JPS6374744A - Voice input device for on-vehicle electronic equipment - Google Patents

Abstract

PURPOSE:To easily change a system by instal ling a voice recognizing means which compares the input voice signal with the previously recorded voice data and recognizes the operation instruction for the pertinent electronic equipment onto a plurality of electronic equipment into which the voice signal supplied from a voice input means is input. CONSTITUTION:When the operation instructions for a plurality of electronic equipment M1a-M1n mounted onto a car are input by voice, a voice input means M2 which converts the voice which a driver gives into electric signals and outputs is installed. The voice signal outputted from the voice input means M2 is transmitted into each electronic equipment M1a-M1n through a transmission line M3. Voice recognizing means M4a-M4n which compare the transmitted voice signal with the previously recorded voice data and recognize the operation instruction of the pertinent electronic equipment are installed into each electronic equipment M1a-M1n. Therefore, the system can be easily changed when the operated electronic equipment is changed or added.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a voice input device for in-vehicle electronic equipment that inputs command signals by voice for operating various electronic equipment mounted on a vehicle.

[Prior Art] In recent years, vehicles have been equipped with air conditioners, navigators, radio tuners, cassette decks, compact disc players, etc.
It is equipped with a large number of electronic devices, and there are many switches around the driver's seat to operate these devices. Therefore, in order to operate a desired device, it is necessary to select and operate the appropriate operation switch from among a large number of switches, which poses a problem of poor operability.

In addition, if the driver operates the vehicle while driving, the driver's attention to traffic conditions may decrease, and in some cases, it may become dangerous.

Therefore, as described in Japanese Patent Application Laid-Open No. 58-70293, for example, it has been considered to use a voice recognition device to enable electronic devices installed in a vehicle to be operated by the voice emitted by the vehicle occupant. .

[Problems to be Solved by the Invention] However, in the above-mentioned conventional device, a voice input section equipped with a microphone or the like recognizes an operation command given by a vehicle occupant's voice, and the corresponding electronic device is activated in accordance with the recognized command. It outputs a driving signal. Therefore, when a new device is added to an existing system, the voice input section must also be replaced with a new device, which poses a problem in that it takes time and effort to expand the system. In other words, conventionally, the audio input unit is configured to recognize audio signals input through a microphone, etc., so it is necessary to install new equipment on the vehicle and make it possible to operate it by voice. It was necessary for the voice input section to be able to recognize operation commands for this device from the voice emitted by vehicle occupants, and it was necessary to replace the voice recognition section with a new one.

Therefore, the present invention not only allows various electronic devices mounted on a vehicle to be operated by voice emitted by vehicle occupants, but also allows the system to be easily changed when changing or adding electronic devices to be operated. The purpose was to provide a voice input device for in-vehicle electronic equipment.

[Means for solving the problems] That is, the configuration of the present invention made to achieve the above object is as follows:
For example, as shown in FIG. 1, there is a voice input device for in-vehicle electronic equipment that inputs operation commands for a plurality of electronic devices M1a to M1n mounted on a vehicle by voice, and inputs voice emitted by a vehicle occupant. a voice input means M2 that converts the voice into an electrical signal and outputs it; and a voice input means M
The audio signal outputted from 2 is transmitted to the plurality of electronic devices M1a.
- a transmission line M3 that transmits to M1n; and a transmission line M3 that is provided in each of the plurality of electronic devices M1a to M1n, and compares the audio signal transmitted via the transmission line M3 with pre-recorded audio data to the electronic device. The gist of the present invention is a voice input device for an in-vehicle electronic device, characterized by comprising voice recognition means M4a to M4n for recognizing operation commands.

Here, the audio input means M2 converts the audio signal emitted by the vehicle occupant into an electrical signal and outputs it. For example, the audio input means M2 converts the audio signal emitted by the vehicle occupant into an electrical signal using a microphone etc. Sample the signal and perform A/
It may be configured to perform D conversion and output as a digital signal. In addition, in order to recognize that the voice emitted by the vehicle occupant is a predetermined command signal by the voice recognition means M4a to M4n,
Since it is necessary to analyze the A/D converted audio signal and extract its characteristic parameters, the audio input means M
On the second side, an audio signal inputted using a microphone or the like may be analyzed to extract feature parameters, and the extracted feature parameters may be output as an audio signal.

