JPS63299558A - Radio telephone system - Google Patents

Abstract

PURPOSE:To realize the sure recognition and transmission of voices by always keeping a handset mike under an ON state in a recognition mode where the aural dialing actions are possible so that the reduction of the head voice signal level is avoided when the voices are recognized. CONSTITUTION:A voice input means 496 is provided together with a voice recognizing means 422a which recognizes the voices supplied to the means 496, a voice switch means 422, and a transmission means which reads a telephone number corresponding to the voices out of a telephone number memory means and carries out a calling action in response to said telephone number. The means 422 activates the function of the means 496 when the voices are supplied to this means 496, stops the function of the means 496 when no voice is supplied to the means 496 in a calling state, and then activates again the function of the means 496 if no voice is supplied to this means 496 when voices are recognized respectively. Thus the means 496 is set in an active state even with no input of voices when the voices are recognized. As a result, the reduction of the head voice signal level is avoided when the voices are recognized.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention (Field of Industrial Application) The present invention relates to a radio telephone device such as a car telephone device.

(Prior Art) In recent years, car telephone devices have been equipped with a so-called voice switch that turns off the microbong when no voice is being uttered, in order to prevent the noise inside the car from being transmitted to the other party during a call. Functionality is being realized. In addition, a so-called voice dialing function is being realized in which a car telephone device is equipped with a voice recognition function, and a call is made by uttering voice without dialing.

By the way, in a car telephone device equipped with a voice switch function and a voice dial function, the voice signal level at the beginning of a voice word decreases due to the time constant of the voice switch during voice dialing, resulting in erroneous voice recognition or voice recognition being impossible. There is an opening theme:

(Problems to be Solved by the Invention) The present invention was made based on the above circumstances, and an object of the present invention is to provide a wireless telephone device that can reliably perform voice recognition and can reliably make a call. The purpose is

[Structure of the Invention] (Means for Solving the Problems) The m-less telephone device of the present invention includes a voice input means, a voice recognition means for recognizing the voice input to the voice input means, and a voice input means. The function of this voice input means is activated when voice is being input to the voice input means, and the function of this voice input means is activated when voice is not input to the voice input means during a call, and the voice input means is activated when voice is recognized. a voice switch means for activating the function of the voice input means when no voice is input to the means; a number storage means for storing a telephone number corresponding to a predetermined voice; and a voice recognized by the voice recognition means. The present invention is characterized by comprising a calling means for reading out a telephone number corresponding to the telephone number from the number storage means and making a call according to the telephone number.

(Function) In the radio telephone device of the present invention, the voice input means is kept in an operating state even when no voice is input during voice recognition, so that the voice signal level at the beginning of a voice word is prevented from decreasing. Ru.

(Example) Hereinafter, details of an example of the present invention will be described based on the drawings.

FIG. 1 is a block diagram showing the configuration of a car telephone device according to an embodiment of the present invention.

The car phone device 100 shown in the figure includes an antenna 200,
For example, as shown in FIG. 2, the antenna 200 is attached to the outside of a car 500, and the radio device 300 is installed in the trunk 50 of the car.
The telephone R400 is mounted in the automobile 500 near the driver's seat 504.

The radio device 300 includes a radio section 310 that forms a radio line 600 and exchanges signals with a base station (not shown) via an antenna 200, an audio/control section 330 that performs overall control of the entire device, The voice dial section 350 that performs voice recognition and voice synthesis, etc., the IDROM 370 in which ID numbers and telephone numbers are registered, and the power of the battery 506 (see Figure 2) installed in the car are inputted via the fuse 508. The main part of the apparatus is composed of a power supply section 390 that supplies each part of the apparatus.

The telephone 400 controls the overall 1W16! an audio/control section 410 that performs key operations, a key section 430 that performs predetermined key manual operations, a display section 450 that performs predetermined displays, a Swiss/Sochi section 470 that performs various changes, and an input/output of audible sounds. The main part is composed of an audio input/output section 490. Note that this telephone 61400 has two main bodies 40 consisting of a telephone main body 400a and a handset 400b.
On the 0a side, a part of the audio/control section 410 and a switch section 470 are provided, as well as a speaker 492 which is an audio input/output section 490, and a hands-free microphone 494 attached to, for example, a sun visor 510 near the driver's seat 504. It is connected. The handset 400b side is provided with a part of an audio/control part 410, a key part 430, a display part 450, and an audio input/output part 49.
A handset microphone 496 and a handsera I/receiver 498 are provided.

FIG. 3 is a block diagram showing the configuration of the above-mentioned radio device in further detail.

As shown in the figure, the radio section 310 includes a demodulator 312, a modulator 314, a power amplifier 316, a duplexer 318,
It is composed of a synthesizer 320. Demodulator 312
is the radio section a600, antenna 200, duplexer 318
demodulates the received signal from the base station that is input via the
Note that this received signal includes an audible sound signal and a ¥A subtitle signal. Modulator 314 is audio/control unit 330
The audible sound signal, control signal, etc. output from the transmitter is modulated into a transmission signal. Power amplifier 316 amplifies the transmit signal output from modulator 314 . Note that the amplification factor in this power amplifier 316 can be switched in eight steps, for example. The transmitter/receiver duplexer 318 is a wireless section a600,
The received signal input via the antenna 200 is sent to the demodulator 3.
At the same time, a transmission signal input via a modulator 314 and a power amplifier 316 is sent to the antenna 200. Synthesizer 320 is a local oscillator for channel selection, and specifies the frequency to be demodulated by demodulator 312 and the frequency to be modulated by modulation H 314. Note that there are approximately 666 channels specified by this synthesizer 320, for example.

