JP2012089215A - Play list generation device, play list generation method and play list generation program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To generate a play list of contents which enables a user utilizing transportation means to easily recognize arrival at a destination point.SOLUTION: A route searching unit 181 searches a route from a departure point to a destination point by a vehicle of transportation means in response to a user operation, and acquires route information including departure time at the departure point, arrival time at the destination point, and arrival/departure time at a stopover point. A play list generation unit 182 generates a play list of contents to be sequentially reproduced from the departure time at the departure point so as to finish reproduction of the last content within a predetermined time period including the arrival time at the destination point without switching contents while the vehicle stops over at the stopover point.

Description

  The present invention relates to a playlist generation device, a playlist generation method, and a playlist generation program that generate a playlist of contents.

  Conventionally, techniques described in Patent Documents 1 and 2 have been proposed as techniques for controlling the reproduction of content in accordance with a route when a user uses transportation.

  The portable media content reproduction system described in Patent Document 1 reproduces and stops content when a train starts and stops, and selects content from information on the current section and the time required to the next stop when the vehicle stops . As a result, the user can listen to the announcement on arrival at the station while enjoying the content. Thereby, the user can recognize that he / she has arrived at the getting-off station (destination point).

  The content reproduction apparatus described in Patent Document 2 supports user behavior by analyzing and predicting user behavior and reproducing content at an appropriate timing. As a specific example, when a user gets on a train by commuting or the like, the content playback device obtains a list of required times between the stations between the boarding station and the getting-off station, and plays according to the required time between the stations. Generate a list.

JP 2008-219759 A JP 2007-109013 A

  In the techniques described in Patent Documents 1 and 2, the reproduction of content stops at all the stop stations. For this reason, in the techniques described in Patent Documents 1 and 2, the user cannot recognize that the user has arrived at the getting-off station from the train operation state and the content reproduction state, and must confirm an announcement in the vehicle. It was.

  The present invention has been made in view of the above, and a playlist generating apparatus, a playlist generating method, and a playlist that can generate a playlist of contents that allows a user who uses transportation to easily recognize that he or she has arrived at a destination. An object is to provide a generation program.

  According to one aspect of the present invention, a route from a departure point of a vehicle to a destination point in a transportation facility is searched according to a user operation, a departure time from the departure point, an arrival time at the destination point, and a stop point on the way The route search unit (181) for acquiring route information including the arrival and departure times at the time, and using the route information, there is no content switching while the vehicle is stopped at the halfway stop point, and the arrival time at the destination point is determined. A playlist generation unit (182) for generating a playlist of content that is sequentially played back from the departure time from the departure point so that the reproduction of the last content is completed within a predetermined period including A playlist generation device is provided.

  According to another aspect of the present invention, a route from a vehicle departure point to a destination point in a transportation facility is searched according to a user operation, and the departure time from the departure point, the arrival time at the destination point, and a midway stop A route information including a departure / arrival time at a point, and within the predetermined period including the arrival time at the destination point without content switching while the vehicle is stopped at the halfway stop point using the route information. Generating a playlist of contents that are sequentially reproduced from the departure time from the departure point so that the reproduction of the last content is completed.

  According to another aspect of the present invention, a route from a vehicle departure point to a destination point in a transportation facility is searched according to a user operation, and the departure time from the departure point, the arrival time at the destination point, and a midway stop A route information including a departure / arrival time at a point, and within the predetermined period including the arrival time at the destination point without content switching while the vehicle is stopped at the halfway stop point using the route information. A playlist generating program is provided for causing a computer to execute a step of generating a playlist of contents that are sequentially reproduced from the departure time from the departure point so that the reproduction of the last content ends.

  ADVANTAGE OF THE INVENTION According to this invention, the play list of the content which makes it easy to recognize that the user who uses transportation means arrived at the destination point can be produced | generated.

It is a block diagram which shows the structure of the music reproduction apparatus which concerns on embodiment. It is a figure which shows an example of a content list. It is a figure which shows an example of distribution data of the reproduction time of content. It is a figure which shows an example of a play list. It is a figure which shows an example of a route search result. It is a figure which shows an example of the information calculated from a route search result. It is a figure which shows an example of a route information screen. It is a figure which shows an example of a diagram information. It is a flowchart which shows the procedure of the process which produces | generates the play list in the music reproduction apparatus shown in FIG. It is a flowchart which shows the procedure of the process which determines the content reproduced | regenerated at the time of each stop at the music reproduction apparatus shown in FIG. 1, and the reproduction start time of this content. It is a figure for demonstrating the method to determine the reproduction start time of the content reproduced | regenerated at the time of a stop at an intermediate stop station. It is a figure for demonstrating the method to determine the reproduction start time of the content reproduced | regenerated at the time of a stop at an intermediate stop station. It is a flowchart which shows the procedure of the process which determines the content reproduced | regenerated between each stop station in the music reproduction apparatus shown in FIG. It is explanatory drawing of the reproduction time between stop stations. It is explanatory drawing of the evaluation value which determines the number of contents allocated between stop stations. It is explanatory drawing of a cross fade area. It is the figure which showed an example of the play list on the time axis.

