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DESCRIPTION JP2016502311

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DESCRIPTION JP2016502311
A system for detecting speech signals associated with speech using a laser based detection means
comprising a mask configured to be worn on the face part of the speaker so as to cover the
mouth of the speaker, said method comprising The mask reflects at least one area of the mask
that reflects the collimated electromagnetic signal and at least one reflective coating for detecting
speech signals associated with the speech of the speaker using the collimated electromagnetic
signal. And a laser microphone configured to detect a vibration. The reflective coating area of the
mask can improve the detection of vibrations resulting from speech made by the speaker
wearing the mask.
System and method for detecting speech signals associated with speech using laser microphones
[0001]
This application claims the benefit of co-pending US patent application Ser. Claim priority to
13/664, 470, which is incorporated herein by reference in its entirety.
[0002]
The present invention relates generally to devices, apparatus, systems and methods for detecting
audio signals, and more particularly to devices for optical detection of audio.
[0003]
Optical microphones can optically detect speech signals associated with human speech, and light
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signals are so sensitive to facial vibrations that they can rely on facial vibrations for speech
detection. is there.
However, the output of the optical microphone is much lower than the signal quality of a
commonly used voice microphone based on a transducer that produces an oscillating current in
response to air vibrations associated with speech.
[0004]
U.S. Pat. No. 5,015,099, which is incorporated by reference in its entirety. 7775113 and U.S.
application no. 11/841, 134, in particular, an optical transmitter and receiver for receiving and
transmitting optical signals (beams) for optical detection of speech signals associated with
speech, by detection of the associated speaker's facial vibration An optical microsystem is
disclosed.
These optical microphones can use techniques such as, for example, vibrometers, self-mixing and
/ or interferometry for the detection of audio signals.
[0005]
According to some embodiments of the present invention, a system for the detection of speech
signals of speech signals associated with speech by using a laser based detection means, the face
of the speaker covering the speaker's mouth The mask includes a mask configured to be worn on
the part, the mask including at least one reflective coating covering at least a region of the mask
that reflects the collimated electromagnetic signal, and the speaker's speech using the collimated
electromagnetic signal And a laser microphone configured to detect vibrations in the reflective
coating area for detection of the associated audio signal. The reflective coating area of the mask
can improve detection of vibrations resulting from speech made by a speaker wearing the mask.
[0006]
Optionally, the reflective coating comprises at least one patch having a reflective surface, each
patch being attached to a mask. Instead, the reflective coating comprises a coating layer covering
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at least one area of the mask. In another embodiment, at least one of the masks is made of a
reflective material.
[0007]
According to some embodiments of the present invention, the laser microphone uses vibrometer,
self-mix and / or interferometry techniques to detect audio vibrations.
[0008]
Optionally, the laser microphone is configured to transmit coherent laser light towards the area
of the mouth of the speaker covered by the mask, and detects the reflected light signal from the
reflective coating And a processor for processing the detection signal to detect the audio signal.
[0009]
According to some embodiments, the laser microphone is connected to at least one processor
that processes the detection signal to detect an audio signal from the output of the laser
microphone, said processor being at least one noise reduction algorithm May be configured to
operate.
[0010]
According to some embodiments of the present invention, the system further comprises one or
more audio output devices, such as speakers, for outputting an audio output signal of the laser
microphone.
[0011]
Figure 1 schematically illustrates a system for optical detection of speech signals associated with
speech including a facial mask having a plurality of attached reflective patches, according to
some embodiments of the present invention.
Fig. 5 schematically shows a system for optical detection of speech signals associated with
speech including a mask of the face covered by a reflective layer according to another
embodiment of the present invention.
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Fig. 5 schematically illustrates a process / method for detection of speech signals associated with
speech using laser based detection according to some embodiments of the present invention.
[0012]
In the following detailed description of various embodiments, reference numerals have been
added to the accompanying drawings which form a part thereof and are shown to represent
particular embodiments in which the present invention may be practiced.
It is understood that other embodiments may be utilized and structural changes may be made
without departing from the scope of the present invention.
[0013]
Some embodiments of the invention provide a system for laser based detection of speech signals
associated with speech.
According to some embodiments, the system comprises a mask configured to be worn on the
face portion of the speaker covering the speaker's mouth with one or more reflective surfaces,
and a voice associated with the speaker's speech An optical microphone configured to optically
detect vibration of the reflective surface or surface for detection of a signal.
[0014]
The one or more reflective surfaces may be attached to the mask (e.g., using reflective patches
attached to areas on a normal face mask through an adhesive) or to cover the area of the mouth
worn by the speaker The mask is covered by having a reflective layer covering at least one area
of the mask configured in
[0015]
The optical microphone comprises a laser light transmitter which transmits coherent laser light
towards the area of the mouth of the speaker covered by a special mask, and a corresponding
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light receiver / sensor for detecting its reflected light signal. Have.
Various features of the difference between the transmitted light signal and the reflected and
received light signal are used to detect and extract features of the speech signal associated with
speech. Optical microphones are based on vibration detection techniques such as, for example,
vibrometers, self-mixing and / or interferometry.
[0016]
The mask may be designed as a surgeon's mask, is made of a lightweight material, and has a
strap to hold a worn on the face by tying a strap over the ear. One or more reflective surfaces
attach (eg, adhere) one or more light reflective patches onto a standard surgeon's mask and
cover the mask with a coating layer adhered to it or on the mask It is attached to the mask by
using other techniques to create the reflective area.
