JP2020122949A - Karaoke device - Google Patents

Abstract

To provide a karaoke device that can determine whether fly-down singing is included in karaoke singing.SOLUTION: A karaoke device comprises: a singing pitch detection unit for detecting a singing pitch at each predetermined section from a singing voice signal obtained from karaoke song singing; and a fly-down singing determination unit for determining that fly-down singing is performed to a note when there are a horizontal section in which a predetermined number or more of sections continues with a pitch difference between two continuous singing pitches being within a predetermined range and a descending section in a section before the horizontal section in which the singing pitch descends from a singing pitch higher than the reference pitch of the note to a singing pitch at the start of the horizontal section under a predetermined condition, in the section including a plurality of detected pitches.SELECTED DRAWING: Figure 3

Description

The present invention relates to a karaoke device.

The karaoke device is equipped with a scoring function for scoring the skill of karaoke singing by comparing the singing voice data extracted from the singing voice input by the microphone and the reference data indicating the main melody of the music played in karaoke. There is.

For example, in Patent Document 1, pitch data and tone length data are extracted from a singing voice signal input from a microphone in accordance with a karaoke performance, and compared with a guide melody read in parallel with the karaoke performance to sing A technique for scoring and evaluating skill is disclosed.

In addition, some singers imitate the singing of a professional singer and sing by using special singing techniques such as hiccups, falls, fists, and shouts. Patent Literatures 2 to 5 disclose techniques for detecting such a special singing technique and evaluating the singing.

JP, 10-69216, A JP, 2005-107336, A JP, 2008-225115, A JP, 2008-268370, A JP 2012-078701A

By the way, as a technique used to enhance the expressiveness of karaoke singing, there are some that have not been known so far. If the singer uses such a technique, conventional karaoke devices cannot identify such a technique. In addition, even though it is a singing technique that gives the audience the impression that they are good, the conventional evaluation technique may have been subject to deduction.

An object of the present invention is to provide a karaoke device capable of specifying whether or not a karaoke song includes a fly-down song (described later).

The present inventor analyzed the singing pitch included in the singing voice signal that gives a "gentle" impression on the auditory sense, and from the singing pitch higher than the reference pitch of a certain note, the singing pitch gradually drops, and then the singing pitch It has been found that the variation shows a small variation. The present invention has been completed based on this discovery, and is a technique capable of specifying this singing by detecting the change in the pitch peculiar to this singing.

The transition of the singing pitch due to such karaoke singing is a gentle locus from the high singing pitch to the reference pitch of the note. The karaoke song showing such a pitch change is hereinafter referred to as "flydown song".

Specifically, the invention for achieving the above object is, from a singing voice signal obtained by singing a karaoke song, a singing pitch detection unit that detects a singing pitch for each predetermined section, and a plurality of the detected singing pitches. In the included section, a horizontal section in which the pitch difference between two consecutive singing pitches is within a predetermined range is equal to or more than a predetermined number, and a section before the horizontal section, which is a reference pitch of a note. From the high singing pitch to the singing pitch at the start of the horizontal section, if there is a descending section in which the singing pitch descends under a predetermined condition, a fly that determines that a fly-down singing is performed for the certain note. It is a karaoke apparatus which has a down singing determination part.
Other features of the present invention will be clarified by the description and drawings described later.

According to the present invention, it is possible to determine whether or not a karaoke song includes a flydown song.

It is a figure which shows the hardware structural example of the karaoke apparatus which concerns on embodiment. It is a figure which shows the software structural example of the karaoke main body which concerns on embodiment. It is a flowchart which shows the determination process of the L-shaped accent song which concerns on embodiment. It is the figure which showed the pitch difference of the singing pitch and the reference pitch of a note which concern on embodiment. It is the figure which showed the pitch difference of the singing pitch at the time of the start of a descending area candidate and the singing pitch detected after that which concern on embodiment. It is the figure which showed the pitch difference of two continuous song pitches which concerns on embodiment. It is a figure showing the relation between one note and a singing pitch concerning an embodiment.

