JP4400217B2 - Content distribution system, content distribution server, and content reproduction terminal - Google Patents

Description

  The present invention is a content distribution system configured such that a content distribution server selects content and distributes the content to a content reproduction terminal, and the content reproduction terminal is configured to select and receive content distributed from the content distribution server. The present invention relates to a content distribution system, a content distribution server and a content reproduction terminal used in the content distribution system.

There is a content distribution system configured such that a content distribution server distributes content to a content reproduction terminal, and the content reproduction terminal receives and reproduces the content distributed from the content distribution server (see, for example, Patent Document 1).
JP 2002-189675 A

  By the way, if the content playback terminal is an in-vehicle terminal, for example, when a vehicle is waiting for a signal at an intersection or is involved in a traffic jam on a highway, the content distribution server distributes the content to the in-vehicle terminal. By receiving the content distributed from the content distribution server and playing it, the user can browse the desired information such as news, weather forecast and stock price during the signal waiting time and traffic jam waiting time, Time and congestion waiting time can be used effectively.

  However, in the above-described Patent Document 1, the content distribution server distributes the content to the in-vehicle terminal without considering the signal waiting time or the traffic congestion waiting time. In some cases, waiting for traffic jams may be resolved, and in that case, it is considered that there is an inconvenience that driving must be resumed while the content is being reproduced.

  The present invention has been made in view of the above-described circumstances, and by eliminating a problem when the content playback terminal plays back the content, the user can surely browse the content from the beginning to the end. The object is to provide a content distribution system, a content distribution server, and a content reproduction terminal that can improve performance.

According to the invention described in claim 1, the content distribution server includes a memory in which a signal cycle and a signal waiting time for a stop section with the signal device as a reference point are databased and stored as a signal waiting time map. When the current position transmitted from the content reproduction terminal is received, the stop section is determined based on the received current position, and the traffic light cycle at that time is determined and stored in the memory. By referring to the signal waiting time map and obtaining the signal waiting time corresponding to the determined stop section and the cycle of the traffic light, it is predicted that the content reproduction terminal will stay in the predetermined area for the signal waiting time. obtained as, satisfying one child playing time of the plurality of contents is within residence estimated time Select the content and distribute it to the content playback terminal, or select two or more content that satisfies the condition that the sum of the playback times of each content is within the estimated residence time and distribute it to the content playback terminal To do.

Therefore, the content reproduction terminal is a vehicle-mounted terminal, a case that signal waiting, the content delivery server obtains between time stoplight, the playback time of the plurality of contents in the signal waiting time Ma以 or to deliver selected by selecting a certain satisfying one content to the in-vehicle terminal, or the sum of each of the reproduction time of the plurality of content satisfies the condition of two or more is in the signal waiting time Ma以 Select content and select and deliver it to the in-vehicle terminal. This makes it possible to signal wait is previously content than is eliminated is reliably reproduced completed, the user can view content in a signal waiting time Ma以 reliably from start to finish, Convenience can be improved.

According to the invention described in claim 2, the content distribution server selects one content having the smallest difference between the reproduction time and the stay prediction time from the plurality of contents and distributes it to the content reproduction terminal, or Two or more contents with the smallest difference between the sum of the reproduction times of each of the plurality of contents and the estimated residence time are selected and distributed to the content reproduction terminal. Thus, the content reproduction terminal is a vehicle-mounted terminal, the content can be reduced as much as possible the free time not play, between the time of signal waiting can be effectively utilized to the maximum.

  According to the third aspect of the present invention, the content distribution server selects a content having a high priority among a plurality of contents and distributes it to the content reproduction terminal. As a result, the user can preferentially browse content with high priority according to his / her preference by setting the priority according to his / her preference, for example.

  According to the invention described in claim 4, the content distribution server selects two or more contents of different genres from among the plurality of contents and distributes them to the content reproduction terminal. Thus, the user does not browse the same genre content continuously, but can view two or more contents of different genres, such as browsing the weather forecast content after browsing the news content, for example. You can browse with priority.

  According to the fifth aspect of the present invention, the content distribution server selects two or more contents each having a uniform reproduction time from among the plurality of contents and distributes the selected contents to the content reproduction terminal. Thereby, for example, the user can browse the content of the professional baseball SE League game results and the content of the Pacific League game results over the same time. You can browse content preferentially.

