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DESCRIPTION JP2007235809

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DESCRIPTION JP2007235809
An information processing terminal capable of suppressing the difference in hearing between
earphones by controlling an output signal and outputting high quality sound information by each
earphone. SOLUTION: A microphone unit collecting sound from the outside, an earphone
connection unit which can be connected to an earphone and outputs reproduced sound through
the earphone, and input / output to an earphone connected to the microphone unit or the
earphone connection unit An information processing terminal including signal processing means
for performing signal processing of sound information to be picked up, the microphone unit
collecting the output sound from the earphone, and based on the collected sound information
The correction value setting means for calculating and storing the correction value of the output
sound of the speaker, the sound information processing means corrects the output sound based
on the stored correction value, and the earphone connected to the earphone connection portion
It has a function to output via. [Selected figure] Figure 1
Information processing terminal, earphone output control method and program
[0001]
The present invention relates to an information processing terminal, and more particularly to an
information processing terminal equipped with a microphone unit and having a function of
correcting the output of sound information from an earphone or the like.
[0002]
Conventionally, mobile phones are mainly used for telephone calls at the main body receiver,
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hands-free function using a speaker, video phone function, and ringer tone reproduction.
On the other hand, in recent years, with the expansion of content such as music and video
distribution, a model having a music reproduction function such as a music player has become
widespread, and applications such as listening to music while moving have become widespread.
For this reason, the use scene which connects and uses an earphone and a headphone is
increasing. In addition, from the regulations at the time of car driving, the scene which uses the
earphone microphone is increasing similarly.
[0003]
From such a thing, in recent years, the opportunity to connect and use an earphone to a mobile
telephone increases, and in connection with this, the sound quality improvement at the time of
use of earphones, headphones, etc. is also strongly called for.
[0004]
JP, 2002-135898, A
[0005]
However, the earphones and headphones attached to the mobile phone may differ depending on
the user, and the volume and sound quality in this case differ depending on the earphones and
headphones used, so some earphones hear a good quality sound. It becomes difficult.
In addition, stereo earphones may cause differences in the sound of left and right.
Furthermore, there is a problem that actual sound pressure adjustment is difficult because the
sound pressure sensitivity is different for each earphone.
[0006]
In addition, if the user listens to the ear and adjusts and uses it, and even if correction is
performed using a correction value corresponding to an earphone etc. assumed to some extent,
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the correction parameter is determined for each assumed earphone It is necessary and difficult to
determine such parameters. Furthermore, it is also difficult to adjust the maximum volume.
[0007]
As described above, in the conventional example, in a scene using earphones or headphones,
there is a big problem in eliminating the difference between the volume and the sound quality
and providing a high quality sound quality. Incidentally, Patent Document 1 discloses a system in
which a microphone is attached to a headphone, and based on the output of the microphone, a
filter adjustment is performed so that the sound image localization control effect is not affected
by the headphone wearing state. This is a technology for performing sound image localization
control, and since it is necessary to prepare a separate microphone, it is difficult for the user to
adjust the earphones individually in the above-described mobile phone and the like.
[0008]
For this reason, in the present invention, the disadvantages of the above-described conventional
example are improved, and in particular, by controlling the output signal, the difference in
hearing between the earphones is suppressed, and high-quality sound information is output by
each earphone. The purpose is to provide an information processing terminal capable of
[0009]
Therefore, in the information processing terminal according to one embodiment of the present
invention, a microphone unit that collects sound from the outside, an earphone connection unit
that can be connected to an earphone and outputs reproduced sound via the earphone, a
microphone unit or an earphone connection unit An information processing terminal including a
sound information processing unit that performs signal processing of sound information input to
and output from an earphone connected to the microphone; the microphone unit collects sound
output from the earphone; A correction value setting means for calculating and storing a
correction value of the output sound from the earphone based on the collected sound
information is provided, and the sound information processing means corrects the output sound
based on the stored correction value. , And a function of outputting via an earphone connected to
the earphone connection portion.
