JP4200125B2 - Mobile content playback apparatus and mobile body - Google Patents

Description

  The present invention relates to a mobile content playback apparatus for playing back content such as audio and video recorded on a recording medium such as a CD, DVD, hard disk, and memory card, and a mobile body on which the mobile content playback apparatus is mounted. .

  Recently, many automobiles are equipped with content playback devices such as CDs and DVDs, and passengers can watch and enjoy content such as music and movies while moving. In general, these content playback apparatuses have a constant playback speed, and the speed is set to a standard speed at which music, movies, etc. are recorded and fixed on a recording medium at the same speed as when the recording is fixed. Is set.

  By the way, in such a constant speed constant speed reproduction, content reproduction may be completed much earlier than when the automobile arrives at the destination, or content reproduction may not be completed upon arrival. If content playback ends earlier than when it arrives, the passenger will not be able to enjoy the content until it arrives at the destination, and the drive will be bored, or it will be necessary to perform a re-operation for content playback. is there. On the other hand, if the playback of the content does not end upon arrival, the passenger is concerned about the rest of the playback. In order to avoid such a situation, it is necessary to change the playback speed of the content. As a vehicle-mounted playback device capable of changing the playback speed, for example, a vehicle-mounted TV recording / playback device described in Patent Document 1 has been proposed.

  On the other hand, more and more recent automobiles are equipped with a navigation system for setting and guiding an appropriate route to a destination. In a general navigation system, when searching for a route to a destination, the travel distance and arrival time of the route can be obtained.

Japanese Patent Laid-Open No. 2003-244591

  The in-vehicle TV recording / playback device described in Patent Document 1 changes the playback speed when playing back video recorded while the vehicle is running, and does not take into account the time to finish playback. It is not possible to end the playback of the content as it arrives at the destination.

  The present invention has been made in consideration of such problems, and is a mobile content playback apparatus that plays back content such as audio and video recorded on a predetermined recording medium. It is an object of the present invention to provide a mobile content playback apparatus and mobile body that can finish the playback of content in accordance with the arrival time.

A mobile content playback apparatus according to the present invention includes:
A playlist creation means for creating a playlist of all contents to be reproduced in advance by an operation of a passenger of the mobile body;
A navigation unit that includes a destination input unit for inputting a destination and guides a route from the current location to the destination;
An estimated arrival time calculating means for calculating an estimated arrival time of the mobile body from the current location to the destination,
Content reproducing means for reproducing the content according to the playlist;
A playback speed control means for controlling the playback speed of the content to be faster than the standard speed when a standard playback time for playing back all the contents included in the playlist at a standard speed is longer than the expected arrival time;
It is characterized by having.

  In this way, by controlling the content playback speed based on the estimated arrival time and the standard playback time, the content playback time can be appropriately controlled according to the time at which the mobile unit arrives at the destination.

In this case, the playback speed control means, playback time of the content, so as to be within the expected arrival time, but it may also be the playback speed to accelerate than the standard rate.

The reproduction speed control means sets a predetermined threshold speed as a reproduction speed that can be viewed by the viewer, and a reproduction speed necessary for reproducing all the contents included in the playlist within the estimated arrival time is as follows: the time faster than the threshold speed, but it may also be the most a short content of playback time to the deletion from the play list of the content.

A mobile content playback apparatus according to the present invention includes:
Playlist creation means for creating a playlist that prescribes all the contents to be reproduced among a plurality of contents stored in a recording medium in advance by an operation of a passenger of the mobile body;
A navigation unit that includes a destination input unit for inputting a destination and guides a route from the current location to the destination;
An estimated arrival time calculating means for calculating an estimated arrival time of the mobile body from the current location to the destination,
Content reproducing means for reproducing the content according to the playlist;
Content selection means for selecting the content to be played back by the content playback means from the recording medium;
With
The content selection means additionally selects at least one content from the recording medium when a standard reproduction time for reproducing all content included in the playlist at a standard speed is shorter than the expected arrival time. To do.

