JP2003219021A - On-vehicle hands-free phone and method for recognizing state of terminal thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an on-vehicle hands-free phone capable of surely recognizing a transition from a speech state to a waiting state in a silence state where a communication opposite party makes no utterance during a speech with a mobile terminal. <P>SOLUTION: A signal analysis section 4 detects the presence of a carrier from a signal received from a loop antenna 3 and transmitted from the mobile terminal (hereinafter abbreviated as a terminal) to a base station and analyzes whether a state is a communication state or a waiting state. A voice frequency/intermittent time analysis section 5 analyzes the frequency and the intermittent time of a voice signal received from an earphone jack of the terminal 2. A voice level analysis section 6 receives the voice signal from the earphone jack of the terminal 2 and outputs a signal denoting a communication state when the level exceeds a prescribed threshold value. A recognition processing section 7 receives results of the analysis by the signal analysis section 4, the voice frequency/intermittent time analysis section 5 and the voice level analysis section 6 to recognize a communication state with the speech opposite party, visually displays the result of recognition onto a display section 8 and audibly outputs the result to a speaker 9. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-vehicle hands-free telephone device, and more particularly to a state recognition function of a portable telephone terminal in an in-vehicle hands-free telephone device.

[0002]

2. Description of the Related Art Conventionally, it has been pointed out that the operation and communication of a mobile phone terminal while driving a vehicle hinders safe driving, and an in-vehicle hands-free phone device that can make a call without touching the mobile phone terminal even while driving is provided. Attention has been paid. The conventional vehicle-mounted hands-free telephone device shown in FIG. 2 is a hands-free unit including a mobile telephone terminal device 12, a hands-free adapter 13, a sound collecting microphone 14, a speaker 15, and a display 16. The mobile phone terminal 12, the sound collecting microphone 14, the speaker 15 and the display 16 are connected to the handsfree adapter 13 via respective dedicated connection cables, and the connection between the mobile phone terminal 12 and the handsfree adapter 13 is performed by the mobile phone. The terminal 12 is connected by an earphone jack.

Generally, the speaker 15 is fixed to the passenger side of the vehicle, the sound collecting microphone 14 is set in the passenger compartment so as to be connected to the sun visor on the driver's side, and the display 16 is provided.
Is not a hands-free display, but is usually used in combination with a navigation device (not shown) and is provided with not only a display function but also an input function for operating the mobile phone terminal 12. When making a hands-free call by making a call operation from the display device 16 or the mobile phone terminal 12, the call operation on the standby screen of the display device 16 or the call operation of the mobile phone device 12 is performed.
Is in the outgoing state.

At this time, the received voice from the mobile phone terminal 12 has a fixed cycle and a fixed intermittent state indicating the calling state, and the hands-free adapter 13 requests the display 16 to display the calling / calling state screen. After that, when the calling party responds, the mobile phone terminal 12 goes into a call state,
The received voice from the mobile phone terminal 12 becomes the voice or the silent state of the other party. At this time, the hands-free adapter 13 issues a call / call status screen display continuation request to the display 16.

When the portable telephone terminal 12 is changed from the standby state to the incoming state, the received voice from the portable telephone terminal 12 becomes a fixed cycle and a fixed intermittent state indicating the incoming state,
The hands-free adapter 13 requests the display 16 to display the incoming call status screen. After that, by responding from the mobile phone terminal 12 or the display unit 16, the mobile phone terminal 12 enters the call state, and the voice received from the mobile phone terminal 12 becomes the voice of the other party or the silent state. At this time, the hands-free adapter 13 makes a call / call status screen display request to the display 16.

When the line is disconnected while the mobile phone terminal 12 is in a call state, the received voice from the mobile phone terminal 12 is in a fixed cycle and a fixed intermittent state indicating a busy state, and the hands-free adapter 13 displays. The standby state screen display request is issued to the container 16. When the mobile phone terminal 12 hangs up the line in a call state, the voice received from the mobile phone terminal 12 becomes silent, and it is impossible to distinguish the call state and the standby state. Therefore, the hands-free adapter 13 detects the level of the received voice when the mobile phone terminal 12 is in the call state, and when it is in the silent state, monitors the duration of the silent state of the received voice to display the indicator. The screen request was made to make a call, continue the call, or wait.

