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JP2007096734

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DESCRIPTION JP2007096734
To provide a communication terminal device capable of accurately reproducing sound data in
which a producer's intention is reflected. When setting sound data as a ringing tone, the portable
telephone 100 according to the present embodiment allows the sound data to be output from the
speaker based on the reproduction characteristic data, the loud sound characteristic data and the
resonance characteristic data stored in advance. Adjustment of frequency characteristics when
reproducing the sound data as a ringing tone based on the calculated frequency characteristics
and the acquired frequency characteristics inherent to the sound characteristics, that is, the
equalizer function The setting of the signal level for each frequency band set in advance is
performed using. [Selected figure] Figure 2
Communication terminal
[0001]
The present invention belongs to the field of a communication terminal device having a function
of reproducing sound data.
[0002]
2. Description of the Related Art In recent years, with the development of peripheral technologies
such as wireless communication technology and downsizing of various circuit elements and
display devices, communication terminal apparatuses such as portable telephones are rapidly
spreading.
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1
In addition, with the spread of communication terminal devices, various functions in sound data
are used such as using the communication terminal device as a sound data reproduction device
or expanding the sound data as a ringing tone when used as a telephone. Expanded
communication terminals are also beginning to spread.
[0003]
On the other hand, in a communication terminal apparatus having a call function, it is known to
perform an effect process such as an equalizer to adjust the sound quality of sound data when
the sound data of the received sound is amplified (for example, Patent Document 1) ). JP 200251110 A
[0004]
However, in the case where the communication terminal apparatus having the above-described
call function is applied when the sound data such as the ringing tone is amplified, the effect
processing is performed at the time of reproduction of the sound data. The sound data such as a
change or deterioration of the sound quality due to reproduction characteristics of the means,
loud-speaking characteristics when loud-speaking from a speaker, or inherent resonance
characteristics of the communication terminal apparatus, etc. May be
[0005]
An object of the present invention is to provide a communication terminal device capable of
accurately reproducing sound data in which the intention of a creator is reflected, as one
example of the above-mentioned problem.
[0006]
In order to solve the above-mentioned problems, the invention according to claim 1 is a
communication terminal apparatus for expanding sound data, which is an acquisition unit for
acquiring the sound data from a server apparatus via a communication line, and the acquisition
The acquired sound data is amplified based on the reproduction control means for reproducing
the generated sound data and causing the sound expansion means to amplify the sound data, and
the characteristic data in the frequency characteristics related to reproduction and sound
expansion when the sound data is amplified from the sound expansion means. Calculation means
for calculating by simulating the frequency characteristic at the time of comparison, comparison
means for comparing the calculated frequency characteristic and the frequency characteristic in
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2
the acquired sound data, and a sound signal by reproducing the acquired sound data Adjusting
means for adjusting the frequency characteristic of the sound data to be amplified based on the
comparison result of the comparison means when The has.
[0007]
With this configuration, when reproducing the sound data, the invention according to claim 1
calculates the frequency calculated based on the characteristic data in the reproduction and the
frequency characteristics related to the sound expansion when the sound data is amplified by the
loudspeaker. The characteristics are compared with the frequency characteristics of the acquired
sound data, and the frequency characteristics of the sound data to be amplified are adjusted
based on the comparison result.
[0008]
Therefore, according to the first aspect of the present invention, the sound data is generated by
the reproduction characteristic of the reproduction means when the sound data is reproduced,
the sound amplification characteristic of the loudspeaker such as the speaker, or the resonance
characteristic of the casing of the communication terminal itself. Even if there is a change or
deterioration in sound quality, it is possible to adjust the sound data to be amplified to match the
frequency characteristics of the acquired sound data, so the sound data is produced. Sound data
reflecting the intention of the producer to be provided can be accurately reproduced.
[0009]
Also, the invention according to claim 2 is the reproduction characteristic data indicating the
characteristic when the sound data is reproduced as the characteristic data, the sound calculation
characteristic data indicating the characteristic in the sound amplification unit, or the sound
characteristic data. Based on at least one of resonance characteristic data indicating resonance
characteristics of a casing in the communication terminal when the data is amplified, simulating a
frequency characteristic when the acquired sound data is amplified It has a configuration to
calculate.
[0010]
With this configuration, the invention according to claim 2 calculates the frequency
characteristic when the acquired sound data is loudened based on at least one of the
reproduction characteristic data, the loud sound characteristic data, and the resonance
characteristic data. .
