JP2011244372A - Video switching and distribution system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To switch and distribute a plurality of video contents on one channel without devising an existent terminal.SOLUTION: A video switching and distribution apparatus includes a video storage means, a video converting means, a data broadcast generating means, a video multiplexing means, a video distributing means and a request processing means. The video converting means converts one of video contents stored in the video storage means into a broadcast format. The data broadcast generating means generates data broadcast contents describing therein a list of stored video contents and a switching request for switching broadcast contents to be distributed to a portable terminal. The video multiplexing means multiplexes the generated data broadcast contents and the converted video contents to generate broadcast contents. The video distributing means distributes the generated broadcast contents to the portable terminal. The request processing means transmits to the video converting means video contents acquired from the video storage means on the basis of the switching request received from the portable terminal.

Description

  The present invention relates to a video switching distribution system, method, and program. In particular, the present invention relates to a video switching delivery system, method, and program for switching and delivering a plurality of video contents on one channel.

  In recent years, there is a method for transferring video content stored in a PC (Personal Computer) or STB (Set Top Box) to a mobile terminal. However, this method is effective when taking out video content, but if you want to view it immediately on a mobile terminal, until the video content is played back, in other words, a part of the video content is sent to the mobile terminal for playback. Alternatively, there is a problem that the user has a waiting time until the whole is transferred.

  Therefore, even if the video content is received by streaming and played back, and the playback is stopped, the video content received until the stop is stored in the buffer, so that the waiting time until the video content is played back at the start of playback is reduced. A technique for shortening has been proposed (Patent Document 1).

  On the other hand, as a device that distributes video content in real time, a technology has been proposed that enables reception and viewing of video content on a mobile terminal that supports one seg by using a small one seg transmission device limited to the home (Patent Document 2). ). According to this method, video content stored on a PC or STB can be viewed immediately while minimizing the waiting time until video content is played back in a very limited area such as at home. It becomes.

JP 2008-211611 A JP 2009-141497 A

  However, the technique described in Patent Literature 1 has a problem that it is necessary to install dedicated reception software on the mobile terminal, and the mobile terminal must support network communication with home devices. It was.

  On the other hand, in the technique described in Patent Document 2, it is necessary to avoid a radio wave channel of a wide-area broadcast wave and use a radio channel with a very limited free band, and when a small one-segment broadcasting device is used At most, only about one channel can be distributed at the same time. However, when the one-seg broadcasting mechanism is used, switching of video content is usually realized by channel switching, and therefore, the number of channels is required by the number of video content. For this reason, there is a problem that it is not suitable for switching a plurality of video contents to be reproduced.

  The present invention has been made in view of the above problems, and an object thereof is to provide a video switching distribution system that switches and distributes a plurality of video contents through one channel without modifying existing terminals. To do. It is another object of the present invention to provide a video switching distribution system that does not have a waiting time that occurs when switching video content.

  The present invention proposes the following items in order to solve the above-described problems. In addition, in order to make an understanding easy, although the code | symbol corresponding to embodiment of this invention is attached | subjected and demonstrated, it is not limited to this.

  (1) The present invention is a mobile terminal (for example, equivalent to the mobile terminal 200 shown in FIG. 1), and a video switching delivery device (for example, shown in FIG. 1) that delivers video content to the mobile terminal using broadcast waves. 1 is a video switching distribution system (e.g., corresponding to the video distribution system 1 shown in FIG. 1), and the video switching distribution device includes a video storage unit (e.g. 1), video conversion means for converting one of the stored video contents into a broadcast format (for example, corresponding to the video conversion unit 102 shown in FIG. 1), Data for generating a data broadcast content describing a list of the stored video content and a switching request for switching the broadcast content to be distributed to the mobile terminal Transmitting and generating means (e.g., corresponding to the data broadcast generating unit 103 shown in FIG. 1), video multiplexing means (multiplexing the generated data broadcast content and the converted video content, and generating broadcast content) For example, the video multiplexing unit 104 shown in FIG. 1), video distribution means for distributing the generated broadcast content to the mobile terminal (for example, the video distribution unit 105 shown in FIG. 1), Video comprising: request processing means (for example, corresponding to the request processing unit 106 shown in FIG. 1) for instructing the video conversion means of video content to be selected from the video storage means based on a switching request received from a portable terminal A switching distribution system is proposed.

