JP2001034277A - Karaoke device with muffling function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To muffle a singing voice so that the singing voice to a microphone should not propagate to other rooms and neighbors' even if a user sings loudly to his/her heart's contents at the time of making a practice in KARAOKE. SOLUTION: This KARAOKE device reproduces music data into a music signal by a music reproduction part, and sends the music signal to a user's headphone through a mixture circuit, and the user sings before a microphone 4 to the music sound performed by the headphone. The device inputs the singing voice signal from this microphone 4 further to a phase inversion part 5, and converts this singing voice signal into the inverted singing voice signal of an opposite phase, and sends the inverted singing voice signal to a speaker 6. A live singing sound wave spread in air is negated by radiating in the air the inverted singing voice wave of the opposite phase to the singing voice wave discharged into surroundings at the time of singing before the microphone 4.

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 a karaoke apparatus having a sound deadening function using an active noise control.

[0002]

2. Description of the Related Art Generally, in a communication type karaoke apparatus, music data (MIDI data) among karaoke data received from an external karaoke center is reproduced as a music signal by a music reproducing section and sent to a Qin amplifying section. . The music signal (performance data) is amplified by the Yun amplifying section and input to the other input end of the mixer section. The singing voice from the microphone is amplified by the voice amplifier and input to one input terminal of the mixer.

[0003] Conventionally, when enjoying karaoke alone or practicing singing a song at home, a mixer mixes a singing voice signal and a performance signal and sends them only to headphones. The singing signal and the performance signal are also sent to the speaker of the television device, but if they leak to the outside, they will make noise for others around them, so lower the volume or listen or disconnect.

[0004]

In the conventional karaoke apparatus, as long as the singing voice signal and the performance signal are heard through the headphones, the performance music does not generate noise from other people. However, the voice toward the microphone of the singer (the voice that sings raw) naturally travels through the air as well as the microphone and naturally propagates outside. Therefore, when singing into a microphone with a loud voice like a singing (or a complete sound) at home or the like, one's own voice (sound wave) can often be heard directly by the family, or can be heard by a neighbor through an open window or a wall. For this reason, they are ashamed to practice karaoke and sing songs to entertain. That was a shackle for the spread of karaoke. SUMMARY OF THE INVENTION It is an object of the present invention to mute a karaoke at home so that a singing voice directed to a microphone will not propagate to another room or a neighboring area even when singing with a loud voice.

[0005]

According to a first aspect of the present invention, a tune database located in a remote place is accessed from a kaoke terminal via a communication line to request a desired tune, and karaoke data of the tune is received. The music data is reproduced by the music reproducing unit, the music signal is sent to the user's headphones through the mixing circuit, and the user sings into the microphone according to the music sound played from the headphones and sings into the air. A karaoke device that inputs a singing voice signal from a microphone to the mixing circuit and simultaneously listens to the mixed music sound and the singing voice sound from the headphones so that the mixed voice does not leak to the outside. At
A singing voice signal from the microphone is further input to a phase inverting unit,
The singing voice signal is converted into an inverted singing voice signal having an opposite phase, the inverted singing voice signal is sent to a speaker, and the singing voice sound wave of the user and the inverted singing sound wave having the opposite phase to the user are radiated into the air. The propagating singing sound wave is canceled.

In the second invention, desired music data is read from a music database, a music signal is reproduced by a music reproducing unit, the music signal is sent to a user's headphones through a mixing circuit, and a music sound to be played from the headphones is generated. Together,
A user sings into the microphone and emits a singing sound wave into the air, inputs a singing signal from the microphone to the mixing circuit, and simultaneously listens to the mixed music sound and singing sound from the headphones, In a karaoke apparatus in which the mixed voice is prevented from leaking, the singing voice signal from the microphone is further input to a phase inverting unit, the singing voice signal is converted into an inverted singing voice signal of an opposite phase, and the inverted singing voice signal is transmitted to a speaker. Sending, by radiating from the speaker a singing voice sound wave of the opposite phase to the user's singing sound wave into the air,
The singing sound wave propagating in the air is canceled.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, the overall configuration of the karaoke apparatus of the present invention will be described. The karaoke terminal 1 is, for example, a home-use MI that receives performance data from the outside by communication.
DI playback device. The Kararake terminal 1 receives the requested song data from the external song database via the overseas line 19, and converts the background image and the lyrics telop (character) to the TV.
Is displayed on the screen 3. Further, the Karaoke terminal 1 reproduces the performance music from the performance data, sends it to the headphones 2, and inputs the singing voice of the user from the microphone 4.

The singing voice signal from the microphone 4 is transmitted to the karaoke terminal 1
And is mixed with the performance data and sent to the headphones 2. On the other hand, the singing voice signal from the microphone 4 is
The inverted singing voice signal is sent to the speed 6. So in the air in front of the user,
In FIG. 1, the singing sound wave generated by the direct utterance of the user and the inverted singing sound wave from the speaker 6 interfere with each other. In FIG.

Referring now to FIG. 2, the present invention will be described in more detail. The Kararake terminal 1 is composed of a communication modem 10, a central control unit CPU 11, a music reproducing unit 12, a video reproducing unit 13, an audio amplifying unit 14, an amplifying unit 16 and a mixer unit 17. The modem 10 is a telephone line. Communication with an external karaoke center is possible through the communication line 19. The microphone 4 is arranged in the audio amplifier 14, and the audio amplifier 14 amplifies the singing voice from the microphone 4 and inputs the amplified singing voice to one input terminal of the mixer 17.