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[0011]
Therefore, according to the second aspect of the present invention, the sound data is generated
by the reproduction characteristic of the reproduction means when the sound data is reproduced,
the sound amplification characteristic of the loudspeaker such as the speaker, or the resonance
characteristic of the casing of the communication terminal itself. Even if there is a change or
deterioration in sound quality, it is possible to adjust the sound signal to be amplified to match
the frequency characteristic of the acquired sound data, so the sound data is produced. Sound
data reflecting the intention of the producer to be provided can be accurately reproduced.
[0012]
The invention according to claim 3 is the communication terminal apparatus according to claim 1
or 2, further comprising storage means in which the characteristic data is stored in advance.
[0013]
According to this configuration, the invention according to claim 3 calculates the frequency
characteristic when the sound data acquired is amplified based on the characteristic data stored
in advance, so that the frequency characteristic is calculated easily and accurately. be able to.
[0014]
The invention according to claim 4 is the communication terminal apparatus according to any
one of claims 1 to 3, wherein the adjusting means is configured to adjust the frequency of the
sound data when the sound data is reproduced. It has a configuration for adjusting the
characteristics.
[0015]
According to this configuration, the invention according to claim 4 adjusts the signal level for
each frequency band with respect to sound data, so that adjustment of the frequency
characteristic is digitally performed on data when sound data is amplified. Can be easily adjusted.
[0016]
Further, in the invention according to claim 5, the reproduction control means reproduces the
acquired sound data and converts it into a sound signal, and the converted sound signal is
amplified from the sound amplification means, and the adjustment means is And adjusting the
frequency characteristic of the sound signal.
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[0017]
With this configuration, the invention according to claim 5 adjusts the frequency characteristic of
the sound signal, so that the signal level can be adjusted in an analog manner on the sound signal
when the sound data is amplified. Adjustments can be made in detail.
[0018]
The invention according to claim 6 is the communication terminal apparatus according to claim 1
or 2, wherein the calculating means acquires and analyzes the loud sound obtained by the sound
raising means by the sound raising means. The characteristic data is calculated, and based on the
calculated characteristic data, calculation is performed by simulating the frequency characteristic
when the acquired sound data is amplified.
[0019]
According to this configuration, the invention according to claim 6 calculates characteristic data
by acquiring and analyzing a loud sound in which sound data is amplified by the loudspeaker,
and is acquired based on the calculated characteristic data. The frequency characteristic when
sound data is amplified is calculated.
[0020]
Therefore, according to the sixth aspect of the present invention, since the frequency
characteristic when the sound data is loudened can be calculated based on the actual sound
amplification situation, the frequency characteristic can be accurately calculated according to the
situation. it can.
[0021]
In the present invention, the change or deterioration of the sound quality of the sound data
occurs due to the reproduction characteristic of the reproduction means when the sound data is
reproduced, the loud sounding characteristic of the speaker or other loudspeaker unit, or the
resonance characteristic of the casing of the communication terminal itself. Even in this case, it is
possible to adjust the sound data to be amplified to match the frequency characteristics of the
acquired sound data, so the intention of the creator who produces and provides the sound data is
Sound data reflected can be reproduced accurately.
[0022]
Next, preferred embodiments of the present invention will be described based on the drawings.
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5
[0023]
The embodiment described below is an embodiment in the case where the communication
terminal device of the present application is applied to a portable telephone having a
reproduction function of sound data such as data for a ringing tone.
[0024]
First, a schematic configuration of the portable telephone according to the present invention will
be described with reference to FIG.
In addition, it is a block diagram which shows the structure of the sound data delivery system to
which the portable telephone of this embodiment belongs.
[0025]
As shown in FIG. 1, the portable telephone 100 of the present embodiment is configured to
constitute a part of the sound data distribution system S of the present embodiment, and the
Internet and the mobile packet communication network are the relay exchange station BS. A
sound data distribution server device (hereinafter, simply referred to as a server device )
connected to the interconnected network N via a fixed location at an arbitrary location.
Sound data is acquired from 10).
[0026]
This portable telephone 100 amplifies sound data set in advance as a ringing tone when calling
with another telephone, or as a ringing tone when communicating with another communication
terminal device such as electronic mail. The sound data can be expanded for viewing purpose,
and the sound data can be acquired from the predetermined server device 10 via the network N.