<Embodiment>
The karaoke device 1 according to the embodiment will be described with reference to FIGS. 1 to 7.

== Karaoke device ==
The karaoke device 1 is a device for a karaoke performance and a singer to sing a karaoke song. The karaoke device 1 registers the karaoke pieces selected by the singer in the reservation queue and performs the karaoke performance in order. As shown in FIG. 1, the karaoke device 1 includes a karaoke body 10, a speaker 20, a display device 30, a microphone 40, and a remote control device 50.

The speaker 20 is configured to emit sound based on a sound emission signal from the karaoke body 10. The display device 30 is configured to display a video or image on the screen based on a signal from the karaoke body 10. The microphone 40 is a configuration for converting a singing voice of the singer (input voice to the microphone 40) into an analog singing voice signal and inputting it to the karaoke body 10. The remote control device 50 is a device for performing various operations on the karaoke body 10. The singer can use the remote control device 50 to select (reserve) a karaoke piece desired to be sung. Icons and the like for inputting instructions for various operations are displayed on the display screen of the remote controller 50.

The karaoke body 10 performs various controls related to karaoke singing, such as performance control of the selected karaoke piece, display control of lyrics and background video, and processing of a singing voice signal input through the microphone 40. As shown in FIG. 1, the karaoke body 10 includes a control unit 11, a communication unit 12, a storage unit 13, a sound processing unit 14, a display processing unit 15, and an operation unit 16. Each component is connected to the bus B via an interface (not shown).

The control unit 11 includes a CPU 11a and a memory 11b. The CPU 11a realizes various control functions by executing the operation program stored in the memory 11b. The memory 11b is a storage device that stores a program executed by the CPU 11a and temporarily stores various information when the program is executed.

The communication unit 12 provides an interface for connecting the karaoke body 10 to a communication line via a router (not shown).

The storage unit 13 is a large-capacity storage device that stores various types of data, and is, for example, a hard disk drive. The storage unit 13 stores a plurality of music data for performing a karaoke performance by the karaoke device 1.

The music data is provided with a music ID for identifying each karaoke music. The music data includes accompaniment data, reference data, and the like. The accompaniment data is the data that is the source of the karaoke performance sound. The accompaniment data includes information indicating the tempo at which the karaoke performance is performed. As the tempo, a predetermined value is set for each music piece. Reference data is data used as a standard when scoring a karaoke song by a singer. The reference data is composed of a plurality of notes (notes), and a predetermined pitch (reference pitch) is set for each note.

The storage unit 13 also stores lyrics telop data for displaying lyrics corresponding to each karaoke song on the display device 30 or the like, background image data such as a background image displayed on the display device 30 or the like during karaoke performance, and for each song. Performance time data indicating the karaoke performance time and attribute information of the music (information regarding the music such as singer name, lyric/composer name, and genre) are stored.

Based on the control of the control unit 11, the sound processing unit 14 controls the performance of the karaoke piece and processes the singing voice signal input through the microphone 40. The display processing unit 15 performs processing related to various displays on the display device 30 and the remote control device 50 under the control of the control unit 11. For example, the display processing unit 15 controls the display device 30 to display an image in which a lyrics telop or various icons are superimposed on a background image during the performance of a karaoke song. Alternatively, the display processing unit 15 causes the display screen of the remote control device 50 to display various icons for operation input. The operation unit 16 is composed of a panel switch and a remote control reception circuit, etc., and outputs operation signals such as a music selection signal and a performance stop signal to the control unit 11 in response to an operation of the panel switch of the karaoke apparatus 1 or the remote control device 50 by a singer. Output. The control unit 11 detects an operation signal from the operation unit 16 and executes a corresponding process.

(Software configuration)
FIG. 2 is a diagram showing a software configuration example of the karaoke body 10. The karaoke body 10 includes a song pitch detection unit 100, a flydown song determination unit 200, a presentation unit 300, and a scoring processing unit 400. The song pitch detection unit 100, the flydown song determination unit 200, the presentation unit 300, and the scoring processing unit 400 are realized by the CPU 11a executing a program stored in the memory 11b.

