JP2004086189A - Musical piece retrieval system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a musical piece retrieval system which enables a user to easily listen to music meeting situations. <P>SOLUTION: The musical piece retrieval system for performing retrieval of musical pieces is provided with a musical piece data storage section 19, a position acquiring section 16, a parameter conversion section 17, a musical piece retrieval section 20, and a reproducing section 15. The storage section 19 coordinates a plurality of musical piece data and musical piece parameters and stores the same. The acquiring section 16 acquires the situation parameters. The conversion section 17 converts the situation parameters acquired by the acquiring section 16 to musical piece parameters. The retrieval section 20 performs the retrieval of the musical pieces stored into the storage section 19 by using the musical piece parameters converted by the conversion section 17 and selects the musical pieces to be reproduced. The reproducing section 15 reproduces the musical pieces selected by the retrieval section 20. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a music search system and method, and more particularly, to a music search system that searches for a music that a user wants to hear according to a situation.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in the field of car audio and the like, a technology for automatically reproducing music according to the situation at the place has been considered. For example, there is a technique of playing music from a music source (for example, a CD, a radio, a cassette tape, or the like) specified in advance according to route information or car position information (for example, see Patent Document 1). In this technique, a user previously associates route information, a position of a vehicle, and a music source from which music is to be reproduced.
[0003]
FIG. 21 is a diagram showing a configuration of a conventional music playback device. The music playback device includes a position acquisition unit 91, a source selection unit 92, a position-source correspondence table 93, a source switching unit 94, and a playback unit 95. The position acquisition unit 91 acquires information on the current position of the vehicle. The source selection unit 92 refers to the position-source correspondence table 93 and selects a music source to be reproduced based on the information on the current position acquired by the position acquisition unit 91. In the position-source correspondence table 93, position information is associated with a position indicated by the position information and a music source to be selected near the position. The source switching unit 94 receives a music signal from each music source and outputs a signal from the music source selected by the source selection unit 92 to the reproduction unit 95. The reproduction unit 95 reproduces the input music signal.
[0004]
In the music reproducing apparatus shown in FIG. 21, when the vehicle reaches a position associated with a music source, one of a plurality of music sources, for example, a CD, a radio, a cassette tape, or the like is selected, and the selected music source is selected. Will play the music. This allows the user to automatically play music according to the situation. For example, the user can automatically listen to CD music while driving along the sea, listen to the radio when entering the city, and so on. Further, by setting the position of the vehicle and the music source in music units, for example, when driving along the sea, it is possible to set so that music that matches the sea is reproduced.
[0005]
[Patent Document 1]
JP-A-8-63946
[0006]
[Problems to be solved by the invention]
In the above technique, the user has to set a position and a music source to be reproduced at the position in advance. Therefore, in order to set the music to be reproduced according to the situation, the user has to check in advance the music to be reproduced. In other words, in the setting operation, the user has to determine whether or not each piece of music is suitable for the situation. As described above, in the above technique, the setting work of the user is complicated, and the burden on the user is large.
[0007]
Therefore, an object of the present invention is to provide a music search system that can easily listen to music that matches a situation.
[0008]
Means for Solving the Problems and Effects of the Invention
In order to achieve the above object, the present invention has the following features. That is, the present invention is a music search system for searching for music, and includes a music data storage unit, a status acquisition unit, a parameter conversion unit, a music search unit, and a playback unit. The music data storage unit stores a plurality of music data and music parameters indicating characteristics of the music in association with each other. The situation acquisition unit acquires a situation parameter indicating a situation around the user. The parameter conversion unit converts the situation parameters acquired by the situation acquisition unit into music parameters. The music search unit searches for music stored in the music data storage unit using the music parameters converted by the parameter conversion unit, and selects music to be reproduced. The reproduction unit reproduces the music selected by the music search unit.
[0009]
According to the above, the situation parameters are converted into music parameters, and music search is performed using the music parameters. Therefore, a music piece that reflects the situation parameters is selected as a search result, and a music piece that matches the situation can be reproduced. Furthermore, since the search is performed by the music parameter, the user does not need to specify a specific music in advance. Therefore, complicated setting work is not required, and the user can easily listen to music suitable for the situation.
[0010]
The music parameter may be an impression value obtained by quantifying the impression received by the listener for the music. By using an impression value that is easy for the user to understand, operations such as changing settings are facilitated.
[0011]
The music search system may further include a conversion table storage unit that stores a conversion table in which the situation parameters are associated with the music parameters. At this time, the parameter conversion unit converts the situation parameters into music parameters using the conversion table. Thereby, the conversion from the situation parameters to the music parameters can be easily performed.
[0012]
Further, the music search system may further include a record receiving unit and a correspondence recording unit. The recording receiving unit receives a recording instruction from a user. When the recording receiving unit receives the recording instruction while the music is being reproduced by the reproducing unit, the corresponding recording unit adds a set of the music parameter of the music being reproduced and the current situation parameter to the conversion table. This allows the user to add a correspondence between the situation and the music desired to be heard in the situation. In addition, since the above-described correspondence can be added to the current situation of the user, if the user determines that the music being played at that time matches the situation at that time, the user can compare the music at that time with the situation at that time. What is necessary is just to add correspondence to a conversion table. Therefore, the user can easily perform the addition processing to the conversion table.
[0013]
When the music search system is mounted on a moving object, the situation parameter may be a movement parameter indicating a moving state of the moving object moving with the user. The movement parameter is a concept including the position of the moving object and the speed of the moving object. The movement parameter has a great influence on the situation around the user. If the movement parameter changes, the situation around the user also changes, and the music that matches the situation also changes. Therefore, by using the movement parameter as the situation parameter, it is possible to appropriately search for a music piece that matches the situation.
[0014]
Further, the movement parameter may be position coordinates indicating the position of the moving object. At this time, the music search system may further include a position table storage unit and an impression value table storage unit. The position table storage unit stores a position table in which the position coordinates are associated with a position category representing a feature of the position indicated by the position coordinates. The impression value table storage unit stores an impression value table in which a position category is associated with an impression value of a song to be reproduced in the position category. The parameter conversion unit converts the position coordinates obtained by the situation obtaining unit into a corresponding position category using the position table, and the position category conversion unit converts the position coordinates using the impression value table. An impression value conversion unit that converts the position category into a corresponding impression value.
[0015]
According to the above, the position coordinates, which are the situation parameters, are converted into position categories, and then converted into impression values. Since the position category is an expression that is easy for humans to understand, such as “highway” or “park”, for example, it is very easy for the user to change the impression value table. Therefore, the user can easily change the settings of the music search system by changing the impression value table.
[0016]
When the movement parameter is position coordinates indicating the position of the moving object, the following may be performed. That is, the music search system may further include an impression word table storage unit and an impression value table storage unit. The impression word table storage unit stores an impression word table in which position coordinates are associated with impression words expressing an impression of a music piece to be reproduced at a position indicated by the position coordinates. The impression value table storage stores an impression value table in which impression words and impression values are associated with each other. The parameter conversion unit converts the position coordinates acquired by the situation acquisition unit into a corresponding impression word by using the impression word table, and is converted by the impression word conversion unit by using the impression value table. And a corresponding impression value conversion unit for converting the impression word into a corresponding impression value.
[0017]
According to the above, the position coordinates, which are the situation parameters, are converted into impression words and then into impression values. Impression words are expressions that are easy for humans to understand, such as “light songs” and “calm songs”, so that it is very easy for the user to change the impression word table. Therefore, the user can easily change the settings of the music search system by changing the impression word table.
