JPH11353587A - Navigation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a navigation system which easily acquires traffic information in a desired region to recognize whatener it is voice or characters. SOLUTION: A radio receiver and a voice recognition system are mounted on a navigation system on vehicle, and a monitor screen for character information display is prepared. Information of the center coordinate value, the broadcasting range, the road name, the reception frequency, etc., of a road information radio station broadcast in a specific region is recorded in a CD-ROM player of the navigation system; and when a system user enters the recorded broadcasting range, reception of a road information radio is started with the recorded reception frequency. With respect to received road traffic information, the voice recognition system is used to convert the reception voice to characters, and they are displayed on the monitor screen or spoken from a speaker 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-vehicle navigation system, and more particularly to a navigation system which can easily obtain traffic information of a desired area and can recognize both of voice and text.

[0002]

2. Description of the Related Art In a conventional on-vehicle navigation device, as a means for taking in road traffic information, there is a means for receiving a text multiplex broadcast of FM multiplex broadcasting in Japan to obtain information.

[0003]

The means for taking in the text information of the FM multiplex broadcasting takes a lot of time to obtain only the information near the user's current location because the information range is wide, and furthermore, the necessary information is May be missed.

[0004] In Europe, traffic information is recorded in a RAM (memory) inside the audio of a vehicle-mounted audio in a currently used mode (CD, cassette tape, etc.), and the information is recorded when it is desired to listen. There is a system that you can listen to.

[0005] In this system, since a signal that "this broadcast is traffic information" is transmitted from the broadcast station,
Although only traffic information can be recorded, since there is no such system in Japan, information cannot be obtained unless the user tunes the frequency of the broadcasting station as the reception frequency by himself / herself.

Systems such as FM multiplexing and traffic information recording described above require specific cooperation from the broadcasting station because they are specific broadcast information, and cannot use only conventional radio broadcasting.

[0007] The present invention has been made in view of the above points, and an object of the present invention is to provide a navigation system capable of easily acquiring traffic information in a desired area and recognizing both of voice and text. .

[0008]

SUMMARY OF THE INVENTION (1) In order to solve the above-mentioned problems, the present invention provides a position detecting means provided in a moving body for detecting the position of the moving body, and a radio broadcast station for broadcasting traffic information. Recording means for recording information on a position, a broadcast range, a reception frequency, and the like; a receiver capable of receiving the traffic information; and a position of a moving object detected by the position detection means, which is recorded on the recording means. A control unit that causes the receiver to perform a receiving operation when the receiver is located within a receivable area of the radio broadcast station, and an information conversion unit that performs speech recognition on the traffic information received by the receiver and converts the traffic information into text information. And displaying the character information converted by the information conversion means.

Further, the information conversion means performs speech recognition using synthesized speech data used in traffic information broadcasting, and the electric field strength at the time of reception varies according to the reception performance of the receiver. Characterized in that the operation is started when the value is equal to or greater than the set speech recognizable value, and that the device has a function of performing speech recognition after confirming a start sound of the received traffic information, The converted character information is stored, and the information received at the n-th time is received by the (n-1) -th time and compared with the stored information.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. In order to construct the system of the present invention, for example, as shown in FIG. 1, an in-vehicle navigation system 1, a monitor screen 2, a radio receiver, a voice recognition system (information conversion means), and the like are required. In the present embodiment, the radio receiver and the voice recognition system are mounted on the navigation system 1. The navigation system 1 is, for example, a position detecting means for detecting the position of the own vehicle by a GPS (global positioning system), a recording / reproducing unit capable of storing and reproducing map and road information, for example, a CD-ROM player, and corresponds to position information. It is composed of a map stored in a CD-ROM player, a display for displaying road information, and the like.

