JPH0344310B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention is used with an audio signal recording and reproducing device such as a ``karaoke device'' to convert an audio signal sung by a user into a reproduced audio signal from a reference magnetic tape or the like. The present invention relates to a scoring device that automatically scores a user's singing ability by comparing it with the user's singing ability.

Configuration of conventional examples and their problems As a field of audio equipment, the music signal played by a musical instrument recorded on a recording medium such as a magnetic tape is reproduced and amplified, and when an aeser sings along with the signal, the above-mentioned music is reproduced. There is what is commonly called a ``karaoke device,'' which mixes with the signal and amplifies the sound, and is widely used for home and business use.

By singing using the above-mentioned "karaoke device," the user can gain joy and satisfaction, but in recent years, the number of people who want to improve their singing ability has increased, and the number of people who want to improve their singing ability has increased. Some people seek guidance from singing teachers for this purpose, but this is not possible for everyone, and audio multiplex recording media is rapidly becoming popular as a way to study singing on your own. . For example, in the case of a magnetic tape, this audio multiplexing type recording medium is a first track 10 on a magnetic tape 1, as shown in FIG.
A vocal signal from a singer or the like is stored in the first track 102, and a performance music signal from a musical instrument or the like is stored in the second track 102. When using this magnetic tape,
An audio multiplexing type "karaoke device" having the configuration shown in FIG. Means 2, magnetic head 301 and amplifier 302
The tape is reproduced by a second tape reproducing means 3 consisting of a microphone 401 and an amplifier 40
The mixed amplifier 5 mixes and power-amplifies the output of the microphone input means 2, and outputs the signal from the speaker 6 as an acoustic signal.

It is said that you can improve your singing ability by listening to vocal signals recorded on a recording medium using the above device and practicing singing along with the vocal signals yourself, but why should you practice? However, the drawback is that the user does not know how close his or her singing is to the model vocal signal singing style, or in other words, how much his or her singing ability has improved. Also, even if the user sings in the wrong way, the user may not be aware of it, and when practicing individually, there will naturally be a limit, and the user may lose interest and desire to practice. It has the disadvantage that it often ends up being damaged.

Purpose of the invention The present invention solves the above-mentioned conventional problems.
The vocal signal recorded on an audio multiplex recording medium etc. is compared with the user's singing voice signal, and the degree of matching is calculated and displayed as a score, which serves as an objective evaluation method for the user's singing ability. ,
In particular, it is possible to more accurately score and calculate the degree of matching, and
To provide a scoring device that calculates the score up to that point even while singing.

Structure of the Invention The scoring device of the present invention includes a first scale change detection means for detecting a change in the pitch of a scale of a first audio signal to be input, and a change in pitch of a scale of a second audio signal to be input. a second scale change detection means for detecting the number of pitch changes in the scale of the first audio signal; a first counting storage means for counting and storing the number of pitch changes in the scale of the first audio signal; a second count storage means for counting and storing , a first pause detection means for detecting a no-signal portion of the first audio signal, and a second pause detection means for detecting a no-signal portion of the second audio signal. and,
a third counting storage means for counting and storing the number of times a pause is detected by the second pause detection means; Pause simultaneous release detection means detects whether or not the pause of the first audio signal is also canceled at substantially the same time by looking at output information of the detection means; a fourth count storage means for counting and storing the number of times that the pause simultaneous release detection means detects that the pause is almost simultaneously released, and the information stored in the first count storage means and the information stored in the second count storage means. Each time a pause is detected by the second pause detection means, the information stored in the table is compared with the information stored in the third count storage unit and the information stored in the fourth count storage unit. The second
and a score calculation means for calculating as a score the degree to which the first audio signal matches the second audio signal each time a pause is detected by the pause detection means of the invention. By using the audio signal of the user singing as the first audio signal and the reproduction audio signal of the vocal signal recorded on the recording medium that serves as a song model as the second audio signal, the audio signal of the user singing can be transferred to the recording medium. Each time a pause in the vocal signal is detected, the score up to that point is calculated to determine how well the vocal signal matches the reproduced audio signal, so the user can compare his or her own singing ability with the vocal signal on the recording medium. By looking at the level of the singer's singing ability and changes in the score, the user can recognize any deficiencies in his or her own singing ability.

