JP4846334B2 - Music player - Google Patents

Description

  The present invention relates to a music playback device that searches for favorite music and plays back the music.

In order to be able to search a favorite music from a large amount of music stored in the database and to play the music, the conventional music playback device categorizes the music in the database as “new”, “new”, “ They are categorized into “normal” and “old” categories.
Alternatively, the music in the database is classified into categories “classic”, “pops”, and “others”.
As a result, the music in the database is presented on the display of the music playback device by old and new or by genre (see, for example, Patent Document 1).

JP 2003-256867 A (paragraph numbers [0040] to [0060], FIG. 2)

  Since the conventional music reproducing apparatus is configured as described above, it is possible to search for music of a desired age or music of a desired genre. However, there is a problem that it is not possible to easily search for favorite music because only one-dimensional search that presents music classified by old and new or genre is not enough to narrow down the music.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a music playback device that can easily search for favorite music.

The music reproducing apparatus according to the present invention comprises mapping means for mapping a mark corresponding to music on a two-dimensional music map according to the feature quantity extracted by the feature quantity extraction means, and the center of the displayed music map . A rotation operation receiving means for receiving a rotation operation of the search needle rotating as a fulcrum and performing a rotation process of the search needle, and the search needle is mapped on the music map along with the rotation process of the rotation operation reception means. When it overlaps with a mark corresponding to any of the music, only a part of the music is played, and when the music playback command is received, the whole playback starts from the beginning of the music. .

According to the present invention, there is an effect that can simply search for favorite music easy.

Embodiment 1 FIG.
FIG. 1 is a block diagram showing a music reproducing apparatus according to Embodiment 1 of the present invention. In the figure, a database 1 is a memory device such as a hard disk capable of storing a large amount of music data.
The feature amount extraction unit 2 analyzes the music data stored in the database 1 and determines the feature amount of the music (eg, “tempo”, “beat whiteness (rhythm fluctuation)”, “beat strength”, “beat”). Intensity ratio ”,“ average number of sounds ”,“ spectrum change degree ”) are extracted. Note that the feature quantity extraction unit 2 constitutes a feature quantity extraction unit.

The mapping processing unit 3 generates a two-dimensional music map 4 for mapping music according to, for example, the “brightness” and “tempo” of the music, and uses the music feature amount extracted by the feature amount extraction unit 2. Accordingly, a process of mapping a mark corresponding to the music (hereinafter referred to as “music mark”) on the music map 4 is performed. The mapping processing unit 3 constitutes mapping means.
The music map 4 is a two-dimensional map in which the horizontal axis represents the brightness of the music (brighter toward the right side and darker toward the left side), and the vertical axis represents the tempo of the music (the upper part is faster and the lower part is slower). It is.
Note that the center of the music map 4 is an intermediate position in both the brightness and tempo of the music, and a fulcrum of the search needle P is provided at the center of the music map 4.
The display processing unit 5 is composed of, for example, a touch panel equipped with a graphic engine, and performs processing for displaying the music map 4 to which the music mark is mapped by the mapping processing unit 3.

The dial key 6 is a hard switch that is provided, for example, on the instrument panel of the vehicle and is operated when the user searches for desired music.
The operation processing unit 7 measures the rotation direction and the rotation amount of the dial key 6 and performs a process of rotating the search needle P having a fulcrum at the center of the music map 4 in the clockwise direction or the counterclockwise direction according to the measurement result. .
The dial key 6 and the operation processing unit 7 constitute a rotation operation accepting unit.

The music playback unit 8 monitors the positional relationship between the music mark mapped on the music map 4 and the search needle P, and the search needle P is mapped on the music map 4 as the operation processing unit 7 rotates. When it overlaps with any music mark, the music data of the chorus section of the music corresponding to the music mark is acquired from the database 1, and the process of reproducing the chorus section of the music is performed.
The speaker 9 outputs the music reproduced by the music reproducing unit 8 as sound. The music playback unit 8 and the speaker 9 constitute music playback means.