  According to this invention, the video switching distribution device includes a video storage unit, a video conversion unit, a data broadcast generation unit, a video multiplexing unit, a video distribution unit, and a request processing unit. The video storage means stores video content. The video conversion means converts one of the stored video contents into a broadcast format. The data broadcast generation unit generates data broadcast content describing a list of stored video content and a switching request for switching broadcast content distributed to the mobile terminal. The video multiplexing means multiplexes the generated data broadcast content and the converted video content to generate broadcast content. The video distribution means distributes the generated broadcast content to the mobile terminal. The request processing unit instructs the video conversion unit to select video content to be selected from the video storage unit based on the switching request received from the portable terminal. Therefore, by switching and distributing a plurality of video contents by the video switching distribution device, it is possible to switch and reproduce a plurality of videos on one channel without changing the existing mobile terminal.

  (2) The present invention provides the video switching distribution system according to (1), wherein the portable terminal issues the switching request until the mobile content is reproduced from the video switching distribution device in response to the switching request. A video switching distribution system characterized by continuing to reproduce broadcast content that has been reproduced before transmission has been proposed.

  According to the present invention, the portable terminal continues to reproduce the broadcast content that was being reproduced before transmitting the switching request until the broadcast content distributed from the video switching distribution device is reproduced in response to the switching request. Therefore, the mobile terminal can lose the waiting time of the user until the video content after switching is played back by continuously playing the video content currently being played back until the video content after switching is played back. In addition, video content can be reproduced without interruption.

  (3) In the video switching distribution system according to any one of (1) and (2), the video content list is a list of content identification information for identifying the stored video content. We have proposed a video switching distribution system characterized by this.

  According to the present invention, the list of video contents is a list of content identification information for identifying stored video contents. Therefore, by displaying a list of content identification information of video content stored in the video switching distribution device on the mobile terminal including the list of content identification information in the broadcast content, the user is stored in the video switching distribution device. Video content can be recognized.

  (4) In the video switching distribution system according to any one of (1) to (3), the present invention is characterized in that the video content list includes metadata of each of the stored video content. A video switching distribution system is proposed.

  According to the present invention, the video content list includes metadata of each stored video content. Therefore, metadata is included in the list of content information included in the broadcast content, and the mobile terminal displays the metadata such as the content name of the video content stored in the video switching distribution device, so that the user can switch the video. It is possible to know information on video content stored in the distribution apparatus.

  (5) The present invention relates to the video switching distribution system according to any one of (3) and (4), wherein the video content list includes information for identifying broadcast content being reproduced. A video switching distribution system is proposed.

  According to the present invention, the list of video contents includes information for identifying broadcast contents being reproduced. Therefore, the user can recognize which video content is being played back.

  (6) In the video switching distribution system according to any one of (1) to (5), the switching request includes device identification information and content identification information for identifying the video switching distribution device. We have proposed a video switching distribution system.

  According to the present invention, the switching request includes device identification information and content identification information for identifying the video switching distribution device. Therefore, the video content after switching and the video switching distribution device storing the video content can be specified by the switching request.

  (7) In the video switching distribution system according to (6), the switching request includes a command in which the switching request includes the device identification information and the content identification information in a URL format, A terminal proposes a video switching distribution system in which the switching request is transmitted using an HTTP protocol.

  According to the present invention, the switching request includes a command in which device identification information and content identification information are described in the URL format, and the mobile terminal transmits the switching request using the HTTP protocol. Therefore, it is possible to make a switching request to the video distribution switching device using the function of the existing portable terminal, that is, without modifying the existing portable terminal.

  (8) The video switching distribution system according to (7), wherein the data broadcast content is a BML file in which a link to a switching request command is described in the list. Has proposed.

