JPH06164447A - Radio communication equipment - Google Patents

Abstract

PURPOSE:To prevent such an inconvenient case where the conversation between two prescribed persons is bugged by an outside by outputting the conversation through a speaker only when the input voice signal is coincident with the registered voice signal. CONSTITUTION:The received voice signal 10 is given to a voice recognizing circuit 6 through a receiver circuit 2 and turned into a digital signal by an A/D converter circuit 7. Then a voice control circuit 9 decides whether the digital signal is coincident or not with a voice pattern (registered voice signal) stored in a storage circuit 8. If so, the coincident digital signal is given to the circuit 1 as a voice recognizing/deciding signal 11. The circuit 1 secures the connection to a voice circuit 4 by the coincident signal and outputs the received voices 3 through a speaker 5. Meanwhile the connection of the circuit 4 is cut and the voice signals delivered from the speaker 5 are inhibited if no coincident signal is recognized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless communication device having a squelch function or a carrier wave detecting function.

[0002]

2. Description of the Related Art In recent years, a wireless communication device such as a cordless telephone or a low power transceiver which does not require a license has been rapidly spread. Among them, for example, FIG. 5 shows a transceiver applied by the present applicant in Japanese Patent Application No. 4-205333. In this figure, a signal from another transceiver is received by a receiving circuit 41, and a received call signal is amplified by a speaker 43 via a voice circuit 42.
The audio signal from the microphone 44 is transmitted from the transmission circuit 45 via the audio circuit 42. The channel setting switch 46 can set nine channels, and the control circuit 4
7 outputs the channel number data based on the setting of this switch 46. When the talk switch 48 is OFF, the control circuit 47 operates only the receiving circuit 41,
Only the transmission circuit 45 is operated when it is ON.

[0003]

However, in the transceiver described above, the communication channel is defined as 9 channels, and there are many users per one communication channel. Therefore, when two people are talking, a third party's communication is performed. There is a drawback to receiving. Further, in the transceiver described above, even if a carrier wave is input from a third party who is not a predetermined partner while waiting for reception, intermittent reception is stopped and the reception state is entered, which causes a problem that power consumption increases and the battery life of the built-in battery is shortened. is there. Therefore, the present invention has been made to solve the above-mentioned drawbacks.

[0004]

In order to solve the above-mentioned problems, the present invention provides a wireless communication having a receiving circuit and a transmitting circuit, wherein a voice signal registered in advance and an input voice signal are inputted. And a control circuit for permitting output to the speaker when the voice signal is input and determined to match the registered voice signal.

The present invention further includes a control circuit that repeats an intermittent reception mode in which it is determined whether a carrier wave is input through a receiving circuit within a predetermined time and then the determination is suspended within a predetermined time. A voice recognition circuit that determines whether or not the registered voice signal and the voice signal in the carrier wave match, and it is determined that the carrier wave is input and that the voice signal matches the registered voice signal. The control circuit for stopping the intermittent reception mode is provided only when the time.

[0006]

As described above, according to the present invention, the voice signal is output from the speaker only when it is determined that the voice signal is input and coincides with the registered voice signal, so that a call of an unregistered third party is not received. Further, according to the present invention, since the speaker outputs the carrier wave only when it is determined that the carrier wave is input and coincides with the registered voice signal, the intermittent reception is continued even if the carrier wave is input from a third party who is not registered. Power consumption does not increase.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIG. FIG. 1 is a block diagram of a wireless communication device (for example, a transceiver) according to this embodiment. In FIG. 1, the control circuit 1 is composed of, for example, a one-chip microcomputer, and is composed of a CPU for 4-bit parallel processing, a ROM in which a program is written, and a RAM having a work area. It controls the whole transceiver. The receiving circuit 2 is a circuit for receiving a transmission signal from another transceiver, and the received audio signal 3 is supplied to the audio circuit 4 and reproduced via the speaker 5.