[0027]
In addition, when the portable telephone 100 issues an instruction to expand sound data, such as
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setting sound data as a ringing tone, the sound characteristic is stored in advance based on the
reproduction characteristic data, the amplification characteristic data, and the resonance
characteristic data. The frequency characteristic when the data is amplified from the speaker is
calculated, that is, the frequency characteristic is simulated, and the sound data is reproduced
based on the calculated frequency characteristic and the original frequency characteristic of the
acquired sound data. The adjustment of the frequency characteristic at the time of setting,
specifically, the setting of the signal level for each frequency band set in advance using the
equalizer function is performed.
[0028]
Next, the configuration of the portable telephone 100 according to the present embodiment will
be described with reference to FIG.
FIG. 2 is a block diagram showing the configuration of the portable telephone 100 in the present
embodiment.
[0029]
As shown in FIG. 2, the portable telephone 100 according to the present embodiment is acquired
from the communication control unit 110 that communicates with another telephone or another
communication terminal device via an antenna (not shown) and a predetermined server device
10. A data storage unit 120 in which the received sound data is stored, a data reproduction unit
130 that reproduces the sound data stored in advance at the time of an incoming call, and
outputs audio data, adjusting frequency characteristics of the output audio data, Sound
processing such as conversion to a sound signal (hereinafter, referred to as DSP (Digital Signal
Processor) processing .
And a speaker for ringing tone amplification (hereinafter referred to as
loudspeaker ).
And the power amplifier 150 for outputting to SP1.
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the ringing tone
[0030]
Further, the portable telephone 100 is used when controlling the system control unit 160 that
controls each unit such as control when reproducing sound data, and when controlling each unit,
and is used when calculating frequency characteristics such as reproduction characteristic data.
Data (hereinafter referred to as "characteristic data".
) Based on the ROM / RAM 170 in which other data are stored in advance and the stored
characteristic data, it is calculated by simulating the frequency characteristic when the sound
data is loudened from the ringing tone speaker SP1. And a frequency characteristic adjustment
control unit 180 which performs adjustment control of the frequency characteristic in the DSP
processing unit 140 based on the calculated frequency characteristic.
[0031]
The portable telephone 100 further includes an operation unit 190 for performing various
operations, a display unit 200 for performing various displays in conjunction with the operation
unit 190, and a display control unit 210 for performing display control of the display unit 200. A
microphone M to which a voice is input when making a call with another telephone, a voice
processing unit 220 processing the input voice into a predetermined signal, and outputting a
reception voice to the reception speaker SP2 during a call And a receiver control unit 230.
[0032]
The communication control unit 110 of the present embodiment constitutes the obtaining means
of the present invention, and the data reproduction unit 130 constitutes the reproduction control
means of the present invention.
Further, the DSP processing unit 140 of the present embodiment constitutes the adjustment
means of the present invention, and the ROM / RAM 170 constitutes the storage means of the
present invention.
Further, the frequency characteristic adjustment control unit 180 of the present embodiment
constitutes the calculating means and the comparing means of the present invention.
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[0033]
Communication control unit 110 is connected to a network N such as a telephone public network
line or the Internet via an antenna (not shown), and other communication such as portable
telephone 100 under the control of system control unit 160. Communication control with the
terminal device or the server device 10 is performed.
[0034]
In particular, the communication control unit 110 according to the present embodiment allows
sound data having a predetermined format such as MIDI (Musical Instrument Digital Interface)
format, SMAF (Synthetic Music Mobile Application Format) or MLD format from the server device
based on an instruction from the operator. Are stored in the data storage unit 120.
[0035]
The data storage unit 120 stores sound data to be loudened at the time of an incoming call
acquired from the server device 10, and in addition to the sound data, a name indicating a name
of an owner of another communication terminal device, a common name, etc. For each name
information, telephone number information indicating a telephone number, information of a mail
address (hereinafter referred to as "address information").
Etc.) are stored.
[0036]
The data reproduction unit 130 reads out sound data which is preset and stored in the data
storage unit 120 under the control of the system control unit 160 when an incoming call is
generated from another telephone set, and is used for ringing sound amplification. Audio data is
generated and output to the DSP processing unit 140 in order to expand from the speaker SP1.
[0037]
Specifically, the data reproduction unit 130 decodes sound data of a predetermined format,
converts the data into control data of a predetermined format, or the control data and sound
source data such as a PCM sound source, and based on the control data, Audio data is generated
and output using various sound source data or decoded sound source data in which a scale, a
timbre, a tempo, and the like are previously defined.
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[0038]
The DSP processing unit 140 mainly includes a central processing unit (CPU), and is configured
to perform various sound processing and other processing on the audio data output from the
data reproduction unit 130.