DESCRIPTION OF THE EMBODIMENT FIG. 3 is a block diagram showing an embodiment of the present invention. 4 is a microphone input means for converting the user's singing voice into an electrical signal and amplifying it; 401 is a microphone; and 402 is an amplifier. 2 is a first magnetic tape reproducing means for reproducing a vocal signal recorded on an audio multiplexing recording medium; 201 is a magnetic head; and 202 is an amplifier. Reference numeral 7 denotes a first waveform converting means, which converts the voice sung by the user into a pulse signal. Reference numeral 8 denotes a second waveform converting means, which converts the vocal signal of the recording medium into a pulse signal. Reference numeral 9 denotes a first scale change detection means, which detects changes in the scale of the voice sung by the user. Reference numeral 10 denotes a second scale change detection means, which detects a change in the scale of the vocal signal. Reference numeral 11 denotes a first counting storage means, which counts and stores the number of changes in pitch of the pitch of the voice sung by the user. Reference numeral 12 denotes a second counting storage means, which counts and stores the number of changes in pitch of the scale of the vocal signal.

Reference numeral 13 denotes a first pause detection means, which detects pauses caused by breaths or the like in the user's singing voice. Reference numeral 14 denotes a second pause detection means, which detects a pause due to a pause or the like in the vocal signal on the magnetic tape. Reference numeral 41 denotes a third counting storage means, which counts and stores the number of pauses in the vocal signal on the magnetic tape based on the output of the second pause detection means. Reference numeral 15 denotes a pause simultaneous release detection means, which detects when the pause in the vocal signal is canceled, that is, when the vocal signal changes from a no-signal state to a signal-present state, the audio signal sung by the user is also released from the pause at approximately the same time. This is to detect whether or not. Reference numeral 16 denotes a fourth counting storage means for counting and storing the number of times that the pause simultaneous release is detected by the pause simultaneous release detection means.

17 is a score calculation means that compares and calculates the number of changes in the pitch of the voice sung by the user and the number of changes in the pitch of the vocal signal each time a pause is detected by the second pause detection means; Furthermore, a pause is detected by the second pause detection means according to the ratio between the number of times that a pause in the vocal signal is detected and the number of times that the pause in the audio signal sung by the user is detected almost simultaneously with the cancellation of the pause in the vocal signal. A score is calculated based on the degree to which the audio signal sung by the user matches the vocal signal on the magnetic tape each time the user sings.

FIG. 4 is a block diagram showing the specific configuration of this embodiment, which includes detecting scale changes in the voice sung by the user and counting and storing the number of changes, detecting scale changes in the vocal signal, counting and storing the number of changes, and detecting scale changes in the vocal signal and counting and storing the number of changes. Functions include detecting a pause, counting and storing the number of times it has been detected, detecting a pause in the user's singing signal, detecting the release of a pause in the user's singing signal almost simultaneously with the release of a pause in the vocal signal, counting and storing the number of times it has been detected, and calculating a score. This was realized by the microcomputer 15.

FIG. 5 shows an actual circuit example of the first waveform converting means 7. Normally, the same circuit is often used for the first waveform converting means 7 and the second waveform converting means. The circuit of the first waveform converting means 7 will be representatively explained with reference to the operational diagram of FIG. 6.

701 is an input terminal, 702, 704, 705,
708, 710, 711 are resistors, 703, 70
6 and 709 are capacitors, 707 is an operational amplifier (hereinafter abbreviated as OP amplifier), 712 is a transistor, and 713 is an output terminal.

OP amplifier 707 and resistors 702, 704, 7
05 and capacitors 703 and 706 constitute a low-pass active filter, which removes high-frequency components of the audio electrical signal as shown in Figure 6a input to the input terminal 701, and at the same time outputs the OP amplifier. Necessary signal amplification is performed by the amplifying action of 707, and furthermore, a time constant circuit composed of resistor 708 and capacitor 709 supplementally removes high-frequency components that are not sufficiently removed by the active filter. In this way, the audio electrical signal shown in FIG.
12, the pulse waveform is converted into a pulse waveform as shown in FIG. 6c. In this way, the first waveform converting means 7 converts the user's singing voice signal, which is the output of the microphone input means 4, into a pulse waveform, and the second waveform converting means 8 similarly converts the voice signal sung by the user into a pulse waveform. The vocal signal that is the output of is also converted into a pulse waveform.

