JP2007189552A - Network streaming system and server - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a network streaming system and a server capable of displaying a list of thumbnails of a moving picture file at a high speed in a network player, reducing the load of a network caused by the simplification of a processing procedure and alleviating an access load to a storage device without having to access the held moving picture file point by point in the server when displaying the list of thumbnails. <P>SOLUTION: The server 1 is provided with a means 15 for generating a thumbnail moving picture data for making a plurality of thumbnail images representing contents of a plurality of moving picture data frame data and association information for associating each frame of the thumbnail moving picture data with moving picture data identification information for identifying the plurality of moving picture data, and a storage means 14 for storing the thumbnail moving picture data and the association information. A reproduction terminal 2 is provided with a means 25 for generating the list information of thumbnail images of the plurality of moving picture data on the basis of the thumbnail images of the thumbnail moving picture data acquired from the server and the association information when displaying contents of the plurality of moving picture data held by the server as thumbnail images. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a network streaming system and a server that reproduce video, audio, and the like over a network.

  At present, network media players (hereinafter also referred to as network players or playback terminals) that play back video / audio recorded on a server over a network via a network have appeared due to the speeding up of personal computers and network devices. In addition, standardization is being promoted by the DLNA (Digital Living Network Alliance), an organization that promotes standardization activities to realize interoperability between servers and clients of various manufacturers. Further, in recent years, a large amount of moving image data can be stored in a hard disk device by increasing the capacity of the hard disk device. However, the task of finding desired moving image data from a large amount of moving image data is mainly based on character information such as a file name and storage date and time, and the more the number of data, the more difficult it becomes.

For this reason, many moving image players having a thumbnail display function for displaying one frame in moving image data as a representative image together with a file name have been developed. Regarding the selection of a moving image file using thumbnails, for example, in the technique disclosed in Patent Document 1 below, a display method that allows a user to select more easily using thumbnails has been proposed. The outline of this technology is that video data captured by a video camera or a digital camera whose date is important for a photographer is displayed on a calendar screen.
JP 2004-297649 A (Summary, FIG. 1)

  In order for the network player to display a thumbnail list of moving image files held by the server, it is necessary to generate thumbnail images by receiving and decoding all moving image files held by the server. For example, as shown in FIG. 14, a server holding four moving image files and a network player for streaming reproduction of moving image files held by the server are connected via a LAN (Local Area Network), and the network player is connected to the server. Consider a case where a thumbnail list of a video file is displayed. In this case, the network player receives and decodes the moving image file a from the server, obtains a thumbnail image of the moving image file a, and then stops receiving the moving image file a. By performing such a procedure similarly for the other moving image files b to d, a thumbnail list of moving image files held by the server can be displayed. In the example of FIG. 14, in order for the network player to display the thumbnail list, it is necessary to receive and decode four moving image files, and file access occurs four times on the server side. As described above, when the network player displays the thumbnail list of the moving image files held by the server, the processing cost increases in both the server and the network player as the number of moving image files in the server increases. Therefore, in the case of a server that operates in an operating environment with low processing capability, such as home appliances, a delay occurs in data transmission to the network player (client). On the network player side, it is necessary to receive and decode moving image data in order to generate thumbnail images for all moving image files. It takes time to display all images as the number of thumbnail images displayed increases. It becomes like this.

  The present invention is for solving the above-described problem. When displaying a thumbnail list of a large number of video files (video data), the network player (playback terminal) can display the thumbnail list at high speed, It is an object of the present invention to provide a network streaming system and server that can simplify the network load and reduce the load on the network, and further eliminate the need for the server to access the stored moving image file one by one, thereby reducing the access load on the storage device.

