JP3978166B2 - Video playback apparatus and video playback method - Google Patents

Description

  The present invention relates to a video playback apparatus and video playback method, and in particular, sets a representative image (thumbnail image) for each title or chapter, displays it on a menu screen, and displays content corresponding to the selected thumbnail image. It is suitable for use in a video playback apparatus and video playback method having a playback function.

  Conventionally, a DVD (Digital Versatile Disk) capable of recording information with high density has been widespread, and there is a DVD video disk as a video information and audio information recorded on the DVD. On this DVD video disc, a main picture (main picture) such as a main part of a movie or a main part of a drama, sub-pictures (sub-pictures) as subtitles thereof, audio thereof, and the like are recorded.

  When reproducing such a DVD video disc, the DVD video reproducing device reproduces the volume structure information recorded on the DVD video disc, and reproduces the file structure information based on the reproduced volume structure information. The file structure information includes information such as a recording start position (start address) on the disk of each file constituting the content information.

  Then, the DVD-Video playback device starts playback of the DVD-Video disc according to the playback procedure specified in advance in the file structure information. At this time, if the information on the menu screen capable of selecting a desired item from a plurality of reproducible items is recorded on the DVD video disc, the DVD video playback device displays the menu screen and displays the DVD video disc. Stop playback temporarily.

  The user (user) selects a desired item from a plurality of items on the menu screen displayed on the display device. The DVD video playback device plays back content information such as video information and audio information corresponding to the selected item.

  A DVD video disc has at least one title, and this title is divided by one or more chapters. One chapter is composed of one piece of content information. The items of the menu screen described above include text that indicates the contents of titles and chapters and a representative image that indicates the contents of titles and chapters as thumbnail images. Note that text and thumbnail images indicating the contents of titles and chapters are included in the content information constituting the titles and chapters.

  Incidentally, there is a DVD-VR standard for recording content information in real time on a recording medium such as a DVD-RAM or a DVD-RW. According to this standard, a user can designate an arbitrary image in a title or chapter as a thumbnail image. As a result, during playback, thumbnail images of titles and chapters are displayed on the menu screen displayed on the display device. The user can select a desired title and chapter while viewing the displayed thumbnail image.

  Conventionally, in a video playback apparatus that plays back such a recording medium, a menu screen is displayed automatically or manually when the recording medium is played back. Then, the user has reproduced desired content information by performing an operation of selecting a desired thumbnail image on the menu screen. Therefore, if there is no operation from the user while the menu screen is displayed, the menu screen remains displayed.

In addition, when reproducing a recording medium that can display a menu screen, a reproducing apparatus that automatically reproduces by selecting the largest amount of data from the content information recorded in the recording medium is known. (Patent Document 1). Further, when a predetermined time elapses while the menu screen is displayed, a video playback apparatus that plays back the content information corresponding to the place where the cursor for selecting the content information is placed on the menu screen It has been known.
JP 2002-56654 A

  However, in the video playback apparatus described above, the content information to be played is determined by the data amount of the content information and the position of the thumbnail image on the menu screen, so the possibility that the content information desired by the user will be played is reduced. There was a problem.

  The present invention has been made to solve such a problem, and selects content information that a user desires from a recording medium capable of displaying a menu screen from which titles and chapters can be selected. The purpose is to enable automatic playback.

  In order to solve the above-described problem, in the present invention, when a menu screen including a plurality of selection items is displayed and content information is reproduced by selecting any item from these selection items, When there is no selection for a predetermined time, the number of thumbnail images included in the content information corresponding to each of the plurality of selection items is calculated, and the content information having the largest number of thumbnail images is reproduced.

  In addition, when a menu screen including a plurality of selection items is displayed and content information is reproduced by selecting one of these selection items, a plurality of selections are made when there is no item selection for a predetermined time. The number of thumbnail images included in the content information corresponding to each item is calculated, and the content information with the smallest number of thumbnail images is reproduced.

