JP2005190658A - Recording medium and playback apparatus therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an information recording medium which enables an industrial-use recording medium from being played back by a consumer playback apparatus, and to provide a recording apparatus and a playback apparatus for the information recording medium. <P>SOLUTION: The information recording medium is configured so as to have: two or more recorded information pieces which are independent of each other; two or more individual restriction information pieces which correspond to the individual recorded information pieces and indicate whether or not the individual recorded information pieces restrict their playback apparatus; a apparatus-designating information designating the playback apparatus which can play back the two or more recorded information pieces; and total restriction information pieces indicating whether or not all of the information recorded pieces included in the information recording medium restrict the playback apparatus and whether or not a part of the information recorded pieces included in the information recording medium restricts the playback apparatus. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention belongs to the technical field of a recording medium such as a high-density optical disk capable of recording information such as images and sounds typified by a DVD at a high density, and a reproducing apparatus for reproducing information from the recording medium.

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

  In these LDs and the like, image 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, on a CD, only a desired piece of music is selected from a plurality of recorded songs. Or playback such as changing the playback order at random.

  There are two possible uses for reproducing the information recorded on these recording media: business use such as a theatrical movie and consumer use such as reproduction in a general household.

  However, if the standard of the disk structure or the like is the same for an optical disc such as a DVD for commercial use and consumer use, there is a problem that the commercial optical disc is reproduced by a consumer information reproducing apparatus.

  That is, for example, taking a movie as an example, a consumer optical disc on which the movie is recorded is generally sold after months or years have passed since the road show was screened. In this case, if the commercial optical disc on which the movie is recorded during the road show is illegally distributed to the market, it will cause a great deal of damage to the producer and the boxer of the movie.

  As a solution to such a problem, it is only necessary to use different disc structure standards for commercial use and consumer use. However, it is necessary to manufacture at least two types of optical discs and playback devices for one movie. Therefore, mass production becomes difficult, and it becomes difficult to reduce the price of the optical disc and the playback device.

  As another method, there may be a method in which the distribution structure in the market is different for commercial use and consumer use while keeping the same disk structure standards for commercial use and consumer use. It is actually difficult to eradicate commercial movie software outflows to the general market.

  As another method, there is a method of multiplexing a so-called copy guard signal on the recording signal of the optical disc. Even in this case, when a duplicate optical disc is produced by the replication method, it can be reproduced by a consumer reproduction device. End up.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an information recording medium capable of preventing a commercial recording medium from being played back by a consumer playback device without changing the standard of the disk structure and the like, and a playback device therefor Is to provide.

  In view of the above problems, the invention described in claim 1 is a recording medium comprising a recording information area for recording recording information and a management information recording area for recording management information of the recording information, wherein the management information Includes information indicating the type of recorded information to be handled.

  According to the information recording medium configured as described above, it is possible to prevent a commercial recording medium from being played back by a consumer playback device without changing the standard of the disk structure or the like.

  According to a third aspect of the present invention, there is provided a recording medium comprising a recording information area for recording recording information and a management information recording area for recording management information of the recording information, the management information being handled In a reproducing apparatus for a recording medium having information indicating the type of recorded information, a reading unit for reading the recorded information on the recording medium, an extracting unit for extracting information indicating the type of the recorded information, and the type of the recorded information Discriminating means for discriminating whether or not to reproduce the recording medium based on the indicated information.

  According to the playback device configured as described above, it is possible to prevent a commercial recording medium from being played back by a consumer playback device without changing the standard of the disk structure or the like.

  As described above, according to the first aspect of the present invention, it is possible to prevent a commercial recording medium from being played back by a consumer playback device without changing the standard of the disk structure or the like. Become.

  According to the third aspect of the present invention, it is possible to prevent a commercial recording medium from being played back by a consumer playback device without changing the standard of the disk structure or the like.

  Next, preferred embodiments of the present invention will be described. Note that the embodiment described below describes an embodiment in which the present invention is applied to the DVD.

[1] 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.