  Embodiments of the present invention will be described below with reference to the drawings.

  In the present embodiment, a case where the playlist generation apparatus of the present invention is applied to a portable music playback apparatus will be described. Note that the playlist generation device of the present invention is not limited to a portable music playback device, and can be applied to various electronic devices.

  FIG. 1 is a block diagram showing a configuration of a music playback device according to the present embodiment. As shown in FIG. 1, the music playback device 1 is connected to a route search server 3 and a time server 4 via a network 2.

  The music playback device 1 includes an input unit 11, a communication unit 12, a display unit 13, a content storage unit 14, a playlist storage unit 15, an audio output unit 16, a time information output unit 17, and a control unit 18. With.

  The input unit 11 is an input device device for a user to perform an input operation such as a route search. The input unit 11 outputs an operation signal corresponding to a user operation. The input unit 11 includes various input devices such as a hard button device such as a tact button, a capacitance sensor device, and a pressure-sensitive sensor device.

  The communication unit 12 communicates with the route search server 3 and the time server 4 via the network 2. The communication unit 12 includes a communication device such as a wireless LAN device or a mobile phone.

  The display unit 13 displays route information, a playlist, a content playback state, and the like, which will be described later. The display unit 13 includes a display device device such as a liquid crystal display or an organic EL display.

  The content storage unit 14 stores various audio file information such as WAV, WMA, MP3, and AAC as content. In the present embodiment, the content is music content. Each content stored in the content storage unit 14 is content to be subscribed to a playlist generated by the music playback device 1.

  In addition, the content storage unit 14 stores a content list that is a list of content names and reproduction times of stored content. An example of the content list is shown in FIG. The content storage unit 14 also stores distribution time distribution data of the stored content. An example of this distribution data is shown in FIG. Note that the control unit 18 to be described later performs addition / deletion / modification of the content stored in the content storage unit, but at this time, the control unit 18 also updates the distribution data.

  The playlist storage unit 15 stores the playlist generated by the playlist generation unit 182 described later. As shown in FIG. 4, the playlist indicates the playback order of contents to be played back along the route searched by the user's instruction.

  The content storage unit 14 and the playlist storage unit 15 are composed of a nonvolatile storage device such as a hard disk drive or a flash memory. Note that the content storage unit 14 and the playlist storage unit 15 may be configured by a single storage unit or a plurality of storage units. In addition, the storage unit may be provided outside the music playback device 1, and data stored in the content storage unit 14 or the playlist storage unit 15 may be acquired by communication.

  The audio output unit 16 outputs audio during content playback. The audio output unit 16 includes a microamplifier and a speaker, various terminals such as headphones and LINE OUT, a wireless transmission device, and the like.

  The time information output unit 17 outputs time information indicating the current time to a reproduction operation unit 183 described later. The time information output unit 17 includes a real time clock (RTC) or the like. The time information output unit 17 periodically accesses the time server 4 via the communication unit 12 and the network 2 to synchronize with the current time.

  The control unit 18 controls the overall operation of the music playback device 1. The control unit 18 can be configured as a functional module by a CPU, a ROM that stores a program for operating the CPU, a RAM that is used as a work area of the CPU, and the like. The control unit 18 includes a route search unit 181, a playlist generation unit 182, and a playback operation unit 183.

  When the route search unit 181 receives an operation signal from the input unit 11 according to the input operation of the route search condition by the user, the route search unit 181 transmits a route search request to the route search server 3 via the communication unit 12 and the network 2 to search for a route. A route search result is acquired from the server 3. A specific example of the route search result is shown in FIG. In this embodiment, a railway will be described as an example of transportation. Based on the boarding station (departure point) and the getting-off station (target point) specified by the user as the route search result, the route search unit 181 stops the boarding station, the getting-off station, and the train (vehicle) between them. The arrival time and the departure time at each station (stop point) are acquired. In the example of FIG. 5, the route search unit 181 obtains arrival times and departure times at the stations A, which is the boarding station, E station which is the exit station, and B, C and D stations which are intermediate stops. To do.