In the example of FIG. 1, the feature extraction unit 2, the mapping processing unit 3, the display processing unit 5, the operation processing unit 7, and the music playback unit 8, which are components of the music playback device, are installed on dedicated hardware (for example, an MPU is installed). However, if the music playback device is configured by a computer, the feature quantity extraction unit 2, the mapping processing unit 3, the display processing unit 5, and the operation A program in which processing contents of the processing unit 7 and the music playback unit 8 are described may be stored in a memory of a computer, and a CPU of the computer may execute the program stored in the memory.
FIG. 2 is a flowchart showing the processing contents of the music reproducing apparatus according to Embodiment 1 of the present invention.

Next, the operation will be described.
The feature quantity extraction unit 2 analyzes the music data stored in the database 1 and extracts the feature quantity of the music (step ST1).
That is, the feature quantity extraction unit 2 performs, for example, a publicly-known SD (Semantic Differential) method so that music parameters (eg, “tempo”, “beat whiteness (rhythm fluctuation)”), “beat intensity” , “Beat intensity ratio”, “average number of sounds”, “spectrum change degree”) are absolutely evaluated in seven stages.

For example, when the mapping processing unit 3 enables music selection based on “brightness” or “tempo”, as shown in FIG. 3, the horizontal axis indicates the brightness of the music (brighter on the right side and darker on the left side). The music map 4 is generated, in which the vertical axis represents the music tempo (the tempo is faster at the upper side and the tempo is lower at the lower side).
When the feature amount extraction unit 2 extracts the music feature amount, the mapping processing unit 3 grasps the impression that the user receives when listening to the music. The physical characteristics of the signal) are associated with the impression received by the user.

Parameter Physical Content Impression (1) Tempo Music Tempo Fierceness and Lightness (2) Beat Whiteness Tempo Fluctuation Human and Roughness (3) Basic Beat Rhythm Pattern Simple (4) Beat Strength 1 Accent strength in 8th note units (5) Beat strength 2 Accent strength in 16th note units Refinement (6) Beat strength ratio Ratio between 8th note and 16th note Annoyance (7) Average tone Number of pronunciations Calmness (8) Spectral change Tone change glittering

The mapping processing unit 3 maps the music mark of the music on the music map 4 according to the music feature amount when the parameter as the music feature amount is associated with the impression received by the user as described above. The process which performs is performed (step ST2).
For example, when music selection is possible based on “brightness” or “tempo”, the mapping position of the music mark (mapping in the vertical direction in the music map 4) according to the absolute evaluation value of the “tempo” parameter. Position).
That is, the larger the absolute evaluation value of the “tempo” parameter, the higher the position on the vertical axis of the music map 4 is determined. For example, if the absolute evaluation value of the parameter is “1”, the lowest position of the vertical axis, and if the absolute evaluation value of the parameter is “4”, the central position of the vertical axis and the absolute evaluation value of the parameter are “ If it is 7 ″, it is determined at the uppermost position on the vertical axis.
Also, the average value or weighted average value of absolute evaluation values of other parameters (for example, basic beat, beat intensity 1, beat intensity 2, beat intensity ratio, average number of sounds, and degree of spectrum change) are calculated, and the calculation result Accordingly, the mapping position of the music mark (mapping position in the horizontal axis direction in the music map 4) is determined.
That is, the larger the calculation result is, the more the position on the right side of the horizontal axis in the music map 4 is determined. For example, if the calculation result is the minimum value, the leftmost position on the horizontal axis, if the calculation result is an intermediate value, the center position of the horizontal axis, and if the calculation result is the maximum value, the rightmost position on the horizontal axis Determine the position.

When the mapping processor 3 maps the music mark onto the music map 4 as described above, the display processor 5 displays the music map 4 (step ST3).
The operation processing unit 7 monitors the operation of the dial key 6 by the user. When the display processing unit 5 displays the music map 4 and the user performs an operation of turning the dial key 6 (step ST4), the dial key 6 is measured (step ST5).
If the rotation of the dial key 6 is clockwise, the operation processing unit 7 performs a process of rotating the search hand P clockwise according to the amount of rotation (step T6).
On the other hand, if the rotation of the dial key 6 is counterclockwise, a process of rotating the search needle P counterclockwise according to the amount of rotation is performed (step T6).
FIG. 4 is an explanatory diagram showing the music map 4 when the dial key 6 is rotated clockwise from the state of FIG.