  In order to achieve the above object, according to the present invention, a server that holds a plurality of moving image data, and a playback terminal that acquires the moving image data held by the server via a network and performs streaming playback, A network streaming system that presents a user with the contents of the moving image data held by the server as thumbnail images, the server representing a plurality of pieces of content of the plurality of moving image data based on the plurality of moving image data Generating a thumbnail file composed of thumbnail moving image data having the thumbnail image as frame data and association information associating each frame of the thumbnail moving image data with moving image data identification information for identifying the plurality of moving image data Means and holding the generated thumbnail file Storage means, and the playback terminal acquires the thumbnail file from the server when displaying the contents of the plurality of moving image data held by the server as thumbnail images on the display means. There is provided a network streaming system comprising means for generating a list of thumbnail images indicating the contents of the plurality of moving image data based on the thumbnail image of the thumbnail moving image data of the thumbnail file and the association information. With this configuration, a thumbnail list can be displayed at high speed on the network player (playback terminal), the processing procedure can be simplified, the load on the network can be reduced, and the server can eliminate the need to access each stored video file one by one. Can reduce the access load.

  According to the present invention, there is provided a server that holds a plurality of moving image data, and a playback terminal that acquires the moving image data held by the server via a network and performs streaming reproduction, and the server holds the server. A network streaming system for presenting the contents of moving image data as thumbnail images to a user, wherein the server converts a plurality of thumbnail images representing the respective contents of the plurality of moving image data into frame data based on the plurality of moving image data. Generating means for generating a file of thumbnail video data, and a file of association information for associating each frame of the thumbnail video data with video data identification information for identifying the plurality of video data; The thumbnail video data file and the association information file Storage means for holding a file, and when the playback terminal displays the contents of the plurality of video data held by the server as thumbnail images on the display means, the file of the thumbnail video data from the server and The association information file is acquired, and the thumbnail image list information indicating the contents of the plurality of moving image data is obtained based on the acquired thumbnail image of the thumbnail moving image file and the association information file. A network streaming system comprising means for generating is provided. With this configuration, a thumbnail list can be displayed at high speed on the network player (playback terminal), the processing procedure can be simplified, the load on the network can be reduced, and the server can eliminate the need to access each stored video file one by one. Can reduce the access load.

  According to the present invention, there is provided a server that holds a plurality of moving image data, and a playback terminal that acquires the moving image data held by the server via a network and performs streaming reproduction, and the server holds the server. The server of the network streaming system that presents the contents of moving image data as thumbnail images to a user, and based on the plurality of moving image data, a plurality of thumbnail images representing the contents of the plurality of moving image data are frame data Generating means for generating a thumbnail file composed of thumbnail moving image data and association information for associating each frame of the thumbnail moving image data with moving image data identification information for identifying the plurality of moving image data; Storage means for holding thumbnail files and the playback Receiving means for receiving the acquisition request for the thumbnail file from the end, acquiring means for acquiring the thumbnail file held in the storage means in response to the acquisition request for the received thumbnail file, and the acquired A server is provided that includes transmission means for transmitting a thumbnail file to the playback terminal. With this configuration, a thumbnail list can be displayed at high speed on the network player (playback terminal), the processing procedure can be simplified, the load on the network can be reduced, and the server can eliminate the need to access each stored video file one by one. Can reduce the access load.

  According to the present invention, there is provided a server that holds a plurality of moving image data, and a playback terminal that acquires the moving image data held by the server via a network and performs streaming reproduction, and the server holds the server. The server of the network streaming system that presents the contents of moving image data as thumbnail images to a user, and based on the plurality of moving image data, a plurality of thumbnail images representing the contents of the plurality of moving image data are frame data Generating means for generating a file of thumbnail moving image data, a file of association information for associating each frame of the thumbnail moving image data with moving image data identification information for identifying the plurality of moving image data, and the generated Thumbnail video data file and association information file Storage means for holding the file, receiving means for receiving the thumbnail video data file and the association information file acquisition request from the playback terminal, and holding in the storage means in response to the received acquisition request An acquisition means for acquiring the thumbnail video data file and the association information file, and a transmission means for transmitting the acquired thumbnail video data file and the association information file to the playback terminal. A server is provided. With this configuration, a thumbnail list can be displayed at high speed on the network player (playback terminal), the processing procedure can be simplified, the load on the network can be reduced, and the server can eliminate the need to access each stored video file one by one. Can reduce the access load.

  The network streaming system and server of the present invention have the above-described configuration, and when displaying a thumbnail list of a large number of moving image files (moving image data), the network player (playback terminal) can display the thumbnail list at high speed. The procedure becomes simple and the load on the network can be reduced. Further, the server does not need to access the stored moving image file one by one, thereby reducing the access load on the storage device.