In this way, by controlling the content playback speed based on the estimated arrival time and the standard playback time, the content playback time can be appropriately controlled according to the time at which the mobile unit arrives at the destination.

The content selection unit may additionally select at least one content from the recording medium when a remaining time after reproduction, which is a difference between the estimated arrival time and the standard reproduction time, is longer than a predetermined time. .

As a result, the processing speed of the content selection means is increased without performing the process of adding the short-time content shorter than the specified time.

As described above , according to the mobile content reproduction apparatus of the present invention, it is possible to finish the content reproduction in accordance with the time when the mobile body arrives at the destination. In addition, it is possible to avoid a situation in which the reproduction of the content is finished much earlier than when it arrives, and the passenger can be satisfied.

  Embodiments of a mobile content playback apparatus and mobile body according to the present invention will be described below with reference to FIGS.

  As shown in FIG. 1, a mobile content playback apparatus 10 according to the present embodiment includes a main part of an instrument panel 14 of an automobile (mobile body) 12, and includes a navigation unit 16 and a media player. Part 18.

  As shown in FIG. 2, the navigation unit 16 recognizes the current location and traveling direction of the automobile 12 based on signals from a GPS (Global Positioning System) 20 and a gyro sensor 22 and is input from the current point by the navigation operation unit 24. The route to the destination can be searched based on the map information recorded on the hard disk (recording medium) 26. The navigation unit 16 can obtain the travel distance to the destination and the estimated arrival time T when searching for the route, and displays the information together with the map information on the monitor 28.

  The estimated arrival time T can be obtained by various methods, for example, T = travel distance / expected travel speed. Further, the route may be divided into a general road and a highway, or a city and a suburb, and the estimated arrival time T may be obtained based on different predicted traveling speeds for each of the sections. Furthermore, information indicating the congestion status of the route may be received by a predetermined communication means, and the predicted traveling speed may be changed based on this information. The calculated estimated arrival time T is also supplied to the media player unit 18.

  The media player unit 18 includes a player operation unit 30, a tray 32, a playlist management unit 34, a content playback unit 36, and a playback speed determination unit 38. The playlist management unit 34 can create the playlist 40 on a predetermined rewritable storage unit.

  A recording medium (CD, DVD, etc.) 42 on which content is recorded is stored in the tray 32 so as to be exchangeable. By operating the player operation unit 30, the content reproduction unit 36 is designated by the playlist management unit 34. The content is read from the recording medium 42 and played back at the playback speed R specified by the playback speed determination unit 38. Examples of the content include acoustic content such as music and language teaching materials, and image content such as a movie. Usually, a plurality of contents are recorded on one recording medium 42.

  The tray 32 reads content information from a pickup unit (not shown) while rotating the recording medium 42 and transmits the content information to the content reproduction unit 36. In the content reproduction unit 36, when the received information is information of the audio content, the audio is output and reproduced as sound from the speaker 44. When the received information is video content, the video is output and reproduced on the monitor 28 and the sound is output from the speaker 44. Reproduce. It is also possible to record content on the hard disk 26. In this case, the content reproduction unit 36 can read and reproduce the content from the hard disk 26.

  When the recording medium 42 is loaded on the tray 32, the playlist management unit 34 examines each content recorded on the recording medium 42 and creates a playlist 40. As will be described later, the playlist 40 is a list in which a list unit 46 indicating the playback time at the standard speed for each content is recorded.

  In addition, the playlist management unit 34 functions to obtain a standard reproduction time P necessary for reproducing all of the contents indicated by each list unit 46 at the standard speed, and the playlist 40 in cooperation with the reproduction speed determination unit 38. The list unit 46 is deleted from or added to the list unit 46.

  The playback speed determination unit 38 sets the playback speed R of the content based on the function of comparing the estimated arrival time T received from the navigation unit 16 with the standard playback time P received from the playlist management unit 34 and the comparison result. A function to control and a function to confirm whether or not the obtained reproduction speed R is a viewable speed.

