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JP2000209698

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Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JP2000209698
[0001]
The present invention relates to a mobile radio communication device such as a PHS or a
portable telephone, or a receiver or the like according to a change in hearing due to the age of a
user who uses an audio device such as a television or stereo. The present invention relates to a
voice correction device capable of correcting frequency characteristics and levels of voices and a
mobile device with a voice correction function.
[0002]
2. Description of the Related Art In recent years, with the spread of wireless mobile devices such
as PHS, mobile telephones and car telephones, the owner using these wireless mobile devices is
not limited to young people and adults with good hearing, and hearing loss. It is also used and
owned by many elderly people.
[0003]
In general, human hearing has a level at which sound can not be heard due to hardening of the
transmission system such as the tympanic membrane and the ossicles and muscles of the cochlea
base as the age increases (hereinafter referred to as minimum audible limit) Will rise.
FIG. 7 shows the earpiece characteristics in which the average rise in the minimum audible limit
with age is expressed based on the minimum audible limit around 20 years old. As apparent from
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FIG. 7, as the age increases, the minimum audibility limit to the received voice in the high region
above 2 kHz increases, and the quality of the voice output from the receiver of the mobile station,
that is, the intelligibility deteriorates. It becomes difficult to hear the sound. In particular, it can
be seen that the rise in minimum audibility at the age of 40 to 50 is significant. Therefore, if the
frequency characteristics of the received speech are corrected so that the minimum audible limit
of the received speech due to the age falls to zero level, it becomes possible for the users of 40
generations or more to clearly hear the speech from the receiver.
[0004]
However, in the conventional mobile phones such as PHS and portable telephones, most of them
are not designed in consideration of the auditory change due to the age of the user. There is a
problem that the voice output from the receiver of the mobile station is difficult to hear or the
sound is felt small. Also, in recent years, in order to solve the above-mentioned problems, mobile
units provided with an equalizer function for correcting the frequency characteristic of the sound
output from the receiver are commercially available. However, the setting parameters of the
equalizer used in such a mobile unit are not sufficient, and as a result, the frequency
characteristics of the voice are adjusted so that clear voice can be obtained according to the
auditory change due to the user's age. There is a problem that it is extremely bothersome and
poor in practicality.
[0005]
The present invention has been made to solve the above-described conventional problems, and
easily corrects the frequency characteristics and level of voice output from a receiver or the like
in accordance with age-related auditory changes by a simple operation of the user. It is an object
of the present invention to provide a voice correction device that can be used and a transfer
device with a voice correction function.
[0006]
SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is an
audio correction device which corrects frequency characteristics and level of audio output from a
receiver in accordance with the deterioration of hearing ability by the user's age group.
Frequency band dividing means for dividing an audio frequency range of a reception speech
signal to the receiver into a plurality of bands using a bulk scale created based on a critical
bandwidth of hearing in psychoacoustics; For each of the bands divided by the band dividing
means, a weighting function is used as a reception parameter to correct the change in the
minimum audible limit that can not be heard as the user's age increases for each band to the
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audible range where the sound is audible From the storage means based on the storage means
for storing by generation of the user, the input means for inputting the age information of the
user, and the age information input from the input means Parameter determination means for
selecting and determining reception parameters of each band corresponding to the generation of
age, and weighting reception characteristics of the reception audio signal to the receiver for each
band based on the reception parameters determined by the parameter determination means And
correcting means for processing to correct the change in minimum audible limit with the
increase in age.
[0007]
According to the present invention, the parameter determination unit is operated by the
command from the input unit, and the reception parameter of each band corresponding to the
age group is selected and determined from the storage unit based on the age information from
the input unit.
Then, based on the reception parameters determined by the parameter determination means, the
correction means performs a weighting process for each band to correct the change in the
minimum audible limit with the increase in age.
Therefore, it is possible to easily correct the frequency characteristics and level of the sound
output from the receiver or the like in accordance with the age-related auditory change by the
simple operation of the user.
[0008]
The present invention relates to a wireless unit performing wireless communication with a base
station or the like, a receiver / transmitter microphone, a wireless channel connection with a base
station etc., switching of a speech channel, between a wireless unit and a receiver / microphone
A mobile device having a voice correction function that has a control unit that performs voice
signal processing and the like, and that corrects the frequency characteristic and level of the
voice output from the receiver by the control unit in accordance with the deterioration of hearing
ability by the user's age group. And the control unit divides the audio frequency range of the
reception audio signal to the receiver into a plurality of bands using a bulk scale created based
on a critical bandwidth of hearing in psychoacoustics. Means and for each of the bands divided
by the frequency band dividing means, the sound of a change in the minimum audible limit at
which the sound can not be heard as the user's age increases can be heard for each band Storage
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means for storing a weighting function for correction to a range as a reception parameter for
each generation of the user, an input means for inputting age information of the user, and the
storage means based on the age information input from the input means Parameter selection
means for selecting and determining reception parameters of each band corresponding to the
generation of age, reception characteristics of the reception speech signal to the receiver for each
band based on the reception parameters determined by the parameter determination means And
correction means for performing weighting processing to correct a change in minimum audibility
as the age increases.
