JP2007200432A - Device and method for creating playlist, device and method for reproducing contents, server, and information processor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To create a playlist by partially overlapping parameters for defining the playlist. <P>SOLUTION: Music contents stored in a music database are allocated according to tempo information as an example of a parameter to create a plurality of playlists. The created playlists are stored in a playlist database. A CPU selects a playlist according to a motion tempo detected by a tempo detection section. Music contents corresponding to the selected playlist are supplied to a decoder amplifier section to be reproduced from a headphone. The plurality of playlists are created so that parameters are partially overlapped between the playlists. For example, between the playlists 2 and 3, 70BPM to 74BPM are overlapped. Even when a motion tempo within a range near the boundary of the playlists is detected, music contents having a tempo almost similar to the detected motion tempo are reproduced. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a playlist creation device, a content playback device, a playlist creation method, a content playback method, a server, and an information processing device.

  Some playback apparatuses that play music content have a function called a playlist that allows a user to freely determine the playback order of a plurality of music contents. Playlists can be edited freely and saved to a file. Therefore, the user can save the playback order of the favorite music content and listen to the music content according to the stored playback order at any time.

  Also, in recent years, there has been a technology for automatically creating a list including contents having common characteristics by dividing music contents based on the characteristics of music contents such as song name, artist name, genre, tempo, release year, and number of playbacks. It has been proposed (see, for example, Patent Document 1 below). This created list is also called a playlist, and a technique for reproducing audio using the playlist has been proposed (see, for example, Patent Document 2 below).

JP 2005-526340 A JP 2005-44391 A

  In recent years, a technique for changing the reproduction mode of music content in accordance with the movement of the user's body has been proposed. Patent Document 3 below describes a playback mode control device that detects the tempo of a user's walking or running and changes the playback speed of music content according to the detected tempo.

Japanese Patent Laying-Open No. 2005-156641

  For example, when a playlist for each release year is created, a playlist composed of music content of the 1970s, a playlist composed of music content of the 80s (hereinafter referred to as playlist A as appropriate), 90s Each playlist is created by dividing the release year at regular intervals, such as a playlist made up of music content (hereinafter referred to as playlist B as appropriate) and a playlist made up of music content from 2000 onwards. Thereby, the user can grasp | ascertain the characteristic of each playlist easily.

  However, when the user wants to listen to music content near the boundary of the playlist, there are the following problems. For example, when the user's memory for the release year of the music content is ambiguous and the user tries to listen to the music content that would have been released around 1990, which is the boundary of the playlist, It is difficult to accurately determine whether the playlist contains music content that the user wants to listen to. Therefore, when the playlist A is selected and the music content corresponding to the playlist A is played back at random, the music content that the user wants to listen to is not necessarily included. In addition, since the playlist A includes music contents of the early 80s, music contents different from the music contents that the user wants to listen to are reproduced, and the user may feel uncomfortable.

  Therefore, an object of the present invention is to select a suitable playlist and provide the user with the content corresponding to the playlist even when the user desires the content at the boundary of the playlist. It is to provide a content reproduction apparatus, a playlist creation method, a content reproduction method, a server, and an information processing apparatus.

In order to solve the above-described problem, the present invention includes a content holding unit that holds a plurality of contents,
A playlist creating unit that allocates a plurality of contents and creates a plurality of playlists divided by parameters defined as one-dimensional changes;
The playlist creation unit is a playlist creation device that creates a plurality of playlists so that parameters partially overlap between at least two playlists.

The present invention also includes a content holding unit that holds a plurality of contents;
A playlist creating unit that allocates a plurality of contents and creates a plurality of playlists divided by parameters defined as one-dimensional changes;
A playback control unit that plays back content corresponding to the created playlist,
The playlist creation unit is a content reproduction device that creates a plurality of playlists so that parameters partially overlap between at least two playlists.

The present invention also includes a content holding step for holding a plurality of contents,
A playlist creation step of allocating a plurality of contents and creating a plurality of playlists divided by parameters defined as one-dimensional changes;
The playlist creation step is a playlist creation method that is a step of creating a plurality of playlists so that parameters partially overlap between at least two playlists.