  In practice, the media player unit 18 includes a CPU (Central Processing Unit) as a main control unit, a ROM (Read Only Memory) as a storage unit, a RAM (Random Access Memory), and the like. A part or all of the program is realized by the CPU reading and executing the program stored in the storage unit.

  Next, a procedure for playing back content recorded on the recording medium 42 using the mobile content playback device 10 configured as described above will be described. In the following description, it is assumed that processing is executed in the order of the step numbers described unless otherwise noted.

  In step S <b> 1 of FIG. 3, the passenger of the automobile 12 loads a predetermined recording medium 42 onto the tray 32. At this time, the playlist management unit 34 creates and records a playlist 40 based on the loaded recording medium 42. As shown in FIG. 4, the play list 40 is a list in which the reproduction time of content is recorded, and is recorded in the order of reproduction by the list unit 46 indicating the reproduction time at the standard speed for each content. Since the reproduction time at the standard speed for each content is recorded in advance on the recording medium 42, this time can be read and used, or may be calculated from the data capacity of each content.

  The playlist 40 can be created by various methods, and the corresponding list units 46 are set in the same order as the standard reproduction order recorded on the recording medium 42 as a standard. Moreover, it is created based on the rules set and selected by the passenger. For example, only content of a predetermined genre is selected and the corresponding list unit 46 is set. Further, by operating the player operation unit 30, the passenger can directly edit the playlist 40.

  In step S <b> 2, the passenger inputs a destination to the navigation unit 16 by operating the navigation operation unit 24. The navigation unit 16 obtains the current location from the GPS 20, searches for the optimum route from the current location to the destination while referring to the map information recorded on the hard disk 26, and displays it on the monitor 28. At this time, the travel distance of the route and the estimated arrival time T0 as an initial value are obtained. Thereafter, the passenger drives the automobile 12 and travels to the destination according to the guidance guidance of the navigation unit 16.

  In step S <b> 3, the passenger operates the player operation unit 30 to give a content reproduction instruction. At this time, the navigation unit 16 obtains an estimated arrival time T from the current time until arrival at the destination, and supplies it to the playlist management unit 34. The estimated arrival time T can be obtained by subtracting the elapsed time from the time when the step S2 is executed until the step S3 is executed from the estimated arrival time T0. Alternatively, the estimated arrival time T0 based on that time may be obtained again and T ← T0.

  In step S <b> 4, the playlist management unit 34 refers to the playlist 40 and calculates a standard reproduction time P necessary for reproducing all contents of the list unit 46 recorded in the playlist 40 at a standard speed.

  In step S5, the playback speed determination unit 38 compares the standard playback time P with the estimated arrival time T. When T <P, the process proceeds to step S6, and when T ≧ P, the process proceeds to step S10.

  In step S <b> 6, the playback speed determination unit 38 calculates a playback speed R for playing back all the contents of the list unit 46 recorded in the playlist 40 before the expected arrival time T. That is, in this case, since T <P, if the content is reproduced at the standard speed, it is not possible to reproduce all the contents by the estimated arrival time T. Therefore, the reproduction speed R is obtained as R ← P / T. The obtained reproduction speed R is R> 1, and reproduction at this reproduction speed R can end reproduction of all contents of the list unit 46 in accordance with the expected arrival time T.

  In step S7, the playback speed determination unit 38 confirms whether or not the playback speed R is within a viewable range. That is, when the reproduction speed R is an excessively large value, the reproduction is too fast and the passenger cannot view the content. Accordingly, the playback speed R is compared with the predetermined threshold Th, and the content playback process after step S8 is performed only when R <Th, and when R ≧ Th, the process proceeds to step S13. Since the processing in step S7 is R = P / T, the branching condition is equivalent to P <T × Th (see FIG. 5).

  In step S <b> 8, the reproduction speed determination unit 38 supplies the obtained reproduction speed R to the content reproduction unit 36.

  In step S9, the content reproduction unit 36 reproduces the content based on the supplied reproduction speed R. At this time, the content playback unit 36 inquires the playlist management unit 34 about the playback order of the content, and plays back the content in the order according to the content of the playlist 40 notified from the playlist management unit 34.

