JP2008166895A - Video display device, its control method, program and recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a video display device for displaying a list so as to accurately recognize a plurality of video contents in a short time while limiting the increase of resources for processing in the video display device for displaying the list of the video contents, its control method, a program and a recording medium. <P>SOLUTION: The video display device comprises: a display control part 103 for determining the display size of a thumbnail and the thumbnail to be displayed as a moving image; a summarization degree determination part 102 for obtaining output from the display control part 103 and determining a summarization degree from the display size of the thumbnail; and a thumbnail preparation part 106 for obtaining output from the summarization degree determination part 102, preparing the thumbnail moving image corresponding to the summarization degree and outputting it to the display control part 103. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a video display apparatus that enables a desired video content to be selected from a plurality of video contents by thumbnail display, a control method thereof, a program, and a recording medium.

  2. Description of the Related Art Conventionally, in a recorder apparatus or the like that records video content on a recording medium, in order to display a large number of video content as a list, one frame of moving image of the video content is reduced and displayed as a still image representing the video content. ing. An image representative of such video content is generally called a thumbnail. When a plurality of video contents are recorded, a plurality of thumbnails are displayed as a list on one screen, and the user can select desired video contents by this list display.

  On the other hand, the amount of video content recorded on a recording medium or accessible via a network is steadily increasing against the background of an increase in capacity of recording media and an increase in communication line speed in recent years. When the number of video contents increases in this way, if thumbnails are displayed in a predetermined size, thumbnails cannot be displayed for all video contents. Was damaged. On the other hand, techniques for improving convenience when browsing a plurality of video contents have been proposed. For example, for still image content, a technique for setting the arrangement and reduction ratio of thumbnails so that all thumbnails can be displayed based on the size of the thumbnail display area and the number of video contents is disclosed. (For example, refer to Patent Document 1).

  By the way, various shots (scenes) are included in the video content, in other words, a lot of still image content is included. When displaying thumbnails for all viewable video content, it is often difficult to grasp the content of video content if still images obtained by extracting only one frame from a moving image are displayed as thumbnails. .

  On the other hand, in displaying thumbnails of video content, if all moving images are displayed instead of still images, the amount of processing becomes enormous, and hardware such as a CPU (Central Processing Unit) and a memory for processing this is required. Will have to be strengthened. This also increases the cost for manufacturing the video display device. If the increase in hardware is reduced in order to reduce the cost, the resources that can be used are limited. Therefore, it takes a long time to grasp the outline of the video content due to a problem such as a decrease in display speed.

Thus, a technique is disclosed in which thumbnails are displayed as a still image as an initial state, and only those selected as viewing targets are displayed as moving images (see, for example, Patent Document 2).
JP 2004-012633 A JP 2003-274368 A

  However, in the technique of displaying only the selected thumbnail still image replaced with a moving image as in Patent Document 2, the visual effect is that the selected one video content is reproduced normally, although it is a thumbnail moving image. It is no different from when it is. Therefore, when a large number of video contents are displayed as a list of thumbnail still images, in order to grasp the contents of all the video contents, all the thumbnails must be selected and played back. There was a problem that it only took time to check the contents.

  The present invention has been made in order to solve the above-described problems, and its purpose is to accurately increase the contents of a large amount of video content in a short time while limiting an increase in resources for processing. The present invention provides a video display apparatus that can be grasped, a control method thereof, a program, and a recording medium.

  In view of such circumstances, the video display device according to the first invention is a video display device that displays a list of images associated with video content in a single screen, and selects video content that can be played back. A video selection unit, a display control unit that determines a display size of an image to be displayed as a list from the number of video content, and a summarization degree determination unit that determines a degree of summarization of the summary moving image from the display size, The video selection unit selects a summary moving image to be reproduced based on the degree of the summary.

  A video display device according to the second invention is a video display device that displays a list of images associated with video content in a single screen, and a video selection unit that selects video content that can be played back. A display control unit that determines a display size of an image to be displayed as a list from the number of video contents, a summarization degree determination unit that determines a degree of summarization of the summary moving image from the display size, and a reproduction based on the degree of summarization And a summary moving image creating unit for creating a summary moving image.