There is a road information radio that broadcasts only to a specific area or road on roads throughout Japan (for example,
Fast on the road, and the reception frequency 1620KH _Z at about 2Km only such receivable of traffic received radio). In the present invention, information such as the center coordinate value of the area where the road information radio is broadcast, the broadcast range, the road name, the reception frequency and the like are recorded on the CD-ROM player of the navigation system 1, and the system user can use the information. When the vehicle enters the recorded broadcast range, reception of the road information radio is started at the recorded reception frequency. Then, the received road traffic information is displayed on the monitor screen 2 after converting the received voice into characters using a voice recognition system.

In this case, the radio receiver required for reception is
The function of the on-vehicle audio device mounted on the navigation system 1 and used by the user is not hindered while receiving the road information radio.

FIGS. 2A and 2B are functional block diagrams of the present embodiment. FIG. 2A shows an automatic traffic information receiving block, and FIG. 2B shows a voice-to-character converting block. Block 11
When the position of the vehicle is confirmed by, for example, GPS, the vehicle position is determined in block 12 to be consistent with the position information of the broadcast range of the road information radio recorded in the CD-ROM player. It is confirmed. If they match, block 13 starts receiving the road information radio.

Next, the road information based on the voice received by the tuner block 21 is uttered from the speaker 30 and is voice-recognized by the voice recognition block 22. Then, the speech recognition data is converted into character information in block 23, and is displayed on the monitor screen 2 in block 24.

[0015] The display monitor includes an in-vehicle audio system, a video system, a navigation system, and an F used by a user.
Any display device that can be used in a car, such as M-multiplexing, can be used.

Since most of the transmitted voice of the road information radio is a synthesized voice at present, by having the synthesized voice data as voice recognition data in addition to the conventional general recognition data, the voice recognition speed is increased and the character conversion time is increased. Information can be quickly conveyed to the user. In the present invention, the process from receiving information → voice recognition → character conversion → character display is set to a maximum of one second or less.

The above system allows the user to choose between capturing with textual information (block 24), capturing with audio information (speaking by speaker 30), or using both text and audio, In addition, this function may not be used when unnecessary. Also, when the reception is started and it is recognized that there is no traffic information as traffic information and it is determined that it can be displayed as character information, the user is notified of the reception by a beep sound, blinking light, or the like. .

In another embodiment of the present invention, after the start of the reception, the reception status is checked with an S-meter that has been converted into a voltage, and the value is determined based on the reception performance of the radio receiver used. A value that can be recognized is determined, and when the value is equal to or greater than the S meter value, character conversion is started for the first time. If data that cannot be converted, such as noise, comes in for some reason while receiving, *
Display it in such as to clarify that it could not be recognized.

In another embodiment of the present invention, after the start of reception, the received content is not the traffic information recorded on the CD-ROM player, so that the beginning of the traffic information repeatedly broadcasted Since the start sound is played, after recognizing the start sound, the information is subjected to voice recognition to display characters.

Further, as another embodiment of the present invention, after confirming the beginning of the traffic information, as shown in FIG.
The information of the second time is stored in the memory, and is converted into character information from the second time (however, in this case, 1
Character conversion may be performed from the first time). Then, the contents of the first time and the contents of the second time are always compared. If the information of the second time is noise or the like and the information of the first time is audio information, the first data is used for the portion where the noise was present. For the third and subsequent times, the previously displayed character information is stored in the memory and compared with that. Thereby, more accurate character information can be displayed.

[0021]

As described above, according to the present invention, a position detecting means provided on a moving body for detecting the position of the moving body, a position, a broadcast range, a receiving frequency, etc. of a radio broadcasting station for broadcasting traffic information are provided. Recording means for recording information related to the traffic information, a receiver capable of receiving the traffic information, and a position of the moving object detected by the position detecting means, wherein a receivable area of a radio broadcast station recorded in the recording means is recorded. When present in, the control unit that performs the receiving operation of the receiver, and an information conversion unit that converts the traffic information received by the receiver to speech information by speech recognition, and is converted by the information conversion unit Since the displayed character information is displayed, the following excellent effects can be obtained.

(1) Traffic information can always be obtained in a specific area where road and traffic information is broadcast.

(2) Traffic information can be obtained without interrupting the use of a radio, CD, cassette tape, or the like in use.