  According to the present invention configured as described above, in a video playback device that displays a menu screen in which, for example, a title or a chapter can be selected as a selection item, when an operation is not performed while the menu screen is displayed, Since the selection items to be played are determined according to the number of thumbnail images and chapters in the selection items, it is possible to select and automatically play the content information that the user thinks desired, and the user can select from the menu screen Eliminates the need to perform operations.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 3 is a block diagram showing the configuration of the video playback apparatus according to the present embodiment. In this embodiment, a DVD video playback apparatus is used.

  In FIG. 3, reference numeral 10 denotes a DVD video disk loaded in the apparatus, and 11 denotes a spindle motor that rotates the DVD video disk 10. An optical pickup 12 irradiates the DVD video disk 10 with laser light, and reads data recorded on the DVD video disk 10 by the reflected light. Then, a reproduction RF signal corresponding to the read data is obtained.

  A feed motor 13 moves a sled (not shown) on which the optical pickup 12 is mounted in the radial direction of the DVD video disk 10 to determine a reproduction position. A servo control unit 14 performs rotation control of the spindle motor 11, tracking control and focus control of the optical pickup 12, and drive control of the feed motor 13 in accordance with a control signal supplied from a system controller 30 described later.

  Reference numeral 15 denotes an RF amplifier, which amplifies the RF signal output from the optical pickup 12 and transmits it to the next stage. The RF amplifier also separates focus search and tracking control signals (signals for correcting deviations in the direction perpendicular to and parallel to the DVD video disk 10 with respect to the focal position of the laser beam) from the RF signal, Is sent to the servo control unit 14. The servo control unit 14 is configured to accurately reproduce data by servo-controlling the focal position of the laser beam in the vertical direction and the parallel direction based on these control signals.

  Reference numeral 16 denotes a digital signal processing unit which digitally processes the RF signal amplified by the RF amplifier 15 and separates a part of the control signal. The separated control signal is sent to the servo controller 14 and a system controller 30 described later. Reference numeral 17 denotes a RAM which temporarily stores data obtained in the process of signal processing performed by the digital signal processing unit 16 and data obtained as a result of the processing.

  Reference numeral 18 denotes a stream separation unit, which separates the signal output from the digital signal processing unit 16 into an audio bit stream, a main picture bit stream, and a sub-picture bit stream. Here, the main picture bitstream is a signal compressed in accordance with the MPEG2 format, and includes video information. The sub-picture bitstream is a signal compressed according to the run-length compression method, and includes subtitle information.

  An audio decoder 19 decodes the audio bit stream separated by the stream separation unit 18 and outputs a digital audio signal. The audio decoder 19 performs a decoding process according to the type of audio signal (linear PCM, AC-3, MPEG audio, etc.). Reference numeral 20 denotes a RAM, which temporarily stores data obtained during the decoding process performed by the audio decoder 19 and data obtained as a result of the process.

  A D / A converter 21 converts the digital audio signal output from the audio decoder 19 into an analog audio signal. The analog audio signal output from the D / A converter 21 is output from a speaker (not shown) via a power amplifier (not shown).

  A video decoder 22 decodes the main picture bit stream separated by the stream separation unit 18. Reference numeral 23 denotes a RAM which temporarily stores data obtained during the decoding process performed by the video decoder 22 and data obtained as a result of the process.

  A sub-picture decoder 24 decodes the sub-picture bit stream separated by the stream separation unit 18. Reference numeral 25 denotes a RAM, which temporarily stores data obtained during the decoding process performed by the sub-picture decoder 24 and data obtained as a result of the process.

  A video processor 26 digitally synthesizes the main picture output from the video decoder 22 and the sub-picture output from the sub-picture decoder 24. A video encoder 27 converts a digital image signal output from the video processor 26 into an analog image signal. The image signal output from the video encoder 27 is sent to a display device (not shown) such as a CRT (Cathode-Ray Tube) or a liquid crystal panel, whereby an image is displayed on the display device.

  An operation unit 28 is provided with various operation buttons and can perform various operations such as reproduction, stop, fast forward, and volume setting. This operation unit 28 is initially displayed on the DVD-Video playback device for the audio / subtitle information desired by the user, or instructed to change the setting of the audio / subtitle information in response to an inquiry from the DVD-Video playback device. It can also be used to make selections by moving the cursor in the menu screen.

