JP2012174328A - Video information playback method and video information playback device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten a waiting time when restarting playback from a playback stop position about content whose video playback is controllable by a program operating on a virtual machine.SOLUTION: A control part 120 determines from playback control information recorded in an optical disk 101 whether a virtual machine use type content recorded in the optical disk 101 as a recording medium is a first kind of content whose video can be played back both when a program operating on the virtual machine is active and when the program is not active or a second kind of content whose video can be played back only when the program is active, and makes a playback part 110 restart video playback from a position at which the video playback is stopped without activating the program when the virtual machine use type content is the first kind content.

Description

  The present invention relates to a video information playback method and a video information playback apparatus, and in particular, video information playback for playing back video from a recording medium recording virtual machine-based content that can be played back by a program operating on a virtual machine. The present invention relates to a method and a video information reproducing apparatus.

  There is a DVD (registered trademark) player as a device for reproducing video contents such as movies and dramas. In order to control the reproduction of video with a DVD player, a navigation command, which is a relatively simple control language, is used. In addition, Blu-ray (registered trademark) players capable of reproducing content recorded as high-vision have begun to spread. In the Blu-ray standard, a Java (registered trademark) virtual machine is employed in order to enable viewing of complex and highly interactive content (see, for example, Patent Document 1).

JP 2009-193642 A

  DVD playback data is composed of video data, audio data, graphic data, and video control data. The video data, audio data, and graphic data are superimposed on one file. Generally, in a DVD player, when DVD playback is stopped (suspended or suspended) and then restarted (resume), playback resumes from the previous playback stop position after a waiting time of several seconds to several tens of seconds has elapsed ( (Resume). In this case, all the data required for playback such as video data and audio data is superimposed on one file, and playback is resumed from the playback stop position by reloading the management information file with a very small file size. Since this is possible, the waiting time before resuming playback is short.

  However, when resuming playback of a Blu-ray disc that stores content using a Java virtual machine, all the data stored in the memory must be saved when playback is stopped. Very big. For this reason, depending on the Blu-ray player, even if it is configured not to be able to perform resume playback or configured to be able to perform resume playback, the processing time for performing resume playback is very long. It was becoming. Therefore, in the Blu-ray player, when playback of the video included in the content using the Java virtual machine is stopped and then restarted, for example, a Blu-ray disc is inserted into the device It may be required to restart the playback operation from the state immediately after it, the playback is restarted from the beginning of the video that was being viewed, or it may take several tens of seconds to several minutes to restart the playback. It was. For this reason, the resume playback in the Blu-ray player has a problem that the convenience for the user is greatly impaired.

  Therefore, the present invention has been made to solve the above-described problem, and its purpose is to resume playback from a playback stop position for content whose video playback can be controlled by a program operating on a virtual machine. In addition, the waiting time can be shortened.

  A video information playback method according to an aspect of the present invention includes a program that operates on a virtual machine, virtual machine-based content that can be controlled by the program, and playback control information for the virtual machine-based content. A video information playback method performed by a video information playback device including a playback unit that performs processing for playing back the video from a recording medium in which a playlist file is recorded, and a control unit, wherein the control unit includes: The virtual machine utilization type content is the first type of content that can play back video both when the program is activated and when the program is not activated, or the program is activated Determination based on the playback control information whether the content is the second type of content that can be played back only when When the playback of the video of the virtual machine usage type content is stopped and the playback of the video is resumed, the control unit determines that the virtual machine usage type content is the first type of content in the determination process. If it is determined that there is a playback restarting process, the playback unit restarts playback of the video from the position where playback of the video is stopped without starting the program. And

  According to one aspect of the present invention, it is possible to reduce the waiting time when the reproduction of a content whose video reproduction can be controlled by a program operating on a virtual machine is resumed from the reproduction stop position.

It is a block diagram which shows roughly the structure of a video information reproducing | regenerating apparatus. It is a figure which shows an example of a structure of the file and directory required for reproduction | regeneration. It is the schematic which shows an example of the syntax of a plst file. It is the schematic which shows the detail of UO_permission_table. It is a figure which shows an example of the relationship between a play list and a stream file. It is a figure which shows an example of the syntax of a clip file. Movie. It is the schematic which shows an example of the syntax of a title file. It is the schematic which shows an example of a structure of a jar file. test. class and test $ timer. It is the schematic (the 1) which shows an example of the source code before the compilation of class. test. class and test $ timer. It is the schematic (the 2) which shows an example of the source code before the compilation of class. test. class and test $ timer. It is the schematic (the 3) which shows an example of the source code before the compilation of class. (A) And (B) is the schematic for demonstrating the procedure in which the image | video of the content controlled by the program which operate | moves on a Java virtual machine is performed. It is a flowchart which shows the determination process in a video information reproducing | regenerating apparatus. It is a flowchart which shows the process which stops reproduction | regeneration in a video information reproducing | regenerating apparatus, and restarts. (A)-(C) are the schematics for demonstrating the reproduction | regeneration stop position and reproduction | regeneration resumption position in a video information reproducing | regenerating apparatus.