The present invention also includes a content holding step for holding a plurality of contents,
A playlist creation step of allocating a plurality of contents and creating a plurality of playlists divided by parameters defined as one-dimensional changes;
A playback control step for playing back content corresponding to the created playlist,
The playlist creation step is a content reproduction method that is a step of creating a plurality of playlists so that parameters partially overlap between at least two playlists.

The present invention also includes a content holding unit that holds a plurality of contents;
A playlist creating unit that allocates a plurality of contents and creates a plurality of playlists divided by parameters defined as one-dimensional changes;
A communication means for transmitting the created playlist to another device,
The playlist creation unit is a server that creates a plurality of playlists so that parameters partially overlap between at least two playlists.

The present invention is also an information processing apparatus including playlist acquisition means for receiving a plurality of playlists via communication means,
The plurality of playlists are information processing apparatuses that are divided by parameters defined as one-dimensional changes and are playlists created so that the parameters partially overlap between at least two playlists.

  According to the present invention, when a plurality of playlists are classified by parameters defined as one-dimensional changes such as release year and tempo, the parameters are partially overlapped between at least two playlists. You can create multiple playlists. Further, according to the present invention, even when a user desires content at the boundary of a playlist, an appropriate playlist can be selected and content corresponding to the playlist can be provided.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a configuration of a content reproduction apparatus 1 according to an embodiment of the present invention. A CPU (Central Processing Unit) 3, a ROM (Read Only Memory) 4, a RAM (Random Access Memory) 5, a tempo database (abbreviated as DB in the figure) 6, and a music content database 7 are connected to the bus 2 of the content reproduction apparatus 1. A playlist database 8, a tempo detection unit 9, a display unit 10, an operation input unit 11, a decoder / amplifier unit 12, and a communication unit 13 are connected. The decoder / amplifier unit 12 is connected to a headphone 14. In this embodiment, the content reproduction apparatus 1 is a portable type, and the user can use the content reproduction apparatus 1 to listen to music content while exercising such as walking, running, and gymnastics.

  The configuration of the content reproduction apparatus 1 will be described in detail. The CPU 3, which is an example of a playback control unit, controls each unit of the content playback device 1 by executing a program stored in the ROM 4. Further, as will be described later, the CPU 3 creates a plurality of playlists such that parameters such as tempo partially overlap between at least two playlists. The RAM 5 is used as a work area when the CPU 3 executes a program, and is also used as a means for temporarily storing data generated during each process.

  The tempo database 6 stores the tempo of exercise such as walking and running of the user detected by the tempo detection unit 9 (hereinafter referred to as exercise tempo). When the exercise tempo detected by the tempo detector 9 changes more than a certain value, the exercise tempo stored in the tempo database 6 is changed.

  A music content database 7 which is an example of a content holding unit stores a plurality of music contents in association with meta information. Here, the meta information is data describing the attributes of each music content, and is, for example, the song name, tempo, number of playbacks, genre, performance time, performer, etc. of the music content. In addition to the actual music content data, the music content database 7 also stores, for example, identifiers of music content that can be obtained by accessing the music content distribution server 16. For example, an identifier such as a URL (Uniform Resource Locator) of the music content distribution server 16 is stored.

  The playlist database 8 stores a plurality of playlists created by control by the CPU 3. In one embodiment of the present invention, the playlist database 8 stores a playlist divided by tempo information, which is an example of a parameter defined as a one-dimensional change. Of course, a playlist divided by other parameters such as the release time of the music content defined as one-dimensional change, the recording time when the music content is recorded in the music content database 7, and the total performance time may be stored. . Release time and recording time are defined by year, month and date, for example. The total performance time is defined by minutes and seconds, for example. In addition, a playlist divided by parameters that are not defined as one-dimensional changes such as genre and artist may be stored.

  The tempo database 6, the music content database 7, and the playlist database 8 are preferably configured by a nonvolatile memory such as a hard disk. A storage area of one hard disk may be divided so as to store the tempo, music content, and playlist.

  In addition, the music content database 7 is not limited to a hard disk built in the content reproduction apparatus 1, and may be a semiconductor memory or an optical disk that is detachable from the content reproduction apparatus 1, for example. Further, the music content database 7 is not limited to the one stored in the hard disk or the like built in the content reproduction apparatus 1, but the music content stored in the music content distribution server 16 connected via the communication unit 13. A database may be included.