[Singing pitch detector]
The singing pitch detection unit 100 detects a singing pitch for each predetermined section from a singing voice signal obtained by singing a karaoke song.

Specifically, the singing pitch detection unit 100 analyzes the singing voice signal and detects the singing pitch. The singing pitch is detected in time series one sample at a time in frame units of a predetermined time length (for example, 10 to 20 msec). For example, when the predetermined time length is 20 msec, a 20 msec frame corresponds to a predetermined section in singing pitch detection. The song pitch detecting unit 100 sequentially outputs the detected song pitches to the flydown song determining unit 200. The detection of the singing pitch may be sequentially performed along with the singing of the karaoke piece, or may be collectively performed after the singing of one karaoke piece is completed.

[Flydown singing judgment section]
The fly-down singing determination unit 200 determines that the fly-down singing is performed for a certain note when the horizontal section and the descending section exist in the section including the plurality of detected song pitches.

The horizontal section is a section in which the pitch difference between two consecutive singing pitches is within a predetermined range and is continuous by a predetermined number or more. The predetermined range is a width of a shift between two consecutive singing pitches that is allowable in specifying the horizontal section. The predetermined number is the number of consecutive singing pitches having a pitch difference included in a predetermined range, which is the minimum necessary for specifying the horizontal section. The predetermined range and the predetermined number are set to arbitrary values in advance according to the degree of the specified flydown singing. For example, the predetermined range is ±1 cent to ±6 cent, and the predetermined number is 3 to 5.

The descending section is a section before the horizontal section, and is a section in which the singing pitch descends under a predetermined condition from a singing pitch higher than a reference pitch of a certain note to a singing pitch at the start of the horizontal section. The predetermined condition is a condition for specifying the descending section. As the predetermined condition, an arbitrary condition is set in advance according to the degree of the specified flydown singing (details will be described later).

Here, the determination process of the fly-down song will be described in detail with reference to FIGS. 3 to 7. FIG. 3 is a flowchart showing a determination process of fly-down singing. FIG. 4 shows a reference pitch BP of the note N set in the reference data of the karaoke piece X and a singing pitch for each predetermined section detected by analyzing the singing voice signal obtained by singing the karaoke piece X. It is a figure showing a pitch difference. FIG. 5 is a diagram showing a pitch difference between a song pitch of a descending section candidate (described later) and a song pitch detected after that. FIG. 6 is a diagram showing a pitch difference between two consecutive singing pitches with respect to the singing pitch for each predetermined section detected by analyzing the singing voice signal obtained by singing the karaoke piece X. FIG. 7: is the figure which showed the transition of the song pitch of a flydown song. The vertical axis in FIG. 7 indicates the singing pitch and the horizontal axis indicates the time, but the horizontal axis may be understood as a predetermined section of continuous time length (for example, 20 msec), and the singing pitch is detected for each predetermined section. The start time Ts is the sounding start timing of the note N, and the end time Te is the sounding end timing of the note N. The note generation start timing corresponds to the elapsed time up to the note when the performance start time of the karaoke piece is 0.

In the following description, the first singing pitch P(1) used when determining whether or not the fly-down singing for the note N is performed is the singing pitch detected 10 samples before the sounding start timing of the note N. (Singing pitch detected at the time of note N-1 before note N). The singing pitch P(1) corresponds to the singing pitch detected near the sounding start timing of the note N.

Also, in the following description, the pitch difference is indicated by the cent value. Note that the center value is a relative value, but in the following description, the scale C4 (frequency 261.626 Hz) is defined as 6000 cent in order to express the singing pitch as an absolute value.

First, the fly-down singing determination unit 200 selects, from among singing pitches detected in the vicinity of the sounding start timing of a certain note, a singing pitch whose pitch difference from the reference pitch of the certain note is within a first predetermined range as descending section candidates. Is specified as the singing pitch at the start of (step 10).