The music playback unit 8 monitors the positional relationship between the music mark mapped on the music map 4 and the search needle P, and as shown in FIG. When it overlaps with any music mark mapped on the map 4 (step ST7), the music data of the chorus section of the music corresponding to the music mark is acquired from the database 1, and the chorus section of the music is reproduced. Processing is performed (step ST8).
In the example of FIG. 5, since the music mark of music A and the search needle P overlap, the music data of the climax section of music A is acquired and the process of reproducing the climax section of music A is performed.
As a result, the climax section of the music reproduced by the music reproduction unit 8 is output from the speaker 9 as a sound, and the user can listen to the climax section of the music.
In this example, the music data of the chorus section of the music is obtained from the database 1. For example, when the feature amount extraction unit 2 analyzes the music data and extracts the feature amount of the music, the music chorus is extracted. The section may be detected and the music data of the chorus section may be stored in the database 1. However, since the process for detecting the music climax section itself is a known technique, a detailed description thereof will be omitted.

The music playback unit 8 listens to the chorus section of the music, determines that the music is the desired music, and presses the dial key 6 before, for example, the reproduction of the chorus section of the music is completed. When the music playback command is input (step ST9), the music data of the music is acquired from the database 1, and the entire playback is started from the beginning of the music (step ST10).
On the other hand, if the user does not input a music playback command before the playback of the chorus section of the music is completed (step ST9), the music is mapped to the position closest to the music within a preset range. The music chorus section is reproduced (step ST11).
In the example of FIG. 5, music marks of music B, C, and D are mapped in addition to music A, but the music closest to music A is music B, so the chorus section of music B Play.
Note that the music climax playback process is repeated until a music playback command is input. If the user does not input a music playback command before the music B climax playback is completed, Within the set range, the chorus section of music C mapped to the position closest to music B is reproduced.

  As is apparent from the above, according to the first embodiment, the mapping processing unit 3 that maps the music mark on the two-dimensional music map 4 according to the feature amount extracted by the feature amount extraction unit 2, and its An operation processing unit 7 that receives a rotation operation of the search needle P rotating on the music map 4 and performs a rotation process of the search needle P is provided, and the search needle P moves along with the rotation process of the operation processing unit 7. When it overlaps with any music mark mapped on the music map 4, the music chorus section corresponding to the music mark is played back. For example, from the viewpoint of “brightness” and “tempo” As a result, it is possible to easily search for favorite music.

  Also, according to the first embodiment, when the music playback instruction is received before the music chorus section is completely played, the entire music starts playing from the beginning of the music, while the music chorus section is started. If the music playback command is not received before the playback of the music is completed, the chorus section of the music on the music map 4 closest to the music is played back, so that the user does not have to perform further rotation operation. In addition, there is an effect that the search for favorite music can be continued.

  In the first embodiment, the music reproducing unit 8 reproduces the music chorus section corresponding to the music mark overlapping the search needle P. However, a part of the music to be reproduced is not necessarily music chorus. For example, a music intro section corresponding to a music mark overlapping with the search needle P may be reproduced.

In the first embodiment, although there is no particular mention, when there are a plurality of music marks on which the search needle P overlaps, the music mark with the highest priority is specified according to the setting contents of the music playback device, The chorus section of music corresponding to the music mark with the highest priority is reproduced. For example, if the setting content gives priority to the music mark close to the center of the music map 4, the chorus section of music corresponding to the music mark closest to the center is reproduced.
In addition, if the setting contents give priority to new music, the latest music chorus section is reproduced.

Embodiment 2. FIG.
In the first embodiment, the mapping processing unit 3 maps the music marks of all the music stored in the database 1 onto the music map 4. However, when the music search condition is given, the mapping process is performed. The unit 3 may map only the music mark of the music that matches the search condition on the music map 4.
For example, when a favorite music genre is given as a music search condition, only music marks of music belonging to the genre are mapped on the music map 4. The music genre can be extracted as attribute information of the music.
This makes it possible to search for music and to search for favorite music more quickly than in the first embodiment.

Embodiment 3 FIG.
In the first embodiment, the operation processing unit 7 rotates the search hand P in accordance with the rotation amount of the dial key 6. However, when an arbitrary point on the music map 4 is designated, the point is reached. The search needle P may be moved directly.
Specifically, when the music map 4 of FIG. 6 is displayed, for example, when the user touches the lower left of the display processing unit 5 with a finger, the operation processing unit 7 touches the user as shown in FIG. The search needle P is directly moved to the specified position.

