JP2007194680A - Moving picture viewing method, and communication terminal and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a moving picture viewing method whereby a noted viewing object, the importance of real-time performance, a resolution, and an area to be viewed or the like can be designated and a moving picture with quality optimum to a network environment can be viewed. <P>SOLUTION: A communication terminal 10 receives a summary picture indicating a summary of a moving picture to be viewed from a moving picture distribution server (hereinafter called the server) 11, and designates view information from the summary picture. The communication terminal 10 transmits the designated view information to the server 11 and receives the designated moving picture on the basis of the view information from the server 11. Further, the communication terminal 10 receives a quality information list of the designated moving picture which the server 11 can distribute from the server 11. The communication terminal 10 generates flow information on the basis of the quality information list and allocates a bandwidth to each flow of the designated moving picture on the basis of the flow information. The communication terminal 10 transmits the selected quality information to the server 11 on the basis of the quality information list and the allocated bandwidths and receives the designated moving picture with the selected quality from the server 11. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention has a communication path selection function in a third layer mobility management protocol such as MobileIP, and uses a transmission / reception method for allocating a bandwidth to an application to receive a desired video on a communication terminal, a communication terminal, and Regarding the program.

  In recent years, research and development of mobility support in the IP layer such as Mobile IPv6 (Mobility Support in IPv6, RFC3775) has been actively conducted. MobileIP is a third-layer protocol in the OSI (Open Systems Interconnection) 7-layer model. It is a technology that hides client movement (switching of network / communication media, communication interruption, etc.) from higher-level applications and continues communication. It is. This MobileIP is composed of nodes called a mobile node (MN), a home agent (HA), and a correspondent node (CN).

  A mobile node (MN) always has an invariable address called a home address, and a node that manages the address is a home agent (HA). When the MN connects to a network other than the home link that is the HA link, the MN obtains an address called a care-of address (CoA) by some means (RA, DHCPv6, etc.). The CoA obtained here is notified to the HA by a message “Binding Update”.

  As a result, when a node (= CN) that wants to communicate with the MN transmits a packet addressed to the home address, the home address reaches the HA once because the home address is the address of the link managed by the HA. At that time, the HA transfers to the CoA associated with the home address. As a result, the MN can always communicate with the home address. In the MN, an application operating on the MN always uses the IP address called the home address for communication.

  CoA is used as a source address or destination address of an actual IPv6 (Internet Protocol Version 6) packet, and a home address is used as an embedded address such as IPv6 over IPv6 encapsulation or mobility header. As a result, the home address is notified to the application, and the IPv6 address (CoA) actually used is concealed. As a result, the application has the following characteristics.

  (1) When there is connectivity with a network, communication is always possible using a home address. (2) During communication, handover to a plurality of different networks can be performed. That is, the MobileIP compatible terminal can have a plurality of communication media (for example, NIC: Network Interface Card), and can perform handover across the plurality of communication media. As a known problem of MobileIP, when a MobileIP compatible terminal has a plurality of communication media, there is a problem of which communication media is used, that is, which address is used for CoA.

  In addition, when MobileIP has a plurality of CoAs, it is often said that it can realize multihome using a plurality of communication media simultaneously. However, in the actual MobileIP specification, it is impossible to realize multi-home. Therefore, as one means for realizing it, all CoAs should be notified to the communication partner. "Draft-Wakikawa-mobileip-multiplecoa", which is the specification of MobileIP at the time of holding, has been proposed. However, although this proposal supports multihoming, it is not specified how to realize multihoming and how to select an optimal combination of communication media.

  Therefore, the applicant can select a combination of communication media between the user and the partner terminal that reflects the preference of the user or the application for each flow in the plurality of flows on the communication terminal, and communication with the plurality of terminals can be performed. Proposal of a transmission / reception method that is possible and that can be executed without the preference information being known to the other party.