[0018]
When the movement parameter is position coordinates indicating the position of the moving object, the following may be performed. That is, the music search system may further include a position table storage, an impression word table storage, and an impression value table storage. The position table storage unit stores a position table in which the position coordinates are associated with a position category representing a feature of the position indicated by the position coordinates. The impression word table storage unit stores an impression word table in which a position category is associated with an impression word expressing an impression of a song to be reproduced at a position represented by the position category. The impression value table storage stores an impression value table in which impression words and impression values are associated with each other. The parameter conversion unit includes a position category conversion unit, an impression word conversion unit, and an impression value conversion unit. The position category conversion unit converts the position coordinates acquired by the situation acquisition unit into a corresponding position category using the position table. The impression word conversion unit converts the position category converted by the position category conversion unit into a corresponding impression word using the impression word table. The impression value conversion unit converts the position category converted by the position category conversion unit into a corresponding impression value using the impression value table.
[0019]
According to the above, the position category and the impression word are used at the time of conversion from the situation parameter to the impression value, so that the user can change the setting of the music search system by changing the impression word table and / or the impression value table. Can be easily changed.
[0020]
The music search system may further include a route generation unit, a point determination unit, and a list creation unit. The route generator generates a route between two predetermined points. The point determination unit determines a predetermined point on the route. The list creation unit creates a list of the songs selected by the song search unit. At this time, the situation obtaining unit obtains the position coordinates of the predetermined point as the situation parameters. The reproducing unit reproduces the music according to the list.
[0021]
According to the above, for a point on the route, it is possible to search in advance for a song that matches the situation at that point. Therefore, there is no need to perform music search processing while actually moving on the route, so that the processing load of the music search system during movement of the route can be reduced.
[0022]
Further, the music search system may include a mobile terminal and a server that can communicate with the mobile terminal. At this time, the mobile terminal includes a status acquisition unit and a playback unit. The server includes a music data storage unit, a parameter conversion unit, and a music search unit. Then, the situation acquisition unit transmits the acquired situation parameters to the server. The parameter conversion unit converts the situation parameters transmitted from the situation acquisition unit into music parameters. The music search unit transmits the data of the selected music to the mobile terminal. The playback unit receives the music data transmitted from the music search unit and plays the music.
[0023]
According to the above, it is not necessary for the mobile terminal to perform a music search process, so that the processing load on the mobile terminal can be reduced. Further, the music data is stored in a server that can generally store data of a large number of music, so that the music to be searched can be compared with the case where the music is stored in the mobile terminal. Can be greatly increased. Therefore, the range of songs selected as songs suitable for the situation is expanded, and more songs can be provided to the user.
[0024]
Further, the music data storage unit may store a music ID for identifying a music in association with music data. At this time, the music search system is configured to include a mobile terminal and a server that can communicate with the mobile terminal. At this time, the mobile terminal includes a music data storage unit, a status acquisition unit, and a playback unit. The server includes a parameter conversion unit, a music search unit, and a server-side data storage unit. The server-side data storage unit stores at least information having the same content as the content stored in the music data storage unit. Then, the situation acquisition unit transmits the acquired situation parameters to the server. The parameter conversion unit converts the situation parameters transmitted from the situation acquisition unit into music parameters. The music search unit transmits a music ID for identifying the selected music to the mobile terminal. The reproduction unit reproduces the music indicated by the music ID transmitted from the music search unit.
[0025]
According to the above, it is not necessary for the mobile terminal to perform a music search process, so that the processing load on the mobile terminal can be reduced. Further, since there is no need to transmit music data from the server to the mobile terminal, the communication amount between the server and the mobile terminal can be reduced.
[0026]
The music search system according to the present invention can be realized by a program, and can be easily implemented by another independent computer system by recording and transferring the program on a recording medium.
[0027]
BEST MODE FOR CARRYING OUT THE INVENTION
(Embodiment 1)
FIG. 1 is a block diagram showing a configuration of the music search system according to the first embodiment. In the first embodiment, the music search system is realized as one function of a car navigation system. However, the present system may be a dedicated device. 1, the music search system includes a storage device 1, a CPU 2, a display device 3, an audio output device 4, an input unit 5, a signal processing unit 6, and a communication control unit 7. Further, the signal processing unit 6 is connected to the GPS receiver 8.
[0028]
The storage device 1 is an HDD, a memory, or the like, and stores various data. Note that the storage device 1 also includes an external recording medium such as a music CD. The CPU 2 performs various processes such as a music search process described later by a predetermined program. The display device 3 is, for example, a liquid crystal display and displays a map or the like. The audio output device 4 includes an amplifier, a speaker, and the like, and is used for audio guidance during route guidance and reproduces music. The input unit 5 includes buttons, a remote controller, and the like, and receives various inputs from a user. The signal processing unit 6 receives a signal from the GPS receiver 8 and outputs current position information to the CPU 2. The GPS receiver 8 receives GPS radio waves via an antenna or the like mounted on the vehicle, and outputs latitude / longitude information indicating the current position of the vehicle to the signal processing unit 6. The communication control unit 7 is an interface for establishing communication with the Internet network. Typically, the communication control unit 7 is connected to the Internet via a communication terminal (not shown) such as a mobile phone. In the first embodiment, the present system is configured to be mounted on a vehicle as a car navigation system. However, the present invention is not limited to this mode, and may be realized as one function of a mobile terminal held by a user, for example.
[0029]
FIG. 2 is a block diagram showing a functional configuration of the music search system according to the first embodiment. 2, the music search system includes a music data storage unit 19, a position acquisition unit 16, a parameter conversion unit 17, a conversion table storage unit 18, a music search unit 20, a reproduction unit 15, an impression value calculation unit 11 is provided. The music search section 20 includes an impression value search section 13 and a music selection section 14. The music data storage unit 19 includes a music database 10 and an impression value database 12. Here, the music database 10, the impression value database 12, and the conversion table storage unit 18 are realized by the storage device 1. The position acquisition unit 16, the parameter conversion unit 17, the music search unit 20, and the impression value calculation unit 11 are realized by the CPU 2 performing a predetermined program operation. The reproduction unit 15 is realized by the audio output unit 4.
[0030]
First, the outline of the configuration in FIG. 2 will be described. The music data storage unit 19 stores a plurality of music data and music parameters in association with each other. Here, the song parameter is a parameter indicating a feature of the song, and is a concept including an impression value and a feature amount described later. The position acquisition unit 16 acquires information on the current position of the vehicle from the GPS receiver 8. Here, the music search system is not limited to the information on the current position, and may be any system that obtains information indicating the situation around the user. Note that a parameter indicating a situation around the user is called a situation parameter. As the situation parameters, parameters such as the speed of the vehicle, the surrounding noise, the temperature, the pulse of the user, the surrounding brightness, and the altitude of the current position can be considered. The parameter conversion unit 17 converts the information on the current position acquired by the position acquisition unit 16 into music parameters. The music search unit 20 searches for music stored in the music data storage unit 19 using the music parameters converted by the parameter conversion unit 17, and selects music to be reproduced. The reproduction unit 15 reproduces the music selected by the music search unit 20. Hereinafter, details of each unit will be described.
[0031]
The music database 10 is configured by the storage device 1 described above, and stores music signals for a plurality of music pieces. For these music signals, desired music signal data is called out by a song ID (for example, song name or song number) for identifying the song. These music signals are stored, for example, as waveform data by linear PCM or compressed data such as AAC.
[0032]
The impression value calculation unit 11 calculates an impression value for a song stored in the song database 10. Specifically, the physical feature of the music signal input from the music database 10 is analyzed, and an impression value obtained by weighting and adding the feature is calculated. The physical feature amount includes a spectrum change degree (a degree of spectrum change between frames of a predetermined time length), an average number of pronunciations (sounding frequency of a sound pronounced in a music piece), and a sound non-periodicity (in a music piece) , The beat cycle (time length equivalent to a quarter note of the music), the beat cycle ratio (the sound equivalent to the quarter note of the music, and the sound that is predominantly sounded) , The first beat intensity (the intensity of a sound that is pronounced at a cycle corresponding to approximately half of the beat period), and the second beat intensity (at a period corresponding to approximately 1/4 of the beat period) The intensity of the sound that is present, the beat intensity ratio (the ratio of the first beat intensity to the second beat intensity), and the like are analyzed. The impression value calculation unit 11 performs predetermined weighted addition on these feature amounts obtained by the analysis to calculate an impression value. The number of impression values is one or more, generally two to five. When there are two impression values, the music can be represented as a point in a two-dimensional space. In the five cases, the music is represented as a point in a five-dimensional space. That is, the music stored in the music database 10 has the coordinate values of each impression value in this space. Therefore, each music stored in the music database 10 can be distinguished and determined by the set of these impression values.