[0010]
And storage means for storing correction reference sound data set in advance and correction
value setting reference data set in advance corresponding to the correction reference sound data.
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The correction value reference sound data is output through the connected earphone, and the
output sound from the earphone is collected by the microphone unit, compared with the
correction value setting reference data, and the correction value is calculated based on the
comparison result. It is characterized by having a calculation function.
[0011]
Further, the correction value setting means is characterized in that the correction value is
calculated based on the difference between the output sound from the earphone and the
correction value setting reference data.
[0012]
According to the invention, first, the user brings the earphone connected to the information
processing terminal close to the microphone unit, and inputs the output sound from the
earphone from the microphone unit.
Then, the information processing terminal calculates and stores the correction value of the sound
output from the earphone based on the sound information input from the earphone.
Specifically, the correction reference sound data set in advance is output from the earphone,
collected by the microphone, and compared with the correction value setting reference data set
in advance.
Then, the correction value at the time of output is calculated and stored based on these
differences and the like.
Thus, at the time of output from the earphone after the correction value is set, the output sound
is corrected based on the stored correction value and output. As a result, since the correction is
automatically performed according to the earphone characteristic and the sound information is
output, it is possible to output the sound information of constant quality regardless of the
characteristic of the earphone. As a result, there is no need for the user to make special settings,
and the convenience and satisfaction of the user can be improved.
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[0013]
In addition, the correction value setting means has a function to separate stereo signals
outputted from the L side and R side of the earphone, collect the sound by the microphone unit,
and calculate and store the correction values for the L side and R side, respectively. The sound
information processing means has a function of correcting and outputting the output sound from
the L side and R side of the earphone based on the stored correction values.
[0014]
As a result, the difference in sound quality between the left and right of the earphones can be
corrected, and the convenience and satisfaction of the user can be further improved.
[0015]
Further, the microphone unit is characterized in that an earphone arrangement portion capable
of arranging the output portion of the earphone is provided.
Alternatively, it is characterized in that a connecting jig is provided for connecting the
microphone unit and the output portion of the earphone so that the output sound from the
earphone passes through the microphone unit.
The connecting jig is characterized in that it is detachable from the microphone unit and the
earphone.
[0016]
As a result, the output sound from the earphone can be more accurately input to the microphone
unit, an appropriate correction value can be calculated by the earphone characteristic, and the
correction effect can be improved.
[0017]
The information processing terminal described above has a high possibility of using an earphone,
and is preferably a mobile phone having a microphone unit.
[0018]
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Further, a program according to another aspect of the present invention is an information
processing terminal comprising: a microphone unit for collecting sound from the outside; and an
earphone connection unit capable of connecting an earphone and outputting reproduced sound
through the earphone. Correction value setting means for collecting the output sound from the
earphone by the microphone unit and calculating and storing the correction value of the output
sound from the earphone based on the collected sound information; microphone unit or
earphone connection unit Performs signal processing of sound information input to and output
from the earphone connected to the input sound, and corrects output sound based on the stored
correction value and outputs the sound via the earphone connected to the earphone connection
unit And a program for realizing the information processing means.
[0019]
Then, the program stores the correction reference sound data set in advance and the correction
value setting reference data set in advance corresponding to the correction reference sound data
in the storage means of the information processing terminal. The correction value setting means
outputs the correction value reference sound data through the earphone connected to the
earphone connection unit, and collects the output sound from the earphone with the microphone
unit to obtain the correction value setting reference data and the like. It is characterized in that it
has a function of comparing and calculating a correction value based on the comparison result.
[0020]
Further, according to another embodiment of the present invention, an earphone output control
method includes: a microphone unit that collects sound from the outside; an earphone
connection unit that can be connected to an earphone and outputs reproduced sound via the
earphone; And a sound information processing unit that performs signal processing of sound
information input to and output from an earphone connected to the connection unit. Collecting
the output sound from the earphones, calculating the correction value of the output sound from
the earphone based on the collected sound information and storing the correction value, and
outputting based on the stored correction value And a correction output step of correcting the
sound and outputting it through the earphone connected to the earphone connection unit.