  The tempo detection unit 9 includes, for example, an acceleration sensor attached to a body such as the main body of the content reproduction apparatus 1, the headphones 14, and the user's waist, and detects the user's exercise tempo. The exercise tempo is defined by the number of steps in which the time interval T from the landing of one step to the landing of the other foot exists on average for a predetermined time, for example, one minute, in other words, the number of steps per minute. Therefore, when exercising such as walking and running at a high speed, the number of steps per minute is large.

  For example, in the case of an adult male, when walking at a moderate pace, it is 105 to 110 steps per minute, and when walking at a fast pace, it is about 120 to 125 steps per minute. The experiment shows that the human exercise tempo is about 60 to 250 (steps / minute), and the tempo in the unconscious walking state is within a variation range of about several percent. Furthermore, it is known that there is an average difference of about 70 in the exercise tempo between normal walking and full power running. These numerical values are established for the same user, differ depending on the user's age, sex, and the like, and there is a number of exercise tempos unique to each user.

  In the music as the music content, the tempo is the length of the beat, that is, the speed of the beat. Here, the beat means a basic rhythm that is struck at equal intervals in the music content, and the beat means each time unit. The length of the beat varies depending on the music content, and may change within the same music content. In this specification, a unit BPM (Beat Per Minute) indicating how many quarter notes are included in one minute on average is used as a tempo unit.

  The tempo detection unit 9 further performs processing corresponding to the tempo of the music in units of BPM from the detected exercise tempo. In this case, the motion tempo and the music tempo may be compared with each other by multiplying an appropriate correction coefficient. The CPU 3 may execute the process for making the exercise tempo correspond to the tempo of the music.

  Note that the tempo detection unit 9 is not limited to an acceleration sensor, and other speed sensors, pressure sensors, body motion acceleration sensors, position sensors, and the like can be used. Alternatively, the user's exercise tempo may be detected from the biological information by detecting biological information such as the user's pulse, skin perspiration, skin resistance, myoelectric potential, and body surface temperature. The tempo detection unit 9 may be separated from the content reproduction device 1 and the exercise tempo may be supplied to the content reproduction device 1 by performing wireless communication with the content reproduction device 1.

  The display unit 10 is configured by, for example, an LCD (Liquid Crystal Display), and various information associated with the operation of the content reproduction apparatus 1 is displayed on the display unit 10. For example, information such as music content playback position information and song title is displayed.

  The operation input unit 11 is a button or the like provided on a case of the content reproduction device 1 or a remote control device connected to the content reproduction device 1 wirelessly or via a wire. The operation input unit 11 can be operated to play, fast forward, rewind, etc. music content. Further, the user can freely create a playlist by operating the operation input unit 11. In addition, the display unit 10 described above may be configured as a touch panel and may be an operation input unit.

  The decoder / amplifier unit 12 decodes (decompresses) music content data supplied from the music content database 7 and compressed by a predetermined compression encoding method. The decrypted music content data is D / A (Digital to Analog) converted, and the data converted into an analog signal is amplified and supplied to the headphones 14. Then, music content is reproduced from the headphones 14.

  The communication unit 13 has both functions of an interface for connection with the music content server 16 and an interface for connection with an external device such as a personal computer. For example, the music content distribution server 16 is connected and communicated via the Internet 15 to download the music content from the music content distribution server 16. The downloaded music content is subjected to file conversion processing and encoding processing as necessary, and the processed music content is stored in the music content database 7 and registered. The content reproduction apparatus 1 can be connected to a personal computer by USB (Universal Serial Bus) of the communication unit 13, for example. Music content ripped from a recording medium such as an optical disk can be transferred from the personal computer to the content reproduction apparatus 1.

  The communication unit 13 is not limited to a wired interface such as USB, but can use a wireless interface such as Bluetooth or IrDA (Infrared Data Association).

