JP4197708B2 - Information reproducing apparatus and information reproducing method - Google Patents

Description

  The present invention relates to an information recording medium such as a high-density optical disc capable of recording information such as video and audio represented by a DVD at high density, a recording apparatus for recording information on the information recording medium, and the information recording The present invention belongs to a technical field of a reproducing apparatus for reproducing information from a medium.

  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, when watching a foreign movie recorded on LD, select the language used in the subtitles displayed on the screen (for example, select Japanese subtitles and original subtitles) ) When displaying or listening to music recorded on a CD, the sound of the music may be selected (for example, selecting whether to listen in English or Japanese lyrics) It is not possible.

  On the other hand, there are many proposals and developments on DVD, which is an optical disk whose storage capacity is improved by about 10 times without changing the size of the optical disk itself, compared with the conventional CD. Recording layers that have choices and that can be played by so-called interactive changes, such as the viewer selecting and viewing them, have not yet been proposed or developed for playback devices. The present situation is that the problem that the viewer has choice and interactive reproduction is not recognized by those skilled in the art.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a recording device for recording information such that video and audio displayed in addition to the main video can be appropriately selected during reproduction, and an information recording medium on which information is recorded by the recording device. And a reproducing apparatus capable of selecting the recorded information and performing a variety of reproductions.

In order to solve the above problems, the invention according to claim 1 is directed to compulsory output for forcibly displaying video information, audio information, and sub-video information in a multiplexed manner and displaying the sub-image information. An image command, a display start command for starting display of the sub-image information, and a display end command for stopping the display. An information reproducing apparatus, sub-image control means for performing display control of the sub-image information based on the forced image output command, the display start command and the display end command, and the sub-image information to be displayed Storage means for storing type specifying information for specifying the type of the image, and the sub-image control means stores the stored information when detecting the forced image output command. Configured demarcating out the sub picture information corresponding to that type specifying information.

In order to solve the above problems, the invention according to claim 4 is directed to compulsory output for forcibly displaying video information, audio information, and sub-video information in a multiplexed manner and displaying the sub-image information. An image command, a display start command for starting display of the sub-image information, and a display end command for stopping the display. An information reproduction method executed in an information reproduction apparatus, wherein the information reproduction apparatus includes storage means for storing type specifying information for specifying a type of the sub-image information to be displayed, and the forced image output A sub-image control step for controlling display of the sub-image information based on a command and the display start command and the display end command, wherein the forced image output frame Upon detection of a de configured to include the sub image control step of fractionating out the sub picture information corresponding to the type identification information that is the storage.

  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.

(I) Embodiment of Information Recording Medium First, the physical and logical configuration of recorded information recorded on a DVD, which is an embodiment of an information recording medium reproduced by a reproducing apparatus described later according to the present application The operation will be described with reference to FIGS.

  First, a recording format (physical recording format) of video information and audio information on a DVD will be described with reference to FIG. Note that the video information of this embodiment includes main video information that is mainly video to be displayed and sub-video information that is sub-video to be superimposed (inserted) on the main video as needed. Shall.

  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) is a related title (same number of audio information or sub-picture information, attributes, attributes such as supported language, etc.) (such as a movie) that the producer wants to present to the viewer A set (collection) of a single work). More specifically, for example, multiple movies in different languages are recorded as titles for the same movie, or the same movie. Even so, the theater version and the special version are recorded 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.

  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 PGCI (Program Chain Information) which is various information related to a program chain including a plurality of programs which are logical divisions combining a plurality of cells (cells will be described later). ) Etc. are 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 includes a navigation pack 41, video data 42 as video information, audio data 43 as audio information, and sub-picture data 44 as sub-video information. Here, only video data is recorded as the video data 42, and only audio data is recorded as the audio data 43. Further, as the sub-picture data 44, only graphic data such as characters and figures as a sub-picture is recorded. These video data 42, audio data 43, and sub-picture data 44 are not recorded all together, but are each divided into a plurality of pieces and recorded in the VOB unit 30 as shown in FIG. .