  FIG. 1 is a block diagram schematically showing a configuration of a video information reproducing apparatus 100 according to an embodiment of the present invention. The video information reproducing apparatus 100 according to the present embodiment is an apparatus that reproduces video or the like from a recording medium on which one or a plurality of contents whose video reproduction can be controlled by a program operating on a virtual machine is recorded. Further, the recording medium according to the present embodiment is a disc-shaped recording medium such as an optical disc, for example. The optical disc is, for example, a DVD, a CD, a Blu-ray disc (BD), or the like. Furthermore, the virtual machine is, for example, a Java virtual machine. As shown in FIG. 1, the video information playback apparatus 100 includes a playback unit 110, a control unit 120, a storage unit 130, and an input unit 140.

  The reproducing unit 110 performs processing for reproducing video and audio based on information recorded on the recording medium. For example, the playback unit 110 includes a drive 111, a demultiplexer 112, a caption decoder 113, a video decoder 114, an audio decoder 115, and a graphics superimposing unit 116.

The drive 111 reads information from the optical disc 101 as a recording medium. In the present embodiment, the optical disc 101 is a Blu-ray disc, but may be another type of recording medium. In the present embodiment, the optical disc 101 has one or more Java virtual machine programs, a program that operates on the Java virtual machine, and a video that can be controlled by a program that operates on the Java virtual machine. Virtual machine utilization type content and a playlist file including reproduction control information of the virtual machine utilization type content are recorded.
The demultiplexer 112 separates the information read by the drive 111 into information such as caption information, video information, and audio information.

The subtitle decoder 113 decodes the subtitle information separated by the demultiplexer 112 and generates a subtitle signal.
The video decoder 114 decodes the video information separated by the demultiplexer 112 and generates a video signal.
The audio decoder 115 decodes the audio information separated by the demultiplexer 112 and generates an audio signal. The audio signal generated by the audio decoder 115 is output to the audio output device 103 such as a speaker.

  In response to an instruction from the control unit 120, the graphics superimposing unit 116 adds at least one of the subtitle signal generated by the subtitle decoder 113 and the graphic signal generated by the control unit 120 to the video signal generated by the video decoder 114. One of them is superimposed to generate a superimposed video signal. The superimposed video signal is output to the display device 102. The graphics superimposing unit 116 is generated by the video decoder 114 when neither the subtitle signal generated by the subtitle decoder 113 nor the graphic signal generated by the control unit is superimposed according to an instruction from the control unit 120. The received video signal is output to the display device 102.

  The control unit 120 controls the entire processing in the video information playback apparatus 100, and in particular controls the playback unit 110 to control processing for playing back video and audio. For example, the control unit 120 includes a reproduction control unit 121 and a determination unit 122. The control unit 120 can be realized by executing a predetermined program on the CPU.

The playback control unit 121 controls the playback unit 110 to play back video and audio from the content recorded on the optical disc 101. Further, the playback control unit 121 executes a Java virtual machine program recorded on the optical disc 101 and a program operating on the Java virtual machine. Then, the reproduction control unit 121 executes these programs to generate a graphic signal, and gives this graphic signal to the graphics superimposing unit 116.
Furthermore, the playback control unit 121 controls the resume playback process according to the determination result of the determination unit 122. For example, the playback control unit 121 is a program that operates on a Java virtual machine when a program that operates on a Java virtual machine is activated by the determination unit 122 as a virtual machine usage-type content that is to be restarted. If it is determined that the content is the first type of content that can be played back at any time when is not started, the playback unit is started from the playback stop position without starting the program operating on the Java virtual machine. 110 resumes playback. On the other hand, the reproduction control unit 121 can reproduce the video only when the virtual machine utilization type content to be reproduced is restarted by the determination unit 122 when the program operating on the Java virtual machine is activated. If it is determined that the content is the second type of content, the playback unit 110 restarts playback after starting a program that runs on the Java virtual machine. If it is determined that the virtual machine utilization type content to be replayed is the second type of content, the playback control unit 121 causes the playback unit 110 to start playback of the content on the optical disc 101 or resume playback. Playback is resumed from a predetermined position such as the top of the target virtual machine utilization type content.

  The determination unit 122 reproduces the video using the virtual machine-use content stored on the optical disc 101 both when the program operating on the virtual machine is activated and when such a program is not activated. It is determined whether the content is the first type of content that can be played back or the second type of content that can be played back only when a program running on the virtual machine is running.

The storage unit 130 stores information necessary for processing in the control unit 120. For example, the storage unit 130 stores information necessary for the resume reproduction by the control unit 120. The storage unit 130 can be realized by, for example, a nonvolatile memory.
The input unit 140 receives an instruction input from the user. For example, the input unit 140 can be realized by a remote controller or the like.