  On the other hand, in step S10 (when the determination in step S5 is T ≧ P), it is confirmed whether or not the post-reproduction remaining time Q obtained by subtracting the standard reproduction time P from the estimated arrival time T is shorter than the specified time S. To do. The specified time S is set to a time shorter than the standard content playback time, and is, for example, about 1 [min]. If Q <S, the process proceeds to step S11. If Q ≧ S, the process proceeds to step S12.

  In step S11, the playback speed determination unit 38 sets the playback speed R to “1”. In this case, the content is played back at a standard speed and can be viewed, and the post-reproduction remaining time Q from the end of the content playback to the arrival at the destination is suppressed to a time shorter than the specified time S. be able to. After step S11, the process proceeds to step S7.

  In step S12 (content selection means), the playlist management unit 34 searches the recording medium 42 for the content whose reproduction time is closest to the post-reproduction remaining time Q, and adds it to the playlist 40 as a list unit 46. At this time, the content to be added may be selected from all the content recorded on the recording medium 42, or may be selected from content not included in the playlist 40 at that time.

  Further, the branch determination process of step S10 does not perform the process of adding a short time content that is less than the prescribed time S in step S12, and can easily escape from the loop process including steps S4, S5, S10, and S12. Thus, the process of adding content can be speeded up.

  For example, as shown in FIG. 4, when the remaining reproduction time Q, which is the difference between the standard reproduction time P indicated by the playlist 40 and the estimated arrival time T, is longer than the specified time S, the selection is made in the step S1. The list unit 46a indicating the content closest to the post-reproduction remaining time Q may be selected from the content that has not been selected and added. Thus, a time Pnew1 obtained by adding the playback time p indicated by the list unit 46a to the standard playback time P is set as a new standard playback time P of the playlist 40.

  Even if the list unit 46a is added, if Pnew1 <T and the post-reproduction remaining time Q is longer than the specified time, step S12 is executed again via steps S4, S5, and S10. A list unit 46 is further added.

  On the other hand, in step S13 (when it is determined in step S7 that the reproduction of the content cannot be viewed), the playlist management unit 34 deletes the one having the shortest reproduction time from the list unit 46 of the playlist 40.

  For example, as shown in FIG. 5, when the standard reproduction time P indicated by the playlist 40 is longer than the time T × Th, the shortest of the list units 46 b, 46 c, 46 d and 46 e constituting the playlist 40. The list unit 46c indicating the reproduction time is deleted, and the list units 46d and 46e are moved up so as to reduce the amount. Thereby, the standard reproduction time P indicated by the playlist 40 is shortened. If the shortened new standard reproduction time P (indicated by Pnew2 in FIG. 5) is still longer than the time T × Th, the process branches again from step S7 to step S13, and the remaining list units 46b, 46d and 46e are left. The list unit 46e indicating the shortest reproduction time is deleted, and the standard reproduction time P is further shortened (indicated as Pnew3 in FIG. 5). In this way, the list units 46a to 46e are sequentially deleted until the standard reproduction time P indicated by the play list 40 is equal to or less than time T × Th.

  After performing the process of step S12 or step S13, the process returns to step S4 and continues.

  Although it is not a main part of the invention, detailed description and illustration are omitted, but a so-called endless loop process in which the content addition process in step S12 and the content deletion process in step S13 are repeatedly executed in sequence. In order to prevent this, a loop end determination unit is provided.

  As described above, in the mobile content playback apparatus 10 and the automobile 12 according to the present embodiment, the list unit 46 recorded in the playlist 40 is deleted or added, and the standard playback time P is the expected arrival time T. By changing the playback speed R, the playback of the content can be terminated in accordance with the time when the automobile 12 arrives at the destination.

  Of course, the medium storing the content to be reproduced is not limited to the recording medium 42 such as a CD and a DVD, but may be the hard disk 26 or the memory card. Further, when the tray 32 can store a plurality of recording media 42 like a CD changer, even if one playlist 40 is created for all of the plurality of recording media 42. Good.

