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JPH1130991

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DESCRIPTION JPH1130991
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
reverberation generating apparatus for generating reverberation such as a microphone used for
karaoke and the like.
[0002]
2. Description of the Related Art In recent years, a so-called "Karaoke device" is known which
reproduces a voice signal of an accompaniment only in audio equipment, synthesizes a signal of
a microphone input according to it, and sings a song. It is widely used for Particularly when
performing karaoke, there is a reverberation generator called echo machine to add reverberation
to the input of the microphone to make it easier to sing.
[0003]
This conventional echo production device is configured as shown in FIG. In FIG. 4, reference
numeral 1 denotes a microphone (hereinafter referred to as a microphone) for converting voice
into an electric signal, and reference numeral 2 denotes an amplifier for amplifying the signal of
the microphone 1. Reference numeral 3 denotes a reverberation generating means, which
generates reverberation based on the output of the amplifier 2. Reference numeral 4 denotes a
first addition unit that adds the output of the amplifier 2 and the output of the echo generation
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unit 3. 5 is a reproduction means for reproducing accompaniment music. The second addition
means 6 adds the output of the first addition means 4 and the accompaniment music signal
output from the reproduction means 5 and outputs the result from the output terminal 7.
[0004]
The operation of the conventional echo producing apparatus configured as described above will
be described using FIGS. 4 to 6.
[0005]
In FIG. 4, the voice of the singer is first input to the amplifier 2 through the microphone 1 and
amplified to an outputtable amplitude.
The amplified signal is subjected to echo sound generation means 3 to produce an echo
component signal. The echo generation means 3 may be configured using delay means as shown
in FIG. FIG. 5 is a block diagram showing the detailed construction of the conventional echo
generation means.
[0006]
That is, in FIG. 5, the signal inputted to the input terminal 10 is inputted to the feedback addition
means 11 which adds the feedback signal. The output of the feedback addition means 11 is input
to the delay means 12 and becomes a signal delayed for a predetermined time, and is output
from the output terminal 13 and is input to the attenuation means 14 and then to the feedback
addition means 11. Here, considering the case where an impulsive signal is input, the input signal
passes through the delay means 12 and is then fed back to be added to the original signal. As it
passes through the damping means 14, its amplitude gradually decreases.
[0007]
As a result, as shown in the schematic view of the echo waveform in FIG. 6, a signal that is
gradually attenuated with an interval of delay time is obtained. This signal is similar to the
natural reflection, and in karaoke etc. it will produce a pleasant singing voice.
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[0008]
By adding the output of the echo generation means 3 to the original signal by the first addition
means 4 of FIG. 4, it is possible to add an effect having a sense of presence to the singing voice.
Generally, the output of the reproduction means 5 for reproducing the accompaniment and the
echo sound and the microphone signal are added through the second addition means 6 to obtain
an output synthesized from a speaker or the like.
[0009]
However, in the conventional method, the echo is constant and monotonous regardless of the
singing voice and the accompaniment. Therefore, as an effect of the production of the song, it
had the problem that it was hard to make a difference by how to sing and the song.
[0010]
The present invention solves the above-mentioned conventional problems, detects the voice
characteristic of the input signal, and changes the echo by the echo generation means, thereby
generating an echo that is rich in change according to the singing voice. To provide more
effective rendition by singing voice.
[0011]
SUMMARY OF THE INVENTION In order to achieve the object, a reverberation generator
according to the present invention comprises a reverberation generator for generating
reverberation from an input signal using a delay unit, and an output of the reverberation
generator. There is a configuration for changing the characteristic of the signal generated by the
echo generation unit according to the detection result of the addition unit for adding the input
signal and the sound characteristic detection unit for detecting the sound characteristic of the
input, and the sound characteristic detection unit doing.
