searched under the control of the system controller 100. Then, reproduction of video information and audio information is started from the cell corresponding to the searched chapter, time, etc. (step S14). On the other hand, if the first reproduction prohibition flag is “1” in step S12, reproduction during the search operation and scan operation of the cell is prohibited, so that the process proceeds to step S15 and under the control of the system controller 100. For example, a message indicating that search is impossible is displayed on the display 99, such as “You cannot see the answer unless you answer the question!” (Step S15), and the instructed search operation is not executed (step S15). S16).

  As described above, according to the present embodiment, the pickup 80 is moved to the search target position by referring to the first reproduction prohibition flag constructed in the cell reproduction information table prior to the movement of the pickup 80. This is advantageous because the search can be stopped quickly and reliably. As a result, for example, in interactive playback, when looking for a “problem”, the “answer” is seen before the “problem” is viewed. Can be prevented in advance.

  Furthermore, according to the present embodiment, for each VOBU which is the smallest physically accessible unit, the second reproduction is performed in the DSI data of the navigation pack that is read prior to reproduction of the video and reproduction audio information. Since the prohibition flag is provided, the pickup 80 seems to have jumped into a cell that is different from the search target cell and whose playback is prohibited by the first playback prohibition flag due to an error operation of the playback device S2. Even in such a case, by referring to the second reproduction prohibition flag built in the DSI data in the navigation pack provided for each VOBU prior to reproduction of the video and audio information in the cell, It is possible to prohibit playback of the cell by mistake in real time (i.e., after the pickup 80 has moved to the cell). Cell playback is prohibited during the switch operation can be reliably prevented a situation to be reproduced.

  Next, the scanning operation will be described with reference to FIG.

  In FIG. 11, prior to the scanning operation, when starting playback of each VTS, the system controller 100 reads in advance a cell playback information table as shown in FIG. 4 included in the PGCI data included in the control data, and internally Stored in a storage device such as a RAM.

  In this state, when a viewer performs a scanning operation such as a forward fast-forward scan or a backward fast-forward scan to the playback device S2 via the input unit 98, a display operation is performed under the control of the system controller 100. A specific picture (for example, an I picture or the like) predetermined as a picture is output (step S21). At this time, in particular, a specific bit indicating that special reproduction of the operation state register is being executed, which the system controller 100 has, is set to 1.

  Next, a track jump corresponding to the scan direction is performed (step S22), and the current address is acquired in units of VOBU (step S23). That is, the navigation pack of the VOBU to be reproduced after the jump is read, and the head address of the VOBU is recognized by the system controller 100. Subsequently, since the specific bit indicating that special reproduction is being executed in the operation state register is set to 1, the system controller 100 performs the following operation. That is, the first reproduction prohibition flag of the cell including the current address is extracted from the cell reproduction information table read and stored in advance prior to reproduction (step S24). Next, the system controller 100 determines whether the extracted first regeneration prohibition flag is “1 (on)” or “0 (off)” (step S25). Here, if the first reproduction prohibition flag is “0”, the reproduction of the search operation and the scan operation of the cell is permitted, so that the process directly proceeds to step S27 to determine whether or not the end of the scan is instructed. (Step S27). In step S27, if the end of scanning is instructed, scanning is ended (step S28), and normal reproduction is performed from the cell. If it is determined in step S27 that scanning has not been instructed, that is, scanning is instructed again, the process returns to step S21.

  On the other hand, if the first reproduction prohibition flag is “1” in step S25, reproduction in the search operation and scan operation of the cell is prohibited, so that the process proceeds to step S26 and under the control of the system controller 100. Then, by performing a track jump to the head address of the cell whose first reproduction prohibition flag located next in the scanning direction is “0”, the leading end of the next cell is searched (step S26), and then step S27. Proceed to

  FIG. 12 shows how the operation in step S26 is performed.

