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JP2006292918

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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 JP2006292918
An object of the present invention is to reduce the degree to which it is difficult for a navigation
device's guidance voice to be mixed with other sounds. A frequency characteristic information
acquisition unit 32 of a vehicle navigation device 2 acquires frequency characteristic information
of a speaker's voice in a vehicle from a mobile phone 50 using a communication circuit 31, and a
voice conversion unit based on the information. By controlling 26, the frequency characteristic of
the guidance voice output to the speaker 24 is adjusted to emphasize the low level band so as to
be easy to hear in the input voice. [Selected figure] Figure 3
Navigation device and program for navigation device
[0001]
The present invention relates to a navigation device for performing voice guidance or voice
recognition and a program for the navigation device.
[0002]
2. Description of the Related Art Conventionally, navigation devices that provide guidance by
voice are widely used.
Also, conventionally, a navigation device having a function of specifying a word represented by
the voice, ie, a voice recognition function, is widely used by collating the feature amount of the
voice uttered by the user with a voice recognition dictionary stored in advance. There is.
08-05-2019
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[0003]
However, when the navigation device performs voice guidance, the guidance voice may be mixed
with other sounds such as speech sounds, which may make it difficult to hear.
[0004]
SUMMARY OF THE INVENTION In view of the above, it is a first object of the present invention
to reduce the degree to which the guidance voice of a navigation device may be obscured by
other sounds.
[0005]
In addition, since the pronunciation and the accent are slightly different depending on the person
even in the same word, it is difficult to accurately perform the speech of all people using a single
speech recognition dictionary.
[0006]
In view of the above-described point, the second object of the present invention is to make it
possible to switch a speech recognition dictionary used for speech recognition of a navigation
device for each person who is an object of speech recognition.
[0007]
The invention according to claim 1 for achieving the above object is a frequency analysis means
for analyzing frequency characteristics of input sound, and an audio to be output to a speaker
based on the frequency characteristics analyzed by the frequency analysis means. And a
frequency characteristic adjusting means for adjusting frequency characteristics to be easy to
hear in the input sound.
[0008]
Thus, the navigation device adjusts the frequency characteristics of the sound to be output to the
speaker based on the frequency characteristics of the input sound so that the user can easily
hear the sound in the input sound. The degree to which it is difficult for the other sounds to be
confused is reduced.
[0009]
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The invention according to claim 2 is the navigation apparatus according to claim 1, wherein the
frequency characteristic adjusting unit is configured to control the intensity of the input sound
based on the frequency characteristic analyzed by the frequency analysis unit. The frequency
characteristic of the sound output to the speaker is adjusted to be easy to be heard in the input
sound by utilizing the low frequency band compared to the frequency band of (4).
[0010]
Thus, as a specific method of adjusting the navigation device so that it is easy to hear in the input
sound, the intensity of the input sound may use a lower frequency band compared to other
frequency bands. It may be done.
[0011]
According to the third aspect of the present invention, frequency characteristic information
acquisition means for acquiring frequency characteristic information of a speaker's voice from a
portable telephone using a communication circuit, and frequency characteristic information
acquired by the frequency characteristic information acquisition means. And a frequency
characteristic adjusting unit configured to adjust the frequency characteristic of the sound to be
output to the speaker so as to be easy to hear in the speaker's sound.
[0012]
As described above, the navigation apparatus adjusts the frequency characteristic of the sound to
be output to the speaker so as to be easily audible in the speech of the speaker based on the
frequency characteristic information of the speaker's voice acquired from the mobile phone. The
degree to which the guidance voice of the navigation device is obscured by the voice of the
speaker in the vehicle having the mobile phone is reduced.
[0013]
The invention according to claim 4 is the navigation apparatus according to claim 3, wherein the
frequency characteristic adjusting unit is configured to transmit the strength of the input voice
based on the frequency characteristic analyzed by the frequency analysis unit. By using a lower
frequency band as compared with the frequency band, the frequency characteristic of the sound
output to the speaker is adjusted to be easy to be heard in the voice of the speaker.