The operation of this embodiment will be explained below based on the flowchart shown in FIG. 7 showing the main part of the processing operation of the microcomputer.

First, it is assumed that the power of the device is turned on and that the memory elements and the like inside the microcomputer 15 have also been initialized. The user's singing voice signal becomes an electric voice signal by the microphone input means 4,
The pulse signal is amplified and converted into a pulse signal by the first waveform converting means 7, which is input to the microcomputer 18. In step 20, the time width of the input pulse is converted into a digital quantity. That is, by counting the "H" period of the pulse signal shown in FIG. 6c using the microcomputer's own clock signal, the time width of the input pulse can be converted into a digital quantity. In this way, the time width from t ₁ to t ₂ , the time width from t ₃ to t ₄ , and the time width from t ₅ to t ₆ in FIG.
Conversion is performed in the order of time width... still,
If this time width increases, it indicates that the scale has become lower, and if it decreases, it indicates that the scale has become higher.

Next, in step 21, it is determined whether the time width of the pulse signal has increased compared to the previous time width. That is, in the pulse signal waveform of Fig. 6c, from _t3 to
If this is the time when the time width of t ₄ is detected, has the time width from t ₃ to t ₄ increased compared to the time width from t ₁ to t ₂ , which is the data of the previous time width? If the time width is increasing, step 23 indicates the number of times the scale of the user's audio signal has decreased.
Increase _N11 by 1, and if the time width has not increased, proceed to step 22. In step 22, it is determined whether the time width of the pulse signal has decreased compared to the previous time width, and if the time width has decreased, step 25 indicates the number of times the scale of the user's audio signal has increased. Increase _N13 by 1, and if the time width has not decreased, proceed to step 24, and increase _N12 , which indicates the number of times the scale of the user's audio signal does not change, by 1.
increase only.

As mentioned above, steps 20, 21, and 22 realize the function of the first scale change detection means 9, and steps 23,
24 and 25 realize the function of the first count storage means 11.

On the other hand, the vocal signal stored on the magnetic tape 1, which is an audio multiplexing recording medium, is reproduced by the first magnetic tape reproduction means 2, converted into a pulse signal by the second waveform conversion means 8, and then sent to the microcomputer 18. In step 26, it is determined whether or not the vocal signal is in a rest state by looking at the pulse signal obtained from the vocal signal.

If the vocal signal is in a pause state, proceed to step 27 and determine whether the vocal signal has started to pause, that is, there was a vocal signal until just before, and now there is no signal for the first time, and if the vocal signal has started to pause. In step 28, _N3 , which indicates the number of pauses in the vocal signal, is incremented by one. That is, steps 26 and 27 realize the function of the second pause detection means 14, and step 28 realizes the function of the third count storage means 41.

After step 28, a subtotal of the scores up to that point is calculated in step 41, and the method of this calculation will be described later. Step 41 is followed by a step
42, the value of ΣN _o indicating the total number of scale change detections up to that point is calculated as ΣN _o = N _o-1 + N ₂₁ + N ₂₂ +
It is calculated based on the formula N ₂₃ , and in step 43, each of N ₁₁ , N ₁₂ , N ₁₃ , N ₂₁ , N ₂₂ , and N ₂₃ is all cleared to 0. Then, in step 39, the total score up to that point is calculated, and in step 40, the score is displayed. Note that the calculation of the total score will be described later.

Conversely, if it is determined in step 26 that the vocal signal is not in a rest state, the vocal signal is released from the rest state in step 29, that is, the vocal signal has been in a no-signal state until just before, and now becomes a signal state for the first time. Determine whether or not.

Step 30 if the vocal signal is unpaused
Therefore, the process proceeds to step 31 only when the user's singing voice signal input from the microphone is released from the pause almost at the same time. step
In step 31, N ₄ , which indicates the number of times the pause in the voice signal sung by the user is released almost simultaneously with the release of the pause in the vocal signal, is increased by 1. That is, step 30 realizes the function of the first pause detection means 13, steps 26, 29, and 30 realize the function of the pause simultaneous release detection means 15, and step 31 realizes the function of the fourth count storage means 16.