  In the video display device according to a third aspect of the invention, the display control unit selects a plurality of still images from among the still images displayed as a list, and the summary moving image corresponding to the still images is displayed in the still image display area. Control is performed to reproduce an image.

  According to a fourth aspect of the present invention, in the video display device, the display control unit calculates the number of the video contents that can be reproduced as the summary moving image at a time, and the images that can be reproduced at a time as the list display image. Dividing into groups of the number of contents, selecting the video content one by one from the group, and switching the display of the summary video when the playback of the summary video of the video content ends And

  The video display device according to the fifth invention is characterized in that, when the display size of the images to be displayed in a list is changed, the summarization degree determination unit again determines the degree of summarization.

  In the video display device according to a sixth aspect of the invention, the summarization degree determination unit determines the degree of summarization so that the reproduction time of the summary moving image becomes shorter as the display size of the image to be displayed in the list becomes smaller. Features.

  The video display device according to a seventh aspect of the present invention further includes a video analysis unit that analyzes the video content and creates importance level information for each section of the video data constituting the video content, and the summary video The creation unit creates a summary moving image from the summary degree and importance information.

  According to an eighth aspect of the present invention, there is provided a video display device control method for controlling a video display device that displays a list of images associated with video content in a single screen, the number of the video content being displayed in a list. Calculating the display size of the images to be displayed in a list, selecting a display object to be replaced with a summary moving image from the displayed still images, and determining a summary level of the summary moving image from the display size And a step of selecting or creating the summary moving image corresponding to the degree of the summary.

  According to a ninth aspect of the present invention, there is provided a control method for a video display device, wherein the playback time of the summary moving image is shortened as the display size of the list-displayed image is reduced.

  A program according to the present invention causes a computer to execute the control method of the video display device.

  The recording medium according to the present invention is characterized in that the program is recorded so as to be readable by a computer.

  According to the present invention composed of the technical means as described above, a thumbnail moving image (summary moving image) in which the summarization degree of the video content is changed according to the display size of the thumbnails to be displayed in a list on the screen is displayed. As a result, for example, when the number of displays is large, the thumbnail moving image is shortened and the thumbnail moving images displayed one after another are switched, so that the list can be obtained without increasing the resources such as hardware necessary for processing. The contents of a large number of video contents can be presented in the display state. Since the user can accurately grasp the outline of the video content in a short time, the user can access the desired video content in a very short time.

When the thumbnail display size is changed, the summarization level is changed accordingly, and the playback time of the thumbnail moving image is also changed. Thereby, in order to reproduce within a predetermined time according to the number of thumbnails displayed, the summary moving image can be more detailed or simplified, and the contents of the video content can be efficiently presented to the user.
Or, if the thumbnail display size is different, the larger the thumbnail display size, the higher the importance, and the smaller the display size, the lower the importance. If the display size becomes smaller, the summary moving image is reproduced in a more simplified manner when the display size becomes smaller. Therefore, the contents of the video content can be presented in accordance with the user's interest. .

  Further, since the video content is analyzed and the importance for each section of the moving image data is calculated, the thumbnail moving image can be easily created by using the information on the importance.

Before describing embodiments of the present invention, terms used in this specification will be described.
“Summary moving image” is a moving image of video content (in this case, data including digitized moving image data, audio data, additional data such as title name and genre classification, etc.) It refers to a moving image composed of a short summary of image data. The summary moving image may be a story that has a story and is shortened to such an extent that the content of the video content can be grasped, or a summary video that does not have a story and only the main scene of the video content is extracted (so-called highlight). . In addition, it is better that the summary moving image includes corresponding audio data.

  “Summary” is the degree to which the length of the moving image data of the original video content has been shortened by the summary moving image. High summarization means that the length is shorter than the original moving image.

  A “thumbnail” is an image that is displayed in a list in order to easily grasp the contents of a plurality of video contents, and is associated so that when a thumbnail is selected, the video content corresponding to the thumbnail can be selected. When one frame of moving image of the video content is displayed as a still image, it is called a “thumbnail still image”, and when it is displayed in a moving image state, it is called a “thumbnail moving image”.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Parts with the same reference numerals represent the same thing.
FIG. 1 is a block diagram illustrating a configuration example of a video display device according to an embodiment of the present invention.