  Further, the route search unit 181 calculates a required time from the boarding station to the getting-off station, a required time between the stations, and a stop time at each stop station as shown in FIG. 6 based on the route search result. As described above, the route search unit 181 obtains route information by the route search result and the calculation based on the result. The route information includes the departure and arrival times (departure time and arrival time) at each station from the boarding station to the getting-off station, the time required from the boarding station to the getting-off station, the time required between the stations, and the stoppages on the way Including stop time at.

  In addition, when the route search server 3 holds information on the required time from the boarding station to the getting-off station, the required time between the stations, and the stop time at each stop station, the route search unit 181 stores these information. Instead of calculating from the arrival and departure times at each station, the information may be acquired from the route search server 3.

  Further, the route search unit 181 displays the route information on the display unit 13. For example, the route search unit 181 provides route information to the user by causing the display unit 13 to display a route information screen 20 as shown in FIG.

  The playlist generation unit 182 uses the route information and refers to the content list in the content storage unit 14 to generate a playlist of content that is sequentially played back from the departure time from the boarding station. In the present embodiment, the playlist generation unit 182 does not switch the content while the train is stopped (stopped) at the middle stop of the train, and the last content is reproduced within a predetermined period including the arrival time at the getting-off station. Generate a playlist to finish. The playlist generation unit 182 stores the generated playlist in the playlist storage unit 15. In addition, the playlist generation unit 182 displays the playlist on the display unit 13 when, for example, reproduction of content by the playlist is started.

  Based on the playlist stored in the playlist storage unit 15, the playback operation unit 183 reads and plays the content from the content storage unit 14, and causes the audio output unit 16 to output the audio of the content. The reproduction operation unit 183 performs various reproduction processes such as reproduction, stop, and pause according to a user operation. In addition, the reproduction operation unit 183 displays the content reproduction state on the display unit 13.

  The network 2 is a computer network such as the Internet or a mobile phone network.

  The route search server 3 is a server device that holds the schedule information and operation information list of each railway line as shown in FIG. The route search server 3 searches for a route according to the content of the route search request from the music playback device 1 and transmits the obtained route search result to the music playback device 1.

  The time server 4 is a server device that holds information on the current time. The time server 4 provides the current time information to the music playback device 1 in response to the request.

  Next, an operation for generating a playlist in the music playback device 1 will be described.

  FIG. 9 is a flowchart showing a procedure of processing for generating a playlist in the music playback device 1.

  The process of the flowchart of FIG. 9 starts when the route search unit 181 receives an operation signal from the input unit 11 in accordance with the input operation of the route search condition by the user. The boarding station and the getting-off station are designated as route search conditions. In addition, a condition selected from the departure time of the boarding station, the arrival time of the getting-off station, and other conditions is designated.

  First, in step S <b> 10, the route search unit 181 transmits a route search request including a route search condition designated by a user operation to the route search server 3 via the communication unit 12 and the network 2. The route search server 3 that has received the route search request from the music playback device 1 searches for a route according to the content of the route search request. Then, the route search server 3 transmits the obtained route search result to the music playback device 1. When the route search result corresponding to the route search request is not obtained, the route search server 3 notifies the music playback device 1 to that effect.

  In step S <b> 20, the route search unit 181 determines whether the route search result from the route search server 3 has been successfully acquired. When it is determined that the route search result has been successfully acquired (step S20: YES), the route search unit 181 proceeds to step S30, and when it is determined that the route search result has not been acquired (step S20: NO), the process is performed. finish.

  In step S30, the route search unit 181 determines the required time from the boarding station to the getting-off station, the required time between the stations, and the stop time at each stop station based on the route search result acquired from the route search server 3. calculate. When route information is obtained in this way, the route search unit 181 provides route information to the user by displaying the route information screen 20 as shown in FIG. 7 on the display unit 13.

  In step S40, the playlist generation unit 182 determines the content to be played when the vehicle stops at each halfway stop station. Also, the playlist generation unit 182 determines the playback start time of this content. The playlist generation unit 182 is sufficiently longer than the stop time so that the content is not changed during the stop at each halfway stop station as the content to be played back when stopping at each halfway stop station. Select content that is long enough to finish playing before it arrives. Specific processing in step S40 will be described later.

  Then, in step S50, the playlist generation unit 182 determines content to be played back between the stop stations (between the stop points). When step S50 ends, the process for generating a playlist ends. Specific processing in step S50 will be described later.