  It should be noted that by setting an editing function in the DVD video playback apparatus of this embodiment or preparing a separate DVD video recording apparatus, settings are made for selection items such as titles and chapters recorded on the DVD video disk 10. be able to. For example, when the DVD video playback apparatus of this embodiment is equipped with an editing function, a thumbnail image can be set for a selection item such as a title or chapter by the operation button 28. At this time, a plurality of thumbnail images can be set in one chapter. Note that any one of the thumbnail images in the chapter included in the title can be selected as the thumbnail image of the title.

  Based on the signal from the operation unit 28, the signal from the digital signal processing unit 16, and the signal from the stream separation unit 18, the system controller 30 performs the servo control unit 14, the digital signal processing unit 16, the stream separation unit 18, and the video processor. 26 is controlled. Reference numeral 31 denotes a RAM which temporarily stores data obtained in the course of processing performed by the system controller 30 and data obtained as a result of the processing.

  Next, the main part structure of the system controller 30 is demonstrated based on FIG. FIG. 1 is a functional block diagram showing the main configuration of the system controller 30 according to the first embodiment. As shown in FIG. 1, the system controller 30 according to the first embodiment includes a thumbnail image number calculation unit 1, a user operation management unit 2, a navigation unit 3, and a playback engine unit 4.

  The thumbnail image number calculation unit 1 calculates the number of thumbnail images that the content information recorded on the DVD video disc 10 has. The user operation management unit 2 manages whether or not the user is operating the operation unit 28. When the user operation management unit 2 notifies that the operation unit 28 has not been operated for a predetermined time, the navigation unit 3 issues a reproduction instruction according to the number of thumbnail images calculated by the thumbnail image number calculation unit 1. The reproduction engine unit 4 reproduces the content information selected by the instruction from the navigation unit 3.

  Each functional configuration of the system controller 30 described above will be described in a little more detail. When a plurality of selection items (text, thumbnail images, etc.) representing chapters are displayed on the menu screen, the thumbnail image number calculation unit 1 calculates the number of thumbnail images included in the content information of each chapter for each chapter. When a plurality of selection items (text, thumbnail images, etc.) representing titles are displayed on the menu screen, the number of thumbnail images included in the content information of each title is calculated for each title. Here, the number of thumbnail images belonging to one title is the total number of thumbnail images possessed by one or more chapters included in the title.

  The user operation management unit 2 detects that the operation unit 28 has not been operated for a predetermined time. When the navigation unit 3 receives a notification from the user operation management unit 2 that the operation unit 28 has not been operated for a predetermined time, the navigation unit 3 corresponds to a predetermined chapter or a predetermined title according to the calculation result of the thumbnail image number calculation unit 1. A content information reproduction instruction is sent to the reproduction engine unit 4. The reproduction engine unit 4 causes the servo control unit 14, the digital signal processing unit 16, the stream separation unit 18, the video processor 26, and the like to reproduce content information in accordance with a reproduction instruction from the navigation unit 3.

  The chapter or title that the navigation unit 3 instructs to reproduce according to the calculation result of the thumbnail image number calculation unit 1 can be the one with the largest number of thumbnail images or the smallest number of thumbnail images. The reason for automatically reproducing the image with the largest number of thumbnail images is that when the user records the content information on the DVD video disc 10, the number of thumbnail images is selected for the favorite content information or important content information. This is because it is considered that there are many settings.

  Also, the reason why the thumbnail image having the smallest number of images is automatically reproduced is that when the user records content information on the DVD video disc 10, thumbnail images are set for unviewed content information. This is because it is thought that there are many cases. In this way, the DVD video playback apparatus may be able to switch between playing back the one with the largest number of thumbnail images or the one with the smallest number of thumbnail images, or adopt only one of them. Also good.