(3) The user does not have to set the radio frequency by himself.

(4) Since the information is displayed as text information, even the hearing impaired can immediately know the traffic information of the area.

(5) Since speech recognition is performed, a conventional radio broadcast can be received instead of an FM multiplex signal and converted into a text broadcast.

(6) By incorporating the synthesized speech data being broadcast into the speech recognition data, quick recognition becomes possible.

(7) When the reception situation is bad, no reception is made, so that the user is not uncomfortable.

(8) By using a memory for the radio, information that is repeatedly broadcast, such as traffic information,
Furthermore, character conversion can be performed more accurately, and correct information can be given to the user.

(9) Both text and voice can be used, which is very convenient.

(10) Since no equipment other than the navigation system and the monitor is required, the space in the vehicle can be effectively used.

[Brief description of the drawings]

FIG. 1 is a block diagram of hardware showing an embodiment of the present invention.

FIG. 2 is a functional block diagram showing an embodiment of the present invention.

FIG. 3 is an explanatory diagram showing another embodiment of the present invention when a memory is used.

[Explanation of symbols]

 1. Navigation system 2. Monitor screen 30. Speaker

Claims (16)

[Claims] 1. A position detecting means provided on a moving body for detecting a position of the moving body, a recording means for recording information on a position, a broadcast range, a receiving frequency, and the like of a radio broadcast station for broadcasting traffic information; A receiver capable of receiving traffic information, and when the position of the moving object detected by the position detecting means is within a receivable area of a radio broadcast station recorded in the recording means, the receiver A control unit for performing a receiving operation; and an information conversion unit configured to perform voice recognition on the traffic information received by the receiver and convert the traffic information into character information, and display the character information converted by the information conversion unit. Navigation system. 2. The navigation system according to claim 1, wherein said information conversion means performs voice recognition using synthesized voice data used in traffic information broadcasting. 3. The operation of the information conversion means when the electric field strength at the time of reception is equal to or higher than a voice recognizable value set according to the reception performance of the receiver. Item 2. The navigation system according to item 1. 4. The information conversion means starts operation when the electric field strength at the time of reception is equal to or higher than a value that can be recognized by a voice set according to the reception performance of the receiver. The navigation system according to claim 2. 5. The navigation system according to claim 1, wherein the information conversion unit has a function of performing voice recognition after confirming a start sound of the received traffic information. 6. The navigation system according to claim 2, wherein the information conversion means has a function of performing voice recognition after confirming a start sound of the received traffic information. 7. The navigation system according to claim 3, wherein the information conversion means has a function of performing voice recognition after confirming a start sound of the received traffic information. 8. The navigation system according to claim 4, wherein the information conversion means has a function of performing voice recognition after confirming a start sound of the received traffic information. 9. The information conversion means stores the converted character information, receives the information received at the n-th time by the (n-1) -th time, and compares the received information with the stored information. The navigation system according to claim 1. 10. The information conversion means stores the converted character information, receives the n-th received information up to the (n-1) -th time, and compares the received information with the stored information. The navigation system according to claim 2. 11. The information conversion means stores the converted character information, receives the information received at the nth time by the (n-1) th time, and compares the received information with the stored information. The navigation system according to claim 3. 12. The information conversion means stores the converted character information, receives the information received at the n-th time by the (n-1) -th time, and compares the received information with the stored information. The navigation system according to claim 4. 13. The information conversion means stores the converted character information, receives the n-th received information by the (n-1) -th time, and compares the received information with the stored information. The navigation system according to claim 5. 14. The information conversion means stores the converted character information, receives the information received n times by n-1 times, and compares the received information with the stored information. The navigation system according to claim 6. 15. The information conversion means stores the converted character information, receives the information received at the n-th time by the (n−1) -th time, and compares the received information with the stored information. The navigation system according to claim 7. 16. The information conversion means stores converted character information, receives information received n times by n-1 times, and compares the received information with the stored information. The navigation system according to claim 8.