[0033]
The impression value is an index value that represents a feeling or emotion that a person feels when listening to music, such as intenseness, dynamism, exhilaration, simplicity, and softness. Each impression value can be represented as a linear or non-linear function of the plurality of types of feature amounts. If five types of impression values of intenseness, dynamism, exhilaration, simplicity, and softness are used, a musical piece is represented as a point in a five-dimensional space. Furthermore, the two factors of intenseness and dynamism are integrated into an active factor, and the three factors of exhilaration, naiveness, and softness are integrated into an emotional factor. The music is represented as a point in a two-dimensional space. Such a spatial coordinate system representing an impression value of a music is hereinafter referred to as an impression space. The impression value is a quantity indicating the impression of listening to the music. Therefore, when the impression values of a plurality of music pieces are laid out on the impression space, the impression values are laid out according to the similarity of the impressions to the music pieces. In other words, music pieces having similar impressions are laid out at close positions in the impression space. In the following description of the embodiments, it is assumed that there are two types of impression values, an impression value X and an impression value Y.
[0034]
FIG. 3 is a diagram illustrating an example of an impression space. FIG. 3 shows a two-dimensional impression space when an active factor and an emotion factor are used as impression values. In the present embodiment, as described above, a method of performing data registration of feature amounts and impression values and music search, which is abbreviated as an impression search method, is used. The impression values calculated as described above are stored in the impression value database 12.
[0035]
The impression value database 12 stores the impression value calculated by the impression value calculation unit 11 in association with the song ID of each song in the song database 10. In the first embodiment, the music data storage unit 19 is configured by two databases, the music database 10 and the impression value database 12. Here, the music data storage unit 19 only needs to store data of a plurality of music pieces and impression values in association with each other, and may be constituted by one database.
[0036]
The music search unit 20 searches for music stored in the music database 10 using the impression value, and selects music to be reproduced. In the first embodiment, the music search unit 20 includes the impression value search unit 13 and the music selection unit 14.
[0037]
The impression center search value is input to the impression value search unit 13 from a parameter conversion unit 17 described later. The search center coordinate value is a coordinate value of the music to be reproduced in the impression space. Note that the music does not always exist at the position of the search center coordinate value. The impression value search unit 13 generates the impression space by referring to a set of the music ID and the impression value stored in the impression value database 12. Then, a music piece located close to the search center coordinate value is selected. Specifically, the Euclidean distance between the search center coordinate value and the impression value of each song is calculated, and one or several songs are preferentially selected from the one with the smallest Euclidean distance, and the song of the selected song is selected. The ID is output to the music selection unit 14. A small Euclidean distance means that a song having an impression value close to the impression value of the search center coordinate value is selected. In other words, songs with similar values of intenseness, dynamism, exhilaration, simplicity, and softness, or active factor values and emotion factor values are selected.
[0038]
When there are a plurality of music IDs input from the impression value search unit 13, the music selection unit 14 selects one of them. The selection is performed according to a predetermined standard set in advance. The predetermined criterion may be any criterion. For example, a tune that has not been reproduced before may be selected, or a user may select a favorite artist (registered in advance). Further, the music selection unit 14 acquires the music signal of the music indicated by the selected music ID from the music database 10 and provides the music signal to the reproduction unit 15. When the impression value search unit 13 outputs only one song ID, the song selection unit 14 acquires the music signal of the song indicated by the song ID from the song database 10 and provides the music signal to the playback unit 15.
[0039]
The reproduction unit 15 is realized by the above-described audio output device 4 and reproduces a music signal input from the music selection unit 14. Here, the reproducing unit 15 includes an amplifier and a speaker, but the reproducing unit 15 may be anything as long as it reproduces the music signal stored in the music database 10. For example, when the music signal is stored in the music database 10 in the linear PCM format, the reproducing unit 15 may include a DA converter. In the case where the compressed voice encoding information is stored in the music database 10, the reproduction unit 15 may include an expansion unit that decompresses the audio data.
[0040]
The position acquisition unit 16 acquires information on the current position of the vehicle from the GPS receiver 8. Then, the obtained information on the current position is output to the parameter conversion unit 17 as latitude / longitude information.
[0041]
The parameter conversion unit 17 refers to the conversion table stored in the conversion table storage unit 18 and converts the latitude / longitude information input from the position acquisition unit 16 into the search center coordinate values. The conversion table is a table that associates the latitude / longitude information with the coordinate values in the impression space.
[0042]
FIG. 4 is a diagram illustrating an example of the conversion table. As shown in FIG. 4, in the conversion table, a point (latitude / longitude information) on a map is associated with an impression value (search center coordinate value) of a music piece that matches the point (situation). In other words, the conversion table indicates, for each point on the map, the impression value of the music to be reproduced at that point. In addition, the conversion table can be combined with the map data of the car navigation device, and can be a database in which impression values are assigned to each position or major position of the latitude and longitude on the map. Further, in another embodiment, the conversion table may store the range on the map and the impression value in association with each other.
[0043]
When the latitude / longitude information is input from the position acquisition unit 16, the parameter conversion unit 17 checks whether a point close to the input latitude / longitude information exists in the conversion table. Then, when a point close to the input latitude / longitude information is present in the conversion table, the values of the impression values X and Y corresponding to the point are set as search center coordinate values. The search center coordinate values converted as described above are input to the impression value search unit 13. By inputting the search center coordinate value to the impression value search unit 13, a music piece having a value close to (or the same as) the search center coordinate value is searched, and the music piece determined by the search is reproduced.
[0044]
Hereinafter, a processing flow of the music search system according to the first embodiment will be described. FIG. 5 is a flowchart showing a flow of processing of the music search system according to the first embodiment. Here, the processing according to the first embodiment includes processing for creating an impression value database necessary for searching for music (steps S11 to S13) and automatically searching for a music suitable for the position from the position of the vehicle. And music reproduction processing (music search processing) (steps S21 to S25). These processes are executed by the CPU 2 performing a predetermined program operation.
[0045]
First, the processing of steps S11 to S13 shown in FIG. 5 will be described. This processing is preferably executed in advance before the vehicle runs. In FIG. 5, music data is stored in the music database 10 (step S11). Next, the impression value calculation unit 11 calculates an impression value for each of the stored music pieces (step S12). More specifically, a music signal of the stored music data is analyzed to calculate the feature amount of the music. Then, the calculated feature amount is weighted and added to calculate an impression value. Finally, the impression value calculation unit 11 stores the calculated impression value in the impression value database 12 in association with the song ID of each song in the song database 10 (step S13). As described above, the music database 10 and the impression value database 12 necessary for searching for a music using the impression value are generated. In another embodiment, the music database 10 and the impression value database 12 may be generated and provided in advance. That is, these databases may be generated by reading a storage medium storing the music database 10 and the impression value database 12 into the music search system.
[0046]
Next, the processing of steps S21 to S25 shown in FIG. 5 will be described. This process is executed while the vehicle is running. This process may be started by a designation from the user (for example, a search start button is pressed), or may be periodically performed at a predetermined time interval. First, the position acquisition unit 16 receives a signal from the GPS receiver 8 and acquires latitude / longitude information indicating the current position of the vehicle (step S21). The acquired latitude / longitude information is passed to the parameter conversion unit 17.