Next, the voice recognition means M4a to M4n are installed in various electronic devices M1a to M2n installed in the vehicle, respectively, and from the voice signals outputted from the voice input means M2, drive commands for the electronic devices installed therein. The apparatus is configured to output an A/D-converted audio signal from the audio input means M2, and extracts feature parameters from the audio signal, and uses the extraction results as preset parameters. It is only necessary to recognize the drive command by comparing it with voice data, and in a device configured to extract characteristic parameters by analyzing the voice signal A/D converted by the voice input means M2, the voice input means M2 The drive command may be recognized by comparing the voice signal from the driver with preset voice data.

In addition to the above-mentioned air conditioners, navigators, radio tuners, cassette decks, and compact disc players, electronic devices for which drive commands can be issued using the voice input device include wipers, headlights, and various devices that control vehicle height. can be mentioned.

[Function] In the voice input device for in-vehicle electronic equipment of the present invention configured as described above, the voice emitted by the vehicle driver is converted into an electrical signal by the voice input means M2, and the converted voice signal is Each electronic device Mla-M1 via transmission line M3
It is transmitted to the voice recognition means M4a to M4n provided in the voice recognition means M4a to M4n provided at the voice recognition means M4a to M4n. Each of the voice recognition means M4a to M4n recognizes a drive command for the electronic device provided with the voice recognition means from the output voice signal.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

First, FIG. 2 is a block diagram showing the overall configuration of various electronic equipment control systems to which the voice input device of the present invention is applied.

As shown in the figure, in this embodiment, the voice emitted by the vehicle occupant is inputted to the voice input section 4 through the microphone 2, and the voice is A/D converted by the voice input section 4, and the voice is input to various electronic devices, i.e., Each of these electronic devices 6 to 16 is connected to a car phone 6, a radio tuner 8, a compact disc player (hereinafter referred to as a CD player) 10, a cassette deck 12, a navigation device 14, and a direction detection device 16.
and the audio input section 4 are connected via a transmission line 18.

An audio reproduction section 20 is also connected to this transmission line 18, and converts audio signals reproduced by the CD player 10 and cassette deck 12 and audio signals received by the car phone 6 and radio tuner 8 into digital signals and 1). Transmission line 18
The audio signal is converted into an analog signal by an audio reproducing section 20 and can be reproduced by a speaker 22.

Here, the audio input section 4 includes a microphone 2, as shown in FIG.
The audio signal emitted by the vehicle occupant is converted into an analog signal by the amplifier 4a, and the amplified audio signal is passed through the low-pass filter 4b, sample hold circuit 4c, and A/
The audio signal is converted into a digital signal at a sampling period according to the clock signal outputted from the clock signal generation circuit 4e and inputted via the D converter 4d, and the audio signal is converted into a serial signal and sent via the interface 4f. It outputs onto the transmission line 18, and includes the above-mentioned amplifier 4a, low-pass filter 4b, sample-and-hold circuit 4C, A/D converter 4d, clock signal generation circuit 4e, and interface 4f, as well as the well-known CPU 4g and ROM 4h. , RAM4
i, a DMA controller 4j, and a serial controller 4k.

In the CPU 4 CJ, voice input processing is executed in accordance with the procedure shown in FIG. 4, and the operations of the above-mentioned parts are controlled.

That is, in this voice input process, it is first determined in step 100 whether or not voice input has started via the microphone 2, and the voice is input by repeatedly executing step 100 until voice input is started. wait until When there is an audio input, the process moves to the next step 110, where the audio signal converted into a digital signal by the A/D converter 4d is input and temporarily recorded in the RAM 41.

Next, in step 120, it is determined whether or not the voice input has ended, and if the voice input has not ended, the next step 13 is performed.
0, and it is determined whether it is the current sampling timing of the audio signal.

If the current sampling timing is reached, the process moves to step 110 again; if not, the process proceeds to step 130.
Execute repeatedly and wait for the sampling timing.