  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. Furthermore, on the DVD 1, audio and sub-videos of different types of languages are recorded by forming streams having stream numbers as separate stream identification information for each type of audio or sub-video and for each language. The

  The portion corresponding to the sub-picture data 44 includes a compulsory image output command indicating the timing for forcibly displaying the sub-picture data 44 on the display screen when the DVD 1 is reproduced. (A type of command described later) is described.

  To explain this forced image output command, for example, when a Japanese movie (the line is in Japanese) is played and a German appears in it and speaks the line in German, In some cases, speech cannot understand the German dialogue. At this time, the Japanese corresponding to the German dialogue is recorded as the sub-picture data 44 together with the forced output command, and the corresponding Japanese dialogue is forced to the screen as a subtitle at the timing of the German dialogue. In effect, it superimposes (even if the viewer who is playing does not want to display subtitles).

  As another command related to the sub-picture data 44 recorded together with the forced image output command, when the viewer has set that each sub-image should be displayed, the sub-image is displayed. Display start command and display end command for stopping the output.

  Further, in the DVD 1, the above-described stream numbers (audio stream numbers corresponding to audio and sub-video stream numbers corresponding to sub-video) corresponding to the types of audio and sub-video recorded for each VTS 3 are described. For example, as shown in FIGS. 2A and 2B, the identification information ID is the head of each VTS 3 and the video manager 2 (the identification information ID recorded in the video manager 2 is a summary of the identification information ID of each VTS 3. Is recorded). Here, in FIG. 2 (a), Japanese voice and English voice are recorded corresponding to the stream numbers, respectively, and in FIG. 2 (b), Japanese and English are recorded as sub-pictures (subtitles). , German, French and Chinese subtitles are recorded corresponding to the stream numbers. These languages are actually coded as language codes and described for each stream number. The viewer can select and view these audio and subtitles during playback.

  In FIG. 2, the same stream number corresponds to the same type of language, but does not necessarily correspond to the same language. Although not shown in FIG. 2, depending on the case, separate sub-pictures having the same language can be recorded as separate streams.

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

  Further, in one VOB unit 30, the navigation pack 41 is always present at the head, but the other video data 42, audio data 43, and sub-picture data 44 are not necessarily present in the VOB unit 30. In addition, even if it exists, its number and order are free.

  Here, each division of the video data 42, the audio data 43, and the sub-picture data 44 shown in FIG. That is, in one VOB unit 30, video data 42, audio data 43, and sub-picture data 44 are divided and recorded in packs P, and the pack P in which the video data 42 is recorded is recorded as video. The pack P in which the audio data 43 is recorded is called an audio pack, and the pack P in which the sub-picture data 44 is recorded is called a sub-picture pack. These packs P are recording units set based on the later-described MPEG2 method used when recording information on the DVD 1, and each pack header recorded at the head of each pack P has a recording unit. Read start called SCR (System Clock Reference) indicating the read start time on the playback time axis at which data contained in the pack P is read from a track buffer in a playback apparatus to be described later and input to each buffer is to be started Time information, a start code indicating the start of the pack P, and the like are recorded. For each pack P, video data 42, audio data 43, and sub-picture data 44 are usually recorded for each packet, which is a recording unit obtained by further subdividing the pack P. In general, one pack P is composed of one packet.

  Finally, the navigation pack 41 is DSI which is 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) data 51 and PCI (Presentation Control Information) data 50 that is information related to display control when displaying video or audio searched based on DSI data 51. At this time, the DSI data 51 and the PCI data 50 are recorded as a DSI packet and a PCI packet as the packet PT, respectively.

  Further, all the video data 42 included in one VOB unit 30 is divided and recorded into one or a plurality of GOPs (Group Of Pictures).

  It should be noted that the PCI data 50 includes highlight information defining the display and operation when the item is selected for the selection item selected by the viewer. With this highlight information, for example, a change in screen display for a selected item in a video (so-called menu screen) displaying an item to be selected by the viewer, a display position to be changed, and a command (selection corresponding to the selected item) The instruction to be executed corresponding to the selected item) is set.