Specifically, the DSP processing unit 140 performs sound processing such as delay processing
and adjustment processing of frequency characteristics on the audio data output from the data
reproduction unit 130, and converts the digital signal into an analog signal. / Analog (hereinafter
referred to as "D / A".
) The conversion processing is performed, and the analog signal subjected to the D / A
conversion processing is output to the power amplifier 150 as a sound signal.
[0039]
In particular, when adjusting the frequency characteristic of audio data to be amplified, the DSP
processing unit 140 adjusts the signal level for each predetermined frequency band based on the
instruction of the frequency characteristic adjustment control unit 180. It has become.
[0040]
For example, the DSP processing unit 140 according to the present embodiment adjusts the
signal level for each frequency band whose center frequency is each of six bands, that is, 500 Hz,
1 kHz, 2 kHz, 4 kHz, 8 kHz, and 16 kHz as an equalizer function. The signal level value is set
based on 0 dB for each frequency band based on the instruction of the frequency
characteristic adjustment control unit 180, and the sound level is set for each frequency band
when the sound data is to be amplified. The signal is amplified to a signal level and output to the
power amplifier 150.
[0041]
The power amplifier 150 receives a DSP-processed sound signal, and the power amplifier 150 is
controlled by the system control unit 160 based on an instruction of the volume designated by
the operation unit 190. The signal level of the sound signal is amplified, and the amplified sound
signal is output to the ringing sound speaker SP1.
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10
[0042]
In addition to the ringing of the ringing tone, the ringing speaker SP1 is also configured to
perform a ringing on sound data that is to be loudened for viewing purposes.
[0043]
The system control unit 160 mainly includes a central processing unit (CPU) and is connected to
each unit by a bus B so as to control overall functions of the portable telephone 100 as a whole.
There is.
[0044]
Specifically, the system control unit 160 reads out the control program stored in the ROM / RAM
170 and executes each process when controlling the entire operation of the portable telephone
100 such as the call function and the communication function. The data being processed is
temporarily held in the ROM / RAM 170.
[0045]
In particular, when acquiring sound data from the server device 10, the system control unit 160
causes the communication control unit 110 to acquire sound data desired by the operator based
on an instruction from the operation unit 190, and causes the acquisition to be performed. Sound
data is stored in the data storage unit 120.
[0046]
In addition, the system control unit 160 calculates the frequency characteristic when sound data
is amplified from the ringer sound speaker SP1 to the frequency characteristic adjustment
control unit 180 at a predetermined timing such as when acquiring the sound data. At the same
time, adjustment control of the signal level for each predetermined frequency band in the DSP
processing unit 140 is performed.
[0047]
The ROM / RAM 170 is configured to store a control program for performing a predetermined
operation, data temporarily used, and other data.
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In particular, in the present embodiment, the ROM / RAM 170 previously stores characteristic
data used when calculating the frequency characteristic in the frequency characteristic
adjustment control unit 180.
[0048]
Specifically, in the ROM / RAM 170 of the present embodiment, frequency characteristics
(hereinafter referred to as decoding characteristics ) at the time of decoding sound data in
the data reproduction unit 130 as characteristic data, arrangement in the portable telephone
100. The speaker characteristic (hereinafter simply referred to as speaker characteristic ) in
the ringing sound speaker SP1 including the above and the resonance characteristic (hereinafter
simply referred to as resonance characteristic ) in the casing of the portable telephone 100
itself.
Each data of is stored beforehand as characteristic data.
[0049]
The frequency characteristic adjustment control unit 180 acquires the characteristic data stored
in the ROM / RAM 170 at a predetermined timing such as when acquiring the sound data from
the server device 10 or when the sound data is amplified and the like. Based on the characteristic
data, it is calculated by simulating the frequency characteristic when sound data is amplified
from the ringer sound speaker SP1 and the DSP processing unit 140 is performed regarding
adjustment of the frequency characteristic based on the calculated frequency characteristic. Is
supposed to control.
[0050]
Specifically, the frequency characteristic adjustment control unit 180 calculates the frequency
characteristic when sound data to be amplified is actually amplified based on the characteristic
data, and calculates the calculated frequency characteristic and frequency characteristic. The
original frequency characteristics of sound data acquired from the server device 10 used before
being called (hereinafter referred to as "reference frequency characteristics").
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) To compare.
For example, when the frequency characteristic adjustment control unit 180 of the present
embodiment compares the calculated frequency characteristic with the reference frequency
characteristic, the DSP processing unit 140 compares signal levels for each predetermined
frequency band. It has become.