In other words, in this embodiment, the audio signal input via the low-pass filter 4b is temporarily held in the sample and hold circuit 4C at the sampling period determined by the clock signal from the clock signal generation circuit 4e, and then Since A/D conversion is performed by A/D converter 4d, the A/D converted value from A/D converter 4d, that is, the audio signal, is input at this sampling period.

If it is determined in step 120 that the audio input has ended, step 140 is executed, and the audio signal read and recorded in steps 100 to 130 is output to the serial controller 4k and converted into a serial signal. and add information necessary for transmission to the signal (e.g.
address information, error detection information, etc.) and output it onto the transmission line 18.

In this way, the audio input section 4 samples the audio signal input through the microphone 2 at a predetermined sampling period, performs A/D conversion, and converts the A/D converted audio signal into a serial signal through the transmission line. It will be output on 18.

Next, the audio reproduction section 20 is configured as shown in FIG.

As shown in the figure, the audio playback unit 20, like the audio input unit 4, is used to exchange data between the transmission line 18 and the audio playback unit 20, and to perform input/output control of various data. , an interface 20a, a serial controller 20b1, and a DMA controller 20G, and a CPU 20d, a ROM 20e1, and a RAM for processing signals on the transmission line 18 inputted via the interface 20a and the serial controller 20b.
Equipped with 2 Of.

Further, when the input signal is an audio signal from a source other than the audio input unit 4, such as a car phone 6 or a radio tuner 8, the audio signal can be reproduced by the speaker 22.
A clock signal generation circuit 209, a D/A converter 20h, a low-pass filter 201, and an amplifier 20j are provided.

Note that a plurality of formant frequency data representing audio data for driving the audio reproduction unit 20 are recorded in the ROM 2Oe, and the formant frequency data obtained by analyzing the audio signal output from the audio input unit 4 and By comparing the signals, it is possible to determine whether or not the voice input by the vehicle occupant through the voice input section 4 is a command signal for operating the voice reproduction section 20.

In the audio reproduction section 20 of this embodiment configured in this way,
A signal flowing to the transmission line 18 is inputted via the interface 20a and the serial controller 20b, and the CPU
20d, if the signal is an audio signal output from the audio input section 4, the signal is analyzed and a command signal for operating the audio reproduction section 20 is extracted, and the signal is output from a device other than the audio input section 4. If the audio signal is an analog signal, an audio signal reproduction process is executed in which the audio signal is converted into an analog signal and reproduced by the speaker 22. This audio signal reproduction process will be explained below with reference to the flowchart shown in FIG.

As shown in the figure, when the audio signal reproduction process is started, step 200 is first executed to determine whether or not the signal flowing through the transmission line 18 has been taken into the RAM 2Oe, that is, the transmission line 1
8 is completed. When the reception is completed, the next step 205 is executed and it is determined whether the read signal is the audio signal output from the audio input section 4 or not. This judgment is made by the voice input section 4.
This is executed based on information such as address information given when outputting an audio signal from the audio input section 4, and if this signal is from the audio input section 4, the process moves to the next step 210.

In step 210, the input audio signal from the audio input section 4 is subjected to fast Fourier transform, and in the next step 215, the frequency of the converted audio signal is analyzed to extract characteristic parameters. In the subsequent step 220, this extracted characteristic parameter is compared with one of the formant frequency data representing the drive command for the audio reproduction section 20 recorded in advance in the ROM 20e, and the next step 225 is performed.
Then, it is determined whether or not these respective data match, that is, whether or not the voice emitted by the vehicle occupant is a command signal for operating the voice reproduction section 20.

Next, if it is determined in step 225 that the feature parameter obtained by analyzing the audio signal does not match one of the formant frequency data recorded in advance in the ROM2Od, the process moves to the next step 230, and the process proceeds to step 220 and In step 225, it is determined whether all formant frequency data recorded in the ROM 2Oe have been compared, and if there is any formant frequency data that has not been compared, the process moves to step 220 again. In other words, step 22 above
0 and step 225 are executed for all formant frequency data recorded in the ROM2OCI. Then, the input audio signal is not a command signal for operating the audio playback section 20, but the ROM 2Oe
If the formant frequency data does not match all of the formant frequency data recorded within, the processing of this routine is immediately terminated.

