JPH09214266A - Volume automatic adjustment device for karaoke swing along machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a volume automatic adjustment device for karaoke swing along machine to always adjust an output volume from a speaker to an optimum value regardless of a sound volume of a singer. SOLUTION: A CPU 8 compares a reference microphone sound volume received by a microphone sound volume input means 10 with a sound volume level of a sound signal received from an A/D converter 6 to control a gain of a microphone 2 so that the input sound volume level is coincident with the reference microphone sound volume. Furthermore, a sound signal and an output gain of a music signal of a sound volume adjustment circuit 3 are selected so that a ratio of the sound volume level of the sound signal from the microphone amplifier to the sound volume level of the music signal from the A/D converter 7 is coincident with a sound volume mixing ratio set by a mixing ratio input means 9. The sound volume adjustment circuit 3 conducts synthesis control according to the output gain of the vocal sound signal and the music signal sent by the CPU 8 and provides an output to a speaker 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a karaoke apparatus, and more particularly to automation of output volume adjustment thereof.

[0002]

2. Description of the Related Art A karaoke device is a device for singing a song along with a karaoke piece.

FIG. 6 shows a conventional volume adjusting device for a karaoke machine. The vocal sound is input to the microphone amplifier 2 through the microphone 12. The audio signal output from the microphone amplifier 2 is added to the music signal by the adder 13. The output of the adder 13 is output to the speaker 5 via the output amplifier 4. Microphone volume setting means 14
Is for setting the microphone volume by adjusting the gain of the microphone amplifier 2. The output volume setting means 15 is for adjusting the output volume of the signal after adding the microphone voice and the karaoke piece. For example, when the singer selects a karaoke song and wants to sing it, it is necessary to judge whether the output volume from the speaker is appropriate or not. Alternatively, the singer himself adjusts the microphone volume by operating the microphone volume setting means 14 and the output volume setting means 15 manually or while adjusting the volume with a remote controller.

[0004]

However, in the case of reproducing karaoke songs by a plurality of persons and in no particular order, in the conventional output volume adjusting device of the karaoke device, two volume settings are set in accordance with the vocal volume of the singer. It is necessary to operate the means to change the output volume, and when changing it, even if the microphone volume is optimized, the balance with the song will be bad, the output volume will be changed again, and the microphone volume will be adjusted again. It had to be troublesome.

Further, since there are individual differences in the use styles of the microphones, the singers have to adjust the output volume while singing a few songs and singing a few phrases, which causes a mess of karaoke. was there. Also, regarding the listener, if the singer is too close to the microphone and it is difficult to hear, or if the singer is too far from the microphone and it is difficult to hear it, the singer has to adjust the output volume in front of his eyes and bother each other. There was also the problem of being lost.

It should be noted that, in Japanese Patent Laid-Open No. 5-19777, even if the singer manually adjusts the volume such as a micro volume during the reproduction of a song, the microphone is set at the end of the song or the beginning of the next song. A karaoke device is disclosed in which the volume and the like are automatically returned to a standard level stored in advance, and the gain is attenuated by a predetermined amount each time the microphone output exceeds a preset level during music reproduction. .

However, in this karaoke apparatus, since the volume level is returned to the standard level for each song, a singer who does not conform to the standard level needs to manually adjust the volume level each time he sings. Also, although technology has been shown that automatically reduces the volume level when the microphone output exceeds a preset level while playing a song, it automatically deals with the case where the microphone output is too low, and No consideration is given to the balance with the volume of karaoke songs. Therefore,
If the microphone output is too low, it is necessary to manually adjust the microphone volume, and in order to properly set the balance between the microphone volume and the karaoke song volume, it is necessary to set both volumes again and again. It seems that there is a similar problem to.

Further, for example, in a karaoke device in which optical disks and communication karaoke are mixed or in a karaoke device of a centralized management system, the output volume setting level of karaoke music is different for each production maker, and therefore the microphone volume is considered to be the optimum value. However, there is a problem in that the output volume is not always optimal in terms of the volume balance between the karaoke music volume and the microphone volume, and the output volume must be newly set.

The present invention solves the above problem and automatically adjusts the volume of a karaoke device to an optimum output volume regardless of the vocalization volume of the singer each time a karaoke piece is played. The purpose is to provide a device.

Another object of the present invention is to provide an automatic volume adjusting device for a karaoke device, which can automatically adjust to an optimum output volume in terms of volume balance between the microphone volume and the karaoke music volume. .

[0011]

A volume automatic adjusting device for a karaoke device according to the present invention includes a microphone for inputting vocal sound, a microphone amplifier for adjusting the gain of a vocal sound signal input from the microphone, and Volume mixing ratio input means for setting the balance of the output volume of the vocal sound signal and the music signal,
According to the volume mixture ratio set by the volume mixture ratio input means, the output gain setting means for setting the output gain of the vocal sound and the music signal, and the output gain set by the output gain setting means are obtained from the microphone amplifier. And a volume control circuit for controlling the synthesis of the vocal sound signal and the music signal.