In addition, moving image distribution can be considered as a field in which MobileIP is actively used. However, TV is a typical media for current video distribution, but all users are only provided with images at the same angle. The same can be said for VOD (Video On Demand), and video that the user likes is not provided.
Ryuji Wakikawa, four others, [online], June 20, 2005, [November 1, 2005 search], Internet (URL: http://www.nautilus6.org/doc/ drafts / draft-wakikawa-mobileip-multiplecoa-04.txt)

According to the applicant's previous proposal, the application can communicate in an appropriate band based on the usable bandwidth of the application and the user's preference for them.
However, in this proposal, the information passed between the communication management unit and the application is only information related to communication such as bandwidth, delay, packet loss rate, etc., and depending on the application used, this information alone is not sufficient. There is also. For example, in a video viewing application for viewing sports video distribution, it is preferable not only to be able to select the degree of preference for information relating to the communication described above, but also to be able to specify a target viewing target, real-time properties, resolution, viewing area, etc. .

  The present invention has been made in view of the above-described circumstances, and provides a moving image viewing method, a communication terminal, and a moving image viewing program capable of specifying a target viewing target, the importance of real-time property, resolution, viewing area, and the like. Objective.

  The moving image viewing method according to the present invention is a moving image viewing method for viewing a moving image on a communication terminal using a moving image distribution / viewing system, wherein the communication terminal receives an image showing an overview of the viewed moving image from the moving image distribution server; Transmitting the viewing information designated by the communication terminal to the video distribution server; and receiving the designated video based on the viewing information from the video distribution server by the communication terminal.

  The video viewing method according to the present invention includes a step in which the communication terminal receives from the video distribution server a quality information list of a designated video that can be distributed by the video distribution server, and the quality information selected by the communication terminal based on the quality information list. Transmitting to the moving image distribution server; and receiving a designated moving image of the quality selected by the communication terminal from the moving image distribution server.

  The video viewing method according to the present invention includes a step of creating flow information on the communication terminal based on the quality information list, notifying the flow management application from the video viewing application to the communication management unit; And notifying the originally allocated bandwidth from the communication management unit to the video viewing application.

  Note that the viewing information specified by the communication terminal includes at least the target of interest, the viewing area, or both the target of interest and the viewing area. The flow information includes at least a necessary bandwidth as preference information, and includes one or more of delay difference information, billing information, packet loss rate information per unit time, and cell information of wireless communication media as preference information.

The communication terminal used in the moving image viewing method according to the present invention includes summary image display means for displaying an image showing an outline of a viewing moving image, and designated moving image display means for displaying a designated moving image designated by the communication terminal. The display unit that displays the screen displayed by the summary image display unit also serves as an input device for inputting viewing information.
A program according to the present invention is a program for causing a computer to execute processing used to realize the moving image viewing method of the present invention.

  According to the present invention, it is possible to specify a target to be watched by a user and an area to be viewed, and to view a moving image with quality optimal for a network environment.

(First embodiment)
The first embodiment of the present invention will be described with reference to FIGS. 1 to 10 using an example of viewing a soccer video. A schematic diagram of a system configuration example of the present embodiment is shown in FIG. 1, and a sequence diagram is shown in FIG. This system includes a communication terminal 10, a moving image distribution server 11, and access points AP200 and AP201.

  The communication terminal 10 includes a moving image viewing application 21 for viewing moving images, a communication management unit 22 that controls communication with other terminals and has functions such as bandwidth allocation, and a display unit 23 that displays various screens. IP10 is assigned as an IP address, and is connected to the Internet via its own communication media NIC100 and NIC101, and access points AP200 and AP201. The moving image distribution server 11 includes a communication management unit 32 that controls communication between the moving image distribution application 31 that distributes moving images and other terminals, and IP 11 is assigned as an IP address.

  FIG. 2 is a sequence diagram illustrating the flow of moving image distribution in the present embodiment. First, the user instructs the video viewing application 21 of the communication terminal 10 to receive a soccer video to be viewed, and the video viewing application 21 starts communication. In order to receive a moving image, the moving image viewing application 21 needs to know the location of the moving image distribution server 11 that distributes the moving image. As the method, for example, information is obtained from an HTTP (Hyper Text Transfer Protocol) server or an IC tag is used to obtain a SIP (Session Initiation Protocol) or RTSP (Real Time Streaming Protocol) URL (Universal Resource Locator). However, it is out of the scope of the present invention and will not be described in detail. The moving image viewing application 21 of the communication terminal 10 owned by the user requests the moving image distribution service to be viewed from the moving image distribution server 11 that knows the location using such a method (moving image request in FIG. 2).