  FIG. 2 is a diagram showing an example of the configuration of files and directories necessary for reproduction recorded on the optical disc 101 as a recording medium. “Movie.title” shown in FIG. 2 is Movie.title in which information necessary for controlling the title, which is the highest playback unit, is described. It is a title file. “PLST” shown in FIG. 2 is a PLST folder in which a plst file (playlist file) in which information (playback control information) necessary for playback control of a playlist (PlayList) is described is stored. In the PLST folder, there are a plurality of “xxx.plst” which are plst files. Here, “xxx” is identification information for identifying each plst file, and in the present embodiment, is a three-digit number that is unique in each plst file. “CLIP” shown in FIG. 2 is a CLIP that stores a clip file in which information necessary for playback control of the stream file stored in the “STREAM” folder shown in FIG. 2 is stored. It is a folder. In the CLIP folder, there are a plurality of “yyy.clpi” clip files. Here, “yyy” is identification information for identifying each clip file, and in the present embodiment, it is a three-digit number that is unique in each clip file. The clip file and the stream file have a one-to-one correspondence. For example, when the clip file “123.clpi” exists in the CLIP folder, the clip file and stream file have “123.clpi” in the STREAM folder. There is a corresponding stream file “123.strm”. “STREAM” shown in FIG. 2 is a STREAM (stream) folder in which strm files necessary for reproduction of video, audio, subtitles, and the like are stored. In the STREAM folder, there are a plurality of stream files “zzz.strm”. Here, “zzz” is identification information for identifying each stream file, and is a three-digit number that is unique in each stream file in the present embodiment. The stream file is composed of TS (transport stream), and is a file on which video information, audio information, and subtitle information having a unique packet ID are superimposed. “JAR” shown in FIG. 2 is a JAR (Java Archive) folder that stores an application that operates on a Java virtual machine and performs title reproduction control. In the JAR folder, “¥¥¥ .jar”, which is a jar file obtained by compressing a set of files necessary for running a Java application into a ZIP format, is present. Here, “¥¥¥” is identification information for identifying each jar file, and is a three-digit number that is unique in each jar file.

  FIG. 3 is a schematic diagram illustrating an example of the syntax of the plst file “xxx.plst”. When “playback_type” is played back sequentially from the beginning to the end of the playlist, the value becomes “0”, and when playback changes from one playback point in the playlist to another playback point. The value becomes “1”. “Number_of_stream” indicates the total number of stream files to be reproduced in the playlist. “UO_permission_table” indicates whether or not a user operation can be performed during playback of the stream. Note that “UO_permission_table” will be described in detail later. The next “for” and subsequent loops are repeated as many as “number_of_stream”. In addition, “stream_file_name” in this loop describes the file name of the stream file to be reproduced. If the value of “still_play” is “0”, the next stream is not reproduced at the end of the stream, but the next stream is reproduced. If the value is “1”, Indicates a transition to playback of the next stream after the still state has been reached for the time described in “still_time” at the end of the stream. In “in_time” and “out_time”, the start time and the end time of the part to be reproduced of the stream file are respectively described. These times are described in a PTS (Presentation Time Stamp) added to the stream file packet.

FIG. 4 is a schematic diagram showing details of “UO_permission_table”. “Time_search” indicates whether or not a time search is possible. “Skip_up” indicates whether or not skip-up to the next chapter can be performed. “Skip_down” indicates whether skipping down to the previous chapter is possible. “Stop” indicates whether or not playback can be stopped. “Pause_on” indicates whether playback can be paused. “Forward_play” indicates whether fast-forward playback is possible. “Backward_play” indicates whether fast reverse playback is possible.
“Subtitle_change” indicates whether captions can be turned ON / OFF. “Audio_change” indicates whether or not voice switching is possible. “Angle_change” indicates whether or not the angle can be switched. Here, in “UO_permission_table”, when the value indicated by each item is “0”, it indicates that the target user operation is permitted, and when the value is “1”, it becomes the target. Indicates that user operation is prohibited.

  FIG. 5 is a diagram illustrating an example of a relationship between a playlist (PlayList) indicated in a plst file and a stream file. As shown in FIG. 5, in this playlist, the portion from “in_time” to “out_time” of “001.strm” and the portion from “in_time” to “out_time” of “003.strm” Are reproduced sequentially. In other words, the total playback time of the playlist is a value obtained by summing the differences between “in_time” and “out_time” for each stream file.

  FIG. 6 is a diagram illustrating an example of the syntax of the clip file “yyy.clpi”. In the clip file, superimposition information such as video information and audio information of the stream file paired therewith, and index information necessary for random access and the like are described. In “stream_info ()”, attribute information such as superimposed video information, audio information, and caption information is described. However, since “stream_info ()” is not directly related to the present invention, detailed description thereof is omitted. In addition, “index_info ()” describes time information and position information at the head of each GOP of the stream file. “Number_of_GOP” indicates the total number of GOPs (Group of Pictures) included in the stream file. The loop following “for” is repeated as many times as “number_of_GOP”. “Start_PTS” included in this loop indicates PTS information included in the I picture at the head of the GOP. “Relative_byte” included in this loop indicates the relative number of bytes from the head of the stream file to the head of the I picture.

