JPH02188048A - Radio telephone set with muted sound sending circuit - Google Patents

Abstract

PURPOSE:To enable an opposite telephone set to confirm muting with a constant sound even when a radio telephone set such as an automobile telephone set is in a line muting state by composing the telephone set of a muting command transmitting operation part, a control part, a DTMF sound generation part, and a transmission control part, and performing muted sound transmission. CONSTITUTION:The automobile telephone set 21 and opposite telephone set 6 are connected through a telephone network 5 and when the telephone line needs to be put in a muting state on the automobile telephone set side, a muting command is inputted from the operation part of the automatic telephone set. A control part 2 sends out a control indication for sending a prescribed muted sound to a DTMF sound generation part 3. The DTMF sound generation part 3 outputs a DTMF sound at constant intervals according to the control signal. The DTMF sound which is outputted at constant intervals is sent to the opposite telephone set 6 through a telephone network 5 by a transmission control part 4.

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention provides a method for preventing speech from being transmitted from a wireless telephone such as a car phone to the other party's telephone during a call by performing certain operations. The present invention relates to a radio telephone having a mute state sound transmitting circuit that conveys a mute state sound to the other party's telephone with an audible sound.

(Prior Art) Radio telephones such as car telephones are in practical use. In order to prevent the voice from being transmitted from the wireless telephone to the other party's telephone during a call, certain operations must be performed on such telephones, but if this operation is performed, no sound is transmitted to the other party's telephone, and the state is silent. is formed.

(Problem to be Solved by the Invention) When this silent state is formed, the other party may mistakenly think that the telephone is malfunctioning, which is unfriendly.

On the other hand, some wired telephone communications have a function (hold function) that transmits a predetermined melody while not transmitting one's own voice and also preventing the other party's voice from being received.

It is conceivable that a melody can be emitted as described above in wireless telephone communication, but in order to play a melody, the necessary components must be installed. However, mobile phones, where priority is given to reducing size and weight, have the disadvantage that they become larger due to the increased number of parts.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned drawbacks, and to provide a radio telephone having a circuit that can send out a muted alarm sound when muted without increasing the number of parts.

(Means for Solving the Problems) In order to achieve the above object, the wireless telephone according to the present invention is a wireless telephone such as a mobile telephone or a car telephone, and has the following features:
An operation unit for issuing a mute command to send a mute warning sound to inform the other party's telephone that no transmission is being made during a call, and a fixed period of time D after a certain silence period according to the mute command.
A control unit that performs control to transmit a TMF sound and generate a muffled warning sound formed by repeating this, and a DT that generates a DTMF sound according to the control of the control unit.
It includes an MF sound generator and a transmission control unit that sends the output of the DTMF sound generator to a telephone network.

(Example) Hereinafter, the present invention will be explained in more detail with reference to the drawings.

FIG. 1 is a circuit diagram showing an embodiment of a wireless telephone having a muted state sound transmission circuit according to the present invention. car phone 21
and the other party's telephone 6 are connected via the telephone network 5, and if it becomes necessary to temporarily mute the telephone line on the car phone side during a call, a mute command is input from the operation section of the car phone.

The control unit 2 sends a control instruction to send out a predetermined muffled warning sound to D.
It is sent to the TMF sound generator 3. The DTMF sound generator 3 outputs DTMF sound at regular intervals according to the control signal.

The DTMF sound output at regular intervals is sent by the transmission control section 4 to the other party's telephone 6 via the telephone network 5.

FIG. 2 is a flowchart showing details of the control section.

When a mute command is issued from the telephone operating section 1, the process starts (step 11), and it is determined whether a call is currently in progress (step 12). If the call is not currently in progress, the process ends at that point. If the call is in progress, a predetermined silent time T seconds is set (step 13). Next, it is determined whether the silent time T seconds has elapsed (step 14). If the silent time T seconds has not yet elapsed, it is checked whether the mute command continues (step 15). Note that the mute command is set, for example, by pressing a button on the operating section once, and is canceled by pressing it again. If the mute command has been canceled, the process ends. If the mute command is still set, it is determined whether or not a call is in progress (step 16), and if the call is not in progress, the process ends. If the call is in progress, it is determined again whether the silent time T seconds has elapsed (step 14).

