JP2000022564A - Receiver, cordless telephone set slave unit, facsimile equipment with cordless telephone set and cordless automatic answering telephone set - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce radio wave interference received by a high frequency processing part from an oscillator, to improve reception sensitivity and to ensure operation by using software. SOLUTION: The high frequency processing part, a voice recognition part provided with the oscillator for recognizing the voice of a user obtained through a microphone 1 and outputting voice guidance through a speaker 2 and a control part for monitoring the operation state of a device, judging whether or not processing of the voice recognition part can be temporarily stopped and stopping the oscillator based on the judged result are provided. For instance, it can be stopped at the time of 'key input time', 'operation transition time' and 'voice guidance time'. The radio wave interference between the oscillator and the high frequency processing part is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a receiver having a high-frequency processing unit and a processing unit including an oscillator, and more particularly to a cordless telephone handset, a facsimile apparatus with a cordless telephone, and a cordless answering machine.

[0002]

2. Description of the Related Art A conventional cordless telephone is disclosed, for example, in Japanese Patent Laid-Open No. 4-324726. The publication discloses that a DTMF signal generating means is provided in a slave unit,
In the wireless telephone device configured to transmit the DTMF signal from the DTMF signal generating means to the master unit, a mute data generating unit is provided in the slave unit, and when transmitting the DTMF signal from the slave unit to the master unit, The mute data from the mute data generating means is also transmitted to the master unit. The master unit is provided with mute signal generating means for receiving the mute data and generating a mute signal, and outputs a DTMF signal sent to the telephone line unit through a noise reduction circuit for a predetermined time by a signal from the mute signal generating means. A technique for muting is disclosed.

[0003]

In recent years, cordless telephones have become increasingly multifunctional, and products equipped with a voice recognition function and enabling dialing by a user's voice have been sold. In such an apparatus, a microcomputer (CPU) for performing conventional control in general
In addition, it is necessary to mount a dedicated IC for performing voice recognition. Generally, the CPU and the voice recognition IC each require a dedicated oscillator, and these oscillators generate signals having different frequencies. In such a case, it is conceivable that interference occurs between a signal generated by the voice recognition IC and the high-frequency module. If the oscillation frequency of the voice recognition IC and the transmission / reception frequency of the cordless telephone interfere with each other, the reception sensitivity of the cordless telephone may be reduced. When such a phenomenon occurs, a radio wave connection request event (Incoming Call
Or page), the CPU may not be able to confirm it. That is, a situation may occur in which the slave unit cannot respond to an event having a high priority (for example, Incoming Call).

[0004] In recent years, many facsimile (FAX) machines with a cordless telephone have become widespread for convenience. These FAX machines are compatible with the G3 standard.
00 bps is the mainstream, and in order to satisfy this specification, a high-frequency oscillator is used in the control part of the FAX machine. However, the use of such high frequencies may interfere with cordless telephone connection frequencies. If no countermeasures are taken in FAX, the effect of the frequency of the oscillator of the FAX machine control unit
This leads to lower connection rates and lower call quality. In order to solve this problem, conventionally, a frequency that may be affected is checked in advance, and measures are taken to prevent the control unit of the cordless telephone from using the frequency (CH). However, such a measure reduces the frequency (the number of channels) that can be actually used, and consequently lowers the connection rate.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and by using software means, it is possible to reduce radio wave interference received by a high-frequency processing unit by an oscillator, improve reception sensitivity, and An object of the present invention is to provide a receiver, a cordless telephone handset, a facsimile apparatus with a cordless telephone, and a cordless answering machine that can ensure the operation.

[0006]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a high frequency processing unit, a processing unit including an oscillator, and the occurrence of radio interference between the oscillator and the high frequency processing unit. And a control unit for temporarily stopping the oscillator when the operation is performed.

[0007] Preferably, the control unit temporarily stops the oscillator when the processing of the processing unit is not required.

[0008] A cordless telephone handset according to the present invention comprises:
A high-frequency processing unit, including an oscillator, recognizing a user's voice obtained through a microphone, outputting a voice guidance through a speaker, and monitoring the operation state of the device to temporarily process the voice recognition unit. And a control unit for stopping the oscillator based on a result of the determination, thereby reducing radio wave interference given to the high-frequency processing unit by the oscillator.

