JPH10143179A - Audio signal processing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To correctly evaluate the points by extracting the singing components from audio signals. SOLUTION: Stereophonic audio signals from input terminals 1 and 2 are supplied to vocal canceling circuit 6, the singing components located at a center are canceled by taking difference components, for example, and only accompaniment components are taken out. If the audio signals from the terminals l and 2 are so-called multiplex audio signals, these signals are selected by the contact points 'd' and 'e' of a switch 12 in accordance with the needs and taken out from output terminals 4 and 5. At the same time, the audio signals from the terminals 1 and 2 are supplied to the circuit 6, the accompaniment components of the audio signals are canceled and only the singing components are taken out. Then, the singing components are supplied to a microcomputer 8, which evalutates the singing, through a contact point 'g' of a switch 7. Moreover, the inputted audio signals from a microcomputer 9 are supplied to the microcomputer 8 and the singing of the inputted audio signals is evaluated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called karaoke apparatus, and more particularly to an audio signal processing apparatus suitable for use in scoring singing.

[0002]

2. Description of the Related Art In a so-called karaoke apparatus, for example, an apparatus for scoring singing is implemented. That is, in such a device, the singing is scored by performing the singing along with the karaoke accompaniment. However, in a conventional device of this type, for example, for a karaoke accompaniment or an arbitrary design fixed value, a change in the volume of a microphone input is determined and scored, and the singing itself is not necessarily scored. Was not what it was.

On the other hand, in a sound source apparatus having a plurality of channels, a singing model is recorded in one of the channels, and for example, when the lyrics or melody are forgotten, the channel is reproduced to assist singing. In addition, audio multiplexing devices that allow a single person to perform a duet or the like have been implemented. That is, in this device, a model song is recorded in the sound source device, and the song can be extracted as needed.

[0004] Therefore, in such a voice multiplexing apparatus, it has been considered to perform the above-mentioned scoring on the basis of this model singing. According to this, the discrimination is performed using the model singing, so that more accurate scoring can be performed than in the case of conventional karaoke accompaniment or an arbitrary fixed design value.

However, in the above-described audio multiplexing apparatus,
There is no problem if the recording of the exemplar singing is done by itself. However, in many cases, the recording of a singing model is performed with accompaniment in consideration of being played independently, and in this case, the singing may not be able to be accurately distinguished by the accompaniment component. Was.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and the problem to be solved is that the singing component of the audio signal supplied from the sound source device and the microphone input are used. In a conventional audio signal processing device that performs processing by comparing the singing with the accompaniment, if the recording of the model singing is performed together with the accompaniment, there is a possibility that the singing cannot be accurately determined by the accompaniment. It was.

[0007]

According to the present invention, there is provided an audio signal processing apparatus for performing processing by comparing a singing component of an audio signal supplied from a sound source device with a microphone input. Is extracted from the mixed voice signal, and only the singing component is taken out for comparison. According to this, the singing can always be determined accurately and the scoring can be performed accurately.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relates to an audio signal processing apparatus for performing processing by comparing a singing component of an audio signal supplied from a sound source device and a microphone input, wherein a singing component and an accompaniment component are output from the sound source device. Means for extracting only a singing component from the first and second audio signals when a mixed first audio signal and a second audio signal comprising only an accompaniment component are provided; The comparison with the microphone input is performed using the components.

By the way, a singing component is removed from a stereo two-channel audio signal and is used as a so-called karaoke accompaniment. That is, the singing component is located at the center of the stereo two-channel audio signal, and is often equally included in the two left and right channels. On the other hand, the accompaniment component has a wide spread to the left and right, and different signals are recorded in the left and right two channels.

Therefore, the singing component located at the center can be canceled by taking, for example, a difference component of such a stereo two-channel audio signal, and only the accompaniment component can be extracted and used as a karaoke accompaniment. The present invention focuses on this point. Hereinafter, the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration of an example of an audio signal processing device to which the present invention is applied.

In FIG. 1, two-channel audio signals from an arbitrary sound source device (not shown) are supplied to first and second input terminals 1 and 2, respectively. Normally, two-channel audio signals from these input terminals 1 and 2 are transmitted to the contacts a ₁ and a _{2 of the} changeover switch 3 respectively.
Through to the first and second output terminals 4 and 5.

Further, for example, when the two-channel audio signals from the input terminals 1 and 2 are stereo, these audio signals are supplied to the vocal cancel circuit 6 and, for example, by taking a difference component, are located at the center. The singing component is canceled and only the accompaniment component is extracted. Then, the accompaniment components are connected to the contacts b ₁ and b of the changeover switch 3 described above.
_It is taken out to output terminals 4 and 5 through ₂ . Therefore, the audio signal in which such a singing component is canceled can be used as a so-called karaoke accompaniment.