[0047]
Next, the parameter conversion unit 17 converts the latitude / longitude information input from the position acquisition unit 16 into an impression value with reference to the conversion table (step S22). Further, the converted impression value is output to the music search unit 20 as a search center coordinate value. When the search center coordinate value is input to the music search unit 20, a search for the music in the music database 10 is performed.
[0048]
The impression value searching unit 13 selects a music piece whose impression value set (active factor and emotional factor set) has a coordinate value close to the input search center coordinate value (step S23). In the process of step S23, the impression value database 12 generated in step S13 is referred to. The number of music pieces selected in step S23 may be one or more. For example, only songs having coordinate values closest to the search center coordinate value may be selected, or all songs within a predetermined distance from the search center coordinate value may be selected. The song ID of the selected song is output to the song selector 14.
[0049]
Next, the music selection unit 14 selects one of the input music IDs, and outputs data of the music indicated by the selected music ID to the reproduction unit 15 (step S24). The reproduction unit 15 reproduces the music data input from the music selection unit 14 (Step S25). Thus, the music search process is completed. By the music search process, a music having an image corresponding to the current position of the vehicle is automatically reproduced.
[0050]
As described above, according to the first embodiment, the user can enjoy the music of the image according to the situation at the place without performing complicated operations and setting processing. Specifically, when the user presses the search start button, it is possible to select and reproduce a tune close to the impression value corresponding to the current position. Further, each time the user performs a music selection operation, a music piece having an impression suitable for that point is selected.
[0051]
In addition, by setting the continuous reproduction mode (the music search process is started when the reproduction of the music is completed), the music having the optimal impression at each time is reproduced one after another in accordance with the moving position of the car. It is also possible to If the music search process takes a long time, the search center coordinates may be updated and the distance calculation may be started shortly before the end of the music playback. In this case, the position of the vehicle at the time when the reproduction of the music ends may be predicted.
[0052]
(Embodiment 2)
Hereinafter, a music search system according to Embodiment 2 will be described. The music search system according to the second embodiment does not directly convert information on the current position (latitude / longitude information) into an impression value (search center coordinate value), but converts the information on the current position into a position category and an impression word. To convert into impression values. In the second embodiment, by performing such a conversion, the setting can be changed more easily by the user. Note that, in the second embodiment, as in the first embodiment, the music search system is assumed to be incorporated in a car navigation system.
[0053]
FIG. 6 is a block diagram showing a functional configuration of the music search system according to the second embodiment. The functional configuration of the music search system according to Embodiment 2 is the same as the configuration shown in FIG. 2 except that the internal configurations of the parameter conversion unit 17 and the conversion table storage unit 18 are different. The configuration is omitted. In the second embodiment, the parameter conversion unit 17 includes a position category conversion unit 171, an impression word conversion unit 172, and an impression value conversion unit 173. The conversion table storage unit 18 includes a position table storage unit 181, an impression word table storage unit 182, and an impression value table storage unit 183.
[0054]
6, a position category conversion unit 171 inputs information on the current position output from the position acquisition unit 16 and converts the information into a position category. The position category is a classification word for distinguishing a characteristic place, for example, an expressway, a service area, an interchange, an ordinary road, a park, a seaside, an airfield, and the like. The position category is represented by a phrase indicating a feature of the position. The conversion into the position category refers to a position table stored in the position table storage unit 181. FIG. 7 is a diagram illustrating an example of the position table. As shown in FIG. 7, the position table associates the latitude / longitude information with the position category. For example, when the latitude / longitude information is “34 ° 40′15.4” north latitude, 135 ° 32′09.9 ″ east longitude (and when the latitude / longitude information is within a predetermined range from this point) , The position category is determined to be “highway”.
[0055]
The position category output by the position category conversion unit 171 is input to the impression word conversion unit 172. The impression word conversion unit 22 converts the input position category into an impression word. The impression word is a word that expresses the impression of the music, and is a word that intuitively expresses the music, such as “light song”, “relief”, and “rap style”. As the impression word, a word used as an impression value may be used as it is, or another word may be used. The conversion from the position category to the impression word refers to the impression word table stored in the impression word table storage unit 182. FIG. 8 is a diagram illustrating an example of the impression word table. As shown in FIG. 8, the impression word table associates the position category with the impression word. Since the impression word table is expressed by words that are very easy for humans to understand (images are easy to understand), it is very easy to change the contents of the table. For example, when the position category is “highway”, the impression word is determined to be “light music”.
[0056]
The impression value conversion unit 173 converts the impression word converted by the impression word conversion unit 172 into an impression value. For this conversion, an impression value table stored in the impression value table storage unit 183 is referred to. FIG. 9 is a diagram illustrating an example of the impression value table. The impression value table associates impression words with impression values. For example, when the impression word is “light song”, the impression value is determined to be (impression value X, impression value Y) = (1.35, −0.58). Note that the impression value table may associate the impression word with a range of impression values (for example, 0.3 <impression value X <0.6).
[0057]
The impression value converted by the impression value conversion unit 173 as described above is output to the music search unit 20 as search center coordinates. The subsequent operation processing for the search center coordinate value is the same as in the first embodiment, and a description thereof will not be repeated.
[0058]
FIG. 10 is a flowchart showing details of the process of converting position information to an impression value in the second embodiment. The processing illustrated in FIG. 10 corresponds to the processing in step S22 in FIG. That is, the entire process in the second embodiment is the same as the process shown in FIG. 5, and the process shown in FIG. 10 is performed instead of the process in step S22.
[0059]
In the second embodiment, after step S21, the position category conversion unit 171 converts the information on the current position input from the position acquisition unit 16 into a position category (step S221). Next, impression word conversion section 172 converts the position category converted in step S221 into an impression word. Further, impression value conversion section 173 converts the impression word converted in step S222 into an impression value (step S223). After the end of step S223, the processing of step S23 and thereafter shown in FIG. 5 is performed.
[0060]
Each table of the conversion table storage unit 18 used in the second embodiment is created as follows. First, a position category and an impression word are prepared in advance. Next, position information (latitude / longitude information) corresponding to the prepared position category is set, and an impression value corresponding to the prepared impression word is set. For example, for the position category "highway", a point whose (latitude, longitude) is from (X1, Y1) to (X3, Y3) via (X2, Y2) is set. Further, the impression word “song to be danced” is set as coordinates of the impression space (ZX1, ZY1), and the impression word “song to sleep” is set as (ZX2, ZY2). Finally, the position category is associated with the impression word. This association may be performed by the user or may be appropriately changed by the user. The combination of the position category and the impression word is, for example, a combination of “expressway” and “song to be danced”, and is an expression that is easy for the user to understand, so that the change is easy. In addition, the association between the position category and the impression word varies depending on the user, and even a single user varies depending on the mood at that time, the purpose of driving, and the like. Therefore, it is very effective that the user can easily change this association.
[0061]
As described above, according to Embodiment 2, the user can easily change the search setting using the position category and the impression word. Furthermore, a personalized impression word conversion table can be created as a preset.
[0062]
In the second embodiment, the position information is converted into the impression value using three tables: the position table, the impression word table, and the impression value table. Here, in another embodiment, the conversion may be performed by the following method. That is, a method of converting the position category into the impression value after converting the position information into the position category may be employed. That is, the position category and the impression value may be associated with each other in the impression value table. At this time, an impression word table for associating the position category with the impression word is unnecessary. Further, after converting the position information into the impression word, the impression word may be converted into the impression value. That is, in the impression word table, the position information and the impression word may be associated with each other. At this time, a position table for associating the position information with the position category is unnecessary.