[0009]
According to the present invention, the control unit is set to the age correction mode according
to a command from the input means to operate the parameter determination means, and
reception of each band corresponding to the age group from the storage means based on age
information from the input means Select and decide parameters.
Then, the correction means performs weighting processing for each band on the basis of the
reception parameter determined by the parameter determination means, and corrects the change
of the minimum audible limit with the increase of the age. Therefore, the user can easily correct
the frequency characteristics and level of the sound output from the receiver in accordance with
age-related auditory changes by simple operation of the user.
[0010]
DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing the
configuration of a portable telephone equipped with the voice correction function of the present
invention, and FIG. 2 is a functional block diagram showing the configuration of a voice
correction apparatus according to the present invention. In FIG. 1, the mobile phone controls the
entire mobile phone and communicates with a CPU (central control unit) 1 that performs various
arithmetic processing related to a call and processing related to voice correction, and a base
station (not shown). The wireless unit 2 is connected to the CPU 1, the operation unit (input unit)
3 including a keyboard and the like, and the CPU 1 is connected to the display unit 4 including
the LCD and the CPU 1 and the wireless unit 2. A processing function that corrects frequency
characteristics and levels according to age-related auditory changes, transmission cancellation
processing according to the correction of received signals, radio connection with a base station,
etc., switching of speech channels, radio unit and receiver, Connected to DSP (digital signal
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processor) 5 that performs audio signal processing etc. between microphones, and CPU 1 and
DSP 5 to change received signal characteristics Memory (storage means) 6 for storing data such
as transmission parameters used for reception parameters and noise canceller / echo canceller
and calculation results in CPU 1 and DSP 5 to convert voice data from DSP 5 into analog signals
To the A / D / D / A converter 7 which converts the audio signal from the microphone 9 into a
digital signal and outputs it to the DSP 5 and to the A / D / D / A converter 7. It has a
microphone amplifier 8 connected to amplify the audio signal from the microphone 9, and a
receiver amplifier 10 connected to the A / D / D / A converter 7 to amplify the analog converted
audio signal and output it to the receiver 11. ing. The CPU 1 and the DSP 5 constitute a control
unit described in the claims.
[0011]
Next, the configuration of the DSP 5 will be described with reference to FIG. In FIG. 2, the DSP 5
includes a BPF (band pass filter: frequency band division means) 51 operating under the control
of the CPU 1, a parameter determination means 52, a correction means 53, and a cancellation
means 54. The BPF 51 divides the audio frequency range of the reception voice signal to the
receiver 11 into a plurality of bands using a bulk scale created based on the critical bandwidth of
hearing in psychoacoustics. For example, as shown in FIG. 6, the operating frequency range of
300 Hz to 3700 Hz, which is the audio frequency range of the speech signal, is calculated using
15 scales based on the critical bandwidth of hearing used in psychoacoustics. It is divided into
bands, and 3 to 17 bulks are artificially configured out of the 0 to 24 bulk critical bands
possessed by hearing. Thus, for each band divided by the BPF 51, a weighting function is used to
correct the change in the minimum audibility limit in which the sound can not be heard as the
user's age increases for each band to the audible area where the sound is audible As shown in
FIG. 7, for example, as shown in FIG. 7, the reception parameters are stored in the memory 6 by
being divided into thirties, forties, forties, forties and forties. Here, the weighting function as the
reception parameter is such that, for example, the minimum audible limit is approximately zero
for the critical bandwidths of 2700 Hz and 3150 Hz corresponding to the bulks 15 and 16 in the
forties. It is.
[0012]
Further, the memory 6 stores transmission parameters. The transmission parameter is a
parameter for noise and echo cancellation that prevents noise and interference with transmission
of the reception signal, and changes in accordance with the correction to the reception voice
signal by the reception parameter, and the division It is set according to the generation of the
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user corresponding to each of the designated bands. The parameter determination means 52 is
operated by setting the CPU 1 to the age correction mode according to a command input from
the operation unit 3, and corresponds to the age from the memory 6 based on the age
information input from the operation unit 3. The reception parameters of each generation band
are selected and determined. Furthermore, the parameter determination means 52 selects and
determines the transmission parameter of each band of the generation corresponding to the age
from the memory 6 based on the age information input from the operation unit 3.
