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JPH077784

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DESCRIPTION JPH077784
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to
microphone voice input devices, and more particularly to voice shake correction for microphone
voice input.
[0002]
2. Description of the Related Art Conventionally, in a microphone voice input device, as shown in
FIG. 2, a voice inputted from a microphone 1 is amplified by a voice amplification unit 2 to a
desired level and outputted.
[0003]
Even the microphone voice input device for mobiles with large external vibration such as a
helicopter has the above configuration, so even if the input sound is blurred due to the external
vibration, the input from the microphone 1 is input. The voice is amplified as it is by the voice
amplification unit 2 to a desired level.
[0004]
SUMMARY OF THE INVENTION In the above-described conventional microphone voice input
device, when mechanical modulation is applied to the voice of the speaker due to external
vibration or the like, the quality of the voice signal to be converted into an electrical signal is
significantly degraded. And it is difficult to remove the quality deterioration.
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1
[0005]
Therefore, an object of the present invention is to provide a microphone voice input device
capable of solving the above-mentioned problems and reducing the degradation of voice signal
quality due to mechanical modulation.
[0006]
According to the present invention, there is provided a microphone voice input device
comprising: detection means for detecting an external vibration in the vicinity of a voice source
of a voice input from the microphone; and an external vibration detected by the detection means.
And a correction unit configured to correct voice input from the microphone.
[0007]
Next, an embodiment of the present invention will be described with reference to the drawings.
[0008]
FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.
In the figure, when an input voice causing voice shake due to external vibration by a moving
object such as a helicopter is input from the microphone 1, the input voice is amplified to a
desired level by the voice amplification unit 2 and the voice shake correction processing unit
Output to 4.
[0009]
The external vibration detection unit 3 is installed near the throat of the speaker who inputs the
input voice from the microphone 1. When external vibration is detected near the speaker's
throat, the external vibration detection signal generated based on the external vibration is It is
output to the voice shake correction processing unit 4.
[0010]
That is, when detecting the external vibration, the small-sized piezoelectric vibration gyro 31 of
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2
the external vibration detection unit 3 outputs the angular velocity of the magnitude of the
external vibration to the integrator 32.
The integrator 32 integrates the angular velocity from the small-sized piezoelectric vibration
gyro 31 to convert it into a magnitude / phase signal of external vibration, and outputs this
signal to the amplifier 33.
[0011]
The amplifier 33 amplifies the signal from the integrator 32 to a desired level, and outputs the
amplified signal to the voice shake correction processing unit 4 as an external vibration detection
signal.
[0012]
The voice shake correction processing unit 4 adaptively adjusts the level and phase of the
external vibration detection signal from the external vibration detection unit 3 so as to cancel out
components such as external vibration causing voice blurring of the voice input from the
microphone 1 Adjust to
The voice shake correction processing unit 4 adds the adjusted signal to the input voice causing
the voice shake to perform correction processing, and outputs the corrected signal to the outside
as an input voice signal.
[0013]
In this manner, the voice shake component of the input voice input from the microphone 1 is
canceled by the external vibration detection signal generated by the external vibration detection
unit 3 based on the external vibration detected near the throat of the speaker. By performing the
correction processing in the correction processing unit 4, it is possible to reduce or prevent voice
blurring, so it is possible to reduce the quality deterioration of the audio signal due to the
mechanical modulation.
[0014]
As described above, according to the present invention, the external vibration in the vicinity of
the voice source of the voice input from the microphone is detected, and the voice input from the
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microphone is corrected based on the detected external vibration. By doing this, it is possible to
reduce the quality deterioration of the audio signal due to the mechanical modulation.
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