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

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

  Furthermore, the outline of the GOP will be described with reference to FIG. FIG. 3 shows an example of a plurality of frame images constituting one GOP 52. FIG. 3 shows a case where one GOP 52 is composed of 12 frame images (the number of frame images included in one GOP 52 is not constant in the MPEG2 system). The frame image indicated by “I” is called an I picture (Intra-coded picture), and refers to a frame image that can reproduce a complete frame image only with its own video. Also, the frame image indicated by the code “P” is called a P picture (Predictive-coded picture), and is compensated and reproduced based on an already decoded I picture or another P picture. This is a predicted video generated by decoding the difference from the predicted video. A frame image indicated by a code “B” is called a B picture (Bidirectionally predictive-coded picture), and is recorded not only on an already decoded I picture or P picture but also on an optical disk or the like. A predicted video that is reproduced by using a future I picture or P picture for prediction. In FIG. 3, the prediction relationship (interpolation relationship) between the pictures is indicated by arrows.

  Note that the MPEG2 system used in the DVD 1 in the present embodiment employs a variable rate system in which the amount of data included in each GOP 52 is not constant. That is, when each picture included in one GOP 52 corresponds to a fast moving video and the correlation between the pictures is small, the amount of data for configuring each picture increases. The amount of data included in the GOP 52 also increases. On the other hand, when each picture included in one GOP 52 corresponds to a moving image that does not move much and the correlation between the pictures is large, the amount of data for configuring each picture is also reduced. The amount of data included in the GOP 52 is also reduced.

  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. 4 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 explanation, starting from the lower hierarchy of FIG. 4, by selecting and combining a plurality of cells 20 from the physical structure explained 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 controller in a playback apparatus to be described later by identifying a partition. The producer can also define one or a plurality of programs 60 as a minimum unit that can be freely selected and viewed by the viewer. This unit is defined as a PTT (Part Of Title). That's it.

  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 handled 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 reproduction order of the cells 20 for each program 60 when the respective programs 60 are reproduced (the program 60 depends on the reproduction order). A unique program number is assigned to each cell.), The address of the recording position of each cell 20 on the DVD 1, the number of the first cell 20 to be reproduced in one program 60, the reproduction method of each program 60 (this embodiment) When recording information on the DVD 1, random playback (random playback using random numbers, the same program 60 may be played multiple times), shuffle playback (using random numbers similar to random playback) during playback. Random playback, but the same program 60 is played only once, and there are multiple same programs 60 PGC61 is a playback method based on any one of loop playback (playing back one PGC 61 many times) or a combination of loop playback and random playback or shuffle playback. Each producer can be selected and played back) and various commands (commands that can be designated by the producer for each PGC 61 or each cell 20). Note that the recording position of the PGCI on the DVD 1 is in the control data 11 as described above. In addition, in the case of PGCI related to the menu in the video manager 2, the control of the video manager 2 (see FIG. 1). It is stored in data (not shown).

  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). 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. 4 corresponds to information included in one VTS 3 shown in FIG. That is, all information included in the logical VTS 63 shown in FIG. 4 is recorded on the DVD 1 as one VTS 3.

  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.

  In the description of the physical structure shown in FIG. 1, it is assumed that a plurality of cells 20 are recorded in the order of ID numbers in order to facilitate understanding of the contents. However, in the DVD 1 of the embodiment, actually, In some cases, one cell 20 is divided and recorded into a plurality of interleaved units IU shown in FIG.

  That is, for example, as shown in FIG. 5, the manufacturer configures one PGC 61A by the cells 20 having ID numbers 1, 2, and 4, and the other PGC 61B by 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, recording on the cell 20 DVD1 of ID number 4 from the recording position on the DVD 1 of the cell 20 of ID number 2 is performed. It takes time to jump the pickup for playback to the position, 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 are played back continuously (hereinafter referred to as “reproduction device”). , This is called seamless playback).