This routine formed by steps 14, 15 and 16 is effective when a long silent period is set.

If the silent time T seconds has elapsed, it is determined again whether or not a call is in progress (step 17); if the call is not in progress, the process is terminated. If the call is in progress, a predetermined DTMF sound generation time is set to seconds (step 18). Then DTM
An F sound generation instruction is issued (step 19). The DTMF sound generation instruction is sent to the DTMF sound generation unit 3, and when the DTMF sound generation unit 3 generates the DTMF sound for t seconds, it is checked whether the mute command continues (step 20).
), if the mute command has already been canceled, the process ends at that point, and as a result, the DTMF sound is transmitted for t seconds. If the mute command continues, the process returns to step 12 and the same operation as above is repeated. When such an operation is repeated, the DTMF sound generating section 3 repeatedly outputs a signal for transmitting a DTMF sound for t seconds, a silent period for T seconds, and then transmitting a DTMF sound for an additional t seconds. Therefore, the transmission control unit 4 sends the muted alarm sound emitted in this way to the telephone 6 via the telephone network 5.
Send to.

FIG. 3 is a diagram showing an example of a muted sensorineural pattern. The generation time t of the above DTMF sound is 0.25 seconds.

Initially, the silent time T is set to 0 seconds, then 0.75 seconds, and then 3.75 seconds, and this silent time is set to be repeated. The DTMF sound is 697 Hz. With this setting, the DTMF sound will be transmitted twice immediately after muting starts,
Thereafter, the pattern will be at 5 second intervals.

Note that it can be turned on/off by a special command from a key.

Although the example considered to be the most preferable pattern for the muted state sound has been described above, it is possible to implement it with any pattern.

Note that the present invention is not limited to transmitting the muted state sound, but can be widely applied by using various patterns as a means of notifying the other party of the state of the telephone, etc.

(Effects of the Invention) As described above, the present invention is composed of a mute command sending operation section, a control section, a DTMF sound generation section, and a transmission control section, and is capable of sending out a mute state sound. therefore,
Even if a wireless telephone such as a car phone mutes the line, the other party's telephone can confirm the muting with a constant sound, eliminating the risk of causing anxiety.

Furthermore, the DTMF sound generation section and the transmission control section are originally installed in a car phone, and the control section is configured to meet the purpose of the present application to control the DTMF sound generation section and transmission control section. Since it is configured to operate according to the control of the main unit, it is possible to transmit the mute state sound with a slight modification without adding any parts to the circuit that generates the melody installed in wired telephones. It is possible.

Therefore, it is possible to realize a wireless telephone such as a car telephone that is small and lightweight and can transmit a muted state sound.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing an embodiment of a radio telephone having a muted state sound transmission circuit according to the present invention, and FIG. 2 is a flowchart for explaining details of the control section of FIG. 1. FIG. 3 is a diagram showing a specific example of a muted state sound pattern. ■... Telephone operating section 2... Control section 3... DTMF sound generating section 4... Transmission control section 5... Telephone network 6... Telephone 21... Car phone diagram patent applicant Daini Denden Co., Ltd. Agent Patent Attorney Hisashi Inoro Figure 3 Mute space

Claims (1)

[Claims] In a wireless telephone such as a mobile phone or a car phone, an operation unit for issuing a mute command to send a mute state sound to inform the other party's telephone of a non-transmitting state during a call;
A control unit that performs control to transmit a DTMF sound for a certain period of time after a certain silence period according to the muffling command, and generate a muffling state sound formed by repeating this, and according to the control of the control unit, D that generates DTMF sound
1. A radio telephone comprising: a TMF sound generator; and a transmission controller that sends the output of the DTMF sound generator to a telephone network.