  FIG. 7 is a schematic diagram illustrating an example of the syntax of the “Movie.title” file. “Number_of_title” indicates the total number of titles recorded on the optical disc. The loop following “for” is repeated as many times as “number_of_title”. “Title_type” has a value of “1” when title playback is controlled from a Java application, and has a value of “0” when title control is not controlled. The value of “title_attribute” is “1” when the title is a title for displaying a menu screen, and the value is “0” when the title is not a title for displaying a menu screen. The next “if” statement describes the file name of the jar file in which the Java application is stored when the value of “title_type” is “1”. The file name of the jar file is, for example, “123.jar”. The next “else” statement describes the file name of the playlist to be played when the value of “title_type” is “0”. The file name of the playlist to be played back is, for example, “123.plst”. “Next_title_id” describes “title_id” for identifying a title to be reproduced next when reproduction of the currently reproduced title is completed.

  When the optical disc 101 is inserted into the drive 111, the drive 111 reads the “Movie.title” file as shown in FIG. 7 from the optical disc 101 according to the control of the playback control unit 121. Using the “Movie.title” file read from the optical disc 101 by the drive 111, the playback control unit 121 first performs processing according to the title information described at the top. Here, if the value of “title_type” is “1”, the value of “title_attribute” is “0”, and the jar file described in the “if” statement is “001.jar”, playback control is performed. The unit 121 reads and analyzes “001.jar”.

  FIG. 8 is a schematic diagram showing an example of the configuration of “001.jar” corresponding to a jar file. In FIG. 8, the “001.jar” file is composed of three files “test_img.png”, “test.class”, and “test $ timer.class”. “Test_img.png” is a file obtained by compressing image data used in the Java program included in the “001.jar” file in the PNG format. “Test.class” and “test $ timer.class” are executable files obtained by compiling a Java program into an execution format. Since the file identified by “.class” is a file after compilation, the operation of “test.class” and “test $ timer.class” will be described below using the source code before compilation. .

  9 to 11 are schematic diagrams illustrating examples of source code before compiling “test.class” and “test $ timer.class” illustrated in FIG. FIG. 9 shows the head part of an example of the source code before compilation of “test.class” and “test $ timer.class” shown in FIG. FIG. 10 shows a part of the source code before compiling “test.class” and “test $ timer.class” shown in FIG. FIG. 11 shows a part following FIG. 10 of an example of the source code before compilation of “test.class” and “test $ timer.class” of FIG.

  The T1 part of the source code shown in FIG. 9 is a part for importing a package necessary for executing this application. Since playback of a playlist is not supported in Java, “org.disc.net.DiscLocator” is a package specific to the present embodiment prepared for playback of a playlist.

  The T2 portion of the source code shown in FIG. 9 is a portion where variables are declared. The description below “I_POS [] []” indicates graphics coordinate information used when the display is changed every second. When the sample image “sample_img.png” is decoded, panel images such as “1” to “30” shown in FIG. 12A are developed. For example, the description of {128, 0, 256, 128} shown in FIG. 9 is the coordinates indicated by (X1, Y1) = (128, 0) and (X2, Y2) = (256, 128). This means that a square portion having the indicated coordinates as vertices (two vertices existing on a diagonal line) is cut out, and a portion displayed as “11” in FIG. 12A is cut out.

  The T3 portion of the source code shown in FIG. 10 is a portion that reads the sample image “sample_img.png” and decodes the PNG file. This application proceeds to the processing of the T4 portion of the source code shown in FIG. 10 after the decoding is completed.

  The T4 part of the source code shown in FIG. 10 is a part for executing reproduction of a playlist (PlayList). Since “iPlayListID = 1” is described here, reproduction of “001.plst” is instructed. When playback of “001.plst” is instructed, data read from the optical disc 101 by the drive 111 is separated into subtitle information, video information, and audio information by the demultiplexer 112, and the subtitle information is subtitle decoder 113. The video information is decoded by the video decoder 114, and the audio information is decoded by the audio decoder 115.

  At the same time as the reproduction of the playlist (PlayList) is started, the reproduction control unit 121 performs “1” to “30” shown in FIG. 12A according to the T5 part of the source code shown in FIG. Is extracted from the decoded PNG file, and a graphic signal is generated based on the extracted image data. The graphics signal generated by the playback control unit 121, the video signal output from the video decoder 114, and the caption signal output from the caption decoder 15 are superimposed by the graphic superimposing unit 116, and the image signal of the superimposed image is displayed. Is output to the external display device 102.