[0012]
Also, reproduction means for reproducing a signal having an example, model extraction means
for extracting an example signal from the audio output of the reproduction means, echo sound
generation means for generating echo sound from the input signal using a delay means, echo
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According to the detection results of the adding means for adding the output of the sound
generating means and the input signal, the voice characteristic detecting means for detecting the
voice characteristic of the model extracting means, and the signal generated by the echo
producing means It is configured to change the characteristics.
[0013]
According to this configuration, a reverberation generation device can be obtained in which echo
sound is generated according to the input singing voice and the sound characteristics of the
reproduced model song.
[0014]
DETAILED DESCRIPTION OF THE INVENTION According to the first aspect of the present
invention, echo sound generation means for generating echo sound from an input signal using a
delay means, and adding an output of the echo sound generation means and an input signal The
characteristic of the signal generated by the echo generation means is changed according to the
detection result of the addition means, the speech characteristic detection means for detecting
the speech characteristic of the input, and the speech characteristic detection means, It produces
an echo that is rich in variation in tune with the singing voice, and has the effect of being able to
produce an effective effect by the singing voice.
[0015]
The invention according to claim 2 of the present invention is a reproducing means for
reproducing a signal having an exemplary signal, an exemplary extracting means for extracting
an exemplary signal from the signal output of the reproducing means, and a delaying means
from an input signal. Of echo sound generation means for generating echo sound, addition means
for adding output signal of echo sound generation means and input signal, speech characteristic
detection means for detecting speech characteristic of model extraction means, and speech
characteristic detection means The characteristic of the signal generated by the echo generation
means is changed according to the detection result, and the characteristic of the echo based on
the model is set independently of the voice characteristic of the microphone input. Have the
effect of
[0016]
Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to
3.
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(First Embodiment) FIG. 1 is a block diagram of a reverberation generation apparatus according
to the present invention. In FIG. 1, 1 is a microphone (hereinafter referred to as a microphone)
which converts voice into an electric signal, and 2 is a microphone 1 4 is a first adding means, 5
is a reproducing means for reproducing accompaniment music, 6 is a second adding means, 7 is
an output terminal, and the above are the same as those described in FIG. It is a thing.
Reference numeral 20 denotes sound characteristic detection means for detecting the
characteristic of sound from the output signal of the amplifier 2 and outputting a control signal.
Reference numeral 23 denotes echo sound generation means, which generates echo sound from
the output of the amplifier 2 in accordance with the output of the speech characteristic detection
means 20 and outputs the echo sound to the first addition means 4.
[0017]
The operation of the echo producing apparatus configured as described above will be described
with reference to FIG.
The components given the same reference numerals as in the conventional example perform the
same operations as in the conventional example, so detailed description will be omitted.
[0018]
First, the singing voice input from the microphone 1 is amplified by the amplifier 2 and input to
the echo generation means 23, the addition means 4 and the voice characteristic detection
means 20.
The voice characteristic detection means 20 detects the characteristics of the input microphone
voice.
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Here, the pitch, the rhythm, the amplitude of the voice, and the like are detected as the detected
voice characteristics. Here, a pitch that is closely related to singing voice will be described as an
example.
[0019]
That is, the voice characteristic detection means 20 detects a pitch as one example. In this case,
as a method of detecting the pitch, it is common to obtain the period of the input signal from the
zero cross point of the signal or from the peak of the waveform and obtain the pitch from the
reciprocal thereof.
[0020]
When the sound characteristic detection means 20 detects a pitch, a control signal matched to
the pitch is output. For example, when the pitch is high, a control signal with a high voltage is
output, and when the pitch is low, a control signal with a low voltage is output. Alternatively, as
another output form of the control signal, when the pitch is high, a large numerical value may be
output as a digital signal, and when it is low, a small numerical value may be output, or a certain
reference may be set. By comparison with the reference, it is possible to output a signal of "H" at
a high pitch and a control signal of "L" at a low pitch.
[0021]
As described above, the voice characteristic detection unit 20 outputs a control signal in
accordance with the detected pitch.
[0022]
Next, the control signal output from the voice characteristic detection unit 20 is input to the echo
generation unit 23.