At this time, when the search needle P moved to the position designated by the operation processing unit 7 overlaps with any music mark mapped on the music map 4, the music playback unit 8 is the same as in the first embodiment. Then, the music data of the chorus section of the music corresponding to the music mark is acquired from the database 1, and the chorus section of the music is reproduced.
When there is no music mark overlapping the search needle P, the music playback unit 8 basically does not perform the music climax playback process as in the first embodiment, but the search needle P When there is no overlapping music mark, the music mark closest to the search needle P may be specified, and the chorus section of music corresponding to the music mark may be reproduced. At this time, the music reproducing unit 8 moves the search needle P to the position where the nearest music mark is present.

  As apparent from the above, according to the third embodiment, when an arbitrary point on the music map 4 is designated, the search needle P is directly moved to that point. Even if the key 6 is not rotated, it is possible to search for favorite music.

Embodiment 4 FIG.
In the first embodiment, the music mark of all the music stored in the database 1 is mapped to the music map 4 with the same size “◯”. The history of the selected music may be stored, and for example, music having a higher frequency or frequency of selection in the past may be mapped to the music map 4 with a larger “◯” (see FIG. 8).
Alternatively, the previously selected music may be mapped to the music map 4 with “◯” larger than other music.

  As is apparent from the above, according to the fourth embodiment, when the entire music is reproduced by the music reproducing unit 8, the mapping processing unit 3 expands the occupied area of the music mark of the music in the music map 4. Since the music mark of the music that has a high possibility of being selected is overlapped with the search needle P, the favorite music can be searched more quickly than in the first embodiment. There is an effect.

In the fourth embodiment, the mapping processing unit 3 expands the occupied area of the music mark of the music in the music map 4 when the entire music is played back by the music playback unit 8. As in the first embodiment, all music marks are mapped to the music map 4 with the same size “◯”, and when any music mark overlaps the search needle P, the “○” of the music is expanded. Alternatively, the color of “O” of the music may be changed, or the “O” of the music may be changed to another shape (for example, “Δ”, “□”).
In this case, there is an effect that the user can quickly grasp music corresponding to the music mark overlapping with the search needle P.
Further, when the search needle P approaches the music mark, the “○” of the music is enlarged, the color of the “○” of the music is changed, or the “○” of the music is changed to another shape (for example, , “Δ”, “□”).

Embodiment 5 FIG.
In the fourth embodiment, when the mapping processing unit 3 maps the music marks of all the music to the music map 4 with “◯” having the same size, and “○” of any music overlaps the search needle P. In the above example, the “○” of the music is enlarged. When any “○” of the music overlaps the search needle P, the operation processing unit 7 operates the rotation of the search needle P by the dial key 6. You may make it change a touch.
Specifically, it is possible to adjust a friction coefficient between a dial switch (for example, a rotary shaft of the dial and a fixed receiving shaft into which the rotary shaft is inserted) that can adjust the sliding degree in the rotation direction. The dial key 6 is configured using a possible hardware switch, and when the music playback unit 8 detects an overlap of any music mark and the search needle P, the operation processing unit 7 adjusts the sliding state of the dial key 6. The operation feeling is changed so that the rotation operation feels heavy.
As a result, the user can quickly grasp that any music mark overlaps the search needle P.

Embodiment 6 FIG.
In the first embodiment, the operation processing unit 7 rotates the search needle P according to the rotation amount of the dial key 6, but the operation processing unit 7 is mapped on the search needle P and the music map 4. The distance from the music mark is measured, and when the distance from any music mark mapped on the music map 4 becomes a predetermined distance or less, the search needle P is moved to the position of the music mark. It may be.
FIG. 9 is a flowchart showing the processing contents of the music reproducing apparatus according to Embodiment 6 of the present invention.

Specifically, it is as follows.
Similar to the first embodiment, the operation processing unit 7 rotates the search needle P according to the rotation amount of the dial key 6. The distance from the music mark mapped to is measured (step ST21).
If the search needle P approaches any music mark mapped on the music map 4 and the distance from the search needle P is less than a predetermined distance, the operation processing unit 7 detects a music mark (step ST22). Then, the search needle P is moved to the position of the music mark (step ST23).
Thus, there is an effect that the music chorus section corresponding to the music mark can be reproduced without the user turning the dial key 6 until the search needle P overlaps the music mark.