  As described above, the content controlled by the program operating on the Java virtual machine can display a more complicated video than the content not controlled by the program operating on the Java virtual machine. However, in content controlled by a program operating on a Java virtual machine, there is a problem that a waiting time of several tens of seconds to several minutes occurs after the start of playback is instructed by a user operation until playback is started. is there. In general, graphics used in a Java application are described so as to finish decoding of a PNG file before reproduction is started. The T3 portion shown in FIG. 10 corresponds to the time during which PNG data is decoded. As described above, the reason for decoding PNG data or JPEG data before starting reproduction is that the decoding process of PNG data or JPEG data is very burdensome for the CPU of an embedded device for realizing a specific function. This is because if graphics is decoded while executing a program operating on a Java virtual machine, graphics display may not be executed smoothly.

  FIGS. 12A and 12B are schematic diagrams for explaining a procedure for playing back a video of content (using the Java virtual machine) controlled by a program operating on the Java virtual machine. The video of the content to be played here is based on one playlist file, and sequentially displays the panel images on which numbers “1” to “30” are written at intervals of 1 second from the start of playback. When the reproduction of the video stored in the stream file indicated in the playlist is completed, the application is terminated. In the example shown in FIG. 12A, images of 128 pixels in height and width are sequentially displayed on a video screen of 1920 × 1080 pixels, with the coordinates of 256 pixels in the vertical and horizontal directions as the origin (0, 0). Is done.

  In addition, even if playback is stopped (suspended or suspended), content that is not controlled by a program running on the Java virtual machine (not using the Java virtual machine) can be restarted from the playback stop position (resume playback). Although it is possible, there is a problem that the content controlled by the program operating on the Java virtual machine cannot be resumed. For example, as shown in FIG. 12A, in the reproduction process of sequentially displaying the images of the panels “1” to “30” at intervals of 1 second, the reproduction is performed when the image of the panel “15” is displayed. Assume that it was interrupted. Thereafter, in order to resume playback (resume playback) from the time point when the image of the “15” panel is displayed, the CPU and the external memory (RAM) of the CPU when the image of the “15” panel is displayed are displayed. ) And all the information and information stored in a non-volatile memory such as a flash memory. However, in a consumer embedded device that is required to be manufactured at a low cost, such a configuration cannot be adopted, so that it is practically impossible to have a function of restarting playback from the playback stop position.

  Since playback of content using a Java virtual machine has the above-mentioned problems, the user can resume playback from the beginning of the content after waiting for several tens of seconds as shown in FIG. It is necessary to replay the video and wait for the playback to proceed to the playback stop position, which greatly impairs user convenience when restarting playback.

  In content whose playback is controlled by a Java program operating on a Java virtual machine, both video based on video information recorded on the optical disc 101 and graphics created by the Java program must be displayed. While there is content that does not make sense (cannot provide accurate information or appropriate information to the user), only the video is displayed during normal playback, and is created by the Java program only when the user operates the remote control etc. Some content also displays graphics. For example, in the case of movie content created with a Java application on a Blu-ray disc, if a pop-up menu key is operated during the main movie playback, audio selection and subtitle selection are performed on the video of the movie being played. Alternatively, a menu screen, which is graphics described by a Java program, such as a scene search, is displayed. In this way, there is content in which graphics displayed by the Java program do not affect normal reproduction of video information recorded on the optical disc. In the case of such content, if it can be handled in the same way as content that is not controlled by a Java program that runs on the Java virtual machine (does not use the Java virtual machine), the function realized by the Java program Although there is a restriction that cannot be used, quick resume playback is possible.

  However, as shown in FIG. The title file does not indicate whether or not there is no problem in reproducing the main content even if the Java program is not activated in the content whose reproduction can be controlled by the Java program operating on the Java virtual machine. For this reason, Movie. A title file cannot be resumed in the main part of a movie.

  Therefore, in the video information playback apparatus 100 according to the present embodiment, there is a problem in playback of the main part from the information described in the plst file recorded on the optical disc 101 even if the Java program is not activated. The control unit 120 can determine whether or not there is.

  FIG. 13 is a flowchart showing determination processing in video information reproduction apparatus 100 according to the present embodiment. In step S1, the determination unit 122 confirms the value of “playback_type” of the playlist file. Generally, the main part of a movie is generally played continuously from the beginning to the end of the playlist, and playback that goes back and forth in the middle of the main part is not performed. When the value of “playback_type” is “0” (Yes in Step S1), the determination unit 122 proceeds to the process of Step S2, and when this value is “1” (No in Step S1). Determines that the playlist that is currently being played is not a main part that does not hinder Java even if it is activated, and proceeds to step S6.

  In step 2, the determination unit 122 confirms “UO_permission_table” of the playlist file. In a playlist that enjoys video and audio as in the main part of a movie, it is common that user operations such as stop, pause, fast forward, fast reverse, skip up, and skip down can be performed. The determination unit 122 refers to the “UO_permission_table” of the playlist that is currently being played, and the values of “skip_up”, “skip_down”, “stop”, “pause_on”, “forward_play”, and “backward_play” are all 0. If it is (permitted) (Yes in step S2), the process proceeds to step S3. If any value is "1" (No in step S2), the currently playing play It is determined that the list is not a main part that does not cause any trouble even if Java is not activated, and the process proceeds to step S6.