The audio/control unit 330 includes a CPU 331, an oscillator/
Frequency divider 332, address decoder 333, ROM334
, RAM 335, radio section control section 33'6, audio section 337, #] control processing section 338, audio section control section 339, digital interface 340, power supply section control section 341, and interrupt controller 342. In the figure, reference numeral 343 is, for example, an 8-bit data bus, 344 is an address bus, and 345 is a control bus. The CPU 331 is the audio/control unit 3
A six oscillator/frequency divider 332 that performs overall control of the entire CPU 331 supplies a clock to the CPU 331, and also divides the frequency of this clock and supplies it to each part as a timing signal. Address decoder 333 outputs predetermined operation signals to each section in response to command signals from CPU 331. ROM334
stores various programs necessary for the operation of the CPU 331. The RAM 335 stores various data during processing by the CPU 331. The radio unit control unit 336 controls the radio unit 310 based on instructions from the CPU 331. For example, the radio unit control unit 336 controls the frequency that the synthesizer 320 should specify, the amplification factor that the power amplifier 316 should amplify, and the modulator 3.
14 instructs the degree of modulation to be modulated, etc., and also inputs an out-of-synchronization signal output from the synthesizer 320, an output detection signal output from the power amplifier 316, etc. as a measure to prevent malfunction, and transmits these to the CPU 331. The audio section 337 sends the control signal of the received signal demodulated by the demodulator 312 to the control signal processing section 338 and the audible sound signal to the voice dial section 350 and the telephone 400, and output from the control signal processing section 338. The In+ signal and the audible sound signals output from telephone 400 and voice dial section 350 are sent to modulator 314 . Note that the audio section 337 also has functions of waveform shaping of the control signal to be sent to the control signal processing section 338 and filtering of the control signal to be sent to the modulator 314. The control signal processing unit 338 performs bit synchronization and frame synchronization with the control signal output from the audio unit 337, captures control data from the base station included in the control signal, which is a serial signal, as a parallel signal, and Control data as a parallel signal to be sent to the base station is sent to the audio section 337 as a control signal that is a serial signal.

The audio section control section 339 performs various types of waste control of the audio section 337. For example, the audio section control section 339 transfers the received signal from the audio section 337 to the control signal processing section 3.
38, switching control and control signal processing unit 338 that sends out to either the voice dial unit 350 or the telephone 400;
A digital interface 3 that performs switching control to input either the transmission signal output from the voice dial section 350 or the telephone@400 to the audio section 337.
40 provides an interface between this radio 1300 and the telephone 400. The power supply unit control unit 341 controls the power supply unit 390
For example, the power supply unit control unit 341 controls the power supply unit 390 to set the voltage supplied from the battery 506 to a predetermined voltage and supply it to each unit. The interrupt controller 342 receives interrupt commands from various parts and executes the CPO.
Interrupt 331.

FIG. 4(a) is a block diagram showing in more detail the configuration of the voice dial section 350 shown in FIGS. 1 and 3. FIG.

As shown in the figure, the voice dial section 350 includes a voice recognition section 350a that performs voice recognition, a voice synthesis section 350b that performs voice synthesis, and a DTMF reception section 35 that receives DTMF signals.
It is composed of 0c.

The voice recognition unit 350a has a balanced/unbalanced (B/
U) Converter 351, bypass filter 352, amplifier 3
53, AGC circuit B554, attenuator 356, voice recognition 1Ls
I357, RAM358, latch times B 359.360
, gate circuits 361, 362, address decoder 363
It consists of

FIG. 4(b) is a circuit diagram showing a part of the structure of such a speech recognition section 350a in more detail. As shown in the figure, the B/U converter 351 includes an operational amplifier 0P351, resistors R351a, R351b, R351C, R3! +1
d, R351e, capacitor C351a, C35i
b, a differential amplifier circuit composed of a reference voltage V refl. Here, in this car phone device 100,
Hands-free microphone 494, handset microphone 496
Immediately after each of the two operational amplifiers OP 412a (421a) and OP 412 as shown in FIG.
b (421b), resistor R412a (421a), R41
2b (421b), R412c (42iC), R412
d (421d), an unbalanced/balanced (tJ/B) converter 412 (421d), and a reference voltage V ref3.
21) (see Fig. 8) are arranged. Therefore, the hands-free microphone 494 or the handset microphone 49
The audio signal input from 6 is sent to U/B converter 412 (4
21), the balance line 351a (412b, 42
1b) is converted into a signal on the balance line 351a (4
12b, 421b)e is input to this speech recognition unit 350a. The audio signal on the balanced line 351a input to the -2 audio recognition unit 350a is converted into an audio signal on the unbalanced line 351b by the B/U converter 351, and then the audio signal for the audio recognition unit 350a is converted into an audio signal on the unbalanced line 351b. It is used as a signal. Therefore, the balance line 351a (412b, 421b
) The common mode noise on the two lines that make up the balanced line is the common mode noise on the B/U
It is canceled and removed by converter 351. Therefore, it is possible to prevent malfunctions due to recognition errors caused by such noise and to improve the recognition rate. The bypass filter 352 includes an operational amplifier 0P352 and a resistor R3.
52a, R352b, R352c, capacitor C3
52a, C352b, and a reference voltage V refl, with a cutoff frequency fc of about 6001-tz,
The purpose is to remove low frequency components from the voice signal input to the voice recognition unit 350a.Normally, the noise inside the car 500 has many low frequency components, and the voice signal input from the handsfree microphone 494 or the handset microphone 496 contains these low frequency components as noise. Therefore, by performing speech recognition by removing low frequency components as described above, it is possible to prevent malfunctions due to recognition errors caused by noise and improve the recognition rate. The amplifier 353 includes an operational amplifier 0P353, a transmission gate TG353, and resistors R353a and R353L.
It is composed of R353c and R353d and amplifies the audio signal from the bypass filter 352. This amplifier 35
3 is controlled by I11 of the audio/control unit 330 so that when the hands-free microphone 494 is used as a voice input means in the telephone 400, the amplification factor is lower than when the handset microphone 496 is used. this is,
The CPU 331 of the audio/control unit 330 has a status flag based on a control signal from a hook switch 472 that detects on-hook or off-hook of the handset 400b, which will be described later. This is realized by setting a flag and inputting a predetermined control signal from the CPU 331 to the control side of the transmission gate TG 353 via the digital interface 340 and the latch circuit 359 based on the flag. However, when using the hands-free microphone 494, there is a greater amount of noise from the car 500 mixed in than when using the handset microphone 496, so the hands-free microphone 4
By lowering the amplification factor when using the 94, it is possible to prevent malfunctions due to recognition errors caused by noise. A
The G C circuit 354 includes operational amplifiers OP 354a, O
P 354b, transistor Tr 354, resistor R3
54a, R354b, R354c, R354d,
R354e, capacitor C354a, C354b,
Operational amplifier O consisting of C354c, diodes D354a and D354b, and reference voltage V ref2.
P 354a takes the difference between the audio signal amplified by the amplifier 353 and the reference voltage V ref2. Then, the rectified value of this difference component by the diodes D354a, D354t+, capacitor C354a, etc. is the operational amplifier OP3
The level of the audio signal input to the amplifier 353 is inputted to the base (control side) of the transistor Tr354 via the voltage follower circuit composed of the voltage follower circuit 54b. #I control.