The video distribution application 31 of the video distribution server 11 that has received this request starts the distribution of the video to be viewed on the communication terminal 10, that is, the viewing video, to the video viewing application 21. Note that the video distributed at this time is assumed to have a default setting. The image quality of the default moving image is preferably low because the state of the network used for communication is unknown. The contents to be distributed are also sent with default settings. This default setting may be performed on the communication terminal 10 side or on the moving image distribution server 11 side.
In addition, when receiving a default video, the communication terminal 10 provides an image and / or an overview of the viewing video for specifying viewing information such as a target to be watched and a viewing area from the video distribution server 11. The information etc. which explain are received.

FIG. 3 is a conceptual diagram of a communication terminal according to the present embodiment configured with a display unit that displays one main screen and two sub-screens. On the main screen 23a of the display unit 23, a streaming video based on the specified viewing information, that is, a specified video is obtained. In the present embodiment, a video that focuses on a designated player, a video that focuses on a portion of a soccer field, and the like are obtained. However, immediately after starting the video viewing, the default video is displayed on the main screen 23a instead of the designated video.
The sub screen can display a summary image and / or a summary explanation image for designating viewing information. In the present embodiment, an image of the entire soccer field is displayed on the sub screen 23b as a summary image, and the players are displayed as ◯. On the sub screen 23c, for example, information of each player is displayed as summary explanation information.

  The user designates a viewing area from the entire image displayed on the lower right sub-screen 23b. Alternatively, as a target of attention, a player to be viewed is specified from a plurality of circles (players) on the sub screen 23b (or from player information on the sub screen 23c). When the viewing area is designated, it is designated by selecting a rectangle, which will be described later, or by designating the viewing start location and the viewing area numerically. It is also possible to set the starting position of the viewing area in the vicinity of the goal in advance and specify only the viewing area. When a player is specified, the player may be specified by clicking a circle indicating a player, or by configuring the display unit 23 with an input device such as a touch panel so that the user taps player information.

  In the example of FIG. 3, the upper left corner of the soccer field is designated as a viewing area by rectangular selection on the sub-screen 23b. In this embodiment, only one team is displayed on the sub screens 23b and 23c. However, all players may be displayed or only some popular players may be displayed. It may be possible.

  What is important is information about what to focus on and what size you want to watch it. This information corresponds to, for example, attention to about 32 m × 18 m in the vicinity of the goal or attention to a 10 m square around the player with the spine number 10. This information designation method reflects the user's intention by changing the size and position of the rectangle enclosed on the sub-screen 23b from the above-described rectangle selection, for example, GUI (Graphical User Interface). There is a method of designating the viewing area to the moving image viewing application 21.

  In addition, after specifying a player as described above, the sub screen 23c is provided with an input field for specifying how much of the player's viewing area is centered on the player, and the user inputs to that field. Thus, there is a method of designating the target player and the viewing area. At this time, the input field may be provided on a separate screen.

  An example of the viewing information specified by these methods is shown in FIG. The information shown in FIG. 4 is calculated by the video viewing application 21 based on the user's designation. The moving image viewing application 21 transmits the calculated viewing information to the moving image distribution server 11. Here, FIG. 4A shows viewing information when the user designates an area of 32 m × 18 m starting from a point with an X coordinate of 0 m (hereinafter, m) and a Y coordinate of 10 m as the viewing area. . FIG. 4B specifies that attention is paid to the player with the number 11, but the viewing area is not specified by the user, and the default setting of the video distribution server 11 or the communication terminal 10 may be used. In this case, viewing information is shown. FIG. 4C shows viewing information when the user designates that attention is paid to the player of the number 10 and attention is paid to the area of 8 m × 6 m around the player. The calculated viewing information may be displayed on the main screen 23a, or may be displayed on the sub screens 23b and 23c.

  Here, when specifying the viewing area start position and size, it may be specified by a value mapped to the real space as in the example of FIG. 4 or specified by the number of pixels on the sub-screen 23b. Also good. When using a value mapped to the real space, the correspondence data between the real space information of the outline image, that is, the value in the real space and the number of pixels on the outline image (the entire image of the sub screen in this embodiment) is separately provided. Necessary. As indicated by a chain line in FIG. 2, the real space information of the summary image is transmitted from the moving image distribution application 31 of the moving image distribution server 11 simultaneously with or after distribution of the lowest quality moving image. In this embodiment, viewing information is designated by the number of pixels on the sub-screen, and this step is omitted, and the video viewing application 21 transmits the designated viewing information to the video distribution server 11.