  Next, an example of the operation of the content reproduction apparatus 1 will be described. FIG. 2 shows an outline of the operation of the content reproduction apparatus 1. The content reproduction apparatus 1 executes a playlist creation process 21, a playlist selection process 22, and a decode / amplifier process 23. In the playlist creation process 21, a plurality of music contents (schematically shown by individual note symbols in FIG. 2) stored in the music content database 7 are allocated according to the tempo. A playlist is created. In the playlist selection process 22, a predetermined playlist is selected according to a selection signal generated based on the exercise tempo. Then, the music content corresponding to the selected playlist is supplied to the decoder / amplifier unit 12 and the decoding / amplification process 23 is performed, so that the music content is reproduced from the headphones 14.

  Each process will be described in detail. In the playlist creation process 21, music contents stored in the music content database 7 are allocated, and a plurality of playlists are created. Here, in order to facilitate understanding of the present invention, an example of creating a conventional playlist will be described.

  FIG. 3 schematically shows an example of creating a conventional playlist. The histogram in FIG. 3 shows the distribution of the number of music contents having tempos within the respective ranges when the tempo of the music contents is divided from 50 BPM to 10 BPM. For example, among the music contents stored in the music content database 7, the number of music contents having a tempo in the range of 50 to 59 BPM is two, and the number of music contents having a tempo in the range of 60 to 69 BPM. Is 10, and the number of music contents having a tempo within the range of 70 to 79 BPM is twelve. The number of music contents having a tempo in the range of 80 to 89 BPM is seven, and the number of music contents having a tempo in the range of 90 to 99 BPM is four. In order to simplify the description, description of the number of music contents corresponding to tempos in other ranges is omitted.

  As shown in FIG. 3, a plurality of music contents distributed are allocated to create a plurality of playlists. As shown in FIG. 3, music contents M101 and M102 having a tempo in the range of 50 to 59 BPM are allocated to create a playlist 1 ′. In addition, music contents M201 to M210 having a tempo in the range of 60 to 69 BPM are allocated to create a playlist 2 ′. In addition, music contents M301 to M312 having a tempo in the range of 70 to 79 BPM are allocated to create a playlist 3 ′. Similarly, music contents M401 to M407 having a tempo in the range of 80 to 89 BPM are allocated to create a playlist 4 ′, and music contents M501 to M504 having a tempo in the range of 90 to 99 BPM are allocated. A playlist 5 ′ is created.

  A predetermined playlist is selected from the plurality of playlists created as shown in FIG. 3 according to the exercise tempo detected by the tempo detector 9. For example, when the tempo detection unit 9 detects 70 BPM as the exercise tempo, the playlist 3 ′ is selected. The playlist 3 ′ is assigned music content having a tempo in the range of 70 BPM to 79 BPM, and all the music content is equal to or faster than the detected exercise tempo (70 BPM). Music content having For this reason, when the music content corresponding to the playlist 3 ′ is reproduced, the tempo difference between the tempo of the music content and the user's exercise tempo may increase, which may give the user a sense of incongruity.

  Therefore, in the present invention, the tempo ranges characterizing each playlist are partially overlapped between at least two playlists. The histogram shown in FIG. 4 shows the distribution of the number of music contents when the tempo of music content is divided into 50 BPM to 15 BPM, and the tempo ranges characterizing each playlist are partially overlapped. Is.

  For example, between the playlists 1 and 2, the tempo range is divided into 50 to 64 BPM and 60 to 74 BPM, and the range of 60 to 64 BPM is overlapped. Also, between the playlists 2 and 3, the tempo range is divided into 60 to 74 BPM and 70 to 84 BPM, and the range of 70 to 74 BPM is overlapped. The tempo range between other playlists is the same.

  In the histogram of FIG. 4, hatched portions (indicated by reference numerals F1 to F4) indicate the number of music contents corresponding to overlapping tempo ranges. For example, the portion indicated by the reference symbol F <b> 1 indicated by common hatching indicates the number of music contents having a tempo of 60 to 64 BPM in a range overlapping between the playlist 1 and the playlist 2. In this embodiment, F1 = 2, F2 = 4, F3 = 3, and F4 = 2. Playlists 1 to 5 are created according to the tempo ranges thus divided.

  The playlist 1 includes music contents M101 and M102 having a tempo in the range of 50 to 59 BPM, and music contents M201 and M102 having a tempo in the range of 60 to 64 BPM overlapping between the playlist 1 and the playlist 2. M202 is allocated.