  Therefore, in the case shown in FIG. 5, the input signal of the cell 20 with the ID number 2 and the cell 20 with the 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.

  In this manner, 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.

  When the interleaved unit IU is formed, 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. The VOB unit 30 is not divided and straddles a plurality of interleaved units IU.

  Since the recording information having the logical structure and the logical structure described above needs to record various control information together with the sub-picture data 44 and the audio data 43 corresponding to a plurality of kinds of languages in addition to the video data 42. In addition to recording a single movie, the recording information is a large storage capable of recording audio and subtitles of a plurality of languages on the same optical disc for audio and subtitles corresponding to the movie. It is effective to apply to a DVD 1 having a capacity.

(II) Embodiment of Recording Apparatus Next, FIG. 6 shows an embodiment of a recording apparatus for recording the control information including the identification information ID, the video data 42, the sub-picture data 44, and the audio data 43 on the DVD 1. FIG. It explains using.

  As shown in FIG. 6, the recording device S 1 according to the 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, a multiplexer 75, and the like. , A modulator 77 and a mastering device 78.

  Next, the operation will be described.

  In the VTR 70, recording information R (including the video data 42, sub-picture data 44, and audio data 43), 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 3 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 70, and then performs compression processing using the MPEG2 system, time-multiplexes audio information and 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 controls information for controlling the reproduction of the recorded information R (video manager 2, control data 11, navigation pack 41, PCI data 50, DSI data 51, and identification information in FIG. 1). The control information input in advance based on the cue sheet ST on which the information ID and the like are written is temporarily stored, and is output as the control information signal Si based on a request from the signal processing unit 72.

  Then, the signal processing unit 72 refers to the time code Tt output from the VTR 70 and the control information signal Si output from the memory 71 based on the time code Tt corresponding to the recording information R and the above-mentioned identification from the control information. The information ID is separated and output as a corresponding identification information signal Sac, and the identification information signal Sac is temporarily stored in the hard disk device 74. At this time, the control information stored in the memory 71 other than the identification information ID is not shown in FIG. 6, but is separated in the signal processing unit 72 in the same manner as the identification information ID. 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 reads the identification information signal Sac and other control information from the hard disk device 74, and based on these, the identification information Additional information including ID and other control signals is generated independently, and the corresponding additional information signal Sa is temporarily re-recorded in the hard disk device 74. This is because the contents of each control information are determined by the compressed multiplexed signal Sr performance result.

  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 out and outputs the additional information signal Sa from the hard disk device 74, and adds the compressed multiplexed signal Sr and the additional information signal Sr. An information selection signal Scc for time-multiplexing the information signal Sa is generated and output.

  Thereafter, the compressed multiplexed signal Sr (video data 42, sub-picture data 44, and audio data 43 are individually included for each stream) and the additional information signal Sa are time-multiplexed by the multiplexer 76 based on the information selection signal Scc. Axis multiplexed and output as an information-added compressed multiplexed signal Sap. At the stage of this information-added compression multiplexed signal Sap, the information to be recorded is synthesized with the control information, the video information and the audio data by the switching operation using the information selection signal Scc of the controller 75, and the physical structure shown in FIG. Physical format). The identification information ID is included for each video manager 2 and each VTS 3.

  If sub-picture information exists, it is input to the signal processing unit 72 from other means such as a hard disk device (not shown) and processed in the same manner as video information or 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. 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, according to the recording device S1, the recording information R including the identification information ID is recorded on the DVD 1.

  Therefore, when the recorded information R from the DVD 1 is reproduced, the sub-picture data 44 and the audio data 43 can be selected and reproduced based on the identification information ID. Can play.

  Further, since the forced image output command is recorded together with the identification information ID, it is possible to forcibly display a necessary sub-video during reproduction based on the forced image output command.

  Furthermore, subtitle information described in a plurality of types of languages and audio data 43 configured in a plurality of types of languages are recorded, so that subtitles and audio corresponding to the main video can be output during playback.