[0063]
(Embodiment 3)
Hereinafter, a music search system according to Embodiment 3 will be described. The music search system according to the third embodiment allows a user to add a music that the user likes to the music database 10 and perform a search by an impression value when the music that the user likes is reproduced, and to newly add the music to the position / impression value conversion table. This makes it possible to add an appropriate response. Note that, in the third embodiment, as in the first embodiment, it is assumed that the music search system is incorporated in a car navigation system. Although not shown in FIG. 1, in the third embodiment, it is assumed that a plurality of music sources such as a CD player and a radio are incorporated in the system as music sources for playing music.
[0064]
FIG. 11 is a block diagram showing a functional configuration of a music search system according to Embodiment 3. FIG. 11 differs from the system shown in FIG. 1 in further including a recording receiving unit 31, a correspondence recording unit 32, and a music signal input unit 33. The following description focuses on the differences from FIG.
[0065]
The recording receiving unit 31 is realized by the input unit 5 and receives a recording start instruction from a user. If the user feels that the music being played at that time matches the situation at that moment, the user shall instruct recording start. Here, it is assumed that the input unit 5 includes a “favorite button”, and the user can instruct recording start by pressing the favorite button. The recording start instruction is output to the correspondence recording unit 32 and the audio signal input unit 33. When the recording start instruction is input from the recording accepting unit 31, the correspondence recording unit 32 acquires the current position from the position acquisition unit 16 and acquires an impression value from the impression value database 12. Further, the correspondence between the acquired current position and the impression value is added to the conversion table in the conversion table storage unit 18.
[0066]
The audio signal input unit 33 receives an audio signal output from a music source such as a CD player or FM radio at any time. When receiving an instruction to start recording from the recording accepting unit 31, the acoustic signal input unit 33 converts the input acoustic signal into a music signal that can be analyzed by the impression value calculation unit 11, and outputs the music signal to the impression value calculation unit 11. Impression value calculation section 11 calculates an impression value for the input music signal in the same manner as in the first embodiment, and stores it in impression value database 12.
[0067]
Hereinafter, processing during music reproduction will be described. FIG. 12 is a flowchart showing a flow of a process during music reproduction according to the third embodiment. Here, there are two processes shown in FIG. 12: a process of storing the data of the music being reproduced and calculating an impression value (steps S31 to S35) and a process of updating the conversion table (steps S36 to S39). Divided into These processes are executed by the CPU 2 performing a predetermined program operation.
[0068]
When the reproduction of music is started, the audio signal input unit 33 starts inputting an audio signal output from the music source (step S31). Next, the recording accepting unit 31 determines whether or not there has been a recording start instruction (step S32). The recording accepting unit 31 waits until there is a recording start instruction. When there is a recording start instruction, the audio signal input unit 33 stores the data of the input music in the music database 10 (step S33). Next, the impression value calculation unit 11 calculates an impression value of the music signal input from the audio signal input unit 33 (Step S34), and stores the calculated impression value in the impression value database 12 (Step S35). By the above processing, when the user presses the favorite button during the reproduction of the music, the music can be recorded and the impression value can be calculated.
[0069]
Next, a process of updating the conversion table will be described. When the reproduction of the music is started, the position acquisition unit 16 acquires information on the current position from the GPS receiver 8 (Step S36). Next, the recording accepting unit 31 determines whether or not there has been a recording start instruction (step S37). If there is no recording start instruction, the process returns to step S36, and repeats the processing of steps S36 and S37 until there is a recording start instruction. On the other hand, when there is a recording start instruction, the recording receiving unit 31 instructs the correspondence recording unit 32 to update the table. In response to this, the correspondence recording unit 32 acquires the current position information from the position acquisition unit 16 and acquires the impression value of the music being reproduced from the impression value database 12 (step S38). Lastly, the correspondence recording unit 32 updates the correspondence between the acquired information on the current position and the impression value so as to add it to the conversion table (step S39).
[0070]
As described above, according to the third embodiment, when a song corresponding to the situation at the current position is being played, a new content is added to the conversion table by pressing the “favorite button” by the user. . Therefore, the next time the user comes to the place, the user can listen to the same tune or a tune having a similar impression without any special effort. In the third embodiment as well, similar to the first embodiment, a process of searching for and reproducing a music piece based on an impression value derived based on the current position is performed.
[0071]
In the third embodiment, the user may press the favorite button near the end of the music being reproduced. Therefore, the music being reproduced may be temporarily stored in the music database 10 before the favorite button is pressed, and the calculation of the impression value may be started temporarily. Then, when the favorite button is pressed, the current position at that time may be temporarily stored, and the conversion table may be updated after the calculation of the impression value is completed. In this case, if the favorite button is not pressed, the temporarily stored and temporarily calculated data may be deleted.
[0072]
Further, the method according to the third embodiment is also applicable to a case where a position category and an impression word are used as in the second embodiment. In this case, for example, the position category and the impression word are derived from the position where the "favorite button" is pressed, and the impression value table is added so as to add the correspondence between the derived impression word and the impression value of the music being reproduced. Update it. In addition to updating the impression value table, the impression word table may be updated.
[0073]
(Embodiment 4)
Hereinafter, a music search system according to Embodiment 4 will be described. The music search system according to the fourth embodiment searches for music in consideration of other conditions in addition to the current position. In the fourth embodiment, as in the first embodiment, the music search system is assumed to be incorporated in a car navigation system. Although not shown in FIG. 1, in the fourth embodiment, a sensor (for example, a temperature sensor or an optical sensor) for detecting an environmental parameter described later is connected to the signal processing unit 6 shown in FIG. It is assumed that
[0074]
FIG. 13 is a block diagram showing a functional configuration of the music search system according to Embodiment 4. FIG. 13 differs from the system shown in FIG. 1 in further including an environment information acquisition unit 41 and an impression value correction unit 42. The following description focuses on the differences from FIG.
[0075]
The environment information acquisition unit 41 acquires environment parameters from various sensors incorporated in the car navigation system. The environmental parameters are, for example, parameters indicating noise, temperature, user's pulse, ambient brightness, altitude of the current position, and the like. Noise is related to whether it is in town or suburbs, outdoors or indoors. Temperature is related to season and weather. The user's pulse is related to their mental state. The brightness is related to day or night, indoor conditions, and the like. The altitude is related to the level or the mountain. Therefore, it can be said that such environmental parameters affect situations around the user. In the fourth embodiment, an impression value (search center coordinate value) used for a search is calculated in consideration of factors that affect the user's psychology, in addition to the position information. The environment parameters acquired by the environment information acquisition unit 41 are output to the impression value correction unit 42. Here, a temperature sensor is incorporated in the car navigation system, and the environment information acquisition unit 41 acquires temperature as an environment parameter.
[0076]
The impression value correction unit 42 corrects the coordinate value of the search center coordinate value input from the parameter conversion unit 17. This correction is performed based on the environment parameters input from the environment information acquisition unit 41. Specifically, the correction is performed by the following method. That is, the correction formula for correcting the search center coordinate value is expressed by a function of the value of the environment parameter and the search center coordinate value. A simple example is to shift the search center coordinate value in a predetermined direction according to the value of the environment parameter. Specifically, the value of the impression value X included in the search center coordinate value is x1, the value of the environment parameter is x2, and the value of the corrected impression value X is x '.
x '= x1 + a * (x2-b) (a and b are constants)
A correction formula such as the following may be used. Also,
x '= x1 * [1 + a * (x2-b)]
A modified expression such as
[0077]
Next, the flow of processing of the music search system according to Embodiment 4 will be described. FIG. 14 is a flowchart showing a flow of processing of the music search system according to Embodiment 4. Here, also in the fourth embodiment, as in the first embodiment, two processes of a process of creating an impression value database (steps S11 to S13 shown in FIG. 1) and a music search process are performed. Since the process of creating a database is the same as that of the first embodiment, it is omitted in FIG. That is, FIG. 14 shows a flow of a music search process which is a process different from the first embodiment. This process is executed by the CPU 2 performing a predetermined program operation. Also, the same processes as those in FIG. 5 are denoted by the same step numbers.