[0014]
Thus, as a specific method of adjusting the navigation device to be easy to hear in the input voice,
it is desirable that the strength of the voice of the speaker be lower than that of other frequency
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bands. It may be
[0015]
The invention according to claim 5 is a storage medium for recording different sets of voice
recognition dictionaries, a speaker voice information acquisition means for obtaining speaker
voice information from a mobile phone using a communication circuit, and A dictionary
specifying unit that specifies a voice recognition dictionary having a similarity to the feature
information of the voice acquired by the speaker voice information acquiring unit among the
speech recognition dictionary included in the storage medium, and the dictionary identifying unit
The navigation device includes a voice recognition unit that identifies a word represented by the
input voice by collating the identified voice recognition dictionary with the feature amount of the
input voice.
[0016]
As described above, since the navigation device can selectively use the voice recognition
dictionary having the similarity to the feature information of the voice of the speaker acquired
from the mobile phone using the communication circuit, the voice recognition can be performed.
Compared to using a single set of speech recognition dictionaries, the accuracy of speech
recognition is improved.
[0017]
The invention according to claim 6 is a frequency analysis means for analyzing the frequency
characteristics of input sound, and a frequency characteristic of sound to be output to a speaker
based on the frequency characteristics analyzed by the frequency analysis means, It is a program
for a navigation device that causes a computer to function as frequency characteristic adjustment
means for adjusting so that it becomes easy to hear in the input sound.
[0018]
Thus, the invention according to claim 1 can be grasped as a program.
[0019]
The invention according to claim 7 is a frequency characteristic information acquiring means for
acquiring frequency characteristic information of a speaker's voice from a portable telephone
using a communication circuit, and frequency characteristic information acquired by the
frequency characteristic information acquiring means. Is a program for a navigation device that
causes a computer to function as frequency characteristic adjusting means for adjusting the
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frequency characteristic of the sound output to the speaker so that it is easy to hear in the input
sound.
[0020]
Thus, the invention according to claim 3 can be grasped as a program.
[0021]
The invention according to claim 8 is a storage medium for recording a plurality of different
speech recognition dictionaries, and a speaker voice information acquisition means for acquiring
feature information of a speaker's voice from a mobile phone using a communication circuit, A
dictionary specifying means for specifying a voice recognition dictionary having higher similarity
to the feature information of the voice obtained by the speaker voice information obtaining
means among a plurality of sets of voice recognition dictionaries included in the storage medium;
The navigation device program is a program for a navigation device that causes a computer to
function as voice recognition means for identifying a word represented by an input voice by
collating the voice recognition dictionary specified by the means with the feature amount of the
input voice.
[0022]
Thus, the invention according to claim 5 can be grasped as a program.
[0023]
First Embodiment Hereinafter, a first embodiment of the present invention will be described.
FIG. 1 shows the hardware configuration of the vehicle navigation device 1 according to the
present embodiment.
As described in detail below, the vehicle navigation device 1 of the present embodiment makes it
easier to hear the frequency characteristics of the sound to be output to the speaker among the
input sound, based on the frequency characteristics of the input sound. It is supposed to be
adjusted.
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[0024]
The vehicle navigation device 1 includes a position detector 11, an operation switch group 12, an
image display 13, a RAM 16, a ROM 17, an external storage medium 18, a control circuit 19, a
microphone 21, an A / D converter (A / D in the figure). , A frequency analysis unit 23, a speaker
24, a D / A converter (denoted as D / A in the drawing) 25, and a sound conversion unit 26.
[0025]
The position detector 11 includes sensors such as a known geomagnetic sensor, a gyroscope, a
vehicle speed sensor, and a GPS receiver, all of which are not shown, and based on the nature of
each of these sensors, the current position and orientation of the vehicle Information for
identifying the information is output to the control circuit 19.