<First Embodiment>
Hereinafter, a network streaming system according to a first embodiment of the present invention, and a server and a player (playback terminal) constituting the network streaming system will be described with reference to FIGS. FIG. 1 is a block diagram showing an example of the configuration of a network streaming system according to the first embodiment of the present invention. FIG. 2 is a diagram showing an example of a thumbnail image list display according to the first embodiment of the present invention. FIG. 3 is a diagram showing an example of a moving image file and a thumbnail file stored in the storage unit of the server according to the first embodiment of the present invention. FIG. 4 is a diagram for explaining an example of the configuration of the thumbnail file according to the first embodiment of the present invention. FIG. 5 is a flowchart for explaining an example of the operation of the server according to the first embodiment of the present invention. FIG. 6 is a flowchart for explaining an example of the operation of the player in the first embodiment of the present invention. FIG. 7 is a flowchart for explaining an example of the details of the thumbnail list display step of the operation of the player in the first embodiment of the present invention.

  Hereinafter, a network streaming system, a server, and a player according to the first embodiment of the present invention will be described with reference to FIG. As shown in FIG. 1, the server 1 and the player 2 are connected via a communication network 3. The player 2 in the network streaming system has a decoder (decoding means 24) for decoding a moving image file (corresponding to the above-described moving image data) held in advance by the server 1. The player 2 has a function of displaying a list of thumbnail images of the moving image files held by the server 1, and the user can play / stop any moving image file from the list of thumbnail images.

  An example of a list display of thumbnail images is shown in FIG. As shown in FIG. 2, thumbnail images in each moving image file are displayed on the display means (display or the like) (not shown) by the number of moving image files. The server 1 is a terminal device that transfers a moving image file held by the server 1 itself in response to a request from the player 2.

  Here, the configuration of the server 1 will be described first. The storage unit 14 stores a plurality of moving image files and thumbnail files generated by the generating unit 15 based on the plurality of moving image files. Note that the thumbnail file may not be generated by the generation unit 15 but may be generated by an external device (not shown). An example of a moving image file and a thumbnail file stored in the storage unit 14 is shown in FIG. As shown in FIG. 3, the storage means 14 stores N moving image files and one thumbnail file. The contents of the thumbnail file are shown in FIG. As shown in FIG. 4, the thumbnail file is composed of an Index information portion and a moving image data portion. The moving image data portion is moving image data (corresponding to the above-described thumbnail moving image data) in which each frame 1 to N is composed of thumbnail images of moving image files 1 to N in FIG. It is recorded in a moving image format that can be processed by the decoder of the player 2. The Index information part is index information (corresponding information described above) for associating each frame 1 to N of the moving picture data part with the file names of the moving picture files 1 to N (corresponding to the moving picture data identification information described above). Is stored. 3 and 4, the first frame of the moving image data portion in the thumbnail file is the thumbnail image of the moving image file 1, and the second frame is the thumbnail image of the moving image file 2.

  The receiving means 10 receives command information from the player 2 and outputs it to the command processing means 12. In the first embodiment, there are two types of command information that the player 2 transmits to the server 1, a file transmission request and a file transmission stop request, and the file transmission request includes an arbitrary file name. Note that the command information is not limited to two types. Further, the command processing means 12 instructs the file acquisition means 13 to read the file or stop reading the file according to the received command information. The file acquisition unit 13 receives an instruction of a file transmission request from the command processing unit 12, reads an arbitrary file from the storage unit 14, and outputs it to the transmission unit 11. The transmission unit 11 transmits the moving image file or the thumbnail file output from the file acquisition unit 13 to the player 2 via the communication network 3.

  Next, the operation of the server 1 will be described with reference to FIG. As shown in FIG. 5, first, in the command receiving step S51, the receiving means 10 receives command information. In command determination step S52, the command processing means 12 confirms the contents of the command information. If the file transmission request is confirmed, the transmission unit 11 transmits the file acquired by the file acquisition unit 13 in the file transmission step S53. On the other hand, if it is confirmed in the command determination step S52 that the file transmission stop request is received, the transmission unit 11 stops the file transmission in the file transmission stop step S54.