  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 of the embodiment has a lead-in area LI at its innermost periphery and a lead-out area LO at its outermost periphery, during which video information and audio information are stored. 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 wants to present to the viewer (same attributes such as audio, sub-picture stream number and specifications, and corresponding language). A set of two works). More specifically, for example, for a single movie, a plurality of movies in different languages are recorded as titles or the same movie. Even if it exists, 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, for example, a video recorded on the DVD 1 such as a menu indicating the name of each title, information for preventing illegal copying, or an access table for accessing each title. Information related to the entire information and audio information is recorded.

  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. .

  In the control data 11 recorded at the head of the VTS 3, PGCI (Program Chain Information), which is various information related to the program chain, is a logical division combining a plurality of cells (cells will be described later). The In each VOB 10, in addition to the control information, the actual part of video information and audio information (video or audio itself other than control information itself) is recorded. One VOB 10 is composed of 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 includes a navigation pack 41, a video pack 42 as video information, an audio pack 43 as audio information, and a sub-picture pack 44 as sub-video information. Here, as the video pack 42, only the packet including the image data and the pack header are recorded, and as the audio pack 43, only the packet including the audio data and the pack header are recorded. Further, as the sub-picture pack 44, only a packet including graphic data such as characters and graphics as a sub-picture and a pack header are recorded. 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.

  The playback time corresponding to one VOB unit 30 (playback time corresponding to data recorded between one navigation pack 41 and the navigation pack 41 adjacent to the one navigation pack 41) is 0. Recorded to have a length of 4 seconds or more.

  Further, the navigation pack 41 always exists at the top in one VOBU, but the video pack 42, the audio pack 43, and the sub-picture pack 44 do not necessarily exist, and even if they exist, the number and order thereof are arbitrary. is there.

  Lastly, the navigation pack 41 uses DSI (Data, which is search information for searching for video and audio to be displayed (specifically, an address on the DVD 1 in which the video and audio to be displayed are recorded)). Search Information) packet 51 and PCI (Presentation Control Information) packet 50 which is information related to display control when displaying video, audio, etc. searched based on DSI packet 51, and further, in one VOBU All of the included video data is composed of one or more GOPs (Group Of Picture) 52. It should be noted that the PCI data 50 includes highlight information that defines the display and operation when the item is selected for the selection item selected by the viewer. Depending on the highlight information, for example, in an image (so-called menu screen) displaying an item to be selected by the viewer, a screen display change with respect to the selected item, a display position to be changed, and a command corresponding to the selected item (selected The instruction to be executed corresponding to the selected item) is set. Here, image 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 that is the above-described sub-picture information.

  Further, the GOP 52 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 image 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 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 for each of these sections based on the logical structure described later, 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 combines the data (particularly cell 20) shown in FIG. 1 with the logical structure shown in FIG. Information for reproduction (access information, time information, etc.) is recorded on the DVD 1, particularly in the control data 11.

  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 can be freely selected and viewed by the viewer, and this unit is referred to as a 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, by combining a plurality of programs 60, one PGC (Program Chain) 61 is logically configured 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 the respective programs 60 are played back. A program number is assigned.), A reproduction order of the cells 20 (a unique cell number is assigned to each cell 20 by this reproduction order), an address that is a recording position on the DVD 1 of each cell 20, one program 60, the number of the first cell 20 to be reproduced, the reproduction method of each program 60, and various commands (commands that can be specified by the producer for each PGC 61 or cell 20) are included. Note that the recording position of the PGCI on the DVD 1 is in the control data 11 as described above, or in the control data (not shown) of the video manager 2 if it is PGCI related to the menu in the video manager 2. .

  In addition to the PGCI, one PGC 61 includes data such as substantial images and sounds as a combination of the programs 60 (in other words, as a combination of the 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). In addition to the method of reproducing the cells 20 in the order stored in the DVD 1 (reproduction of continuously arranged cells), the cells 20 to be used are reproduced regardless of the order stored in the DVD 1 (for example, later The producer can select a method (reproduction of non-contiguously arranged cells), for example, reproducing the recorded cell 20 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 specifies the information divided in the physical structure, thereby forming a video (movie or the like) that the viewer should see.

  Since it is necessary to record information of various levels as described above, the information having the above-described recording format is not limited to recording one movie as in the DVD 1, As for subtitles and the like, it is particularly suitable for an information recording medium having a large storage capacity capable of recording audio and subtitles of a plurality of languages on the same optical disc.