Specifically, the flydown song determination unit 200 obtains the pitch difference between the singing pitch detected near the sounding start timing of the note N and the reference pitch BP of the note N, and the pitch difference is within the first predetermined range. To determine if. The pitch difference BPd(n) between the singing pitch P(n) and the reference pitch BP of the note N is calculated by "P(n)-BP". The first predetermined range is set to an arbitrary value in advance according to the degree of flydown singing to be determined. For example, the first predetermined range is 50 cent to 300 cent. In the present embodiment, the first predetermined range is “100 cent to 200 cent”. The first predetermined range is a part of the “predetermined condition”. When determining whether or not the fly-down singing is performed on the note N, the difference from the reference pitch of the note N is obtained even if the singing pitch detected at the time of the note N-1.

According to the example of FIG. 4, the pitch difference BPd(1) between the singing pitch P(1) and the reference pitch BP of the note N is “+300 cent”. In this case, the flydown song determination unit 200 determines that the pitch difference BPd(1) is not within the first predetermined range (100 cent to 200 cent). On the other hand, the pitch difference BPd(2) between the singing pitch P(2) detected next to the singing pitch P(1) and the reference pitch BP of the note N is “+172cent”. In this case, the flydown song determination unit 200 determines that the pitch difference BPd(2) is within the first predetermined range (100 cent to 200 cent). In this case, the flydown song determination unit 200 specifies the song pitch P(2) as the song pitch at the start of the descending section candidate. The flydown song determination unit 200 does not calculate the pitch difference between the subsequent song pitches and the reference pitch of the note N.

Next, the fly-down singing determination unit 200 determines that, of the singing pitches detected after the singing pitch at the start of the descending section candidate, the pitch difference from the singing pitch at the beginning of the descending section candidate is the first. A singing pitch smaller than a predetermined value is specified as a singing pitch at the end of the descending section candidate (a singing pitch at the end of the descending section candidate is specified, step 11).

As the first predetermined value, an arbitrary value is set in advance according to the degree of flydown singing to be judged. The first predetermined value is, for example, −50 to −150 cent. The first predetermined value in this embodiment is assumed to be "-100 cent". The first predetermined value is a part of the “predetermined condition”.

In the above example, the flydown singing determination unit 200 detects a singing pitch detected after the singing pitch P(2) specified as the singing pitch at the start of the descending section candidate, and the singing pitch at the beginning of the descending section candidate. Find the pitch difference between.

According to the example of FIG. 5, it is the singing pitch P(27) that the pitch difference with the singing pitch P(2) first becomes smaller than -100 cent. Therefore, the flydown song determination unit 200 specifies the song pitch P(27) as the song pitch at the end of the descending section candidate.

By the processing of step 10 and step 11, the flydown song determination unit 200 sets the song pitch P(2) as the song pitch at the start of the descending section candidate and sets the song pitch P(27) as the song at the end of the descending section candidate. The descending section candidate DC to be the pitch is specified (specifying the descending section candidate, step 12).

Next, the fly-down singing determination unit 200 determines that the pitch difference between two consecutive singing pitches is within the second predetermined range in the section including the singing pitch detected after the singing pitch at the end of the descending section candidate. A section that is within the range and continues for a predetermined number or more is specified as a horizontal section (horizontal section specification, step 13).

Specifically, the flydown song determination unit 200 obtains the pitch difference between two consecutive song pitches with respect to the song pitch detected after the song pitch at the end of the descending section candidate, and the pitch difference is within a predetermined range. Determine if The pitch difference Pd(n) between two consecutive singing pitches P(n-1) and P(n) is calculated as "P(n)-P(n-1)". The predetermined range in this embodiment is “±5 cent”.