  The playlist 2 is assigned music contents M201 and M202 having a tempo in the range of 60 to 64 BPM that overlaps with the playlist 1. The playlist 2 is assigned music contents M203 to M210 having a tempo within a range of 65 to 69 BPM that does not overlap with other playlists. Furthermore, music content M301 to M304 having a tempo within the range of 70 to 74 BPM overlapping with the playlist 3 is allocated to the playlist 2.

  The playlist 3 is assigned music contents M301 to M304 having a tempo in the range of 70 to 74 BPM that overlaps with the playlist 2. The playlist 3 is assigned music contents M305 to M312 having a tempo within a range of 75 to 79 BPM that does not overlap with other playlists. Furthermore, music content M401 to M403 having a tempo within the range of 80 to 84 BPM overlapping with the playlist 4 is allocated to the playlist 3.

  The playlist 4 is assigned music contents M401 to M403 having a tempo in the range of 80 to 84 BPM that overlaps with the playlist 3. The playlist 4 is assigned music contents M404 to M407 having a tempo in the range of 85 to 89 BPM that does not overlap with other playlists. Further, the music content M501 and M502 having a tempo in the range of 90 to 94 BPM overlapping with the playlist 5 is allocated to the playlist 4. In this way, playlists are created such that the tempo ranges that characterize each playlist partially overlap between the playlists. Although other playlists after the playlist 5 are created in the same manner, the description is omitted here.

  There is music content allocated to a plurality of playlists by partially overlapping the tempo ranges that characterize each playlist. For example, music contents M201 and M202 having a tempo in the range of 60 to 64 BPM are allocated to both playlists 1 and 2. Music contents M301 to M304 having a tempo in the range of 70 to 74 BPM are allocated to both playlists 2 and 3. Music contents M401 to M403 having a tempo in the range of 80 to 84 BPM are allocated to both playlists 3 and 4.

  Each playlist created in this way is stored in the playlist database 8. At this time, meta information is added to each playlist so that each playlist can be identified. In this embodiment, meta information TP50 is added to playlist 1, meta information TP60 is added to playlist 2, meta information TP70 is added to playlist 3, and meta information TP80 is added to playlist 4. It is assumed that information is added and meta information of TP90 is added to the playlist 5. Each added meta information is associated with each playlist and stored in the playlist database 8.

  Next, the playlist selection process 22 will be described. The playlist selection process 22 is a process controlled by a selection signal generated by the CPU 3 based on information supplied from the tempo detection unit 9.

  First, a case where the tempo detection unit 9 detects an exercise tempo in a range that does not overlap between playlists will be described. For example, when an exercise tempo within a range of 50 to 59 BPM is detected, the detected exercise tempo is supplied to the CPU 3. Since the exercise tempo supplied from the tempo detection unit 9 is in the range of 50 to 59 BPM, the CPU 3 executes processing for selecting the playlist 1 corresponding to the exercise tempo. That is, a selection signal for selecting a playlist whose meta information is TP50 is generated, and the playlist 1 is selected based on the generated selection signal. When the tempo detection unit 9 detects an exercise tempo within the range of 65 to 69 BPM, the playlist 2 is selected in the same manner. When the tempo detection unit 9 detects an exercise tempo in the range of 75 to 79 BPM, the playlist 3 is selected in the same manner. When the tempo detection unit 9 detects an exercise tempo within the range of 85 to 89 BPM, the playlist 4 is selected in the same manner.

  Next, a case where the tempo detection unit 9 detects an exercise tempo in a range that overlaps between playlists will be described. When an exercise tempo in a range that overlaps between playlists is detected, the detected exercise tempo is compared with the average value of the tempo that characterizes each playlist. Then, a playlist having an average value of tempos closest to the detected exercise tempo is selected.

  For example, the average value of the tempo (60 to 74 BPM) that characterizes the playlist 2 is 67 BPM. The average value of the tempo (70 to 84 BPM) that characterizes the playlist 3 is 77 BPM. When the tempo detection unit 9 detects an exercise tempo of 70 BPM that overlaps between playlists 2 and 3, playlist 2 is selected because it is closer to 67 BPM than 77 BPM. On the other hand, when the motion tempo of 74 BPM is detected by the tempo detection unit 9, the playlist 3 is selected because it is closer to the tempo of 77 BPM than 67 BPM. However, this selection method is an example, and one playlist may be selected using a value other than the average value.