(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. 7, the playback apparatus S2 according to the embodiment includes a pickup 80, a signal reading unit 81, a demodulation and correction unit 82, a demultiplexer 83, a main video decoder 84, a sub video decoder 85, and a mixing unit. The controller 86, the audio decoder 87, the controller 88, the setting unit 89, the memory 90, the servo control unit 91, and the spindle motor 92 are configured. Note that the audio data 43 recorded on the DVD 1 in FIG. 7 is recorded in Japanese and English, and the sub-picture data 44 is in Japanese, English, German, French, and Chinese. Is recorded. As a result, the identification information ID shown in FIG. 2 is recorded as the identification information ID.

  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.

  The detection signal Sp output from the pickup 80 is input to the signal reading unit 81 where the detection signal Sp is read, separated into a detection data signal Spd and a detection clock signal Spc, and servo control described later. Servo signal Ssb2 for output is output.

  The detection data signal Spd and the detection clock signal Spc output from the signal reading unit 81 are input to the demodulation correction unit 82, subjected to demodulation processing and error correction processing to generate a demodulation signal Sdm, and output to the demultiplexer 83. The In parallel with this, a servo signal Ssb1 for servo control described later is output based on the detected clock signal Spc.

  In the demultiplexer 83 to which the demodulated signal Sdm is input, the video data 42, the audio data 43, and the sub-picture data 44 as main video information are separated from the demodulated signal Sdm, and the video signal Sv, the sub-video stream signal Ssp, and the audio are separated. The stream signal Sa is output to the main video decoder 84, the sub video decoder 85, and the audio decoder 87, respectively. In parallel with this, the demultiplexer 83 separates the additional information signal Sa corresponding to the additional information including the identification information ID and other control information from the demodulated signal Sdm and outputs the separated additional information signal Sa to the controller 88.

  When a plurality of languages are included as the audio data 43 or the sub-picture data 44, the setting unit 89 uses the selected stream signal Ss from the controller 88 when separating each data from the demodulated signal Sdm. Only the audio stream signal Sad and the sub video stream signal Ssp corresponding to the set audio language (#N in FIG. 7) and the sub video language (#K in FIG. 7) are selected by the demultiplexer 83. Is output.

  The main video decoder 84 to which the video signal Sv is input is demodulated by the MPEG2 system and output to the mixer 86 as a demodulated video signal Svd.

  On the other hand, the sub-picture decoder 85 to which the sub-picture stream signal Ssp is input demodulates the sub-picture data 44 included in the sub-picture stream signal Ssp and outputs the demodulated sub-picture signal Sspd to the mixer 86 via the switch SW. . In parallel with this, the sub-picture decoder 85 separates the command such as the forced image output command included in the sub-picture stream signal Ssp together with the sub-picture data 44 and outputs the command to the controller 88 as a command signal Sc.

  The demodulated video signal Svd output from the main video decoder 84 and the demodulated sub-video signal Sspd output from the sub-picture decoder 85 (synchronized with the corresponding demodulated video signal Svd) are mixed by the mixer 86. The signals are mixed and output as a final video signal Svp to be displayed to a display unit such as a CRT (Cathode Ray Tube) (not shown).

  Next, the audio decoder 87 to which the audio stream signal Sad is input performs predetermined decoding on the input audio stream signal Sad and outputs it as a demodulated audio signal Sadd to a speaker (not shown) or the like.

  On the other hand, the controller 88 controls the output of the sub-picture based on the additional information signal Sa and the command signal Sc including the identification information ID and other control information input from the demultiplexer 83 and the input signal Sii from the setting unit 89. Therefore, the sub-picture output signal Ssb is output to the switch SW. The switch SW is activated by the sub-picture output signal Ssb, and the output of the demodulated sub-picture signal Sspd is controlled, thereby controlling the display of the sub-picture.