[0007]

The above-described conventional vehicle-mounted hands-free telephone device can surely recognize the calling state, the incoming state, the busy state, and the calling state when the other party is speaking. However, it is impossible to reliably recognize whether the state of the mobile phone terminal is in a call state or in a standby state when there is no sound in a state where the other party does not speak during a call.

Further, Japanese Patent Laid-Open No. 2001-69228 discloses a hands-free device capable of recognizing a usage state of a telephone by detecting a carrier wave of a transmission signal transmitted from a telephone through an earphone microphone cable. It is disclosed. However, in the technique disclosed in this publication, the usage state of the telephone is recognized only by detecting the carrier wave, so that the detection itself in the silent state is possible.
There is a problem that detailed operations other than the polling at the time of waiting and the call / waiting of the mobile phone cannot be recognized. An object of the present invention is to reliably recognize a transition from a call state to a standby state during a silent state where the other party does not speak during a call on a mobile phone terminal, and to perform polling during standby and call of a mobile phone. -To provide an on-vehicle hands-free telephone device capable of recognizing detailed operations other than standby and a terminal state recognition method thereof.

[0009]

A vehicle-mounted hands-free telephone device of the present invention comprises a loop antenna for receiving a signal transmitted from a mobile telephone terminal to a base station, and a signal input from the loop antenna. A signal analysis means for analyzing the presence or absence of a carrier wave, and a recognition processing means for recognizing the communication state with the other party on the basis of the output of the signal analysis means and the monitoring output of the received voice of the mobile phone terminal are provided.

The vehicle-mounted hands-free telephone device of the present invention comprises a mobile telephone terminal for making a call, a loop antenna for receiving a signal transmitted from the mobile telephone terminal to a base station, and the loop antenna. A signal analysis unit that detects the presence or absence of a carrier wave from the input signal and analyzes whether it is in communication or in standby, and the frequency and interruption time of the audio signal input from the earphone jack of the mobile phone terminal. A voice frequency / interruption time analysis unit that analyzes the voice signal, and inputs a voice signal from the earphone jack of the mobile phone terminal, determines whether the level exceeds a predetermined threshold value, and exceeds the predetermined threshold value. The voice level analysis unit that outputs a signal indicating that the standby state is no longer present, the signal analysis unit, the voice frequency / interruption time analysis unit, and the front The recognition processing unit includes a recognition processing unit that receives the analysis result of the voice level analysis unit, recognizes the communication state with the other party and performs corresponding processing, and a display unit that visually displays the recognition result of the recognition processing unit. It may be configured to include a speaker that audibly outputs the recognition result of 1.

A method of recognizing a state of a mobile phone terminal in a vehicle-mounted hands-free phone device according to the present invention receives a signal transmitted from the mobile phone terminal to a base station by a loop antenna and analyzes the presence or absence of a carrier wave. By analyzing the level and frequency components of the received voice of the mobile phone terminal, the state of communication with the other party of communication is determined, and the result is visually displayed or audibly output.

A method for recognizing a state of a mobile phone terminal in an in-vehicle hands-free telephone device of the present invention is a loop antenna for transmitting a signal transmitted from a mobile phone terminal for communication installed in the in-vehicle hands-free telephone device to a base station. Is received from the loop antenna, the presence or absence of a carrier wave is detected from the signal input from the loop antenna, it is determined whether communication is in progress or in standby, and a first determination result is output. From the earphone jack of the mobile phone terminal It is determined whether or not the voice level of the received voice signal exceeds a predetermined threshold value, and when the voice level exceeds the predetermined threshold value, a second determination result indicating that the standby state is removed is output, The frequency and the interruption time of the received voice signal from the earphone jack of the mobile phone terminal are analyzed, and the third determination result indicating the state is output,
The configuration is such that the communication state with the communication partner is discriminated from the first, second, and third determination results, and the result is visually displayed, and the determination result of the communication state may be audibly output. It may be configured to output.