According to the invention described in claim 6 , the content reproduction terminal communicates with other content reproduction terminals and other terminals, acquires the estimated residence time of the own terminal, and transmits it to the content distribution server. The distribution server receives the estimated residence time transmitted from the content reproduction terminal, thereby acquiring the estimated residence time that the content reproduction terminal is predicted to stay in the predetermined area. Accordingly, the content distribution server can acquire the estimated residence time in cooperation with the content reproduction terminal, and the load on the content distribution server can be suppressed.

  Hereinafter, an embodiment applied to a case where a content reproduction terminal of the present invention is applied to an in-vehicle terminal that can be mounted on a vehicle and the vehicle waits for a signal will be described with reference to the drawings. First, FIG. 1 schematically shows the overall configuration of a content distribution system. The content distribution system 1 includes a content distribution server 2 that distributes content, and an in-vehicle terminal 4 that is mounted on a vehicle 3 and receives content distributed from the content distribution server 2.

  Here, when the content distribution server 2 is installed at the intersection where the traffic signal A is erected and the vehicle 3 is waiting for the traffic signal A, the content distribution server 2 sends the content to the traffic signal A. A case where the signal is distributed to the in-vehicle terminal 4 of the vehicle 3 waiting for the signal will be described. That is, in this embodiment, the area where the vehicle 3 waits for a signal corresponds to the predetermined area referred to in the present invention, and the time that the vehicle 3 is expected to wait for the signal to the traffic light A corresponds to the estimated residence time referred to in the present invention. To do. Note that an access point may be installed at an intersection where the signal A is erected, and the content distributed from the content distribution server 2 may be received by the in-vehicle terminal 4 via the access point.

  The content distribution server 2 includes a controller 5, a wireless communication device 6, an on-demand content database 7, a broadcast content database 8, and a memory 9. The controller 5 includes a CPU, a RAM, a ROM, an I / O bus, and the like, and controls the overall operation of the content distribution server 2 by executing a control program. The wireless communication device 6 forms a narrow wireless communication area of a predetermined range around the traffic light A (an area where the vehicle 3 waits for a signal), and when the in-vehicle terminal 4 enters the narrow wireless communication area, Wireless communication is performed with the in-vehicle terminal 4 based on the control.

The on-demand content database 7, as shown in FIG. 2, genre (field) of the plurality of different on-demand content Co _a to CO _n together are stored are database. In this case, each of the on-demand content Co _a to CO _n, a plurality of on-demand content play time are different from each other are prepared. In other words, for example, the on-demand content Co _a is described as an example. The on-demand content Co _a includes m pieces of on-demand content Co _{a1 to} Co _am having different reproduction times (m is a natural number). The reproduction time here is roughly the time required from the start of reproduction at the in-vehicle terminal 4 to the completion thereof, but is transmitted from the content distribution server 2 and received by the in-vehicle terminal 4. It includes the communication time required until the time required, and the preparation time required for preparation for playback.

Here, a specific example regarding on-demand content will be described. The on-demand content Co _a is content indicating a professional baseball game result, and the on-demand content Co _b is content indicating a weather forecast. , Genres are different from each other. As for the on-demand content Co _a , the on-demand content Co _a1 is a content indicating a match result of only one team specified by the user, and the on-demand content Co _a2 is one of the leagues (securities specified by the user).・ League or Pacific League) is the content that shows the game results of all the teams, and the on-demand content Co _a3 is the content that shows the game results of all the teams of both leagues. Accordingly, the playback times are different from each other.

As shown in FIG. 3, the broadcast content database 8 stores _a plurality of broadcast contents Cb _{a to} Cb _{n of} different genres in a database. Again, each of the broadcast content Cb _a to CB _n, a plurality of broadcast contents reproducing time are different from each other are prepared. That is, for example, when the broadcast content Cb _a will be described as an example, the broadcast content Cb _a, different m playback time with each other (m is a natural number) are prepared is pieces of broadcast content Cb _a1 ~Cb _am.