  Next, among the image information and audio information having the physical structure and the logical structure described above, the title set information, the playback device designation ID, and the playback device limitation information according to the present invention will be described in detail. The above information can be recorded in the following two recording modes.

(1) First Recording Mode The present invention is characterized in that title set information Its is recorded in the video manager 2. FIG. 3 shows a recording example according to the first recording mode. The title set information Its is information relating to whether or not the playback device that plays back the VTS 3 recorded on the DVD 1 is limited to a specific playback device. Specifically, as shown in FIG. 3, when the title set information Its is “00”, all the VTSs 3 recorded on the DVD 1 do not limit the playback device, that is, what playback device is used. Means that all VTSs 3 can be reproduced. When the title set information Its is “11”, all the VTSs 3 recorded on the DVD 1 limit the playback device, that is, any VTS 3 cannot be played back unless a specific playback device is used. Means that. Further, when the title set information Its is “10”, the VTS 3 recorded on the DVD 1 includes those that limit the playback device and those that do not limit the playback device. This means that playback cannot be performed without using any other playback device, and VTS 3 can be played back using any other playback device. The VTS 3 that limits the playback device corresponds to the above-mentioned record information for business use, and the VTS 3 that does not limit the playback device corresponds to record information that can be shared for consumer use, business use, or consumer use.

  Further, the video manager 2 further includes playback device designation information Id corresponding to each VTS 3 defined to limit the playback device by the title set information Its. The playback device designation information Id is information for identifying a playback device that is permitted to play back the VTS 3, that is, for business use or consumer use, or what kind of information is used for business use. Information indicating the type of playback device, such as whether the playback device is handled, is described in a text format. Specifically, each playback device is assigned a playback device code for each type, and the playback device code is stored in a built-in memory or the like. The playback device designation information Id designates a playback device code of a playback device that is permitted to play the DVD 1. According to the above-described title set information Its, it can be determined whether or not the VTS 3 on the DVD 1 limits the playback device. However, what kind of playback device is actually limited is based only on the title set information. I can't know. Therefore, when the title set information Its stipulates that the playback device is limited (“11” and “10”), the playback device designation Id indicates information indicating which playback device is limited. .

  Therefore, by referring to the title set information Its and the playback device designation ID, whether or not the VTS 3 on the DVD 1 can be played back by all playback devices, or cannot be played back without using a specific playback device, and If it is limited to a specific playback device, it can know which playback device it is.

  Further, in the present invention, as shown in FIG. 3, the playback device limitation information Idl is included in the control data 11 in the VTS 3. The playback device limitation information Idl is information indicating whether or not the VTS 3 to which the control data 11 belongs limits the playback device. The above-mentioned title set information Its can be reproduced by any reproduction device, or only by a limited reproduction device, or by a reproduction device that can reproduce the plurality of VTSs 3 included in the DVD 1. This is information indicating whether to include both limited VTS3 and non-limited VTS3. On the other hand, the reproduction device limitation information Idl here is information indicating whether or not the reproduction device is limited only for one VTS 3 to which the control data 11 belongs, not for all the VTSs 3 in the DVD 1. Specifically, as shown in FIG. 3, when the playback device limit signal is “00”, this means that the VTS 3 does not limit the playback device, that is, it can be played back using any playback device. On the other hand, when the playback device limit signal is “11”, this means that the VTS 3 limits the playback device, that is, it cannot be played back without using a specific playback device. When the playback device limit signal is “11”, it is possible to know which playback device can play back the VTS 3 by referring to the playback device designation Id described above.

  As described above, in the present invention, information relating to the limitation of the reproducing apparatus for all the recording information included in the DVD is recorded in the video manager 2 which is an area accessed first of the DVD. Therefore, when all the recorded information (that is, VTS) in the DVD is unified for business use or consumer use, it is possible to know whether or not there is a limitation on the playback apparatus without having to access each VTS individually. The playback can be started quickly, or the user can be notified that playback is impossible. For the user, after accessing all VTSs over time, it is not convenient to use that the VTS is incapable of reproducing any VTS after all. In this regard, in the present invention, when the limitation of the reproducing apparatus for all recorded information is uniformly determined, it is possible to know whether or not the reproduction can be performed immediately after the insertion of the disc, so that the usability for the user can be improved. Also, even if it is not uniformly determined, it is possible to know whether or not the VTS limits the playback device by accessing each VTS, so that a business VTS and a consumer VTS are stored in one disk. Can be mixed.

