close

Вход

Забыли?

вход по аккаунту

JP2010103756

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
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 JP2010103756
An object of the present invention is to improve the ease of listening to both audio and
information presentation audio simultaneously. SOLUTION: It is judged by a DSP 13 whether or
not a pure tone band of an audio voice signal output from an audio device 11 and a pure tone
band of an information presentation voice signal output from a navigation system 12 overlap.
When not overlapping, the volume of the frequency band of the audio signal of either the audio
signal or the information presenting audio signal, which corresponds to the pure tone band of
either audio signal or the information presenting audio signal, is DSP 13 After the attenuation,
the audio voice signal and the information presentation voice signal are synthesized and the
voice is output from the speaker 15. [Selected figure] Figure 1
Audio output device and audio output method
[0001]
The present invention relates to an audio output device and an audio output method for
simultaneously controlling the output of an audio voice output from an audio device and an
information presentation voice output from an information presentation device.
[0002]
Conventionally, as a technique of this type, for example, those described in the following
documents are known (see Patent Documents 1 and 2).
08-05-2019
1
In the techniques described in these documents, audio voice output from an on-vehicle audio
device and information presentation output from an information presentation device such as an
on-vehicle navigation system other than the audio device, for example, an on-vehicle navigation
system When voice and sound are output simultaneously, the user can easily hear the
information presentation voice by attenuating or pausing the audio voice. Patent Document 1:
Japanese Patent Application Laid-Open No. 2001-246987 Japanese Patent Application LaidOpen No. 2004-320582
[0003]
In the above-mentioned prior art, when the output of the audio voice and the output of the
information presentation voice overlap, the audio voice is simply attenuated or stopped, which
causes a problem that the audio voice becomes difficult to hear.
[0004]
Therefore, the present invention has been made in view of the above, and an object of the
present invention is an audio output device and an audio output device with improved ease of
hearing both audio and information presentation audio simultaneously output. An audio output
method is provided.
[0005]
In order to achieve the above object, according to the present invention, when the pure tone
band of the audio voice signal output from the audio means and the pure tone band of the
information presentation voice signal output from the information presenting means do not
overlap, Attenuating the volume of the frequency band of the audio signal of either the audio
signal or the information presentation audio signal, which corresponds to the pure tone band of
the audio signal of the signal or the information presentation audio signal, It is characterized by
synthesizing and outputting voice.
[0006]
According to the present invention, when the pure tone band of the audio voice signal and the
information presentation voice signal is not superimposed, the volume characteristic of the
partial frequency band excluding the pure tone band of any one voice signal is attenuated by the
frequency characteristic adjusting means. Thereafter, both voice signals are synthesized and
voice-outputted, so that the ease of listening to both voices can be improved.
[0007]
08-05-2019
2
Hereinafter, the best embodiment for carrying out the present invention will be described using
the drawings.
[0008]
FIG. 1 is a diagram showing the configuration of an audio output apparatus according to a first
embodiment of the present invention.
The audio output apparatus of the first embodiment shown in FIG. 1 includes audio audio output
from an on-vehicle audio apparatus and information presentation audio such as route guidance
output from an on-vehicle navigation system as an information presentation apparatus. An audio
(sound) device 11, a navigation system 12, a DSP (digital signal processor) 13 that performs
voice processing, and a signal synthesis device. 14 and a speaker 15 are provided.
[0009]
Note that the voice output device of the present invention is not limited to in-vehicle use, and the
information presentation voice is not limited to the voice output from the navigation system 12,
and in the case of in-vehicle, it is output from a toll collection system, for example. Voice may be
used.
[0010]
The audio device 11 is configured to include a radio 111 and a CD player 112, and audio signals
output from these audio devices are output to the DSP 13.
The audio apparatus 11 may be configured to include, for example, an MD player and a cassette
player in addition to the radio 111 and the CD player 112.
[0011]
The navigation system 12 is a conventionally known route guidance system that performs route
display and the like by screen display and voice using autonomous navigation devices such as
08-05-2019
3
GPS (global positioning system), vehicle speed pulses, gyros, and road map information. And a
control unit (C / U) 121 that functions as a control center of the system.