  In step S3, the determination unit 122 confirms the value of “still_play” in the playlist file. When a playlist in which a plurality of streams are connected is the main part of a movie, playback does not enter a still state at the end of the stream, and playback is seamlessly transferred to the next stream. When the value of “still_play” is “0” (Yes in Step S3), the determination unit 122 proceeds to the process of Step S4, and when this value is “1” (No in Step S3). Determines that the main part does not cause any trouble even if Java is not activated, and the process proceeds to step S6.

  In step S4, the determination unit 122 confirms the playback time of the playlist stream. The reproduction time is a difference between “in_time” and “out_time” of each stream. In the case of the main part of a movie, the playback time is not set to several seconds and has a certain playback time. The determination unit 122 confirms whether or not the playback time of the stream is longer than the predetermined time. If the playback time is longer than the predetermined time (Yse in step S4), the process proceeds to step S5, and is not longer than the predetermined time. If (No in step S4), it is determined that the main part does not cause any trouble even if Java is not activated, and the process proceeds to step S6. The predetermined time here has a certain range and is not a value determined by pinpoint. In the present embodiment, the predetermined time is 1 minute, but a value between several tens of seconds to several minutes can be taken.

  In step S5, the determination unit 122 determines from the determination results in steps S1 to S4 that the stream currently being played is a main part that does not hinder even if Java is activated, and stores it in the storage unit 130. The determination result (resume_enable = 1) is held. On the other hand, if it is determined in step S1 to step S4 that it is not the main part, the determination unit 122 proceeds to step S6 and holds the determination result (resume_enable = 0) in the storage unit 130.

  In the flowchart illustrated in FIG. 13, the determination unit 122 determines that the value of “playback_type” is “0”, all the predetermined values included in “UO_permission_table” are “0”, and the value of “still_play” is “0”. When the stream playback time is longer than the predetermined time, “resume_enable = 1” is held as the determination result. For example, at least one of these is satisfied For example, “resume_enable = 1” may be held as a determination result.

  FIG. 14 is a flowchart showing a process of stopping and restarting playback in the video information playback apparatus according to the present embodiment. In step S10, when an instruction to stop playback is input by a user operation via the input unit 140, in step S11, the playback control unit 121 displays “title_id”, playlist file name, stream file currently being played back. Each piece of information necessary for resuming the reproduction, such as the name, the reproduction time, the packet ID of the selected audio information, and the packet ID of the selected caption information, is held in the storage unit 130, and the reproduction is stopped. The determination unit 122 determines whether or not the content being played back is a content that does not hinder even when Java is activated, and stores the determination result (resume_enable) in accordance with the flowchart of FIG. To hold.

  In step S 12, when an instruction to resume playback is input from the user via the input unit 140, the playback control unit 121 reads a “Movie.title” file from the optical disc 101 and stores it in the storage unit 130 in step S 13. It is determined whether the played title is a title of content whose playback can be controlled by a program operating on the Java virtual machine.

  In step S13, when the playback control unit 121 determines that the title is a content whose playback is not controlled by a program operating on the Java virtual machine (not using the Java virtual machine) (No in step S13), Proceeding to the process of S16, if it is determined that the title of the content is to be controlled by a program operating on the Java virtual machine (using the Java virtual machine) (Yes in step S13), the process of step S14 Proceed to

  In step S <b> 14, the playback control unit 121 determines whether the value of “resume_enable” held in the storage unit 130 is “1”. If the reproduction control unit 121 determines that the value of “resume_enable” is “0” (No in step S14), the playback control unit 121 proceeds to the process of step S15, and the value of “resume_enable” is “1”. (Yes in step S14), the process proceeds to step S16.

  In step S15, the playback control unit 121 does not perform resume playback, but performs playback from the beginning of the optical disc 101 in the same sequence as when the optical disc 101 was trained, for example.

  On the other hand, in step S16, the playback control unit 121 performs resume playback in the same procedure as in the case of content titles that are not controlled for playback by a program operating on the Java virtual machine (not using the Java virtual machine). For example, the playback control unit 121 searches the clip file for the position of the beginning of the GOP that is closest to the stop time from “index_info ()”, and performs data from the middle of the stream file indicated by “relative_byte” of the target GOP. Is read. Then, the playback control unit 121 causes the demultiplexer 112 to separate caption information, video information, and audio information from the read data according to the packet ID held in the storage unit 130. The information separated by the demultiplexer 112 is sent to the caption decoder 113, the video decoder 114, and the audio decoder 115, respectively, and reproduced.