On the other hand, if it is determined in step 225 that the audio signal from the audio input section 4 is a command signal for operating the audio reproduction section 20, the process moves to step 235. In step 235, the audio reproduction unit 20 is operated according to the recognized command content. In other words, since the audio reproduction section 20 is for reproducing audio signals from the car phone 6, radio tuner 8, etc., the operation commands include, for example, operation commands for raising or lowering the volume of the reproduction, An operation command such as changing the sound quality to high or low tone may be considered, but when such an operation command is received, the amplification characteristic of the amplifier 20j is changed according to the content of the command.

Next, in step 205, if it is determined that the input signal from the transmission line 18 is not an audio signal from the audio input section 4, the process moves to the next step 240 to determine whether the input signal is an audio signal. Decide whether or not. If the input signal is an audio signal, it is output as is to the D/A converter 20h, and the analog audio signal is output to the speaker 22 via the low-pass filter 2011 and amplifier 20j. In other words, through this process, audio signals output from devices other than the audio input section 4 are reproduced as they are.

On the other hand, if it is determined in step 240 that the input signal is not an audio signal, step 250 is executed to analyze the input signal, and step 255 is executed to execute processing according to the analysis result. Finish the process.

Next, FIG. 7 shows the circuit configuration of the car telephone 6.

As shown in the figure, in the car phone 6 of this embodiment, like the conventional car phone 6, the signal for the car phone 6 is demodulated from the radio waves input through the antenna common part 6a and converted into an audio signal. A receiving section 6b, a synthesizer section 6G that modulates a voice signal emitted by a vehicle occupant or a signal representing a calling telephone number and outputs the modulated signal via an antenna common section 6a, a transmitting section 6d, a receiver 6e composed of a microphone and a speaker, and a calling section. Keyboard 6 for entering phone numbers, etc.
f, a display section 6g for displaying the call status, a transmission/reception control section 6h for controlling the reception section 6b and the synthesizer section 6C, and a CPLJ 6 for controlling the display section 6q and the transmission/reception control section 6h.
i, ROM6j, and RAM6k.

In addition, in this embodiment, the voice input section 4 connected via the transmission line 18 can be used to make calls and operate the car phone 6, and the voice of the other party can be reproduced via the voice reproduction section 20. The audio signal from the receiving section 6b is A/D
Amplifier 61, low-pass filter 6m, for converting and importing
A sample hold circuit 6n, an A/D converter 6o, a clock signal generation circuit 6D, and a circuit for D/A converting the audio signal from the audio input section 4 and outputting it to the synthesizer 6C side.
D/A converter 6q, low pass filter 6r, and amplifier 6S
, DMA controller 6t for various data input/output control
, a serial controller 6U and an interface 6■ for exchanging various data with the transmission line 18, connections between the A/D converter 60 side and the D/A converter 6h side and the transmitting/receiving units 6b and 6d side, Or the receiver 6e and the transmitter/receiver 6
Changeover switch 6W for switching connection with b and 6d sides
and 6x.

Note that the ROM 6j includes, similarly to the audio reproduction section 20, so that it can detect that the audio signal inputted from the audio input section 4 via the transmission line 18 is the audio signal for driving the car phone 6. Formant frequencies, which are audio data representing the audio signal, are recorded.

In the car phone 6 configured in this manner, the CPU 6* executes transmission/reception control based on signals flowing through the transmission line, similarly to the audio reproduction section 20 described above. This transmission/reception control process will be explained below with reference to the flowchart shown in FIG.

As shown in the figure, when the process starts, first step 300
Then, as in step 200 of the audio signal reproduction process, it is determined whether the reception of the signal flowing through the transmission line 18 has been completed. When the reception of the signal is completed, the next step 305 is executed, and it is determined whether the read signal is the signal output from the audio input section 4 or not.