Receiving the viewing information, the moving image distribution server 11 distributes the designated moving image based on the viewing information to the moving image viewing application 21 of the communication terminal 10. At the same time or after distribution, the moving image distribution server 11 presents the moving image viewing application 21 with information on the quality of one or a plurality of designated moving images that can be provided as a quality information list.
By the way, in this embodiment, a viewing area is designated as viewing information, and the moving image distribution server 11 shoots the entire soccer field with a very detailed image as shown in FIG. 5 when distributing the designated moving image. Suppose that a part thereof is cut out. That is, it is assumed that the moving image distribution server 11 can capture the whole image with a very high-definition camera such as 160000 × 90000 pixels and distribute a part thereof. The moving image distribution server 11 distributes the moving image in the viewing area specified by the user among the high-definition images as the specified moving image.

FIG. 6 is a diagram for explaining an example of the quality information list of the designated moving image. In this example, there are six types of moving image quality that can be distributed by the moving image distribution server 11 in the area specified by the user. The quality information of the moving picture viewing application 21 of which the moving picture resolution is 16000 × 9000 will be described. The number of frames per second (hereinafter referred to as fps) of the moving picture having this resolution can be 15, and the codec is codec-a. The moving image distribution server 11 can distribute a moving image having this resolution with a bandwidth of 600 Mbps. Here, the codec has four stages from codec-a to codec-d, and codec-a has the highest image quality.
The quality information of other moving image resolutions will be described in the same manner.

  Also, the moving image viewing application 21 notifies the communication management unit 22 of flow information as shown in FIGS. 7 and 8 when viewing information is specified or after receiving a response from the moving image distribution application 31 in response to the designation. The flow 1 shown in FIG. 7 corresponds to the data flow of the main screen 13a. Further, the flow 2 shown in FIG. 8 corresponds to the data flow of the sub screen 13b, and the flow 3 corresponds to the data flow of the sub screen 13c.

  The flow information includes at least a destination address (Dst Addr), a source address (Src Addr), and a destination port (Dst Port). As the bandwidth related to the preference information, the minimum necessary bandwidth (BW (MIN)), the bandwidth necessary for viewing the highest quality image (including video) that can be received by the video viewing application 21 (BW (max)) and the preference for the bandwidth is also included.

  The preference information is information such as whether priority is given to a small amount of delay or image quality, and may be set in advance or selected on a selection screen or the like each time. In addition, the preference information can be processed as a numerical value for the degree of preference (degree of preference), and is used as a weighting value when determining which bandwidth to receive the moving image. This is a numerical value such as (* 2) or (* 4) attached to BW2, BW3, etc. in FIG.

  Flow information including preference information is created by the video viewing application 21 based on the bandwidth value in the quality information list obtained from the video distribution application 31. Therefore, in particular, in the flow information of the flow 1, the required bandwidth differs depending on the viewing size specified by the user, and the bandwidth value of the flow information changes.

  By the way, when the user specifies a size of 16000 × 9000 pixels in 1/100, that is, 160000 × 90000 pixels in the entire soccer field, and a size of 1/40000, that is, 800 × 450 in the entire soccer field. The bandwidth required for the highest quality image will vary. Along with this, the bandwidth value in the quality information list also changes, so the flow information that the video viewing application 21 passes to the communication management unit 22 changes.

  FIG. 7A shows an example of the flow information on the main screen when a narrow viewing area is designated (when the highest image quality is obtained, such as 8 Mbps). FIG. 7B designates a wide viewing area. This is an example of the flow information of the main screen in the case (such as 30 Mbps when the highest image quality is obtained).

  According to these pieces of flow information, the data flow of the main screen is set such that the source address is IP11, the destination address is IP10, and the destination port is 9080. In addition, these data flows correspond to four types of bandwidths, both the bandwidth required for the lowest quality video is 50 kbps, the bandwidth required for the higher quality video is both 200 kbps, and the higher quality The bandwidth required for the moving image is 2 Mbps, and only the bandwidth required for the highest quality moving image is different. The flow information in FIG. 7A is 8 Mbps, and the flow information in FIG. 7B is 30 Mbps. It is. The bandwidth preference for each quality is set to Must (required), * 2, * 4, and * 6, respectively. “Must”, as the name suggests, is preference information used when this is the minimum requirement.

