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DESCRIPTION JP2003037650

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DESCRIPTION JP2003037650
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
portable telephone having a function of storing sound data input from the outside and outputting
the stored sound data to the outside, in which the output of input sound data is increased or
decreased. The present invention relates to a mobile phone that adjusts the level of sound output
from a speaker accordingly.
[0002]
2. Description of the Related Art In recent years, mobile phones have been incorporated with a
function of storing data of sound input from the outside and outputting the data of the stored
sound to the outside.
[0003]
However, the input level of the sound becomes various levels depending on the input person, and
when the sound is output to the outside, the sound is too loud and is output as a broken sound or
is too small to be heard. There is a case where it does not match the speaker characteristic of the
portable telephone, such as being output as an extremely small sound.
[0004]
An object of the present invention is to provide a portable telephone which can output to the
outside with an optimum volume and sound quality with respect to the speaker characteristic of
the portable telephone regardless of the level of the input by the input person.
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1
[0005]
According to the present invention, there is provided a level detection circuit for detecting a peak
level of voice and music data inputted from the outside, and a volume for setting a reproduction
level of the voice and music data. A digital signal processing unit, a memory unit for storing the
input voice and music data, the detected peak level, and an optimum peak level for a preset
speaker used, and the detected peak level and Control to control the volume so that the input
audio / music data is output from the use speaker at an optimum output level based on the
difference value by comparing with the optimum peak level, calculating the difference thereof A
portable telephone characterized by having a means is obtained.
[0006]
Further, according to the present invention, there is provided a frequency characteristic analysis
circuit for analyzing frequency characteristics of voice and music data inputted from the outside,
and a variable type filter for setting the frequency characteristics of the voice and music data to
predetermined characteristics. A digital signal processing unit, a memory unit for storing the
input voice and music data, and the analyzed frequency characteristic, the analyzed frequency
characteristic and an optimum frequency characteristic for a preset speaker used Control means
is provided for comparing and adjusting the analyzed frequency characteristic to be the optimum
frequency characteristic, and controlling the variable filter to be outputted from the use speaker
with an optimum output level and sound quality. A mobile phone characterized by
[0007]
Further, according to the present invention, a level detection circuit for detecting a peak level of
voice / music data inputted from the outside, a frequency characteristic analysis circuit for
analyzing frequency characteristics of voice / music data inputted from the outside, the voice · A
digital signal processing unit having a volume for setting the reproduction level of music data
and a variable filter for setting the frequency characteristic of the voice / music data to a
predetermined characteristic, the input voice / music data, the detection Memory section for
storing the peak level, the analyzed frequency characteristic, and the optimum peak level and the
optimum frequency characteristic for the preset speaker used, and comparing the detected peak
level with the optimum peak level , The difference is calculated, and the input audio / music data
has an optimum output level based on the difference value. The volume is controlled to be output
from the use speaker, and the analyzed frequency characteristic is compared with the optimal
frequency characteristic, and the analyzed frequency characteristic is adjusted to be the optimal
frequency characteristic. And a control means for controlling the variable filter so as to be
outputted from the use speaker at an optimum output level and sound quality.
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[0008]
BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a mobile phone according
to the present invention will be described below with reference to the drawings.
According to FIG. 1, the mobile phone is called an external sound (hereinafter referred to as voice
and music data).
), An amplifier 7 which amplifies voice and music data input from the microphone and transmits
it to an A / D converter, and an A / D converter 6 which converts the input voice and music data
from analog to digital , A level detection circuit 4 for detecting the peak level of the voice / music
data converted into digital, a memory 1 for storing the voice / music data converted into digital
and its additional information, and The volume 5 which adjusts the level when outputting the
voice and music data to the outside, the D / A converter 9 which converts the stored voice and
music data from digital to analog, the voice and music which is D / A converted It is configured to
include an amplifier 10 for amplifying data, a speaker 11 for outputting voice and music data to
the outside, and a control unit 2 for controlling all of them.
[0009]
Next, the operation of the portable telephone having the above configuration will be described.
First, an operation of storing voice and music data input from the outside will be described with
reference to FIGS.
Audio and music data are captured from the outside using the microphone 8 (step S21).
The acquired voice / music data is amplified by the amplifier 7, and the voice / music data input
by the A / D converter 6 is converted from analog to digital (step S22).
The peak level is detected by the level detection circuit 4 from the converted voice / music data
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(step S24), and the voice / music data is stored in the memory 1, and the peak level detected
from the voice / music data is preset and used The difference from the optimum peak level for
the speaker 11 being stored is simultaneously stored as additional information of voice and
music data (steps S23, 25). FIG. 3 is a view showing an example of the state of storing voice /
music data and its additional information in the memory 1.
