JPH09149100A - Telephone - Google Patents

Abstract

(57) [Abstract] [Problem] Telephone which the listener hears the noise generated by the contact between the handset and the handset when the handset ends the call and returns the handset to the handset fixing part of the telephone body. The purpose is to provide. SOLUTION: In a telephone, a word frequently emitted at the end of a call is coded and stored in a registered word storage unit 11, a word in a normal call is processed by a voice recognition processing unit 12, and a registered word storage unit 11 is processed. The control unit 13 lowers the amplification factor of the amplifier 7 as compared with the information stored in. When the speaker utters the registered word and ends the call, the noise generated by the contact between the handset 1 and the telephone body 5 when returning the handset 1 to the handset fixing portion of the telephone body 5 is:
Since the amplification factor of the amplifier 7 is lower than the amplification factor during the normal call, the listener hears it while being relatively reduced compared to the normal call.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone having a noise reduction function.

[0002]

2. Description of the Related Art In recent years, the recognition rate of a specific speaker and a specific word has been improved by the progress of voice recognition technology, and a telephone having a voice recognition function has been developed.

Although noise is a problem during a call, as a general method for reducing noise, a method of canceling noise by radiating an antiphase sound wave of noise has been devised.

FIG. 4 shows a circuit block diagram of a conventional telephone. In FIG. 4, 27 is a handset as a component, 28 is a speaker in the handset 27, and 29 is a microphone. Reference numeral 30 denotes a telephone body, which includes amplifiers 31 and 32, a codec 33, a line circuit section 34, a control section 36, and an on-hook switch 37.
And an operation unit 38 including a dial button, a mode switch, and the like. In addition, 35 in the figure
Is a telephone line.

Next, the relationship and operation of each constituent element of the conventional telephone composed of the above constituent elements will be described. The voice signal input through the telephone line 35 is the line circuit unit 3
4, converted into an analog signal through the codec 33,
It is amplified by the amplifier 31 and emitted as a sound wave from the beaker 28.

On the other hand, the transmitted voice input to the microphone 29 of the handset 27 is widened by the amplifier 32 and the codec 3
The signal is converted into a digital signal in 3 and becomes a transmission signal through the line circuit section 34 and is transmitted to the telephone line 35. The amplification factor of the amplifier 32 is constant, and the control unit 36 does not control the amplification factor.

When the talker terminates the call and returns the handset 27 to the handset fixing portion of the telephone body 30, the on-hook switch 37 is short-circuited, so that the voice of the talker is not transmitted to the receiver and the on-hook state is established. .

[0008]

However, in the above-described conventional telephone structure, the handset 27 is set in the handset fixing portion of the telephone body 30 when the talker ends the call and is in an on-hook state in which the call is not transmitted to the receiver. To return to the above, the telephone main body 30 and the handset 27 come into contact with each other, and the contact sound becomes noise. Hereinafter, this noise is referred to as contact noise.

The contact noise is sent from the microphone 29 of the handset 27 through the amplifier 32, the codec 33, and the line interface through the telephone line 35 to the listener at the same amplification factor as that during a normal call before the on-hook state. This contact noise causes a discomfort to the listener.

The present invention is intended to solve the above problems, and it is an object of the present invention to provide a telephone which reduces the noise at the time of contact and does not make the listener uncomfortable.

[0011]

Means for Solving the Problems As a first means for achieving the above object, the present invention is, in a telephone body having a voice recognition function, a storage unit for registering a word frequently used at the end of a call and a speaker. Has a control means for identifying whether or not the word emitted by is a word registered in the storage unit, and the word emitted by the speaker is
When the word matches the word registered in the storage unit, the control means can control the amplification factor of the amplifier for amplifying the voice from the microphone of the handset.

As a second means for achieving the above object, the present invention has a timer function of returning the amplification factor of the amplifier to the original state after a lapse of a certain time after controlling the amplification factor in the first means. However, the time can be set by using the dial buttons on the telephone body.

As a third means for achieving the above object, the present invention has a function of generating an antiphase sound wave with respect to the frequency having the maximum frequency component of contact noise, and fixes the handset to the handset of the telephone body. When the control unit detects that the anti-phase sound wave has been returned, the speaker for anti-phase sound wave generation is arranged at a position where the anti-phase sound wave can be generated.

According to the present invention, it is possible to obtain a telephone which reduces the noise during contact and does not cause the listener to feel uncomfortable.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is, in a telephone, a voice recognition processing unit capable of encoding voice recognized by a speaker and recognizing it as a word, and amplifying an input of a microphone of a handset. The amplifier that can control the amplification factor, the registered word storage unit that registers the word that the talker frequently uses at the end of the call, and the amplifier that identifies whether the word emitted by the talker is the word registered in the storage unit When the word uttered by the speaker matches the word registered in the storage unit, the control unit controls the amplification factor of the amplifier so that the amplification factor of the amplifier is normally controlled. It is lower than the amplification factor used for talking, and when returning the handset to the handset fixed part of the phone body, the noise generated by the contact between the phone body and the handset is relatively reduced compared to the normal call. It will be heard in the speaker.