Here, when describing a specific example with respect to the broadcast content, the broadcast content Cb _a is a content showing a horse race results, broadcast content Cb _b, as that is the content showing the stock, different genre from each other ing. Also, the broadcast content Cb _a broadcast content Cb _a1 is content that shows the race results of only one race specified by the user, the broadcast content Cb _a2 is race results of all races racetracks specified by the user The broadcast content _Cba3 is a content indicating the payout amount in addition to the race results of all the races designated by the user, so that the playback time is mutually determined according to the amount of information. Is different.

  In this case, the contents of on-demand content and broadcast content are not limited to the above-mentioned professional baseball game results, weather forecasts, horse racing results, and stock prices. For example, gourmet information, town guide information, book publication information, etc. The content of on-demand content and the content of broadcast content may overlap.

In the memory 9, as shown in FIG. 4, the signal waiting time for the cycle of the traffic light A and the stop section with the traffic light A as a reference point is databased and stored as a signal waiting time map. Here, “Tb ₁ ” to “Tb ₄ ” indicate the time when the blue lighting time is divided in the cycle of the traffic light A, and “Ty ₁ ” indicates the yellow lighting time of the cycle of the traffic light A. “Tr ₁ ” to “Tr ₄ ” indicate times when the red lighting time is divided in the cycle of the traffic light A. In this case, for example, the signal waiting time of the vehicle 3 stopped in the stop section “D1” at the timing of the traffic light A at “Tb ₁ ” is stored as “Tw ₁₁ ”.

  In this case, the signal waiting time data may be a centrally set value, or may be acquired by statistically measuring the time from when the plurality of vehicles 3 are stopped until the vehicle starts. It may also be one that is constantly updated in consideration of the latest situation. In addition, it is assumed that the vehicle 3 stopped in the stop section away from the traffic light A cannot pass through the intersection during one cycle of the traffic light A (simply moves within the intersection). The above-described signal waiting time may be set in consideration of the above.

  In the configuration described above, the content distribution server 2 is configured to distribute on-demand content on one channel and distribute broadcast content on multiple channels.

  The in-vehicle terminal 4 includes a controller 10, a wireless communication device 11, a GPS receiver 12, a memory 13, a display 14, and a speaker 15. The controller 10 includes a CPU, a RAM, a ROM, an I / O bus, and the like, and controls the overall operation of the in-vehicle terminal 4 by executing a control program. The wireless communication device 11 performs wireless communication with the content distribution server 2 based on the control of the controller 10.

  When the GPS signal transmitted from the GPS satellite 16 is received, the GPS receiver 12 calculates a parameter stored in the received GPS signal and detects the current position of the in-vehicle terminal 4 (vehicle 3). . When the content distributed from the content distribution server 2 is received by the wireless communication device 11, the memory 13 stores the received content. The display 14 displays an image in which the content stored in the memory 13 is reproduced. The speaker 15 outputs a sound in which the content stored in the memory 13 is reproduced.

  In the configuration described above, the wireless communication performed between the content distribution server 2 and the in-vehicle terminal 4 may be, for example, a wireless LAN, infrared communication, Bluetooth (registered trademark) or the like standardized as the IEEE802.11 series. It ’s fine. In addition, the in-vehicle terminal 4 may be partially or entirely configured from a navigation device. The content distribution server 2 is configured to be able to add, update, and delete content by accessing an external server or accessing from an external server. Further, the content distribution server 2 is configured to always transmit a service request signal in order to detect whether or not the vehicle 3 has entered the narrow area wireless communication area.

Next, the operation of the above configuration will be described with reference to FIGS. here,
(1) When content distribution server 2 selects on-demand content and distributes it to in-vehicle terminal 4 (2) When in-vehicle terminal 4 selects and receives broadcast content distributed from content distribution server 2 To do.

(1) In the case where the content distribution server 2 selects on-demand content and distributes it to the in-vehicle terminal 4 First, the case where “the content distribution server 2 selects on-demand content and distributes it to the in-vehicle terminal 4” This will be described with reference to FIGS.

  In the in-vehicle terminal 4, the controller 10 enters the narrow area wireless communication area where the vehicle 3 is formed by the content distribution server 2, and the service request signal transmitted from the content distribution server 2 is received by the wireless communication device 11. The GPS receiver 12 detects the current position (step S1), and the content distribution server 2 receives the terminal ID individually assigned to the terminal itself and the current position detected by the GPS receiver 12 from the wireless communication device 11. To send to.