The control unit 121 is realized by, for example, a microcomputer or the like provided with
resources such as a CPU, a storage device, and an input / output device necessary for a computer
that controls various operation processing based on a program (control logic). It may be
configured to include existing application specific integrated circuits such as ASICs and FPGAs
designed to realize the operation processing of the present invention described below.
The control unit 121 outputs an information presentation voice signal such as route guidance in
which a frequency band is preset to the DSP 13 and the signal synthesis device 14.
[0012]
The DSP 13 receives the audio audio signal output from the audio device 11 and the information
presentation audio signal such as route guidance output from the control unit 121 of the
navigation system 12 and determines the frequency band of the audio audio signal and the
information presentation audio signal. Analyze and identify the pure tone band (peak band that
peaks in the frequency band of human speech) in the speech frequency band, and determine
whether the pure tone band of the audio speech signal and the information presentation speech
signal is superimposed or not. .
As a result of the determination, when the pure tone bands of both do not overlap, the DSP 13
sets the volume of the frequency band of the audio voice signal corresponding to the pure tone
band of the information presentation voice signal to a predetermined level (including 0 level).
Attenuate to
Here, the amount of attenuation is determined by experimental results so that both can be heard
when both audio signals are output simultaneously.
[0013]
The signal synthesis device 14 superimposes and synthesizes the audio speech signal attenuated
by the DSP 13 and the information presentation speech signal not attenuated, and outputs the
synthesized speech signal to the speaker 15.
08-05-2019
4
[0014]
The speaker 15 outputs the synthesized voice signal generated by the signal synthesizer 14 as a
voice, and simultaneously outputs an audio voice and an information presentation voice.
[0015]
Next, the operation of the first embodiment will be described with reference to the signal
waveform diagram of each signal voice shown in FIG.
[0016]
First, when the audio voice signal output from the audio device 11 has a frequency characteristic
as shown in FIG. 2A, for example, as a result of performing the frequency analysis by the DSP 13,
the speech frequency band is as shown in FIG. The frequency band indicated by reference
numeral 21 is assumed, and the pure tone band of the speech frequency band 21 is assumed to
be, for example, the frequency band indicated by reference numeral 22 in FIG.
[0017]
On the other hand, when the information presentation voice signal outputted from the navigation
system 12 has a frequency characteristic as shown by the broken line in FIG. 2B, for example, the
pure tone band is the same as the figure (b in FIG. And the frequency band indicated by reference
numeral 23).
[0018]
Next, the DSP 13 determines whether the pure tone band 22 of the audio voice signal having
such frequency characteristics and the pure tone band 23 of the information presentation voice
signal overlap.
As a result of the discrimination, in the frequency characteristics shown in FIGS. 2 (a) and 2 (b),
both pure tone bands do not overlap, so as shown in FIG. 2 (c), audio voice corresponding to the
pure tone band of the information presentation voice signal The volume of the frequency band
23 of the signal is attenuated to zero level and deleted.
08-05-2019
5
[0019]
Next, as shown in FIG. 2 (d), the audio synthesis signal (indicated by a solid line) from which the
volume of the frequency band 23 corresponding to the pure tone band of the information
presentation speech signal is deleted is the navigation system 12 Is synthesized with the
information presentation voice signal (shown by a broken line) output from the voice
communication system, and the synthesized voice signal is given to the speaker 15, and the
frequency band 23 corresponding to the pure tone band of the information presentation voice
signal is deleted through the speaker 15. The output audio sound and the information
presentation sound output from the navigation system 12 and not adjusted are simultaneously
output.
[0020]
As described above, in the first embodiment, when the pure tone band of the audio voice signal
and the pure tone band of the information presentation voice signal do not overlap, the volume
of the frequency band corresponding to the pure tone band of the information presentation voice
in the audio voice signal is selected. Since the audio voice signal and the information presentation
voice signal from which the volume of this partial frequency band has been removed are
synthesized and output, the audio voice and the information presentation voice are generated
without impairing the audio voice intelligibility. This makes it possible to distinguish between the
two voices, making it easier to hear both voices.