According to a second aspect of the present invention, in a telephone, a voice recognition processing unit capable of encoding a voice uttered by a speaker and recognizing it as a word, and a timer function capable of setting a time by a dial button of the telephone body. An amplifier that can control the amplification factor that amplifies the input of the microphone of the handset, a registered word storage unit that registers words that the talker frequently uses at the end of the call, and words that the talker utters are registered in the storage unit. And a control unit capable of controlling the amplification factor of the amplifier by discriminating whether or not it is a word, and the control unit controls the amplification factor of the amplifier when the word uttered by the speaker matches the word registered in the storage unit. Doing so lowers the amplification factor of the amplifier below that during normal communication, and when returning the handset to the handset fixed part of the telephone body, the telephone body and the handset come into contact with each other. Noise is heard by the listener when it is reduced relative to the normal call sound, and the amplification factor of the amplifier is restored to the original state after a certain time has elapsed after controlling the amplification factor. The noise generated by the contact between the telephone body and the handset when returning to the handset fixing portion of the main body is relatively reduced compared to the normal call and can be heard by the listener.

According to a third aspect of the present invention, in the telephone, the reverse frequency storing the maximum frequency component of contact noise generated when the telephone body and the handset contact each other when returning the handset to the handset fixing portion of the telephone body. Phase sound wave part, on-hook switch that is short-circuited when the handset is returned to the handset fixing part of the phone body, sensor part that is cut off when the handset is returned to the handset fixing part of the phone body, the phone body and the handset contact Equipped with a speaker placed in a position where the anti-phase sound wave of contact noise can be generated, and the peak frequency component of the contact noise is the anti-phase emitted from the speaker placed in a position that can generate the anti-phase sound wave of the contact noise. The contact noise, which is canceled by the sound waves and input to the microphone, reduces the noise level and is transmitted to the listener. Is obtained by way, also the noise telephone body and the handset when returning the handset to the handset fixed part of the telephone body contact occurs is, become audible to the listener with relatively reduced with respect to the normal call.

FIG. 1 shows an embodiment of the present invention.
This will be described with reference to FIG. (Embodiment 1) FIG. 1 shows a circuit block diagram of a telephone according to the present invention. In FIG. 1, reference numeral 1 denotes a handset as a component, which is composed of speakers 2, 4 and a microphone 3. Reference numeral 5 is a telephone main body, and amplifiers 6, 7, 17
, Codecs 8 and 18, line circuit section 9, registered word storage section 11, voice recognition processing section 12, and control section 13
, The on-hook switch 14, and the sensor unit 15 that is cut off when the handset 1 is returned to the telephone body 5.
, An anti-phase sound wave section 16, and an operation section 19 including a dial button, a mode selector switch, and the like.
Reference numeral 10 in the figure is a telephone line.

The relationship and operation of each constituent element of the telephone composed of the above constituent elements will be described.

In the above-mentioned telephone, an operating section 19 composed of a dial button and a mode changeover switch
With the operation of, the registered word storage standby state is performed, and a word frequently uttered at the end of the call is uttered toward the microphone 3. The registered word is coded by the amplifier 7 and the codec 8 by the amplifier 7, processed by the voice recognition processing unit 12, and stored in the registered word storage unit 11 via the control unit 13. The above is performed in advance, and a call is made in the normal call state by operating the operation unit 19.

The following description will be made on the case where the speaker utters the word stored in the registered word storage unit 11 during the talk.
The word being spoken by the talker is amplified by the amplifier 7, coded by the codec 8 and processed by the voice recognition processing unit 12,
When the coded voice information is transmitted to the control unit 13 and is judged to be the same by comparison with the information stored in the registered word storage unit 11, the control unit 13 lowers the amplification factor of the amplifier 7.

Since the speaker returns the handset 1 to the handset fixing portion of the telephone body 5 when the call is finished,
The contact noise is generated and input to the amplifier 7 through the microphone 3, but the contact noise sent to the receiver through the telephone line 10 through the codec 8 and the line circuit unit 9 is detected by the amplifier 7.
Since the amplification factor of 1 is lower than the amplification factor of a normal call, the contact noise heard by the listener is relatively lower than that of a normal call.

(Second Embodiment) In the telephone of the second embodiment, after the amplification factor of the amplifier 7 described in the first embodiment is lowered, the amplification factor of the amplifier 7 is returned to a normal call after a lapse of a certain time. It has a function, and the time can be set with the dial button of the operation unit 18.

Therefore, the speaker utters the word registered in the registered word storage unit 11 except when the call is finished, and the amplification factor of the amplifier 7 is lowered, so that the word uttered by the speaker is not transmitted to the receiver side. The situation is avoided.