  According to the present invention, the data broadcast content is a BML file in which a link to a switching request command is described in the list. Therefore, since the link to the switching request command is described in the list displayed on the mobile terminal, the user can easily make a switching request by selecting the video content to be reproduced after switching from the list.

  (9) The present invention is a video switching distribution device that distributes video content to a terminal using broadcast waves, and broadcasts one of the stored video content and video storage means for storing the video content. Video conversion means for converting to a format for use, data broadcast generation means for generating a data broadcast content describing a list of stored video content and a switching request for switching broadcast content to be distributed to the mobile terminal Video multiplexing means for multiplexing the generated data broadcast content and the converted video content to generate broadcast content, and video distribution means for distributing the generated broadcast content to the terminal The video content selected from the video storage means based on the switching request received from the terminal is converted into the video conversion unit. It proposes a video switch delivery apparatus comprising: a request processing means for instructing, to the.

  According to this invention, the video switching distribution device includes a video storage unit, a video conversion unit, a data broadcast generation unit, a video multiplexing unit, a video distribution unit, and a request processing unit. The video storage means stores video content. The video conversion means converts one of the stored video contents into a broadcast format. The data broadcast generation unit generates a data broadcast content describing a list of stored video content and a switching request for switching the broadcast content distributed to the terminal. The video multiplexing means multiplexes the generated data broadcast content and the converted video content to generate broadcast content. The video distribution means distributes the generated broadcast content to the terminal. The request processing unit instructs the video conversion unit to select video content to be selected from the video storage unit based on the switching request received from the terminal. Therefore, by switching and distributing a plurality of video contents by the video switching distribution device, it is possible to switch and reproduce a plurality of videos on one channel without changing the existing terminal. Also, it is possible to switch and reproduce a plurality of images with less CPU power than to switch and reproduce the images using a plurality of channels.

  (10) The present invention is a video distribution method of a video switching distribution system including a mobile terminal and a video switching distribution device that distributes video content to the mobile terminal using broadcast waves, and storing the video content A step of converting one of the stored video contents into a broadcast format (for example, S01 shown in FIG. 4), a list of the stored video contents, and a broadcast distributed to the mobile terminal A step (eg, S02 shown in FIG. 4) of generating a data broadcast content describing a switching request for switching the content for use, and the generated data broadcast content and the converted video content are multiplexed for broadcasting. A step of generating content (for example, S03 shown in FIG. 4), and the generated broadcast content A step of distributing to the band terminal (for example, S04 shown in FIG. 4) and a step of instructing the video content to be selected from the stored video content based on the switching request received from the terminal (for example, shown in FIG. 4) S06) is proposed.

  According to the present invention, the video switching distribution device stores video content. The video switching distribution device converts one of the stored video contents into a broadcast format. The video switching distribution device generates a data broadcast content in which a list of stored video content and a switching request for switching the broadcast content to be distributed to the mobile terminal are described. Next, the video switching distribution device multiplexes the generated data broadcast content and the converted video content to generate broadcast content. The video switching distribution device distributes the generated broadcast content to the mobile terminal. Furthermore, the video switching distribution device instructs video content to be selected from the stored video content based on the switching request received from the mobile terminal. Therefore, by switching and delivering a plurality of video contents, a plurality of videos can be switched and reproduced in one channel without changing the existing portable terminal.

  (11) The present invention is a program for causing a computer to execute a video distribution method of a video switching distribution system including a mobile terminal and a video switching distribution device that distributes video content to the mobile terminal using broadcast waves. A step of storing the video content, a step of converting one of the stored video content into a broadcast format (for example, S01 shown in FIG. 4), a list of the stored video content, And a step (eg, S02 shown in FIG. 4) of generating a data broadcast content describing a switching request for switching the broadcast content to be distributed to the mobile terminal, the generated data broadcast content and the converted video Step of multiplexing content and generating broadcast content (for example, S03 shown in FIG. 4) A step of distributing the generated broadcast content to the mobile terminal (for example, S04 shown in FIG. 4), and a video selected from the stored video content based on the switching request received from the mobile terminal A program for causing a computer to execute a step of instructing content (for example, S06 shown in FIG. 4) is proposed.