  Further, the playlist 40 may be updated while the automobile 12 is traveling. In other words, the estimated arrival time T does not necessarily match the actual arrival time due to road congestion or the like, so the navigation unit 16 may update the estimated arrival time T during travel. In this case, if the playlist 40 is also updated based on the updated estimated arrival time T, the end time of the content can be made closer to the actual arrival time. At this time, the list unit 46 indicating the content that is being reproduced may be incorporated and set in the playlist 40 so as to indicate the remaining reproduction time.

  The mobile content playback apparatus 10 may have a structure in which the navigation unit 16 and the media player unit 18 are integrated, or may have other functions such as an ETC (Electronic Toll Collection system). .

  It goes without saying that the mobile content reproduction apparatus and mobile body according to the present invention are not limited to the above-described embodiments, and can adopt various configurations without departing from the gist of the present invention.

It is a perspective view which shows the instrument panel vicinity of the content reproduction apparatus for mobile bodies which concerns on this Embodiment, and a motor vehicle. It is a block diagram of the configuration of a mobile content playback apparatus. It is a flowchart which shows the procedure which reproduces | regenerates content using the content reproduction apparatus for mobile bodies. It is a schematic diagram which shows a play list when the estimated arrival time is longer than the standard reproduction time. It is a schematic diagram which shows a play list when the standard reproduction time is longer than the estimated arrival time.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Mobile content reproduction apparatus 12 ... Car 16 ... Navigation part 18 ... Media player part 26 ... Hard disk 28 ... Monitor 32 ... Tray 34 ... Playlist management part 36 ... Content reproduction part 38 ... Reproduction speed judgment part 40 ... Playlist 42 ... Recording medium 44 ... Speakers 46, 46a-46e ... List unit P ... Standard playback time Q ... Remaining time after playback R ... Playback speed S ... Prescribed time T, T0 ... Expected arrival time Th ... Threshold

Claims (5)

A mobile content playback apparatus mounted on a mobile body,
A playlist creating means for creating a playlist of all contents to be reproduced in advance by an operation of a passenger of the mobile body,
A navigation unit that includes a destination input unit for inputting a destination and guides a route from the current location to the destination;
An estimated arrival time calculating means for calculating an estimated arrival time of the mobile body from the current location to the destination,
Content reproducing means for reproducing the content according to the playlist;
A playback speed control means for controlling the playback speed of the content to be faster than the standard speed when a standard playback time for playing back all the contents included in the playlist at a standard speed is longer than the expected arrival time;
A mobile content playback apparatus comprising: The mobile content reproduction apparatus according to claim 1,
The mobile content playback apparatus, wherein the playback speed control means increases the playback speed from the standard speed so that the playback time of the content is within the estimated arrival time. In the mobile content reproduction device according to claim 1 or 2,
The reproduction speed control means includes
Set a predetermined threshold speed as a playback speed that viewers can watch,
When the playback speed necessary for playing back all the contents included in the playlist within the estimated arrival time is faster than the threshold speed, the content with the shortest playback time is deleted from the playlist of the contents. A mobile content playback apparatus. A mobile content playback apparatus mounted on a mobile body,
Playlist creation means for creating a playlist that prescribes all the contents to be reproduced among a plurality of contents stored in a recording medium in advance by an operation of a passenger of the mobile body;
A navigation unit that includes a destination input unit for inputting a destination and guides a route from the current location to the destination;
An estimated arrival time calculating means for calculating an estimated arrival time of the mobile body from the current location to the destination,
Content reproducing means for reproducing the content according to the playlist;
Content selection means for selecting the content to be played back by the content playback means from the recording medium;
With
The content selection means additionally selects at least one content from the recording medium when a standard reproduction time for reproducing all content included in the playlist at a standard speed is shorter than the expected arrival time. A mobile content playback apparatus. The mobile content reproduction apparatus according to claim 4, wherein
The content selection means additionally selects at least one content from the recording medium when a remaining time after reproduction, which is a difference between the estimated arrival time and the standard reproduction time, is longer than a specified time. A mobile content playback apparatus.

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