The apparatus according to the present invention further comprises a microphone reference volume setting means for setting a reference volume level of a vocal voice signal, and a volume level of a vocal voice signal input from a microphone, and comparing the volume level with the reference volume level. Microphone amplifier gain setting means for setting the gain of the microphone amplifier so that the vocal sound signal matches the reference volume level.

The output gain setting means calculates the output volume level value of the music signal from the volume level of the audio signal output from the microphone amplifier based on the volume mixture ratio set by the volume mixture ratio input means, and the volume level. The gain constant of the music signal in the adjusting circuit is set.

The "volume mixture ratio" can be entered as a numerical value, but it is not always necessary to enter it as a numerical value. For example, a plurality of options relating to the volume of the vocal sound with respect to the music volume can be selected with a selection switch or the like. It may be presented so that the user can select one of them. Alternatively, the volume mixture ratio may be set in advance for each genre and the user may be allowed to select one of the genres.

The output gain setting means and the microphone amplifier gain setting means can be realized by program control using a central processing unit (CPU). In that case, the analog audio signal and the analog music signal can be digitized and processed by the A / D converter.

The music signal can be reproduced from a recording medium or obtained by communication.

According to the present invention, by setting the mixing ratio of the music signal and the audio signal in advance, the output volume balance for the vocal sound and the karaoke music becomes constant. There is no need for complicated operations that require repeated settings.

Further, by adjusting the volume level value of the input vocal audio signal so as to match the standard reference microphone volume level value n, the output level of the singer can be changed regardless of the vocalization volume of the singer and the usage style of the microphone. The vocal volume can be adjusted to a constant level.

[0019]

FIG. 1 is a basic block diagram of a volume automatic adjusting device for a karaoke apparatus according to an embodiment of the present invention.

In the figure, 1 is the main body of the karaoke apparatus, 2 is a microphone amplifier capable of adjusting the gain of a vocal audio signal according to a set gain value, 3 is a volume control circuit capable of adjusting the mixing degree of the audio signal and the music signal and the output gain. Is a speaker, 6 is an A / D converter for converting a vocal sound into a digital sound signal, 7 is an A / D converter for converting a music signal into a digital music signal, and 8 is for controlling the operation of the karaoke apparatus main body 1. A central processing unit (CPU), 9 is a mixing ratio input means for initially setting a volume mixing ratio of vocal voice and karaoke music, 10 is a microphone volume input means for setting a reference microphone volume level value of a microphone amplifier, and 11 is a control of the CPU 8. A read-only memory (ROM) that stores a program that defines the contents and various data, 12 is a micro that inputs vocal sound. Is O emissions.

First, the general operation of the entire karaoke apparatus will be described.

The vocal sound input through the microphone 12 is input to the microphone amplifier 2. The audio signal output from the microphone amplifier is input to the A / D converter 6 and the volume control circuit 3. In the A / D converter 6, the audio signal is converted into a digital signal and output to the CPU 8. The music signal is input to the volume control circuit 3 and the A / D converter 7. The mixing ratio input means 9 sets the mixing degree of the vocal sound signal and the music signal, and outputs the volume mixing ratio to the CPU 8. In the microphone volume input means 10, the microphone volume value corresponding to the input value is selected from the ROM 11 and the CP
It is converted to a corresponding gain value through U8 and set in the microphone amplifier 2. The CPU 8 regards the period in which the music signal is input from the A / D converter 7 as a music reproduction period, recognizes the volume level value of the audio signal input from the A / D converter 6 during that period, and recognizes this volume. Depending on the difference between the level value and the preset reference volume level, the microphone amplifier 2
Set the gain of. Furthermore, the output gain value of the volume adjusting circuit 3 is set according to the volume mixing ratio preset by the mixing ratio input means 9. This volume control circuit 3 is CP
According to the output gain value set by U8, the mixing degree of the vocal sound signal and the music signal and the output gain are adjusted and output to the speaker 5.

By such an operation of the karaoke apparatus, the vocal volume of the output can be adjusted to be constant regardless of the vocalization volume of the singer and the style of use of the microphone. Further, by setting the mixing degree of the music and the vocal sound in advance, the balance of the output volume for the vocal sound and the music becomes constant. Therefore, while adjusting the two means of the microphone volume setting and the output volume setting as in the conventional method, There is no need to set the frequency repeatedly. Further, in a karaoke device in which optical discs and online karaoke are mixed, or in a karaoke device of a centralized management system, the output volume balance can be optimally maintained even if the volume setting level of the karaoke piece is different for each production maker.

Next, the specific operation of each part of the karaoke apparatus will be described.

First, referring to FIG. 2, a concrete process for inputting the reference sound volume level value n of the microphone 12 by the microphone sound volume input means 10, that is, according to a manual operation of the singer, a key input or a level of a knob or the like is inputted. 9 shows a flowchart of a process for inputting with.

In FIG. 2, it is first selected whether the setting input is made by key input or a knob (S2).
1). When setting and inputting with a knob or the like, the input level value (n0) is received (S27), and this is set as the reference volume value n (n = n0) (S28). If you select key input,
For example, any one may be selected from the display of "maximum / large / normal / small" (S22). The volume value corresponding to the selected display is selected from the ROM 11 (“n1, n2
.N3.n4 "), and the volume level value n is treated as input (S23 to S26). Needless to say, "maximum" is set to a volume level value that does not cause howling. After that, the volume level value n becomes a reference for all gain adjustments. That is, the change amount of the amplifier gain value set when the volume level value of the input signal matches n is 0 [dB].

Next, in the mixing ratio input means 9, the balance of the output volume of the audio signal and the music signal is input by the key input or the level of a knob or the like. For example, when the output level value of the reference audio signal is 1, the setting is performed in proportion to the output level value of the music signal. If you want to push the vocals to the front, you can set the vocals to a larger size (for example, vocal: song = 1: 0.9 or 1: 0.8). If you want to sing with the same feeling as a professional vocal, Slightly suppressed (eg vocal: song = 1: 1
Alternatively, it may be set to 1: 1.1 or the like). Regarding this, by taking advantage of the fact that the balance is slightly different depending on the music genre, for example, a song / enka (vocal: song = 1:
0.8), rock folk (vocals: song = 1:
1) and the genre may be set.

When the volume mixture ratio has been set, the reference output volume level value n of the audio signal is based on the volume mixture ratio.
Thus, the reference volume level value k of the music signal is calculated. This volume level value k becomes the reference volume value of the music signal. CP
At U8, the gain constant c [dB] of the microphone amplifier 2 corresponding to the volume level value n of the microphone and the gain constant b [dB] of the music signal in the volume adjusting circuit 3 corresponding to the volume level value k of the music signal are set. Set.

After the above initial setting, the CPU 8
When the music signal starts to be input from the A / D converter 7, it is determined that the music is reproduced, and the mode is set to the music reproduction period. The operation during the music reproduction will be described below.

As described above, the vocal sound is input to the microphone amplifier 2 through the microphone 12. The sound signal output from the microphone amplifier 2 is output to the volume control circuit 3
And to the A / D converter 6. The audio signal is converted into a digital audio signal in the A / D converter 6, and the CPU 8
Is output to

FIG. 3 shows an input signal (A
7 shows a flowchart for detecting the volume level value of the output of the / D converter 6).

The CPU 8 stores the input data x from the A / D converter 6 for the period w [s] (this period is a chorus period and may be varied every 30 seconds) (S31). Next, when the input level value of the vocal sound is 0 or very small (value y), it is determined that it is before singing or between songs, and only the value whose volume level value x is y or more is valid sound data, and valid sound data value The average value z is calculated from the total of the above and the number of samples thereof (S32). The average value z is set as the volume level value m of the input audio signal (S33). When the detection period w [s] is set too short, detection and control of the output volume are performed at the moment of the song, so that the intonation of the song may be lost. . Therefore, the detection period should be set to a certain period of time. Expression (1-1) shows the relationship between the volume difference D, the volume level value m of the audio signal, and the reference microphone volume level value n.

D = m−n (1) FIG. 4 shows a flowchart for setting the gain value in the microphone amplifier 2. First, the input volume level value m detected in the process of FIG. 3 is received (S41), and this value is compared with the standard microphone volume level value n initially set to detect the volume difference D (S42). Then, the gain constant c [dB] of the microphone amplifier 2 is changed according to the detected sound volume difference D (S43 to S47). That is, in equation (1-1),
If the value of D is a positive value, the gain constant c [dB] is changed from the current value by a value (α) corresponding to D (S45), and if it is a negative value, The value is increased by the amount (α) corresponding to D (S47). When D = 0, the gain constant c [dB] is made equal (invariant) to the previous value (S46).

FIG. 5 shows a flowchart for setting the gain value of the music signal input to the volume control circuit 3. The music signal is converted into a digital music signal in the A / D converter 7 and output to the CPU 8. The CPU 8 detects the volume level value j of the digital music signal in the same manner as the level value detection of the audio signal (S51), and compares the input volume level value j with the initially set reference music volume level value k for a certain period of time. , The volume difference i is detected (S52). In formula (1-2),
The relationship between the volume difference i, the music signal volume level value j, and the reference music volume level value k is shown.