  FIGS. 15A to 15C are schematic diagrams for explaining a playback stop position and a playback restart position in video information playback apparatus 100 according to the present embodiment. As in FIG. 12, the video of the content played here is a panel on which numbers “1” to “30” are written at intervals of 1 second from the start of playback based on one playlist file. When the reproduction of the video stored in the stream file indicated in the playlist is completed, the application is terminated. Here, as shown in FIG. 15A, it is assumed that the playback is stopped when the image of the panel “15” is displayed. In the present embodiment, when the content of “resume_enable” is “0”, control by a program operating on the Java virtual machine is required when playback is resumed. As shown, a program running on the Java virtual machine is started, and reproduction is resumed from the image of the panel “1” that is the top of the content (or the top of the optical disk, etc.). On the other hand, when playback is resumed, if the content of the “resume_enable” value is “1”, control by a program operating on the Java virtual machine is not necessarily required, and as shown in FIG. , The program running on the Java virtual machine is not started, and playback is resumed from the image of the panel “15” that is the content playback stop position (here, the image of the panel “15” is displayed) (It is displayed from the image of the next panel “16”).

  As described above, according to the video information reproducing apparatus 100 according to the present embodiment, the value of “playback_type”, the value of information included in “UO_permission_table”, and the “still_play” in the playlist file. It can be determined from the value and the playback time of the stream whether or not the content has no problem even if the Java program is not activated. For this reason, the video information playback apparatus 100 according to the present embodiment can reduce the waiting time until resume playback is started when playing back the main part of a movie or the like.

  100: Video information playback device, 110: Playback unit, 111: Drive, 112: Demultiplexer, 113: Subtitle decoder, 114: Video decoder, 115: Audio decoder, 116: Graphics superimposing unit, 120: Control unit, 121: Playback control unit 122: Determination unit 130: Storage unit 140: Input unit 101: Optical disc

Claims (16)