[0013]
The correction means 53 performs weight processing on the reception characteristics of the
reception voice signal to the receiver 11 for each band based on the reception parameters
determined by the parameter determination means 52, and changes the minimum audible limit
with the increase in age. Correct to the audible range where you can hear In addition, the
cancellation means 54 performs processing to reduce noise and echo from being introduced into
transmission (transmission) based on the transmission parameters determined by the parameter
determination means 52.
[0014]
Next, the operation of speech correction based on age in the present embodiment will be
described with reference to FIGS. 3 to 5. FIG. 3 is a flowchart showing an operation procedure in
the case where the mobile phone in the standby state is shifted to the age correction mode and
the standby state after the age correction. In step S1 shown in FIG. 3, it is determined whether or
not a command for age correction has been input by pressing a specific key on the operation unit
3 of the cellular phone in the standby state (step S2). Here, when there is no command input, the
reception parameters and transmission parameters already determined are held (step S3). If
there is a command input, a processing routine for selecting and determining reception
parameters and transmission parameters for the age of the user who uses the mobile phone is
executed (step S4). After the process of step S4 is completed, the mobile phone shifts to the
standby state again (step S5) and ends.
[0015]
Next, the operation of the processing routine for selecting and determining reception parameters
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and transmission parameters will be described with reference to FIG. In FIG. 4, when the user
presses a specific key on the operation unit 3 from the command input waiting state (step S11)
of the mobile telephone (step S12), the correction command of the received voice is input, and
the age correction mode is entered. It transfers (step S13). Next, the user of the mobile phone
inputs his / her age from the operation unit 3 (step S14). The CPU 1 having received the age
information performs generation determination on the input age, and classifies the input age into
generations (step S15). Subsequently, the parameter determination means 52 searches the
reception parameter data stored in advance in the memory 6 based on the classified generational
information (step S16), and receives the reception parameter of the age closest to the inputted
age. The selected and determined reception parameters are stored in the memory 6 (step S18).
[0016]
Next, the parameter determination means 52 selects and determines the transmission parameter
of each band of the generation corresponding to the age from the memory 6 (step S19), and
stores the selected and determined transmission parameter in the memory 6 (step S20) . This
transmission parameter is for a noise canceller and an echo canceler that prevents ambient noise
and incoming speech from getting into the outgoing speech, and reduces the influence of the
incoming speech correction by the receiving parameters on the outgoing speech characteristic To
be determined. Then, after the reception parameter and the transmission parameter are
determined by the parameter determination means 52, when the specific key on the operation
unit 3 is pressed (step S21), the age correction mode of the portable telephone is canceled (step
S22) Do. And it transfers to step S5 of the standby state shown in FIG.
[0017]
Next, for a case where a mobile telephone in a standby state after receiving parameters for voice
correction and transmission parameters for noise and echo canceller are determined according to
the user's age, a calling or receiving operation is performed. This will be described with reference
to FIG. When the mobile telephone is in a standby state (step S31), when the mobile telephone
performs a calling operation or an incoming call operation (step S32), the mobile telephone shifts
to a call state (step S33). When the mobile telephone shifts to a call state and the user is talking,
the receiver means in the DSP 5 performs weighting processing of the reception signal using the
reception parameter determined in the age correction mode processing (step S34) ), Correction is
made according to the age of the user. That is, based on the reception parameter, the reception
characteristics are changed by performing weighting processing such as emphasizing or
reducing a certain frequency band, and the change of the minimum audible limit with the
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increase of the age is corrected to the audible range where the sound is audible. . The weighted
speech signal for reception is converted from a digital signal to an analog signal by the A / D / D
/ A converter 7, amplified by the receiver amplifier 10, and then output from the receiver 11 as
speech. At this time, the reception voice output from the receiver 11 is corrected to an audible
range where the minimum audible limit depending on the user's age can be heard, making it
clear and easy to hear.
[0018]
Also, the cancellation means 54 performs transmission cancellation processing of noise
cancellation and echo cancellation using the transmission parameters determined in the age
correction mode processing (step S35), whereby ambient noise and reception voice are
transmitted speech. Prevent you from getting stuck. Then, the mobile phone ends the call (step
S36), whereby the mobile phone shifts to the standby state (step S37).
[0019]
Although the above embodiment has described the case where the feature correction function of
the present invention is applied to mobile radio equipment such as PHS and mobile phones, the
present invention is not limited to this, and it is possible to use audio such as television and
stereo The present invention can be used for an apparatus, thereby making it possible to correct,
with a simple operation, a change in hearing due to age with respect to the sound output from
the speaker of the audio apparatus, and can improve the clarity of conversation, music and the
like.
[0020]
As described above, according to the voice correction apparatus and the voice correction mobile
apparatus of the present invention, the user can change the frequency characteristics and level of
voice output from the receiver by age with simple operation of the user. It can be easily corrected
according to
As a result, it is possible to make the received voice clear and to be suitable for the reception of
middle-aged and elderly people whose hearing loss is large.
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