Next, if the read signal is an audio signal output from the audio input unit 4, the audio signal is stored in step 310, and then the process moves to steps 315 and 320. Steps 315 and 320 are steps 210 and 21 of the audio signal reproduction process.
Similar to step 5, this is a process for analyzing the audio signal from the audio input unit 4 to extract feature parameters, and when the feature parameters of the input audio signal are extracted in this process, the process moves to the next step 325. .

In step 325, the extracted feature parameters and the corresponding car phone 6 recorded in advance in the ROM 6j are used.
and one of the formant frequency data representing the operation command, and in the next step 330, it is determined whether or not the respective data match. If the respective data do not match, the process moves to step 335, and the steps 325 and 3 described above are executed.
It is determined whether all the formant frequency data recorded in the ROM 6j have been compared in step 30, and if there is any formant frequency data that has not been compared, the process returns to step 325. The signal is compared with all voice data representing operation commands for the car phone 6 recorded in the ROMGj.

Next, in step 330, if it is determined that the characteristic parameters obtained by analyzing the audio signal from the audio input unit 4 match the formant frequency data, which is the audio data representing the operation command recorded in ROMej, step 330 is performed. 340. Then, in step 340, the mobile phone 6
operate. In other words, in the car phone 6, operation commands include a command to call a telephone number, a command to end a call, or whether to use the handset 6e for a call or to use the voice input unit 4 and the voice playback unit 20.
A communication device switching command, etc. that instructs whether to use the
If there is such a command, the transmission/reception control section 6h
, changeover switches 6X, 6W, etc. will be operated.

On the other hand, the audio signal input in step 335 above and the ROM
If it is determined that the comparison with all the voice data recorded in ej has been completed and a command signal for operating the car phone 6 is not extracted from the voice signal from the voice input unit 4, step 345 is performed. to move to. and step 34
In step 5, it is determined whether or not a call is currently being made using the voice input unit 4, and if the call is currently being made using the voice input unit 4, the next step 350 is executed, and the information saved in step 310 is executed. The audio signal is output as is to the D/A converter 6q. In other words, the voice signal inputted via the voice input unit 4 and emitted by the vehicle occupant is thereby converted into an analog signal.
It will be transmitted to the car telephone line via the synthesizer section 6C and the transmission section 6d.

Next, in step 305, if it is determined that the signal flowing through the transmission line 18 is not an audio signal output from the audio input section 4, step 355 is executed to determine whether the signal is an audio signal or not. to judge. If the signal is an audio signal, the radio tuner 8 or CD player 10
etc., and there is no equivalent relationship with the car phone 6, so the process is terminated as is. Analyze the signal, step 3
At step 65, processing according to the analysis result is executed, and the processing of this routine ends.

Next, FIG. 9 shows the circuit configuration of the radio tuner 8.

As is conventionally known, the radio tuner of this embodiment has the following features:
An FM tuner circuit 8a consisting of a front end, an IF amplifier circuit, a demodulation circuit, an MPX demodulation circuit, etc.; an AM tuner circuit 8b also consisting of a front end, an IF amplifier circuit, a demodulation circuit, etc.; and a tuner that drives each tuner circuit. Drive circuit 8c, operation key 8d for specifying a selected channel, etc. Executes so-called channel selection control in which a control signal is output to tuner drive circuit 8C according to the selected channel etc. specified via operation key 8d. CPU8 for
e, ROM8f, and RAM8().

Furthermore, in this embodiment, the radio tuner 8 includes each tuner circuit, in order to output the audio signal received and demodulated by the tuner circuits 8a and 8b onto the transmission line 18 and reproduce it by the audio reproducing section 20. An amplifier 8h, a low-pass filter 811, a sample hold circuit 8j, and an A/D converter 8k for amplifying and A/D converting the audio signals from the circuits 8a and 8b.

and a clock signal generation circuit 81, a DMA controller 8m for controlling input/output of the converted audio signal and signals flowing to the transmission line 18, a serial controller 8n for exchanging data with the transmission line 18, and a clock signal generation circuit 81. An interface 8o is provided.

Therefore, the audio signal selected and demodulated by the tuner circuit 8a or 8b is converted into a digital signal at a predetermined period, and the CPU 8e
The signal is output onto the transmission line 18 via the serial controller 8n and the interface 80 without any additional effort.