From a recording medium on which a program that operates on a virtual machine, a virtual machine use type content that can control video reproduction by the program, and a playlist file that includes reproduction control information of the virtual machine use type content are recorded, A playback unit for performing a process of playing back the video;
A video information playback method performed by a video information playback device comprising a control unit,
Whether the control unit is the first type of content in which the virtual machine utilization type content can be played back when the program is activated and when the program is not activated, A determination process for determining from the playback control information whether the content is a second type of content that can be played back only when the program is running;
When the playback of the video of the virtual machine usage type content is stopped and the playback of the video is resumed, the control unit determines that the virtual machine usage type content is the first type content in the determination process. A playback restarting process in which the playback unit restarts playback of the video from a position where playback of the video is stopped without starting the program. Information reproduction method. In the reproduction restart process, the control unit activates the program and causes the reproduction unit to start the program if the virtual machine usage type content is determined to be the second type content in the determination process. The video information playback method according to claim 1, wherein the playback of the video is resumed from a predetermined position different from the position where the playback of the video is stopped. The video information reproduction method according to claim 2, wherein the predetermined position is a head position of information stored in the recording medium or a head position of the virtual machine utilization type content. The reproduction control information includes sequential information indicating whether or not to sequentially reproduce the video of the virtual machine usage type content,
In the determination process, when the sequential information indicates that the video of the virtual machine usage type content is sequentially played back, the virtual machine usage type content is the first type of content. And when the sequential information indicates that the video of the virtual machine usage type content is not sequentially played back, it is determined that the virtual machine usage type content is the second type of content. The video information reproducing method according to any one of claims 1 to 3. The playback control information includes operation information indicating whether a specific user operation is permitted during playback of the video of the virtual machine usage type content,
In the determination process, when the operation information indicates that a specific user operation is permitted during reproduction of the video of the virtual machine usage type content, the control unit uses the virtual machine usage type content as the first. When it is determined that the content is a type of content, and the operation information indicates that a specific user operation is not permitted during playback of the video of the virtual machine usage type content, the virtual machine usage type content is the second type. The video information reproducing method according to any one of claims 1 to 3, wherein the content is determined to be the content of the video. The playback control information includes still information indicating whether or not to perform a still operation at a specific location during the playback of the video of the virtual machine usage type content,
In the determination process, when the still information indicates that the still operation is not performed at a specific location during the reproduction of the video of the virtual machine usage type content, the control unit uses the virtual machine usage type content. If it is determined that the content is the first type of content, and the still information indicates that a still operation is to be performed at a specific location during the reproduction of the video of the virtual machine usage type content, the virtual machine usage type content is The video information reproducing method according to any one of claims 1 to 3, wherein the content is determined to be a second type of content. The playback control information includes playback time information indicating the playback time of the video of the virtual machine usage type content,
In the determination process, when the total reproduction time calculated based on the reproduction time information is longer than a predetermined time in the determination process, the virtual machine usage type content is the first type content. If the total playback time calculated based on the playback time information is equal to or less than a predetermined time, it is determined that the virtual machine usage type content is the second type content. The video information reproducing method according to claim 1, wherein the video information reproducing method is a video information reproducing method. The playback control information includes sequential information indicating whether or not the video of the virtual machine usage type content is to be played back sequentially, whether or not a specific user operation is permitted during playback of the video of the virtual machine usage type content. Operation information indicating, still information indicating whether or not to perform a still operation at a specific location during playback of the virtual machine-based content video, and playback time indicating the playback time of the virtual machine-based content video Contains any two or more of the information,
In the determination process, when the sequential information indicates that the video of the virtual machine usage type content is not sequentially played back, the operation information is being reproduced during playback of the video of the virtual machine usage type content. When indicating that a specific user operation is not permitted, when the still information indicates that a still operation is to be performed at a specific location during playback of the video of the virtual machine usage type content, and based on the playback time information When the total playback time calculated in the above satisfies one or more of the cases where the total playback time is equal to or less than a predetermined time, the virtual machine utilization type content is determined to be the second type content, and based on these information, If the virtual machine usage type content is not determined to be the second type of content, the virtual machine usage type Video information playback method according to any one of claims 1 to 3, characterized in that the content is determined to be a first type of content. From a recording medium on which a program that operates on a virtual machine, a virtual machine use type content that can control video reproduction by the program, and a playlist file that includes reproduction control information of the virtual machine use type content are recorded, A playback unit for performing a process of playing back the video;
The virtual machine utilization type content is the first type of content that can play back video both when the program is activated and when the program is not activated, or the program is activated A determination unit that determines from the playback control information whether the content is a second type of content that can be played back only when
When playback of the video of the virtual machine usage type content is stopped and when the playback of the video is resumed, the determination unit determines that the virtual machine usage type content is the first type of content The video information reproducing apparatus comprises: a reproduction control unit that causes the reproduction unit to resume reproduction of the video from a position where reproduction of the video is stopped without starting the program. When the determination unit determines that the virtual machine usage type content is the second type content, the reproduction control unit activates the program and causes the reproduction unit to display the video. The video information reproducing apparatus according to claim 9, wherein the reproduction of the video is resumed from a predetermined position different from the position where the reproduction is stopped. The video information reproducing apparatus according to claim 10, wherein the predetermined position is a head position of information stored in the recording medium or a head position of the virtual machine utilization type content. The reproduction control information includes sequential information indicating whether or not to sequentially reproduce the video of the virtual machine usage type content,
The determination unit determines that the virtual machine usage-type content is the first type of content when the sequential information indicates that the video of the virtual machine usage-type content is played back sequentially. 12. The information is determined to be the second type of content when the information indicates that the video of the virtual machine usage type content is not sequentially played back. The video information reproducing device according to any one of the above. The playback control information includes operation information indicating whether a specific user operation is permitted during playback of the video of the virtual machine usage type content,
When the operation information indicates that a specific user operation is permitted during reproduction of the video of the virtual machine usage type content, the virtual machine usage type content is the first type of content. If the operation information indicates that a specific user operation is not permitted during playback of the video of the virtual machine usage type content, the virtual machine usage type content is the second type of content. The video information reproducing apparatus according to claim 9, wherein the video information reproducing apparatus is determined. The playback control information includes still information indicating whether or not to perform a still operation at a specific location during the playback of the video of the virtual machine usage type content,
When the still information indicates that the still operation is not performed at a specific location during the reproduction of the video of the virtual machine usage type content, the virtual machine usage type content is the first type of content. If the still information indicates that a still operation is to be performed at a specific location during the reproduction of the video of the virtual machine use type content, the virtual machine use type content is the second type of content. The video information reproducing apparatus according to any one of claims 9 to 12, wherein the video information reproducing apparatus is determined as follows. The playback control information includes playback time information indicating the playback time of the video of the virtual machine usage type content,
The determination unit determines that the virtual machine usage type content is the first type content when the total playback time calculated based on the playback time information is longer than a predetermined time, The virtual machine utilization type content is determined to be the second type content when the total reproduction time calculated based on the reproduction time information is equal to or less than a predetermined time. The video information reproducing device according to any one of 9 to 12. The playback control information includes sequential information indicating whether or not the video of the virtual machine usage type content is to be played back sequentially, whether or not a specific user operation is permitted during playback of the video of the virtual machine usage type content. Operation information indicating, still information indicating whether or not to perform a still operation at a specific location during playback of the virtual machine-based content video, and playback time indicating the playback time of the virtual machine-based content video Contains any two or more of the information,
When the sequential information indicates that the video of the virtual machine usage type content is not played back sequentially, the operation information indicates a specific user operation during playback of the video of the virtual machine usage type content. When indicating that it is not permitted, when the still information indicates that a still operation is to be performed at a specific location during the playback of the video of the virtual machine utilization type content, and the total calculated based on the playback time information When the reproduction time satisfies one or more of cases where the reproduction time is equal to or less than a predetermined time, it is determined that the virtual machine usage type content is the second type of content, and based on these pieces of information, the virtual machine usage type If it is not determined that the content is the second type of content, the virtual machine utilization type content is the first type Video information reproducing apparatus according to any one of claims 9, wherein determining that a content 12.

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