  In the content distribution server 2, when the wireless communication device 6 receives the terminal ID and the current position transmitted from the in-vehicle terminal 4, the controller 5 determines the stop section based on the received current position ( Step T1), the cycle of the traffic light A at that time is determined (Step T2), the signal waiting time map stored in the memory 4 is referred, and the signal corresponding to the determined stop section and the cycle of the traffic light A A waiting time is acquired (step T3). Then, the controller 5 searches the on-demand content database 7, selects the on-demand content that satisfies the condition that the reproduction time is within the acquired signal waiting time (step T4), and selects the selected on-demand content. Distribution is performed from the wireless communication device 6 to the in-vehicle terminal 4.

  In the in-vehicle terminal 4, when the on-demand content distributed from the content distribution server 2 is received by the wireless communication device 11, the controller 10 reproduces the received on-demand content (Step S <b> 2) and displays an image. The information is displayed on the display 14 or the sound is output from the speaker 15.

  By performing the series of processes described above, the content distribution server 2 selects on-demand content whose playback time is within the signal waiting time from among a plurality of on-demand content, and distributes the selected on-demand content to the in-vehicle terminal 4. When the on-demand content distributed from the content distribution server 2 is received, the terminal 4 reproduces the received on-demand content. Thus, there is no inconvenience that the user must restart the operation while the on-demand content distributed from the content distribution server 2 and received by the in-vehicle terminal 4 is being reproduced. Can be reliably viewed from the beginning to the end within the time waiting for the signal.

Incidentally, in this case, the content distribution server 2 may be configured to select and distribute on-demand content based on the following points among the plurality of on-demand content.
(A) Select and distribute one on-demand content with the smallest difference between playback time and signal waiting time.
(B) Select and distribute two or more on-demand content with the smallest difference between the sum of the playback times and the signal waiting time.
(C) Select and distribute on-demand content with high priority.
(D) Select and distribute two or more on-demand contents of different genres.
(E) Select and distribute two or more on-demand contents with uniform playback times.

Hereinafter, these will be sequentially described with reference to FIG. In this case, description will be made assuming that the playback time of each on-demand content is as shown in FIG. 2 as an example.
(A) When selecting and distributing one on-demand content with the smallest difference between the playback time and the signal waiting time In this case, it is assumed that the content distribution server 2 has acquired “12 seconds” as the signal waiting time, for example. Then, for example, the on-demand content Co _a3 or the on-demand content Co _b3 having a playback time of “12 seconds” is selected and distributed so that the difference between the playback time and the signal waiting time is minimized (see FIG. 6 (a)).

(A) When selecting and distributing two or more on-demand contents with the smallest difference between the sum of the respective reproduction times and the signal waiting time In this case, the content distribution server 2 uses, for example, “12 Assuming that “second” is acquired, for example, the on-demand content Co _a1 whose reproduction time is “3 seconds” and the reproduction time “4” so that the difference between the sum of the reproduction times and the signal waiting time is minimized. "On-demand content Co _c1 that is" seconds "and on-demand content Con ₁ that is" 5 seconds "in playback time are selected and distributed, for example, on-demand content that is" 6 seconds "in playback time Two contents of Co _a2 and on-demand content Co _b2 having a reproduction time of “6 seconds” are selected and distributed (see FIG. 6A).

(C) When on-demand content with high priority is selected and distributed In this case, the content distribution server 2 assigns priorities to the on-demand content stored in the on-demand content database 7, and for example When priority demand content Co _a is assumed to be the highest priority of all the on-demand content, priority within the signal waiting time distribution by selecting the on-demand content Co _a top-priority basis It will be. Note that this priority may be arbitrarily designated by the user, or may be automatically designated by the content distribution server 2, and the content of the on-demand content is highly urgent in reporting, for example. If it is news, the content distribution server 2 may automatically designate the priority of the on-demand content as the highest level.

(D) When two or more on-demand contents of different genres are selected and distributed In this case, assuming that the content distribution server 2 has acquired “12 seconds” as a signal waiting time, for example, within genre is different from each other, for example, the on-demand content Co on-demand content Co of _{a a1} and on-demand on-demand content Co _c1 of on-demand content Co _b1 and on-demand content Co _c of the content Co _b or deliver to select three contents, for example, on-demand content Co on-demand content Co of _{b b1} and on-demand content Co on-demand content Co of _{c c1} and on-demand content Co on-demand content Co _n1 of the _n And three Select the content will be or deliver (see FIG. 6 (d)).