Next, after converting the time width of the input pulse into a digital quantity in step 32, it is determined in step 33 whether or not the time width has increased compared to the previous time width, and if the time width has increased, the step 35, _N21 indicating the number of times the scale of the vocal signal has become lower is increased by 1, and if the time width has not increased, the process proceeds to step 34. In step 34, it is determined whether the time width of the pulse signal has decreased compared to the previous time width, and if the time width has decreased, step 37 indicates the number of times the scale of the vocal signal has increased.
_N23 is increased by 1, and if the time width has not decreased, the process proceeds to step 36, where _N22 , which indicates the number of times the scale of the vocal signal does not change, is increased by 1.

As mentioned above, steps 32, 33, and 34 realize the function of the second scale change detection means 10, and steps 35,
36 and 37 realize the function of the second count storage means 12.

Next, in step 38, it is determined whether it is time to end the scoring. The decision to end the scoring may be based on push button switch information that specifies the end of the scoring, or by detecting the presence or absence of performance music signals recorded on the magnetic tape 1. The scoring may end when the music signal disappears. It is also possible to record an end signal indicating the end of the song in advance, and use the point in time when the end signal is detected or the point in time when the end of the magnetic tape is detected.

If it is not yet time to finish scoring, proceed to step 38.
Then proceed to step 20 or step 26,
N ₁₁ which is the change data of the time width of the pulse signal,
Data collection of N ₁₂ , N ₁₃ , N ₂₁ , N ₂₂ , N ₂₃ , the number of pauses in the vocal signal N ₃ , and the number of times N ₄ the voice signal sung by the user also came out of the pause at almost the same time as the pause in the vocal signal was released. is performed, and each time a pause in the vocal signal is detected, the score up to that point is displayed.

Next, the score calculation in steps 39 and 41 will be explained. Step 39, together with step 41, has the function of score calculation means 17, and the score calculation is based on time width change data of the pulse signal created from the user's voice signal and the vocal signal on the magnetic tape 1.
The subtotal of scores based on N ₁₁ , N ₁₂ , N ₁₃ , N ₂₁ , N ₂₂ , N ₂₃ , the number of pauses in the vocal signal N ₃ , and the audio signal sung by the user is also released at the same time as the pause in the vocal signal is released. It is calculated based on the number of times N ₄ has been achieved, and the maximum score is 100 points. First, a basic formula will be explained as an example of a formula for calculating the score. With α, β, and γ as constants, the score P
, P=100×{N ₂₁ +N ₂₂ +N ₂₃ )−(α|N ₁₁
−N ₂₁ | +β|N ₁₂ −N ₂₂ |+γ|N ₁₃ −N ₂₃ |)}
/(N ₂₁ +N ₂₂ +N ₂₃ )...It is defined as an expression.

The score according to the above formula is N ₁₁ = N ₂₂ ,
Full marks are given when N ₁₂ = N ₂₂ and N ₁₃ = N ₂₃ .
The score is 100 points, and this is for all three items: the number of changes in the scale of the user's singing audio signal and the number of changes in the scale of the vocal signal on the magnetic tape: high change, low change, and unchanged. If the number of times is the same, that is, if the change in the scale of the voice signal sung by the user is the same as the change in the scale of the vocal signal on the magnetic tape 1, a full score will be given.

On the other hand, in the above formula, N ₁₁ = 0, N ₁₂ =
The constants α, β, and γ are determined so that the score is 0 when N ₁₃ =0. This is to ensure that the score becomes 0 when the user does not sing at all.

Next, an example of a score calculation formula that is one step more advanced than the score calculation formula in the above formula will be explained.
Similarly to the calculation formula above, α, β, and γ are constants, and K ₁ and K ₂ are also constants, and the score P is calculated as follows: P=[K ₁ × {(N ₂₁ +N ₂₂ +N ₂₃ )−(α|N
₁₁ −N ₂₁ |+β|N ₁₂ −N ₂₂ | +γ|N ₁₃ −N ₂₃ |)}/(N ₂₁ +N ₂₂ +N _2
3 )+K ₂ ×N ₄ /N ₃ ]...Define it as the formula.

The first term in the above equation is the number 100 in the above equation replaced with the constant K ₁ , so
Explanation will be omitted. The second term of the equation, K ₂ ×N ₄ /
To explain the meaning of N ₃ , N ₃ is the number of times the vocal signal pauses, and N ₄ is the number of times the vocal signal pauses and the voice signal sung by the user stops at approximately the same point. Shows the number of times it has worn out.