  If the tempo detector 9 detects an exercise tempo of 72 BPM, either the playlist 2 or 3 may be selected. In this case, for example, another criterion such as selecting a playlist having a larger amount of music content may be set, and the playlist may be selected based on the set criterion.

  In the playlist created by the conventional method shown in FIG. 3, when 70 BPM is detected as the exercise tempo, the playlist 3 ′ is selected. The tempo of the music content corresponding to the playlist 3 ′ is 70 to 79 BPM, and only the music content equal to or faster than the detected exercise tempo (70 BPM). On the other hand, in the present invention, when 70 BPM is detected as the exercise tempo, the playlist 2 is selected. The music content corresponding to the playlist 2 has a tempo of 60 to 74 BPM, and many music contents having a detected exercise tempo (70 BPM) and a nearby tempo are included. Therefore, when the music content corresponding to the playlist 2 is played, the difference between the user's exercise tempo and the tempo of the music content to be played does not increase, and the music content more closely matching the exercise tempo is provided to the user. it can.

  In this way, the music contents selected in the playlist selection process 22 are sequentially supplied to the decoder / amplifier unit 12, and the decode / amplifier process 23 is performed. The music content that has been subjected to the decoding / amplification process 23 is supplied to the headphones 14 and reproduced. The playback order when playing back music content corresponding to each playlist may be played back randomly, or may be played back from music content having a tempo close to the detected exercise tempo. Alternatively, the time information (year, month, date, hour, minute, etc.) indicating the time recorded in the music content database 7 may be reproduced in the order of newest.

  FIG. 5 is a flowchart showing the flow of processing controlled by the CPU 3 of the content reproduction apparatus 1 in this embodiment. In step S1, a plurality of playlists are created such that the tempos that characterize each playlist partially overlap. When a plurality of playlists are created, the process proceeds to step S2.

  In step S2, the tempo of the music content to be reproduced is derived from the exercise tempo detected by the tempo detection unit 9. The tempo of the music content to be reproduced is derived by corresponding one-to-one with the detected exercise tempo or multiplying by an appropriate correction coefficient. Next, the process proceeds to step S3.

  In step S3, it is determined whether or not the tempo derived in step S2 falls within a plurality of ranges within the tempo range that characterizes each playlist. In other words, it is determined whether or not the derived tempo is within a partially overlapping tempo range between playlists. In step S3, if the derived tempo falls within the overlapping range, the process proceeds to step S4.

  In step S4, a playlist close to the tempo from which the average tempo that characterizes each playlist is derived is selected from among a plurality of playlists corresponding to the derived tempo. Then, the music content corresponding to the selected playlist is supplied to the decoder / amplifier unit 12. The supplied music content is decrypted, amplified, and reproduced from the headphones 14.

  If the derived tempo does not fall within the overlapping range in step S3, the process proceeds to step S5. In step S5, it is determined whether or not the derived tempo is within the range of one playlist. If it is within the range of one playlist in step S5, the process proceeds to step S6.

  In step S6, a specific playlist corresponding to the derived tempo is selected. Then, the music content corresponding to the selected playlist is supplied to the decoder / amplifier unit 12. The supplied music content is decrypted, amplified, and reproduced from the headphones 14.

  In step S5, if the derived tempo is not within the range of any playlist, the process proceeds to step S7. In step S7, since there is no playlist corresponding to the derived tempo, for example, an error is displayed on the display unit 10. In addition to the display, the user may be notified by sound, vibration, or the like that there is no playlist corresponding to the tempo derived to the user.

  Although one embodiment of the present invention has been specifically described above, the present invention is not limited to the above-described embodiment, and various modifications based on the technical idea of the present invention are possible. .

  In the above-described embodiment, the music content is used as an example of the content. However, the present invention can be applied to content such as other audio, video, game, electronic book, and image content.

  The content reproduction apparatus 1 is not limited to a portable type, and may be a stationary type. The present invention can also be applied to a personal computer having a music content playback function. Furthermore, the present invention is not limited to a playback device dedicated to audio, but also applies to a portable playback device having other functions such as a mobile phone, a PDA (Personal Digital Assistants), a voice recording device, and a digital camera. it can.