According to the example of FIG. 6, the pitch difference Pd(27) between the singing pitch P(27) at the end of the descending section candidate DC and the singing pitch P(28) detected next is “−6 cent”. .. In this case, the flydown song determination unit 200 determines that the pitch difference Pd(27) is not within the predetermined range. On the other hand, the pitch difference Pd(29) between the singing pitch P(29) and the next detected singing pitch P(30) is "-5cent". In this case, the flydown song determination unit 200 determines that the pitch difference Pd(29) is within the predetermined range.

Further, the fly-down song determination unit 200 sequentially obtains pitch differences for two consecutive detected song pitches and determines whether or not they are within a predetermined range. At this time, the fly-down singing determination unit 200 determines whether or not a pitch difference within a predetermined range continues for a predetermined number or more. When the number of consecutive singing is equal to or more than a predetermined number, the fly-down singing determination unit 200 sets the first singing pitch used when obtaining the pitch difference within the predetermined range as the singing pitch at the start of the horizontal section, and determines the last singing of a predetermined number in succession. Let the pitch be the singing pitch at the end of the horizontal section. The predetermined number in this embodiment is “3”.

According to the example of FIG. 6, the pitch difference within the predetermined range (±5 cent) is at least the pitch from the pitch difference Pd(31) determined to be second within the predetermined range after the pitch difference Pd(29). Three consecutive differences up to the difference Pd (33). In this case, the flydown singing determination unit 200 sets the singing pitch P(31) used when obtaining the pitch difference Pd(31) as the singing pitch at the start of the horizontal section and determines the pitch difference Pd(33). The horizontal section HZ in which the used song pitch P(33) is the song pitch at the end of the horizontal section is specified.

Further, the fly-down singing determination unit 200 determines that at least one of the pitch differences between two consecutive singing pitches is the second pitch between the singing pitch at the start of the descending section candidate and the singing pitch at the start of the horizontal section. It is determined whether or not it is less than or equal to a predetermined value (step 14).

The second predetermined value is set to an arbitrary value in advance according to the degree of flydown singing to be judged. For example, the second predetermined value is -5cent to -20cent. In the present embodiment, the second predetermined value is "-10cent". The second predetermined value is a part of the “predetermined condition”.

According to the example of FIG. 6, between the singing pitch P(2) at the start of the descending section candidate and the singing pitch P(31) at the start of the horizontal section, for example, the singing pitch P(19) and the singing pitch P The pitch difference Pd (19) with respect to (20) becomes -10 cent or less. In this case, the flydown song determination unit 200 determines that the pitch difference Pd(19) is equal to or less than the second predetermined value (-10 cent).

Next, the fly-down singing determination unit 200 determines a positive value of the pitch differences between two consecutive singing pitches from the singing pitch at the start of the descending section candidate to the singing pitch at the start of the horizontal section. It is determined whether or not what is taken is less than a predetermined ratio (step 15).

The predetermined ratio is set to an arbitrary value in advance according to the degree of flydown singing to be judged. For example, the predetermined ratio is 20% to 30%. In this embodiment, the predetermined ratio is “25%”. The predetermined ratio is a part of the “predetermined condition”.

According to the example of FIG. 6, between the singing pitch P(2) at the start of the descending section candidate and the singing pitch P(31) at the start of the horizontal section, of the total pitch difference (29 pieces), There are seven pitch differences that take values. That is, the ratio of the pitch difference that takes a positive value is about 24%. Therefore, the fly-down song determination unit 200 determines that the pitch difference having a positive value is less than the predetermined ratio.

In this case, the flydown song determination unit 200 specifies from the singing pitch at the start of the descending section candidate to the singing pitch at the beginning of the horizontal section as the descending section (specifying the descending section, step 16). According to the above example, the flydown song determination unit 200 sets the singing pitch P(2) at the start of the descending section candidate as the singing pitch at the beginning of the descending section, and the singing pitch P(31) at the start of the horizontal section. The descending section DZ in which is the song pitch at the end of the descending section is specified.

When the horizontal section and the descending section exist, the flydown song determination unit 200 determines that the flydown song is being performed (flydown song determination, step 17). FIG. 7 shows a flydown song composed of a horizontal section HZ and a descending section DZ.