[0017]
Referring to FIG. 1, a system 100 for optical detection of speech signals associated with speech
according to some embodiments of the present invention is schematically illustrated. The system
100 comprises one or more of (i) an optical microphone 110, (ii) a mask 150 configured to be
worn on the face portion of the speaker 10 covering the speaker's mouth area, and (iii) a speaker
130. And an audio output device.
[0018]
As shown in FIG. 1, according to some embodiments, the system 100 may also be capable of
receiving data / signals from the optical microphone 110 and outputting data associated with
speech signals of speech. And a computer processor 120 for processing and data storage 125 for
storing processed data and / or raw data of the optical microphone.
[0019]
As shown in FIG. 1, according to these embodiments, the mask 150 includes a number of
reflective surfaces 151a and 151b mounted over the mouth area of the speaker 10. As shown in
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FIG.
For example, the reflective patches 151a and 151b may be adhered to a standard surgeon's mask
or may be printed thereon using cloth printing techniques.
[0020]
According to some embodiments, the light microphone 110 transmits an infrared (IR) signal as
the speaker 10 speaks and reflects the IR light signal reflected from the reflective surface as well
as the non-reflective surface of the mask 150. An IR transmitter and receiver are provided that
receive and output signals or data indicative of the audio signal associated with the speech
output by the speaker 10.
[0021]
The mask blocks the air exhaled by the speaker during speech, thus improving the vibrations
associated with speech, and thus the ability to selectively detect vibrations associated with
speech.
The addition of a reflective surface further enhances the ability and quality of speech-related
vibration detection in the speaker's mouth area.
[0022]
For example, the optical microphone 110 may transmit and reflect light (e.g., an interferometer
that outputs data and / or data indicating the difference between the transmitted and reflected
signals (such as phase shift there between) , IR) means for performing interferometry between
the signals. In other cases, the optical microphone 110 uses self-mixing of the transmit and
reflected signals to output data / signals indicative of audio data / signals associated with speech.
[0023]
In another embodiment, coherent electromagnetic laser light / waves in the non-visible frequency
range can reflect (eg, painted, covered or coated) collimated electromagnetic signals in the non-
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visible frequency range Reflective surfaces may be used instead of light signals.
[0024]
Referring now to FIG. 2, another similar system 100 'for optical detection of speech signals
associated with speech is schematically illustrated in accordance with some embodiments of the
present invention.
The system 100 'comprises (i) the same optical laser microphone 110, and (ii) another type of
mask 150' worn on the face portion of the talker 10 and configured to cover the mouth area of
the talker ( iii) An audio output device 130, (iv) a computer processor, and (v) a data storage
device 125. The mask 150 ′ has an overlying coating layer 251 that reflects at the signal area
corresponding to the area of the laser microphone 110.
[0025]
Referring now to FIG. 3, a flow chart schematically illustrating a process / method for detecting
speech signals associated with speech using laser based detection according to some
embodiments of the present invention. is there. The method comprises (i) transmitting a
collimated electromagnetic signal (e.g. a light IR signal) using a laser based microphone 31 and
(ii) in relation to the signal transmitted using said laser microphone Receiving reflected signals
reflected from the reflective surface of the mask worn by the speaker 32, (iii) using optical means
such as eg interferometry or self-mixing means, and / or (wavelength / frequency, Processing the
reflected signal for its corresponding transmitted signal, either by analyzing the characteristics of
the received reflected signal against known characteristics of the transmitted signal, such as
intensity, phase, etc. iv) outputting the retrieved audio signal 34 associated with speech as either
data and / or audio signal.
[0026]
The method may optionally include amplifying the extracted audio signal 35 and then outputting
it using an audio output means such as a speaker 36 or the like.
[0027]
According to some embodiments of the present invention, one or more of the noise reduction,
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amplification and filtering techniques, such as voice activity detection (VAD) techniques, comb
filtering, etc., the height of the associated speaker who wears the mask May be used to output an
audio signal.
[0028]
Numerous changes and modifications are possible to one skilled in the art without departing
from the spirit and scope of the present invention.
Therefore, the described embodiments are shown for the purpose of illustration only and should
not be limited to the following invention and its various embodiments and / or the invention as
defined by the following claims. Must be understood.
For example, notwithstanding the fact that the components of the claims are presented in the
following specific combinations, the present invention includes other combinations of fewer,
more or different components, and such combinations may be claimed first. It should be clearly
understood that the above disclosure should be made even when not. The teaching that two
claimed components are combined into one claimed combination should be further understood
as allowing one claimed combination where two components are not coupled to each other, It
may be combined alone or in any other combination. Deletions of the disclosed components of
the invention are expressly considered within the scope of the invention.
[0029]
Therefore, the definition of terms or components in the following claims is not only a
combination of components shown literally, but substantially the same function in substantially
the same way to obtain substantially the same result. Defined herein as also including all
equivalent structures, materials or acts for achieving In this sense, equivalent substitution of two
or more components is done for any one of the components of the following claims, and one
component is substitution of two or more components of one claim. Can be considered. While the
components are described above as being performed in certain combinations, and as originally
claimed, one or more components from the claimed combination may in some cases be removed
from the combination and claimed It is clearly understood that combinations are directed to
subcombinations or variations of subcombinations.
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[0030]
Insubstantial changes from the claimed subject matter as observed by the person skilled in the
art and now known or later devised are considered to be equivalent to those which are within the
scope of the claims. As such, substitutes or those later known to those of ordinary skill in the art
are defined to be within the scope of the defined components.
[0031]
Accordingly, it is understood that the claims include what has been particularly shown and
described above, which is conceptually equivalent, which is obviously substitutable, and which
inherently incorporates essential ideas of the present invention. It should.
[0032]
Although the present invention has been described in detail, changes and modifications that do
not depart from the teachings of the present invention will be apparent to those skilled in the art.
Such changes and modifications are considered to fall within the scope of the present invention
and the appended claims.
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