[0026]
The operation switch group 12 includes an input device such as a plurality of mechanical
switches provided in the vehicle navigation device 1 and a touch panel provided overlapping the
display surface of the image display device 13. A signal based on the touch is output to the
control circuit 19.
[0027]
The image display device 13 displays a video based on the video signal output from the control
circuit 19 to the user.
As the display video, for example, there is a map centering on the current position.
The external storage medium 18 is a non-volatile storage medium such as an HDD, and stores a
program read and executed by the control circuit 19, map data for route guidance, and the like.
The map data includes road data including location of links and nodes, type, connection
relationship information between nodes and links, and facility data.
[0028]
The control circuit 19 executes a program for the operation of the vehicle navigation device 1
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read out from the ROM 17 and the external storage medium 18, and reads out information from
the RAM 16, the ROM 17 and the external storage medium 18 at the time of execution.
Information is written to the external storage medium 18, and signals are exchanged with the
position detector 11, the operation switch group 12, the image display device 13, and the sound
converter 26.
[0029]
Specific processing performed by the control circuit 19 executing a program includes current
position identification processing, guidance route search processing, route guidance processing,
and the like.
[0030]
The current position specifying process is a process of specifying the current position or
direction of the vehicle based on the signal from the position detector 11 using a known
technique such as map matching.
[0031]
The guidance route calculation process is a process of receiving an input of a destination by the
user from the operation switch group 12 and calculating an optimum guidance route from the
current position to the destination.
[0032]
The route guidance processing reads out map data from the external storage medium 18, and
outputs an image in which the calculated guidance route, destination, passing point, current
position and the like are superimposed on the map indicated by the map data to the image
display device 13. When the subject vehicle arrives at the front of the guidance intersection, etc.,
it is processing to output a guidance voice signal instructing the right turn, left turn, etc. to the
voice conversion unit 26.
[0033]
The frequency analysis unit 23 analyzes the frequency of the sound (for example, the voice and
noise of the occupant) of the vehicle compartment input from the microphone 21 and digitized
by the A / D converter 22, and the voice conversion unit based on the analysis result 26 is a
device for adjusting the operation of the system.
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The frequency analysis unit 23 is realized as a normal microcomputer, and the CPU
(corresponding to a computer; not shown) of the microcomputer runs the program 100 shown in
FIG. 2 from the ROM (not shown) of the microcomputer. The above functions are realized by
reading out and repeatedly executing.
[0034]
Specifically, in executing the program 100, the CPU of the frequency analysis unit 23 first
acquires the sound data from the A / D converter 22 by a certain amount in step 110.
The amount to be acquired may be an amount for a fixed time, or may be an amount for a period
in which a sound at a certain sound pressure level or more continues.
[0035]
Subsequently, in step 120, analysis of frequency characteristics of the acquired time-series sound
data (that is, frequency analysis) is performed.
A specific method of frequency analysis is, for example, fast Fourier transform.
As a result of this frequency analysis, the frequency-intensity relationship of the acquired sound
is obtained.
[0036]
Subsequently, in step 130, it is determined whether frequency conversion is necessary.
Whether or not frequency conversion is necessary depends on the characteristic strength of a
certain frequency band (eg, average strength, square root of root mean square strength, weighted
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average strength, maximum strength, lowest strength) in the frequency-intensity relationship
acquired in step 120 Etc.) is determined based on whether or not the reference strength or more.
[0037]
Here, the certain frequency band refers to a band that is likely to be an obstacle to the guidance
voice output from the vehicle navigation device 1.
As such a frequency band, a constant band stored in advance may be used, or a band that
fluctuates based on various conditions (for example, the type of voice known to be output from
now on) may be used. Alternatively, a band whose boundary is randomly determined within a
certain range may be used.