In addition, when the descending section or the horizontal section cannot be specified, the flydown singing determination unit 200 determines that the flydown singing is not performed for the note N.

[Presentation section]
The presentation unit 300 presents the determination result of the fly-down song determination unit 200 to the singer. For example, when the determination result that the fly down singing is performed on the note N is input, the presentation unit 300 performs the fly down singing near the guide melody image corresponding to the note N displayed on the display device 30. An icon to the effect can be displayed. The guide melody image displays the melody of the karaoke piece as an image in order to support the singer's singing karaoke. A known method can be used to display the guide melody image (see, for example, JP 2004-205817 A).

Note that the presentation unit 300 can also display only the icon indicating that the fly-down song has been performed, regardless of the guide melody image. Alternatively, the presentation unit 300 may notify the fact that the fly-down song is performed by voice (applause, cheers, etc.) via the speaker 20 instead of displaying the icon indicating that the fly-down song is performed.

[Scoring unit]
The scoring processing unit 400 compares the singing voice signal obtained by singing the karaoke song with the reference data of the karaoke song, and calculates the score value. A known method can be used for the process of calculating the score value. For example, the scoring processing unit 400 performs scoring processing on the accuracy of the singing pitch based on the singing pitch based on the singing voice signal input from the microphone 40 and the reference pitch based on the reference data.

Here, the scoring processing unit 400 according to the present embodiment, when the scoring result of a certain note is determined to be unacceptable, and when the flydown singing is performed for the certain note, the scoring result of the certain note is Judge as pass. As shown in FIG. 7, the fly-down singing has a large deviation from the reference pitch of the note, and therefore there is a high possibility that the fly-down singing will be rejected according to a general scoring process. Therefore, in the scoring processing unit 400, even when the scoring result of a certain note is unacceptable, the flydown singing determination unit 200 determines that the flydown singing has been performed for the certain note. , A certain note is judged as a pass.

As is clear from the above, the karaoke device 1 according to the present embodiment, the singing pitch detection unit 100 that detects the singing pitch for each predetermined section from the singing voice signal obtained by singing the karaoke song, and the detected plurality. Among the sections including the singing pitches, a horizontal section in which a section in which the pitch difference between two consecutive singing pitches is within a predetermined range is continuous for a predetermined number or more, and a section before the horizontal section, which is the note N If there is a descending section in which the singing pitch falls under a predetermined condition from the singing pitch higher than the reference pitch to the singing pitch at the start of the horizontal section, it is determined that the fly-down singing for the note N is being performed. And a flydown singing determination unit 200. According to such a karaoke device 1, it is possible to determine whether or not the karaoke song includes a fly-down song.

More specifically, the flydown singing determination unit 200 selects a singing pitch whose pitch difference from the reference pitch of the note N is within the first predetermined range among the singing pitches detected near the sounding start timing of the note N. Of the singing pitches detected after the starting singing pitch and after the starting singing pitch, the singing pitch at the end whose pitch difference from the singing pitch at the beginning is first smaller than the first predetermined value The pitch difference between two consecutive singing pitches is within the second predetermined range in the section including the singing pitch detected after the ending singing pitch by specifying the descending section candidate as the pitch, and At least one of the two consecutive pitch differences between the singing pitches at the start of the descending section candidates and the singing pitch at the start of the horizontal section is specified as a horizontal section that is continuous for a predetermined number or more. When the difference between the second predetermined value and the pitch difference between the two continuous singing pitches is less than the predetermined ratio, the singing pitch at the start of the descending section candidate is set to the horizontal section. It specifies up to the singing pitch at the start as the descending section. By performing such a process by the fly-down song determination unit 200, it is possible to determine whether or not the karaoke song for the note N includes a fly-down song.

Furthermore, in the karaoke apparatus 1 according to the present embodiment, when the scoring result of the note N is determined to be unacceptable, and when the flydown singing is performed on the note N, the scoring result of the note N is determined to be pass. It has a scoring processing unit 400. According to such a karaoke apparatus, it is possible to avoid a scoring result that is not reflected even though the singing technique called fly-down singing is used.