(E) When selecting two or more on-demand contents with the same playback time In this case, assuming that the content distribution server 2 has acquired “12 seconds” as the signal waiting time, for example, playback is performed within the signal waiting time. For example, on-demand content Co _a1 whose playback time is “3 seconds”, on-demand content Co _b1 whose playback time is “3 seconds”, and on-demand content whose playback time is “4 seconds” so that the times are equal. or deliver three selected content with the content Co _c1, for example, playback time playback time and on-demand content Co _a2 is "6 seconds" are on-demand content Co _b2 and two of "6 seconds" Content is selected and distributed (see FIG. 6 (e)).

  A plurality of these conditions may be applied in combination. For example, if the conditions (a) and (e) are combined and applied, the content distribution server 2 will play Two or more on-demand contents are selected and distributed so that the difference between the sum of the times and the signal waiting time is minimized and the reproduction times are equalized.

  By the way, although the content distribution server 2 described above has described the case where the signal waiting time is acquired by referring to the signal waiting time map when the current position transmitted from the in-vehicle terminal 4 is received. As the in-vehicle terminal 4 acquires the signal waiting time, the signal waiting time may be acquired by receiving the signal waiting time transmitted from the in-vehicle terminal 4.

  That is, as shown in FIG. 7, in the in-vehicle terminal 4, the controller 10 enters the narrow area wireless communication area where the vehicle 3 is formed by the content distribution server 2, and the service request signal transmitted from the content distribution server 2. Is received by the wireless communication device 11, for example, vehicle-to-vehicle communication is performed with the in-vehicle terminal 4 mounted on another vehicle 3, or the road-to-vehicle communication with the roadside terminal installed on the roadside is performed. By performing communication, the signal waiting time is acquired (step S11), and the terminal ID and the signal waiting time individually assigned to the own terminal are transmitted from the wireless communication device 11 to the content distribution server 2.

  In the content distribution server 2, the controller 5 acquires the signal waiting time by receiving the terminal ID and the signal waiting time transmitted from the in-vehicle terminal 4 by the wireless communication device 6 (step T11), and the on-demand content The database 7 is searched, on-demand content satisfying the condition that the reproduction time is within the acquired signal waiting time is selected (step T12), and the selected on-demand content is transferred from the wireless communication device 6 to the in-vehicle terminal 4 Let it be delivered.

  In the in-vehicle terminal 4, when the on-demand content distributed from the content distribution server 2 is received by the wireless communication device 11, the controller 10 reproduces the received on-demand content (Step S <b> 12) and displays an image. The information is displayed on the display 14 or the sound is output from the speaker 15.

  As a result of the series of processes described above, the content distribution server 2 also selects the on-demand content whose playback time is within the signal waiting time from the plurality of on-demand content, and sends it to the in-vehicle terminal 4. When the on-demand content distributed from the content distribution server 2 is received, the in-vehicle terminal 4 reproduces the received on-demand content. Thus, there is no inconvenience that the user must restart the operation while the on-demand content distributed from the content distribution server 2 and received by the in-vehicle terminal 4 is being reproduced. Can be reliably viewed from the beginning to the end within the time waiting for the signal.

(2) When the in-vehicle terminal 4 selects and receives broadcast content distributed from the content distribution server 2 Next, “When the in-vehicle terminal 4 selects and receives broadcast content distributed from the content distribution server 2” Will be described with reference to FIGS.

  In this case, in the content distribution server 2, when the controller 5 acquires the signal waiting time with reference to the signal waiting time map stored in the memory 4 (step T3), the acquired signal waiting time is wirelessly communicated. It is transmitted from the machine 6 to the in-vehicle terminal 4.

  In the in-vehicle terminal 4, the controller 10 acquires the signal waiting time when the signal waiting time transmitted from the content distribution server 2 is received by the wireless communication device 11 (step S <b> 21), and the reproduction time is acquired. Broadcast content satisfying a condition that is within the signal waiting time is determined as broadcast content to be received (step S22). Then, the controller 10 selects and receives the broadcast content determined as the broadcast content to be received from among the plurality of broadcast content distributed from the content distribution server 2, and reproduces the received broadcast content (step S23). ), An image is displayed on the display 14, and a sound is output from the speaker 15.