  In the above-described embodiment, the parameter defined as a one-dimensional change is described as the tempo. However, the content release time, the recording time when the content is recorded on the hard disk, the total performance time, etc. are used as the parameters. You may do it.

  The present invention may be configured as a playlist creation apparatus that creates a plurality of playlists as in the embodiment described above and does not have a content playback function. Further, as in the above-described embodiment, a plurality of playlists may be created, and the created playlists may be configured as a server that transmits to other devices using communication means. Moreover, you may comprise as information processing apparatuses, such as a personal computer, which has the playlist acquisition means which receives the several play list produced as one embodiment mentioned above and transmitted via a communication means.

  Also, each means constituting the content reproduction apparatus according to the present invention can be constituted by a dedicated hardware circuit, or can be realized by a method or a programmed computer. The program describing the processing contents can be recorded on a computer-readable recording medium such as a magnetic recording device, an optical disk, a magneto-optical disk, or a semiconductor memory.

It is a block diagram which shows the structure of the content reproduction apparatus in one embodiment of this invention. It is a basic diagram which shows the outline | summary of the process of the content reproduction apparatus in one embodiment of this invention. It is a basic diagram for demonstrating the method of producing the play list corresponding to the conventional exercise tempo. It is a basic diagram for demonstrating the method to produce the play list corresponding to the exercise tempo in one embodiment of this invention. It is a flowchart which shows the flow of a process by control of CPU of the content reproduction apparatus in one embodiment of this invention.

Explanation of symbols

1 content playback device 3 CPU
7 Music content database 8 Playlist database 9 Tempo detection unit 12 Decoder / amplifier unit 13 Communication unit 14 Headphone 15 Internet 16 Music content distribution server

Claims (9)

A content holding unit for holding a plurality of contents;
A playlist creation unit that allocates the plurality of contents and creates a plurality of playlists divided by parameters defined as one-dimensional changes;
The playlist creation unit is configured to create the plurality of playlists so that the parameter partially overlaps between at least two playlists. A content holding unit for holding a plurality of contents;
A playlist creating unit for allocating the plurality of contents and creating a plurality of playlists classified by parameters defined as one-dimensional changes;
A playback control unit for playing back content corresponding to the created playlist,
The content reproduction apparatus, wherein the playlist creation unit creates the plurality of playlists so that the parameters partially overlap between at least two playlists. The content playback apparatus according to claim 2, wherein
The content reproduction apparatus, wherein the parameter is a content release time, a content recording time, a tempo, or a total performance time. The content playback apparatus according to claim 3,
Furthermore, a tempo detection unit that detects the user's exercise tempo is provided,
The content reproduction apparatus, wherein the reproduction control unit selects a playlist corresponding to the exercise tempo from among the playlists divided by the tempo, and reproduces content corresponding to the selected playlist. The content playback apparatus according to claim 2, wherein
The content reproduction apparatus, wherein the content is any of music, audio, video, game, electronic book, and image content. A content holding step for holding a plurality of contents;
A playlist creation step of allocating the plurality of contents and creating a plurality of playlists divided by parameters defined as one-dimensional changes;
The playlist creation method is a playlist creation method in which the playlist creation step is a step of creating the plurality of playlists so that the parameters partially overlap between at least two of the playlists. A content holding step for holding a plurality of contents;
A playlist creation step of allocating the plurality of contents and creating a plurality of playlists divided by parameters defined as one-dimensional changes;
A playback control step of playing back the content corresponding to the created playlist,
The content reproduction method, wherein the playlist creation step is a step of creating the plurality of playlists such that the parameters partially overlap between at least two playlists. A content holding unit for holding a plurality of contents;
A playlist creating unit that allocates the plurality of contents and creates a plurality of playlists classified by parameters defined as one-dimensional changes;
Communication means for transmitting the created playlist to another device,
The playlist creation unit is a server that creates the plurality of playlists such that the parameters partially overlap between at least two playlists. An information processing apparatus comprising playlist acquisition means for receiving a plurality of playlists via communication means,
The information processing apparatus is a playlist in which the plurality of playlists are divided by parameters defined as one-dimensional changes, and are created so that the parameters partially overlap between at least two playlists.

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