According to the present invention, the vehicle-mounted hands-free telephone device receives the transmission signal transmitted from the portable telephone terminal to the base station, in addition to monitoring the received voice from the conventional portable telephone terminal. By providing the loop antenna and the signal analysis unit that analyzes whether or not a carrier wave exists in the input from the loop antenna, it is possible to reliably grasp the details of the communication state.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings.

Referring to FIG. 1, an in-vehicle hands-free telephone device 1 includes a mobile phone terminal 2 for making a call and a loop antenna for receiving a signal transmitted from the mobile phone terminal 2 to a base station. 3, and a signal analysis unit 4 that detects the presence or absence of a carrier wave from the signal input from the loop antenna 3 and analyzes whether it is in communication or in standby.
A voice frequency / interruption time analysis unit 5 that analyzes the frequency and the interruption time of an audio signal input from the earphone jack of the mobile phone terminal 2, and an audio signal is input from the earphone jack of the mobile phone terminal 2 and its level is predetermined. A voice level analysis unit 6 that determines whether or not the threshold value is exceeded and outputs a signal indicating that the standby state is no longer present when the threshold value is exceeded, the signal analysis unit 4, the voice frequency / intermittent A recognition processing unit 7 that receives the analysis results of the time analysis unit 5 and the voice level analysis unit 6, recognizes the communication state with the other party and performs corresponding processing, and a display unit 8 that visually displays the recognition result of the recognition processing unit 7. With. Further, in order to notify the recognition result of the recognition processing unit 7 in a more understandable manner, the speaker 9 for audible output may be provided. It should be noted that the sound collecting microphone for transmission is not shown. In addition, the loop antenna 3 can be configured at a low cost because it does not require a tuning circuit by being installed near the mobile phone terminal.

Next, the operation of the present invention will be described with reference to FIG.

The loop antenna 3 analyzes the signal (electric field) transmitted from the mobile phone terminal 2 to the base station by the signal analysis unit 4.
Then, the signal analysis unit 4 analyzes the frequency and detects the presence or absence of a carrier wave. As a result, when the carrier wave exists, the operation is recognized as being in communication, and when the carrier wave does not exist, the waiting operation is recognized and the recognition processing unit 7 is notified.

The voice level analysis unit 6 is used for the mobile phone terminal 2.
The received voice level from the earphone jack is detected, and if it is higher than a certain threshold, the recognition processing unit 7 is notified. The recognition processing unit 7 receives the signal from the voice level analysis unit 6 to recognize that the state of the mobile phone terminal 2 is not in the standby state, that is, that the communication partner is in communication. To do.

The voice frequency / interruption time analysis unit 5 analyzes the frequency of the voice received from the earphone jack of the mobile phone terminal 2 and the interruption time, and is transmitting, receiving, busy (busy), and the like. Four types of motion recognition are performed and the recognition processing unit 7 is notified. For example, when 400 Hz is continuous, it is recognized as an outgoing call, and when 2000 Hz, 16 Hz continues for 1 second and 2 seconds OFF, it is recognized as an incoming call.
When 0 Hz is ON for 0.5 seconds and OFF for 0.5 seconds, it is recognized as busy.

When the recognition processing unit 7 determines that the signal from the voice level analysis unit 6 is other than the standby state, the recognition processing unit 7 uses the signal from the voice frequency / interruption time analysis unit 5 to make a call, receive a call, talk, or talk. By performing the four types of recognition, the mobile phone terminal 2 monitors and detects that the mobile phone terminal 2 transits from a standby state to another state. When the recognition processing unit 7 recognizes that a call is in progress, the recognition processing unit 7 uses the signal from the voice level analysis unit 6 and the signal from the signal analysis unit 4 to switch between the call continuation and the call-to-standby transition.
It is possible to recognize the type.

The recognition processing unit 7 may display the recognition result of the communication state on the display unit 8 as a character or as an image such as an illustration. For easier understanding, a predetermined voice message may be output to the speaker 9 in advance.