Preferably, the control unit determines whether the state of the apparatus is a key input state, and stops the oscillator when the apparatus is in the key input state.

Preferably, the control unit stops the oscillator when the operation state of the voice recognition unit transitions between the voice recognition state and the voice guidance state.

Preferably, the control unit stops the oscillator between successive voice guidances.

A facsimile apparatus with a cordless telephone according to the present invention comprises: a cordless telephone section including a high-frequency processing section and a processing section including a first oscillator; a facsimile section including a control section including a second oscillator; And a control unit for temporarily stopping at least one of the first oscillator and the second oscillator when radio wave interference occurs with the facsimile unit.

Preferably, the control unit temporarily stops the oscillator that does not require processing.

A cordless answering machine according to the present invention includes a high-frequency processing unit, a digital signal processing unit for recording and reproducing voice including an oscillator, and radio interference between the oscillator and the high-frequency processing unit. A control unit for temporarily stopping the oscillator.

Preferably, the control section temporarily stops the oscillator when the processing of the processing section is not required.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 of the Invention An embodiment of the present invention will be described with reference to the drawings. A wireless communication device such as a cordless telephone handset has a voice recognition function,
Therefore, a description will be given by taking an example of an apparatus equipped with a voice recognition IC that requires a unique oscillator.

FIG. 1 is a functional block diagram of a cordless telephone handset according to Embodiment 1 of the present invention. Microphone 1
The audio signal input from the transmission processing unit (TX) 3 is subjected to processing such as amplification and the like, and then input to the high frequency (RF) module 5. The signal received by the antenna 1 is subjected to demodulation processing by the RF module 5 and further to a reception processing unit (RX)
After the processing such as amplification is performed in 4, the signal is output to the speaker 2. The main CPU 8 controls the TX 3, the RX 4, and the RF module 5, and receives a signal from a key switch group 7 used for dialing and performs predetermined processing such as dialing. The CPU 8 also performs a process for setting or canceling the voice recognition IC to the sleep state. The CPU 8 includes an oscillator 9 for generating a signal for the operation. The device according to the first embodiment of the present invention
Further, it includes a voice recognition IC 10 and its oscillator 11. The voice recognition IC 10 recognizes a user's voice signal input from the microphone 1, performs predetermined control via the CPU 8 or directly, and outputs necessary voice guidance through the speaker 2. The CPU 8 monitors the operation state of the voice recognition IC, and outputs an operation state control signal to set or cancel the sleep state of the voice recognition IC. These operations will be described later. As shown in FIG. 1, depending on the oscillation frequency f2 of the oscillator 11 of the voice recognition IC 10, it may interfere with a signal transmitted and received by the RF module 5.

FIG. 2 is a functional block diagram of a base station (base unit) that communicates with the cordless telephone handset of FIG. This base station has a network controller (NC)
U) 22 to a public line. In FIG. 2, TX 23, RX 24, RF module 25, antenna 26, key 27, CPU 28, and oscillator 29
This is the same or equivalent part as that shown in FIG.

FIG. 3 is a flowchart for explaining the operation. FIG. 4 is a detailed flowchart of the sleep determination (S2) of FIG.

FIG. 5 is a timing chart for explaining the operation.

In the following description, the CPU 8 provided in this apparatus may be referred to as a master station. Further, the voice recognition IC 10 may be expressed as a slave station.

When the reception sensitivity of the cordless telephone handset is suppressed by the oscillation of the voice recognition IC, that is, the actual reception frequency or its intermediate frequency (IF)
If the signal is an integral multiple of the transmission frequency of the voice recognition IC, even if a telephone connection request event (Incoming Call, page, etc.) occurs from the cordless telephone base unit, it will be confirmed on the slave unit side. May be difficult to do.

Therefore, in the embodiment of the present invention, an oscillation stop mode such as a sleep mode for stopping the oscillation of the speech recognition IC serving as the slave station is provided periodically or as needed, so that the speech recognition IC is provided. The oscillation of the oscillator is stopped to improve the receiving sensitivity. That is, the operation status of the apparatus is monitored to determine whether or not the voice recognition IC serving as the slave station can be stopped. If the voice recognition IC can be stopped, the voice recognition IC is stopped. The following is a specific example. In the sleep mode, the operation of the voice recognition IC is only temporarily stopped, so that the operation can be resumed immediately after the oscillator resumes oscillation and the sleep mode is released.