<Other>
In the above embodiment, the flydown singing is determined including the singing pitch detected before the sounding start timing of the note N, but the present invention is not limited to this. For example, when performing a fly-down singing on the note N, the fly-down singing may be started at a timing after the sound generation start timing of the note N. Therefore, the fly-down singing determination unit 200 may determine whether or not there is a fly-down singing for the note N by using the singing pitch detected after the sounding start timing of the note N.

Further, it is possible to provide the determination processing of the fly-down singing described in the above embodiment as a program. For example, the program causes a computer (for example, a karaoke device) to detect a singing pitch for each predetermined section from a singing voice signal obtained by singing a karaoke song, and to detect a section including a plurality of detected singing pitches. , A horizontal section where a pitch difference between two consecutive singing pitches is within a predetermined range for a predetermined number or more, and a singing pitch higher than a reference pitch of a certain note, which is a section before the horizontal section. When there is a descending section in which the singing pitch falls under a predetermined condition up to the singing pitch at the start of the horizontal section, it is determined that the flydown singing for a certain note is being performed.

It is also possible to supply the program to the computer using a non-transitory computer readable medium with an executable program thereon. Examples of the non-transitory computer-readable medium include a magnetic recording medium (for example, a flexible disk, a magnetic tape, a hard disk drive), a CD-ROM (Read Only Memory), and the like.

The above embodiments are presented as examples and do not limit the scope of the invention. The above configurations can be appropriately combined and implemented, and various omissions, replacements, and changes can be made without departing from the scope of the invention. The above-described embodiments and modifications thereof are included in the invention described in the claims and equivalents thereof as well as included in the scope and the gist of the invention.

DESCRIPTION OF SYMBOLS 1 Karaoke device 10 Karaoke body 11 Control part 100 Singing pitch detection part 200 Fly down singing determination part 300 Presentation part 400 Scoring processing part

Claims (3)

From a singing voice signal obtained by singing a karaoke song, a singing pitch detection unit that detects a singing pitch for each predetermined section,
Among the sections including the plurality of detected singing pitches, a section in which a pitch difference between two consecutive singing pitches is within a predetermined range is a predetermined number or more in succession, and a section before the horizontal section. By the singing pitch higher than the reference pitch of a certain note to the singing pitch at the start of the horizontal section, a descending section in which the singing pitch descends under a predetermined condition, and if there is a flydown singing for the certain note, A flydown singing determination unit that determines that it is being performed,
Karaoke device having a. The flydown singing determination unit,
Of the singing pitches detected near the sounding start timing of the certain note, the singing pitch having a pitch difference from the reference pitch of the certain note within the first predetermined range is set as the starting singing pitch, and the singing at the starting time is performed. Of the singing pitches detected after the pitch, the descending section candidate whose singing pitch at which the pitch difference with the singing pitch at the start is first smaller than the first predetermined value is the singing pitch at the end is specified,
In the section including the singing pitch detected after the ending singing pitch, the pitch difference between two consecutive singing pitches is within the second predetermined range, and the section in which the number of consecutive singing pitches is equal to or more than the predetermined number is horizontal. Specified as a section,
At least one of the pitch differences between two consecutive singing pitches is equal to or less than a second predetermined value between the singing pitch at the start of the descending section candidate and the singing pitch at the start of the horizontal section, and If less than a predetermined ratio among the pitch differences between two consecutive singing pitches, the descent is performed from the singing pitch at the start of the descending section candidate to the singing pitch at the start of the horizontal section. The karaoke device according to claim 1, wherein the karaoke device is specified as a section. If it is determined that the scoring result of the certain note is unacceptable, and if it is determined that the flydown singing for the certain note is performed, the scoring processing unit that determines the scoring result of the certain note as pass. The karaoke apparatus according to claim 1 or 2, further comprising:

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