(2) Second Recording Mode In the first recording mode, whether or not the playback device is limited for each VTS 3 is included in the control data 11 in each VTS 3 as playback device limitation information Idl. Instead of this, there is also a method of collectively including in the video manager 2 information on whether or not to limit the playback device for each VTS 3. FIG. 4 shows a recording example of the reproduction apparatus limited information Idl in this case. As shown in FIG. 4, related information IR about each VTS 3 is recorded in the video manager 2, and the playback device limitation information Idl of each VTS 3 is included in a part thereof. The meaning of the individual playback device limitation information Idl is the same as in the case of the first recording mode. When the playback device limitation signal is “00”, the VTS 3 does not limit the playback device, and the playback device limitation signal is “11”. ", The VTS 3 limits the playback device. In addition, when the playback device limitation information Idl is “11”, which playback device is specifically limited is determined by the playback device designation Id in the video manager 2.

  As described above, if the reproduction device limitation information for each VTS 3 is collectively recorded in the video manager 2, even when a VTS with a limitation of a reproduction device and a VTS without limitation are mixed, the user can Whether or not the playback device of the selected VTS is limited can be known without searching the VTS, and whether or not playback can be performed can be quickly notified to the user. This point will be described more specifically in the item of operation of the playback device later.

[2] Embodiment of Recording Apparatus Next, an embodiment of a recording apparatus for recording the control information including the above-described title set 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 of this embodiment will be described.

  As shown in FIG. 5, the recording apparatus S1 according to the present embodiment includes a VTR (Video Tape Recorder) 70, a memory 71, a signal processing unit 72, hard disk devices 73 and 74, a controller 75, and a multiplexer 76. And a modulator 77 and a mastering device 78.

  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 based on the cue sheet ST in which control information and the like regarding each partial recording information Pr is described, Content information relating to the recording information Pr is temporarily stored and 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 corresponds to the partial recording information Pr with reference to the time code Tt. An 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. The contents of the title set information, the playback device designation information, and the playback device limited information in this embodiment are determined in advance by the producer of the DVD 1 and stored in the hard disk 74. Then, under the control of the signal processing unit 72, information corresponding to the video manager 2 and the controller 11 is included in the additional information DA. That is, in the first recording mode, the title set information and the playback device designation information are recorded as information recorded as the video manager 2, and the playback device limited information is recorded as the control data 11 in each VTS 3. It is included in the additional information DA. On the other hand, in the second recording mode, the title set information, the playback device designation information, and the playback device restriction information are all included in the additional information DA as information recorded as the video manager 2.

  On the other hand, the controller 75 performs time management of the operations of the signal processing unit 72, the hard disk device 73, and the hard disk device 74, and reads and outputs the additional information signal Sa corresponding to the additional information DA from the hard disk device 74. An information selection signal Sc for time-multiplexing the compression multiplexed signal Sr and the additional information signal Sa is generated and output.

  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 Sc and output as an information added compressed multiplexed signal Sap. At the stage of this information-added compressed multiplexed signal Sap, the information to be recorded is synthesized with the control signal, the video information and the audio information by the switching operation using the information selection signal Sc of the controller 75, and the physical structure (physical structure shown in FIG. Format). If sub-video information exists, it is input to the decoding processing unit 72 by other means such as an FD device (not shown) and processed in the same manner as video and audio information.

  Thereafter, 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 disc recording signal Sm, Output 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 disc as a commercially available replica disc is manufactured by a replication device (not shown) using this stamper disc.

  As described above, a DVD is created in which title set information, playback device specifying information, and playback device limited signals are recorded according to the first or second recording mode.

[3] 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 overall configuration and operation of the playback apparatus according to the embodiment will be described with reference to FIG.