  When there are two or more pieces of content information with the same number of thumbnail images, secondary content information to be automatically reproduced is determined by the amount of content information data, content information recording time, content information arrangement method, etc. Also good. For example, it is possible to automatically reproduce content information having the largest data amount, content information having the longest recording time, and content information recorded first or later. Further, when any title is selected, the setting may be such that the one with the largest number of chapters is automatically reproduced or the one with the smallest number of chapters is automatically reproduced. Furthermore, when there are two or more pieces of content information having the same number of thumbnail images, the same number of pieces of content information having the same number of thumbnail images may be reproduced in order.

  In this embodiment, only the image with the largest number of thumbnail images or the image with the smallest number of thumbnail images is automatically reproduced. However, the image with the largest number of thumbnail images is reproduced in order, or the number of thumbnail images is reduced. It is good also as a setting which reproduces in order from the fewest.

  Note that the use of thumbnail images as selection items on the menu screen makes it easier to grasp the contents of titles and chapters, but the number of thumbnail images that can be displayed on one screen is limited. In this case, content information that is a candidate for automatic playback may be selected only from those displayed on the menu screen as titles, but all titles recorded on the recording medium that are not displayed on the menu screen You may choose from. In addition, when a chapter of a certain title is displayed on the menu screen, the content information that is a candidate for automatic playback may be selected from the chapters displayed on the menu screen, but is not displayed on the menu screen. You may select from all the chapters which belong to the said title.

  Next, the reproduction operation of this embodiment will be described with reference to FIG. Here, an operation when a chapter is displayed on the menu screen is shown. In this embodiment, when only one title is recorded on the DVD video disc 10, when the DVD video disc 10 is inserted into the DVD video playback device, the chapters in the title are displayed as thumbnail images on the menu screen. It is trying to display. Alternatively, in the present embodiment, when a plurality of titles are recorded on the DVD video disc 10, the user operates the operation button 28 to select a desired title from the plurality of titles. The chapters inside are displayed as thumbnail images on the menu screen.

  First, in a state in which the chapter thumbnail image is displayed on the menu screen, the user operation management unit 2 detects whether or not the operation unit 28 has been operated for a predetermined time (step S1). If there is any operation (No in step S1), the user operation management unit 2 notifies the navigation unit 3 of the operation content, and the navigation unit 3 issues a reproduction instruction to the reproduction engine unit 4 accordingly. Thus, the process designated by the user by the actual operation is performed (step S2). On the other hand, when there is no operation by the user for a predetermined time (Yes in step S1), the user operation management unit 2 notifies the navigation unit 3 of this (step S3).

  When the notification of no operation for a predetermined time is received, the navigation unit 3 checks whether there are a plurality of selectable chapters (step S4). If there is only one selectable chapter (No in step S4), the navigation unit 3 selects content information corresponding to the chapter (step S5), and issues a playback instruction for the content information to the playback engine unit. 4 is performed to reproduce the selected content information (step S6).

  On the other hand, when there are a plurality of selectable chapters (Yes in step S4), analysis of each chapter is started. First, the thumbnail image number calculation unit 1 calculates the number of thumbnail images included in each chapter for each chapter (step S7). Then, the analysis result of each chapter is stored in the RAM 31 (step S8). Further, the navigation unit 3 compares the number of thumbnails of each chapter (step S9).

  The navigation unit 3 determines a chapter to be automatically reproduced based on the comparison result. At that time, it is assumed that the chapter to be reproduced has the largest number of thumbnail images or the smallest number of thumbnail images (step S10). Then, the navigation unit 3 selects content information corresponding to the determined chapter (step S5), and gives a reproduction instruction for the content information to the reproduction engine unit 4 to reproduce the selected content information (step S6). ).

  Next, a reproduction operation when a thumbnail image of a title is displayed on the menu screen will be described with reference to FIG. In the present embodiment, when the DVD video disc 10 is inserted into the DVD video playback device, the title is displayed as a thumbnail image on the menu screen.