  According to the present invention, the video switching distribution device stores video content. The video switching distribution device converts one of the stored video contents into a broadcast format. The video switching distribution device generates a data broadcast content in which a list of stored video content and a switching request for switching the broadcast content to be distributed to the mobile terminal are described. Next, the video switching distribution device multiplexes the generated data broadcast content and the converted video content to generate broadcast content. The video switching distribution device distributes the generated broadcast content to the mobile terminal. Further, the video switching distribution device instructs video content to be selected from the stored video content based on the switching request received from the mobile terminal. Therefore, by switching and delivering a plurality of video contents, a plurality of videos can be switched and reproduced in one channel without changing the existing portable terminal.

  According to the present invention, it is possible to switch and deliver a plurality of video contents through one channel without modifying existing terminals. In addition, it is possible to lose the waiting time that occurs when switching video content.

It is a figure which shows the structure of the video switching delivery system which concerns on this invention. It is a figure which shows the example of a display of the video content in the portable terminal which concerns on this invention. It is a figure which shows the time chart at the time of the switching of the content for broadcast in the portable terminal which concerns on this invention. It is a figure which shows the processing flow of the video switch delivery system which concerns on this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that the constituent elements in the present embodiment can be appropriately replaced with existing constituent elements, and various variations including combinations with other existing constituent elements are possible. Therefore, the description of the present embodiment does not limit the contents of the invention described in the claims.

  FIG. 1 is a diagram showing a configuration of a video switching distribution system 1 according to the present invention. The video switching delivery system 1 includes a video switching delivery device 100 and a mobile terminal 200. Video switching distribution apparatus 100 and portable terminal 200 are connected to a network for packet communication and a digital terrestrial broadcast network.

  The video switching distribution device 100 distributes the stored video content to the mobile terminal 200 in response to a switching request from the mobile terminal 200. As the video switching distribution device 100, for example, a PC, an STB, a television device, or the like can be used. The video switching distribution device includes a video storage unit 101, a video conversion unit 102, a data broadcast generation unit 103, a video multiplexing unit 104, a video distribution unit 105, and a request processing unit 106.

  The video storage unit 101 stores video content. The video content is downloaded from a content server or the like, or recorded from program content distributed from a broadcasting station.

  The video conversion unit 102 selects one of the video contents from the video storage unit 101, and converts the encoding format of the data of the selected video content into a format suitable for one-segment broadcasting. Here, the format suitable for one-segment broadcasting is the H264 format.

  The video conversion unit 102 may select video content based on an initial setting, or may select video content based on a switching request from the mobile terminal 200. When video content is selected based on the initial setting, when a broadcast content playback start instruction is received from the request processing unit 106, which will be described later, that is, the mobile terminal 200 sends a broadcast content playback start instruction to the video switching distribution device 100. When it is sent. Here, the initial setting is a standard set in advance for selecting video content. For example, the stored date is the latest or belongs to a user's favorite category.

  On the other hand, when selecting based on a switching request from the mobile terminal 200, when the video content to be selected is instructed from the request processing unit 106 described later, that is, the content identification information acquired from the switching request is received from the request processing unit 106. When it is received. At that time, the video conversion unit 102 selects the video content of the video storage unit 101 based on the content identification information received from the request processing unit 106. Note that the video conversion unit 102 continues the conversion as one video content by connecting the video content selected based on the switching request from the mobile terminal 200 with the video content that has been selected so far. As a result, the portable terminal 200 reproduces and displays on the same channel in such a way that the top of the video content after switching from the middle of reproduction is interrupted.

  The data broadcast generation unit 103 acquires the content identification information of all video content stored in the video storage unit 101 and the content identification information of the video content selected by the video conversion unit 102. The content identification information is a file name of video content. Further, the content identification information may be a file name with a path. The data broadcast generation unit 103 creates a list based on the acquired all content identification information. Further, the data broadcast generation unit 103 adds information indicating that the video content is being reproduced to the created list based on the content identification information of the video content selected by the video conversion unit 102. Note that the video content selected by the video conversion unit 102 is video content distributed and played back to the mobile terminal 200.