To be more specific, _N3 is the number of times the singer in the vocal signal, which serves as a model for scoring, takes a breather or does not sing, and _N4 is the number of times the singer in the vocal signal takes a breather or does not sing. From the state of not singing,
It shows the number of times the user started singing from a state where the user was not singing at the same time when the user started singing, and
Since there is a relationship of N ₄ ≦N ₃ , N ₄ /N ₃ is a positive number less than 1, and N ₄ /N ₃ means that the vocal signal and the user's sung audio signal start at almost the same time. It shows the rate at which singing ability has developed, and can be thought of as an element that shows the sense of rhythm and tempo matching of singing ability. This N ₄ /N ₃ is multiplied by the constant K ₂ and added to the first term of the above formula, and the constant α is set so that 100 points are the perfect score.
By setting β, γ, K ₁ , and K ₂ , it is possible to calculate a score more accurately than the calculation formula described above, since it takes into account the sense of rhythm and how the tempo matches.

Next, an example of the score calculation formula in this embodiment will be explained. In this embodiment, score calculation is divided into two stages: calculation of subtotal of scores and calculation of total score.

First, to calculate the subtotal of scores, the following formula is used based on the formula.

Pn=[P _o-1 ×ΣN _o-1 +100×{(N ₂₁ +N ₂₂ +N ₂₃ )−(
α｜N ₁₁ −N ₂₁ |+β｜N ₁₂ −N ₂₂ |+γ｜N ₁₃ −N ₂₃ |)}]/(ΣN _o-1 +N ₂₁ +
N ₂₂ + N ₂₃ )...Formula However, Pn is the subtotal of the points at that point, P _o-1
is the subtotal of scores at the time of previous calculation, and ΣN _o-1 is the sum of the number of scale change detections at the time of calculating P _o-1 ΣN _o-1 = 〓 ^n=1n-1 (N ₂₁ +N ₂₂ +N ₂₃ ) It shows. As can be seen by comparing the above formula with the above formula, Pn = [P _o-1 × ΣN _o-1 + (P in the formula) × (N ₂₁ + N ₂₂ + N ₂₃ )} / (ΣN _o-1 + N ₂₁ +N ₂₂ +N ₂₃ )
...It is in the form of a formula, and is the subtotal of the scores at the time of the previous calculation.
P _o-1 and the subtotal of scores from the previous calculation to the present, that is, what corresponds to P in the formula, are weighted according to the number of scale change detections,
This is a recalculation of the subtotal of scores. To give an example of calculation, the subtotal of scores at the time of previous calculation P _o-1
is 80 (points), the number of scale changes detected so far ΣN _o-1 (times), the subtotal of scores from the previous calculation to the present, that is, the score corresponding to P in the formula is 60 (points),
If N ₂₁ + N ₂₂ + N ₂₃ = 100 (times), the subtotal Pn of the current score is Pn (80×400+60×
100)/(400+100)=76 (points).

As described above, each time a pause in the vocal signal is detected by the second pause detection means, a subtotal of scores is calculated in step 41, and a total score is calculated in step 39.

In this example, the total score P _T is calculated based on the same concept as the previous formula, with K _a and K _b being constants, P _T = K _a × P _o + K _b × N ₄ /N ₃ . Define.

The first term in the above equation, like the first term in the above equation, represents how much the change in the scale of the audio signal sung by the user matches the change in the scale of the vocal signal on the magnetic tape 1, and the first term in the equation The second term, like the second term in the above equation, represents the sense of rhythm and the degree of tempo matching.

In the above formula, constants K _a and K _b can be set so that 100 points are the perfect score. Since the calculation formula is such that the scores are accumulated,
Compared to the above formula or the calculation formula of the formula, more accurate score calculation can be performed. To give an example, if there is a short song consisting of only two phrases with only one press in the middle, the data on the sound change of only the first phrase is N ₁₁ = 100, N ₁₂ = 150, N ₁₃ = 250, _N21
= 250, N ₂₂ = 150, N ₂₃ = 100, the scale change data for only the second phrase is N ₁₁ = 200, N ₁₂ = 100, N ₁₃
Consider the case where N ₂₁ = 50, N ₂₂ = 100, and N ₂₃ = 200.