A cordless telephone handset having a voice recognition function at the time of key input is also provided with a key matrix for inputting a dial number like a general telephone. When the user performs input using the key matrix, there is no need to operate the voice recognition IC. Therefore, the host CPU issues a command for entering the sleep mode to the voice recognition IC (the slave station 2).
03). Upon receiving this command, the voice recognition IC enters the sleep mode and stops the oscillation of its oscillator (FIG. 5 (a)).

After the key input is completed, if it is necessary to operate the voice recognition IC again, the master station 201 sends the slave station 20
The sleep cancel command is issued to the third party.

Note that the master station 201 must always perform a reception channel scan (channel search) even during the sleep mode including the operation of the voice recognition IC.

In a cordless telephone handset having a voice recognition function, another operation (eg, a dial operation) may be performed after voice recognition. When the other operation does not require the processing of the voice recognition IC, the voice recognition IC can be set to the sleep mode as in the case described above.

There are cases where another type of operation (for example, a guidance operation) is performed from the voice recognition operation at the time of the operation transition . There may be some intervals between the speech recognition operation and other types of operations, and even if the intervals do occur, there is no inconvenience for the user. Therefore, a sleep period can be provided at this interval.

For example, when the user registers a speed dial, the user recognizes the voice of the user, and then prompts the user to input the voice guidance. This example can be applied to such a case (FIG. 5B).

Even when there is no predetermined operation mode that makes the operation of the voice recognition IC unnecessary, such as waiting for a key input at the time of voice guidance , for example, a sleep period can be provided at the time of a state transition. By performing the following processing, it is possible to provide a sleep period to such an extent that the user does not feel uncomfortable with the actual operation.

A voice guidance (speech S)
synthesis) function. If the user performs some operation in accordance with the voice guidance and this operation does not require voice recognition, the voice recognition IC can be put to sleep during the period in which the user performs the operation. Further, even when voice guidance is continuously performed, such a sleep time can be provided at a break between sentences of a plurality of voice guidances (FIG. 5C).

For example, when the voice recognition IC provides a guidance of "memory registration mode. Please enter a dial number." And requests the user to enter a dial number, a predetermined sleep period is provided after the guidance. Can be provided. This period is predetermined, for example, corresponding to a standard time for the user to input a dial number. Alternatively, it is possible to provide a sleep period in a silence period that occurs between the above-mentioned guidance “memory registration mode” and “enter a dial number” (FIG. 5C).

As a matter of course, the sleep period may be provided in smaller intervals within a range in which the sense of incongruity does not occur. For example, "Memory""Registrationmode""Dialnumber""Pleaseenter."
It is conceivable to divide as follows.

Next, the outline of the operation will be described with reference to the operation flowchart of FIG. When the operation of the apparatus is started, the CPU 8 monitors the operation state of the apparatus (S1). In the example of FIG. 1, the CPU 8 monitors the operation state of the voice recognition IC 10. Next, the CPU 8 determines whether sleep is possible based on the monitoring result of S1 (S2). This processing is performed, for example, at the time of “key input” and “at the time of operation transition” described above.
This is for determining whether or not “at the time of voice guidance”. This processing will be described in further detail later. If it is determined in step S2 that sleep is possible (YES), the process proceeds to step S3, where the voice recognition IC 10
Set to sleep mode. If the sleep state has already been set, the processing is passed. Otherwise (N
O), proceed to step S4 to release the sleep state.
If the sleep state has not been set, the processing is passed. Note that the sleep state refers to a state in which the oscillator 11 stops.

Next, the details of the processing for determining whether sleep is possible will be described with reference to the operation flowchart of FIG. First, it is determined whether the operation of the voice recognition IC is unnecessary (S21). For example, it is determined that the operation of the voice recognition IC is unnecessary during key input as shown in FIG. Next, it is determined whether the operation state is in transition (S22).
For example, when shifting from the voice recognition to the guidance operation as shown in FIG. Next, it is determined whether a wait is possible (S23). For example, when it is possible to provide an interval between guidances as shown in FIG. 5C, it is determined that the wait is possible. In FIG. 4, the processing is performed in the order of S21, S22, and S23, but the processing is not limited to this order.