  By performing the series of processes described above, the in-vehicle terminal 4 selects and receives the broad content whose playback time is within the signal waiting time among the plurality of broadcast content distributed from the content distribution server 2, The received broadcast content is reproduced. Thereby, the user does not have the inconvenience that the user must restart the operation while the broadcast content distributed from the content distribution server 2 and received by the in-vehicle terminal 4 is being reproduced. You can reliably browse from the beginning to the end within the waiting time.

  Here, when the content distribution server 2 distributes the broadcast content on multiple channels, the in-vehicle terminal 4 selects and receives the broadcast content distributed on the multi-channel from the content distribution server 2 with reference to FIG. I will explain.

Vehicle terminal 4, the content distribution server 2 is assumed to be periodically deliver the broadcast content Cb _a to CB _c example in channels 1-3, if the time zone shown by a signal waiting time, for example, "T1" will receive determined as a broadcast content to be received broadcast content Cb _b1 is possible to complete the start of the reproduction thereof within the time period.

The in-vehicle terminal 4 receives the broadcast content Cb _b2 or the broadcast content Cb _c1 that can be started and completed within the time zone if the signal waiting time is a time zone indicated by “T2”, for example. The broadcast content to be determined is received. Furthermore, if the signal waiting time is a time zone indicated by “T3”, the in-vehicle terminal 4 transmits the broadcast content Cb _a1 and the broadcast content Cb _b1 that can be started and completed within the time zone. The broadcast content to be received is determined and received.

  Also in this case, the in-vehicle terminal 4 reproduces a plurality of broadcast contents distributed from the content distribution server 2 in the same manner as the case where the content distribution server 2 described above selects and distributes on-demand content. Select and receive one broadcast content with the smallest difference between time and signal waiting time, or select and receive two or more broadcast contents with the smallest difference between the sum of each playback time and signal waiting time Or select and receive broadcast content with a high priority, select and receive two or more broadcast contents of different genres, or select two or more broadcast contents with equal playback times Can be received.

  Also in this case, as shown in FIG. 10, in the in-vehicle terminal 4, for example, the inter-vehicle communication is performed with the in-vehicle terminal 4 mounted on another vehicle, or the road side terminal installed on the road side. The signal waiting time may be acquired by performing road-to-vehicle communication with.

  As described above, according to the present embodiment, when the content distribution server 2 selects on-demand content and distributes it to the in-vehicle terminal 4, the content distribution server 2 acquires the signal waiting time of the vehicle 3, Since the on-demand content satisfying the condition that the playback time is within the signal waiting time is selected from the plurality of on-demand content and distributed to the in-vehicle terminal 4, the on-demand content is surely received before the signal waiting is resolved. Since the reproduction is completed, the user can surely view the on-demand content from the beginning to the end within the signal waiting time, and the convenience can be improved.

  In this case, the content distribution server 2 selects one on-demand content with the smallest difference between the reproduction time and the signal waiting time and distributes it to the in-vehicle terminal 4 or the sum of the reproduction times and the signal waiting time. Since two or more on-demand contents with the smallest difference are selected and distributed to the in-vehicle terminal 4, the in-vehicle terminal 4 can reduce the idle time during which the on-demand contents are not reproduced as much as possible, and the signal waiting time. Can be used as much as possible.

  In addition, since the content distribution server 2 selects on-demand content with high priority and distributes it to the in-vehicle terminal 4, the user can set his / her preference by setting the priority according to his / her preference, for example. It is possible to preferentially browse on-demand content with a high priority according to. In addition, since the content distribution server 2 selects two or more on-demand contents with different genres and distributes them to the in-vehicle terminal 4, the user does not continuously browse the same genre contents, Two or more different contents can be preferentially browsed. Furthermore, since the content distribution server 2 selects two or more contents with equal reproduction times and distributes them to the in-vehicle terminal 4, the user preferentially browses two or more contents with equal reproduction times. Can do.