  The data broadcast generation unit 103 generates data broadcast content that is a BML (Broadcast Markup Language) document based on the list generated as described above. The data broadcast generation unit 103 passes the created data broadcast content to the video multiplexing unit 104.

  In addition, the data broadcast generation unit 103 may create a list based on the metadata when metadata is assigned to all the video contents stored in the video storage unit 101. Note that metadata is attribute data of video content, such as the video content name, the date of creation, the date of storage, the creator of the video content, and the like.

  When a large number of video contents are stored in the video storage unit 101, the data broadcast generation unit 103 may list only a predetermined number of video contents. Further, the video content may be hierarchically structured and listed in units such as categories.

  Here, the data broadcast content will be described. The data broadcasting content is a BML file in which a link to a switching command used when a switching request is made to the list is described for each video content. The switching command has content identification information of the video content after switching and device identification information of the video switching distribution device 100 in which it is stored, and is described in the URL format. Therefore, by describing the link to the switching command in the list, the user can easily switch the video content to be reproduced by pressing the link of the list displayed on the mobile terminal 200. The device identification information is an IP address or a device name.

  Specifically, the command for switching to the data broadcasting content is a URL in the format of “http: // device identification information / command name / video content file name”, and <a href = “http: //” in the BML. It is described as a link in the format of device identification information / command name / content identification information “> video content name </a>”. For example, the content identification information (for example, file name) of the video content stored in the video switching distribution device 100 with the IP address of 12.34.56.78 is “video3”, the video content name is “video3”, When the command name is “command”, <a href=“http://12.34.56.78/command/video3”> video 3 </a> is obtained.

  The switching request is to transmit the GET method of the HTTP request to the video switching distribution device 100 to the URL of the switching command linked to the video content selected by the user.

  The video multiplexing unit 104 multiplexes the video content converted by the video conversion unit 102 and the data broadcast content created by the data broadcast generation unit 103 to create a broadcast content. As a multiplexing method, the MPEG-2TS format is used.

  The video distribution unit 105 distributes the broadcast content created by the video multiplexing unit 104 to the mobile terminal 200 on a broadcast wave.

  The request processing unit 106 receives the switching request from the mobile terminal 200 and transmits the content identification information acquired from the switching request to the video conversion unit 102. Accordingly, the request processing unit 106 instructs the video conversion unit 102 to select video content from the video storage unit 101. In addition, the request processing unit 106 receives a broadcast content reproduction start instruction and an end instruction from the mobile terminal 200. When receiving the start instruction, the request processing unit 106 instructs the video conversion unit 102 to start processing. On the other hand, when the end instruction is received, the request processing unit 106 transmits to the video conversion unit 102 and instructs the end of the process.

  Here, transmission / reception of a switching request will be described. In the present invention, the HTTP request is used for transmission / reception of the switching request as described above. First, the mobile terminal 200 transmits the GET method of the HTTP request to the URL of the switching command as a switching request. In response to the switching request, that is, the HTTP request, the video switching distribution device 100 transmits the data broadcast content created by the data broadcast generation unit 103 to the mobile terminal 200 as an HTTP response to the HTTP request. The mobile terminal 200 may display the received data broadcast content. In addition, the video switching distribution device 100 that has received the switching request, that is, the HTTP request, transmits the switched broadcast content to the mobile terminal 200 through the video distribution unit 105.

  Next, the mobile terminal 200 will be described. The mobile terminal 200 receives the broadcast content carried on the broadcast wave, and switches and reproduces the received broadcast content. In addition, the mobile terminal 200 transmits a switching request to the video switching distribution device 100 in response to a user operation instructing to switch the video content being reproduced to another video content.

  The mobile terminal 200 is compatible with One Seg (one segment partial reception of ISDB-T compliant terrestrial digital broadcasting) which is a form of terrestrial digital broadcasting. However, it may correspond to broadcasting of other segments including 12 segments, and is not limited to one segment.