  Next, the configuration of the player 2 will be described with reference to FIG. The command input means 28 outputs command information by the operation from the user to the control means 27. The control unit 27 controls the reception unit 21, the transmission unit 22, and the thumbnail list generation unit 25 according to the command input from the command input unit 28. The receiving unit 21 receives the moving image file from the server 1 and outputs it to the decoding unit 24 or receives the thumbnail file and outputs it to the thumbnail file separating unit 23. The thumbnail file separating means 23 separates the thumbnail file received by the receiving means 21 into an Index information portion and a moving image data portion, outputs Index information to the thumbnail list generating means 25, and decodes moving image data in the moving image data portion. Output to.

  The decoding unit 24 decodes the data input from the receiving unit 21 and outputs it to the display unit 26. Also, the data input from the thumbnail file separating unit 23 is decoded and output to the thumbnail list generating unit 25. The thumbnail list generating unit 25 displays a list of thumbnail images of the moving image file held by the server 1 from each frame of the moving image data input from the decoding unit 24 and the Index information obtained from the thumbnail file separating unit 23. Create and output to display means 26. The display unit 26 displays the moving image input from the decoding unit 24 or the thumbnail image list input from the thumbnail list generation unit 25.

  Next, the operation of the player 2 will be described with reference to FIG. As shown in FIG. 6, first, in the thumbnail list display step S61, the display means 26 displays a list of thumbnail images. Details of the thumbnail list display step S61 will be described with reference to FIG. As shown in FIG. 7, in the thumbnail list display step S61, first, a thumbnail file receiving step S71 is performed in which a request for a thumbnail file is transmitted from the transmission unit 22 to the server 1, and the reception unit 21 receives the thumbnail file. Then, a thumbnail file separation step S72 is performed in which the thumbnail file separation unit 23 separates the received thumbnail file into an Index information portion and a moving image data portion. Next, a thumbnail moving image decoding step S73 for decoding the moving image data in the separated moving image data portion is performed. Next, a thumbnail list generation step S74 for creating a list of thumbnail images of the moving image files held by the server 1 from the Index information obtained by the thumbnail file separating means 23 and the frame data obtained by the decoding means 24 is performed. Next, a thumbnail list display step S75 for displaying a list of created thumbnail images on the display means 26 is performed.

  By displaying a list of thumbnail images according to the above procedure, the player 2 does not need to receive and decode all the video files held by the server 1, and creates a list of thumbnail images simply by receiving and processing the thumbnail files. can do. This simplifies the processing flow and reduces the processing cost. Further, since the moving image data in the moving image data portion is decoded using the decoding means 24 shown in FIG. 1, it is possible to expect common use of modules and cost reduction. The decoding means 24 decodes the moving image file and can output 30 frames per second. Therefore, if the thumbnail file receiving step S71 and the thumbnail file separating step S72 are sufficiently fast, 30 files per second. The above thumbnail images can be obtained.

  On the server 1 side, in order for the player 2 to display a list of thumbnail images, it is not necessary to access all the moving image files, and only the thumbnail files need be transmitted. This not only simplifies the processing procedure of the server 1, but also shortens the processing time. Due to the effects described above, the player 2 can display a list of thumbnail images of the moving image files held by the server 1 at high speed.

  Returning to the description of FIG. 6, in the command receiving step S62, a command from the user is received. When the command is received, the content of the command from the user is determined in command determination step S63. If the command indicates playback, it is checked in step S66 whether or not the player 2 is stopped, and if it is stopped, a video file request is transmitted from the transmission means 22 to the server 1 in playback start step S67. The receiving means 21 receives the moving image file. The received data is decoded by the decoding means 24 and the moving picture is displayed by the display means 26. If the player 2 is not stopped in step S66, the process returns to step S62.

  On the other hand, if the command indicates stop in step S63, it is checked in step S64 whether or not the player 2 is playing back. If playback is in progress, the sending means 22 sends the server 1 to the server 1 in stop step S65. Then, a file transmission stop request is transmitted, and the operation of the decoding means 24 is stopped. If the player 2 is not reproducing at step S64, the process returns to step S62.