  The video display apparatus 100 includes a video selection unit 101 that selects data such as video content, a summarization level determination unit 102, a display control unit 103 that determines a thumbnail display size and a thumbnail to be displayed as a moving image, video content, and the like. A recording unit 104 that records the data, a video analysis unit 105 that analyzes the video of the content, a thumbnail creation unit 106 that creates a thumbnail, and a display unit 107.

  Each unit, which is a component of the present invention, can be realized by, for example, hardware configured by a microprocessor, a memory, a bus, an interface, a peripheral device, and the like, and software executable on these hardware.

  Here, the recording unit 104 includes a recording medium for recording data and a reading device thereof. The recording medium is realized by, for example, a magnetic disk, an optical disk, a flash memory, or the like.

  The display unit 107 can be realized by a display device for displaying characters, graphics, and the like in addition to images. Moreover, you may implement | achieve by the apparatus which sends out the signal for displaying the comprised screen toward the display apparatus attached externally.

  The video selection unit 101, the summarization level determination unit 102, the display control unit 103, and the thumbnail creation unit 106 can be realized by a general-purpose microprocessor, and some of them can be realized by a DSP (Digital Signal Processor). Good. In this case, the program code of software that implements the functions of the present embodiment is executed by the microprocessor or DPS.

  With this configuration, thumbnail still images of video content are displayed as a list on the display unit 107, and the summarization level in the summary video displayed as a thumbnail video is displayed by the summarization level determination unit 102 according to the display size of the thumbnail to be displayed. Can be changed.

Next, the operation of the video display apparatus 100 will be described using the flowchart of FIG.
When the process is started, in step (S) 201, the video selection unit 101 accesses the recording unit 104 and acquires the number M of video contents to be displayed as a list (where M is a natural number). The video selection unit 101 outputs the video content number M to the display control unit 103.

  In subsequent S202, the display control unit 103 determines whether or not the video content number M is zero. If the number of video contents M is not 0 (when NO is selected in S202), the list proceeds to thumbnail display, and the process proceeds to S203. If the number of video contents M is 0 (when YES is selected in S202), there is no video content for displaying thumbnails, so the process proceeds to S206 and the process is terminated.

  In step S <b> 203, the display control unit 103 determines the thumbnail display size from the size of the thumbnail display area on the display unit 107 and the number of video contents M recorded in the recording unit 104. Here, the “thumbnail display area” refers to an area reserved for displaying thumbnails in the screen, and its size depends on the screen display method (screen layout). The thumbnail display area may be the entire screen or a part of the screen depending on the screen layout.

  FIG. 3 shows an example of the screen layout (when the thumbnail display area is a part of the screen). In the example of FIG. 3A, the layout is configured by the thumbnail display area 301 and the title name display area 302, and the display sizes of the thumbnails arranged in the thumbnail display area 301 are the same. In the example of FIG. 3B, the layout is configured by the thumbnail display area 303, the title name display area 304, and the playback area 305, and the display sizes of the thumbnails arranged in the thumbnail display area 303 are different. The display size of the thumbnail is defined as the number of pixels in the horizontal direction and the vertical direction. It may be calculated by the method described in Patent Document 1, or a lookup table (LUT) using the number of video contents M as an index for each screen layout may be prepared and determined from this LUT.

  In the storage unit 104, thumbnail still images are stored in association with video content. In S204, the video selection unit 101 determines video content to be displayed in a predetermined order, and further selects a thumbnail still image corresponding to the determined video content. The predetermined order is, for example, the order of creation of video content, file name, title name, rating, etc. (These information is given as additional information before the video content is recorded in the recording unit 104. Or added after recording). The video selection unit 101 reads the data of the selected thumbnail still image from the recording unit 104 and supplies it to the thumbnail creation unit 106. Here, when the thumbnail still image is not stored in the recording unit 104, the video selection unit 101 reads the video content from the recording unit 104 and supplies the acquired video content data to the thumbnail creation unit 106 as it is. In addition, the video selection unit 101 outputs the identification name of the video content determined at this time to the display control unit 103. The identification name is information that can specify the video content, and is, for example, a file name, a title name, an arbitrarily set identifier, or the like.