  First, the user operation management unit 2 detects whether or not the operation unit 28 has been operated for a predetermined time while the thumbnail image of the title is displayed on the menu screen (step S11). If there is any operation (No in step S11), the user operation management unit 2 notifies the navigation unit 3 of the operation content, and the navigation unit 3 issues a reproduction instruction to the reproduction engine unit 4 accordingly. Thus, the process designated by the user by the actual operation is performed (step S12). On the other hand, when there is no operation by the user for a predetermined time (Yes in step S11), the user operation management unit 2 notifies the navigation unit 3 of this (step S13).

  When the notification of no operation for a predetermined time is received, the navigation unit 3 checks whether there are a plurality of selectable titles (step S14). If there is only one selectable title (No in step S14), navigation unit 3 selects content information corresponding to the title (step S15), and issues a playback instruction for the content information to playback engine unit. 4 is performed to reproduce the selected content information (step S16).

  On the other hand, when there are a plurality of selectable titles (Yes in step S14), analysis of each title is started. First, the thumbnail image number calculation unit 1 calculates the number of thumbnails of one chapter included in one title (step S17), and stores the analysis result in the RAM 31 (step S18).

  Here, the thumbnail image number calculation unit 1 checks whether analysis of all chapters included in one title has been completed (step S19). If not completed (No in step S19), the number of thumbnails of the next chapter is calculated in step S17, and the analysis result is stored in the RAM 31 in step S18.

  On the other hand, when the analysis of all the chapters included in one title is completed (Yes in step S18), the thumbnail image number calculating unit 1 sums up the number of thumbnails of all the chapters included in the title ( Step S20). Then, the analysis result is stored in the RAM 31 as a title analysis result (step S21).

  Next, the thumbnail image number calculation unit 1 checks whether the analysis of all titles has been completed (step S22), and if not completed (No in step S22), moves to analysis of the next title. Then, the processes from step S17 to step S21 described above are repeated. On the other hand, when the analysis of all titles is completed (Yes in step S22), the analysis results of the respective titles are compared in the navigation unit 3 (step S23).

  The navigation unit 3 determines a title to be automatically reproduced based on the comparison result. At that time, it is assumed that the title to be reproduced has the largest number of thumbnail images or the smallest number of thumbnail images (step S24). Then, the navigation unit 3 selects content information corresponding to the determined title (step S15), and gives a playback instruction for the content information to the playback engine unit 4, thereby reproducing the selected content information (step S16). ).

  For example, when a DVD video disc 10 is loaded in the video playback apparatus of the present embodiment, three titles of title 1, title 2, and title 3 are displayed on the menu screen so as to be selectable by thumbnail images, character information, etc. It is assumed that a predetermined time has passed without any operation. In this case, since there are a plurality of selectable titles, the thumbnail image number calculation unit 1 checks the number of thumbnail images of each title. As a result, as shown in FIG. 7, the number of thumbnail images included in title 1 is 2, the number of thumbnail images included in title 2 is 10, and the number of thumbnail images included in title 3 is 0. Suppose that

  In this case, when the title having the largest number of thumbnail images is set to be automatically reproduced, the content information corresponding to the title 2 is automatically reproduced. When the title having the smallest number of thumbnail images is set to be automatically reproduced, the content information corresponding to the title 3 is automatically reproduced.

  Next, a configuration of main parts of the system controller 30 according to the second embodiment will be described with reference to FIG. FIG. 2 is a functional block diagram showing a main configuration of the system controller 30 according to the second embodiment. As shown in FIG. 2, the system controller 30 according to the second embodiment includes a chapter number calculation unit 5, a user operation management unit 2, a navigation unit 3, and a playback engine unit 4.

  The chapter number calculation unit 5 calculates the number of chapters included in the title recorded on the DVD video disc 10. The user operation management unit 2 manages whether or not the user is operating the operation unit 28. When the navigation unit 3 is notified by the user operation management unit 2 that the operation unit 28 has not been operated for a predetermined time, the navigation unit 3 issues a reproduction instruction according to the number of chapters calculated by the chapter number calculation unit 5. The reproduction engine unit 4 reproduces the content information corresponding to the title selected by the instruction from the navigation unit 3.