  Further, when the in-vehicle terminal 4 selects and receives the broadcast content distributed from the content distribution server 2, the in-vehicle terminal 4 acquires the signal waiting time of the vehicle 3, and the plurality of distribution units distributed from the content distribution server 2. Since the broadcast content satisfying the condition that the playback time is within the signal waiting time is selected and received from the broadcast content, the broadcast content is surely completed before the waiting for the signal is canceled, and the user Can reliably view the broadcast content from the beginning to the end within the signal waiting time, and can improve convenience.

The present invention is not limited to the above-described embodiment, and can be modified or expanded as follows.
The configuration may be applied not only when the vehicle is waiting for a signal with respect to the traffic light A but also when the vehicle is waiting for a traffic jam.
The content playback terminal is not limited to an in-vehicle terminal that can be mounted on a vehicle, but may be, for example, a portable information terminal or mobile phone that can be carried by a person. If the configuration is applied to the case, the admission waiting time can be used effectively.

  Even if the operation mode in which the content distribution server selects the on-demand content and distributes it to the in-vehicle terminal and the operation mode in which the in-vehicle terminal selects and receives the broadcast content distributed from the content distribution server are mixed. good. In this case, the user may be configured to be able to select whether on-vehicle content is received by the in-vehicle terminal or broadcast content is received by the in-vehicle terminal, or when the broadcast content is not received by the in-vehicle terminal (free time period) It may be configured to receive on-demand content.

  When the vehicle is moving in an intersection, the playback of on-demand content or broadcast content may be temporarily stopped.

Functional block diagram showing an embodiment of the present invention Diagram showing on-demand content Diagram showing broadcast content Diagram showing signal latency map schematically Sequence Diagram Diagram showing examples of on-demand content selection patterns Figure equivalent to FIG. Figure equivalent to FIG. The figure which shows the example of the selection pattern of broadcast content Figure equivalent to FIG.

Explanation of symbols

In the drawings, 1 is a content distribution system, 2 is a content distribution server, and 4 is an in-vehicle terminal (content reproduction terminal).

Claims (8)

A content distribution system configured such that a content distribution server selects content and distributes it to a content reproduction terminal,
The content distribution server includes a memory in which a signal waiting time with respect to a cycle of a traffic signal and a stop section with the traffic signal as a reference point is databased and stored as a signal waiting time map, and the current position transmitted from the content reproduction terminal is When received, the stop section is determined based on the received current position, the cycle of the traffic light at that time is determined, and the determination is made by referring to the signal waiting time map stored in the memory. By acquiring the signal waiting time corresponding to the stop period and the traffic light cycle, the signal waiting time is obtained as a predicted residence time in which the content reproduction terminal is expected to stay in the predetermined area, and the reproduction time of the plurality of contents is obtained. Select one content that satisfies the condition that is within the estimated residence time and play the content Content that is distributed at the end, or selected from two or more contents satisfying a condition that the sum of the reproduction times is within the estimated residence time among a plurality of contents and distributed to the content reproduction terminal Distribution system. In the content delivery system according to claim 1,
The content distribution server selects one content having the smallest difference between the reproduction time and the estimated residence time from the plurality of contents and distributes the selected content to the content reproduction terminal, or sums the reproduction times of the plurality of contents. And a content reproduction system that selects and distributes two or more contents with the smallest difference between the estimated residence time and the estimated residence time to a content reproduction terminal. In the content delivery system according to claim 1 or 2,
A content distribution system, wherein a content distribution server selects a content having a high priority among a plurality of contents and distributes the selected content to a content reproduction terminal. The content distribution system according to any one of claims 1 to 3,
A content distribution system, wherein a content distribution server selects two or more contents having different genres from a plurality of contents and distributes the selected contents to a content reproduction terminal. The content distribution system according to any one of claims 1 to 4,
A content distribution system, wherein a content distribution server selects two or more contents having a uniform reproduction time among a plurality of contents and distributes the selected contents to a content reproduction terminal. The content distribution system according to any one of claims 1 to 5,
The content playback terminal communicates with other content playback terminals and other terminals to acquire the estimated residence time of its own terminal, and transmits it to the content distribution server.
The content distribution system, wherein the content distribution server receives the estimated residence time transmitted from the content reproduction terminal, and acquires the estimated residence time that the content reproduction terminal is predicted to stay in a predetermined area. Content distribution server used in a content distribution system as claimed in any one of claims 1 to 6. A content reproduction terminal used in the content distribution system according to claim 1 .

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