  Since the display size is not always the same for all video contents as in the example shown in FIG. 3B, the display control unit 103 selects the video for the thumbnail display size for each video content. Along with the identification name given from the unit 101, the sum is output to the summarization level determination unit 102.

  In addition, the display control unit 103 transmits information about the display size of the thumbnail still image to the thumbnail creation unit 106 together with the identification name. Further, the display control unit 103 displays information on which position on the screen (display position) should be displayed when the thumbnail still image is output to the display unit 107, information on the display size, and identification name of the video content. Store them in association with each other.

  The still image creation unit 108 of the thumbnail creation unit 106 performs a decoding process as necessary when a thumbnail still image is input. For example, if the thumbnail still image is compressed in the JPEG (Joint Photographic Experts Group) format, the still image creation unit 108 is configured to include a JPEG decoder.

  When the thumbnail creation unit 106 is input in the state of video content data instead of the thumbnail still image state, the still image creation unit 108 extracts an arbitrary frame from the video content moving image data, Generate thumbnail still images. For example, in order to extract one frame from the moving image data, a decoding process of the summary moving image creation unit 109 described later is executed. The generated thumbnail still image may be stored in the recording unit 104. At this time, if the thumbnail still image is compressed in the JPEG format, the still image creation unit 108 is configured to include a JPEG encoder.

  Thereafter, the thumbnail creation unit 106 outputs the thumbnail still image together with the identification name to the display control unit 103, and the display control unit 103 extracts information about the display position stored from the identification name, and determines in S203. A thumbnail still image is output to the display unit 107 at the display position and display size.

  When the processing so far is executed for all the video contents to be browsed, thumbnail still images of the video contents stored in the recording unit 104 are displayed in a listable state on the display unit 107.

  In S205, the display control unit 103 determines N items to be displayed as thumbnail moving images from the list of video contents displayed as thumbnail still images (where N is a positive integer, and the maximum value of N is This is the maximum number of thumbnails that can be displayed as moving images at the same time). Here, when M ≦ N (that is, the number of video contents is equal to or less than the number of thumbnails that can be simultaneously displayed as moving images), all the thumbnail still images being displayed can be replaced with thumbnail moving images (summary moving images) and reproduced. On the other hand, when M> N, all thumbnail still images cannot be replaced with thumbnail moving images and played back, so only a part is selected and displayed as a moving image.

  Here, when M> N, as a method of determining video content to be displayed as a thumbnail moving image, the displayed thumbnail still image is divided into N groups, and video content is selected one by one from each group. You may make it do. An example of group division and thumbnail moving image display order in this case is shown.

  FIG. 4 is a diagram illustrating an example of the grouping described above. In FIG. 4, 16 thumbnail still images are divided into 4 groups of 2 × 2 (an example in the case of N = 4 and M = 16).

  FIG. 5 is a diagram showing an example of the display order of thumbnail moving images when grouped as shown in FIG. In FIG. 5, the portion painted in black indicates that the thumbnail moving image is being reproduced. However, it is assumed that the length of each thumbnail moving image is the same. As shown in FIGS. 5A to 5D, one thumbnail still image is replaced with a moving image in each group and displayed.

  As the number of video contents increases, the number of thumbnails to be displayed on one screen increases, and the display size decreases accordingly. When the thumbnail display size becomes smaller, it is only necessary to grasp the outline rather than grasping the detailed contents of the video content in the list display. In view of this, a function for determining the summarization level of video content is used to generate thumbnail moving images, and processing for increasing the summarization level (short summarization) as the number of video contents increases is performed. This process will be described later. In other words, even if the number of summary moving images that can be displayed at the same time is the same, the number of thumbnails that can be displayed as moving images within a certain period of time increases. Can be obtained.

  In step S <b> 206, the display control unit 103 determines whether to end the video content list display process using thumbnails. The process ends when the video content is selected and played back, or when the operation of the apparatus is stopped, such as when the power is turned off.

  As described above, the video display device according to the present embodiment displays a summary moving image in which the summarization level of video content is changed according to the number of thumbnails displayed (or display size) as a thumbnail. As a result, for example, when the number of displays is large, the length of playback of thumbnail moving images is shortened and the display is switched one after another without increasing the resources such as hardware necessary for processing. The contents of a large number of video contents can be presented in the display state. The user can accurately grasp the outline of the video content in a short time, and can access the desired video content in a very short time.