(Third Embodiment) As shown in FIG. 1, the telephone according to the third embodiment has an antiphase sound wave portion 16 of the maximum frequency component obtained as a result of frequency analysis of noise at the time of contact. Since the talker has finished the call, when the handset 20 is returned to the telephone body 21 as shown in FIG. 2, the on-hook button 22 is lowered and the on-hook switch 23 is short-circuited, or the sensor unit 24 such as light or infrared is cut off. By doing so, the control unit 13 shown in FIG.
Is returned to the telephone main body 21 and it is determined that noise is generated at the time of contact, and the information stored in the anti-phase sound wave unit 16 is converted into an analog signal through the codec 18, amplified by the amplifier 17, and emitted as a sound wave from the speaker 4. To be

Then, as shown in FIG. 3, the handset 2
Since the speaker 26 is arranged at a position where the antiphase sound wave B of the contact noise A of 0 can be generated, the peak frequency component of the contact noise A is canceled by the antiphase sound wave B and the microphone 25
Since the input noise is input to, the contact noise with the reduced noise level is transmitted to the listener.

[0027]

As is apparent from the above description, according to the present invention, in a telephone body having a voice recognition function, a storage unit for registering a word frequently used at the end of a call and a word issued by a speaker are stored. If the word uttered by the speaker matches the word registered in the memory, the control means amplifies the voice from the microphone of the handset. It is possible to control the amplification factor of the amplifier, and also has the function of generating a sound wave of the frequency with the maximum frequency component of the noise at the time of contact, and the speaker for anti-phase sound wave generation is installed at the position where the anti-phase sound wave can be generated. By arranging it, there is an effect that the noise at the time of contact between the main body and the handset transmitted to the listener is reduced. Also,
The telephone has a timer function to return the amplification factor of the amplifier to the original state after a certain time has elapsed after controlling the amplification factor, and the time setting can be set by the dial button on the telephone body. The effect that the situation in which the speaker utters a word registered in the registered word storage section except when the call ends and the voice of the speaker is not transmitted to the receiver side because the amplification factor of the amplifier is reduced is avoided. Have.

[Brief description of the drawings]

FIG. 1 is a circuit block diagram of a telephone of the present invention.

FIG. 2 is a schematic cross-sectional view of the main part of the telephone.

FIG. 3 is an explanatory diagram of noise cancellation in the same telephone.

FIG. 4 is a circuit block diagram of a conventional telephone.

[Explanation of symbols]

 1 handset 2, 4 speaker 3 microphone 5 telephone body 6, 7, 17 amplifier 8, 15 codec 9 line circuit section 10 telephone line 11 registered word storage section 12 voice recognition processing section 13 control section 14 on-hook switch 15 sensor section 16 reverse phase Sound wave section 18 Operation section 19 Operation section

Claims (3)

[Claims] 1. A voice recognition processing unit capable of encoding a voice uttered by a talker and recognizing it as a word, an amplifier capable of controlling an amplification factor for amplifying an input of a microphone of a handset, and a talker frequent at the end of a call. The speaker is equipped with a registered word storage unit for registering words to be used for, and a control means capable of identifying whether or not the word emitted by the speaker is a word registered in the storage unit and controlling the amplification factor of the amplifier. If the word matches the word registered in the storage unit, the control means controls the amplification factor of the amplifier so that the amplification factor of the amplifier is lower than that during normal communication, and the handset is set to the handset of the telephone body. A telephone which is characterized in that the noise generated when the telephone body and the handset are brought into contact with each other when returning to the fixed portion is relatively reduced as compared with a normal call so that the listener can hear. 2. A voice recognition processing unit capable of encoding a voice uttered by a speaker and recognizing it as a word, a timer function capable of setting a time by a dial button of a telephone body, and an amplification factor for amplifying an input of a microphone of a handset. The amplifier that can be controlled, the registered word memory that registers the words that the speaker frequently uses at the end of the call, and the word that the speaker speaks are identified whether they are registered in the memory or not, and the amplification factor of the amplifier is determined. When the word uttered by the talker matches the word registered in the storage unit, the control unit controls the amplification factor of the amplifier to normally communicate the amplification factor of the amplifier. The noise generated by contact between the handset and the handset when returning the handset to the handset fixed part of the handset is reduced relative to the normal call sound when the handset is returned to the handset. Hear, telephone and returning to the original state the amplification factor of the amplifier after the lapse constant after controlling the gain time. 3. An anti-phase sound source section that stores the maximum frequency component of contact noise generated by contact between the telephone body and the handset when returning the handset to the handset fixing portion of the telephone body, and the handset to the handset fixing portion of the telephone body. An on-hook switch that is short-circuited when returned, a sensor part that is shut off when the handset is returned to the handset fixing part of the phone body, a position where antiphase sound waves of contact noise generated when the phone body and handset contact can be generated , The peak frequency component of the contact noise is canceled by the anti-phase sound wave emitted from the speaker placed at the position where the anti-phase sound wave of the contact noise can be generated and input to the microphone. A telephone that is characterized in that reduced contact noise is transmitted to the listener.