  As described above, in the network streaming system according to the first embodiment configured by the server 1 and the player 2, when the player 2 displays the contents of the moving image file as a thumbnail image, the server 1 holds the moving image file held by itself. It is not necessary to access everything, and it is only necessary to transmit the thumbnail file to the player 2. This eliminates the need for access to a plurality of moving image files, thereby reducing processing costs. In addition, thumbnail image information can be transmitted at high speed. On the other hand, since all thumbnail images can be obtained by receiving and decoding thumbnail files on the player 2 side, the processing procedure is simplified and the processing cost can be reduced. The decoding unit 24 is a unit that decodes a moving image file, and can output 30 frames per second. Therefore, since the thumbnail file can be decoded at high speed, the player 2 stores all thumbnail images. It can be displayed at high speed.

<Second Embodiment>
Hereinafter, a network streaming system according to the second embodiment of the present invention, and a server and a player (playback terminal) constituting the network streaming system will be described with reference to FIGS. FIG. 8 is a block diagram showing an example of the configuration of the network streaming system according to the second embodiment of the present invention. FIG. 9 is a diagram showing an example of a moving image file, a thumbnail moving image file, and a thumbnail index file stored in the storage unit of the server according to the second embodiment of the present invention. FIG. 10 is a diagram for explaining an example of the configuration of a thumbnail moving image file according to the second embodiment of the present invention. FIG. 11 is a diagram for explaining an example of the configuration of the thumbnail index file according to the second embodiment of the present invention. FIG. 12 is a flowchart for explaining an example of the operation of the player in the second embodiment of the present invention. FIG. 13 is a flowchart for explaining an example of the details of the thumbnail list display step of the operation of the player in the second embodiment of the present invention.

  Similarly to the network streaming system according to the first embodiment, the server 801 and the player 802 are connected via the communication network 803 in the network streaming system according to the second embodiment. The player 802 has a decoder (decoding means 824) that decodes a moving image file held in advance by the server 801. The player 802 has a function of displaying a list of thumbnail images of the moving image files held by the server 801, and the user can play / stop any moving image file from the list of thumbnail images.

  Here, the configuration of the server 801 will be described first. The storage unit 814 stores a plurality of moving image files and a thumbnail moving image file and a thumbnail index file generated by the generating unit 815 based on the plurality of moving image files. Note that the thumbnail moving image file and the thumbnail index file may not be generated by the generating unit 815 but may be generated by an external device (not shown). An example of a moving image file, a thumbnail moving image file, and a thumbnail index file stored in the storage unit 814 is shown in FIG. As shown in FIG. 9, the storage unit 814 stores N moving image files, one thumbnail moving image file, and one thumbnail Index file. The contents of the thumbnail video file are shown in FIG. As shown in FIG. 10, the thumbnail moving image file is a file of moving image data (corresponding to the above-described thumbnail moving image data) in which each frame 1 to N is composed of the thumbnail images of the moving image files 1 to N in FIG. Like the moving image files 1 to N, the moving image file is recorded in a moving image format that can be processed by the decoder of the player 802.

  In the example of FIG. 10, the first frame in the thumbnail moving image file is the thumbnail image of the moving image file 1, and the second frame is the thumbnail image of the moving image file 2. FIG. 11 shows the contents of the thumbnail index file. As shown in FIG. 11, the thumbnail index file is information (corresponding to the association described above) that associates the frames 1 to N of the thumbnail moving image file with the file names (corresponding to the moving image data identification information described above) of the moving image files 1 to N. (Corresponding to information) is stored. Note that the other components of the server 801 are the same as the components of the server 1 of the first embodiment, and thus description thereof is omitted.

  Next, the configuration of the player 802 will be described. The receiving unit 821 receives a moving image file, a thumbnail moving image file, or a thumbnail index file from the server 801. When a moving image file or a thumbnail moving image file is received, the receiving unit 801 outputs to the decoding unit 824, and when a thumbnail index file is received, the receiving unit 801 outputs to the thumbnail list generating unit 825. The thumbnail list generation unit 825 creates a list of thumbnail images of the moving image files held by the server 801 from each frame of the moving image data input from the decoding unit 824 and the thumbnail index file received by the receiving unit 821. To the display means 826.