  Next, specific processing contents in step S40 in FIG. 9 will be described.

  FIG. 10 is a flowchart showing a procedure of processing for determining the content to be played back at the stop at each halfway stop station and the playback start time of this content in step S40 of FIG.

  First, in step S110, the playlist generation unit 182 determines whether or not content has been assigned to all halfway stops.

  If it is determined that there is a halfway stop station to which no content is assigned (step S110: NO), the playlist generation unit 182 selects one of the halfway stop stations to which no content is assigned in step S120. .

  Next, in step S130, the playlist generation unit 182 selects content to be played when the vehicle stops at the halfway stop station selected in step S120.

  Here, the playlist generation unit 182 calculates a value Tk obtained by multiplying the stop time of the train at the halfway stop station selected in step S120 by a predetermined coefficient K, and extracts content having a playback time equal to or greater than Tk. The predetermined coefficient K may be a value larger than 1. However, when content with a playback time close to the stop time is selected as content played when the vehicle stops at an intermediate stop station, the content may be switched immediately before arrival or immediately after departure. Therefore, a good result is easily obtained when a value of about 1.5 is used as the predetermined coefficient K. However, it is not limited to K = 1.5.

  Next, the playlist generation unit 182 refers to the content list in the content storage unit 14 as illustrated in FIG. 2 and extracts content having a reproduction time equal to or longer than Tk. The set of contents extracted here is Ω.

  Next, the playlist generation unit 182 calculates a value τ obtained by adding the stop time at the halfway stop station selected in step S120 and the required time from the halfway stop station to the next halfway stop station. Then, the playlist generation unit 182 selects one content whose playback time is less than τ for the content included in the set Ω. The playlist generation unit 182 sets the selected content as content that is played back when the vehicle stops at the halfway stop station selected in step S120.

  For example, assume that station B on the route shown in FIG. 5 is selected in step S120. In this case, as shown in FIG. 6, the stop time of the train at station B is 30 seconds. The playlist generation unit 182 extracts content having a reproduction time of Tk = 45 seconds or more obtained by multiplying 30 seconds by K = 1.5 from the content list of the content storage unit 14 to obtain a set of content Ω. On the other hand, since the required time from station B to station C, which is the next stop station, is 7 minutes, τ = 7 minutes 30 seconds. The playlist generation unit 182 selects one content having a playback time of less than τ = 7 minutes and 30 seconds from the set Ω, and sets this content as the content played when the vehicle stops at the station B. As a result, as the content to be played when the vehicle stops at station B, the content having a playback time of 45 seconds or more and less than 7 minutes 30 seconds is selected.

  Note that the content playback time can be adjusted to be shorter by using various playback methods such as crossfading. For this reason, the above-mentioned condition that the reproduction time is less than τ does not necessarily have to be satisfied. In other words, the content that is played when the vehicle stops at the midway stop station may be content with a playback time that is equal to or longer than the time obtained by multiplying the stop time of the train at the midway stop station by a predetermined coefficient greater than 1.

  As described above, the playlist generation unit 182 selects the content to be played when the vehicle stops at the halfway stop station selected in step S120. Note that the playlist generation unit 182 may refer to the usage frequency of the content in the playlist generated in the past stored in the playlist storage unit 15 when selecting the content in step S130. In this case, for example, the playlist generation unit 182 excludes content that is frequently used in the past playlist from selection targets, or preferentially selects content that is not frequently used.

  Next, in step S140, the playlist generation unit 182 determines the playback start time of the content selected in step S130. The playlist generation unit 182 determines the playback start time of the content that is played back when the vehicle stops at a midway stop station before the arrival time at the midway stop station. The reason is to keep the content being played before and after the arrival and departure of the intermediate stop station so that the user does not mistake the intermediate stop station as an exit station.

  A method of determining the content reproduction start time in step S140 will be described with reference to FIG. In FIG. 11, t2 and t3 are the arrival time of the train at an intermediate stop station and the departure time from the intermediate stop station, respectively. T1 and t4 are the reproduction start time and reproduction end time of the content selected in step S130, respectively.

  As described above, at the arrival time t2, the content must be in a playback state. Therefore, as shown in FIG. 11, the playlist generation unit 182 reproduces the playback time so that the time point that has elapsed from the reproduction start time t1 is the arrival time t2 for the time Tb corresponding to the predetermined ratio R to the content reproduction time Ta. A start time t1 is determined. The ratio R is, for example, 30%. However, it is not limited to this value. A fixed predetermined time (for example, 1 minute) may be used instead of the time Tb corresponding to the predetermined ratio R with respect to the reproduction time Ta.