Also, the reference strength may be a constant strength stored in advance, or may be a value that
fluctuates based on various conditions (for example, time, vehicle speed, traffic congestion
degree of a road, etc.) or a certain range. It may be a value determined randomly within.
[0038]
If frequency conversion is not required, then in step 140, a notification that conversion is
unnecessary is output to the speech conversion unit 26, and if necessary, step 150 is
subsequently performed.
[0039]
In step 150, the low level band is identified in the frequency-intensity relationship acquired in
step 120.
A prerequisite for being a low level band is that the band is low in strength compared to the
other bands.
In addition, as a requirement for the low level band, the condition that it is the average human
08-05-2019
9
audible band may be adopted.
Further, as a necessary condition for the low level band, a condition that the band is a
predetermined width including the frequency with the lowest intensity may be adopted.
[0040]
Subsequently, at step 160, the low level band identified at step 150 is notified to the speech
conversion unit 26.
After steps 140 and 160, one run of the program 100 ends.
[0041]
By executing such a program 100, the frequency analysis unit 23 notifies the voice conversion
unit 26 of the low level band specified based on the result of the frequency analysis of the input
sound data, if necessary.
[0042]
The voice converter 26 is a device for outputting the guidance voice data received from the
control circuit 19 to the D / A converter 25.
The audio data output to the D / A converter 25 is finally output as audio from the speaker 24
and reaches the occupant's ear.
However, when receiving the notification of the low level band from the frequency analysis unit
23, the voice conversion unit 26 receives the received voice so that the strength of the low level
band is further amplified using fast Fourier transform, inverse Fourier transform, or the like. Data
is converted, and audio data of the conversion result is output to the D / A converter 25.
Further, upon receiving the conversion unnecessary notification from the frequency analysis unit
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23, the sound conversion unit 26 outputs the received sound data to the D / A converter 25 as it
is.
The voice conversion unit 26 may be a microcomputer that executes a program for realizing the
functions as described above, or is a dedicated IC having a circuit configuration for realizing the
functions as described above. May be
[0043]
By the operation of each component as described above, the vehicle navigation device 1 analyzes
the frequency characteristic of the input voice, and based on the analysis result, outputs it to the
speaker when necessary, such as when there is a conversation in the vehicle The frequency
characteristic of the guidance voice to be made is adjusted to emphasize the low level band so as
to be easy to be heard in the inputted voice, and the guidance voice converted as a result of the
adjustment is outputted.
Therefore, the degree to which the guidance voice by the navigation device 1 for vehicles gets
mixed with other sounds and is hard to hear is reduced.
[0044]
In the first embodiment described above, the CPU of the frequency analysis unit 23 functions as
a frequency analysis unit by executing step 120 of the program 100, and executes the steps 130
to 160, thereby adjusting the frequency characteristic adjustment unit. Act as.
[0045]
Second Embodiment Next, a second embodiment of the present invention will be described.
FIG. 3 shows the hardware configuration of the vehicle navigation device 2 according to the
present embodiment.
As described in detail below, the vehicle navigation device 2 according to the present
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embodiment, based on the frequency characteristic information of the voice of the speaker
acquired by communication from the mobile phone, the frequency characteristic of the voice to
be output to the speaker It is adjusted to be easy to hear in the voice.
Furthermore, as described in detail below, the vehicle navigation device 2 according to the
present embodiment performs voice recognition by selectively using a voice recognition
dictionary in which the similarity to the feature information of the voice of the speaker acquired
from the mobile phone is higher than others. Is supposed to do.
[0046]
The vehicle navigation device 2 includes a position detector 11, an operation switch group 12, an
image display device 13, a RAM 16, a ROM 17, an external storage medium 18, a control circuit
19, a microphone 21, an A / D converter (A / D in FIG. , A speaker 24, a D / A converter (referred
to as D / A in the figure) 25, a voice conversion unit 26, a voice recognition unit 27, a
communication circuit 31, a frequency characteristic information acquisition unit 32, and a
dictionary selection unit 33. have.
