JPH0844382A - Voice signal reproducing device - Google Patents

Abstract

PURPOSE:To provide voice outputs having presence by synthesizing a common echo component by a single delay circuit with respect to plural microphone inputs. CONSTITUTION:In the case changeover switches 16, 17 are connected to A sides, the fundamental voice output of a microphone amplifier 3 is synthesized with a common echo voice output and the Lch voice signal of a voice reproducing device 8 by an adding circuit 9. Similarly, the fundamental voice output of a microphone amplifier 4 is synthesized with the common voice output and the Rch voice signal of the voice reproducing device 8 by an adding circuit 10. These Lch and Rch synthesized voices are outputted to an Lch speaker 14 and an Rch speaker 15 by power amplifiers 12, 13. In this case, since vocals do not become a monaural in a duetto playing, a duetto playing having presence is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an audio signal reproducing device, and more particularly to an audio signal reproducing device for providing a sound having a sound field to a plurality of microphone inputs by a single delay circuit. is there.

[0002]

2. Description of the Related Art In recent years, along with the popularization of karaoke, many karaoke systems have been developed that allow ordinary households to easily enjoy karaoke.

A conventional audio signal reproducing apparatus will be described below. FIG. 2 is a block diagram of a conventional audio signal reproducing device.

In FIG. 2, 1 is a first microphone for collecting sound, 2 is a second microphone, 3 is a first microphone amplifier for amplifying the sound collected by the microphone 1, and 4 is a microphone 2. A second microphone amplifier for amplifying the sounded sound, 5 is a first addition circuit for adding the outputs of the microphone amplifiers 3 and 4, 6 is a delay circuit for delaying the addition output of the addition circuit 5, and 7 is for the addition circuit 5. A second addition circuit for adding the addition output and the delay output of the delay circuit 6, 8 is an accompaniment reproducing section for reproducing accompaniment music, 9
Is the left channel of the accompaniment playback unit 8 (hereinafter referred to as Lch)
Third addition of the audio output and the delayed audio output of the adder circuit 7
Adder circuit 10, a fourth adder circuit for adding the right channel (hereinafter, referred to as Rch) audio output of the accompaniment reproducing unit 8 and the delayed audio output of the adder circuit 7, and 12 is a first driver for driving the Lch speaker 14. And a reference numeral 13 is a second drive circuit for driving the Rch speaker 15.

The operation of the conventional technique configured as described above will be described below. The voices collected by the microphones 1 and 2 are amplified to a predetermined amplitude by the microphone amplifiers 3 and 4, added by the adder circuit 5, and synthesized into monaural voice. This monaural voice is delayed by the delay circuit 6 for a certain period of time, and is added to the monaural voice before being delayed by the adding circuit 7 to become a monaural voice to which an echo component is added (hereinafter referred to as echo-containing mono voice). This mono voice with echo is combined with the Lch signal of the accompaniment music reproduced by the accompaniment reproducing unit 8 by the adding circuit 9, and similarly with the Rch signal by the adding circuit 10. These synthetic voices are output to the Lch speaker 14 and the Rch speaker 15 by the drive circuits 12 and 13.

[0006]

However, in the above-mentioned configuration, sound is collected by the first and second two microphones 1 and 2 and output by the first and second two speakers 13 and 14. In spite of this, the voices individually collected by the two microphones are combined by the adder 5 and output from each speaker as monaural voice. Therefore, even if two singers perform a duet, the synthesized monophonic singing voices are output from the first and second speakers, and the atmosphere of the duet is impaired.

Further, if the adder 5 is omitted and the voices individually collected by the two microphones are to be output from the two speakers without being synthesized, a delay circuit for adding an echo component is required. This is necessary for each of the 1 side and the microphone 2 side, which causes a problem of increasing the cost of the circuit.

An object of the present invention is to solve the above-mentioned problems, and an object thereof is to provide an audio signal reproducing apparatus which can obtain a sound field feeling without a feeling of strangeness even though it is a single delay circuit.

[0009]

In order to achieve this object, the present invention mixes a sound signal input by at least two microphones with a sound signal output from an accompaniment reproducing means for outputting an accompaniment sound. And a first mixing means for mixing the signals output from the two microphone amplification circuits, the at least two microphone amplification circuits amplifying the sounds collected by the two microphones. And at least two selecting means for selecting and outputting either the signal output from the microphone amplifying circuit or the signal output from the mixing means, a delay circuit for delaying the signal mixed by the mixing means, and selecting At least two second mixing means for mixing the output signal of the means, the output signal of the delay circuit, and the output signal of the accompaniment reproducing means, and two second mixing means, respectively. At least 2 for outputting audio signals
And one output means.

[0010]

According to the present invention, since the basic sound of the microphone is output from each individual speaker and the common echo component is added to the basic sound of the microphone, the echo produced by a single delay circuit causes a feeling of strangeness. It becomes possible to provide a feeling of no sound field.