  Each functional configuration of the system controller 30 described above will be described in a little more detail. The chapter number calculation unit 5 calculates the number of chapters of each title for each title when a plurality of selection items (such as text and thumbnail images) representing the title are displayed on the menu screen. The user operation management unit 2 detects that the operation unit 28 has not been operated for a predetermined time. When the navigation unit 3 receives a notification from the user operation management unit 2 that the operation unit 28 has not been operated for a predetermined time, the navigation unit 3 instructs to reproduce content information corresponding to a predetermined title according to the calculation result of the chapter number calculation unit 5. Is sent to the playback engine unit 4. The reproduction engine unit 4 causes the servo control unit 14, the digital signal processing unit 16, the stream separation unit 18, the video processor 26, and the like to reproduce content information in accordance with a reproduction instruction from the navigation unit 3.

  The title that the navigation unit 3 instructs to play according to the calculation result of the chapter number calculation unit 5 can be the one with the largest number of chapters or the smallest number of chapters. The reason for automatically reproducing the chapter with the largest number of chapters is that when the user records content information on the DVD-Video disc 10, a large number of chapters are set for favorite content information or important content information. This is because it is thought that there are many.

  Also, the reason for automatically reproducing the one with the smallest number of chapters is that when the user records content information on the DVD video disc 10, no chapter is set for an unviewed title. It is because it is thought that there are many. In this way, whether to play the title with the largest number of chapters or the title with the smallest number of chapters may be switched by the DVD video playback device, or only one of them may be adopted. .

  If there are two or more titles with the same number of chapters, the content information to be automatically reproduced may be determined secondarily depending on the data amount of the content information, the recording time of the content information, how the content information is arranged, and the like. For example, it is possible to automatically reproduce the content information with the largest amount of data, the content information with the longest recording time, and the content information recorded first or last. Further, when any title is selected, a setting may be made such that an image having a large number of thumbnail images is automatically reproduced or an image having the smallest number of thumbnail images is automatically reproduced. Furthermore, when there are two or more pieces of content information having the same number of thumbnail images, the same number of pieces of content information having the same number of thumbnail images may be reproduced in order.

  In this embodiment, only the image with the largest number of thumbnail images or the image with the smallest number of thumbnail images is automatically reproduced. However, the image with the largest number of thumbnail images is reproduced in order, or the number of thumbnail images is reduced. It is good also as a setting which reproduces in order from the fewest.

  Note that the use of thumbnail images as selection items on the menu screen makes it easy to grasp the contents of the title, but the number of thumbnail images that can be displayed on one screen is limited. In this case, content information that is a candidate for automatic playback may be selected only from those displayed on the menu screen as titles, but all titles recorded on the recording medium that are not displayed on the menu screen You may choose from.

  Next, the reproducing operation of this embodiment will be described with reference to FIG. In the present embodiment, when the DVD video disk 10 is loaded into the DVD video playback apparatus, the recorded information is displayed as a thumbnail image for each title on the menu screen.

  First, the user operation management unit 2 detects whether or not the operation unit 28 has been operated for a predetermined time while the thumbnail image of the title is displayed on the menu screen (step S31). If any operation is performed (No in step S31), the user operation management unit 2 notifies the navigation unit 3 of the operation content, and the navigation unit 3 issues a reproduction instruction to the reproduction engine unit 4 accordingly. Thus, the process designated by the user by the actual operation is performed (step S32). On the other hand, when there is no operation by the user for a predetermined time (Yes in step S31), the user operation management unit 2 notifies the navigation unit 3 of this (step S33).

  When the notification of no operation for a predetermined time is received, the navigation unit 3 checks whether there are a plurality of selectable titles (step S34). If there is only one selectable title (No in step S34), navigation unit 3 selects content information corresponding to the title (step S35), and issues a playback instruction for the content information to playback engine unit. 4 is played back (step S36).

  On the other hand, if there are a plurality of selectable titles (Yes in step S34), analysis of each title is started. First, the chapter number calculation unit 5 calculates the number of chapters included in one title (step S37). Then, the analysis result is stored in the RAM 31 (step S38).