  Next, the operation of the player 802 will be described with reference to FIG. As shown in FIG. 12, first, in the thumbnail list display step S121, the display means 826 displays a list of thumbnail images. Details of the thumbnail list display step S121 will be described with reference to FIG. As shown in FIG. 13, in the thumbnail list display step S121, first, a thumbnail index file request is transmitted from the transmission unit 822 to the server 801, and the reception unit 821 receives the thumbnail index file reception step S131. . Then, a thumbnail moving image file request is transmitted from the transmitting unit 822 to the server 801, and the receiving unit 821 receives a thumbnail moving image file. Then, a thumbnail moving image decoding step S133 for decoding the received thumbnail moving image file by the decoding means 824 is performed. Next, a thumbnail list generation step S134 for creating a list of thumbnail images of moving image files held by the server 801 from the received thumbnail index file and frame data obtained from the decoding means 824 is performed. Next, a thumbnail list display step S135 for displaying a list of created thumbnail images on the display means 826 is performed.

  By displaying the list of thumbnail images according to the above procedure, the player 802 does not need to receive and decode all the video files held by the server 801, and receives and processes the thumbnail index file and the thumbnail video file. Simply create a list of thumbnail images. This simplifies the processing flow and reduces processing costs. Further, since the moving image data of the thumbnail moving image file is decoded using the decoding means 824 shown in FIG. 8, it is possible to expect common use of modules and cost reduction. The decoding means 824 decodes a moving image file and can output 30 frames per second. Therefore, if the thumbnail index file receiving step S131 is sufficiently fast, 30 or more thumbnail images per second can be obtained. The thumbnail list can be displayed very quickly.

  On the server 801 side, in order for the player 802 to display a list of thumbnail images, it is not necessary to access all the moving image files, and only the thumbnail index file and the thumbnail moving image file need be transmitted. Due to the effects described above, not only the processing procedure of the server 801 is simplified, but also the processing time is shortened. Thus, the player 802 can display a list of thumbnail images of moving image files held by the server 801 at high speed. The above is the details of the thumbnail list display step S121. Note that the other processes from step S122 to step S127 are the same as those in the first embodiment, and thus description thereof is omitted. As described above, with respect to the thumbnail list display of the player, the processing procedure of the player and the server is simplified, and the player can display the thumbnail list at high speed.

  When the network streaming system and the server according to the present invention display a thumbnail list of a large number of video files (video data), the network player (playback terminal) can display the thumbnail list at high speed, and the processing procedure is simplified. Network streaming system and server that reproduce video, audio, etc. over the network because the load on the network can be reduced and the access to the storage device can be reduced because there is no need to access the stored video files one by one on the server Useful for.

It is a block diagram which shows an example of a structure of the network streaming system which concerns on the 1st Embodiment of this invention. It is a figure which shows an example of the list display of the thumbnail image in the 1st Embodiment of this invention. It is a figure which shows an example of the moving image file and thumbnail file which are memorize | stored in the memory | storage means of the server which concerns on the 1st Embodiment of this invention. It is a figure for demonstrating an example of a structure of the thumbnail file in the 1st Embodiment of this invention. It is a flowchart for demonstrating an example of operation | movement of the server which concerns on the 1st Embodiment of this invention. It is a flowchart for demonstrating an example of operation | movement of the player in the 1st Embodiment of this invention. It is a flowchart for demonstrating an example of the detail of the thumbnail list display step of the operation | movement of a player in the 1st Embodiment of this invention. It is a block diagram which shows an example of a structure of the network streaming system which concerns on the 2nd Embodiment of this invention. It is a figure which shows an example of the moving image file, thumbnail moving image file, and thumbnail Index file which are memorize | stored in the memory | storage means of the server which concerns on the 2nd Embodiment of this invention. It is a figure for demonstrating an example of a structure of the thumbnail moving image file in the 2nd Embodiment of this invention. It is a figure for demonstrating an example of a structure of the thumbnail Index file in the 2nd Embodiment of this invention. It is a flowchart for demonstrating an example of operation | movement of the player in the 2nd Embodiment of this invention. It is a flowchart for demonstrating an example of the detail of the thumbnail list display step of the operation | movement of a player in the 2nd Embodiment of this invention. It is a block diagram which shows an example of a structure of the conventional network streaming system.