[0022]

As described above, according to the present invention, in a hands-free vehicle-mounted telephone device that is connected to an earphone jack of a mobile phone terminal, the call is transmitted from the call during a silent time when the other party is silent during the call. The transition to the standby state can be surely recognized. Further, it becomes possible to perform polling during standby and recognition of detailed operations of the mobile phone other than call / standby.

[Brief description of drawings]

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

FIG. 2 is a diagram showing a configuration example of a conventional hands-free telephone device.

[Explanation of symbols]

1 In-vehicle hands-free telephone device 2 Mobile phone terminals 3 loop antenna 4 Signal analysis section 5 Voice frequency / intermittent time analysis unit 6 Voice level analysis unit 7 Recognition processing unit 8 Display 9 speakers

Claims (7)

[Claims] 1. A loop antenna for receiving a signal transmitted from a mobile phone terminal to a base station, a signal analysis means for analyzing the presence or absence of a carrier wave from a signal input from the loop antenna, and the signal analysis. An in-vehicle hands-free telephone device, comprising: recognition processing means for recognizing and processing the communication state with the other party on the basis of the output of the means and the monitoring output of the received voice of the mobile phone terminal. 2. A mobile phone terminal for making a call, a loop antenna for receiving a signal transmitted from the mobile phone terminal to a base station, and a carrier wave from a signal input from the loop antenna. A signal analysis unit that detects the presence / absence and analyzes whether it is in communication or in standby, and a voice frequency / interruption time that analyzes the frequency and the interruption time of the audio signal input from the earphone jack of the mobile phone terminal. An audio signal is input from the analysis unit and the earphone jack of the mobile phone terminal, and it is determined whether or not the level exceeds a predetermined threshold value. When the level exceeds the predetermined threshold value, the standby state is stopped. Receiving the analysis result of the audio level analysis unit that outputs a signal indicating that, the signal analysis unit, the audio frequency / interruption time analysis unit, and the audio level analysis unit. An in-vehicle hands-free telephone device, comprising: a recognition processing unit that recognizes a communication state with a call partner and performs corresponding processing; and a display unit that visually displays a recognition result of the recognition processing unit. 3. The vehicle-mounted hands-free telephone device according to claim 2, further comprising a speaker that outputs the recognition result of the recognition processing unit in an audible manner. 4. A method for recognizing a state of a mobile phone terminal in an in-vehicle hands-free phone device, wherein a signal transmitted from the mobile phone terminal to a base station is received by a loop antenna and the presence or absence of a carrier wave is analyzed. By analyzing the level and frequency component of the received voice of the mobile phone terminal, the state of communication with the other party of the call is determined, and the result is visually displayed or audibly output. Telephone terminal status recognition method. 5. A method for recognizing a state of a mobile phone terminal in an in-vehicle hands-free telephone device, wherein a signal transmitted from a mobile phone terminal for communication installed in the in-vehicle hands-free telephone device to a base station is looped. The earphone jack of the mobile phone terminal, which receives the signal from the antenna, detects the presence or absence of a carrier wave from the signal input from the loop antenna, determines whether the carrier is in communication or is in the standby state, and outputs the first judgment result. Determines whether or not the voice level of the received voice signal from exceeds a predetermined threshold value, and outputs a second determination result indicating that it is not in the standby state when the voice level exceeds a predetermined threshold value, Analyzing the frequency and the interruption time of the received voice signal from the earphone jack of the mobile phone terminal and outputting the third determination result indicating the state;
A method for recognizing a state of a mobile phone terminal in a vehicle-mounted hands-free telephone device, characterized in that the communication state with a communication partner is discriminated from the first, second, and third determination results, and the result is visually displayed. 6. The method for recognizing the state of a mobile phone terminal in an in-vehicle hands-free telephone device according to claim 5, wherein the result of discrimination of the communication state is audibly output. 7. The method for recognizing a state of a mobile phone terminal in an in-vehicle hands-free telephone device according to claim 5, wherein the result of discrimination of the communication state is output as an image.