[0010]
Next, the operation of outputting the stored voice and music data to the outside will be described
with reference to FIGS. The voice and music data stored in the memory 1 are read out (step S31).
Further, the difference between the peak level of the voice / music data stored as the additional
information of the voice / music data and the optimum peak level of the speaker 11 is read (step
S33), and the level difference of the peak level is adjusted with the volume 5. (Step S32). The
voice / music data thus adjusted is converted from digital to analog by the D / A converter 9
(step S34), and the voice / music data is amplified by the amplifier 10 and output to the outside
from the speaker 11 (step S35) . FIG. 5 is a diagram showing an example of the speaker output.
By adjusting the small output level when small audio / music data is input to the speaker being
used and the large output level when large audio / music data is input, regardless of the level of
the input level The signal is output from the speaker 11 at an optimal output level.
[0011]
Next, another embodiment of the present invention will be described with reference to FIG. The
above-described embodiment detects the peak level of the input voice / music data, and adjusts
the volume of the voice / music data to be output based on the detected peak level, thereby
adjusting the characteristics of the speaker used in the mobile phone. It is assumed that the
output is from the speaker at the optimum level that matches, but as shown in FIG. 6, the level
detection circuit is replaced by the frequency analysis circuit 64 and the volume is replaced by
the variable filter 65 to input voice and music data. On the other hand, the frequency
characteristic is analyzed, and the result of analyzing the frequency characteristic is stored in the
memory 61 as additional information of the input voice / music data. The control unit 62
controls the variable filter 65 based on the additional information when outputting voice and
music data. That is, the control unit 62 compares the analyzed frequency characteristic with the
optimum frequency characteristic for the preset speaker used, adjusts the analyzed frequency
characteristic to be the optimum frequency characteristic, and is optimum. The variable filter 65
is controlled so as to be output from the speaker 71 at a proper output level and sound quality.
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[0012]
Although not shown, it is needless to say that a mobile telephone having a form combining the
above-described one embodiment and the above-described other embodiment can also be
realized. That is, a level detection circuit for detecting peak levels of voice and music data
inputted from the outside, a frequency characteristic analysis circuit for analyzing frequency
characteristics of voice and music data inputted from the outside, and a reproduction level of the
voice and music data A digital signal processing unit having a volume and a variable filter for
setting frequency characteristics of the voice / music data to predetermined characteristics, the
input voice / music data, the detected peak level, the analyzed And a memory unit for storing the
optimum peak level and the optimum frequency characteristic for preset use speakers,
comparing the detected peak level with the optimum peak level, and calculating the difference
between the detected peak level and the optimum peak level. Calculating the input voice and
music data at the optimum output level based on the difference value. Controlling the volume so
as to be output from a mosquito, comparing the analyzed frequency characteristic with the
optimal frequency characteristic, and adjusting the analyzed frequency characteristic to be the
optimal frequency characteristic; It is characterized by including control means for controlling
the variable filter so as to be outputted from the use speaker at an optimum output level and
sound quality.
[0013]
According to such a configuration, the effects of both the portable telephone according to the
above-described embodiment and the above-described other embodiments can be obtained at
one time, and the input voice / music data can be portable. It is possible to output to the outside
with more optimal volume and sound quality for the speaker characteristics of the telephone.
[0014]
According to the present invention, in a portable telephone having a function of storing data of a
sound input from the outside and outputting the data of the stored sound to the outside, the
portable telephone can respond to the input sound By adjusting to the optimal peak level of the
speaker being used, it is possible to output to the outside with the optimum volume and sound
quality for the speaker characteristic of the mobile phone, regardless of the input level by the
input person.
[0015]
Brief description of the drawings
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[0016]
1 is a diagram showing a configuration of a mobile phone according to an embodiment of the
present invention.
[0017]
2 is a flow chart for explaining the operation of storing voice and music data input from the
outside.
[0018]
3 is a diagram showing the storage state of the voice / music data and the additional information
in the memory.
[0019]
It is a flowchart explaining the operation | movement which outputs the audio | voice / music
data memorize | stored in FIG. 4 outside.
[0020]
5 is a diagram showing the waveform of voice and music data output from the speaker.
[0021]
6 is a diagram showing a configuration of a mobile phone according to another embodiment of
the present invention.
[0022]
Explanation of sign
[0023]
REFERENCE SIGNS LIST 1 memory 2 control unit 3 digital signal processing unit 4 level detection
circuit 5 volume 6 A / D converter 7, 10 amplifier 8 microphone 9 D / A converter 11 speaker
61 memory 62 control unit 63 digital signal processing unit 64 frequency analysis circuit 65
Variable filter 66 A / D converter 67, 70 Amplifier 68 Microphone 69 D / A converter 71
Speaker
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