[Thumbnail video display]
Hereinafter, the display of the thumbnail moving image (S205 shown in FIG. 2) will be described in detail. FIG. 6 is a flowchart showing an operation example of the thumbnail moving image display process for one video content. In the following description, the processing will be described as processing for one video content, but in practice, processing is executed in parallel for the N video contents determined in advance.

  When the process proceeds to S205, first, in S601, the summarization level determination unit 102 determines the summarization level for the thumbnail moving image based on the display size of the thumbnail input from the display control unit 103 together with the identification name. For the determined summary level, the control information indicating the summary length and the identification name are output to the video selection unit 101 and the thumbnail creation unit 106.

  FIG. 7 shows a correspondence example between the thumbnail display size and the summary level. Such a table is stored in the summary level determination unit 102. Here, the “summary level” is an index indicating the level of summarization (here, for example, the summary level is expressed as a rough summary, that is, the time is shortened as the value of the summary level increases). The “summary length” is a reduction rate with respect to the length of the entire moving image of the video content. However, the summary length is not limited to this, and may be a fixed length according to the summary level. Further, the ratio between the original moving image size and the thumbnail display size may be the ratio between the original moving image length and the summary moving image length. The summarization degree determination unit 102 calculates the total number of pixels from the thumbnail display size, and determines the summarization level (summary length) from the correspondence shown in FIG. 7, for example.

  In step S <b> 602, the video selection unit 101 determines whether the recording unit 104 has a thumbnail moving image corresponding to the summary level (summary length) determined by the summary level determination unit 102. If the summary level and the summary length are determined in advance as in the example shown in FIG. 7, a thumbnail moving image is generated in advance for each video content corresponding to each level and stored in the storage unit 104. May be. The storage unit 104 searches the video content and the summary level (summary length) to determine whether or not there is a corresponding thumbnail moving image, and if the thumbnail moving image corresponding to the summary level exists in the recording unit 104 (S602). If YES is selected), the process proceeds to S603.

  Here, for example, if the summarization level is 3, the summarization length is 1/20, so that the thumbnail video in which the summarization length of the corresponding video content is 1/20 or less of the original video content. The image may be retrieved in the recording unit 104 from a measure of data length. If a corresponding thumbnail moving image is found as a result, the video selection unit 101 reads the thumbnail moving image data from the recording unit 104 and supplies the thumbnail moving image data to the thumbnail creating unit 106.

  When the corresponding thumbnail moving image does not exist in the recording unit 104 (when NO is selected in S602), the video selection unit 101 sends video content data from the recording unit 104 and content used for summarization. The summary data including the information related to the section selection is read out and supplied to the thumbnail creating unit 106, and the process proceeds to S604.

  In step S <b> 603, the summary moving image creation unit 109 of the thumbnail creation unit 106 performs decoding processing on the input thumbnail moving image as necessary to obtain each frame data of the thumbnail moving image. For example, if the thumbnail moving image is compressed in the MPEG (Moving Picture Experts Group) format, the summary moving image creating unit 109 is configured to include an MPEG decoder. The summary moving image creation unit 109 outputs the thumbnail moving image in units of frames to the display control unit 103 with the display size instructed by the display control unit 103.

  If there is no thumbnail moving image having a summary length corresponding to the storage unit 104, the summary moving image creating unit 109 analyzes the input summary data in step S604 to generate a thumbnail moving image in the video content. Decide which section to use. As a method for determining this section, as will be described later, information on the importance is added to the summary data, and the determination is made based on this.

  The summary moving image creating unit 109 decodes the data of the section determined in this way in the video content to obtain each frame data of the thumbnail moving image. The thumbnail moving image created here may be stored in the recording unit 104.

  Next, the summary moving image creating unit 109 outputs the thumbnail moving image to the display control unit 103 in a display unit instructed by the display control unit 103 in units of frames.

  In S605, the display unit 107 updates the screen at a predetermined rate, obtains an output for each frame of the moving image input to the display control unit 103 in S603 or S604, and performs display.