Embodiment 7 FIG.
In the fifth embodiment, the operation processing unit 7 changes the operation feeling with respect to the rotation operation of the search needle P by the dial key 6 when any music mark overlaps the search needle P. When the music mark overlaps the search needle P, the music playback unit 8 may output the attribute information related to the music corresponding to the music mark from the speaker 9 as a voice.
Specifically, for example, when the music title name, artist name, album name, genre name, etc. are stored as attribute information related to music in the database 1, if any music mark overlaps the search needle P, The reproduction unit 8 reads out the song name, artist name, album name, genre name, etc. of the music corresponding to the music mark overlapping the search needle P.
Thereby, the user can quickly grasp the music corresponding to the music mark overlapping with the search needle P.

Embodiment 8 FIG.
In the first embodiment, the mapping processing unit 3 generates the two-dimensional music map 4 and maps the music marks of all the music stored in the database 1 to the two-dimensional music map 4. However, the two-dimensional music map 4 may be hierarchized to generate a three-dimensional music map according to the number of times of music playback or according to the release year of the music.
That is, the music stored in the database 1 is classified by the number of playbacks or by the release year of the music, and a plurality of two-dimensional music maps 4 are generated by the number of playbacks or by the release year. By arranging the two-dimensional music map 4 in a hierarchical manner, a three-dimensional music map is generated.

Specifically, for example, when generating a three-dimensional music map for each release year, the two-dimensional music map 4 to which the music mark of the latest music released in 2005 is mapped is arranged at the top level. Then, the two-dimensional music map 4 to which the music mark of the music released in 2004 is mapped is arranged in the lower layer.
Thereafter, the music maps 4 of each year are arranged in the lower hierarchy in the order of the release year, and the two-dimensional music map 4 to which the music mark of the music released in the oldest year is mapped is the lowest hierarchy. To be placed in.

When the mapping processing unit 3 generates a three-dimensional music map as described above, the display processing unit 5 firstly forms the two-dimensional music map 4 having the highest hierarchy (music mark of music released in 2005). Is displayed as a two-dimensional music map 4).
After that, when the user turns the dial key 6 and the search needle P goes around, the display processing unit 5 erases the currently displayed music map 4 and is arranged in a hierarchy one level lower than the music map 4. The two-dimensional music map 4 (two-dimensional music map 4 on which music marks of music released in 2004 are mapped) is displayed.
When the user turns the dial key 6 and the search needle P further goes around, the display processing unit 5 erases the currently displayed music map 4 and is arranged in a hierarchy one level lower than the music map 4. The two-dimensional music map 4 (two-dimensional music map 4 mapped with music marks of music released in 2003) is displayed.
In this way, the display processing unit 5 displays the two-dimensional music map 4 to which the music marks of music released in other years are mapped each time the search needle P makes a round.

  On the other hand, when generating a three-dimensional music map according to the number of times of reproduction, for example, a two-dimensional music map 4 to which a music mark of music with the number of times of reproduction of 10 or more is mapped is arranged in the top hierarchy, A two-dimensional music map 4 in which music marks of music with 9 to 5 times of playback are mapped is arranged in the lower layer, and music marks of music with the number of playbacks of less than 5 are mapped next. The two-dimensional music map 4 is arranged in the lower hierarchy.

When the mapping processing unit 3 generates a three-dimensional music map as described above, the display processing unit 5 firstly creates a two-dimensional music map 4 having the highest hierarchy (music having a playback count of 10 or more). A two-dimensional music map 4) on which the music mark is mapped is displayed.
After that, when the user turns the dial key 6 and the search needle P goes around, the display processing unit 5 erases the currently displayed music map 4 and is arranged in a hierarchy one level lower than the music map 4. The two-dimensional music map 4 (two-dimensional music map 4 mapped with music marks of 9 to 5 times of reproduction) is displayed.
When the user turns the dial key 6 and the search needle P further goes around, the display processing unit 5 erases the currently displayed music map 4 and is arranged in a hierarchy one level lower than the music map 4. The two-dimensional music map 4 (two-dimensional music map 4 to which the music mark of the music whose number of reproductions is less than 5 is mapped) is displayed.