  For example, it is assumed that the content C1 having a playback time of 4 minutes and 45 seconds is selected as the content that is played back when the vehicle stops at station B on the route shown in FIG. The playback time of 4 minutes 45 seconds is a condition for the playback time of the content selected as the content to be played back when stopping at station B described in the description of step S130 (45 seconds or more and less than 7 minutes 30 seconds). Meet. In this case, the time Tb corresponding to 30% of the reproduction time Ta = 4 minutes 45 seconds is 1 minute 25 seconds. Therefore, as shown in FIG. 12, the playlist generation unit 182 determines a time one minute and 25 seconds before the arrival time t2 as the reproduction start time t1 of the content C1.

  When the process of step S140 ends, the playlist generation unit 182 returns to step S110. The playlist generation unit 182 can assign content to be played back at the time of stopping to all the stop stations by repeating steps S110 to S140. Then, in step S110, when the playlist generation unit 182 determines that the content is assigned to all midway stop stations (step S110: YES), the playlist generation unit 182 ends the process of step S40 in FIG.

  Next, specific processing contents in step S50 of FIG. 9 will be described.

  FIG. 13 is a flowchart showing the procedure of the process for determining the content to be played back between the stations at step S50 in FIG.

  First, in step S210, the playlist generation unit 182 determines whether or not it is necessary to acquire content reproduction time distribution data stored in the content storage unit 14. The playlist generation unit 182 determines that the distribution data needs to be acquired when the distribution data has never been acquired in the past or when new content is added to the content storage unit 14. If there is no change in the content stored in the content storage unit 14 as compared to the previous acquisition time, the playlist generation unit 182 determines that it is not necessary to acquire distribution data. When the playlist generation unit 182 determines that the distribution data needs to be acquired (step S210: YES), the play list generation unit 182 proceeds to step S220 and determines that the distribution data need not be acquired (step S210: NO). Proceed to step S230.

  In step S <b> 220, the playlist generation unit 182 acquires content reproduction time distribution data stored in the content storage unit 14. The distribution data is, for example, a histogram showing the distribution of content playback time as shown in FIG. FIG. 3 shows a state in which the reproduction time of the content is normally distributed, but may be a distribution different from the normal distribution. When the playlist generation unit 182 acquires the distribution data, the playlist generation unit 182 proceeds to step S230.

  In step S230, the playlist generation unit 182 determines whether or not the content to be reproduced is assigned to all the stop stations (between each stop point). Here, the distance between the stop stations is between the boarding station and the next halfway stop station, between each halfway stop station, and between the halfway stop station and the dropout station immediately before the stop station.

  When it is determined that there is a stop station to which no content is assigned (step S230: NO), in step S240, the playlist generation unit 182 selects one of the stop stations to which no content is assigned. .

  Next, in step S250, the playlist generation unit 182 calculates the reproduction time of the content between the stop stations selected in step S240 (reproduction time Tp between stop stations). When the playlist generating unit 182 calculates the inter-station reproduction time Tp between two adjacent intermediate stations, the playlist generation unit 182 sets the reproduction end time of the content that is reproduced when the previous intermediate station stops to the subsequent intermediate station. It is calculated by subtracting from the playback start time of the content played back when the vehicle stops.

  This will be described with reference to FIG. In FIG. 14, t6 is the reproduction end time of the content C2 that is reproduced when the station C, which is an intermediate stop, stops. T7 is the reproduction start time of the content C3 that is reproduced when the station D stops, which is the next stop station after the station C. The reproduction end time t6 of the content C2 is later than the arrival time t5 at the train station C, and the reproduction start time t7 of the content C3 is earlier than the departure time t8 from the train D station. In this case, a time obtained by subtracting the reproduction end time t6 of the content C2 from the reproduction start time t7 of the content C3 is a reproduction time Tp between the stop stations between the C station and the D station.

  When calculating the inter-station reproduction time Tp between the boarding station and the next halfway stop station, the playlist generation unit 182 reproduces the departure time from the boarding station when the next halfway stop station stops. It is calculated by subtracting from the content playback start time. In addition, when calculating the inter-stop playback time Tp between the getting-off station and the stop station just before it, the playlist generation unit 182 displays the content that is played when the stop station is stopped before the get-off station. It is calculated by subtracting the playback end time from the arrival time at the disembarking station.

  Next, in step S260, the playlist generation unit 182 determines the number N of contents to be allocated between the stop stations selected in step S240.