Here, FIG. 8 shows an example of summary data stored in the storage unit 104 described above.
FIG. 8A shows a configuration example of summary data, and FIG. 8B shows a specific example based on the configuration example of summary data. For example, in FIG. 8A, the summary data 800 is composed of two fields of the frame number 801 and the importance 802. Here, the frame number 801 indicates the start position of the importance 802 in the video content data. The first frame of the frame constituting the moving image data of the video content is set to 0, and the subsequent frames are numbered so as to increase by one. The importance 802 indicates how important each video segment is as a gist of the video content. For example, 1 is the most important here, and the importance decreases as the value increases. The summary moving image created only in the section of importance 1 has the highest degree of summarization, and if the section of importance 2 or less is used, the summary moving image becomes more redundant. For example, in FIG. 8B, the importance level from frame numbers 0 to 899 is 5, and the importance level from 900 to 2249 is 8 (hereinafter the same).

  The summary data may be recorded in the recording unit 104 when summary data is attached in association with the video content when the video content is input to the video display device 100. If it is not attached, it may be created from the result of analyzing the video content by the video analysis unit 105. This will be described later.

  The summary moving image creation unit 109 obtains the summary level and summary length output from the summary level determination unit 102 and calculates the length necessary for the thumbnail moving image. Next, a section to be used as a thumbnail moving image is determined from the summary data as shown in FIG. 8 input from the video selection unit 101.

  For example, the summary moving image creation unit 109 first selects the most important section of importance 1 and calculates the reproduction time thereof. For example, in FIG. 8B, there are 900 frames between frame numbers 2700-3599. When the frame rate is calculated at, for example, 30 fps (Frame Per Second), the playback time during this period is 30 seconds. Compare the calculated playback time with the length required for the thumbnail video, and if the playback time does not meet the required length, select another interval of the same importance or the interval of the next lower importance. Recalculate the playback time and repeat the process until the required length is exceeded.

  Note that the importance may be selected by other methods. For example, in order not to show the core scene of the video content, the highest importance section should not be selected as a thumbnail moving image. Also good.

  In the example shown in FIG. 7, it is determined that the length (reproduction time) of the summary moving image becomes shorter as the summary level becomes higher. However, the higher the summary level, the more important scene (important) of the video content becomes. A summary may be created using a high degree interval). For example, if the summary level is 3, the summary moving image may be composed of only the importance level 1 section, and if the summary level is 2, the summary moving image may be composed of only the importance level 2 or the importance level 1 and 2. Alternatively, if there are a plurality of summary moving image creation methods, different summary creation methods may be used depending on the summary level.

  In step S606, the summary moving image creation unit 109 determines whether or not the thumbnail moving image has been created. When the creation of the thumbnail moving image has been completed for all frames (YES is selected in S606), the summary moving image creating unit 109 transmits an end notification to the display control unit 103, and the process of S205 ends. If the creation of thumbnail moving images has not been completed for all frames (NO is selected in S606), the process returns to S602 and the subsequent processes are repeated.

  Upon receiving the end notification from the summary moving image creating unit 109, the display control unit 103 determines what should be displayed next as a moving image from thumbnail still images that are not currently displayed as thumbnail moving images, and selects the selected The summary name determination unit 102 outputs the identification name and display size of the video content corresponding to the thumbnail still image. In this way, the process of S205 is repeated.

[Generate summary data]
Next, the video analysis unit 105 will be described. FIG. 9 is a block diagram illustrating a configuration example of the video analysis unit 105. In FIG. 9, the video analysis unit 105 includes a content separation unit 901, a classification determination unit 902, an audio decoding unit 903, a moving image decoding unit 904, a scene detection unit 905, and an importance level determination unit 906. Composed.

  The content separation unit 901 receives video content data and separates it into various data (moving image data, audio data, and other additional data) constituting the video content. The separated information is output to the moving image decoding unit 904, the audio decoding unit 903, and the classification determination unit 902.

  The moving image decoding unit 904 receives moving image data of video content as input and performs decoding processing of moving image data. The decoded moving image is output to the scene detection unit 905, and encoded information such as a motion vector and a prediction mode obtained by the decoding process is output to the importance level determination unit 906.