  Here, the chapter number calculation unit 5 checks whether the analysis of all titles has been completed (step S39). If not completed (No in step S39), the number of chapters of the next title is calculated in step S37, and the analysis result is stored in the RAM 31 in step S38. On the other hand, when the analysis of all titles is completed (Yes in step S39), the navigation unit 3 compares the number of chapters included in each title (step S40).

  The navigation unit 3 determines a title to be automatically reproduced based on the comparison result. At that time, it is assumed that the title to be reproduced has the largest number of chapters or the smallest number of chapters (step S41). Then, the navigation unit 3 selects content information corresponding to the determined title (step S35), and gives the playback instruction of the content information to the playback engine unit 4 to play back the selected content information (step S16). ).

  As described above in detail, according to the present embodiment, the video playback device that displays a menu screen from which titles and chapters can be selected is used when an operation is not performed while the menu screen is displayed. Since the user can select and automatically reproduce the content information that the user desires, it is not necessary for the user to perform a selection operation on the menu screen. Further, when the recording medium can be exchanged using a changer or the like, it is possible to avoid the menu screen of the recording medium after being exchanged from being displayed.

  The above-described embodiments are merely examples of implementation in carrying out the present invention, and the technical scope of the present invention should not be interpreted in a limited manner. In other words, the present invention can be implemented in various forms without departing from the spirit or main features thereof.

  For example, the video playback apparatus according to the present invention may be a video playback apparatus using a recording medium other than a DVD.

  INDUSTRIAL APPLICABILITY The present invention is useful for a video playback device that displays a menu screen from which titles and chapters can be selected, particularly for a video playback device in an environment where a user cannot perform frequent operations such as in-vehicle use.

It is a block diagram which shows the function structure of the system controller by 1st Embodiment. It is a block diagram which shows the function structure of the system controller by 2nd Embodiment. It is a block diagram which shows the structural example of the video reproduction apparatus of this embodiment. It is a flowchart which shows an example of the reproduction | regeneration operation | movement of 1st Embodiment. It is a flowchart which shows the other example of the reproduction | regeneration operation | movement of 1st Embodiment. It is a flowchart which shows the reproduction | regeneration operation | movement of 2nd Embodiment. It is a figure which shows an example of the thumbnail image number calculation result by this embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Thumbnail image number calculation part 2 User operation management part 3 Navigation part 4 Playback engine part 5 Chapter number calculation part 10 DVD video disk 22 Video decoder 24 Sub picture decoder 26 Video processor 27 Video encoder 28 Operation part 30 System controller 31 RAM

Claims (12)