[0051]
The frequency characteristic adjustment control unit 180 is also applicable when there is a
frequency band in which a difference greater than or equal to a predetermined signal level
occurs between the calculated frequency characteristic and the reference frequency
characteristic as a result of comparison. In order to adjust the signal level difference in the
frequency band within the predetermined signal level difference by the DSP processing unit 140,
control for adjusting the signal level in the corresponding frequency band is performed.
[0052]
In particular, in the present embodiment, since the frequency characteristic adjustment control
unit 180 matches the signal level of each frequency band in the calculated frequency number
characteristic with the signal level of each frequency band in the reference frequency
characteristic, a signal level difference occurs. In the current frequency band, the adjustment
value is output as data to the DSP processing unit 140 on the basis of 0 dB to adjust the
signal level, and the signal level value for each frequency band in the DSP processing unit 140
(hereinafter It is called "signal level value".
Signal level value setting processing is performed.
[0053]
In the present embodiment, when the frequency characteristic adjustment control unit 180
compares the calculated frequency characteristic with the reference frequency characteristic, if a
level of ± 5 dB or more occurs in each frequency band, the level does not exceed ± 5 dB. The
signal level value is set in the DSP processing unit 140 as follows.
[0054]
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The operation unit 190 is configured by a number of keys such as operation buttons for
inputting each operation command, a ten key, and other number keys.
The operation unit 190 of the present embodiment is used when performing various operations
in a call or an incoming call, and is also used when acquiring sound data from the server
apparatus 10 and when sound data is voiced.
[0055]
The display unit 200 is configured of a liquid crystal element or an EL (Electro Luminescence)
element, and is configured to display a predetermined image based on display data generated by
the display control unit 210.
[0056]
The display control unit 210 displays various images on the display unit 200 when making a call
with another telephone under the control of the system control unit 160 or when performing
communication with another communication terminal device. It is designed to generate display
data of
[0057]
The voice processing unit 220 performs predetermined processing on the voice to be transmitted
inputted via the microphone M when making a call with another telephone under the control of
the system control unit 160, and performs a communication control unit Transmission voice is
transmitted as data to the called party via 110.
[0058]
The reception control unit 230 is configured to cause the reception voice to be loudened to the
reception speaker SP2 when making a call with another telephone under the control of the
system control unit 160.
[0059]
Next, in the system control unit 160 according to this embodiment, a loudspeaker start process
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for starting loudspeakering of sound data, including the signal level value setting process in the
frequency characteristic adjustment controller 180, will be described using FIG.
FIG. 3 is a flow chart showing the operation of the loud start process for starting the loud sound
of the sound data in the system control unit 160 of this embodiment.
[0060]
In the following description, it is assumed that sound data to be loudened is acquired from the
server device 10 and stored in the data storage unit 120 in advance.
[0061]
First, when an instruction to expand predetermined sound data is input through the operation
unit 190 (step S101), the system control unit 160 lists sound data stored in the data storage unit
120. It is displayed, and waits for input of an operator's specific instruction in one sound data to
be loudened (step S102).
[0062]
Next, when an instruction to specify sound data is input by the operator via the operation unit
190 (step S103), the system control unit 160 instructs the frequency characteristic adjustment
control unit 180 to execute the signal level value setting process ((step S103) Step S104).
[0063]
First, the frequency characteristic adjustment control unit 180 acquires each characteristic data
of the decoding characteristic, the speaker characteristic, and the resonance characteristic from
the ROM / RAM 170, and comprehensive frequency characteristic at the time of sound
amplification of sound data to be amplified based on the respective characteristic data. Are
simulated and calculated (step S105).
[0064]
Next, the frequency characteristic adjustment control unit 180 compares the simulated and
calculated frequency characteristic with the reference frequency characteristic that indicates the
original frequency characteristic of the sound data to be loudened, and outputs a signal for each
preset frequency band. The level difference is calculated (step S106).
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[0065]
Next, the frequency characteristic adjustment control unit 180 performs DSP processing so that
the signal level difference is equal to or less than the predetermined signal level difference in the
frequency band where the signal level difference is equal to or more than the predetermined
level difference. The signal level value to be corrected is calculated in the unit 140 (step S107),
and the calculated signal level value is set in the DSP processing unit 140 (step S108), and the
signal level value setting process is ended.
[0066]
Finally, when the signal level value setting process is completed, the system control unit 160
starts to louden the sound data (step S109), and ends this operation.
At this time, the DSP processing unit 140 performs adjustment processing of frequency
characteristics on the sound data input based on the signal level value setting processing.