  The scene detection unit 905 detects scene switching based on the degree of correlation between frames input continuously. In general, in a moving image, since the correlation between consecutive frames is high unless it is a scene conversion point, the correlation between frames is considered as a kind of time-series data, for example, a histogram calculated for each frame. This can be determined by calculating the correlation coefficient between the histograms of two consecutive frames.

  The audio decoding unit 903 receives the audio data of the video content, performs audio data decoding processing, and outputs the decoded audio data to the importance level determination unit 906.

  The classification determination unit 902 analyzes the additional data of the video content and classifies the genre of the video content. The genre classification here is the same as the EPG (Electronic Program Guide) program classification used in digital broadcasting, for example.

  The importance level determination unit 906 uses the encoded information input from the moving image decoding unit 904 and the audio data input from the audio decoding unit 903, and determines the importance of the scene from the genre classification of the video content input from the classification determination unit 902. Determine the degree. For example, the degree of importance may be determined according to the value of the motion vector magnitude or the direction variance. The importance may be determined according to the level of the voice level. The frame number at the start of the scene is determined based on the information of the scene conversion point input from the scene detection unit 905, and the summary data 800 as shown in FIG. 8 is generated by associating the importance with the frame number at the start. To do.

  The video display device may be provided with a user interface unit (not shown), and the thumbnail display size may be changed according to the user's operation via the user interface unit. For example, in the display example shown in FIG. 3A, a case where a part of the thumbnail display area 301 is enlarged without changing the aspect ratio until it becomes the same size as the thumbnail display area 301 is considered. That is, when the designated range 1001 surrounded by the dotted line in FIG. 10A is enlarged without changing the aspect ratio as shown in FIG. 10B, the processing of S203 to S205 shown in FIG. 2 is executed. N of 3 × 3 thumbnail still images are displayed as thumbnail moving images. In addition to this, for example, the display size can be changed when the arrangement order of the thumbnails is changed in the display example shown in FIG. In this case, the display control unit 103 determines the display size again in accordance with the change in the arrangement order, and outputs information related to the display size to the summarization level determination unit 102. The summarization level determination unit 102 then displays the display after the change. What is necessary is just to determine the summary level according to size and to perform the process of S204 and S205.

  Further, the display order of the thumbnail moving images may be changed according to a user operation. For example, as shown in FIG. 11 (a), thumbnails displayed in a list are specified by first specifying a column of thumbnails and then specifying a row in the selected column as shown in FIG. 11 (b). Consider the case where desired content is selected from (the order of selecting columns and rows may be reversed). At this time, when a thumbnail row is designated, the display control unit 103 selects only thumbnails arranged in the designated row as moving images, and selects N of them as thumbnail moving images, You may make it reproduce | regenerate.

  The thumbnail display size is the number of pixels in the horizontal direction and the vertical direction. However, when an external display is connected to the video display device, an apparent size may be used. In this case, the pixel size is calculated from the screen size and resolution of the external display, and the apparent size is calculated by multiplying the number of pixels in the vertical and horizontal directions of the thumbnail.

  The thumbnail may also be used to select a specific scene in the video content. In other words, it is possible for the user to select a desired scene by displaying each of a plurality of scenes (sections) in one video content as new video contents and displaying a list of thumbnails representing each section. It becomes. The present invention can be similarly applied to such a case.

  In addition to the configuration shown in FIG. 1, the video display apparatus 100 includes a communication unit for transmitting and receiving data via a network such as the Internet, so that the same applies to video content on the network. Can be handled. At this time, separately from the moving image data of the video content, if the moving image data (which may be a condensed moving image with a low degree of summarization) with a reduced amount of data for creating the condensed moving image is received and used, the thumbnail moving image is used. It takes only a short time to create an image, and it is possible to reduce the communication delay required to create a thumbnail moving image.

  Also, the object of the present invention can be achieved by supplying a recording medium on which a program code of software realizing the functions of the present embodiment is recorded to the apparatus and executing the program code by a microprocessor or DPS. In this case, the software program code itself realizes the functions of this embodiment, and the recording medium on which the program code is recorded constitutes the present invention.

  As described above, according to the present invention, a thumbnail moving image in which the summarization level of video content is changed according to the number of thumbnails displayed (or display size) is displayed. Thus, for example, when the number of displays is large, the length of the thumbnail moving image is shortened and the display is switched one after another, so that the list display state can be achieved without increasing the resources such as hardware necessary for processing. The contents of a large number of video contents can be presented. In this way, the user can accurately grasp the outline of the video content in a short time, and can access the desired video content in a very short time.