When calculating with α = β = γ = 1 in the formula, for the first phrase only, P ₁ = 100 × {(250 + 150 + 100) − ( | 100 − 250 |
+｜150−150｜ +｜250−100｜)｝／(250+150+100)=40
(point) becomes.

Next, for only the second phrase in the formula, P ₂ = 100 × {(50 + 100 + 200) − ( | 200 − 50 | +
|1000−100| +|50−200|)}/(50+100+200)≒14(
point).

Next, the first phrase and the second phrase are combined to calculate a score.

The score according to the formula is P=100×[{(250+50)+(150+100)+(100
+200)}-{|(100+200) -(250+50)|+|(150+100)-(150+100)
|+|(250+50) −(100+200)|}/{(250+50)+(150+100
) + (100 + 200)} = 100 (points), and even though the score for each phrase is low for the first and second phrases, when calculated as a whole, it can become a perfect score of 100.

On the other hand, in the calculation formula of this example, if the score is calculated by setting K _a = 1 and K _b = 0 for simplicity, the score for each phrase of the first phrase and the second phrase in the above formula can be used. , all you have to do is calculate the formula, so the score P in that case is
is, P={40×(250+150+100)+14×(5
0+100+200)} /(250+150+100+50+100+200)≒2
The result is 9 (points), and it can be seen that the unreasonableness of formulas and expressions is eliminated. And when K _b ≠ 0, the sense of rhythm,
More accurate score calculations will take into account the tempo match.

In this way, in steps 39 and 41, information on changes in the scale of the user's audio signal, information on changes in the scale of the vocal signal on the magnetic tape 1, and information indicating how the rhythm and tempo of the user's audio signal match are used. , it can be seen that the score is calculated based on the extent to which the user's voice signal and the vocal signal on the magnetic tape 1 match. After calculating the score, the score is displayed on a score display means (not shown) in step 40.

As described above, according to this embodiment, changes in the scale of an audio signal sung by a user are compared with changes in the scale of a vocal signal such as a magnetic tape, and the sense of rhythm and tempo are determined based on the vocal signal. Since the degree of matching can be calculated and displayed as a score each time a pause in the vocal signal is detected, it is possible to provide an objective evaluation means for the user's singing ability.

In this example, the user's singing voice signal was used as the scoring target, and the vocal signal recorded on magnetic tape, which is an audio multiplexing recording medium, was used as the scoring standard. Any audio signal such as a wave signal or a person's voice may be used.

Furthermore, in this embodiment, a waveform conversion means using a low-pass active filter and a transistor was used to convert an audio signal into a pulse signal.
This may use a circuit in which an analog-to-digital converter directly converts the audio signal waveform into a digital value pulse signal.

Further, in this embodiment, the scale change detection means, count storage means, etc. are realized by a microcomputer, but it goes without saying that these may be realized and used by conventional general-purpose logic circuits.

In addition, in this embodiment, a waveform conversion means and a scale change detection means are provided separately for processing the user's audio signal and vocal signal processing, but these are only one system, and the user's audio signal is processed in a time-sharing manner. , and vocal signal processing may be performed.

In addition, in this embodiment, the time width in the case of "H" of the pulse signal which is the output of the _waveform converting means _is shown in _{FIG .} It detects everything such as width, changes in the higher direction of the audio signal scale, changes in the lower direction, and 3 that remain unchanged.
We are trying to detect changes in species, for example,
In Figure 6c, the time span from t ₁ to t ₂ is followed by t ₅ .
Changes in the time width may be detected one at a time, such as the time width of _t6 , or the change in time width may be sufficiently long compared to one time width when the pulse signal that is the output of the waveform converting means becomes "H". The time width at which the pulse signal that is the output of the waveform conversion means becomes "H" for a certain period of time is investigated for all pulses or for a part of the pulses, and the average time width and maximum time width for each pulse are determined. , changes in the scale of the audio signal may be detected based on changes in the average time width, etc., or changes in the higher direction, lower direction, etc.
Of the three types of unchanging changes, only one or two types of changes may be detected.

Effects of the Invention As described above, the present invention includes two waveform conversion means for converting two audio signals into pulse signals, and detects how the scales of the two audio signals change based on the outputs thereof. two scale change detection means,
two counting storage means for counting and storing the output;
The two types of information stored in the two counting storage means, the number of times a transition to a higher scale is detected, the number of times a transition to a lower scale is detected, and the number of times a change is detected, serve as the criteria for scoring. Comparison calculations are performed each time a pause in the audio signal is detected, and the sense of rhythm and tempo are also checked to more accurately determine the degree of matching between the two audio signals. Each time you play, you can earn points up to that point.