  At this time, first, the playlist generation unit 182 obtains a relative cumulative frequency curve 21 as shown in FIG. 15 from the distribution data of the content reproduction time. The relative cumulative frequency curve 21 is obtained by adding the relative frequencies in the distribution data in order from the shorter reproduction time. Then, the playlist generation unit 182 sets the reproduction time corresponding to a predetermined value set in advance for the relative cumulative frequency as the evaluation value Th for assigning the number of contents. The playlist generation unit 182 divides the reproduction time Tp between stop stations calculated in step S250 by the evaluation value Th, and adds the value obtained by adding 1 to the quotient to the number of contents N allocated between the stop stations selected in step S240. decide.

  In the example of FIG. 15, the predetermined value of the relative cumulative frequency is 50%. The playback time of the content corresponding to this relative cumulative frequency of 50% is 4 minutes 30 seconds. This 4 minutes 30 seconds is the evaluation value Th. If the inter-station regeneration time Tp between certain stations is 7 minutes, the quotient obtained by dividing the inter-station regeneration time Tp = 7 minutes by the evaluation value Th = 4 minutes 30 seconds is 1. A value 2 obtained by adding 1 to the quotient is the number N of contents allocated between the stop stations.

  The method for determining the evaluation value Th is not limited to the method using the relative cumulative frequency curve 21 described above. For example, the peak value in the content reproduction time distribution data as shown in FIG. 3 may be used as the evaluation value Th. Further, an average value of reproduction times of all contents stored in the content storage unit 14 may be set as the evaluation value Th.

  Next, in step S270, the playlist generation unit 182 determines whether or not the content number N determined in step S260 is 2 or more. If the playlist generation unit 182 determines that the number is 2 or more (step S270: YES), the play list generation unit 182 proceeds to step S280, and if it is determined that the number is less than 2, that is, 1 (step S270: NO), move on.

  In step S280, the playlist generation unit 182 divides the stop station reproduction time Tp calculated in step S250 by the number of contents N determined in step S260. In the present embodiment, the playlist generation unit 182 equally divides the stop station reproduction time Tp by the number of contents N, and sets the division time to Tp / N.

  Next, in step S290, the playlist generation unit 182 selects content from the content list in the content storage unit 14 based on the division time Tp / N, and allocates it between the stop stations selected in step S240. At this time, the playlist generation unit 182 selects N pieces in order from the content whose reproduction time is close to the division time Tp / N. The playlist generation unit 182 may select the same content in duplicate. Here, it is preferable that the playlist generation unit 182 selects the content so that the total reproduction time of the N content is equal to or longer than the reproduction time Tp between the stop stations. This is because if the total playback time of N contents is less than the playback time between stop stations Tp, playback of content between the stop stations may be interrupted. The playlist generation unit 182 proceeds to step S310 after the process of step S290.

  In step S300, the playlist generation unit 182 selects one content from the content list in the content storage unit 14 based on the inter-stop station reproduction time Tp, and assigns it to the stop stations selected in step S240. At this time, the playlist generation unit 182 selects content having a reproduction time closest to the reproduction time Tp between the stop stations. The content selected here is preferably a content having a reproduction time equal to or longer than the reproduction time between stop stations Tp than a content having a reproduction time less than the reproduction time between stop stations Tp. The reason for this is that, as described in step S290 above, when content with a playback time shorter than the playback time between stop stations Tp is selected, playback of content between the stop stations may be interrupted, which is not preferable. The playlist generation unit 182 proceeds to step S310 after the process of step S300.

  In step S310, the playlist generating unit 182 determines that the total reproduction time of the content allocated between the stopped stations (the reproduction time when one content is allocated in step S300) exceeds the inter-station reproduction time Tp. Determine whether or not. If it is determined that the total playback time of the content allocated between the stopped stations is longer than the playback time Tp between the stopped stations (step S310: YES), the playlist generating unit 182 proceeds to step S320. When it is determined that it has not exceeded (step S310: NO), the playlist generation unit 182 returns to step S230.

  In step S320, the playlist generation unit 182 sets a crossfade section. The cross fade section is a section in which two contents are reproduced simultaneously.

  The cross fade section will be described with reference to FIG.

  When the total content playback time allocated between the stop stations is longer than the stop station playback time Tp, the playlist generation unit 182 can adjust the total content playback time by providing a crossfade section. .