As described above, according to the embodiment of the present invention, when the processing of the slave station is not required or when it can be temporarily stopped (for example, "at the time of key input", "at the time of operation transition", "voice guidance" Time), the oscillator of the slave station is stopped and the sleep mode is set, so that interference between the oscillation signal of the slave station and the transmission / reception signal of the device can be reduced, so that a command from the master unit cannot be received and the reception sensitivity is reduced. Can be eliminated or reduced. Therefore, it is possible to ensure the operation of the device.

Also, since the embodiment of the present invention can be realized by software, hardware and system aspects such as shielding the oscillator, providing a filter, and changing the frequency so as not to interfere with each other are provided. No special measures are required. However, it is also possible to use both the countermeasure according to the embodiment of the present invention and hardware and system countermeasures, and a synergistic effect can be expected.

Embodiment 2 of the Invention The first embodiment of the present invention has been described by taking a cordless telephone handset with a voice recognition function as an example. Embodiment 2 of the present invention will be described using a facsimile (FAX) as an example.

FIG. 6 is a functional block diagram of the device according to the second embodiment of the present invention. 6, the NCU 22 to the oscillator 29 are the same as or correspond to those shown in FIG. NCU 22 to oscillator 29 constitute a cordless telephone. On the other hand, the image sensor 31 to the oscillator 39 constitute a FAX. The image signal read by the image sensor 31 is binarized by a binarization circuit 32 and temporarily stored in a line memory 33. After being encoded by the encoding / decoding circuit 34 and modulated by the modem 35, it is transmitted through the NCU 22. On the other hand, data transmitted through the public line is input to the encoding / decoding circuit 34 via the modem 35. The decrypted data is temporarily stored in the line memory 33 and then printed by the print unit 36. The controller 40 corresponds to the CPU 8 in FIG. 1, and monitors the operations of the CPU 28 and the control unit 38 to grasp the operation states of the cordless telephone and the facsimile machine. Further, the controller 40 can send an operation state control signal to the CPU 28 and the control unit 38 to control these operation states (for example, to set a sleep mode).

In the facsimile apparatus with a cordless telephone shown in FIG. 6, the oscillator 39 of the control unit 38 may interfere with the RF module 25. The transmission speed of the facsimile machine corresponding to the G3 standard is mainly 14400 bps.
In order to cope with this, the oscillator 39 generates a high-frequency signal, so that the possibility of interference is particularly high.

Therefore, when the facsimile machine does not need to operate, the controller 40 for stopping the oscillation circuit of the facsimile machine can reduce the radio wave interference. For example, the controller 40 stops the oscillation of the oscillator 39 and puts the control unit 38 into a sleep mode when a telephone call is being made, a key input is being made, or the like. As a result, there is no need to limit the frequency (the number of channels) that can be used in the cordless telephone, and a cordless telephone with a fax having a sufficient connection rate and communication quality can be provided.

Conversely, the CPU 28 of the cordless telephone may be in the sleep mode during the fax operation. When the controller 40 detects that the FAX operation is being performed, the controller 40 stops the oscillation of the oscillator 29 and puts the CPU 28 into the sleep mode. in this way,
By stopping the oscillation circuit of the cordless telephone during the fax operation, it is possible to reduce data errors at the time of fax reception.

Embodiment 3 of the Invention The present invention can be applied to other devices. For example, digital signal processing (DSP)
In a cordless answering machine that realizes an answering machine by a function, the DSP may be set to a sleep mode during a period in which the DSP does not need to operate for recording or reproducing a message. Conversely, the DSP may be activated (set to the non-sleep mode) only when the DSP needs to operate.

A high-frequency oscillator is used for the DSP, which may have an adverse effect on the connection frequency of the cordless telephone as in the case of the FAX.
By providing a controller that stops the oscillation of the oscillator when the operation of P is unnecessary, a product that does not adversely affect the frequency used in the cordless telephone can be provided.

In the above description, the contents of the present invention have been described by taking as an example a combination of a cordless telephone and a voice recognition IC, and a combination of a facsimile apparatus and a cordless control unit. However, the present invention is not limited to these. The present invention is also applicable to wireless communication terminals other than cordless telephones and facsimile machines, for example, transceivers and mobile phones. In short, the present invention can be applied to any device in the case where there is an oscillator of a slave IC, which causes radio wave interference.