[0021]
The storage means of the information processing terminal stores correction reference sound data
set in advance and correction value setting reference data set in advance corresponding to the
correction reference sound data. While outputting the correction value reference sound data
through the earphone connected to the earphone connection unit, the output sound from the
earphone is collected by the microphone unit and compared with the correction value setting
reference data, and the comparison result Is a program for calculating the correction value based
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on
[0022]
Furthermore, in the connecting jig according to another aspect of the present invention, an
output portion of the microphone unit and the earphone such that an output sound from an
earphone connected to the information processing terminal passes through the microphone unit
of the portable information processing terminal. And connecting.
That is, this connection part is used for the above-mentioned information processing terminal,
and is detachably configured to the microphone part and the earphone.
[0023]
Even the invention of the program, the method, and the connecting jig of the configuration
described above functions in the same manner as the information processing terminal described
above, and therefore the object of the present invention described above can be achieved.
[0024]
Since the present invention is configured and functions as described above, according to this,
since correction is automatically made according to the earphone characteristic and sound
information is output, a certain quality is not affected by the earphone characteristic. The sound
information can be output, and as a result, the user does not have to make special settings, and
the convenience and satisfaction of the user can be improved.
[0025]
The present invention acquires the output signal characteristics possessed by the earphones
using the microphones provided in the terminals themselves for each earphone used in the
information processing terminal, and corrects the characteristics to be preset according to the
characteristics. , And control to output.
In the following embodiment, a mobile phone will be described as an example of the information
processing terminal, but a portable audio terminal or PDA, which can be connected to an
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earphone and has a reproduction function of sound information and is provided with a
microphone unit, May be another information processing terminal such as a general personal
computer.
[0026]
A first embodiment of the present invention will be described with reference to FIGS.
FIG. 1 and FIG. 2 are views showing the appearance of the mobile phone in the present
embodiment.
FIG. 3 is a block diagram showing the configuration of the mobile phone.
FIG. 4 is a diagram showing an example of processing data.
FIG. 5 is a flowchart showing the operation of the mobile phone.
[0027]
[Configuration] A mobile phone 10 in the present invention is a foldable mobile phone provided
with an upper case 1 and a lower case 2 and FIG. 1 shows a state when it is opened.
The upper case 1 is formed with a display unit 3 such as a display and a receiving sound hole 1a
to be a speaker.
Further, the lower case 2 is formed by incorporating the operation unit 4 such as a keyboard and
the like, and a microphone unit for collecting sound from the outside is mounted, and the
transmission sound hole 2a forming the microphone unit is formed. ing. Further, as shown in FIG.
2, around the sound transmission hole 2a, there is formed a recess 5 (earphone placement
portion) to which the earphone portion 6 (output part of the earpiece) can be fitted. Furthermore,
an elastic member such as a cushion or rubber is mounted on the outer periphery of the recess 5
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so that the earphone 6 can be in close contact with the recess 5. For example, by covering the
outer periphery of the recess 5 with an elastic member (connection jig), the earphone unit 6 and
the transmission sound hole are made to pass the output sound from the earphone unit 6 to the
transmission sound hole 2a. 2a is linked.
[0028]
Further, on the side surface of the lower case 2 of the mobile phone 10, an earphone connection
portion (not shown) which can be connected to the earphone 60 and outputs reproduced sound
via the earphone 60 is formed. And in FIG. 1, the mode when the earphone 60 is connected is
shown. The earphone 60 is a stereo earphone with a microphone, and the tip of the cord is
equipped with an earphone part 6 to be attached to the user's ear, and a sound hole 7a which is a
microphone part on the earphone side is formed in the middle of the cord. It is done. By using
the earphone 60, the user can listen to the music reproduced from the mobile phone 1, and can
make a hands-free call or the like using the microphone unit.