[0067]
As described above, when reproducing sound data, the portable telephone 100 of the present
embodiment is calculated based on the characteristic data in the frequency characteristic related
to reproduction and sound amplification when the sound data is amplified from the ringer sound
speaker SP1. The frequency characteristic of the acquired sound data is compared with that of
the acquired sound data, and the frequency characteristic of the sound data to be amplified is
adjusted based on the comparison result.
[0068]
Therefore, even when the original sound quality of the sound data is changed or deteriorated due
to the decoding characteristic, the speaker characteristic, the resonance characteristic, etc., the
portable telephone 100 can obtain the acquired sound data with respect to the sound data to be
loudened. Since adjustment can be made to match the frequency characteristics, it is possible to
accurately reproduce sound data that reflects the intention of the creator who produces and
provides the sound data.
[0069]
In addition, since the portable telephone 100 according to the present embodiment calculates the
frequency characteristic when the sound data acquired is amplified based on the characteristic
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data stored in advance, the frequency characteristic can be calculated easily and accurately. Can.
[0070]
In addition, since the portable telephone 100 according to the present embodiment adjusts the
signal level for each frequency band with respect to sound data, the frequency characteristic is
adjusted digitally on the data when the sound data is amplified. Can be easily adjusted.
[0071]
In the present embodiment, the frequency characteristic of sound data to be loudened is
calculated based on various characteristic data stored in the ROM / RAM 170, but the ringing
sound speaker P1 generates sound data The above-mentioned frequency characteristics may be
calculated by amplifying and analyzing the amplified loud sound.
In this case, a microphone unit for collecting the loud sound is connected to the portable
telephone 100, and the loud sound is collected using the connected microphone unit.
[0072]
Further, in the present embodiment, the DSP processor 140 adjusts the frequency characteristics
of the sound data to be amplified, but of course, after converting the sound data into a sound
signal, the frequency relative to the sound signal is calculated. The characteristics may be
adjusted.
[0073]
Further, although the present embodiment has been described using the portable telephone 100,
it goes without saying that the present invention can be applied to any communication terminal
device capable of transmitting and receiving mail data.
[0074]
Further, in the present embodiment, the system control unit 160 and the frequency characteristic
adjustment control unit 180 are each configured by a central processing unit (CPU), but even if
each configuration is realized by the same central processing unit Each configuration may be
realized by an individual central processing unit.
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[0075]
In the present embodiment, the characteristic data is stored in advance in the ROM / RAM 170.
However, the characteristic data is acquired from the predetermined server device 10 together
with the sound data or separately from the sound data and stored in the ROM / RAM 170. It may
be stored.
[0076]
Further, in the present embodiment, the description is made using sound data amplified as a
viewing purpose, but of course, the present invention can be applied to all sound data amplified
such as a ringtone.
[0077]
Further, in the present embodiment, the signal level value setting process is performed before the
sound data is amplified, but the predetermined time of the sound data being amplified is based
on the characteristic data stored in the ROM / RAM 170. The frequency characteristic and the
signal level value at each interval may be simulated and calculated, and the calculated signal level
value may be set in the DSP processing unit 140.
That is, the portable telephone 100 may adjust the frequency characteristic in real time at
predetermined time intervals when reproducing sound data.
[0078]
Further, in the present embodiment, the signal level value setting process is performed each time
the sound data instructed to be sounded is amplified, but this process is performed only when
the sound data is initially instructed to be sounded. While storing the change in signal level value
in each frequency band as data, the frequency characteristic adjustment control unit 180
controls the DSP processing unit 140 based on the stored data at the time of the subsequent
sound data amplification, The frequency characteristic of the sound data may be adjusted.
[0079]
FIG. 1 is a block diagram showing the configuration of a sound data distribution system to which
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a portable telephone according to an embodiment belongs.
It is a block diagram which shows the structure of the portable telephone which concerns on this
application.
It is a flowchart which shows operation ¦ movement of the loud sound start process at the time of
loud sound data in the system control part of this embodiment.
Explanation of sign
[0080]
100 ... portable telephone 110 ... communication control unit 120 ... data storage unit 130 ... data
reproduction unit 140 ... DSP processing unit 150 ... power amplifier 160 ... system control unit
170 ... ROM / RAM 180 ... frequency characteristic adjustment control unit 190 ... operation unit
200 ... display unit 210 ... display control unit 220 ... voice processing unit 230 ... reception
control unit M ... microphone SP1 ... ringer ring speaker SP2 ... reception speaker
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