[0078]
The processing in step S21 is the same as in FIG. Subsequent to step S21, the environment information acquisition unit 41 acquires environment parameters (step S41). Next, step S22, which is the same processing as in FIG. 1, is performed. Subsequent to step S22, the impression value correction unit 42 corrects the impression value converted in step S22 based on the environment parameters acquired in step S41 (step S42). This correction is performed using the function as described above. The processing after step S23 is the same as in FIG.
[0079]
As described above, according to the fourth embodiment, music search is performed using not only the position information but also the environment parameters indicating the environment around the user. For example, when the volume of the surrounding noise is detected by the sensor, a search can be performed such that the search result changes according to the surrounding noise. Specifically, when the surroundings are noisy, the music search system can be set so that a more intense song is selected, or conversely, a more gentle song is selected. As described above, by searching for music using the environment parameters, situations around the user can be more finely detected, and variations in search results can be made more diverse.
[0080]
In the fourth embodiment, a case where one type of environmental parameter is used has been described, but a plurality of environmental parameters may be used. When a plurality of environment parameters are used, a correction formula may be prepared for each type of environment parameter, or one correction formula including variables of a plurality of types of environment parameters may be prepared.
[0081]
(Embodiment 5)
Hereinafter, a music search system according to Embodiment 5 will be described. The music search system according to the fifth embodiment creates a list (playlist) of music to be reproduced based on path information. In the fifth embodiment, as in the first embodiment, the music search system is assumed to be incorporated in a car navigation system.
[0082]
FIG. 15 is a block diagram showing a functional configuration of a music search system according to Embodiment 5. FIG. 15 differs from the system shown in FIG. 2 in further including a route generation unit 51, a point determination unit 52, and a list creation unit 53. Hereinafter, the description will focus on the differences from FIG.
[0083]
The route generation unit 51 searches for an optimum route (hereinafter, simply referred to as “route”) from a map database or a route database stored in a car navigation system, and calculates a travel time and the like. It is well known. The route generated by the route generation unit 51 is output to the point determination unit 52.
[0084]
The point determination unit 52 determines a point (tune start point) at which the music to be played is switched based on the average music time length and the average speed of the vehicle. This determination method is performed, for example, as follows. Specifically, first, the starting point of the route is determined as the first music start point. When the vehicle reaches the first song start point, the first song is played. Next, the average music time length is multiplied by the average speed of the vehicle to calculate the distance from the first music start point to the next music start point. The second music start point is determined based on the calculated distance and the first music start point. Thereafter, the music start point on the route can be determined by sequentially determining the next music start point based on the calculated distance and the determined music start point. The latitude / longitude information of the determined music start point is output to the position acquisition unit 16.
[0085]
The latitude / longitude information acquired by the position acquisition unit 16 is converted into an impression value by the parameter conversion unit 17, and a music search is performed using the converted impression value. The music selected as a result of the search is the music to be reproduced at the music start point. The music search unit 20 selects a music for each music start point acquired by the position acquisition unit 16.
[0086]
The list creation unit 53 creates a list of the music pieces selected by the music search unit 20. The list may include music data input from the music search unit 20, or may include only music IDs. In the list, information of a music start point at which music is to be reproduced is associated with each music. The reproduction unit 15 reproduces music according to the list. Specifically, when the current position reaches the music start point, the music corresponding to the music start point is reproduced.
[0087]
Next, a flow of processing of the music search system according to the fifth embodiment will be described. FIG. 16 is a flowchart showing the flow of the process of the music search system according to Embodiment 5. The processing shown in FIG. 16 is performed before the vehicle runs. First, the route generation unit 51 generates a route (Step S51). The starting point and the destination of the route are set, for example, by being input by the user. Next, the point determination unit 52 determines a music start point on the route generated in step S51 (step S52). Further, for each music start point determined in step S52, a music piece that matches the situation of the music start point is selected (step S53). This processing is the same as the processing in steps S21 to S24 in the first embodiment. Finally, the list creation unit 53 creates a list of the music pieces selected in step S53 (step S54). In the fifth embodiment, the above processing is performed before the vehicle travels, and the music is played according to the list while the vehicle travels.
[0088]
As described above, according to the fifth embodiment, before actually arriving at the place, it is possible to select a music piece suitable for the situation of the place in advance. As described above, the music search system according to the present invention is not limited to the search for music that matches the current situation, but may be expected situations (in the case of the fifth embodiment, points expected to pass later) The search may be made for a song that fits. According to the fifth embodiment, since it is not necessary to perform the search processing during traveling, the processing load during traveling in the car navigation system can be reduced.
[0089]
In addition, by transferring the data of the created list to another music playback device, it is possible to perform music playback according to the list in the other music playback device. As a result, even in a music playback device that does not have an impression search / song selection playback unit, it is possible to search for and play back songs that match the situation.
[0090]
Furthermore, if the departure time at the departure point is known, the arrival time at which the music start point is reached can be predicted. If this arrival time is described in the list in association with the music, there is no need to detect the current position during traveling. Therefore, such a list can also be used in a music reproducing device without a GPS receiver.
[0091]
(Embodiment 6)
Hereinafter, a music search system according to Embodiment 6 will be described. The music search system according to Embodiment 6 has a configuration including a mobile terminal and a server. FIG. 17 is a block diagram showing a configuration of a music search system according to Embodiment 6. As shown in FIG. 17, the music search system includes a mobile terminal 61 and a server 62. The mobile terminal 61 and the server 62 can communicate via the Internet 63.
[0092]
FIG. 18 is a block diagram showing a detailed configuration of the mobile terminal 61 and the server 62. Note that, in FIG. 18, components having the same functions as those in FIG. 1 are given the same numbers. The mobile terminal 61 includes a position acquisition unit 16, a reproduction unit 15, and a terminal-side communication unit 64. The server 62 includes a music data storage unit 19, a parameter conversion unit 17, a conversion table storage unit 18, a music search unit 20, an impression value calculation unit 11, and a server-side communication unit 65. The terminal-side communication unit 64 transmits and receives data to and from the server 62 via the Internet 63. The server communication section 65 transmits and receives data to and from the mobile terminal 61 via the Internet 63. Note that the Internet network 63 is not shown in FIG.
[0093]
In the sixth embodiment, when the position acquisition unit 16 of the mobile terminal 61 acquires information on the current position of the mobile terminal 61, the acquired information on the current position is transmitted to the server 62 by the terminal-side communication unit 64. The server 62, which has received the information on the current position, selects a song that matches the situation of the position of the mobile terminal 61 by the parameter conversion unit 17 and the song search unit 20. The data of the selected music and the music ID are transmitted to the mobile terminal 61 by the server-side communication section 65. The mobile terminal 61 that has received the music data reproduces the music by the reproduction unit 15.
[0094]
As described above, according to the sixth embodiment, the mobile terminal 61 does not need to perform a music search process, so that the processing load on the mobile terminal 61 can be reduced. Further, the mobile terminal 61 does not need to store the music data, and the server 62 only needs to store the music data. Therefore, a large number of music data can be searched. Therefore, a large number of music pieces can be provided to the user, and music pieces more suited to the situation can be provided to the user.
[0095]
In the sixth embodiment, the music data is transmitted from the server 62 to the mobile terminal 61. However, in another embodiment, only the music ID may be transmitted. In this case, the mobile terminal 61 needs to have a music database. Further, the server 62 needs to know the contents of the music database of the mobile terminal 61. That is, the server 62 needs to store at least information of the same content as the content stored in the music database of the mobile terminal 61. For example, the mobile terminal 61 may transmit the contents of the music database to the server 62 in advance.