[0029]
The earphone in the present invention includes all the ones in which the output portion of the
reproduction sound is worn on the user's ear, and includes the one in the form of headphones
worn on the head.
[0030]
Next, the internal structure of the mobile phone 10 will be described with reference to FIG.
As shown in the circuit block diagram of FIG. 3, the mobile phone 10 includes a CPU 21, a DSP
22, a memory 23, an EQ parameter setting unit 24, an A / D / D / A converter 25, and an
earphone amplifier 26. The microphone amplifier 27 is provided. Each component will be
described in detail below.
[0031]
The CPU 21 controls the entire operation of the mobile phone 10 and performs processing /
instructions related to various arithmetic processing related to telephone calls / communications,
and instructs to switch the volume such as ringing tone / voice / transmission sensitivity etc.
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Have the function of performing
[0032]
The display unit 3 is connected to the CPU 21 and displays a selection screen at the time of
function setting, a setting state of the function, an image photographed by a camera or the like, a
moving image, an image at the time of videophone, and the like.
The operation unit 4 is connected to the CPU 21 and operated by the user for calling, call start /
end, key input when selecting a menu, and the like.
[0033]
The DSP 22 is connected to the CPU 21 and performs audio signal processing in the receiver /
receiver unit, signal processing of sound information of melody data such as ringing tone, and
the like. That is, it functions as a sound information processing unit that performs signal
processing of sound information to be input / output to / from the receiving sound hole 1a, the
transmitting sound hole 2a, and the earphone 60. Further, as described later, the DSP 22 has a
function of correcting the output sound from the earphone 60 based on the EQ parameter value
set by the EQ parameter setting unit 24 and outputting the sound via the earphone 60, that is, It
has an equalizer function.
[0034]
The memory 23 (storage means) is connected to the CPU 21 and the DSP 22 and stores the
processed state, data such as an image photographed by a camera, a moving picture and various
function setting states as a result of calculation by the CPU 21. In particular, as described later,
correction reference sound data set in advance from the earphone to set the EQ parameter, and
correction value setting reference data set corresponding to the correction reference sound data.
Is stored. Here, the correction reference sound data output from the earphone 60 at the time of
setting the EQ parameter is, for example, a sweep digital signal of a sine wave of a use frequency
band output at a constant level. Moreover, the correction value setting reference data
corresponding to this is threshold value data which becomes a flat frequency characteristic, for
example, data shown in the diagram B of FIG. 4A.
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[0035]
The EQ parameter setting unit 24 is connected to the CPU 21 and the DSP 22 and receives an
instruction issued according to the setting state based on the information obtained from the DSP
22 by the CPU 21 and performs EQ parameter setting. Specifically, when the EQ parameter
setting instruction is received, the correction value reference sound data stored in advance in the
memory 23 is output to the earphone 60, and the output sound from the earphone unit 6 is
transmitted from the transmission sound hole 2a. The sound is collected, and the collected sound
information is compared with the correction value setting reference data (threshold data) stored
in the memory 23. Then, as a result of the comparison, the correction value which is the EQ
parameter setting value is calculated from the difference and stored in the memory 23, whereby
the setting is completed. Here, for example, the sound information collected from the earphone
unit 6 is data as shown by the diagram A in FIG. 4A, and this and the diagram B as the correction
value setting reference data (threshold data). And the difference between Then, the difference is
set as an EQ parameter setting value (correction value), and for example, data as shown in the
diagram C of FIG. 4B is set. Then, when the reproduction signal is corrected using the above EQ
parameter setting value, when being reproduced by the above-mentioned CPU 21, it is adjusted
from the earphone unit 6 as shown by the diagram D in FIG. The playback sound is output in a
steady state.