This means that people who practice singing using audio multiplexed recording media can use the vocal signals recorded on the audio multiplexed recording media as a singing teacher to evaluate the singing ability of the singing teacher. This means that it is possible to provide an objective means of determining how many points a person has in terms of singing ability. In other words, for those who practice singing, the goal of practicing becomes clearer, and the motivation to practice increases, such as saying, ``I'm going to sing this song and practice until I get a score of 80 or higher,'' and it becomes easier to try singing. If you don't get a good score, think about why you don't get a good score.Also, every time a pause in the audio signal is detected, which is the basis for scoring, the score up to that point will be displayed.
By looking at the changes in your score and looking for weaknesses in your own singing style, you can further improve your singing ability, and the results will be great.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram of an audio multiplex track on a magnetic tape, which is one type of audio multiplex recording medium, and Figure 2 is an illustration of a so-called audio multiplex track using magnetic tape, which is one type of audio multiplex recording medium. 3 is a block diagram of a main part of an embodiment of the present invention, FIG. 4 is a block diagram showing a specific configuration of this embodiment, and FIG. 5 is a block diagram of a karaoke device of this embodiment. FIG. 6 is an operation explanatory diagram for explaining the operation of the first waveform conversion means;
FIG. 7 is a flowchart showing the main part of the processing operation of the microcomputer of this embodiment. 7...First waveform conversion means, 8...Second waveform conversion means, 9...First scale change detection means, 10
...Second scale change detection means, 11...First count storage means, 12...Second count storage means, 13
...first pause detection means, 14...second pause detection means, 15...pause simultaneous release detection means, 41...
...Third count storage means, 16...Fourth count storage means, 17...Score calculation means.

Claims (1)

[Claims] 1. A first waveform converting means that converts an input first audio signal into a pulse signal, and based on the output pulse signal of the first waveform converting means, the scale of the first audio signal is high. a first scale change detection means for detecting whether the musical scale has shifted to a lower scale, or whether there is no change; and a second waveform converting means that converts an inputted second audio signal into a pulse signal. , a second device for detecting whether the scale of the second audio signal has shifted to a higher scale, shifted to a lower scale, or remains unchanged based on the output pulse signal of the second waveform converting means; Based on the outputs of the scale change detection means and the first scale change detection means, the number of times a shift to a higher scale was detected, the number of times a shift to a lower scale was detected, and the number of times no change was detected. The first step is to count and memorize each
and the number of times a transition to a higher scale was detected, the number of times a transition to a lower scale was detected, and the number of times no change was detected based on the output of the second scale change detection means. a second count storage means for counting and memorizing, a first pause detection means for detecting a no-signal portion of the first audio signal, and a second count storage means for detecting a no-signal portion of the second audio signal. a pause detection means, a third counting storage means for counting and storing the number of times a pause is detected by the second pause detection means, and a second count storage means based on the output of the second pause detection means. At the time when it is detected that the pause of the audio signal is canceled, it is detected whether the pause of the first audio signal is also canceled almost simultaneously by checking the output information of the first pause detection means. a detection means; and a fourth counting storage means for counting and storing the number of times that the pause of the first audio signal is almost simultaneously released from the pause of the second audio signal based on the output of the pause simultaneous release detection means. , three pieces of information stored in the first count storage means, the number of times a shift to a higher scale was detected, the number of times a shift to a lower scale was detected, and the number of times no change was detected, and the second The second pause detection means stores three pieces of information stored in the count storage means, including the number of times a shift to a higher scale was detected, the number of times a shift to a lower scale was detected, and the number of times no change was detected. A comparison operation is performed each time a pause is detected, and further, the number of times a pause is detected by the second pause detection means stored by the third count storage means and the number of times a pause is detected by the fourth count storage means is calculated. the second audio signal according to the ratio of the number of times that the pause of the first audio signal was canceled at almost the same time as the pause cancellation of the second audio signal.
score calculation means for calculating a score based on how much the first audio signal matches the second audio signal each time a pause is detected by the pause detection means; and a score for displaying the calculated score. A scoring device comprising: a display means.