Further, by analyzing the frequency characteristics of the audio voice and specifying the pure
tone band, the attenuation of the volume of the pure tone band is avoided, and the ease of
listening to the audio voice is not impaired.
Furthermore, since the pure tone band of the information presentation voice is not hindered by
the audio voice, the information presentation voice becomes easy to hear.
[0021]
In the first embodiment, the audio voice is attenuated. However, the information presentation
voice is attenuated instead of the audio voice, and the information presentation voice and the
audio voice which are attenuated are synthesized and output. It is also good.
[0022]
08-05-2019
6
FIG. 3 is a diagram showing the configuration of an audio output apparatus according to a
second embodiment of the present invention.
The audio output apparatus of the second embodiment shown in FIG. 3 includes audio audio
output from an on-vehicle audio apparatus and information presentation audio such as route
guidance output from an on-vehicle navigation system as an information presentation apparatus.
It is a device that adjusts and controls both voices when outputting at the same time, and
comprises an audio (sound) device 11, a navigation system 12, a DSP (digital signal processor)
13, a signal synthesis device 14 and a speaker 15. Is configured.
The audio device 11, the signal combining device 14, and the speaker 15 have the same
functions as those in FIG.
[0023]
The navigation system 12 has a voice recognition unit 122, A / D conversion, and the like as a
function related to an operation input by voice recognition for the user to set a destination by
voice in addition to the control unit 121 similar to FIG. And a microphone (MIC) 124.
The speech recognition unit 122 includes an acoustic analysis unit 1221, a recognition decoder
unit 1222, an acoustic model 1223, and a dictionary 1224.
[0024]
In the navigation system 12, among the voice signals other than the user by the radio 111 of the
audio device 11 and the CD player 112, and the voice signal by the user's speech input through
the microphone 124, the voice signal and microphone output from the radio 111 Since the audio
signal output from 124 is an analog signal, these analog signals are converted into digital signals
by the A / D converter 123 and input to the acoustic analysis unit 1221, and the audio signal
output from the CD player 112 is digital Since it is a signal, it is input to the acoustic analysis unit
1221 as it is.
08-05-2019
7
The digital signal input to the acoustic analysis unit 1221 is voice-recognized using the acoustic
model 1223 and the dictionary 1224, and the voice-recognized voice signal is decoded and
decoded by the recognition decoder unit 1222 so that the navigation system 12 can interpret it.
The voice signal is supplied to the control unit 121.
[0025]
The DSP 13 receives the audio audio signal output from the audio device 11 and the information
presentation audio signal such as route guidance output from the control unit 121 of the
navigation system 12 and determines the frequency band of the audio audio signal and the
information presentation audio signal. The analysis is performed to specify the pure tone band in
the speech frequency band, and it is determined whether the pure tone band of the audio voice
signal and the information presentation voice signal is superimposed. As a result of the
discrimination, when both pure tone bands overlap, the DSP 13 shifts the pure tone band of the
information presentation voice signal to such an extent that the pure tone bands of both do not
overlap, and shifts the audio voice signal corresponding to the pure tone band after shifting. The
volume of the frequency band is attenuated to a preset predetermined level (including zero level).
[0026]
Note that the amount of shift and the direction of shift of the frequency characteristic of the
information presentation audio signal are uniquely determined according to the degree of
overlap of both audio signals determined by the analysis of the frequency band of the audio
audio signal and the information presentation audio signal. Further, the attenuation amount of
the audio sound signal is determined by the result of experiments or the like so that both can be
heard when both sound signals are output simultaneously.
[0027]
Note that the frequency analysis of the audio voice signal and the information presentation voice
signal performed by the DSP 13 may be performed using the frequency analysis function
provided in the acoustic analysis unit 1221 of the navigation system 12. Can reduce the burden
of
08-05-2019
8
[0028]
Next, the operation of the second embodiment will be described with reference to the signal
waveform diagram of each audio signal shown in FIG.