In addition, the cpuse not only executes the tuning control described above in accordance with the signal from the operation key 8d, but also processes the signal flowing on the transmission line 18 that is input via the interface 80 and the serial controller 8n to control the radio. A command signal for operating the tuner 8 is extracted, and transmission signal processing is executed in accordance with the procedure shown in FIG. 10 so that channel selection control can be executed using this signal as well.

In other words, this transmission signal processing is performed on the transmission line 1 as well as the various control processing executed by the audio reproduction section 20 and the car telephone 6.
8 is read and analyzed, and if the signal is a command signal for operating the radio tuner, the radio tuner is operated accordingly. When the process starts, step 400 is first performed. Run transmission line 1
8 is completed. When the reception of the signal is completed, the next step 405 is executed, and it is determined whether the signal is the audio signal output from the audio input section 4 or not.

If the read signal is an audio signal from the audio input unit 4 in step 405, steps 410 and 415 are executed, and step 210 and step 2 are performed.
15, or similarly to steps 315 and 320, the audio signal is analyzed to extract characteristic parameters. Then, in the next step 420, the extracted characteristic parameters are compared with one of the formant frequency data representing the operation command for the radio tuner 8 recorded in advance in the ROM 5f, and in the subsequent step 425, it is determined whether or not they match. to judge.

If it is determined in the process of step 425 that the formant frequency does not match, the process moves to step 430, and similarly to step 230 or step 335, the process of steps 420 and 425 is recorded in the ROMaf. It is determined whether the execution has been performed for all formant frequency data. If the read audio signal cannot be recognized even after comparison with all formant frequency data, the process is immediately terminated.

On the other hand, if it is determined in step 425 that the characteristic parameters of the input audio signal match the formant frequency data recorded in advance in the ROMaf, the process moves to step 435.

Then, in step 435, the radio tuner 8 is operated according to the recognized command contents. That is, a control signal is output to the tuner drive circuit 8C in response to a command signal from a vehicle occupant input via the voice input section 4,
It performs channel selection control.

Next, in step 405, if it is determined that the input signal is not an audio signal from the audio input section 4, the process moves to step 440. Then, in step 440, it is determined whether or not the input signal is an audio signal, and if it is an audio signal, the process of this routine is directly terminated. If it is determined in step 440 that the input signal is not an audio signal, the process moves to the next step 445 to analyze the signal, and in the subsequent step 450, processing is executed in accordance with the analysis result.

Next, FIG. 11 is a block diagram showing the circuit structure of the CD player 10.

As shown in the figure, the CD player 10 of this embodiment includes a compact disc (hereinafter referred to as CD) 2 as in the conventional case.
A loading motor 10b and a solenoid 10C for fixing the CD 24 on the turntable 10a, a loading sensor 10d for detecting the placement state of the CD 24 on the turntable 10a, and a loading sensor 10d for rotating the turntable 10a to release the CD.
A spindle motor 10e that rotates the CD 24, a reading head 10f that irradiates the CD 24 with laser light and receives the reflected light, a slider motor 10Cl that moves the reading head 10f in the radial direction of the CD 24, and drivers 10h to 10j that drive these parts. , a signal from the reading head 10f obtained via the servo control circuit 10k is sent to the servo control circuit 10 which executes laser beam irradiation position control (tracking control and focusing control) on the CD 24 according to the light reception signal from the reading head 10f. A signal processing circuit 101 that processes the received light signal to extract various control information such as the audio signal recorded on the CD 24 and playback position information, and also corrects errors in the audio signal that occur during recording and playback according to the extracted control information. , signal processing circuit 10
Based on the control information obtained in step 1, the spindle motor 10e
CLVI control circuit 10m1CD that controls the rotation of
Operation keys 10n for specifying 24 playback channels, etc.
.

The slider motor 10g is driven and controlled according to the playback channel commanded via the operation key 10n and the position information extracted by the signal processing circuit 101, and the position of the reading head 10f is controlled, and the detection signal from the loading sensor 10d is used to control the slider motor 10g. Based on the loading motor 10b and solenoid I
a CPU 10o that drives and controls the OC and executes various controls for fixing the CD 24 on the turntable 10a;
ROMlopSRAMIOq is provided.