Music data (MIDI data) of the karaoke data received from the outside via the modem 10 is transferred to the music reproducing unit 12, reproduced as a music signal by the music reproducing unit 12, and transmitted to the performance amplifier 16. Can be The music signal (performance data) is amplified by the Qin Yun amplifying section 16 and input to the other input end of the mixer section 17. The mixer section 17 mixes the singing voice signal and the performance signal and outputs the mixed signal to the headphones 2. send. On the other hand, of the karaoke data, the image religion (the background image and the singing character telop) are transferred to the image reproducing unit 13, where they are reproduced as images and character codes and sent to the shochu 3 of the television device (TV).

The output terminal of the mixer 17 is turned on.
An off switch 18 is connected in series, and an output end of the on / off switch 18 is connected to a TV beaker. The phase inversion device 5 includes an input-side analog / digital converter (A / D) 20 and an active noise control A
NC unit 15 and digital / analog converter D / on the output side
A21 and, for example, four amplifiers 22, each amplifier 22 outputs an inverted audio signal to each corresponding speech force 6. The number of the amplifiers 22 and the number of the speakers 6 can be determined as appropriate based on experiments for pursuing a noise reduction effect and economy.

Here, the ANC unit 15 will be described with reference to FIG. The ANC unit 15 is a circuit that generates a waveform (inverted sound signal) having the same amplitude in reverse phase with respect to the input sound signal. In FIG. 4, the waveform A of the solid line is the source sound, and the waveform B of the dotted line is the inverted sound. That is, by combining an additional sound source waveform B (inversion sound signal) with the noise waveform A in the air, a combined waveform O can be obtained. The noise waveform A and the additional sound source waveform B cancel each other out in the air. Can mute together

In FIG. 3, the background image and the lyrics sent from the karaoke terminal 1 are reflected on the screen 3 of the TV, and the music played flows on the headphones 2. Although the user (singer) is omitted in FIG. 3, the singer with the headphones 2 set on the head sings toward the microphone 4 while watching the screen 3. The singing voice signal from the microphone 4 is sent to the karaoke terminal 1 and the phase reversing device 5, and the user (singer) practices while listening to his singing voice and performance music from the headphones 2.

On the other hand, four speakers 6 from the phase inversion device 5
The inverted singing voice signal is sent to the singer, and the inverted singing voice is emitted from the four surrounding speakers 6 into the air toward the singer. The singing voice (live voice) sung by the user (singer) toward the microphone 4 is transmitted as sound waves in the air. Will cancel each other out. User (singer)
Can be heard only in the vicinity of the microphone 4, but the singing voice (raw voice) is lost inside the area surrounded by the four speakers 6.

In the above description, the karaoke data is received from the outside via the communication line 19,
D, a hard disk, a tape, or the like, and a music played on the karaoke apparatus side may be used. This operation is almost the same as that of the communication karaoke terminal mode, and the description is omitted.

[0016]

According to the present invention, the singing voice (live voice) of the user does not propagate to the outside, and the user (singer) can practice with a very loud voice toward the microphone 4. Therefore, since hesitation to the family and the neighborhood is reduced, the home karaoke apparatus is easily used, and the usage rate can be expected to increase.

[Brief description of the drawings]

FIG. 1 is a basic configuration diagram of a karaoke apparatus with a sound deadening function according to the present invention.

FIG. 2 is an overall block circuit diagram of a karaoke apparatus with a sound deadening function according to the present invention.

FIG. 3 is a detailed configuration diagram of a karaoke device with a sound deadening function according to the present invention.

FIG. 4 is a waveform diagram of an active noise control used in the karaoke apparatus with a sound deadening function of the present invention.

[Description of Signs] 1 Kararake Terminal 2 Headphones 3 Screen 4 Microphone 5 Phase Inverter 6 Speaker 10 Modem 11 CPU 12 Music Playback Unit 13 Video Playback Unit 14 Audio Amplification Unit 15 Active Noise Control ANC Unit 16 Yunen Amplification Unit 17 Mixer section 18 ON / OFF switch 19 Communication line 20 Analog / digital converter (A / D) 21 Digital / analog converter D / A 22 Amplifier

Claims (2)

[Claims] 1. A tune database located at a remote place is accessed from a kaoke terminal via a communication line to request a desired tune, karaoke data of the tune is received, and the tune data is converted to a tune signal by a tune reproduction unit. Play, send the music signal to the user's headphones through the mixing circuit, and in accordance with the music sound played from the headphones, the user sings into the microphone and emits singing sound waves into the air, and the singing signal from the microphone Is input to the mixing circuit, so that the mixed music sound and the singing sound are simultaneously heard from the headphones, and the mixed sound is prevented from leaking to the outside. The singing voice signal is input to a phase inverting unit, the singing voice signal is converted into an inverted singing voice signal of an opposite phase, and the inverted singing voice signal is sent to a speaker. A karaoke apparatus with a muffling function, wherein the singing sound wave propagating in the air is canceled by radiating into the air an inverted singing sound wave having an opposite phase to the singing sound wave of the person. 2. A desired music data is read from a music database, a music signal is reproduced by a music reproducing unit, and the music signal is sent to a user's headphone through a mixing circuit. A person sings into a microphone and emits a singing sound wave into the air, inputs a singing voice signal from the microphone to the mixing circuit, and simultaneously listens to the mixed music sound and singing sound from the headphones, In a karaoke apparatus in which this mixed voice is prevented from leaking, a singing voice signal from the microphone is further input to a phase inverting section, the singing voice signal is converted into an inverted singing voice signal of an opposite phase, and the inverted singing voice signal is sent to a speaker. The singing voice sound wave propagating in the air is emitted from the loudspeaker by radiating the inverted singing sound wave having the opposite phase to the user's singing sound wave into the air. A karaoke device with a silencing function, characterized in that the karaoke device is silenced.