  In parallel with this, when the sub video to be displayed is selected by the sub video selection unit 89A of the setting unit 89, the controller 88 outputs the stream number and language to the memory 90 for recording, and also sets the sub unit. When an audio language to be output is selected by an audio selection unit (not shown), the stream number and language are output to the memory 90 and recorded. In FIG. 7, an English sub-picture is selected as the sub-picture to be displayed, the corresponding stream number # 2 (see FIG. 2) is stored in the memory 90, and English-language voice is selected as the voice to be output. The corresponding stream number # 2 (see FIG. 2) is stored in the memory 90.

  The sub-picture language selection operation in the sub-picture selection unit 89A is cyclic, for example, as shown in FIG. 8, that is, one language is operated every time a button or the like in the sub-picture selection unit 89A is operated once. Only one changing operation is performed continuously, whereby the selection operation is performed. Here, in FIG. 8, “non-selection” means that the display of the sub-video is turned off.

  Further, the controller 88 outputs the stream number corresponding to the selected sub-picture to be displayed and the stream number corresponding to the audio to be output to the demultiplexer 83 as the selected stream signal Ss.

  As described above, the user needs to designate the sub-picture stream number to be displayed or the sub-picture language at the start of each title reproduction. Similarly, for audio, it is necessary to specify an audio stream number to be reproduced or an audio language.

  In addition to this, in the present embodiment, the controller 88 causes the setting unit 89 to display a unique playback display language specific to the playback device S2, such as the sub-picture stream number to be displayed or the language of the sub-picture. When the audio stream number to be reproduced or the language of the audio is not designated, the default language that is the language of the sub-picture to be displayed or the language of the audio to be reproduced is set. The unique reproduction display language is output to the memory 90 and stored. FIG. 7 shows a state where Japanese is set and stored as the inherent playback display language of the playback device S2. At this time, the area in the memory 90 for storing the unique playback display language of the playback device S2 is configured by a non-volatile memory unlike the other regions, and even when the power of the playback device S2 is turned off, the playback device The unique playback display language of S2 is retained.

  Thus, once the unique playback display language of the playback device S2 is set, the user can set the sub-picture stream number or sub-picture language to be displayed and the audio stream number or audio language to be played back. Even when omitted, it is possible to reproduce and display the sub-picture or audio in the language set as the specific reproduction display language.

  The setting unit 89 includes a sub-video display switching unit 89B for switching on / off of the sub-video display. The setting content in the sub-video display switching unit 89B is included in the input signal Sii to the controller 88. As a result, the output of the sub-picture output signal Ssb (that is, the activation of the switch SW) is controlled.

  In parallel with these operations, the servo control unit 91 outputs a servo control signal Sb1 for focus servo control and tracking servo control in the pickup 80 based on the servo signals Ssb1 and Ssb2, and the spindle motor 92 A servo control signal Sb2 for controlling the rotation is output.

  In the pickup 80, focus servo control and tracking servo control are performed based on the servo control signal Sb1, and the light beam B as reproduction light is correctly irradiated onto the information track on which information on the DVD 1 is recorded. . The spindle motor 92 rotates the DVD 1 correctly based on the servo control signal Sb2.

  Next, a display control operation at the time of forced output of a sub-picture using the identification information ID (see FIG. 2) in the playback device S2 will be described using the flowchart shown in FIG. To do. In the flowchart shown in FIG. 9, it is assumed that the sub video display switching unit 89 </ b> B of the setting unit 89 is set not to display the sub video.

  As shown in FIG. 9, in the sub-picture display control operation using the identification information ID, first, based on the control signal Sc from the sub-picture decoder 85, is the forced picture output command detected from the demodulated signal Sdm? It is determined whether or not (step S1).

  When the forced image output command is not detected (step S1; NO), the main video or the like is output as it is. When the forced image output command is detected (step S1; YES), the sub-image selection unit 89A It is determined whether the sub-picture language is selected and stored in the memory 90 (step S2). When it is selected (“# 2; English” in the memory 90 shown in FIG. 7) (step S2; YES), the sub-picture corresponding to that language (English in this case) is forcibly output (step S2). S3) The process is terminated.