  As the mobile terminal 200, for example, an electronic device equipped with a BML browser such as a mobile phone, a PHS terminal, a PDA (Personal Digital Assistant), or a game machine can be used. In addition, the terminal is not limited to the electronic device described above, and may be a terminal such as a PC or a digital television as long as it supports one-segment broadcasting that is a form of terrestrial digital broadcasting. Accordingly, the terminal can switch and reproduce a plurality of images with less CPU power than the images that are switched and reproduced using a plurality of channels.

  FIG. 2 is a diagram showing a display example of broadcast content on the mobile terminal 200 according to the present invention. The display screen 201 of the portable terminal includes a content display area 202 and a data broadcast display area 203. The content display area 202 displays video content acquired from broadcast content received from the video switching distribution device 100. On the other hand, the data broadcast display area 203 displays the data broadcast content acquired from the received broadcast content or received as a response to the switching request.

  FIG. 2A shows a display example when the broadcast content includes only the data broadcast content. Since the broadcast content does not include video content, nothing is displayed in the content display area 202 as shown in the figure. On the other hand, data broadcast content is displayed in the data broadcast display area 203. In this figure, the data broadcast content is a list 210 of file names of video content stored in the video switching distribution device 100. When the user of the mobile terminal 200 selects video content to be reproduced from the list 210, the mobile terminal 200 transmits a switching request to the video switching distribution device 100.

  FIG. 2B is a display example when the broadcast content includes video content and data broadcast content. This display example is a result of selecting “video content 3” as video content to be reproduced from the list 210 by the user of the mobile terminal 200 in FIG. In the content display area 202, “video content 3” selected by the user included and distributed in the broadcast content is displayed. In the data broadcast display area 203, “Now playing” is displayed next to “Video content 3”. The display of “being reproduced” is based on information indicating that the reproduction is included in the list created by the data broadcast generation unit 103. As a result, the user can recognize what the video content being reproduced is.

  FIG. 3 is a diagram showing a time chart at the time of switching broadcast content in the mobile terminal 200 according to the present invention. The video content that is currently played back is video content A50, and the video content that is played after the user instructs the video content switching is video content B51. In addition, the time when the user performs the video content switching instruction operation on the portable terminal 200 is t1, and the time when the video content after switching is reproduced is t2.

  Conventionally, when the user operates the mobile terminal 200 to switch the video content, the video content A50 is stopped, and the video content B51 after the switching is received from the video switching distribution device 100 and played back as shown in FIG. Video content is not displayed in the content display area 202, and the user has to wait from time t1 to time t2. However, as shown in FIG. 3, in the present invention, the video content A50 is played even after the user performs an operation for switching video content to the portable terminal 200, and the video content A50 is played at the timing when the video content B51 is played. Stop. Thereby, the waiting time from the user's time t1 to t2 is lost, and the video content can be reproduced without interruption.

  FIG. 4 is a diagram showing a processing flow of the video switching distribution system 1 according to the present invention. When a broadcast content playback start request is received from the mobile terminal 200, the process starts. Note that. The video storage unit 101 stores video content downloaded from the content server in advance.

  In step (hereinafter simply referred to as “S”) 01, the video conversion unit 102 selects one video content stored in the video storage unit 101 and adapts the encoding format of the selected video content data to the one-segment broadcasting. Convert to the format.

  In S02, the data broadcast generation unit 103 generates data broadcast content based on the content identification information, metadata, etc. of the video content stored in the video storage unit 101. Note that S01 and S02 may be simultaneous.

  In S03, the video multiplexing unit 104 multiplexes the video content converted in S01 and the data broadcast content generated in S02 to generate broadcast content.

  In S04, the video distribution unit 105 transmits the broadcast content generated in S03 to the mobile terminal 200.

  In S <b> 05, the request processing unit 106 determines whether a switching request has been received from the mobile terminal 200. If the determination result is “YES”, the process proceeds to S06. On the other hand, if the determination result is “NO”, the process proceeds to S07.

  In step S <b> 06, the request processing unit 106 acquires content identification information from the switching request and transmits the content identification information to the video conversion unit 102. Then, the process returns to S01 and S02.