That is, the amount of the audio signal amplified by the amplifier 353 is controlled by the AGC circuit 354, and an audio signal of a predetermined level is always output from the amplifier 353 regardless of the strength of the audio signal from the bypass filter 352. This makes it possible to expand the dynamic range and absorb individual differences in audio levels. That is, voice recognition can be performed at the individual's normal voice level without being affected by the strength of the voice level, and the recognition rate can be improved. The attenuator 356 includes an operational amplifier 0P356, a transmission 3 input gate TG356a, TG356b, and T
G 356c, resistance R356a, R356b, R3
56c, etc. The audio signal output from the amplifier 353 is passed through the transmission gate T G 35
6a and resistor R356a are connected in series, transmission gate TG356b and resistor R3
It is input to the operational amplifier 0P356 through a second route formed by connecting the transmission gate TG 56b in series, and a third route formed by connecting the transmission gate TG 356c and the resistor R356C in series, respectively.
The output becomes the audio signal input to the audio recognition LSI 357. Each transmission gate T Cx 356a
, TG356b, and TG356c receive an 0N10FF command signal from the CPU 331 of the audio/control unit 330 through the latch circuit B35. And each transmission game 1-TG 356a, TG
356b, T G 356c are these 0N10FF
Each of them is turned 0N10FF according to the command signal. Thus, the attenuation rate of attenuator 356 is
The audio signal attenuated according to this attenuation rate is input to the audio recognition 1LsI 357. This results in
When registering voice during a registration operation before voice dialing, which will be described later, it is possible to register voice multiple times at different audio signal levels.

The voice recognition LSI 357 recognizes voice signals.

The RAM 358 stores data of words to be recognized by the speech recognition LSI 357.

FIG. 5 is a block diagram showing the structure of the above-mentioned speech recognition LSI 357 in more detail.

As shown in the figure, the speech recognition LSI includes two sets of amplifiers 3
57a, 357b, 4 sets of band pass filters 357c
, 357d, 357e, 357f, multiplexer 357g,
A/D converter 357h, CPU357i, ROM357
J, RAM 357k, CPU interface 357℃,
It consists of a RAM interface 357m.

Amplifiers 357a and 357b amplify input audio signals. The amplification factor of each amplifier 357a, 357b is, for example, 10 times. Bandpass filter 357C
5357d, 357e, and 357f are band-pass filters 3 that filter this amplified audio signal.
The passband center frequencies of 57C1357d, 357e, and 357f are, for example, 0.5 km, 7 in 1, 7 in 2, and 7 in 4, respectively. The multiplexer 357g includes each bandpass filter 357c, 357d, 357e, 357
The filtered audio signals output from f are multiplexed. A/D converter 457h converts this multiplexed audio signal into a digital signal.

The CPU 357i performs overall control of the voice recognition LSI 357, and the ROM 357j stores various programs necessary for the operation of the CPU 3571. RAM357 has CP
Stores various data when controlling the U357i. CPU interface 357.2 interfaces with audio/control unit 330. RAM interface 3
57m interfaces with RAM 358.

At the time of speech recognition, amplifiers 357a, 357b,
Bandpass filter 357C1357d, 357e, 3
57f, a multiplexer 357g, and an A/D converter 357h to which the sampled, quantized, and encoded audio signals are inputted via the RAM interface 357m. It is compared with the desired word data. Furthermore, when registering a word to be recognized, data of the audio signal to be registered, which has been sampled, quantized, and encoded in the same manner as described above, is sent to the RAM 358 via the RAM interface 357m and stored therein.

The voice synthesis section 3 Ob is composed of a voice synthesis LSI 364 that generates a predetermined voice based on data sent from the audio/control section 330, a latch circuit 365, and an amplifier 366 that amplifies the synthesized voice.