  As shown in FIG. 12, even if the viewer starts scanning while the reproducible cell 301 is being reproduced, even if the pickup is moved to the non-reproducible cell 302 during the scanning operation, the reproducible cell 301 is not reproducible. A cell is quickly determined based on the cell reproduction information table, and the next reproducible cell 303 is automatically and immediately searched. As described above, according to the present embodiment, functions such as rapid forward fast-forward and backward fast-forward, which are the original purposes of scanning, are hardly harmed, and in particular, the patent application invented by the inventors of the present invention described above. Compared with the scan operation by the technique of No. 07-166025, it can be seen that the non-reproduced time does not last long and a much smoother and more natural scan operation is possible.

  As described above, according to the present embodiment, only the reproducible cell is referred to by referring to the first reproduction prohibition flag constructed in the cell reproduction information table every time the pickup 80 is moved by the scanning operation. This is advantageous because it can be scanned. This makes it possible for a producer to search for only “problems” safely and quickly in interactive playback, and to see “answers” before looking at “problems” by searching. On the other hand, it is possible to prevent reproduction that is unpleasant for the viewer and to perform a smooth scanning operation that is very comfortable for the viewer.

  Furthermore, according to the present embodiment, for each VOBU which is the smallest physically accessible unit, the second reproduction is performed in the DSI data of the navigation pack that is read prior to reproduction of the video and reproduction audio information. Since the prohibition flag is provided, the pickup 80 seems to have jumped into a cell that is different from the scan target cell and whose reproduction is prohibited by the first reproduction prohibition flag due to an error operation of the reproducing device S2. Even in such a case, by referring to the second reproduction prohibition flag built in the DSI data in the navigation pack provided for each VOBU prior to reproduction of the video and audio information in the cell, Since it is possible to prohibit the reproduction of the cell in real time, the cell for which reproduction is prohibited is reproduced during the scanning operation. It can be more reliably prevented.

  Furthermore, by providing two types of playback prohibition flags that prohibit playback in the same cell unit as described above, the VO second playback prohibition flag in DSI is turned off (permitted state), and the first playback prohibition in PGCI is performed. If only the flag is turned on (prohibited state) for one PGC and off (permitted state) for the other PGCs, the same cell can be searched and scanned when the above-mentioned “reuse of cells” is performed. This is convenient because it can be made reproducible or impossible. That is, for example, teachers and parents can play back PGCs that can quickly check only correct answers without looking at problems, while students and children can play back PGCs that cannot be answered unless problems are finished. Convenient.

  Finally, according to the present embodiment that operates as described above, interactive playback is performed in which a different display or the like is displayed according to the content of the “answer” input by the viewer after the “problem” is displayed. Will be described with reference to FIGS. 13 and 14. FIG.

  In this playback, when the “answer” is correct, as a video corresponding to the correct answer, for example, a video with an explanation added to the display “correct answer” is displayed, and “ A sound such as “ping pong”, a voice reading out the displayed sentence, and the like are output. On the other hand, if this “answer” is wrong, a video corresponding to the mistake will be displayed, for example, a video with an explanation added to the display “Incorrect. A sound such as “boo” of an electronic buzzer, a voice that reads out a displayed sentence, and the like are output.

  FIG. 13 shows the flow of playback processing in the case of normal playback. The cell corresponding to the correct answer 1 and the cell corresponding to the error 1 are prohibited from special reproduction such as search operation and scan operation by the first and second reproduction prohibition flags. After the reproduction, the cell corresponding to the correct answer 1 or the cell corresponding to the error 1 is reproduced according to the “answer” by the viewer.

  FIG. 14 shows the flow of the reproduction process when the scan operation or the scan operation is started while the problem 1 is being reproduced. The cell corresponding to correct answer 1 and the cell corresponding to error 1 are prohibited from special reproduction such as search operation and scan operation by the first and second reproduction prohibition flags. A cell corresponding to correct answer 1 in which 1 is not reproduced or a cell corresponding to error 1 is not reproduced. Therefore, in this case, for example, under the control of the system controller 100, the head portion of the next problem 2 is searched or scanned, or the search or scan is stopped.