The echo generation means 23 basically performs the same operation as the echo generation
means 3 shown in the conventional example, but differs in that a control signal is input.
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[0023]
The echo generation means 23 changes the characteristics of the echo according to the input of
the control signal. For example, the delay time, the amplitude, and the like, which are the
characteristics of the generated echo, change depending on the control signal.
[0024]
A configuration example of the echo generation means when the delay time changes will be
described with reference to FIG. In FIG. 2, 15 is a read control means of the delay means 12, 16
is a control signal input terminal of the read control means 15, and the output of the voice
characteristic detection means 20 of FIG. 1 is inputted. The other components are the same as
the components described in the conventional example.
[0025]
In the echo generation means 23, the input signal passes through the delay means 12 and is fed
back to be input again to the delay means 12 via the attenuation means 14. In such a
configuration, generation of a gradually decaying reflected sound as shown in FIG. 6 is the same
as in the conventional example. Here, the read control unit 15 controls the delay time of the
delay unit 12. For example, when the delay means 12 is a delay means requiring a clock such as
a CCD or BBD, the clock frequency is switched to control the delay time. Alternatively, in the case
where the delay means 12 has a configuration of a digital memory and a shift register, it can be
realized by switching and setting the read address and the like.
[0026]
Now, if the voice characteristic detection means 20 outputs "H" and "L" signals by comparison
with the reference, the control signal of the output "H" when the pitch is detected to be high is In
the echo generation means 23, switching is performed so as to increase the delay time of the
delay means. Conversely, in the case of the control signal of output “L” when it is detected that
the pitch is low, the delay time is set shorter than in the case of “H”.
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[0027]
As a result, when the pitch is equal to or more than a certain pitch, echo characteristics can be
produced in which the characteristics of the echo become longer. This is because when the
singing voice is high, the reverberation is further prolonged, the difference between the echoing
from the low voice and the loudness is increased, and the comfort when singing is improved.
[0028]
In particular, in the so-called "sabi" portion of the song, a high pitch is often used as compared to
a low pitch, and the delay time becomes long by this, and a residual sound tends to remain.
[0029]
As described above, the echo generation means 23 changes and outputs the echo according to
the control signal from the voice characteristic detection means 20.
The outputted echo is added to the original signal by the adder circuit 4 to become echo suitable
for singing.
[0030]
In the embodiment described above, the output of the voice characteristic detection means 20 is
described as “H” or “L”, but when the voice characteristic detection means 20 outputs the
control signal as a voltage or a numerical value, the voltage It is possible to change the delay
time by the echo generation means 23 according to the value and the numerical value, and more
detailed control is possible.
[0031]
Here, the echo generation means 23 changes the delay time according to the control signal, but it
is also possible to change the amplitude to be fed back, and further to change both the delay time
and the amplitude of the feedback signal. It is also possible.
[0032]
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As described above, according to the present embodiment, since the voice characteristic can be
detected and the echo sound can be set according to the voice characteristic, it is possible to
provide a very changeable singing easy karaoke environment. ing.
[0033]
Second Embodiment FIG. 3 is a block diagram showing a configuration of a second embodiment
of the present invention.
[0034]
In FIG. 3, 1 is a microphone (hereinafter referred to as a microphone) for inputting voice and
converting it into an electric signal, 2 is an amplifier for amplifying the signal of the microphone,
23 is echo sound generation means, 4 is a first addition means, 5 is accompaniment
Reproduction means for reproducing music, 6 is a second addition means, and 7 is an output
terminal.
Reference numeral 20 denotes sound characteristic detection means for detecting the
characteristic of sound from the output signal of the amplifier 2 and outputting a control signal.
The above is the same as that described in the first embodiment.
[0035]
Reference numeral 32 denotes model extracting means for extracting a signal serving as a model
of a song from the audio signal output from the reproducing means 5, and 20 denotes sound
characteristic detecting means which performs the same operation as in the first embodiment.