When playing back a recording medium, it has a function of displaying a menu screen including a plurality of selection items and reproducing content information corresponding to the selected item by selecting any one of the plurality of selection items. A video playback device,
A user operation management unit for managing whether or not the selection item is selected and notifying that the selection item is not selected for a predetermined time;
A thumbnail image number calculating unit for calculating the number of thumbnail images included in the content information respectively corresponding to the plurality of selection items;
A content selection unit that receives a notification from the user operation management unit and selects content information having the largest number of thumbnail images from content information corresponding to the plurality of selection items;
A reproduction control unit that performs reproduction control of the content information selected by the content selection unit;
A video playback apparatus comprising: When playing back a recording medium, it has a function of displaying a menu screen including a plurality of selection items and reproducing content information corresponding to the selected item by selecting any one of the plurality of selection items. A video playback device,
A user operation management unit for managing whether or not the selection item is selected and notifying that the selection item is not selected for a predetermined time;
A thumbnail image number calculating unit for calculating the number of thumbnail images included in the content information respectively corresponding to the plurality of selection items;
A content selection unit that receives a notification from the user operation management unit and selects content information with the smallest number of thumbnail images from content information corresponding to the plurality of selection items;
A reproduction control unit that performs reproduction control of the content information selected by the content selection unit;
A video playback apparatus comprising: The video playback apparatus according to claim 1, wherein the selection item is a chapter. The video playback apparatus according to claim 2, wherein the selection item is a chapter. The video playback apparatus according to claim 1, wherein the selection item is a title. The video playback apparatus according to claim 2, wherein the selection item is a title. A video playback method for displaying a menu screen including a plurality of selection items and reproducing content information corresponding to the selected item by selecting one of the plurality of selection items when reproducing a recording medium Because
A first step of detecting that there is no selection of the selection item for a predetermined time;
A second step of calculating the number of thumbnail images included in the content information corresponding to each of the plurality of selection items when it is detected that the selection of the selection item does not occur for a predetermined time in the first step;
A third step of comparing the number of thumbnail images of the plurality of content information calculated by the second step;
A fourth step of selecting content information having the largest number of thumbnail images from the plurality of content information compared in the third step;
A fifth step of reproducing the content information selected by the fourth step;
A video playback method comprising: A video playback method for displaying a menu screen including a plurality of selection items and reproducing content information corresponding to the selected item by selecting one of the plurality of selection items when reproducing a recording medium Because
A first step of detecting that there is no selection of the selection item for a predetermined time;
A second step of calculating the number of thumbnail images included in the content information corresponding to each of the plurality of selection items when it is detected that the selection of the selection item does not occur for a predetermined time in the first step;
A third step of comparing the number of thumbnail images of the plurality of content information calculated by the second step;
A fourth step of selecting content information with the smallest number of thumbnail images from the plurality of content information compared in the third step;
A fifth step of reproducing the content information selected by the fourth step;
A video playback method comprising: A function of displaying a menu screen including a plurality of titles as selection items when reproducing a recording medium, and reproducing content information corresponding to the selected title by selecting any one of the plurality of titles A video playback device comprising:
A user operation management unit that manages whether or not the title is selected and notifies that the title is not selected for a predetermined time;
A chapter number calculation unit for calculating the number of chapters included in the content information respectively corresponding to the plurality of titles;
A content selection unit that receives notification from the user operation management unit and selects content information having the largest number of chapters from content information corresponding to the plurality of titles;
A reproduction control unit that performs reproduction control of the content information selected by the content selection unit;
A video playback apparatus comprising: A function of displaying a menu screen including a plurality of titles as selection items when reproducing a recording medium, and reproducing content information corresponding to the selected title by selecting any one of the plurality of titles A video playback device comprising:
A user operation management unit that manages whether or not the title is selected and notifies that the title is not selected for a predetermined time;
A chapter number calculation unit for calculating the number of chapters included in the content information respectively corresponding to the plurality of titles;
A content selection unit that receives notification from the user operation management unit and selects content information with the smallest number of chapters from content information corresponding to the plurality of titles;
A reproduction control unit that performs reproduction control of the content information selected by the content selection unit;
A video playback apparatus comprising: When playing back a recording medium, a menu screen including a plurality of titles as selection items is displayed, and video playback for playing back content information corresponding to the selected title by selecting any title from the plurality of titles A method,
A first step of detecting that there is no selection of the title for a predetermined time;
A second step of calculating the number of chapters included in the content information corresponding to each of the plurality of titles when the first step detects that the selection of the title does not occur for a predetermined time;
A third step of comparing the number of chapters of the plurality of content information calculated by the second step;
A fourth step of selecting content information having the largest number of chapters from the plurality of content information compared in the third step;
A fifth step of reproducing the content information selected by the fourth step;
A video playback method comprising: When playing back a recording medium, a menu screen including a plurality of titles as selection items is displayed, and video playback for playing back content information corresponding to the selected title by selecting any title from the plurality of titles A method,
A first step of detecting that there is no selection of the title for a predetermined time;
A second step of calculating the number of chapters included in the content information corresponding to each of the plurality of titles when the first step detects that the selection of the title does not occur for a predetermined time;
A third step of comparing the number of chapters of the plurality of content information calculated by the second step;
A fourth step of selecting content information with the smallest number of chapters from the plurality of content information compared in the third step;
A fifth step of reproducing the content information selected by the fourth step;
A video playback method comprising:

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