These bandwidth values are determined by the video viewing application 21 based on the quality information list as shown in FIG. 6 transmitted from the video distribution application 31 based on the size of an image that can be reproduced on the communication terminal 10. To do. Accordingly, flow information as shown in FIG. 7A is created, and the video viewing application 21 notifies the communication management unit 22 of the communication terminal 10.
Further, in the present embodiment, the bandwidth corresponding to the flow of the main screen is four stages, but any number of stages may be used.

  There are also flows other than the data flow of the main screen 23a. This is the data flow of the sub-screens 23b and 23c as shown in FIG. In the example of FIG. 8, the flow information of the flows 2 and 3 both has a source address of IP11 and a destination address of IP10. Flow 2 has a destination port of 9081 and corresponds to two types of quality of 50 kbps and 100 kbps, and each preference level is Must, * 1. The flow 3 has a destination port of 9082, supports only the quality of 30 kbps, and has a preference level of Must. Also regarding these flows, the flow information is passed from the video viewing application 21 to the communication management unit 22.

  An example in which the flow information includes more information as preference information is shown in FIG. In FIG. 9, the preference information includes not only the bandwidth but also information on delay, cost (billing), mobility (cell size when the communication terminal is a mobile terminal), and stability (less packet loss). An example of flow information to be included is given.

The communication management unit 22 that obtains the flow information including the preference information determines the bandwidth to be assigned to each flow, which of the plurality of communication media NIC100 and NIC101 as shown in FIG. A function of notifying the moving image viewing application 21 of the assigned bandwidth. In order to realize this function, communication between the video distribution server 11 and the communication management unit of the communication terminal 10 may or may not be performed.
In the present invention, the communication management unit 22 obtains flow information and determines a bandwidth to be allocated to them. However, the determination method is out of the scope of the invention, and the description is omitted. Further, the communication management unit 22 notifies the video viewing application 21 of the bandwidth allocated to each flow.

  The video viewing application 21 selects quality information such as a designated video based on the bandwidth assigned to each flow notified from the communication management unit 22. The video viewing application 21 should select quality information according to the user's preference, and the communication terminal 10 may be configured to display a user interface for selection, and what to select is preset. It may be. Also, when selecting quality information, there are several options for moving images even with the same bandwidth, that is, the image resolution is large but the fps is small, and the image resolution is small but the fps is large. May be the same band. The moving image viewing application 21 may determine which to select in such a case.

As a result of selecting the quality information, the moving image viewing application 21 can transmit desired moving image information (content) to the moving image distribution server 11.
This content includes information related to the designation of the area of interest (Xm, Ym) and the geographic range of interest of the point of interest (position / player, etc.), the size of the movie on the screen (Xpixel, Ypixel), the movie Can be divided into information related to moving image quality such as codec, fps, and moving image bit rate (bandwidth). The former is notified in the same manner as described above, and the latter quality information is conventionally notified by using SDP (Session Description Protocol) as a call control protocol such as SIP or RTSP.

  What is important here is that the former and the latter are correlated with each other, and the quality information of the latter may change depending on the designation of the former. That is, it is important that the quality information list that can be provided by the moving image distribution server 11 is changed and the quality information selected by the moving image viewing application 21 is changed depending on the size specified by the user.

The moving image distribution application 31 that has received the content notified by the moving image viewing application 21 using SIP, RTSP, or the like distributes the moving image with the optimum content for the user.
Through the above-described process, the user can view a moving image in which a target viewing target and / or viewing area is specified with quality that reflects the network state.

  Here, the example has been described in which one moving image viewing application is selected from the quality information list, but a plurality of moving image viewing applications may be selected and transmitted to the moving image distribution application. FIG. 10 shows an example of quality information when two candidates are selected. This means that one of the two is desired for distribution, and the upper one in the figure is preferred. The moving image distribution server 11 that has received the moving image quality information as shown in FIG. 10 can distribute the moving image according to the above quality because it can be distributed with the quality shown in FIG. By selecting a plurality of pieces of quality information, it is possible to distribute a low-quality moving image even if a high-quality moving image cannot be distributed.