Explanation of symbols

1, 801 server 2, 802 player (network player, playback terminal)
3,803 Communication network 10, 21, 810, 821 Reception means 11, 22, 811, 822 Transmission means 12, 812 Command processing means 13, 813 File acquisition means 14, 814 Storage means 15, 815 Generation means 23 Thumbnail file separation means 24,824 Decoding means 25,825 Thumbnail list generation means 26,826 Display means 27,827 Control means 28,828 Command input means

Claims (4)

A server that holds a plurality of moving image data; and a reproduction terminal that acquires the moving image data held by the server via a network and performs streaming reproduction. The contents of the moving image data held by the server are used as thumbnail images. A network streaming system presented to a user,
The server, based on the plurality of video data, thumbnail video data having a plurality of thumbnail images representing the contents of the plurality of video data as frame data, each frame of the thumbnail video data, and the plurality of videos A generation unit that generates a thumbnail file including association information that associates video data identification information for identifying data, and a storage unit that holds the generated thumbnail file;
The playback terminal acquires the thumbnail file from the server when displaying the contents of the plurality of video data held by the server as thumbnail images on a display unit, and the thumbnail video data of the acquired thumbnail file A network streaming system comprising means for generating a list of thumbnail images indicating the contents of the plurality of moving image data based on the thumbnail images and the association information. A server that holds a plurality of moving image data; and a reproduction terminal that acquires the moving image data held by the server via a network and performs streaming reproduction. The contents of the moving image data held by the server are used as thumbnail images. A network streaming system presented to a user,
The server, based on the plurality of moving image data, a file of thumbnail moving image data having a plurality of thumbnail images representing the contents of the plurality of moving image data as frame data, each frame of the thumbnail moving image data, and the plurality of frames Generating means for associating the moving picture data identification information for identifying the moving picture data, and storing means for holding the generated thumbnail moving picture data file and the correspondence information file Comprising at least
The playback terminal obtains the thumbnail video data file and the association information file from the server when displaying the contents of the plurality of video data held by the server as thumbnail images on the display unit. A network streaming system comprising: means for generating a list of thumbnail images indicating the contents of the plurality of moving image data based on the thumbnail image of the thumbnail moving image data file and the file of the association information. A server that holds a plurality of moving image data; and a reproduction terminal that acquires the moving image data held by the server via a network and performs streaming reproduction. The contents of the moving image data held by the server are used as thumbnail images. The server of the network streaming system presented to the user,
Based on the plurality of moving image data, the thumbnail moving image data including a plurality of thumbnail images representing the contents of the plurality of moving image data as frame data, each frame of the thumbnail moving image data, and the plurality of moving image data are identified. Generating means for generating a thumbnail file composed of association information for associating video data identification information for
Storage means for holding the generated thumbnail file;
Receiving means for receiving an acquisition request for the thumbnail file from the playback terminal;
An acquisition means for acquiring the thumbnail file held in the storage means in response to the acquisition request for the received thumbnail file;
Transmitting means for transmitting the obtained thumbnail file to the playback terminal;
Server to provide. A server that holds a plurality of moving image data; and a reproduction terminal that acquires the moving image data held by the server via a network and performs streaming reproduction. The contents of the moving image data held by the server are used as thumbnail images. The server of the network streaming system presented to the user,
Based on the plurality of moving image data, a file of thumbnail moving image data having a plurality of thumbnail images representing the contents of the plurality of moving image data as frame data, each frame of the thumbnail moving image data, and the plurality of moving image data Generating means for generating a file of association information that associates video data identification information for identification;
Storage means for holding the generated thumbnail video data file and the association information file;
Receiving means for receiving an acquisition request for the thumbnail video data file and the association information file from the playback terminal;
An acquisition unit for acquiring the thumbnail video data file and the association information file held in the storage unit in response to the received acquisition request;
Transmitting means for transmitting the acquired thumbnail video data file and the association information file to the playback terminal;
Server to provide.

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