The voice recognition circuit 6 includes an A / D circuit 7 for converting an analog voice signal into a digital signal, a storage circuit 8 for storing a voice pattern converted into a digital signal, and a voice control circuit 9 for controlling these. It is configured.
The voice recognition circuit 6 determines whether or not the received voice signal 10 and the voice signal registered in advance match, and gives the result to the control circuit 1 as a voice recognition determination signal 11.

The squelch circuit 12 is composed of, for example, a noise squelch, and determines whether or not there is an audio signal 13 in the received carrier, that is, whether or not the audio signal 13 matches the value set by the user. To judge. The result is given to the control circuit 1 as a squelch determination signal 14. As described above, the squelch circuit 12 determines the presence / absence of an audio signal having a voltage of a certain level or higher in the carrier wave. Alternatively, a tone squelch may be used as the squelch circuit 12.

The transmission circuit 15 is a circuit for transmitting to another transceiver, and is configured to transmit a voice signal converted into an output signal by the microphone 16 via the voice circuit 4. The PLL synthesizer 17 is configured to give a local oscillation signal corresponding to the channel number data 18 from the control circuit 1 to the receiving circuit 2 and also a transmission carrier signal to the transmitting circuit 15. The channel setting switch 19 is a rotary switch and can set 9 channels a to i. In Japan, nine frequency bands near 400 MHz are permitted for transceivers. The control circuit 1 outputs the channel number data 18 based on the setting of the switch 19.

The talk switch 20 is of an automatic reset type, for example, and the control circuit 1 sends the transmission circuit 15 when it is off.
, The PLL synthesizer 17 is controlled so that the receiving circuit 2 tunes to a predetermined channel, and O
When N, the control circuit 1 disables the receiving circuit 2 and the transmitting circuit 15 controls the PLL synthesizer 17 so as to transmit on a predetermined channel. The voice registration mode switch 21 is for digitizing the voice signal 22 from the microphone 16 or the received voice signal 10 by the A / D circuit 7 and storing it in the storage means 8 when it is ON. The display 23 is for displaying the status of the transmission / reception channel, the squelch function, and the like.

When the squelch determination signal 14 indicating that the voice signal 13 is input and the voice recognition determination signal 11 indicating that the voice signal 10 matches the registration signal are also input to the control circuit 1, the speaker 5 A control signal 24 that permits output to the audio circuit 4 is input to the audio circuit 4. The transceiver 25 is composed of the above components.

Next, the operation of the transceiver 25 will be described with reference to FIGS. FIG. 2 is a flowchart of a main part of the transceiver 25. First, this transceiver 2
When two users, each of whom has the number 5, make a call, for example, the channel setting switch 19 is set to the b channel. This b channel is assumed to be predetermined among users. An operation will be described when a voice pattern is stored in the storage circuit 8 during a call by the users or a voice input by the microphone 16. When the transceiver 25 of the user in the receiving state detects the carrier wave on the set channel b, the squelch circuit 1
If 2 operates and the audio signal 13 matches the set value,
A squelch coincidence signal 26 is given to the control circuit 1 as the squelch determination signal 14.

Further, the received voice signal 10 is given from the receiving circuit 2 to the voice recognition circuit 6 and converted into a digital signal by the A / D circuit 7 and stored in the storage circuit 8 as a voice pattern (registered voice signal). The voice control circuit 9 determines whether or not they match.
Is determined under. When a match between the received voice signal 10 and the voice pattern stored in the storage circuit 8 is detected, the voice recognition match signal 27 is output as the voice recognition determination signal 11.
Are provided to the control circuit 1. The control circuit 1 connects the voice circuit 4 by the voice recognition coincidence signal 27 to connect the speaker 5 to the speaker 5.
The received voice 3 is controlled to be output via. If there is no voice recognition coincidence signal 27 (case 28 in FIG. 2), the voice circuit 4 is disconnected and the voice signal from the speaker 5 is prohibited.

In the above embodiment, the squelch circuit 12
However, the squelch circuit 12 may not be provided in some cases. Also in the latter case, since the voice is output from the speaker only when the voice recognition circuit 6 determines that the voice signal matches the registered voice signal, a call from an unregistered third party is not received. Calls are undisturbed.

Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 3 is a block diagram of the transceiver according to the present embodiment. The control circuit 29 includes a carrier wave detection unit 30 and a control unit 31.
Consists of. The carrier wave detection unit 30 has a predetermined time (for example, 30
It is determined whether or not the carrier wave 32 from the receiving circuit 2 is input at 0 msec), and then the intermittent mode in which the determination is suspended for a predetermined time (for example, 1 to 2 sec) is repeated. As a result, the carrier wave determination signal 33 that the carrier wave 32 is present is sent from the carrier wave detector 30 to the controller 31, and the voice recognition judgment signal 11 that the voice signal 10 in the carrier wave 32 matches the registered voice signal is controlled. The control signal 34 sent to the unit 31 and permitting the output to the speaker 5 is input to the audio circuit 4. In FIG. 3, the same numbers as those in FIG. 1 indicate the same parts or the same signals. The transceiver 35 is composed of these components.

The operation of the transceiver 35 will be described with reference to FIGS. FIG. 4 is a flowchart of the main part of the transceiver 35. In the case of performing intermittent reception, when the carrier wave 32 is detected on the set channel b, the carrier wave detection unit 30 operates and gives the carrier wave coincidence signal 36 as the carrier wave determination signal 33 to the control unit 31. Further, the received voice signal 10 is given from the receiving circuit 2 to the voice recognition circuit 6, and it is determined whether or not it matches the registered voice signal. If they match, the voice recognition judgment signal 11 is used as the voice recognition matching signal 2
7 is supplied to the control circuit 29.

When the voice recognition intermittent reception mode is selected by the user, the control circuit 29 stops the intermittent reception mode by the input of the carrier wave coincidence signal 36 and the voice recognition coincidence signal 27 to bring it into the reception state. . If there is no voice recognition coincidence signal 27 (case 37 in FIG. 4), the intermittent reception mode is continued.

[0019]

As described above, the present invention causes the speaker to output only when it is determined by the voice recognition circuit that the registered voice signal matches. Therefore, since the call from the unregistered third party is not received, the call between predetermined persons is not disturbed.

Further, according to the present invention, the discontinuous reception mode is stopped only when it is determined that the carrier wave is input and coincides with the registered voice signal. Therefore, even if the carrier wave is input from an unregistered third party, Power consumption does not increase because intermittent reception continues. Therefore, the life of the built-in battery is extended.

[Brief description of drawings]

FIG. 1 is a block diagram of a wireless communication device according to a first embodiment of the present invention.

FIG. 2 is a flowchart of a main part of the wireless communication device according to the first embodiment of the present invention.

FIG. 3 is a block diagram of a wireless communication device according to a second embodiment of the present invention.

FIG. 4 is a main part flowchart of a wireless communication device according to a second embodiment of the present invention.

FIG. 5 is a block diagram of a conventional wireless communication device.

[Explanation of symbols]

 1, 29 control circuit 2 reception circuit 4 voice circuit 5 speaker 6 voice recognition circuit 12 squelch circuit 15 transmission circuit 30 carrier wave detection unit

Claims (2)

[Claims] 1. A voice recognition circuit for determining whether or not a voice signal registered in advance matches an input voice signal in a wireless communication having a receiving circuit and a transmitting circuit, and the voice. A wireless communication device comprising a control circuit that permits output to a speaker when a signal is input and it is determined that the signal matches the registered voice signal. 2. In a wireless communication system having a receiving circuit and a transmitting circuit, it is determined whether a carrier wave is input through the receiving circuit within a predetermined time, and then within a predetermined time. A control circuit that repeats the intermittent reception mode that suspends the determination, a voice recognition circuit that determines whether or not a pre-registered voice signal and a voice signal in the carrier wave match, and it is determined that the carrier wave is input. A radio communication device comprising the control circuit for stopping the intermittent reception mode only when it is determined that the voice signal matches the registered voice signal.