In addition, the component to which the same code | symbol was attached | subjected in the
navigation apparatus 1 for vehicles of 1st Embodiment and the navigation apparatus 2 for
vehicles of this embodiment has mutually the same function, and, about these details here
Description of is omitted.
However, the external storage medium 18 of the present embodiment has a plurality of sets of
recognition dictionary data 41 to 43 in addition to the data possessed by the external storage
medium 18 of the first embodiment.
The recognition dictionary data 41 to 43 will be described later.
[0047]
The communication circuit 31 performs amplification, frequency conversion, demodulation, A / D
conversion, etc. on a predetermined communication standard (for example, Bluetooth, wireless
08-05-2019
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LAN, IrDA, serial communication, USB, etc.) for a signal from the mobile phone 50 received by an
antenna not shown. And the like, and outputs the result to the control circuit 19, the frequency
characteristic information acquisition unit 32, and the dictionary selection unit 33.
Further, the communication circuit 31 follows a predetermined wireless communication protocol
such as D / A conversion, modulation, frequency conversion, amplification, etc. for data input
from the control circuit 19, the frequency characteristic information acquisition unit 32, and the
dictionary selection unit 33. Processing, and the resulting signal is output to the above antenna.
[0048]
With such an operation, the communication circuit 31 communicates with the portable telephone
50 brought into the vehicle by the passenger in a wired or wireless manner based on the control
of the control circuit 19, the frequency characteristic information acquiring unit 32, and the
dictionary selecting unit 33. It can be carried out.
[0049]
The data transmitted from the mobile telephone 50 to the vehicle navigation device 1 by
communication are frequency characteristic information and speaker voice information.
The frequency characteristic information is data representing the average frequency
characteristic of the voice of the user of the portable telephone 50 as a frequency-intensity
relationship.
The portable telephone 50 is configured to repeatedly update such frequency characteristic
information based on the voice during the telephone call of the user.
The speaker voice information is data representing the feature amount (phoneme of each word,
prosody, frequency-intensity relationship) of the utterance of the user of the mobile phone 50 for
a plurality of specific words.
The mobile phone 50 has a voice recognition function, and based on the word specified by the
voice recognition, the speaker voice is obtained by repeatedly recording and updating the feature
08-05-2019
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quantity of the voice when the user emits the word. It is designed to store information.
[0050]
The frequency characteristic information acquisition unit 32 acquires the frequency
characteristic information of the voice of the speaker (that is, the user of the mobile telephone
50) from the mobile phone 50 using the communication circuit 31, and based on the acquired
information, It is a device for adjusting the operation. The frequency characteristic information
acquiring unit 32 is realized as a normal microcomputer, and when the CPU (corresponding to a
computer; not shown) of the microcomputer is connected to, for example, the mobile phone 50,
the ROM (not shown) of the microcomputer The above function is realized by reading and
executing the program 200 described in FIG.
[0051]
Specifically, when executing the program 200, the CPU of the frequency characteristic
information acquisition unit 32 first causes the communication circuit 31 to transmit a signal for
requesting the frequency characteristic information to the portable telephone 50 at step 210,
and the result is The frequency characteristic information received by the communication circuit
31 is acquired as
[0052]
Subsequently, at step 220, similar to step 150 of FIG. 2, the low level band is identified in the
frequency-intensity relationship indicated in the frequency characteristic information acquired at
step 210.
[0053]
Subsequently, at step 230, the information of the low level band identified at step 220 is notified
to the speech conversion unit 26, and then the execution of the program 200 is ended.
[0054]
By the operation of the communication circuit 31 and the frequency characteristic information
acquisition unit 32 as described above, the vehicle navigation device 2 acquires frequency
characteristic information of the voice of the speaker in the vehicle from the mobile phone 50,
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and based on the information, The frequency characteristic of the guidance voice to be output to
the speaker is adjusted to emphasize the low level band so as to be easy to hear in the input
voice, and the guidance voice converted as a result of the adjustment is output.