  On the other hand, if it is determined in step S2 that the sub-picture language is not selected in the sub-picture selection unit 89A (step S2; NO), then the language of the audio to be output is selected in the setting unit 89. It is determined whether or not there is (step S4). If the language of the voice to be output is selected (“# 2; English” in the memory 90 shown in FIG. 7) (step S4; YES), then the language of the selected voice is selected. It is determined whether or not the sub-picture data 44 of the same language is included in the demodulated signal Sdm (step S5), and if included (step S5; YES), the same language as the language of the selected speech The sub-picture corresponding to (in this case, English) is forcibly output (step S6), and the process ends. In the process of step S6, when there are a plurality of sub-pictures corresponding to the same language as the audio language (not shown in FIG. 2), the smallest stream among the sub-pictures having the same language. Displays sub-pictures with numbers.

  Also, in the determination in step S4, if the language of the sound to be output is not selected (step S4; NO), or even if the language of the sound to be output is selected, sub-picture data in the same language as that language If 44 is not included in the demodulated signal Sdm (step S5; NO), next, it is set in advance and whether or not the unique reproduction display language of the reproduction apparatus S2 is stored in the nonvolatile area of the memory 90 is determined. Determination is made (step S7). If the unique playback display language of the playback device S2 is set (“Japanese” in the memory 90 shown in FIG. 7) (step S7; YES), then the playback device S2 selected is selected. It is determined whether or not the sub-picture data 44 in the same language as the inherent reproduction display language is included in the demodulated signal Sdm (step S8). If included, the reproduction apparatus is selected (step S8; YES). The sub-picture corresponding to the same language (in this case, Japanese) as the unique reproduction display language of S2 is forcibly output (step S9), and the process is terminated. In the process of step S9, when there are a plurality of sub-pictures corresponding to the same language as the unique reproduction display language (not shown in FIG. 2), the sub-pictures with the same language are the most. Displays sub-pictures with a small stream number.

  Further, in the determination in step S7, if the unique reproduction display language of the reproduction device S2 is not set (step S7; NO), or the unique reproduction display language of the reproduction device S2 is set, the same language as that language is set. If the sub-picture data 44 is not included in the demodulated signal Sdm (step S8; NO), then the sub-picture of the first stream in the preset sub-picture data 44 is forcibly output. (Step S10), the process is terminated.

  According to the operation of the playback device S2 described above, the memory 90 stores the language of the sub-picture to be played back and the language of the audio or the playback playback language unique to the playback device S2, and based on these, the identification information ID is stored. Since the sub-video display is controlled by using the sub-video, it is possible to select and reproduce an appropriate type of sub-video and audio that respects the viewer's will during playback.

  Further, since the forced image output command is extracted together with the identification information ID, a necessary sub-video can be forcibly displayed during reproduction based on the forced image output command.

  Furthermore, subtitle information described in a plurality of types of language and audio information configured in a plurality of types of language are recorded, so that it is possible to reproduce appropriate subtitles and audio corresponding to the main video during reproduction.

  In the above embodiment, the sub-picture language to be played back and the language of the audio or the inherent playback display language are stored, and based on these, the display of the sub-picture is controlled using the identification information ID. As described above, the present invention is also applicable to the case where the selection of the audio language to be reproduced is controlled using the identification information ID based on the stored sub-picture language and audio language to be displayed or the inherent reproduction display language. Applicable. In this case, if the language of the sub-picture to be played back and the language of the audio are set, the audio of the set language is played based on them, and only the unique playback display language is set. If so, the sound corresponding to the specific reproduction display language is reproduced.

  Furthermore, in the above embodiment, the example in which the present invention is applied to the DVD 1 has been shown. However, the present invention is not limited to this, and main video, sub-video, and audio are recorded on an information recording medium other than the optical disk. Therefore, it can be widely applied when reproducing this.