[0029]
First, when the audio voice signal output from the audio device 11 has a frequency characteristic
as shown in FIG. 4A, for example, as a result of the frequency analysis performed by the DSP 13,
the pure tone band is, for example, as shown in FIG. It is assumed that the frequency band is
indicated by reference numeral 41.
[0030]
On the other hand, when the information presentation voice signal outputted from the navigation
system 12 has a frequency characteristic as shown by an alternate long and short dash line in
FIG. It is assumed that the frequency band is indicated by reference numeral 42 in b).
[0031]
Next, it is determined by the DSP 13 whether or not the pure tone band 41 of the audio voice
signal having such frequency characteristics and the pure tone band 42 of the information
presentation voice signal overlap.
As a result of the discrimination, in the frequency characteristics shown in FIGS. 4A and 4B, since
both pure tone bands are superimposed, as shown by the arrow 43 in FIG. 4B, the pure tone
band 42 of the information presentation voice signal is The frequency characteristic of the
information presentation voice signal so that the pure tone band 41 of the audio voice signal and
the pure tone band 42 of the information presentation voice signal do not overlap. Is changed.
[0032]
Next, as shown in FIG. 4C, the volume of the frequency band 44 of the audio voice signal
corresponding to the pure tone band 42 after the information presentation voice signal is shifted
is attenuated to 0 level and cut.
08-05-2019
9
After that, the signal synthesizing device 14 synthesizes the audio voice signal whose volume in
the partial frequency band is cut and the information presentation voice signal whose pure tone
band is shifted, and the synthesized voice signal is given to the speaker 15. Thus, the audio voice
signal in which the volume of the partial frequency band is cut and the information presentation
voice signal in which the pure tone band is shifted are simultaneously output.
[0033]
As described above, in the second embodiment, when the pure tone band of the audio voice
signal and the pure tone band of the information presentation voice signal overlap, the pure tone
band of the information presentation voice signal is shifted to the pure tone band of the
information presentation voice signal. Adjust the frequency characteristics so that it does not
overlap with the pure tone band of the audio voice signal, and cut the volume of the frequency
band of the audio voice signal corresponding to the pure tone band of the information
presentation voice signal after shifting Since the synthesis is performed and output, it is possible
to improve the discrimination of the information presentation voice while securing the ease of
listening to the audio voice, and it is possible to make both voices easy to hear.
Further, by analyzing the frequency characteristics of the audio voice and the information
presentation voice to specify the pure tone band, it is possible to avoid the attenuation of the
volume of the pure tone band of both voices.
Furthermore, since the pure tone band of the information presentation voice is not hindered by
the audio voice, the information presentation voice becomes easy to hear.
[0034]
In the second embodiment, the pure tone band of the information presentation voice is shifted,
the volume of the partial frequency band of the audio voice is cut and both are synthesized, but
the pure tone band of the audio voice is shifted instead of the information presentation voice,
Instead of the audio sound, the volume of a part of the frequency band of the information
presentation sound may be cut.
[0035]
Note that the correspondence between the configuration requirements of the first and second
embodiments and the configuration requirements in the claims is that the audio device 11 is an
08-05-2019
10
audio unit, the navigation system 12 is an information presentation unit, and the DSP 13 is a
frequency characteristic adjustment unit. , The signal synthesizer 14 and the speaker 15
constitute an audio output means.
[0036]
It is a figure showing composition of an audio output device concerning Example 1 of the present
invention.
It is a figure which shows the frequency characteristic of the audio ¦ voice signal which concerns
on Example 1 of this invention.
It is a figure which shows the structure of the audio ¦ voice output apparatus based on Example 2
of this invention. It is a figure which shows the frequency characteristic of the audio ¦ voice
signal which concerns on Example 2 of this invention.
Explanation of sign
[0037]
11 Audio device 12 Navigation system 13 DSP (digital signal processor) 14 Signal combining
device 15 Speaker 111 Radio 112 CD player 121 Control unit 122 Speech recognition unit 123
A / D converter 124 Microphone 1221 ... acoustic analysis unit 1222 ... recognition decoder unit
1223 ... acoustic model 1224 ... dictionary
08-05-2019
11
1/--страниц
Пожаловаться на содержимое документа