The CD player 10 also includes the radio tuner 8.
Similarly, a DMA controller 10r, a serial controller 10S, and an interface 10t1 are provided.

Therefore, the audio signal from the signal processing circuit 101 is output as is to the transmission line 18 via the serial controller 10S and the interface 10t by the operation of the DMA controller 10r, and is reproduced by the audio reproducing section 20.

In addition, the CPU 100 not only executes various controls for driving the CD player 10 in response to signals from the operation keys 10n, but also processes signals flowing through the transmission line 18 to generate command signals for operating the CD player 10. is extracted, and the CD player 10 can also be driven and controlled by this.

In other words, the CPU 10o of the CD player 10 also executes the transmission signal processing in the procedure shown in FIG.
drive control is executed.

Next, FIG. 12 is a block diagram showing the circuit structure of the cassette deck 12. As shown in FIG.

As shown in the figure, the cassette deck 12 also has a tape running switching circuit 1, similar to the radio tuner 8 described above.
2a, a metal switching circuit 12b, a drive circuit 12d for the tape running blade 12c, and an operation key 12e for each of these parts.
CPUI 2Cl, RO for controlling the drive according to the operation signal from the deck state detection circuit 12f and the detection signal from the deck state detection circuit 12f.
A clock signal generation circuit 12k and an amplifier 12 are installed in a conventional cassette deck equipped with an MI 2h and a RAM 12i, for A/D converting the audio signal recorded on the cassette tape read by the tape head 12j. The system includes a filter 12m1, a sample hold circuit 12n, an A/D converter 120, a DMA:I Citrola 12p1, a serial controller 12q1, and an interface 12r.

Therefore, in the cassette deck 12, like the radio tuner 8, the audio signal read by the tape head 12j is converted into a digital signal in synchronization with the clock signal from the clock signal generation circuit 12k, and the signal is sent to the DMA controller 12p. Serial controller 1 by operation
It will be output onto the transmission line 18 via the 2q1 interface 12r.

Further, the CPU 12g, like the radio tuner 8, CD player 10, etc., can drive and control the cassette deck 12 not only by signals from the operation key 12e but also by signals flowing through the transmission line 18. That is, the transmission signal processing is also completed in the CPLll2(l) of the cassette deck 12 according to the procedure shown in FIG. I'm going to be there.

Next, FIGS. 13 and 14 show the circuit configurations of the navigation device 14 and the direction detection device 16, respectively.

First, the navigation device 14 stores the map data storage device 1.
4a, an input interface 14d for receiving a designated signal such as a display map input via the operation key 14C, and a storage device interface 14b for importing map data stored in the controller 4a; a CRT control circuit 14f for driving the CRT 14e that displays position information, etc.;
CRT controller 14g and video RAM 14h.

Reads map data from the map data storage device 14a in response to a designated signal input via the operation key 14C.
It can be displayed on the RT14'e, or it can be displayed on the direction detection device 1 described later.
A CPU 14i and a ROM 14j for executing drive control of the CRT 14e, which calculates the vehicle position based on the detection results of 6 and displays the position information on the map of the CRT 14e.
, and a RAM 14k, etc., is provided with a serial interface 141 for exchanging various data with the transmission line 18.

The orientation detection device 16 also includes a geomagnetic sensor 16e configured by winding an excitation winding 16b1 and two orthogonal output windings 16C116d around a ring-shaped magnetic core 16a with high magnetic permeability, and an excitation winding 16b. The direction detection timing is detected based on the output signal from the excitation circuit 16f and the oscillation circuit 16g for excitation by passing current, and the oscillation circuit 16Q, and the output winding 1 is adjusted according to the detection timing.
According to the request of the current detection circuits 16h, 161, timing circuit 16j, sample and hold circuit 16, A/D converter 161, and navigation device 14, the current flowing through the 6C 116d is converted into a digital signal and taken in /D-converted azimuth signal and outputs it to the navigation device 14, as well as for calculating and correcting the error in the azimuth obtained by the device. CPLll 6m, ROM 16n.
, and a RAM 16o, which is provided with a serial interface 16p for exchanging various data with a transmission line 18.