Further, in this specification, means does not necessarily mean physical means, but also includes a case where the function of each means is realized by software.
Further, the function of one unit may be realized by two or more physical units, or the function of two or more units may be realized by one physical unit.

[0047]

As described above, according to the present invention, when radio wave interference occurs between the oscillator and the high-frequency processing unit,
With a control unit to temporarily stop the oscillator, when the processing of the processing unit including the oscillator is not required,
By temporarily stopping the oscillator, it is possible to reduce radio wave interference received by the high-frequency processing unit by the oscillator and to improve reception sensitivity.

Further, since the present invention can be realized by software, there is no particular need for hardware measures such as shielding the oscillator, providing a filter, or changing the frequency so as not to interfere.

[Brief description of the drawings]

FIG. 1 is a functional block diagram of a cordless telephone handset according to Embodiment 1 of the present invention.

FIG. 2 is a functional block diagram of the cordless telephone base unit according to Embodiment 1 of the present invention.

FIG. 3 is a flowchart for explaining the operation of the first embodiment of the present invention.

FIG. 4 is a flowchart illustrating a detailed operation of a step of determining whether sleep is possible in FIG. 3;

FIG. 5 is a timing chart for explaining the operation of the first embodiment of the present invention.

FIG. 6 is a functional block diagram of a facsimile apparatus with a cordless telephone according to Embodiment 2 of the present invention.

[Explanation of symbols]

 Reference Signs List 1 microphone 2 speaker 3, 23 transmission processing unit (TX) 4, 24 reception processing unit (RX) 5, 25 high frequency (RF) module 6, 26 antenna 7, 27 key switch 8, 28 CPU 9, 29 CPU oscillator 10 Voice recognition IC 11 Oscillator of voice recognition IC 22 Network control unit (NCU) 40 Controller

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) H04M 11/00 303 H04B 7/26 M 5K101 H04N 1/00 109M F term (reference) 5C062 AA02 AA12 AA37 AB38 AB46 AB47 AC21 AE11 AE14 BA00 5K027 AA12 BB03 5K039 AA08 BB05 5K052 AA02 BB01 DD04 FF11 GG22 5K067 AA03 AA24 BB00 BB08 DD52 EE02 EE32 5K101 KK01 LL14

Claims (10)

[Claims] 1. A reception apparatus comprising: a high-frequency processing unit; a processing unit including an oscillator; and a control unit for temporarily stopping the oscillator when radio interference occurs between the oscillator and the high-frequency processing unit. Machine. 2. The receiver according to claim 1, wherein the control unit temporarily stops the oscillator when the processing of the processing unit is not required. 3. A high-frequency processing unit, including an oscillator, for recognizing a user's voice obtained through a microphone,
A voice recognition unit that outputs voice guidance through a speaker, and monitors the operation state of the device to determine whether the processing of the voice recognition unit can be temporarily stopped, and based on the determination result, stops the oscillator. A cordless telephone handset, comprising: a control unit; and reducing radio wave interference given to the high-frequency processing unit by the oscillator. 4. The cordless telephone handset according to claim 3, wherein the control unit determines whether the state of the apparatus is a key input state, and stops the oscillator when the apparatus is in the key input state. 5. The cordless telephone according to claim 3, wherein the control unit stops the oscillator when the operation state of the voice recognition unit changes between the voice recognition state and the voice guidance state. Cordless handset. 6. The cordless handset according to claim 3, wherein the control unit stops the oscillator between continuous voice guidances. 7. A cordless telephone unit including a high-frequency processing unit and a processing unit including a first oscillator, a facsimile unit including a control unit including a second oscillator, and radio wave interference between the cordless telephone unit and the facsimile unit. A facsimile apparatus with a cordless telephone, comprising: a control unit for temporarily stopping at least one of the first oscillator and the second oscillator when the error occurs. 8. The facsimile apparatus with a cordless telephone according to claim 7, wherein the control unit temporarily stops an oscillator that does not require processing. 9. A digital signal processing unit including a high-frequency processing unit, an oscillator for recording and reproducing sound, and temporarily stopping the oscillator when radio interference occurs between the oscillator and the high-frequency processing unit. Cordless answering machine provided with a control unit for stopping the operation. 10. The cordless answering machine according to claim 9, wherein the control unit temporarily stops the oscillator when the processing of the processing unit is not required.