[0036]
The A / D / D / A converter 25 is connected to the DSP 22 and the EQ parameter setting unit 24,
and converts digital signals such as voice and music output from the DSP 23 or passed through
the EQ parameter setting unit 24 into analog signals. Do. Also, conversely, an analog signal such
as voice or music collected by the transmission sound hole 2a is converted into a digital signal.
The earphone amplifier 26 is connected to the earphone 60 and used to amplify signals such as
voice and music. The microphone amplifier 27 is connected to a microphone unit which is the
transmission sound hole 2a, and is used to amplify a signal such as voice or music collected by
the microphone unit.
[0037]
Here, in the present embodiment, since the earphones 60 are stereo earphones, adjustment is
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performed for each of the left and right sides (L side, R side) of the earphone unit 6 when setting
the EQ parameter. Therefore, the EQ parameter setting unit 24 distinguishes between setting the
EQ parameters for the L side earphone section 6 and setting the EQ parameters for the R side
earphone section 6 from each earphone section 6 to the transmission sound hole 2a. The sound
is collected, and each EQ parameter setting value is calculated and stored. Further, along with
this, the CPU 21 corrects and outputs the output sound to each earphone unit 6 using the
calculated L parameter or R parameter EQ setting value at the time of reproduction from the
earphone 60. Have. Thereby, in the case of a stereo earphone, it can reproduce | regenerate with
the same volume and sound quality by right and left.
[0038]
The function of the CPU 21 described above and the function of the EQ parameter setting unit 24
are realized by program control. That is, by incorporating such a program into the mobile phone,
the mobile phone 10 capable of realizing the above-described earphone output control can be
configured.
[0039]
[Operation] Next, the operation of the mobile phone 10 configured as described above will be
described with reference to the flowchart of FIG. First, when the mobile phone 10 is in the
standby state (step S1), in the case of adjusting the signal output from the earphone unit 6 of the
stereo earphone 60 with a microphone inserted in the mobile phone 10, the user The menu of
the telephone 10 is operated to select the earphone correction function (step S2). Then, the user
presses one of the (for example, L side) earphones 6 to the transmission sound hole 2 a of the
mobile phone 10 as shown in FIG. At this time, since the concave portion 5 is formed around the
transmission sound hole 2a or an elastic member is equipped, the earphone portion 6 can be
closely attached to the transmission sound hole 2a. The output sound from can be collected
properly.
[0040]
Subsequently, in order to determine the correction value, the correction value adjustment in the
menu is selected (Yes in step S3). Then, a sweep digital signal of a sine wave of the working
frequency band is output from the DSP 22 at a constant level, and at the same time, the
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transmission sound hole 2a is set to be able to collect sound. Then, the output signal is converted
from a digital signal to an analog signal through the D / A converter 25, and the converted
analog signal is amplified by the earphone amplifier 26, matched with the earphone
characteristics, and sent out from the earphone unit 6. (Step S4).
[0041]
Subsequently, the signal transmitted from the earphone unit 6 in accordance with the earphone
characteristic is collected from the transmission sound hole 2a, amplified through the
microphone amplifier 27, and amplified through the A / D converter 25 and digitalized to the
DSP 22. A signal is collected as sound pressure for each frequency (step S5). This signal is shown,
for example, in diagram A of FIG. 4 (a).
[0042]
Subsequently, the CPU 21 creates an EQ parameter setting value based on the collected data and
the threshold data (see the diagram B of FIG. 4A) having flat frequency characteristics set in
advance. The creation instruction is issued to the EQ parameter setting unit 24 (Yes in step S6).
Then, the EQ parameter setting unit 24 creates an EQ parameter value from the difference
between the collected data and the threshold data as a result of comparison (step S7). Thereafter,
when the creation of the EQ parameter value is completed, the CPU 21 recognizes it, holds the
EQ parameter value created by the EQ parameter setting unit 24 in the memory 23, and
completes the setting (step S8, correction value setting step). In addition, the created EQ
parameter setting value is, for example, as shown in the diagram C of FIG.