FIG. 6 is a block diagram showing the configuration of the above-mentioned speech synthesis LSI 364 in more detail.

As shown in the figure, the speech synthesis LSI 364 includes a ROM 364a for indirectly specifying the address of the word to be generated using a predetermined code, a ROM 364b for storing speech parameters, and a parallel/serial converter for reading the speech parameters. 364c, a RAM 364d for storing parameters for one frame, a ROM 364e for nonlinearly decoding parameters, an interpolation circuit 364f for interpolating parameters at predetermined time intervals, a register 364g for storing parameters and performing calculations, Voiced sound source 364h,
Silent sound source 364i, lattice digital filter 364J
, a D/A converter 364, and so on.

The DTMF receiving section 350C includes a bypass filter 367,
It consists of a DTMF receiver 368.

The DTMF receiver 368 receives the DTMF signal contained in the audio signal via the bypass filter 367 and recognizes it.

FIG. 7 is a diagram showing the configuration of the above-mentioned telephone 400 in further detail.

As shown in the figure, the telephone body 400a includes a B/U converter 411, a U/B converter 412, and amplifiers 413 and 414.
, an audio/control section 410 consisting of an echo canceller 415, and switches 416 and 417, and an audio input/output section 490 consisting of a hands-free microphone 494 and a speaker 492.
, hook switch 472, on/off switch 474
The main part thereof is composed of a switch section 470 consisting of.

The B/lJ converter 411 converts the audio signal sent from the audio section 337 of the radio device 300 via the balanced line 411a into a signal on the unbalanced line 411b. The audio signal converted into a signal on the unbalanced line 411b is amplified by the amplifier 413 and output from the speaker 492. Note that since the audio signal output from the audio section of the radio is a signal on an unbalanced line, it is converted into a signal on a balanced line by the U/B converter 337a placed immediately after the audio section. The U/B converter 412 is a hands-free microphone 4.
The audio signal on the unbalanced line 412a input at 94 and amplified by the amplifier 414 is transferred to the balanced line 412b.
Convert to the above signal. The audio signal converted to the signal on the balanced line 412b is sent to the audio unit 337 via the balanced line 412b.6 Note that the audio signal input to the audio unit 337 of the radio 300 is the signal on the unbalanced line. Therefore, the signal is converted into a signal on an unbalanced line by the B/U converter 337b placed before M of the audio section 337. The echo canceller 415 connects the B/U converter 411 to the amplifier 4.
Attenuator 415a that attenuates the audio signal input to 13
, an attenuator controller 415b that controls the attenuation rate of the attenuator 415a, an attenuator 415c that attenuates the audio signal input from the amplifier 414 to the U/B converter 412, and an attenuator that controls the attenuation rate of the attenuator 415C. device control unit 415d,
Each attenuator controller 415 based on the audio signal on each line.
b, W control amount calculation unit 415e that calculates control 1 of 415d
It consists of

A switch 416 switches whether or not the audio signal from the B/U converter 411 is output from the speaker 492.

The switch 417 switches whether or not to send the audio signal from the hands-free microphone 494 to the audio section 337 of the non-FF1FI 300.

In addition, switching of these switches 416 and 417 is not required.
This is performed based on the #1vn signal sent from the audio/control unit 33o of the 81300. hook switch 47
2 detects on-hook or off-hook of handset 400b. This detected signal is sent to the audio/control section 330 of the wireless section 300. The on/off switch 474 turns on/off the entire car telephone device 100, and this switching signal is sent to the audio/control section 330 of the radio section 300.

The handset 400b includes a control section 418 and an amplifier 419.
a, 419b, 419c, attenuator 420, U/B converter 421, audio switch section 422, switch 423.42
a display section 450 consisting of a liquid crystal display 452 and an LCD driver 454; a key section 430 consisting of a plurality of keypads; and an audio input/output section consisting of a handset microphone 496 and a handset receiver 498. It consists of 490. Control unit 41
8 is the handset 400b based on a control signal sent from the audio/control unit 330 of the radio 300.
It performs overall overall control, and also sends control signals and the like input from the key section 430 to the audio/control section 330 of the radio device 300. Amplifiers 419a and 419b amplify the audio signal sent from B/'U converter 411 of main body 400a. Attenuator 420 attenuates this audio signal. Amplifier 419a, attenuator 420, amplifier 419b
The audio signal via the handset receiver 498 is output from the handset receiver 498. Amplifier 419c is handset microphone 496
Amplify the audio signal input from. U/B converter 42
1 converts this amplified audio signal on the unbalanced line 421a into a signal on the balanced line 421b. The audio signal converted into the signal on the balance line 421b is sent to the audio section 337 via the balance line 421b and the balance line 421c on the main body 400a. A switch 423 switches whether or not to output the audio signal from the B/U converter 411 from the handset receiver 498.

Switch 424 switches whether or not to send the audio signal from handset microphone 496 to audio section 337 of radio device 300 . Note that these switches 423.4
The switching of 24 is performed based on a control signal sent from the control unit 418, and is performed in conjunction with the switches 416 and 417 on the main body 400a side described above. That is, when this car phone 100 is in the receiving state, all the switches 416, 417, 423, 424 are in the OFF state, and when the confirmation sound for key input is sounded, the switch 416 is in the ON state, and the switch 417, 423, 424 is in the ON state.
is in the off-hook state, and when making a call with the handset 400b off-hook, the switches 423 and 424 are in the on-state and the switches 416 and 417 are in the off-state,
When making a call with the handset 400b on-hook, switches 416 and 417 are turned on and switches 423 and 424 are turned off. Audio switch section 4
22 is a level detection H422a, an OR circuit 422b
, , a switch 422C. Level detector 4
22a detects the signal level of the audio signal input to the handset microphone 496, and outputs an "L" level signal when the signal level is below a predetermined value, and a "K" level signal when the signal level is above a predetermined value. OR times 1142. jb takes the logical sum of the output signal of the level detector 422a and a predetermined control signal output from the control section 418. switch 422c
is turned on when a signal of 'L' level is input from the OR circuit 11422b, and the audio signal line 421a falls to the ground level.Therefore, the audio signal from the hand jet microphone 496 is not transmitted to the audio section 337. , the handset microphone 496 is turned off.