[0011]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of an audio signal reproducing apparatus according to this embodiment. In FIG. 1, the same components as those of the related art are designated by the same reference numerals and the description thereof will be omitted. 16
Is a first switch for selecting and outputting either the signal output from the microphone amplifier 3 or the signal output from the adder 5, and 17 is the signal output from the microphone amplifier 4 or output from the adder 5. The second changeover switch selects and outputs any one of the signals to be output.

The operation of the present embodiment configured as described above will be described below. First, the sounds collected by the microphones 1 and 2 are respectively collected by the microphone amplifier 3
Amplified to a predetermined level at 4 and 4. The outputs of the microphone amplifiers 3 and 4 are combined by the adder circuit 5, and the delay circuit 6
Is delayed by a certain time, and becomes a voice of an echo component common to the microphones 1 and 2. This delayed signal is added by the adder 9 with the output signal of the changeover switch 16 and the output signal of the Lch of the accompaniment reproducing unit 8. Similarly, the adder 10 also adds the output signal of the changeover switch 17 and the output signal of the Rch of the accompaniment reproducing unit 8. The output signal of the adder 9 is output from the speaker 14 via the power amplifier 12. Also, the output signal of the adder 10 is passed through the power amplifier 13
It is output from the speaker 15.

Here, when the changeover switches 16 and 17 are connected to the A side, the sound output of the microphone amplifier 3 is synthesized by the adder circuit 10 with the delay signal output from the delay circuit 6 and the Lch sound signal of the accompaniment reproducing section 8. And becomes an Lch combined signal. Similarly, the basic audio output of the microphone amplifier 4 is combined with the delayed signal output from the delay circuit 6 and the Rch audio signal of the accompaniment reproducing unit 8 by the adder circuit 11, and R
It becomes a ch composite signal. This Lch and Rch synthesized voice is supplied to the Lch speaker 1 by the power amplifiers 12 and 13.
4, output to the Rch speaker 15. In this case, the vocal sound is not monaural in the duet performance, the delay signal is added to the basic sound signal from the microphone 1 and output from the speaker 14, and the delay signal is added to the basic sound signal from the microphone 2. Speaker 15
Since it is output from, it is possible to provide a duet performance with a sound field feeling.

Next, when the changeover switches 16 and 17 are connected to the B side, the basic voice outputs of the microphone amplifiers 3 and 4 are combined by the adding circuit 5 to become a monaural signal. Next, the adder circuits 10 and 11 combine the output signal of the delay circuit 6 and the Lch and Rch audio signals of the accompaniment reproducing unit 8. These synthesized voices are output to the speakers 14 and 15 by the power amplifiers 12 and 13. In this case, as in the conventional case, the vocal sound output in the duet performance is monaural.

As described above, according to the present embodiment, the changeover switches 16 and 17 are provided so that it is possible to switch whether or not the voices of the microphones 1 and 2 are synthesized. Is output from the speaker 14, and the voice collected by the microphone 2 can be output from the speaker 15. Further, only one delay circuit for adding an echo component to each voice is required.

[0017]

As described above, according to the present invention, even when two singers sing simultaneously, each basic voice is output from an individual speaker, and only the echo component is output as a monaural voice from both speakers. Therefore, it is possible to provide a feeling of sound field without any discomfort.

Further, by providing the changeover switch, it is possible to obtain the above-described effects with a single delay circuit, and it is possible to change the basic voice to monaural voice as required.

[Brief description of drawings]

FIG. 1 is a block diagram of an audio signal reproducing device according to an embodiment of the present invention.

FIG. 2 is a block diagram of a conventional audio signal reproducing device.

[Explanation of symbols]

 1 Microphone 2 Microphone 3 Microphone amplifier 4 Microphone amplifier 5 Adder 6 Delay circuit 8 Accompaniment playback section 9 Adder 10 Adder 14 Speaker 15 Speaker 16 Changeover switch 17 Changeover switch

Claims (1)

[Claims] 1. An audio signal reproducing apparatus which mixes and outputs an audio signal input by at least two microphones and an audio signal output by an accompaniment reproducing means for outputting an accompaniment sound, the two microphones. At least two microphone amplifying circuits for amplifying the sounds collected by
First mixing means for mixing the signals output from the two microphone amplification circuits, and at least one of the signal output from the microphone amplification circuit or the signal output from the mixing means is output. Two selecting means, a delay circuit for delaying the signal mixed by the mixing means, and at least two second mixing means for mixing the output signal of the selecting means, the output signal of the delay circuit and the output signal of the accompaniment reproducing means. An audio signal reproducing device comprising: two mixing means; and at least two output means for outputting the audio signals respectively mixed by the two second mixing means.