  As shown in FIG. 6, the playback device S2 according to this embodiment includes a pickup 80, a demodulation / correction unit 81, stream switches 82 and 84, a track buffer 83, a system buffer 85, a demultiplexer 86, and a VBV. (Video Buffer Verifier) buffer 87, video decoder 88, sub-picture buffer 89, sub-picture decoder 90, audio buffer 92, audio decoder 93, PCI buffer 94, PCI decoder 95, and 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. The configuration shown in FIG. 6 describes only the portion related to the reproduction of the image and sound in the configuration of the playback device S2, and the servo for servo-controlling 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.

  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 be opened and closed 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 a difference in data amount for each GOP in the MPEG2 system, and is a demodulated signal that is discontinuously input due to a track jump at the time of reading data divided into the interleaved unit IU. This is to output Sdm continuously and to cancel the interruption of reproduction due to the discontinuity. The processing related to the above-described title information is mainly performed by the system buffer 85, the system controller 100, etc., details of which will be described later.

  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 management information (video manager 2) and VTS 3 regarding the entire information recorded on the DVD 1 Control data 11 is output to the system controller 100 as control information Sc, and DSI data for each navigation pack 41 is temporarily stored as needed during information reproduction, and the control information Sc is stored in the system controller 100. Output as.

  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 PCI data for each navigation pack 41 are separated from the demodulated signal Sdm, and the video signal Sv, sub-picture signal Ssp, audio signal Sad, and PCI signal Spc are output to 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 for compensating 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 image 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 image 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 final image signal Svp to be displayed is output to a display unit such as a CRT (Cathod 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 is for synchronizing the PCI data included in the PCI signal Spc with the video information, sub-video information, etc. corresponding to the PCI data, and applying the PCI data to the video information, sub-video information, etc. is there. 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 data by the PCI decoder 95 and output to the highlight buffer 96 as the highlight signal Shi. At the same time, the part other than the highlight information of the PCI data is output to the system controller 100 as the 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-picture signal Ssp including the image 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 correct reproduction, the switch signal Ssw2, the stream 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 in order to display the operation status of the reproduction device S2. To the display 99.

  Further, when the system controller 100 detects from the control information Sc or the like that a track jump process such as search is necessary for seamless playback, the system controller 100 responds to the track jump process 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. In response to this drive signal Sd, the spindle motor 102 or the slider motor 103 moves the pickup 2 so that the light beam B is applied to the recording position on the DVD 1 to be reproduced, and controls the rotation speed of the DVD 1 by CLV (FIG. 6). (See dashed arrow). In parallel with this, the drive controller 101 outputs the switch signal Ssw1 based on the seamless control signal Scsl and opens the stream switch 82 when the pickup 2 is moving and the demodulated signal Sdm is not output from the demodulation correction unit 3. 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.

  Next, the operation of the system controller 100 according to the present invention in the reproducing apparatus S2 will be described with reference to the flowchart shown in FIG.

(1) First Playback Method First, the first playback method will be described. This first reproduction method is a reproduction method in the case where title set information or the like is recorded according to the first recording mode shown in FIG. FIG. 7 is an operation flowchart of the first reproduction method.

  First, when the user sets the DVD 1 in the playback device S2, the system controller 100 performs initial settings including settings of servo systems such as tracking servo and focus servo (step S1), and then accesses the video manager 2. Necessary information including the title set information and the playback device designation information shown in FIG. 3 is acquired (step S2). Subsequently, the system controller 100 determines whether the acquired title set information is “00”, “10”, or “11” (step S3).

  When the title set information is “00”, all the VTSs 3 included in the DVD 1 can be played back on any playback device without limiting the playback device, so that a normal playback operation is performed. Specifically, one or more titles included in the DVD 1 are displayed as a menu on the CRT (step S4). When the user selects one title to be reproduced (step S5), the system controller 100 searches for the VTS 3 including the selected title and jumps the pickup to the position of the VTS 3 on the DVD 1 (step S6). Next, the control data 11 in the VTS 3 is read (step S7). Then, the system controller 100 acquires PGCI included in the control data 11 (step S8), and reproduces the VTS 3 according to the content (step S9).