[0036]
The operation of the echo producing apparatus configured as described above will be described
with reference to FIG.
Here, the components given the same reference numerals as in FIG. 1 of the first embodiment
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operate in the same manner as the first embodiment, and thus detailed description will be
omitted.
[0037]
A major difference from the first embodiment described above is that, instead of the microphone
sound, the model signal output from the output of the reproduction unit 5 by the model
extraction unit 32 is input to the sound characteristic detection unit.
[0038]
First, to perform karaoke, music to be accompanied is played.
For reproduction of accompaniment, in general, a player for reproducing a disc such as a CD, an
LD, or a video CD is used, which corresponds to the reproduction means 5.
In the output reproduced from the reproduction means 5, there may be a case where a singing
signal and singing data to be a model are reproduced simultaneously with the audio signal to be
accompaniment.
For example, in the case of a video CD, for example, only accompaniment is recorded on one of
the two-channel audio, and accompaniment + model singing is recorded on the remaining
channels. For this reason, when it is desired to use a model song for practice, etc., the channel is
selected, and when only accompaniment is necessary, it is sufficient to select a channel only for
accompaniment.
[0039]
Now, when such a model song or a song with model data is reproduced from the reproduction
means 5, the model extraction means 32 extracts only the model song part. For example, if
subtraction of the two reproduced channels is performed and only the accompaniment signal is
canceled, only the model singing portion remains.
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[0040]
From the signal extracted by the model extraction unit 32, the voice characteristic detection unit
20 detects the voice characteristic, and a control signal corresponding to the detected signal is
output. The control signal controls the echo generation means 23 as described in the first
embodiment.
[0041]
The reason why the model signal of the reproduced signal is input to the model extraction means
32 instead of the voice of the microphone is that the sound characteristic may not be detected
from the signal of the microphone in some cases. For example, it is a case where the detection
circuit is difficult to detect, or a plurality of singing signals are mixed like a duet. Even in such a
case, accurate and continuous control of echo can be performed since the signal serving as an
example of a song is used as a reference.
[0042]
As described above, according to the present embodiment, the model song is extracted from the
reproduction means used for karaoke, the characteristic thereof is detected, and the echo
generation means is controlled. By this, even when the correct pitch can not be detected from the
singing voice from the microphone, it is possible to set the characteristic of the echo according to
the music.
[0043]
The contents described in the first embodiment and the contents described in the second
embodiment can be used in combination. At that time, when the pitch can not be detected from
the voice of the microphone, it is possible to perform smooth control by switching to model
singing automatically.
[0044]
Further, in the above description, the voice characteristic detection means has been described as
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pitch detection, but it may be means for detecting a combination with a plurality of voice
characteristics such as volume and rhythm.
[0045]
As described above, according to the present invention, echo sound generation means for
generating echo sound from an input signal using a delay means, addition means for adding the
output of echo sound generation means and input signal, and input Since the characteristics of
the signal generated by the echo generation means are changed according to the detection result
of the speech characteristics detection means for detecting the speech characteristics and the
speech characteristics detection means, echo sounds can be generated according to the change of
music It becomes possible to provide a more comfortable karaoke environment.
[0046]
Brief description of the drawings
[0047]
1 is a block diagram showing the configuration of a reverberation generation apparatus
according to a first embodiment of the present invention.
[0048]
2 is a block diagram showing the configuration of the echo generation means.
[0049]
3 is a block diagram showing the configuration of a reverberation generation apparatus
according to a second embodiment of the present invention.
[0050]
Figure 4 is a block diagram showing the configuration of a conventional echo sound generator
[0051]
Fig. 5 is a block diagram showing the configuration of the echo generation means.
[0052]
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Fig. 6 is a schematic view showing the waveform of the echo generated by the echo generation
means.
[0053]
Explanation of sign
[0054]
Reference Signs List 1 microphone 2 amplifier 3 23 echo sound generation means 4 first
addition means 20 audio characteristic detection means 32 model extraction means
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