Therefore, the degree to which the guidance voice from the vehicle navigation device 2 is mixed
with the sound of the speaker in the vehicle and difficult to hear is reduced.
[0055]
In addition, the speech recognition unit 27 collates the speech recognition dictionary data in the
external storage medium 18 with the feature quantity of the input speech (phonology, prosody,
frequency characteristics, etc.), thereby representing the word represented by the input speech.
Are identified, and the data of the identified word is output to the control circuit 19.
One set of speech recognition dictionary data is composed of speech feature data corresponding
to each of a plurality of words (for example, words, vowels, etc.).
Here, the voice recognition dictionary data used by the voice recognition unit 27 is one or a
plurality of sets (specifically, selected from a plurality of sets of recognition dictionary data 41 to
43 stored in the external storage medium 18). The communication circuit 31 is a set of the
number of mobile phones connected at one time. Then, which voice recognition dictionary data is
to be used is determined according to the selection signal from the dictionary selection unit 33.
The voice recognition unit 27 realizes voice recognition of the voice input to the speaker 24. The
voice recognition unit 27 may be a microcomputer that executes a program for realizing the
above functions, or is a dedicated IC having a circuit configuration for realizing the above
functions. May be
[0056]
The dictionary selection unit 33 obtains speaker voice information of the voice of the speaker
(that is, the user of the mobile phone 50) from the mobile phone 50 using the communication
circuit 31, and uses the voice recognition unit 27 based on the obtained information. Device for
selecting speech recognition dictionary data. The dictionary selection unit 33 is realized as a
normal microcomputer, and when the CPU (corresponding to a computer; not shown) of the
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microcomputer is connected to, for example, the mobile phone 50, the ROM (not shown) of the
microcomputer The above functions are realized by reading and executing the program 300
described in FIG.
[0057]
Specifically, in executing the program 300, the CPU of the dictionary selection unit 33 first
causes the communication circuit 31 to transmit a signal for requesting speaker voice
information to the mobile phone 50 in step 310, and as a result thereof The speaker voice
information received by the communication circuit 31 is acquired.
[0058]
Subsequently, in step 320, the feature amount of the specific word indicated in the speaker voice
information acquired in step 310 and the specific word indicated in each of the recognition
dictionary data 41 to 43 in the external storage medium 18 The similarity is compared with the
feature amount of speech, and the recognition dictionary data with the highest similarity is
identified.
Here, as the similarity, for example, a correlation value of frequency characteristics may be used,
or a higher value may be used as the Euclidean distance between vector data indicating feature
quantities of phonemes and prosody is shorter.
[0059]
Subsequently, in step 330, a selection signal instructing to select the recognition dictionary data
specified in step 320 is output to the speech recognition unit 27. After step 330, execution of the
program 300 ends.
[0060]
By the operation of the voice recognition unit 27, the communication circuit 31, the dictionary
selection unit 33, etc. as described above, the vehicle navigation device 2 receives the speaker
voice information (corresponding to the feature information of the speaker's voice) from the
mobile phone 50. Since the voice recognition can be performed using the voice recognition
dictionary data acquired and having the highest similarity to the obtained speaker voice
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information, the accuracy of the voice recognition is compared to the case where a single set of
voice recognition dictionary is used. Improve.
[0061]
In the second embodiment described above, the CPU of the frequency characteristic information
acquisition unit 32 executes step 210 of the program 200 to function as frequency characteristic
information acquisition means, and executes steps 220 and 230. It functions as frequency
characteristic adjustment means.
Also, the CPU of the dictionary selection unit 33 functions as a speaker voice information
acquisition unit by executing step 310 of the program 300, and functions as a dictionary
identification unit by executing step 320. Further, the speech recognition unit 27 corresponds to
speech recognition means.