  In S07, the request processing unit 106 determines whether or not a broadcast content playback end instruction has been received from the mobile terminal 200. If the determination result is “YES”, the process ends. On the other hand, if the determination result is “NO”, the process returns to S05.

  As described above, according to the present embodiment, it is possible to switch and deliver a plurality of video contents through one channel without modifying existing terminals. In addition, it is possible to lose the waiting time that occurs when switching video content.

DESCRIPTION OF SYMBOLS 1 Video switching delivery system 100 Video switching delivery apparatus 101 Video storage part 102 Video conversion part 103 Video multiplexing part 104 Data broadcast generation part 105 Video distribution part 106 Request processing part 200 Portable terminal

Claims (11)

A video switching delivery system comprising a mobile terminal and a video switching delivery device for delivering video content to the mobile terminal using broadcast waves,
The video switching distribution device
Video storage means for storing video content;
Video conversion means for converting one of the stored video contents into a broadcast format;
Data broadcast generating means for generating a data broadcast content describing a list of the stored video content and a switching request for switching broadcast content to be distributed to the mobile terminal;
Video multiplexing means for multiplexing the generated data broadcast content and the converted video content to generate broadcast content;
Video distribution means for distributing the generated broadcast content to the mobile terminal;
Request processing means for instructing the video conversion means to select video content from the video storage means based on the switching request received from the portable terminal;
A video switching distribution system.   The mobile terminal continues to play the broadcast content that was played before transmitting the switch request until the broadcast content distributed from the video switch distribution device is played in response to the switch request. The video switching distribution system according to claim 1.   The video switching distribution system according to claim 1, wherein the video content list is a list of content identification information for identifying the stored video content.   4. The video switching distribution system according to claim 1, wherein the video content list includes metadata of each of the stored video content.   5. The video switching distribution system according to claim 3, wherein the video content list includes information for identifying broadcast content being reproduced.   6. The video switching distribution system according to claim 1, wherein the switching request includes device identification information for identifying the video switching distribution device and content identification information. The switching request includes a command describing the device identification information and the content identification information in a URL format,
The video switching distribution system according to claim 6, wherein the portable terminal transmits the switching request using an HTTP protocol.   8. The video switching distribution system according to claim 7, wherein the data broadcast content is a BML file in which a link to a switching request command is described in the list. A video switching distribution device that distributes video content to terminals using broadcast waves,
Video storage means for storing video content;
Video conversion means for converting one of the stored video contents into a broadcast format;
Data broadcast generating means for generating a data broadcast content describing a list of the stored video content and a switching request for switching broadcast content to be distributed to the mobile terminal;
Video multiplexing means for multiplexing the generated data broadcast content and the converted video content to generate broadcast content;
Video distribution means for distributing the generated broadcast content to the terminal;
Request processing means for transmitting the video content acquired from the video storage means based on the switching request received from the terminal to the video conversion means;
A video switching distribution device. A video distribution method of a video switching distribution system comprising a mobile terminal and a video switching distribution device that distributes video content to the mobile terminal using broadcast waves,
Saving video content; and
Converting one of the stored video content to a broadcast format;
Generating a list of stored video content and data broadcast content describing a switching request for switching broadcast content to be distributed to the mobile terminal;
Multiplexing the generated data broadcast content and the converted video content to generate broadcast content;
Delivering the generated broadcast content to the mobile terminal;
Instructing video content to be selected from the stored video content based on a switching request received from the mobile terminal;
A video switching distribution method. A program for causing a computer to execute a video distribution method of a video switching distribution system including a portable terminal and a video switching distribution device that distributes video content to the portable terminal using broadcast waves,
Saving video content; and
Converting one of the stored video content to a broadcast format;
Generating a list of stored video content and data broadcast content describing a switching request for switching broadcast content to be distributed to the mobile terminal;
Multiplexing the generated data broadcast content and the converted video content to generate broadcast content;
Delivering the generated broadcast content to the mobile terminal;
Instructing video content to be selected from the stored video content based on a switching request received from the mobile terminal;
A program that causes a computer to execute.