When singing is scored in this state, for example, one of the audio signals from the input terminals 1 and 2 is supplied to the microcomputer 8 which scores the singing through the contact f of the changeover switch 7. On the other hand, an input voice signal such as a singing of the user from the microphone 9 is supplied to the microcomputer 8 and, for example, a change in the volume of the input voice signal from the microphone 9 with respect to the voice signal from the input terminals 1 and 2 as in the related art Etc. can be discriminated for scoring.

The result of the scoring is supplied from the microcomputer 8 to the display 10, and the scoring is displayed by, for example, a numerical value out of 100. In the above-described apparatus, an operation signal from the operation unit 11 is supplied to the microcomputer 8 to control various operations such as resetting of a score, which will be described later.

On the other hand, when the audio signal from the sound source device (not shown) is a so-called audio multiplex, first, in the first example, for example, a singing component and an accompaniment component are mixed in the input terminal 1. An audio signal is supplied, and an audio signal of only an accompaniment component is supplied to the input terminal 2. And in this case,
Audio signal from the input terminal 1 and 2 contact d of the switch 12 as required, is selected in e, it is adapted to be taken out to the output terminals 4 and 5 via contact c _1, c ₂ of the changeover switch 3 .

Further, in the first example, it is considered that the accompaniment component included in the audio signal from the input terminal 1 and the accompaniment component of the audio signal from the input terminal 2 are completely equal.
Therefore, these audio signals are supplied to the above-mentioned vocal cancel circuit 6, and the difference component of these signals is taken, so that the accompaniment component of the audio signal from the input terminal 1 is output to the output side of the vocal cancel circuit 6. It is canceled and only the singing component is extracted.

When singing is scored in this state, the singing component from the vocal cancel circuit 6 is:
The signal is supplied to a microcomputer 8 that scores the above-mentioned singing through a contact point g of the changeover switch 7. Thereby, the microcomputer 8 compares the input voice signal from the microphone 9 with the singing component from the vocal cancel circuit 6 and scores the singing of the input voice signal from the microphone 9.

That is, in this case, the microcomputer 8 A / D converts the singing component from the contact point g of the changeover switch 7 and detects the level one by one as shown in FIG. Thus, a determination range having a predetermined vertical width is determined. On the other hand, the input audio signal from the microphone 9 is also AD-converted to detect the level one by one.
The singing of the input voice signal can be scored based on whether or not this level is within the above-described determination range.

Alternatively, for example, as shown in FIG.
The frequency is detected from the respective zero-cross points of the singing component from the contact g of the changeover switch 7 and the input audio signal from the microphone 9, and both frequency transitions are compared at the same timing to score the singing of the input audio signal. Do. The scoring is performed, for example, by adding points when the singing of the input voice signal is within a predetermined range, and deducting points when the singing of the input voice signal is outside the range.

In this manner, the singing of the input voice signal from the microphone 9 is scored. In this case, for example, the mixed signal of the singing component and the accompaniment component from the input terminals 1 and 2 and the audio multiplex signal of only the accompaniment component are supplied to the vocal cancel circuit 6, where the accompaniment component of the mixed signal is canceled and the singing component is cancelled. By extracting only the singing, the microcomputer 8 can always accurately determine the singing, and can also accurately score.

Further, in the above-described apparatus, as a second example in which the audio signal from the sound source device is so-called audio multiplexing, for example, when an audio signal of only a singing component is supplied to the input terminal 1, The components are supplied to the microcomputer 8 that scores the singing through the contact h of the changeover switch 7. Therefore, also in this case, the microcomputer 8 can always accurately determine the singing, and can also accurately score.

FIG. 3 shows the structure of the operation unit 12 of the above-described apparatus. In FIG. 3, a function selection switch 21 corresponding to the changeover switch 3 described above is provided on the operation unit 12.
And a changeover switch 22 corresponding to the changeover switch 12 and a scoring switch 23 for resetting the scoring. By the operation of the operation unit 12, the above-described switches 3, 7, 12 and the like are switched, and the start (reset) of the scoring function is controlled.

That is, for example, when a stereo signal is supplied to the input terminals 1 and 2 and OFF is selected by the function selection switch 21, the above-mentioned switch 3 is switched to the contacts a ₁ and a ₂ . As a result, the stereo audio signals supplied to the input terminals 1 and 2 are directly extracted from the output terminals 4 and 5. At this time, the changeover of the changeover switches 7 and 12 is invalid, and the microcomputer 8 does not perform scoring.

On the other hand, when a stereo signal is supplied to the input terminals 1 and 2 and the vocal cancel function is selected by the function selection switch 21, the above-mentioned switch 3 is connected to the contacts b ₁ and b ₂ . The switch 7 is switched to the contact f. Thus, the canceled accompaniment of the singing component is taken out from the output terminals 4 and 5, and the microcomputer 8 performs the same scoring as in the related art.