[0062]
(Other Embodiments) The embodiment of the present invention has been described above, but
the configuration of the present invention is not limited to the above embodiment, and various
modes capable of realizing the function of each component of the present invention Is included.
[0063]
For example, the control circuit 19 may perform the processing performed by the frequency
analysis unit 23, the speech conversion unit 26, the speech recognition unit 27, the frequency
characteristic information acquisition unit 32, and the dictionary selection unit 33.
[0064]
Furthermore, the frequency analysis unit 23, the frequency characteristic information acquisition
unit 32, and the dictionary selection unit 33 may be dedicated ICs having a circuit configuration
that realizes those functions.
[0065]
In addition, as a method of adjusting the guidance voice to be output to be easy to hear in the
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input sound, not only the method of increasing the strength of the low level band but also
uniformly shifting the frequency of the entire guidance voice The frequency band including the
peak of the strength of the guidance voice may be moved to the low level band.
That is, it is sufficient for the vehicle navigation device 1 to effectively use the low level band.
[0066]
Further, the frequency analysis unit 23 and the frequency characteristic information acquisition
unit 32 output weight data of each frequency to the speech conversion unit 26, and the speech
conversion unit 26 converts the strength of each frequency based on the weight data. It may be
like that.
[0067]
In addition, the external storage medium 18 has a guide voice pattern having a frequency
characteristic that makes it easy to hear in the sound of the frequency characteristic for each of a
plurality of typical frequency characteristics of ambient noise and noise. When some are stored,
the frequency analysis unit 23 performs analysis of the frequency characteristics of the input
voice by determining which of the typical frequency characteristics the input voice is closest to.
Alternatively, the adjustment of the frequency characteristic of the sound output from the
speaker 24 may be realized by causing the control circuit 19 to output a guidance sound of a
pattern corresponding to the closest frequency characteristic.
[0068]
Also, the speech recognition unit 27 of the second embodiment may have the function of the
frequency analysis unit 23 of the first embodiment.
[0069]
In addition, the processing of the program 200 and the program 300 may be performed every
time the portable telephone 50 is brought into the car, and transmission of data from the
portable telephone 50 may be performed, or when the portable telephone 50 is brought into the
car for the first time. It may be performed only once, and the word may read and use the
frequency characteristic information and the speaker's voice information received by the vehicle
navigation device 2 in the past each time the mobile phone 50 is brought into the car.
[0070]
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Further, in the above embodiment, the vehicle navigation devices 1 and 2 are exemplified as an
example of the navigation device of the present invention, but the navigation system of the
present invention is not limited to the vehicle navigation device. Can also be realized as a
portable navigation device that can be carried.
[0071]
It is a hardware block diagram of the navigation apparatus 1 for vehicles which concerns on 1st
Embodiment of this invention.
5 is a flowchart of a program 100 executed by the CPU of the frequency analysis unit 23.
It is a hardware block diagram of the navigation apparatus 1 for vehicles which concerns on 2nd
Embodiment of this invention.
7 is a flowchart of a program 200 executed by the CPU of the frequency characteristic
information acquisition unit 32.
It is a flowchart of the program 300 which CPU of the dictionary selection part 33 runs.
Explanation of sign
[0072]
1, 2: navigation device for vehicle, 11: position detector, 12: operation switch group, 13: image
display device, 16: RAM, 17: ROM, 18: external storage medium, 19: control circuit, 21:
microphone, 22 ... A / D converter, 23 ... frequency analysis unit, 24 ... speaker, 25 ... D / A
converter, 26 ... voice conversion unit, 27 ... speech recognition unit, 31 ... communication circuit,
32 ... frequency characteristic information acquisition unit, 33 ... dictionary selection unit, 41 to
43 ... recognition dictionary data, 50 ... mobile phone, 100 to 300 ... program.
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