  Although the embodiment of the present invention has been described above, the video display device and the control method, program, and recording medium of the present invention are not limited to the above-described embodiment, and do not depart from the spirit of the present invention. Of course, various changes can be made.

It is a block diagram which shows the structural example of the video display apparatus which concerns on embodiment of this invention. It is a flowchart figure which shows the operation example of the video display apparatus concerning embodiment of this invention. It is a figure which shows the example of the screen layout of a list display. It is a figure which shows an example of grouping of a thumbnail. It is a figure which shows an example of the display order of a thumbnail moving image. It is a flowchart figure which shows the operation example of the display process of the thumbnail moving image which concerns on embodiment of this invention. It is a figure which shows the example of a correspondence of the display size of a thumbnail, and a summary level. It is a figure which shows an example of the summary data which concern on embodiment of this invention. It is a block diagram which shows the structural example of the video analysis part of the video display apparatus which concerns on embodiment of invention. It is a figure which shows the example of a change of the display size of a thumbnail. It is a figure which shows the example of selection of a thumbnail.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Image | video display apparatus 101 Image | video selection part 102 Summarization degree determination part 103 Display control part 104 Recording part 105 Image | video analysis part 106 Thumbnail creation part 107 Display part 108 Still image creation part 109 Summary moving image creation part 301, 303 Thumbnail display area 302, 304 Title name display area 305 Playback area 800 Summary data 801 Frame number 802 Importance 901 Content separation unit 902 Classification determination unit 903 Audio decoding unit 904 Moving image decoding unit 905 Scene detection unit 906 Importance determination unit 1001 Specified range

Claims (11)

A video display device that displays a list of images associated with video content in a single screen,
A video selection unit for selecting video content that can be reproduced;
A display control unit for determining a display size of an image to be displayed as a list from the number of the video contents;
A summary level determination unit that determines a summary level of the summary video from the display size,
The video display device, wherein the video selection unit selects a summary moving image to be reproduced based on the degree of the summary. A video display device that displays a list of images associated with video content in a single screen,
A video selection unit for selecting video content that can be reproduced;
A display control unit for determining a display size of an image to be displayed as a list from the number of the video contents;
A summarization degree determination unit that determines the degree of summarization of the summary moving image from the display size;
An image display apparatus comprising: a summary moving image creating unit that creates a summary moving image to be reproduced based on the degree of summarization.   The display control unit is configured to select a plurality of still images from among the still images displayed as a list, and to control the reproduction of the summary moving image corresponding to the still images in the still image display area. The video display device according to claim 1 or 2.   The display control unit calculates the number of the video contents that can be reproduced as the summary moving image at a time, divides the images to be displayed in a list into groups of the number of video contents that can be reproduced at a time, and from the group 4. The video display device according to claim 3, wherein the video content is selected one by one, and when the digest video of the video content is reproduced, the display of the summary video is sequentially switched.   5. The video display device according to claim 1, wherein when the display size of the images to be displayed in a list is changed, the summarization degree determination unit again determines the degree of summarization. .   The summarization level determination unit determines the degree of summarization so that the playback time of the summary video is shortened as the display size of the list-displayed image is reduced. The video display device described in one. Further, the video content analysis unit for analyzing the video content and creating importance information for each section of the moving image data constituting the video content,
The video display apparatus according to claim 2, wherein the summary moving image creating unit creates a summary moving image from the summary degree and importance information. A control method of a video display device that displays a list of images associated with video content in a single screen,
Calculating a display size of an image to be displayed in a list from the number of the video contents to be displayed in a list;
Selecting an object to be displayed by replacing it with a summary moving image among the displayed still images;
Determining a summary level of the summary video from the display size;
And a step of selecting or creating the summary moving image corresponding to the degree of the summary.   The video display device control method according to claim 8, wherein the playback time of the summary moving image is shortened as the display size of the list-displayed image is reduced.   A program for causing a computer to execute the control method of the video display device according to claim 8 or 9.   11. A recording medium on which the program according to claim 10 is recorded so as to be readable by a computer.

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