(Second Embodiment)
A second embodiment of the present invention will be described with reference to FIGS. This embodiment will be described with an example of viewing a horse racing video. A schematic diagram of a system configuration example of this embodiment is shown in FIG. 11, and a sequence diagram is shown in FIG. For example, this system includes a communication terminal 10, a moving image distribution server 11, and a plurality of moving image distribution cameras 12a, 12b, 12c,. The communication terminal 10 includes a moving image viewing application 25 and a display unit 26, and IP10 is assigned as an IP address. The moving image distribution server 11 has a moving image distribution application 35 and is assigned IP11 as an IP address. The moving image distribution cameras 12a, 12b, 12c,... Have moving image distribution applications 41a, 41b, 41c,..., And IP12a, IP12b, IP12c,. In the present embodiment, a method that does not use the communication management unit will be described.

  FIG. 12 is a sequence diagram illustrating the flow of moving image distribution in the present embodiment. As in the first embodiment, first, the user instructs the moving image viewing application 25 of the communication terminal 10 to view a moving image (horse racing moving image in the present embodiment). Based on this, the video viewing application 25 requests the video distribution application 35 on the video distribution server 11 to distribute the video. Upon receiving the request, the moving image distribution application 35 distributes the moving image having the lowest quality set in advance to the moving image viewing application 25. As a result, a screen as shown in FIG. 13 is obtained on the display unit 26 of the communication terminal 10.

  FIG. 13 is a diagram illustrating an example of a display unit that displays one main screen and three sub-screens according to the present embodiment. On the main screen 26 a of the display unit 26, a designated moving image based on viewing information such as a viewing area designated by the user on the communication terminal 10 and an attention target is obtained. On the sub screen 26b, a summary image for specifying viewing information is displayed. In the present embodiment, an image simulating a paddock is displayed on the sub screen 26b, and a running horse is displayed with a circle. Also, ● represents that this horse is designated by the user as a target of attention.

  The sub-screen 26c displays the running horse information such as the name of the running horse, winning odds, and the horse weight as a summary explanation image for specifying viewing information. When a part of this information is selected, a running horse corresponding to the selected information is designated as a target of attention. Other odds information is displayed on the sub-screen 26d. The sub screen 26e is an input field used when purchasing a winning horse voting ticket.

A user who obtains such a moving image and image from the moving image distribution server 11 specifies viewing information. As a designation method, there are a method for designating a horse number, a method for designating a circle representing a running horse, and the like. In the example of FIG. 13, the user designates one of the running horses as a target of attention by clicking one of the horses from the sub-screen 26 b.
The moving image viewing application 25 notifies the viewing information specified by the user by the method described above to the moving image distribution application 35 of the moving image distribution server 11. FIG. 14 is an example of viewing information, and shows viewing information when a horse whose horse number is No. 5 is designated as an object of interest and an area of 5 m × 4 m is designated around the horse.

  Regarding the zoom-up method when viewing information is notified from the video viewing application 25, the video may be cut out by a video distribution server, or a video distribution camera that captures a zoomed-up video for each horse may be prepared. Good. In this embodiment, one of the video distribution cameras 12a, 12b, 12c... Is provided for each horse, and the IP address of the video distribution camera provided for the horse designated as the target of attention is transferred to the video viewing application 25. To do. In the present embodiment, the moving image distribution camera provided to the horse designated as the target of attention will be described as the moving image distribution camera 12a.

  After the video distribution server 11 transfers the IP address 12a of the video distribution camera 12a to the video viewing application 25 based on the designated viewing information, the video distribution camera 12a streams the video data of the designated video based on the viewing information. Start with the lowest quality. As a result, the target horse is zoomed up and displayed on the main screen 26a.

  In addition, the moving image distribution camera 12a starts distributing the specified moving image and transmits a quality information list of the specified moving image that can be provided to the moving image viewing application 25. From this quality information list, the moving image viewing application 25 selects a codec and image quality that can be used by itself, and notifies the moving image distribution camera 12a to obtain a designated moving image with a desired quality.