Further, when an audio multiplex signal is supplied to the input terminals 1 and 2 and the audio multiplex function is selected by the function selection switch 21, the switch 3 is set to the contact c.
_1, is switched to c _2. For example, when the changeover switch 12 is switched to the contact point d or e, the output terminals 4 and 5 output, for example, a mixed signal of singing and accompaniment components from the input terminal 1 or an audio signal of only the singing component, and an input terminal. The audio signal of only the accompaniment component from No. 2 is switched and extracted.

At the same time, when the above-mentioned mixed signal of the singing and accompaniment components is supplied to the input terminal 1, the changeover switch 22 is switched to singing + accompaniment. In this case, when the changeover switch 7 is switched to the contact point g, the microcomputer 8 is supplied with a signal of only the singing component from which the accompaniment component has been canceled from the vocal canceling circuit 6 and scoring is performed. Things.

On the other hand, when an audio signal of only a singing component is supplied to the input terminal 1, the changeover switch 22 is switched to only singing. In this case, when the changeover switch 7 is switched to the contact point h, a signal of only the singing component from the input terminal 1 is supplied to the microcomputer 8 to perform scoring.

In this way, the operation signals of the function selection switch 21 and the changeover switch 22 of the operation section 12 are supplied to the microcomputer 8, so that the above-mentioned changeover switches 3, 7, and 12 are switched. . By operating the scoring switch 23, for example, the total value of the scoring in the microcomputer 8 is reset, and the start (reset) of the scoring function is controlled.

Therefore, according to the present invention described above, in an audio signal processing apparatus for performing processing by comparing a singing component of an audio signal supplied from a sound source apparatus with a microphone input,
By extracting only the singing component from the audio signal in which the singing component and the accompaniment component are mixed and comparing the singing component, the singing can always be accurately determined, and the scoring can be performed accurately.

Thus, in the conventional apparatus, when the recording of a model singing is performed together with the accompaniment, there is a possibility that the accompaniment may make it impossible to accurately determine the singing. According to the method, by extracting only the singing component and comparing the singing components, the singing can always be accurately determined, and the scoring can be performed accurately.

According to the above-described audio signal processing device, in the audio signal processing device for performing processing by comparing the singing component of the audio signal supplied from the sound source device with the microphone input, the singing component and the accompaniment component are output from the sound source device. Means for extracting only a singing component from the first and second audio signals when a first audio signal mixed with the first audio signal and a second audio signal including only an accompaniment component are provided. By comparing the singing component with the microphone input using the singing component, the singing can always be discriminated accurately, and the scoring can be performed accurately.

[0032]

According to the present invention, in a voice signal processing device for performing processing by comparing a singing component of a voice signal supplied from a sound source device with a microphone input, a voice in which a singing component and an accompaniment component are mixed. By extracting only the singing component from the signal and comparing the singing components, the singing can always be determined accurately, and the scoring can be performed accurately.

Thus, in the conventional apparatus, when the recording of a model singing is performed together with the accompaniment, there is a possibility that the accompaniment may make it impossible to accurately determine the singing. According to the method, by extracting only the singing component and comparing the singing components, the singing can always be accurately determined, and the scoring can be performed accurately.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an example of an audio signal processing device to which the present invention is applied.

FIG. 2 is a diagram for explaining the operation.

FIG. 3 is a diagram for explaining this.

[Explanation of symbols]

1, 2 first and second input terminals, 3 switch, 4, 5 first and second output terminals, 6 vocal cancel circuit, 7 switch, 8 microcomputer for singing, 9 microphone, 1 microphone
0 Scoring result display, 11 operation unit, 12 changeover switch

Claims (3)

[Claims] 1. An audio signal processing device for performing processing by comparing a singing component of an audio signal supplied from a sound source device with a microphone input, wherein a first singing component and an accompaniment component mixed from the sound source device are mixed. Means for extracting only the singing component from the first and second audio signals when the second audio signal consisting of only the accompaniment component is supplied, An audio signal processing device for performing comparison with the microphone input using the same. 2. The audio signal processing device according to claim 1, further comprising a vocal cancel circuit for removing a singing component located at the center from the stereo two-channel audio signal, wherein the vocal cancel circuit includes the first and second vocal cancel circuits. An audio signal processing apparatus characterized in that the audio signal is supplied to extract only the singing component. 3. The sound signal processing device according to claim 1, wherein when a sound signal consisting of only the singing component is supplied from the sound source device, a comparison with the microphone input is performed using the singing component of the sound signal. An audio signal processing device characterized by comprising means for performing: