JPS6120993A - Karaoke practicing apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a karaoke practice device having a score display function.

Conventional Structure and Problems Traditionally, karaoke practice devices have used soft tapes (hereinafter referred to as audio multiplex tapes) in which the performance and the singer's vocal signals are recorded on separate tracks. It is known that a microcomputer or the like is used to compare the singer's vocal signal recorded on a multiplexed tape with the practitioner's vocal signal input from a microphone, and the results of this comparison are displayed as a score. It is very useful for practice and for games where you compete with others in singing. In addition, it is possible to add the following duet function to such a karaoke practice device to make it multifunctional, but simply adding it would not provide reliable score display when operated with the duet function. This problem arises.

First, the duet function amplifies and rectifies the user's vocal signal input from the microphone, and uses this rectified signal to mute the singer's vocal signal played from the audio multiplex tape. It is something. Specifically, when using a multiplex audio tape for a duet in which the vocals of a male singer and a female singer are recorded alternately on one channel and the performance is recorded on the other channel, if there is no input from the microphone, A male or female singer vocal signal reproduced from an audio multiplex tape is output as is, and when a user vocal signal (practice vocal signal) is input from the microphone, muting is applied to the output of the singer vocal signal. It is possible to output a user vocal signal by replacing one of the male or female singer vocal signals with the user vocal signal. Next, the fact that the required score display cannot be obtained by simply adding such a duet function will be explained using a specific example shown in FIG.

The playback head (8) is a duet audio multiplex tape (7)
The playback head (9) plays back the vocal signal. These two image raw signals are each sent to an amplifier (10
) (11), then the mixing amplifier (
13), amplified by a power amplifier (14), and output from a speaker (15).

On the other hand, a user vocal signal input from a microphone (1) is amplified from a terminal (2) by amplifiers (3) and (4), mixed at the input of a power amplifier (14), and output from a speaker (15). If you want to hear only the singer's vocal signal or performance signal on the duet audio multiplex tape (7), use the balance volume (12).
When performing a duet as described above, by setting the balance volume (12) to the center position, both the singer's vocal signal and the performance signal are output.

A portion of the user vocal signal output from the amplifier (3) is transmitted through a muting circuit (17-3) consisting of an amplifier (17-1), a rectifier (17-2), and a transistor (17-3).
17) and muting is applied to the singer's vocal signal generated at the output of the amplifier (11) when the user's vocal signal is input from the microphone (1). The muting circuit g (17) operates only when the duet function is used because a voltage of 10 B is applied through the switch (18) when the duet function is used.

A portion of the user vocal signal output from the amplifier (3) is supplied to the first waveform converting means (A) of the score display device (5). The second waveform conversion means (B) of the score display device (5) is supplied with the singer's baud and cal signals from the output side of the amplifier (11). The comparator (C) of the score display device (5) compares the output signals of the first and second waveform conversion means (A) and (B), and the comparison result is displayed on the score display means. If you do not want the score display device (5) to operate, use the comparison calculator (C).
Reset switch (6) connected to the reset terminal of
If you turn on the score, the score will no longer be displayed. Now, with the switch (6) in the off (open) state and the score display device (5) operating, turn on the switch (18) and use the τ duet function. As described above, each time the user inputs a vocal signal from the microphone (1), the singer's vocal signal is muted, and the singer's vocal can be heard only when the user is not singing. In the score display device (5) in such a state, although the signal is supplied to the first waveform converting means (A) when the user vocal signal is input, at this time the muting circuit (1
Since 7) mutes the singer's vocal signal, the vocal signal is not input to the second waveform converting means (B), and the comparison cannot be made properly. Also, when no user vocal signal is input, the vocal signal is input to the second waveform converting means (B), but there is no vocal signal to the first waveform converting means (A, ), so comparison is not possible. If this is not done properly, the score display means (D) will only display random scores when using the duet function.

OBJECTS OF THE INVENTION An object of the present invention is to provide a karaoke practice device that can display accurate scores even when the duet function is selected.

Structure of the Invention The karaoke practice device of the present invention compares a practitioner vocal signal input from a microphone with a singer vocal signal reproduced from a recording medium using a score display device, and displays the evaluation result of the practitioner vocal signal as a score. and when a duet function is selected, a muting circuit that detects the practice person's vocal signal outputs the practice person's vocal signal in place of the singer's vocal signal during the period of detecting the practice person's vocal signal, and displays the score. The singer's vocal signal to the device is configured to be muted during a period when the muting circuit is not detecting the practitioner's vocal signal, so that accurate score display can be obtained even when the duet function is selected. shall be.

Description of examples Hereinafter, one embodiment of the present invention will be described based on FIG. 2.

It should be noted that those having the same function as those shown in FIG.

FIG. 2 shows a karaoke practice device according to the present invention, which differs from FIG. 1 in the following points. In other words, in FIG. 2, the point at which the singer's vocal signal is extracted from the second waveform converting means (B)l\ of the score display device (5) is different;
Muting transistors (20) and (21) are added to the signal supply line to the waveform modification means (B).

The singer's vocal signal is taken out from the connection point between the amplifier (11) and the resistor (19) to the second waveform converting means (B), and even if the muting circuit (17) is activated, the singer's vocal signal is sent to the second waveform converting means (B). No muting is applied to the singer vocal signal output to (B). Also, a microphone (1
), there is no sound to the first waveform conversion means (A), so the transistors (20) (21)
Muting is applied to the singer vocal signal input to the second waveform converting means (B). In other words, when there is sound from the microphone (1), a DC signal for muting drive is given to the base of the muting transistor (17=-3), but a DC signal divided from this is used to drive the transistor (21). The transistor (20) is operated to prevent muting from being applied to the second waveform conversion means (B). When the audio input from the microphone (1) disappears, the DC signal given to the base of the transistor (17-3) disappears, so the transistor (17-3) turns off and the transistor (21) that was being driven also turns off. Therefore, the transistor (20) is connected to the switch (1
8) is applied via the resistor (16) from the output of
It is turned on by the voltage and muting is applied to the input of the second waveform conversion circuit (B). Of course, if you turn off the switch (18), the muting circuit (17)
) and the transistors (20) and (21) mentioned above will no longer operate, allowing you to enjoy normal karaoke.

Select the duet function like this and switch (]8)
is on, when there is no audio input from the microphone (1), the transistor (20)
Since the singer vocal signal input to the waveform converting means (B) is muted, it is possible to prevent the score display on the score display device (5) from being displayed randomly.

Details of the invention As explained above, the karaoke practice device of the present invention is as follows.

The score display device compares the practitioner vocal signal input from the microphone with the singer vocal signal reproduced from the recording medium, and displays the evaluation result of the practitioner vocal signal as a score, and when the duet function is selected, the practitioner A muting circuit that detects a vocal signal outputs the practice person vocal signal instead of the singer vocal signal during the practice person vocal signal detection period, and the singer vocal signal to the score display device is output by the muting circuit. Since the configuration is configured so that muting is applied during the period when the practitioner's vocal signal is not detected, when enjoying the duet function, the parts sung by the practitioner can be heard even if the practitioner is singing or not. Since the audio and the reproduced singer vocal signal of that individual door are correctly compared, the score display will not be random. Therefore, when selecting the duet function, it is also possible to evaluate the singing ability by displaying the score, which greatly increases the pleasure of using the karaoke practice device5.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a karaoke practice device having a score display function, and FIG. 2 is a block diagram of an embodiment of the karaoke practice device according to the present invention. (1)...Microphone, (5)...Score display device, (7)...Audio multiplex tape, (8) (9)...
Playback head, (14)...Power amplifier, (15)...
... Speaker, (17) ... Muting circuit, (
18)... Switch [Duet function selection switch], (20) (21)... Muting transistor

Claims (1)

[Claims] 1. The score display device compares the practitioner vocal signal input from the microphone with the singer vocal signal reproduced from the recording medium, and displays the evaluation result of the practitioner vocal signal as a score, and when the duet function is selected, the A muting circuit for detecting a practice person vocal signal outputs the practice person vocal signal instead of the singer vocal signal during the practice person vocal signal detection period, and the singer vocal signal to the score display device is outputted by the muting circuit. A karaoke practice device configured to apply muting during a period when a circuit does not detect a vocal signal from a practitioner.