Further, the switch 422c is set to "H" from the OR circuit 422b.
When a level signal is input, the handset microphone 496 is turned off and the handset microphone 496 is turned on. Here, the control signal from the control unit 418 inputted to one side of the OR circuit 422b described above is at the "L" level during standby/reception or normal talking, and is at the "L" level during the recognition mode that enables voice dialing, which will be described later. Therefore, when no voice is spoken during a call, the handset microphone 496 is turned off, and the noise inside the car 500 is not transmitted to the other party, allowing a comfortable call. On the other hand, in the recognition mode that enables voice dialing, the handset microphone 496 is always on, so it is unrelated to the switching of the level detection circuit 422a. To prevent discomfort caused by frequent switching when switching based on vocalizations, a capacitor with a predetermined time constant (
(Japanese National Register omitted).

For this reason, in the past, this capacitor lowered the level of the beginning of a voice word during voice dialing, making voice dialing unreliable.However, in this car telephone device 100, as described above, the recognition function that enables voice dialing is used. Having handset microphone 496 always on during mode eliminates this problem and ensures reliable dialing.

The liquid crystal display 452 includes a several-digit number display section 452a, a display section 452b for each function, and the like. LCD driver 454
drives the liquid crystal display 452 under the control of the control unit 418 to display a predetermined display.

The key part 430 is the number keys "0" to "9", "*",
"#", rSNDJ, rsTo,, "ENDJ, rRC
LJ, rFCNJ, rCLR,, rEMRJ, rMUT
It consists of a keypad such as EJ and rTONEJ function keys, and when the keypad is pressed, this is recognized by the control unit 418.

Next, the operation of the mobile phone device 100 having such a configuration will be explained in detail based on a flowchart.

First, the connection control operation of this car telephone device 100 is performed in the eighth
This will be explained based on the diagram.

When the on/off switch 474 of the switch section 470 of the telephone R400 is turned on, power is supplied to each section from the power supply section 390 (step 80T).

FIG. 9 is a flowchart showing detailed operations at that time.

That is, when the power is turned on, each part is reset (step 901), and when the reset of these parts is completed, for example, the entire surface of the liquid crystal display 452 flashes, or a predetermined ringing sound is output from the speaker 492. The user is notified that the reset has been completed.

Thereafter, it is checked whether the locked state is set (step 902). This locked state is a state in which no further operation is performed unless a predetermined key operation is performed on the key part 430. This is intended to prevent unauthorized use.

If the lock state is set, the LCD display 452
The rLOcKJ display lights up at step 903.
). On the other hand, if the locked state is not set, the "No 5vcJ" display lights up on the liquid crystal display 452 (step 904).

Next, when such reset is completed, initialization is performed (step 802).

FIG. 10 is a flowchart showing the detailed operation at that time.

That is, the audio/control unit 330 in the wireless fi 300 obtains received field strength information by causing the demodulator 312 to scan a control channel (hereinafter abbreviated as D channel) predetermined for the system (step 1001). . Then, among the D channels, the D channel having the strongest electric field strength is received. At this time, information on the D channel, which has the next strongest electric field strength among the D channels, is also obtained.

Thereafter, the control signal processing unit 338 performs bit synchronization and frame synchronization, that is, word synchronization, with the D channel being received (step 1002), and obtains system information from this D channel (step 1003).

Incidentally, if the above-mentioned word synchronization or system information reception is not performed even after a predetermined period of time has elapsed, the same thing is performed using the next D channel with the strongest electric field strength (step 1004). In this case, if word synchronization or system information reception is not performed after a predetermined period of time has elapsed, the demodulator scans the D channel again.

When this initialization is completed, the first
As shown in FIG. 1, a similar scan is performed on a control channel (hereinafter abbreviated as P channel) for receiving incoming call signals, etc. (step 803).

That is, the audio/control unit 3 in the radio 300
30 obtains received field strength information by scanning each P channel with the demodulator 312 (step tioi).

Then, a state is reached in which the P channel having the strongest electric field strength among the P channels is received.

At this time, among the P channels, the P channel with the next strongest electric field strength
Channel information is also available.

Thereafter, the control signal processing unit 338 performs bit synchronization and frame synchronization, that is, word synchronization, with the P channel being received (step 1102), and obtains system information from this P channel (step 1103).

Note that if the above-mentioned word synchronization or system information reception is not performed even after a predetermined period of time has elapsed, the same thing is performed using the next P channel with the strongest electric field strength (step 1104). In this case, if word synchronization or system information reception is not performed after a predetermined period of time, initialization is performed again (step 802>
, In addition, if the security information cannot be obtained from the system information, initialization is performed again (step 802).
.

The above connection control causes the device to enter a standby/receive state (step 804).

When an incoming call signal is received via the P channel in this standby reception state, a response signal is returned on a predetermined channel (step 805), and a control signal is sent to the base station in order to establish a call line etc. Scanning similar to the above-mentioned D channel and P channel is performed on the control channel (hereinafter referred to as A channel) that performs reception.