  In the example of FIG. 16, the reproduction time Tp between stop stations is divided into three sections S1, S2, and S3 having an equal length, and contents Ca, Cb, and Cc are allocated thereto. The reproduction start times of the contents Ca, Cb, and Cc are t11, t12, and t14, respectively, and the reproduction end times are t13, t16, and t18, respectively. The reproduction start times t11, t12, and t14 of the contents Ca, Cb, and Cc coincide with the start times of the sections S1, S2, and S3, respectively. The reproduction end time t18 of the content Cc is after the end time t17 of the section S3.

  In this case, the playlist generation unit 182 sets the section 31 from time t12 to t13 as a crossfade section in which the two contents Ca and Cb are played back simultaneously. In addition, the playlist generation unit 182 sets the section 32 from time t14 to t16 as a crossfade section in which the two contents Cb and Cc are reproduced simultaneously. In addition, the playlist generation unit 182 sets the section 33 from time t17 to t18 as a crossfade section in which the content Cc and the next content (not shown) are reproduced simultaneously.

  Here, an upper limit of the length of the crossfade section may be determined. For example, the upper limit of the length of the crossfade interval is 10 seconds, and the interval 32 from time t14 to t16 is longer than 10 seconds. In this case, the playlist generation unit 182 sets a section 34 from time t14 to time t15 10 seconds later as a crossfade section, and after time t15, the content Cb is not reproduced, and only the content Cc is reproduced. And

  FIG. 16 shows an example in which the reproduction start times t11, t12, and t14 of the contents Ca, Cb, and Cc are made to coincide with the start times of the sections S1, S2, and S3, respectively. Also good.

  If the stop station selected in step S240 is between the stop station and the stop station just before the stop station, the arrival time at the stop station is recognized in order for the user to recognize that the stop station has arrived. It is preferable that the playback of the content ends. For this reason, when the total content playback time allocated between the stop stations is longer than the stop station playback time Tp, the playlist generation unit 182 ends the playback of the content at the arrival time at the getting-off station. It is preferable to set the playback start time and the crossfade interval for each content. Further, the playlist generation unit 182 may be set so that the reproduction ends at the arrival time at the disembarking station even in the middle of the content.

  However, the reproduction of the content does not have to end exactly at the arrival time at the getting-off station, and the playlist generating unit 182 reproduces the last content in the playlist within a predetermined period including the arrival time at the getting-off station. It should be finished. The predetermined period including the arrival time at the getting-off station is, for example, a period of (X + Y) seconds from X seconds before the arrival time to the getting-off station to Y seconds after the arrival time. If the playback of the content ends before the arrival time at the getting-off station, the user can be notified that the user has arrived at the getting-off station as soon as possible. The content reproduction may be terminated after the arrival time at. When the reproduction of the content is terminated before the arrival time at the getting-off station, the reproduction of the content is finished at a time after the departure time of the stop station one way before the getting-off station.

  Further, the playlist generating unit 182 may be set to perform fade-out playback when the playback of the last content is finished. For example, the playlist generation unit 182 may be configured to perform fade-out playback for the playback portion of the content after the arrival time at the getting-off station. For example, in FIG. 16, if the time t17 is the arrival time at the getting-off station, the playlist generation unit 182 may set the section 33 as a section for performing fade-out reproduction. If the end point of the section 33 is outside the predetermined period, the playlist generation unit 182 may set so that the portion after the predetermined period has not been reproduced.

  Further, the playlist generation unit 182 may select content specified by a user operation as the last content of the playlist. If it does in this way, a user can be made to recognize an alighting station reliably.

  When the process of step S320 ends, the playlist generation unit 182 returns to step S230. The playlist generation unit 182 can assign content to all the stopped stations by repeating steps S230 to S320. In addition, the order which selects between the stop stations which allocate a content does not ask | require. If the playlist generation unit 182 determines in step S230 that content is allocated between all the stop stations (step S230: YES), the playlist generation unit 182 ends the process of step S50 in FIG.

  As described above, the playlist generation unit 182 generates a playlist. The playlist generation unit 182 stores the generated playlist in the playlist storage unit 15.

  FIG. 17 is a diagram showing an example of a playlist on the time axis. FIG. 17 is an example of a playlist without a crossfade section. In the present embodiment, as shown in FIG. 17, a playlist with no content switching is generated during stoppage at B station, C station, and D station, which are halfway stop stations. FIG. 17 shows an example in which the arrival time at E station, which is a disembarking station, coincides with the reproduction end time of the last content C10.