  As can be seen from FIG. 13 and FIG. 14, according to the present embodiment, interactive reproduction intended by the producer and preferable for the viewer is performed.

1 DVD
2 Video Manager 3, 63 VTS
10 VOB
11 Control data 20 cells 30 VOB unit 41 Navipack 42 Video data 43 Audio data 44 Sub picture data 50 PCI data 51 DSI data 60 Program 61, 61A, 61B PGC
62 Title 70 VTR
71 Memory 72 Signal Processing Unit 73 Hard Disk Device 74 Hard Disk Device 75 Controller 76 Multiplexer 77 Modulator 78 Mastering Device 80 Pickup 81 Demodulation Correction Unit 82, 84 Stream Switch 83 Track Buffer 85 System Buffer 86 Demultiplexer 87 VBV Buffer 88 Video Decoder 89 Sub picture buffer 90 Sub picture decoder 92 Audio buffer 93 Audio decoder 94 PCI buffer 95 PCI decoder 96 Highlight buffer 97 Highlight decoder 98 Input section 99 Display 100 System controller 101 Drive controller 102 Spindle motor 103 Slider motor 201 Cell playback information table 202 First regeneration prohibition flag 21 2 Second playback prohibition flag S1 recording device S2 playback device DK optical disc ST cue sheet

Claims (5)

An information recording medium reproduced by an information reproducing device,
A plurality of first data groups each including video information;
A plurality of second data groups each including a plurality of said first data groups;
Each includes a plurality of third data group constituted by combining a plurality of said second data groups,
Management information for each second data group, including prohibition information indicating permission or prohibition of special reproduction by the information reproduction apparatus for each second data group, and time information for each second data group; ,
Additional information for each third data group for controlling reproduction for each third data group;
Is recorded,
The management information is recorded at different positions for each of the data groups, and the video information is reproduced based on the management information read by the information reproducing device ,
All of the plurality of management information of the plurality of second data groups constituting one of the third data groups are all included in the additional information of the one third data group,
All of the plurality of management information of the plurality of second data groups constituting the other third data group are all included in the additional information of the other third data group An information recording medium characterized by that . An information recording apparatus for recording recording information including the video information on the information recording medium according to claim 1,
Recording the management information in a different location for each data group ;
All of the plurality of management information of the plurality of second data groups constituting one of the third data groups is recorded in the additional information of the one of the third data groups,
Further, all of the plurality of management information of the plurality of second data groups constituting the other third data group is included in the additional information of the other third data group. information recording apparatus comprising: a recording means for recording. An information recording method for recording recorded information on the information recording medium according to claim 1,
Recording the management information in a different location for each data group ;
All of the plurality of management information of the plurality of second data groups constituting one of the third data groups is recorded in the additional information of the one of the third data groups,
Further, all of the plurality of management information of the plurality of second data groups constituting the other third data group is included in the additional information of the other third data group. An information recording method characterized by recording. An information reproducing apparatus for reproducing recorded information from the information recording medium according to claim 1,
Reading means for reading out the video information, the additional information, and the management information from the information recording medium;
And the additional information, the reproducing means and the management information, based on the, reproducing the video information,
Control means for controlling the reproduction means to prohibit the special reproduction of the target second data group when the prohibition information in the management information indicates prohibition of the special reproduction;
An information reproducing apparatus comprising: An information reproducing method for reproducing recorded information from the information recording medium according to claim 1,
A reading step of reading out the video information, the additional information, and the management information;
And the additional information, the regeneration step and the management information, based on the, reproducing the video information,
If the prohibition information in the management information that indicates the prohibition of the special reproduction, control the reproduction of the video information in the regeneration step so as to prohibit the special reproduction of the second data group of interest A control process,
A method for reproducing information, comprising:

Images