For this reason, the exchange of azimuth data, etc. between these devices is performed via the transmission line 18, and the navigation device 14
Now, it becomes possible to know the direction via the transmission line 18 when necessary. In addition, the CPU 14 of each of these devices
At i and 16m, transmission signal processing is executed in the procedure shown in FIG.

As described in detail above, in the voice input device of this embodiment, the voice emitted by the vehicle occupant input through the voice input section 4 is transmitted to the car telephone 6 or the radio tuner 8 through the transmission line 1B.
etc., and each electronic device recognizes the drive command for the device from the audio signal and controls its operation. Therefore, according to the voice input device of this embodiment, not only can various electronic devices be operated simply with words, but also the system can be easily changed. In other words, for example, when a television receiver is added to the system of the above embodiment, an interface, serial controller, etc. for exchanging data with the transmission line 18 is provided on the receiver side, and input from the audio input section 4 is provided. It is only necessary to make it possible to recognize the command for driving the device from the audio signal, and it becomes possible to easily change the system without changing the audio input section as in the past.

Further, in this embodiment, the transmission line 18 is used to output audio signals obtained from the radio tuner 8 and the CD player 10 to the audio reproduction device 20. Therefore, a signal line for transmitting the audio signal to the speaker becomes unnecessary.

Since the audio signal flowing on the transmission line 18 is a digital signal, it is resistant to external noise and can reproduce audio satisfactorily.

Furthermore, since various information can be added to the audio signal flowing through the transmission line 18, a transmission failure can be detected based on the information on the audio reproducing unit 20 side.
0 sends a retransmission command to the device that outputs the audio signal,
It is also possible to output the audio signal again or to restore the audio signal to a normal signal.

[Effects of the Invention] As detailed above, according to the voice input device for in-vehicle electronic devices of the present invention, it is possible not only to operate a plurality of electronic devices with the voice emitted by a vehicle occupant, but also to control the target of voice input. When increasing or changing the number of electronic devices, it is only necessary to provide the added or changed electronic devices with voice recognition means, and the system can be easily changed.

[Brief explanation of the drawing]

Figure 1 is a configuration diagram showing the configuration of the present invention, Figures 2 to 14
The figure shows one embodiment of the present invention, FIG. 2 is a block diagram showing the overall structure of the embodiment, FIG. 3 is a block diagram showing the structure of the voice input section, and FIG. 4 is a block diagram showing the structure of the voice input section. Flowchart showing voice input processing, FIG. 5 is a block diagram showing the structure of the sound playback section, FIG. 6 is a flowchart showing the sound playback processing executed by the sound playback section, and FIG. 7 is the configuration showing the structure of the car phone. 8 is a flowchart showing the transmission/reception control processing executed by the car phone, FIG. 9 is a block diagram showing the configuration of the radio tuner, and FIG. 10 is a flowchart showing the transmission signal processing executed by the radio tuner etc. Figure 11 is C
FIG. 12 is a configuration diagram showing the configuration of the D player, FIG. 12 is a configuration diagram showing the configuration of the cassette deck, FIG. 13 is a configuration diagram showing the configuration of the navigation device, and FIG. 14 is a configuration diagram showing the configuration of the direction detection device. be. Mla-Mln...Electronic device M2...Audio input means 4...Audio input section M3,
18... Transmission line M4... Audio input means 2... Microphone 6... Car phone 8... Radio tuner 10... CD player 12... Cassette deck 14... Navigation device 16.・Direction detection device

Claims (1)

[Scope of Claims] A voice input device for in-vehicle electronic equipment that inputs operating commands for a plurality of electronic devices mounted on a vehicle by voice, which inputs voice emitted by a vehicle occupant and converts the voice into an electric signal. audio input means for converting the audio signal into a signal and outputting the signal; a transmission line for transmitting the audio signal output from the audio input means to the plurality of electronic devices; 1. A voice input device for an in-vehicle electronic device, comprising: voice recognition means for recognizing an operation command for the electronic device by comparing a voice signal transmitted by the electronic device with pre-recorded voice data.