  When the current time indicated by the time information from the time information output unit 17 is the departure time of the boarding station corresponding to the playlist stored in the playlist storage unit 15, the reproduction operation unit 183 reproduces the content based on the playlist. To start. Based on the playlist, the reproduction operation unit 183 sequentially reads and reproduces the content in the playlist from the content storage unit 14 and causes the audio output unit 16 to output the audio of the content. Note that the playlist generation unit 182 may display the playlist on the display unit 13 when the reproduction of the content by the playlist is started.

  As described above, in the present embodiment, there is no content switching at the time of stopping at a stop station on the way, immediately before and immediately after it, and the reproduction of the content ends within a predetermined period including the arrival time at the stop station. For this reason, the user can easily recognize that the station is the getting-off station when the reproduction of the content is completed upon arrival at the station.

  Further, according to the present embodiment, since the reproduction of the content is not stopped at the stop station, the reproduction of the content can be continued for a long time. This makes it possible for the user to enjoy the content for a longer time.

  In the present embodiment, in step S280 of FIG. 13, the playlist generation unit 182 is equally divided when dividing the reproduction time Tp between the stops by the number of contents N, but it may not be equally divided. Good. For example, the playlist generation unit 182 may set a division ratio at the time of division at random. Thereby, the playlist generation unit 182 can reduce the probability of selecting the same content even when a playlist is generated many times in the same boarding section.

  Further, in the present embodiment, in step S290 of FIG. 13, the playlist generation unit 182 selects from the content whose playback time is close to the division time as the content to be allocated between the stop stations. Not limited to. For example, the playlist generation unit 182 may randomly select content having a reproduction time within a specific range with respect to the division time. Here, the specific range is a range determined based on the division time, such as “a range longer than the division time and shorter than 120% of the division time”. Further, the playlist generating unit 182 may set a crossfade section by randomly selecting content having a playback time longer than the division time without defining a specific range. The same applies to content selection in step S300.

  The present invention includes a program for causing a computer to realize the functions of the above apparatus. This program may be read from a recording medium and loaded into a computer, or may be transmitted via a communication network and loaded into a computer.

DESCRIPTION OF SYMBOLS 1 Music reproducing apparatus 2 Network 3 Path | route search server 4 Time server 11 Input part 12 Communication part 13 Display part 14 Content memory | storage part 15 Playlist memory | storage part 16 Audio | voice output part 17 Time information output part 18 Control part 181 Path | route search part 182 Playlist Generation unit 183 Playback operation unit

Claims (7)

The route from the departure point to the destination point of the vehicle in the transportation system is searched according to the user operation, and the route information including the departure time from the departure point, the arrival time at the destination point, and the arrival and departure times at the halfway stop point is obtained. A route search unit to
Using the route information, the departure of the last content is completed within a predetermined period including the arrival time at the destination point without switching the content while the vehicle is stopped at the halfway stop point. A playlist generation device, comprising: a playlist generation unit that generates a playlist of content that is sequentially played back from a departure time from a point.   The playlist generation apparatus according to claim 1, wherein the playlist generation unit selects the last content according to a user operation.   The playlist generation unit selects content having a playback time longer than the stop time of the vehicle at the halfway stop point as content played at the halfway stop point, and 3. The playlist generation apparatus according to claim 1, wherein the reproduction start time is set before the arrival time at the midway stop point.   4. The play list generation unit according to claim 1, wherein the play list generation unit selects content to be reproduced at the midway stop point with reference to the frequency of use of the content in the play list generated in the past. The play list production | generation apparatus as described in.   5. The playlist generation unit according to claim 1, wherein the playlist generation unit determines the number of contents to be allocated between each stop point based on a reproduction time of one or more contents to be subscribed to the playlist. The playlist generation device according to any one of the preceding claims. The route from the departure point to the destination point of the vehicle in the transportation system is searched according to the user operation, and the route information including the departure time from the departure point, the arrival time at the destination point, and the arrival and departure times at the halfway stop point is obtained. And steps to
Using the route information, the departure of the last content is completed within a predetermined period including the arrival time at the destination point without switching the content while the vehicle is stopped at the halfway stop point. Generating a playlist of contents that are sequentially played back from the departure time from the point. The route from the departure point to the destination point of the vehicle in the transportation system is searched according to the user operation, and the route information including the departure time from the departure point, the arrival time at the destination point, and the arrival and departure times at the halfway stop point is obtained. And steps to
Using the route information, the departure of the last content is completed within a predetermined period including the arrival time at the destination point without switching the content while the vehicle is stopped at the halfway stop point. A playlist generating program for causing a computer to execute a step of generating a playlist of contents that are sequentially played back from a departure time from a point.

Images