  In this embodiment, since there is no communication management unit, it is assumed that quality selection is performed by setting a usable bandwidth in advance in the video viewing application 25 itself. This means that, for example, whether an optical fiber or ADSL is used for communication of a communication terminal at home is set. The moving image viewing application 25 of the communication terminal 10 selects the quality information to be viewed from the quality information list based on the transfer amount expected on the communication path, the codec that can be decoded by the communication terminal itself, the size of the image that can be displayed, and the like. . The selected quality information is transmitted from the video viewing application 25 to the video distribution application 41a of the video distribution camera 12a, and based on the quality information, the video distribution application 41a distributes a video of appropriate quality to the video viewing application 25. To do.

  The moving image viewing method according to the present invention described above is executed by a computer mounted on a communication terminal, a distribution server, and a distribution camera. For this reason, a program is used that shows a procedure for executing transmission / reception of data between various applications and the communication management unit, and transmission / reception between terminals via various communication media.

It is a schematic diagram of the system configuration example explaining the 1st Embodiment of this invention. FIG. 2 is a sequence diagram of FIG. 1. It is a figure which shows the example of a display at the time of displaying a soccer video. It is a figure which shows the example of viewing information. It is a conceptual diagram of the picked-up image which an image delivery server image | photographs. It is a figure which shows an example of a quality information list. It is a figure which shows the example of the flow information of a main screen. It is a figure which shows an example of the flow information of two sub screens. It is a figure which shows the other example of the flow information of a main screen. It is a figure which shows an example of the quality information at the time of selecting two quality candidates. It is a schematic diagram of the system configuration example explaining the 2nd Embodiment of this invention. FIG. 12 is a sequence diagram of FIG. 11. It is a figure which shows the example of a display at the time of displaying the moving image of a horse race. It is a figure which shows the other example of viewing information. It is a figure which shows the other example of a quality information list.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Communication terminal, 11 ... Movie delivery server, 12a, 12b, 12c ... Movie delivery camera, 21, 25 ... Movie viewing application, 22, 32 ... Communication management part, 23, 26 ... Display part, 23a, 26a ... Main screen , 23b, 23c, 26b, 26c, 26d, 26e ... sub-screen, 31, 35 ... moving image distribution application, 41a, 41b, 41c ... moving image distribution application.

Claims (11)

A video viewing method for viewing video on a communication terminal using a video distribution / viewing system,
The communication terminal receiving an image showing an overview of the viewing video from the video distribution server;
Transmitting viewing information designated by the communication terminal to the video distribution server;
And a step of receiving the designated moving image based on the viewing information from the moving image distribution server by the communication terminal. The communication terminal receiving a quality information list of the designated video that the video distribution server can deliver from the video distribution server;
Transmitting the quality information selected by the communication terminal based on the quality information list to the video distribution server;
The moving image viewing method according to claim 1, further comprising: receiving the designated moving image of the quality selected from the moving image distribution server by the communication terminal. In the communication terminal, creating flow information based on the quality information list, and notifying the flow information from the video viewing application to the communication management unit;
The moving image viewing method according to claim 2, further comprising: a step of notifying the communication viewing section of the bandwidth allocated based on the flow information to the moving image viewing application in the communication terminal. The video viewing method according to any one of claims 1 to 3, wherein the viewing information designated by the communication terminal includes at least a target of attention.   The video viewing method according to any one of claims 1 to 3, wherein the viewing information designated by the communication terminal includes at least a viewing area.   The video viewing method according to any one of claims 1 to 3, wherein the viewing information designated by the communication terminal includes at least both a target object and a viewing area.   The moving image viewing method according to claim 3, wherein the flow information includes at least a necessary band as preference information.   The flow information includes one or more of delay difference information, billing information, packet loss rate information per unit time, and cell information of wireless communication media as preference information. The moving image viewing method according to Item 1. It is a communication terminal used for the moving image viewing method of any one of Claims 1-8,
A summary image display means for displaying an image showing a summary of the viewing video;
A communication terminal comprising: a specified moving image display means for displaying a specified moving image specified by the communication terminal.   The communication terminal according to claim 9, wherein a display unit that displays a screen displayed by the summary image display unit also serves as an input device for inputting viewing information. The program for making a computer perform the process used for implement | achieving the moving image viewing method of any one of Claims 1-8.

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