That is, the audio/control unit 330 in the wireless TL 1300 obtains received field strength information by scanning each A channel with the demodulator 312.

Then, among the A channels, the A channel having the strongest electric field strength is received. After this, the control signal processing section 33
8 performs bit synchronization and frame synchronization, that is, word synchronization, with the A channel being received, and when a communication channel designation signal is obtained via this A channel, the communication channel is switched to the designated communication channel (step 807).

Then, this call channel enters the standby state for a ringing signal (step 806), and when the call ends in this reception state, the reception state on this call channel is canceled (step 807), and the transmission function is stopped. (Step 8)
08).

Thereafter, when a paging signal is received through the communication channel, the system waits for a user's response (step 809).

Then, when the user responds by going off-hook or pressing the rsENDJ key, a call is made (step 810), and when the call ends, the receiving state on this call channel is released (step 807), and the transmission Ia
The function is stopped (step 808). Note that if a calling signal is received during a call, the system waits again for the user's response (step 809), and the above-mentioned call channel reception state (step 806), response signal return state (step 804), or call state (step 809) If fading occurs for a predetermined time or longer in step 810), the transmission function is stopped (step 808).

Then, when the transmission function is stopped, step 808
), initialization is performed again (step 802
).

Next, we will explain how to make a call. This call is also made from the standby state in the same way as the above-mentioned incoming call (step 804).
, step 811).

FIG. 12 is a flowchart showing such a calling operation in more detail.

When a call request is received from the key section 430 or by a voice dial, which will be described later, a timer is set to count the time required to accept the call (step 1201).

The set time is, for example, 12 seconds.

After this, the audio/control unit in the radio unit causes the demodulator to scan each predetermined control channel (step 1
202) to obtain received field strength information.

Then, among these control channels, the control channel with the strongest electric field strength is received. Note that at this time, information on the control channel with the next strongest electric field strength among the control channels is also obtained.

Next, it is confirmed whether the user intends to make a call (
Step 1203). This is done after the user sets the phone number of the party he/she wants to call using key part 430, and then
If the call flag that changes state by pressing the NDJ key is "1", it is determined that there is an intention to make a call, and the rS
If the calling flag becomes "0" by pressing the rEND key after pressing the END key, it is determined that there is no intention to make a call. Note that if the user has no intention of making a call,
Initialization is performed again (step 802).

After this, the control signal processing unit performs bit synchronization and frame synchronization, that is, word synchronization, with the control channel being received, and obtains system information from this control channel (
If word synchronization cannot be achieved (step 1204), the same thing is done next using the control channel with the stronger field strength (step 1205). In this case, if word synchronization cannot be achieved, initialization is performed again (step 802).

Also, at this point, it is confirmed again whether or not the user has the intention to make a call (step 120G>).This means that if the call flag is "1", it is determined that the user has the intention to make a call (step 120G>). If the call flag is "0", it is determined that the user has no intention to make a call.If the user has no intention to make a call, initialization is performed again (step 802).
).

Thereafter, this car telephone device 100 grabs a predetermined outgoing control channel based on the above-mentioned system information (step 1207). Note that the calling signal sending enable flag changes from "0" to "1" state due to this interception of the calling control channel. Furthermore, if the outgoing control channel cannot be grabbed, initialization is performed again (step 802).

Furthermore, if there is a delay in seizing the outgoing control channel (step 1208), the intention to make a call is confirmed again (step 1206).

Then, when it is determined that the user has an intention to make a call (the call flag is "1") and the call control channel is prompted (if the call signal sending enable flag is "1"), this call is made. Send a calling signal that includes at least the telephone number information of the other party set by the user on the control channel (Step 1)
209).

Step 1: After this, a response signal to the call included in the system information of the control channel from the base station is received.
210) Recognize that a calling signal has been sent. In addition,
The base station side establishes a line connection with the other party based on the telephone number information included in the calling signal.

Then, a communication state is established on the communication channel (step 1211) specified by the system information of the control channel from the base station. Note that if a communication channel cannot be obtained, initialization is performed again in step 802.
>.

In this way, a telephone conversation similar to that at the time of the above-mentioned incoming call is performed (step 810), and then the conversation is terminated.

Next, the voice dialing function of this car phone W100 will be explained in detail.

First, when performing voice dialing with this car telephone device 100, it is necessary to register the telephone number of the other party to be dialed in advance. FIG. 13 is a flowchart showing such a registration operation, and the registration operation will be explained below based on this flowchart.

First, the registration mode is set (step 1301).

This is done by a predetermined key operation in the key section 430 (step 1302), for example, the operation is
rCLRJ, "X", ry,, rz,, rFUNc,,
This is done by pressing the "#" and "5" keys. Here, "X", "Y", and "Z" are unlock codes, that is, encryption codes set in advance by the user, etc. By setting unlock codes in this way, unauthorized registration by a third party can be prevented. , destruction of registered data, etc. is prevented.

When the registration mode is set in this manner, the automobile T and the talking device 100 temporarily stop functioning as a telephone. In other words, it becomes impossible to receive or originate calls. This prevents the registration operation from being disturbed by incoming calls, etc., and allows correct registration. In addition, when the registration mode is set in this way, the LCD display 452 displays a message indicating whether or not to cancel the registration mode set in this way after the LOCKJ display blinks and the rPWR display lights up. Confirmation is performed (step 1303).

This is done by operating a predetermined key in the key portion 430'. For example, to cancel the registration mode, rFU
Nc", rcLRJ key is pressed (step 1304). Note that when the registration mode is canceled in this way, each part will be in the state at the time of resetting (
Step 801). On the other hand, if the above-mentioned release operation is not performed, the release operation is not performed and the registration mode is set.