It is a figure which shows the physical structure (physical format) of recording information. FIG. 2A is a diagram illustrating an example of identification information, FIG. 2A is a diagram illustrating a case of an audio stream, and FIG. 2B is a diagram illustrating a case of a sub-video stream. It is a figure which shows the frame image which comprises GOP. It is a figure which shows the logical structure (logical format) of recording information. It is a figure which shows the recording information divided | segmented into the interleaved unit. FIG. 2 is a block diagram illustrating a schematic configuration of a recording apparatus. It is a block diagram which shows schematic structure of a reproducing | regenerating apparatus. It is a figure explaining the selection operation | movement of the language of a subvideo. It is a flowchart which shows the display control operation | movement of a subpicture.

Explanation of symbols

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 52 GOP
60 programs 61, 61A, 61B PGC
62 Title 70 VTR
71 Memory 72 Signal Processing Unit 73, 74 Hard Disk Device 75 Controller 76 Multiplexer 77 Modulator 78 Mastering Device 80 Pickup 81 Signal Reading Unit 82 Demodulation Correction Unit 83 Demultiplexer 84 Main Video Decoder 85 Sub Video Decoder 86 Mixer 87 Audio Decoder 88 Controller 89 Setting section 89A Sub-picture selection section 89B Sub-picture display switching section 90 Memory 91 Servo control section 92 Spindle motor B Light beam ID identification information S1 Recording device S2 Reproducing equipment ST Cue sheet Sr Compression multiplexed signal Si Control information signal Sac Identification information Signal Sa Additional information signal Scc Information selection signal Sm Disc recording signal Sap Information additional compression multiplexed signal Sp detection signal Spd detection data signal Spc detection clock signal Sdm demodulation signal Ssb1, Ssb2 Servo signal Sb1, Sb2 B control signal Sii Input signal Sad Audio stream signal Ssp Sub video stream signal Sv Video signal Svd Demod video signal Sspd Demod sub video signal Sadd Demod audio signal Svp Video signal Ss Select stream signal Sc Command signal Ssb Sub video output signal Tt Time code R Record information

Claims (6)

Video information, audio information, and sub-video information are multiplexed and recorded, and a forced image output command for forcibly displaying the sub-image information and a display start command for starting display of the sub-image information And a display end command for stopping the display, and an information reproducing apparatus for reproducing a recording medium on which a data stream in which multiple recording is recorded is recorded,
  Sub-image control means for performing display control of the sub-image information based on the forced image output command, the display start command, and the display end command;
  Storage means for storing type specifying information for specifying the type of the sub-image information to be displayed;
  With
  Further, the sub-image control means outputs the sub-image information corresponding to the stored type specifying information when detecting the forced image output command. The information reproducing apparatus according to claim 1,
The information reproducing apparatus, wherein the type specifying information indicates the type specified in advance by a user. The information reproducing apparatus according to claim 1 or 2,
The type reproduction information includes initial setting information for identifying the sub-image information corresponding to the sub-image to be displayed when the type is not specified by the user. apparatus. Video information, audio information, and sub-video information are multiplexed and recorded, and a forced image output command for forcibly displaying the sub-image information and a display start command for starting display of the sub-image information And a display end command for stopping the display, and an information reproducing method executed in an information reproducing apparatus for reproducing a recording medium on which a data stream in which multiple recording is recorded is recorded,
  The information reproducing apparatus includes storage means for storing type specifying information for specifying the type of the sub-image information to be displayed,
  A sub-image control step for controlling display of the sub-image information based on the forced image output command, the display start command, and the display end command, and storing the memory when the forced image output command is detected. And a sub-image control step for outputting the sub-image information corresponding to the type specifying information. The information reproduction method according to claim 4 ,
The information reproducing method, wherein the type specifying information indicates the type specified in advance by a user. The information reproduction method according to claim 4 or 5,
  The type reproduction information includes initial setting information for identifying the sub-image information corresponding to the sub-image to be displayed when the type is not specified by the user. Method.

Images