  As is apparent from the above, according to the eighth embodiment, the two-dimensional music map 4 is hierarchized according to the number of times of music playback or according to the release year of the music so as to generate a three-dimensional music map. Since it comprised, there exists an effect which can search favorite music still more rapidly than the said Embodiment 1. FIG.

Embodiment 9 FIG.
In the first embodiment, the mapping processing unit 3 maps the music marks of all music to the music map 4 with the same size “◯”. However, for example, the music release year and the genre The color of the music “○” may be changed by artist or country.
In the first embodiment, when a music playback command is input before the playback of the music chorus section is completed, the music playback unit 8 starts playback from the beginning of the music. However, when the user turns the dial key 6 while playing the whole music, the music playback unit 8 turns the music fast (when the dial key 6 is turned to the right), or The music may be rewound (when the dial key 6 is turned counterclockwise).

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows the music reproducing apparatus by Embodiment 1 of this invention. It is a flowchart which shows the processing content of the music reproducing apparatus by Embodiment 1 of this invention. It is explanatory drawing which shows a music map. It is explanatory drawing which shows a music map when a dial key is rotated rightward from the state of FIG. It is explanatory drawing which shows the music mark which has overlapped with the search needle | hook P. FIG. It is explanatory drawing which shows a mode that arbitrary points are designated. It is explanatory drawing which shows a music map when the dial key is directly moved from the state of FIG. It is explanatory drawing which shows the music map to which the music mark from which an occupation area differs is mapped. It is a flowchart which shows the processing content of the music reproduction apparatus by Embodiment 6 of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Database, 2 feature-value extraction part (feature-value extraction means), 3 mapping process part (mapping means), 4 music map, 5 display process part, 6 dial key (rotation operation reception means), 7 operation process part (rotation operation) Reception means), 8 music playback section (music playback means), 9 speaker (music playback means).

Claims (9)

A feature quantity extracting means for extracting a music feature quantity, a mapping means for mapping a mark corresponding to the music on a two-dimensional music map in accordance with the music feature quantity extracted by the feature quantity extracting means, and a display has been the center of the music map accepting rotating operation of search needles which rotates as a fulcrum, a rotation operation receiving means for performing rotation processing of the search needle, the retrieval needle in accordance with the rotation process of rotating operation acceptance means When it overlaps with a mark corresponding to any music mapped on the music map, only a part of the music is played, and when the music playback command is received, the whole music starts playing from the beginning of the music And a music playback device.   2. The music reproducing apparatus according to claim 1, wherein when the music search condition is given, the mapping means maps only the mark corresponding to the music that matches the search condition on the music map.   2. The music reproducing apparatus according to claim 1, wherein the rotation operation accepting unit directly moves the search needle to the point when an arbitrary point on the music map is designated.   When the music playback means receives a playback instruction for the music before the playback of a part of the music is completed, the music playback means starts the entire playback from the beginning of the music, and before the playback of the part of the music is completed. 2. The music reproducing apparatus according to claim 1, wherein a part of the music on the music map closest to the music is reproduced if no instruction for reproducing the music is received.   5. The music reproducing apparatus according to claim 4, wherein the mapping means expands the area occupied by the mark corresponding to the music in the music map when the music is reproduced by the music reproducing means.   The rotation operation accepting unit changes an operation feeling for the rotation operation of the search needle when the search needle overlaps a mark corresponding to any music mapped on the music map. Music player.   The rotation operation accepting means measures the distance between the search needle and the mark corresponding to the music mapped on the music map, and the distance between the mark corresponding to any music mapped on the music map is 2. The music reproducing apparatus according to claim 1, wherein when the distance is equal to or less than a predetermined distance, the search needle is moved to a mark corresponding to the music.   The music playback means, when the search needle overlaps a mark corresponding to any of the music mapped on the music map in accordance with the rotation processing of the rotation operation accepting means, outputs attribute information related to the music as voice The music reproducing apparatus according to claim 1.   2. The music reproducing apparatus according to claim 1, wherein the mapping means generates a three-dimensional music map by hierarchizing a two-dimensional music map according to the number of times of music reproduction or according to the release year of the music.

Images