Then, with the registration mode set in this way, it is checked whether or not to set the bank (step 1).
305). This is done by operating a predetermined key in key portion 430. For example, the bank setting operation (step 1306) is performed by pressing the rRCL, "#J, 'XJ" keys, where "X" is "
1” or “2” key, “3” to “9”, “0”
”, r#J, and “*” are set as prohibited keys. Incidentally, bank setting means to register data to be registered, that is, telephone numbers, divided into a plurality of groups, and to perform voice recognition during voice dialing, which will be described later, in units of groups (banks). In the above example, if the bank setting is made with "X" set to "1", registration will be performed in bank "1", and "X"
When bank setting is done by “2”, bank “2”
Registration will take place. Then, during voice recognition, bank “1”
If ' is specified, recognition is performed based on the registered data of bank "1" only, and if bank "2" is designated, recognition is performed based on the registered data of bank "2" only. However, by making bank settings like this, 1
A plurality of users can perform voice dialing according to data based on each user's utterance using the car telephone device 100, and speedy and reliable voice dialing becomes possible.

Furthermore, the convenience of voice dialing can be improved by allowing one user to use different banks according to predetermined conditions, such as for company use or personal use.

Next, it is confirmed whether or not to cancel the data of the already registered voice dialing party (step 1307), which is canceled by operating a predetermined key in the key section 430 (step 13).
H), Note that such cancellation is not performed when no key operation is performed.

Furthermore, in this car telephone device 100, there are a batch cancellation mode and an individual cancellation mode as modes for performing such cancellation. For example, the operation for setting the batch cancel mode is performed by pressing the "STO", "#", and "0" keys. By setting the batch cancellation mode in this way, all the data of all the registered parties to be voice dialed, that is, the data related to the telephone number of the other party and the data related to the registered voice corresponding thereto, can be canceled all at once ( By being able to perform batch cancellation in this way, the data before batch cancellation will not remain, and the occurrence of erroneous dialing due to data remaining can be prevented. Further, the setting of the individual cancel mode is performed by pressing the rsTOJ, "X", and "Y" keys. Here, "X", "Y"
is a registered address set for each data of the other party to be voice dialed, which will be described later. By allowing individual cancellation in this way, it becomes possible to individually cancel, for example, registered data that is no longer used or is no longer needed.

After this, the telephone number of the person to be voice dialed is set (step 1309), and this is done by a predetermined key operation in key section 430 (step 1310).
For example, this operation can be done by pressing the other party's phone number with the number keys "0" to [9], or by pressing rRCL if the other party's phone number has been set in advance by speed dial.
, key and then press the speed dial with the number keys "0" to "9". Note that the telephone number set in this manner is displayed on the liquid crystal display 452, and user confirmation is performed.

Thereafter, a registered address corresponding to the telephone number set as described above is set (step 1311).

This is done by a predetermined key operation in the key section 430 (step 1312), for example,
This is done by pressing the rsTOJ, rXJ, and "Y" keys. Here, "X" and "Y" are "0"
~ "This is the registered address indicated by the number key 9j. When the registered address is set in this way, the speaker 4
92 outputs a predetermined ringing sound to inform the user that, for example, a two-digit address corresponding to a nine-digit telephone number has been registered.

When the predetermined @ moving sound is output in this way, the name, name, etc. of the other party corresponding to the telephone number set as described above is then registered by voice (Step 1).
313) At that time, if any key in the key part 430 is pressed (step 1314), the state becomes the state when setting the registration mode (step 1315, step 1302).
), so that if the user makes an incorrect utterance, by pressing any key, the user can return to the initial setting of the registration mode.

Voice registration is performed by generating voice twice (step 1316, step 1317). First, when the user utters the first voice, for example, "office"
When the voice is uttered, if the utterance darkness is within a predetermined time (for example, 1 second), a beep sound is sounded twice. This indicates that the first user's utterance has been accepted.

The user hears these two beeps and makes a second utterance. When the second utterance is accepted, a message indicating that the voice has been registered, such as a message saying "Thank you," is sent along with the step. The telephone number set as 130 is output by voice synthesis. When voice registration is completed in this way, the user will receive rFUNc and rc
Press the LRJ key to cancel registration mode. At this time, it is assumed that the input level is different when the voice recognition unit 350a generates the voice for the first time and the time for the second time,
These signals having different levels are used as audio data to be registered.

When the voice registration is performed in this manner, the telephone number set as described above is displayed on the liquid crystal display 452, and the voice of this telephone number is generated by the voice synthesis section 350b and output from the speaker 492.

This allows the user to confirm the registered telephone number, and prevents erroneous calls caused by erroneous registration.

Next, the voice dialing operation will be explained based on the flowchart shown in FIG.

First, if the bank is set (step 140
1) Specify the set bank (step 1402). This is performed by operating a predetermined key in key section 430. For example, the operation is rR(
This is done by pressing the "L", "#", and "X" keys. Here, "X" is a numeric key of "1" or "2", and these numeric keys of "1" and "2" correspond to bank "1" and bank "2", respectively. Note that the bank number designated in this way is displayed on the liquid crystal display 452, and confirmation by the user is performed.