  On the other hand, if it is determined in step S3 that the title set information is “11”, the playback devices that can play back all the VTSs 3 of the DVD 1 are limited. Therefore, the system controller 100 determines whether or not the playback device in which the DVD 1 is set corresponds to the playback device specified by the playback device designation information acquired in step S2 (step S10). If applicable (step S10: Yes), the process jumps to step S4 to perform normal reproduction (steps S4 to S9). On the other hand, when the current playback device does not correspond to the playback device specified by the playback device specification information (step S10: No), the system controller 100 determines that all titles recorded on the DVD 1 are all recorded on the playback device. The fact that playback is impossible is displayed on the CRT (step S11), and the process is terminated (step S12).

  If it is determined in step S3 that the title set information is “10”, it means that the DVD 1 includes a mixture of VTS 3 that limits the playback device and VTS 3 that does not limit the playback device. Therefore, the reproduction is performed after individually checking whether or not the title desired by the user can be reproduced by the reproduction apparatus. Specifically, first, the title included in the DVD 1 is displayed on the CRT (step S13), and the user is allowed to select one of the titles (step S14). Next, the VTS 3 including the selected title is searched, the pickup is jumped to the recording position on the DVD 1 (step S15), and the control data 11 included in the VTS 3 is read (step S17). Since the control data 11 includes playback device limitation information as shown in FIG. 3, the system controller 100 refers to this and detects whether or not the VTS 3 limits the playback device (step S17). ). When the VTS 3 does not limit the playback device, that is, when the playback device limitation information is “00”, the title can be played back by the current playback device. Therefore, the process jumps to step S8, acquires PGCI from the control data 11 in the VTS 3, and starts reproduction (step S9).

  On the other hand, if the VTS 3 limits the playback device, that is, if the playback device limitation information is “11” in step S17, the system controller 100 has specified the current playback device by the playback device designation information. It is determined whether it is included in the playback device (step S18). If it is included in the designated playback device (step S18: Yes), the process jumps to step S8 to acquire PCGI and start playback (steps S19 and S20). On the other hand, if it is not included in the designated playback device in step S18 (step S18: No), the system controller 100 indicates that the title cannot be played back depending on the playback device currently used. Displayed above (step S19), the process is terminated (step S20).

  As described above, according to the first playback method, when a DVD is set in the playback device, the system controller 100 first refers to the title set information in the video manager 2 to refer to all titles in the DVD 1. Determines whether the playback device is limited. If there is no limitation on the playback device, playback is started immediately. If all titles in the DVD are limited, it is determined whether or not the playback device is included in the designated playback device, and if it is the designated playback device, playback is started. If there is a limitation on the playback device for only a part of the VTSs 3 in the DVD 1, the playback device limitation information of the VTS 3 selected by the user is checked to determine whether playback is possible. As described above, in the present invention, the title manager information indicating whether or not the playback device is limited is included in the video manager that is read first when the DVD is set. Therefore, the limitation of the playback device is determined uniformly. In the case of a DVD, it is not necessary to search for each VTS and check whether there is a limitation for each VTS, so that it is possible to start playback quickly or display that playback is impossible. . Even for a DVD in which VTSs that limit playback devices and VTSs that do not limit playback are mixed, playback can be performed only when playback is possible by properly determining whether playback is possible.

[2] Second Playback Method Next, the second playback method will be described. The second reproduction method relates to a reproduction method of a DVD created according to the second recording mode shown in FIG. FIG. 8 shows an operation flowchart of the second reproduction method.

  This second playback method is different from the first playback method only in the processing in the case where VTSs that limit playback devices and VTSs that do not limit playback are mixed in the set DVD. That is, in FIG. 8, the process from setting the DVD to checking the title set information (steps S21 to S23), the process when the title set information is “00” (steps S24 to S29), and The processing when the title set information is “11” (steps S30 to S32) is the processing in the first reproduction method shown in FIG. 7 (steps S1 to S3, steps S4 to S9, and steps S10 to S12). The detailed description thereof will be omitted. However, in the recording mode shown in FIG. 4, since the playback device limitation information for each VTS 3 is recorded together in the video manager 2, the system controller 100 not only records the title set information and playback device designation information in step S22. Therefore, the reproduction device limitation information for each VTS 3 is also acquired.