I = j−k (1-2) According to the detected volume difference i and the volume mixture ratio set by the mixture ratio input means 9, the music signal of the volume control circuit 3 described above. The gain constant b [dB] is changed by the same calculation method as the initial setting of the gain constant b [dB] (S53 to S5).
7). That is, in Expression (1-2), when the value of i is a positive value, the gain constant b [dB] is changed to a value obtained by lowering the gain constant b [dB] by the amount (β) corresponding to i ( S5
5) If the value is negative, the value is increased by the amount (β) corresponding to i (S57). When i = 0, the gain constant b [dB] is set to be equal (invariant) to the previous value (S56). It should be noted that, in the case of detecting the level of a music, it is possible to provide several detection points, but since the output volume level of the music changes each time because it may vary greatly depending on the music such as a ballad, it becomes very difficult to sing. There is. Therefore, after the first setting after the initial setting, the range of the fluctuation level should be considered to some extent, and the range should be set as a dead zone, and the output volume level of the music should not be changed unless it exceeds the dead zone. For that purpose, “0” on the right side of the inequalities in steps S53 and S54 of FIG. 5 may be changed to a predetermined positive value.

The vocal sound signal output from the microphone amplifier 2 is supplied to the volume adjusting circuit 3, mixed with the music signal at a preset volume mixing ratio, and reaches the ears of the singer and listener through the speaker 5.

If the input level is extremely low even during the song, it is necessary to provide a limiter for the gain control of the amplifier so that howling does not occur due to the amplifier gain value becoming too large.

As described above, by adjusting the volume level value of the input vocal sound signal so as to match the standard reference microphone volume level value n, the vocal volume of the singer and the usage style of the microphone can be changed. Instead, the vocal volume of the output can be adjusted to be constant. Furthermore, by adjusting the volume level value of the music signal for each music and setting the mixing degree of the music signal and the audio signal in advance, the balance of the output volume with respect to the vocal sound and the karaoke music is always constant. It is not necessary to repeatedly set the settings and the output volume setting while adjusting the two means, and it is possible to easily set the balance so that a professional sings.

It is also possible to deactivate the automatic vocal volume adjustment function in the karaoke apparatus main body so that the singer can arbitrarily set the vocal volume.

[0040]

According to the present invention, the gain of the microphone amplifier is adjusted according to the input volume level value of the vocal voice, and the gain adjustment of the vocal voice and the karaoke piece can be set by the volume mixture ratio. , It is possible to automatically adjust the output volume and the volume balance with the song to the singer's vocalization volume optimally, and eliminate the annoyance of repeatedly adjusting both the microphone volume and the output volume each time the singer changes, as in the past. .

[Brief description of drawings]

FIG. 1 is a configuration diagram of an automatic volume adjusting device for a karaoke device according to the present invention.

FIG. 2 is a flowchart of a microphone volume level value input means according to the embodiment.

FIG. 3 is a flowchart showing detection of an input volume level value according to the embodiment.

FIG. 4 is a flowchart showing gain control of the microphone amplifier according to the embodiment.

FIG. 5 is a flowchart showing gain control of the volume control circuit according to the embodiment.

FIG. 6 is a configuration diagram of a conventional volume adjusting device for a karaoke device.

[Explanation of symbols]

 1 Karaoke apparatus main body 2 Microphone amplifier 3 Volume control circuit (adder and amplifier) 4 Output amplifier 5 Speaker 6,7 A / D converter 8 CPU 9 Mixing ratio input means 10 Microphone volume input means 11 ROM 12 Microphone 13 Adder 14 Microphone volume setting means 15 Output volume setting means

Claims (3)

[Claims] 1. A microphone for inputting a vocal sound, a microphone amplifier for adjusting a gain of a vocal sound signal input from the microphone, and a microphone for setting an output volume balance between the vocal sound signal and the music signal. Volume mixing ratio input means, according to the volume mixing ratio set by the volume mixing ratio input means, at least output gain setting means for setting the output gain of the music signal, according to the output gain set by the output gain setting means,
A volume automatic adjusting device for a karaoke device, comprising a volume adjusting circuit for controlling synthesis of a vocal sound signal obtained from the microphone amplifier and the music signal. 2. A microphone reference volume setting means for setting a reference volume level of a vocal voice signal, and a volume level of a vocal voice signal input from a microphone is compared with the reference volume level, and the vocal voice signal is the reference. 2. The automatic volume adjusting device for a karaoke apparatus according to claim 1, further comprising a microphone amplifier gain setting means for setting the gain of the microphone amplifier so as to match the volume level. 3. The output gain setting means calculates the output volume level value of the music signal from the volume level value of the audio signal output from the microphone amplifier based on the volume mixture ratio set by the volume mixture ratio input means. 3. The automatic volume adjusting device for a karaoke apparatus according to claim 1, wherein the gain constant of the music signal in the volume adjusting circuit is set.