Next, the voice dial mode (hereinafter referred to as recognition mode) is set (step 1403), which is performed by operating a predetermined key in the key section 430. For example, this operation is performed by pressing down any of the numeric keys in key portion 430 for a predetermined period of time or more, for example, one second or more. Note that when the recognition mode is set in this way, the ringing sound when a key is pressed becomes different from the normal sound, and the user is notified that the recognition mode is set by the ringing sound from the speaker 492 (step 1404).
), and the recognition mode continues for a predetermined period of time, for example, 6 seconds - At this time, the recognition mode setting signal (H level signal) generated by a predetermined key operation is input to the OR time 1?8422b via the control unit 418 in FIG. be done.

When the recognition mode is set in this way, the state of the mode transition flag becomes "1" and the voice uttered by the user is recognized. It is possible to reset the recognition mode or cancel the recognition mode (step 14).
05, step 1406). For example, when any of the ten keys in the key section 430 is pressed for a predetermined period of time, for example, one second or more, the recognition mode is reset. In other words, by pressing the numeric keypad for a predetermined period of time, all previous voice recognition results are cleared and the speaker 49 is activated again.
A ringing sound is generated from 2. This is possible even during voice recognition (step 1407), so if the user utters an incorrect voice or wants to change the call destination, the recognition mode can be easily reset and voice dialing can be performed again. Become. Also, if you want to cancel, press 1 on either numeric keypad.
Recognition mode is canceled if the button is pressed for less than a second.

When the user makes a sound (Stella 71408)
The voice is recognized by the voice recognition unit 350a, the corresponding telephone number is accessed, and the call flag is set to "1" to indicate that the user intends to make a call (step 1409).
, the telephone number thus accessed is displayed on the liquid crystal display 452.
At the same time, the voice of this telephone number is generated by the voice synthesis section 350b and output from the speaker 492.

This allows the user to authenticate the phone number,
So-called mistaken calls are prevented.

Thereafter, a predetermined period of time e.g.
When the seconds have elapsed, a call is automatically made using the telephone number accessed as described above (steps 1410 and 1411). That is, step 1206 in FIG.
After it is determined that there is an intention to make a call, the channel to which the calling signal should be sent is captured, and after confirming the intention to make a call, the telephone number information recognized by the voice recognition unit 350a is transmitted via this channel. The operation is similar to the operation of sending out a calling signal including at least one. This is done after a predetermined period of time has elapsed after the notification of the recognition result of the call, so that the above-mentioned telephone number of the user is confirmed during this period. Note that if the notified phone number information, which is the recognition result, is not the user's desired phone number, proceed to step 1.
409) Whether to reset or cancel the recognition mode by pressing the numeric keypad for a predetermined time (step 1406)
, t or rEND.

When a key is pressed, processing such as canceling the call is performed, and a call interruption instruction signal is generated. Further, a call can be made by performing a predetermined operation in the key section 430 before the automatic call is made.

For example, this operation is performed by pressing the "rSEND" key before making an automatic call. In this way, by being able to make a call without repeating automatic calls, the time required to make a call can be shortened.

[Effects of the Invention] As explained above, according to the wireless telephone device of the present invention, it is possible to prevent the voice signal level at the beginning of a voice from decreasing during voice recognition, thereby ensuring that voice recognition is performed reliably. A message will be sent.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing the configuration of a car phone device according to an embodiment of the present invention, Fig. 2 is a diagram showing an example of mounting the 200 car phone device, and Fig. 3 is a radio device of this car phone device. FIG. 4 (a> is a block diagram showing the structure of the voice dial section of the radio of this car telephone device,
4th G? I(t)) is a circuit diagram showing the configuration of a part of the voice recognition section of the voice dial section of this car telephone device, and FIG. 5 shows the configuration of the voice recognition mLsI of the voice dial section of the radio of this car phone device. The block diagram shown in FIG. 6 is the voice synthesis LSI of the voice dialing section of this car telephone device.
7 is a circuit diagram showing the configuration of the telephone of this car phone device, FIG. 8 is a flowchart showing the connection control operation of this car phone device, and FIG. 9 is a connection diagram of this car phone device. A flowchart showing the operation when the power is turned on during the control operation, Country 10 is a flowchart showing the operation at the time of initialization during the connection control operation of this car phone device, and Fig. 11 is a flowchart showing the operation at the time of initialization during the connection control operation of this car phone device. Flowchart 1- shows the subsequent operation, FIG. 12 is a flowchart showing the operation when making a call during the connection control operation of this car phone device, and FIG. 13 shows the operation when registering voice dialing of this car phone device. Flowchart FIG. 14 is a flowchart showing the operation of this car telephone device when recognizing a voice dial. 200...Antenna 300...Radio device 310...Radio unit 330...Audio/control unit 350...
...Voice dial section 350a...Voice recognition section 351...B/U (balanced/unbalanced) converter 351a, 412b, 42 l b ...=--Balance line 351b...Unbalanced Line 352... Bypass filter 353... Amplifier 354... A G C circuit 357... Voice recognition LSI 358... RAM 400... ...': I:, Talking device 412.421... U/B (unbalanced/balanced) converter 494... Hands-free microphone 496...
...Handset microphone applicant Co., Ltd.
Toshiba Representative Patent Attorney Sasa Suyama - Figure 9, Figure η

Claims (1)

[Claims] (1) a voice input means; a voice recognition means that recognizes the voice input to the voice input means; and when a voice is being input to the voice input means, the function of the voice input means is activated; A voice that stops the function of the voice input means when no voice is input to the voice input means and activates the function of the voice input means when no voice is input to the voice input means during voice recognition. a switch means; a number storage means for storing a telephone number corresponding to a predetermined voice; a telephone number corresponding to the voice recognized by the voice recognition means is read from the number storage means and a call is made according to the telephone number; 1. A wireless telephone device comprising: a transmission means.