[0043]
Then, although one setting (L side) of the earphone unit 6 is performed in the above,
subsequently, the other (R side) is pressed against the transmission sound hole 2a, and EQ
parameter values are set in the same manner as above. Save the EQ parameter settings for the
side and the R side.
[0044]
Thereafter, in a state where the earphone adjustment function is selected, when the music
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reproduction operation is performed via the earphone 60, the CPU 21 instructs to reproduce
using the EQ parameter value held by the EQ parameter setting unit 24. .
Then, the DSP 22 adjusts the output signal from the earphone unit 6 using the EQ parameter
value, and reproduces and outputs it from the earphone unit 6 in a controlled state, for example,
as illustrated in FIG. Correction output process).
[0045]
As described above, when using the earphone with functions such as music reproduction and
communication in the mobile phone 10, it is necessary to adjust in advance using the
microphone provided in the mobile phone 10 in accordance with the characteristics of the
earphone used. Since the output signal is controlled and the music and voice outputted from the
earphones are adjusted for each earphone or for each left and right, it is possible to output sound
with less change in volume and sound quality. Therefore, in the case of a difference in sound due
to the difference in earphones or in the case of stereo, the difference between right and left is
suppressed, and it is possible to provide as constant voice and music as possible. In particular, in
the case of a 3D sound source, a remarkable effect is obtained.
[0046]
Also, howling can be prevented by playing back certain voices and music. Furthermore, it is
possible to avoid the risk of transmitting the maximum sound pressure by correcting the sound
pressure to be output from the earphones and reproducing certain sounds and music for each of
the used earphones.
[0047]
Next, a second embodiment of the present invention will be described with reference to FIG. As
shown in FIG. 6, in the present embodiment, a connecting jig 8 used when attaching the
earphone section 6 to the transmission sound hole 2a of the mobile phone 10 is provided. The
connection jig 8 is formed of a cushion, rubber, or the like, similarly to the elastic member
described above, and is formed in an annular shape covering the periphery of the transmission
sound hole 2a.
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[0048]
As a result, the earphone unit 6 and the transmission sound hole 2a communicate with each
other, and the surrounding area is covered so that the output sound from the earphone unit 6
does not leak to the outside. The correction value can be calculated according to the earphone
characteristic, and the correction effect can be improved.
[0049]
In the above, the earphone has been described, but the same is true for headphones used over
the head.
Also in this case, the correction value can be set in the same manner as described above by
pressing the output portion which is the earpiece portion of the headphone against the
microphone portion which is the transmission sound hole 2a of the mobile phone 10. In the case
of headphones, since the size of the ear pad portion and the microphone portion of the mobile
phone are different, the connection jig 8 is formed so as to be able to absorb the difference in
shape using the connection jig 8 described above. Good to do. For example, by forming the
connecting jig 8 in a conical shape, the output sound from the headphones can be more
accurately collected by the microphone unit.
[0050]
The present invention can be used for information processing terminals such as mobile phones
that can play music and can be listened to using earphones, and has industrial applicability.
[0051]
FIG. 1 is a view showing an appearance of a mobile phone in a first embodiment.
It is a figure which shows a mode at the time of use of a mobile telephone. It is a block diagram
which shows the structure of a mobile telephone. FIGS. 4A and 4B illustrate examples of data
processed by the mobile phone. It is a flowchart which shows operation | movement of a mobile
telephone. FIG. 7 is a diagram showing a state of using a mobile phone in a second embodiment.
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Explanation of sign
[0052]
DESCRIPTION OF SYMBOLS 1 upper cover 2 lower cover 3 display part 4 operation part 5
recessed part 6 earphone part 8 connection member 10 mobile phone 21 CPU 22 DSP 23
memory 24 EQ parameter setting part 25 A / D / D / A converter 26 earphone amplifier 27 for
microphone Amplifier 60 Earphone 1a Reception sound hole 2a Transmission sound hole
(microphone part)
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