  If it is determined in step S23 that the title set information is “10”, it means that the DVD 1 includes a mixture of VTS 3 that limits the playback device and VTS 3 that does not limit the playback device. Therefore, the titles included in the DVD 1 are displayed on the CRT (step S33), and the user is allowed to select one of the titles (step S34). Next, of the playback device limitation information stored in the video manager 2, the playback device limitation information corresponding to the VTS 3 including the selected title is acquired (step S35), and whether the VTS 3 limits the playback device. Whether or not is detected (step S36). Here, unlike the case of the first playback method, the playback device limitation information is not recorded in the control data 11 in each VTS 3, but is recorded in the video manager 2 (see FIG. 4). There is no need to search the VTS 3 and read the control data 11 contained therein. When the VTS 3 does not limit the playback device, that is, when the playback device limitation information is “00”, the title can be played back by the current playback device. Therefore, the process jumps to step S28, PGCI is acquired from the control data 11 in the VTS 3, and reproduction is started (step S29).

  On the other hand, if the VTS 3 limits the playback device, that is, if the playback device limitation information is “11” in step S36, the system controller 100 has specified the current playback device by the playback device designation information. It is determined with reference to the playback device designation information Id whether or not it is included in the playback device (step S37). If it is included in the designated playback device (step S37: Yes), the process jumps to step S28 to acquire PCGI and start playback (steps S28 and S29). On the other hand, if it is not included in the designated playback device in step S37 (step S37: No), the system controller 100 indicates that the title cannot be played back depending on the playback device currently used. Displayed above (step S38), the process is terminated (step S39).

  As described above, according to the second recording mode, the playback device limitation information corresponding to each VTS is recorded together in the video manager 2. Therefore, according to the second playback method, when the inserted DVD includes a title that limits the playback device and a title that does not limit the playback device, even if one title is selected by the user, the VTS 3 corresponding to the title is searched. Thus, it is possible to immediately know whether or not the reproduction is possible without going to read the control data 11, and a quick response to the user's operation becomes possible.

It is a figure which shows the recording format of DVD which concerns on embodiment of this invention. It is a figure which shows the logical format of DVD which concerns on embodiment of this invention. It is a figure which shows 1st recording modes, such as title set information. It is a figure which shows 2nd recording modes, such as title set information. 1 is a block diagram illustrating a configuration of a DVD recording apparatus according to an embodiment of the present invention. It is a block diagram which shows the structure of the reproducing | regenerating apparatus of DVD which concerns on embodiment of this invention. It is an operation | movement flowchart of the 1st reproducing | regenerating method which concerns on embodiment of this invention. It is an operation | movement flowchart of the 2nd reproducing | regenerating method which concerns on embodiment of this invention.

Explanation of symbols

1 ... DVD
2 ... Video Manager 3, 63 ... VTS
10 ... VOB
DESCRIPTION OF SYMBOLS 11 ... Control data 20 ... Cell 30 ... VOB unit 41 ... Navi pack 42 ... Video data 43 ... Audio data 44 ... Sub picture data 60 ... Program 61, 61A, 61B ... PGC
62 ... Title 70 ... VTR
71 ... Memory 72 ... Signal processing unit 73 ... Hard disk device 74 ... FD 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 unit 99 ... Display 100 ... System controller 101 ... Drive controller 102 ... Spindle motor 103 ... Slider motor S1 ... Recording device S2 ... Reproducing device DK ... optical disc ST ... cue sheet

Claims (4)

  A recording medium having a recording information area for recording recording information and a management information recording area for recording management information of the recording information, the management information including information indicating a type of recording information to be handled A recording medium characterized by the above.   2. The recording medium according to claim 1, wherein the type of the recording information is one for consumer use or business use. A recording medium comprising a recording information area for recording recording information and a management information recording area for recording management information of the recording information, wherein the management information indicates a type of recording information handled in a device that drives the recording medium In a reproducing apparatus for a recording medium having information
Reading means for reading the recording information of the recording medium;
Extracting means for extracting information indicating the type of the recorded information;
Discrimination means for discriminating whether or not to reproduce the recording medium based on the information indicating the type of the recording information;
A playback apparatus comprising:   4. The reproducing apparatus according to claim 3, wherein when the recording medium is set in the reproducing apparatus, the discriminating unit first refers to the entire limited information piece.

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