[0096]
In the sixth embodiment, one music piece determined by the server 62 is transmitted to the mobile terminal 61. In another embodiment, a plurality of music pieces are transmitted to the mobile terminal 61 as candidates. You may. FIG. 19 is a diagram showing a configuration according to another embodiment. In FIG. 19, a plurality of songs are selected by the impression value search unit 13 of the server 62, and data and song IDs of those songs are transmitted. In the mobile terminal 61, one music piece is selected from the plurality of received music pieces by the music selection unit 14, and the selected music piece is reproduced.
[0097]
Further, in the sixth embodiment, the mobile terminal 61 is configured not to have the function of searching for music, but in another embodiment, the mobile terminal 61 may be configured to have the function. Specifically, the mobile terminal 61 may be the car navigation system according to the first to fifth embodiments. In this case, music search may be performed on both the mobile terminal 61 and the server 62, and one of the search results may be selected and played. Further, when an appropriate music is not found in the mobile terminal 61, the server 62 may search for a music.
[0098]
In the above description, the number of conversion tables is not limited to one, and a plurality of tables may be selectively used according to predetermined conditions. For example, three types of conversion tables are prepared for morning use, day use, and night use, and in the morning use a table in which more refreshing songs are selected, and in the night use, gentler songs are selected. The table may be used according to time so as to make a table as shown in FIG. As for the tables (position table, impression word table, and impression value table) used in the second embodiment, a plurality of tables may be selectively used according to predetermined conditions, similarly to the conversion table.
[0099]
Further, these tables (the conversion table, the position table, the impression word table, and the impression value table) may be acquired by separately distributing them from outside the music search system. For distribution, the Internet and removable media can be used. Similarly, the music data stored in the music database 10 may be obtained by separately distributing the data from outside the music search system. For example, distribution of a new song is one of the most effective methods.
[0100]
Further, in the first to fifth embodiments, the form in which the music search system is incorporated in the car navigation system has been described, but the form of the music search system is not limited to this. The music search system can be realized by combining a portable music server or a portable audio device storing a large number of music in a semiconductor player, a personal GPS device, and a function of searching for music using an impression value. . If the music search system is realized by a portable mobile terminal, the present system can be used even when traveling by train.
[0101]
In the first to sixth embodiments, the position information is used as the situation parameter, but the situation parameter is not limited to this. For example, the speed of the vehicle may be used. FIG. 20 is a diagram illustrating a modification of the conversion table. In FIG. 20, the impression value X does not correspond to the speed. In this case, the speed information is converted into only the impression value Y, and a music search is performed using only the impression value Y. As described above, it is also possible to search for music using only one type of impression value. The position information and the speed information may be used as the situation parameters, and the position information may be converted into the impression value X and the speed information may be converted into the impression value Y.
[0102]
Further, as the situation parameters, parameters such as ambient noise, temperature, user's pulse, ambient brightness, and altitude of the current position can be considered. In addition, a VICS system that provides traffic information such as traffic information to vehicles on a road is known, but it may be a traffic information situation parameter obtained by this VICS system. Specifically, when the music search system receives the traffic congestion information, it is preferable to create a conversion table that allows the user to select a softer music. In the fourth embodiment, when the music search system receives the traffic congestion information, the impression value may be corrected so that a softer music is selected.
[0103]
When music is continuously played, the same value is obtained as a situation parameter, so that a previously heard music may be played again. For example, when position information is used as a situation parameter, the vehicle may not move much due to signal waiting, traffic congestion, or the like, and position information at almost the same position as the previous time may be obtained. In order to avoid such a case, the history information of the reproduced music may be recorded in the memory, and the music reproduced within a predetermined time in the past may not be selected. Specifically, the music included in the history information is not searched. At this time, the music played before the predetermined time or more may be deleted from the history information. Conversely, music that is frequently listened to may be recorded in the history information memory, and the priority of selection of the music recorded in the history information may be increased.
[0104]
In the first to sixth embodiments, music search is performed using only impression values. However, bibliographic information such as music titles, artist names, and music genre names may be used together with impression values. Good. For example, when the user has input an artist name or a genre name in advance, music search may be performed from the input. Also, for example, it is possible to search for a song whose title includes the phrase “beach”. Further, when the user inputs a specific artist name, a search is performed from songs owned by the artist, and it is possible to enjoy a one-man concert style performance.
[0105]
In the first to sixth embodiments, the music piece selected as the music piece to be reproduced by the music search is the music piece having the impression value closest to the search center coordinate value. As a method of selecting a song, a random number may be selected from among songs having an impression value included within a predetermined distance from the search center coordinate value using a random number.
[0106]
In the fifth embodiment, an example in which a list is created from a route has been described. Conversely, a user may first create a music list and derive a route from the list. If the driving plan is created along the route derived in this way, the user can enjoy the play of determining the driving route by music progression. Such a play can also be called a music rally.
[0107]
Further, the music search systems according to Embodiments 1 to 6 can be used for a schedule management function. For example, the time is set as a situation parameter, and if the time is about to be delayed, the music that seems to be in a hurry is reproduced. Also, for example, a table for storing the scheduled time of the progress of the schedule is prepared as a data table for schedule management. Then, the scheduled time of the progress of the schedule is compared with the current time, and if the margin falls below a certain range, a song having an impression value with a fast tempo is reproduced.
[0108]
Alternatively, vehicle information, for example, information on a boarding railway company may be detected as the situation parameter. The vehicle information may be converted into a position category, and an impression of each railway company or an impression word associated with a railway line may be selected, converted into an impression value, and a tune may be searched. For example, if it is a Kosai Line around Lake Biwa, it will be converted into impression words that remind you of lakes, beaches, boats, yachts, etc.
[0109]
When the music search system can communicate with another device, position information of a predetermined device may be used as a situation parameter. That is, when the position information and the device ID are received from a predetermined device, and the received position information and the current position of the device are within a certain distance, a music piece having a predetermined impression value is reproduced. Thus, when a predetermined device approaches, an event can be generated. For example, when an acquaintance of the user approaches, music that images the acquaintance is reproduced. Personal terminal devices and mobile phones having the function of detecting the position of a wandering elderly or lost child have been developed, but the functions described above can be realized by combining such a device with a music search / playback function. .
[0110]
In Embodiments 1 to 6, the conversion table may be dynamically distributed. For example, in the vicinity of a fast food restaurant, a conversion table is selected so that a song having an impression similar to the theme song of the restaurant is selected. Thereby, the impression of the store can be given to the user, and return to the store can be expected. Furthermore, when the conversion table is distributed, points of the point service may be given to the user.
[0111]
In addition, when a function of adding contents such as a conversion table is added (see Embodiment 3), the contents of the added table can be fed back. Feedback means transmitting the contents of the added tables (conversion table, position table, impression word table, and impression value table) to the collection center. Thereby, the association in each table performed by the user can be collected at the collection center. Then, by distributing the association collected by the collection center to other users, the other users can add the association to a table of their own system. Therefore, it is possible to easily obtain an appropriate impression value or an impression word in a place where the user does not go. This allows the user to share the feeling and emotion when visiting a certain place with other users.
[0112]
In addition, the collection center allows the user's impression of a certain place to be easily counted. For example, if the certain place is a store, it is possible to monitor what impression of the song the user feels matches the store. If you think that the impression of the song is the impression of the store, you can monitor how you feel the atmosphere of the store.
[0113]
Further, when the collection center provides each table or music, the collection center determines the user's preference based on information obtained from the user, and provides a table or music that matches the user's preference. can do.
[0114]
In order to perform the above-described feedback, a configuration similar to that in FIG. 17 may be employed. That is, a communication line between the collection center and the music search system may be established.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a music search system according to a first embodiment.
FIG. 2 is a block diagram showing a functional configuration of the music search system according to the first embodiment.
FIG. 3 is a diagram illustrating an example of an impression space.
FIG. 4 is a diagram showing an example of a conversion table.
FIG. 5 is a flowchart showing a processing flow of the music search system according to the first embodiment.
FIG. 6 is a block diagram showing a functional configuration of a music search system according to Embodiment 2.
FIG. 7 is a diagram illustrating an example of a position table.
FIG. 8 is a diagram illustrating an example of an impression word table.
FIG. 9 is a diagram illustrating an example of an impression value table.
FIG. 10 is a flowchart showing details of a process of converting position information into an impression value in the second embodiment.
FIG. 11 is a block diagram showing a functional configuration of a music search system according to Embodiment 3.
FIG. 12 is a flowchart showing a flow of a process during music reproduction according to the third embodiment.
FIG. 13 is a block diagram showing a functional configuration of a music search system according to Embodiment 4.
FIG. 14 is a flowchart showing a processing flow of the music search system according to the fourth embodiment.
FIG. 15 is a block diagram showing a functional configuration of a music search system according to Embodiment 5.
FIG. 16 is a flowchart showing a processing flow of the music search system according to the fifth embodiment.
FIG. 17 is a block diagram showing a configuration of a music search system according to Embodiment 6.
FIG. 18 is a block diagram showing a detailed configuration of a mobile terminal 61 and a server 62.
FIG. 19 is a diagram showing a configuration according to another embodiment.
FIG. 20 is a diagram showing a modification of the conversion table.
FIG. 21 is a diagram showing a configuration of a conventional music playback device.
[Explanation of symbols]
15 Reproduction unit
16 Position acquisition unit
17 Parameter converter
19 Music data storage
20 Music search section

Claims (14)

A music search system for searching for music,
A music data storage unit for storing data of a plurality of music pieces and music parameters indicating characteristics of the music pieces in association with each other;
A situation acquisition unit that acquires a situation parameter indicating a situation around the user;
A parameter conversion unit that converts the situation parameters acquired by the situation acquisition unit into music parameters,
A music search unit that searches for music stored in the music data storage unit using the music parameters converted by the parameter conversion unit, and selects a music to be played,
A music search system, comprising: a playback unit that plays the music selected by the music search unit. The music search system according to claim 1, wherein the music parameter is an impression value obtained by quantifying an impression received by a listener for the music. Further comprising a conversion table storage unit for storing a conversion table in which the situation parameters and the music parameters are associated with each other;
The music search system according to claim 1, wherein the parameter conversion unit converts the situation parameters into music parameters using a conversion table. A recording receiving unit for receiving a recording instruction from a user,
When the recording receiving unit receives a recording instruction while the music is being reproduced by the reproducing unit, a corresponding recording unit that adds a set of a music parameter of the music being reproduced and a current situation parameter to the conversion table. The music search system according to claim 3, further comprising: The situation parameter is a movement parameter indicating a movement state of a moving body that moves with the user,
The music search system according to claim 1, wherein the music search system is mounted on the moving body. The movement parameter is position coordinates indicating a position of the moving body,
A position table storage unit that stores a position table that associates the position coordinates with a position category that represents a feature of the position indicated by the position coordinates;
A position category, and an impression value table storage unit that stores an impression value table in which an impression value of a song to be reproduced in the position category is associated with the position category,
The parameter conversion unit,
Using the position table, a position category conversion unit that converts the position coordinates obtained by the situation obtaining unit into a corresponding position category,
The music search system according to claim 5, further comprising: an impression value conversion unit that converts the position category converted by the position category conversion unit into a corresponding impression value using the impression value table. The movement parameter is position coordinates indicating a position of the moving body,
An impression word table storage unit that stores an impression word table in which the position coordinates are associated with an impression word expressing an impression of a song to be reproduced at a position indicated by the position coordinates;
An impression value table storage unit that stores an impression value table in which impression words and impression values are associated with each other;
The parameter conversion unit,
Using the impression word table, an impression word conversion unit that converts the position coordinates acquired by the situation acquisition unit into a corresponding impression word,
The music search system according to claim 5, further comprising: an impression value conversion unit configured to convert the impression word converted by the impression word conversion unit into a corresponding impression value using the impression value table. The movement parameter is position coordinates indicating a position of the moving body,
A position table storage unit that stores a position table that associates the position coordinates with a position category that represents a feature of the position indicated by the position coordinates;
An impression word table storage unit that stores an impression word table that associates a position category with an impression word that expresses an impression of a song to be reproduced at a position represented by the position category;
An impression value table storage unit that associates impression words with impression values;
The parameter conversion unit,
Using the position table, a position category conversion unit that converts the position coordinates obtained by the situation obtaining unit into a corresponding position category,
An impression word conversion unit that converts the position category converted by the position category conversion unit into a corresponding impression word using the impression word table;
The music search system according to claim 5, further comprising: an impression value conversion unit that converts the position category converted by the position category conversion unit into a corresponding impression value using the impression value table. A route generation unit that generates a route between two predetermined points;
A point determination unit that determines a predetermined point on the route,
A list creation unit that creates a list of songs selected by the song search unit,
The situation obtaining unit obtains position coordinates of the predetermined point as the situation parameters,
The music search system according to claim 1, wherein the reproduction unit reproduces music according to the list. A mobile terminal, a server capable of communicating with the mobile terminal,
The mobile terminal,
The status acquisition unit;
Including the playback unit,
The server comprises:
The music data storage unit;
The parameter conversion unit;
Including the music search unit,
The situation obtaining unit transmits the obtained situation parameter to the server,
The parameter conversion unit converts the situation parameters transmitted from the situation acquisition unit to music parameters,
The music search unit transmits data of the selected music to the mobile terminal,
The music search system according to claim 1, wherein the playback unit receives music data transmitted from the music search unit and plays the music. The song data storage unit stores a song ID for identifying a song in association with song data,
A mobile terminal, a server capable of communicating with the mobile terminal,
The mobile terminal,
The music data storage unit;
The status acquisition unit;
Including the playback unit,
The server comprises:
The parameter conversion unit;
The music search unit;
A server-side music data storage unit that stores at least information of the same contents as the contents stored in the music data storage unit,
The situation obtaining unit transmits the obtained situation parameter to the server,
The parameter conversion unit converts the situation parameters transmitted from the situation acquisition unit to music parameters,
The music search unit transmits a music ID for identifying the selected music to the mobile terminal,
The music search system according to claim 1, wherein the reproduction unit reproduces a music indicated by a music ID transmitted from the music search unit. A music search method for searching for music,
A plurality of music data and music parameters indicating characteristics of the music are stored in association with each other,
A situation acquisition step of acquiring a situation parameter indicating a situation around the user;
A parameter conversion step of converting the situation parameters acquired in the situation acquisition step to music parameters,
Performing a search for the stored music using the music parameters converted in the parameter conversion step, a music search step of selecting a music to be reproduced,
A reproducing step of reproducing the music selected in the music searching step. A program for causing a computer to execute a music search method for performing music search,
The computer stores a plurality of music data and music parameters indicating characteristics of the music in association with each other.
A situation acquisition step of acquiring a situation parameter indicating a situation around the user;
A parameter conversion step of converting the situation parameters acquired in the situation acquisition step to music parameters,
Performing a search for the stored music using the music parameters converted in the parameter conversion step, a music search step of selecting a music to be reproduced,
And a reproducing step of reproducing the music selected in the music searching step. A computer-readable recording medium storing a program for causing a computer to execute a music search method for performing music search, wherein the computer has data of a plurality of music and music parameters indicating characteristics of the music. Is stored in association with
A situation acquisition step of acquiring a situation parameter indicating a situation around the user;
A parameter conversion step of converting the situation parameters acquired in the situation acquisition step to music parameters,
Performing a search for the stored music using the music parameters converted in the parameter conversion step, a music search step of selecting a music to be reproduced,
A recording medium storing a program for causing the computer to execute a reproduction step of reproducing the music selected in the music search step.

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