KR970011413B1 - Auto-loop system of a telephone - Google Patents

Abstract

The apparatus and method for automatic loop-off during speaker phone communication senses the communication status and interrupts the speaker phone function at the end of the communication. The automatic loop-off apparatus, which sends the detection signal to the microprocessor when silence is continuous for more than the specified time, includes number keys for dialing, a key input unit(10) which includes a speaker phone key and special keys to accomplish desired functions, a microprocessor(20) to control the overall dynamics of the telephone and generate the control signal that turns the telephone loop and the speaker circuit on and off, a telephone communication circuit(30) which forms the telephone loop for communication with the other end of the line, a speaker phone circuit(40) which makes up the speaker phone loop, a microphone(50), a speaker(60), and a communication status detection unit(70).

Description

Automatic loop off device and method for speakerphone calls on the phone

1 is a block diagram of an automatic loop-off device during speakerphone communication of a telephone according to the present invention.

2 is a flowchart illustrating an automatic loop-off process during a speakerphone call of a telephone according to the present invention.

* Explanation of symbols for main parts of the drawings

10: key input unit 20: microprocessor

30: telephone call circuit 40: speaker phone circuit

50: microphone 60: speaker

70: call state detection unit

The present invention relates to a speakerphone call method of a telephone, and more particularly, to an apparatus and a method for automatically looping off a speakerphone call of a telephone to automatically complete a speakerphone operation when silence during a call duration and a predetermined time is maintained during a speakerphone call.

In general, the speakerphone function of the telephone is a convenient function that a user can receive using the built-in speaker and transmit using the built-in microphone without using a handset when making or receiving a call.

However, the speakerphone function is turned on / off using the speakerphone key provided in the telephone. Even though the call is completed during the call with the speakerphone function, if the speakerphone function is not inadvertently turned off using the speakerphone key, the speakerphone function is continuously turned on. By holding, there was a problem of not receiving.

Accordingly, the present invention has been made in order to solve the problems of the prior art as described above, and when the call state is detected by the speakerphone call, it is automatically determined to return to the phone standby state by stopping the speakerphone function. It is an object of the present invention to provide an automatic loop off device and method for speakerphone calls of a telephone.

According to an aspect of the present invention for achieving the above object, a key input unit for performing a desired operation of the phone having a special key including a numeric key for telephone number dialing, a speakerphone key for speakerphone calls, A microprocessor which controls overall operation of the telephone based on an input signal from the key input unit, and generates a control signal for turning on / off a telephone loop and speakerphone circuit based on the speakerphone input signal from the key input unit; A telephone call circuit unit for forming a telephone loop for transmitting and receiving with a counterpart connected to a trunk line based on a control signal from a processor, and a speakerphone for speakerphone call connected to the telephone call circuit unit based on a control signal from the microprocessor. Soup forming a loop A speaker phone portion, a microphone connected to the speakerphone circuit portion for use as a transmission means during a speakerphone call, a speaker connected to the speakerphone circuit portion for use as a receiving means during a speakerphone call, and a speakerphone call from the speakerphone circuit portion Including a call state detection unit for detecting a call state, if the voice lasts for a busy tone or for a predetermined time, the speaker phone automatically sends a detection signal to the microprocessor to stop the speakerphone call, characterized in that automatically A loop off device is provided.

According to another aspect of the present invention for achieving the above object, in a method for controlling a telephone loop by detecting a call state when a speakerphone call with a telephone having a call state detection unit for detecting a call state, the current mode is speakerphone A process of detecting a call state through the call state detecting unit in a call mode, and determining whether a voice without any signal detection is detected during a predetermined time set in the detecting process or whether a predetermined number of busy sounds are detected And, when it is determined that the voice or the busy tone in the determination process, the call is terminated by recognizing the end of the speakerphone call and the telephone loop is turned off when the speakerphone call is made of the automatic loop off method is provided.

Other objects and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention described below with reference to the accompanying drawings by those skilled in the art.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of an automatic loop-off device during speakerphone communication of a telephone according to the present invention. As shown in the drawing, the present invention includes a key input unit 10, a microprocessor 920, a telephone call circuit unit 30, a speakerphone circuit unit 40, a microphone 50, a speaker 60, and a call state detection unit 70. ).

In FIG. 1, the key input unit 10 is provided with a special key including a numeric key for dialing a telephone number and a speakerphone key for speakerphone calls, so as to be input based on a user's operation to perform a desired operation of the telephone. It is a means for.

The microprocessor 20 controls overall operation of the phone based on the input signal from the key input unit 10, and in particular, turns on / off the telephone loop and the speaker phone circuit based on the speaker phone input signal from the key input unit 10. Generate a control signal to turn off.

In addition, the telephone call circuit unit 30 forms a telephone loop to transmit / receive with the counterpart connected to the trunk line based on the control signal from the microprocessor 20.

Meanwhile, the speakerphone circuit unit 40 is connected to the telephone call circuit unit 30 and forms a speakerphone loop for speakerphone communication based on a control signal from the microprocessor 20.

In addition, the microphone 50 is connected to the speakerphone circuit unit 40 when the speakerphone call is input, that is, when the speakerphone key of the key input unit 10 is input, and is used as a transmission means. 40 is used as a transmission means, and the speaker 60 is connected to the speakerphone circuit unit 40 during the speakerphone call to receive a reception function.

Next, the call state detecting unit 70 is a main component of the present invention, and detects a call state from the speaker phone circuit unit 40 with a voice operated transmission (VOX) at the time of a speaker phone call, and silences during a call or a set time. If it continues, it automatically sends a detection signal to the microprocessor 20 to stop the speakerphone call.

Next, an operation process of the present invention including the above-described configuration unit will be described in detail with reference to the flowcharts of FIGS. 1 and 2.

First, a telephone loop is formed through the telephone call circuit unit 30, and the voice of the call state is performed while the microphone 50, which is a transmitting means, and the receiving means are talking to the other party using the speaker 60 through the speakerphone circuit unit 40. When the detection signal is applied to the microprocessor 20 through the call state detection unit 70 via the speakerphone circuit 40, the microprocessor 20 receives the detection signal and detects the current speakerphone call (steps 200 and 202). .

Next, when the voice signal of the call with the other party is detected in step 202, the counter that counts the time duration of silence (no voice signal is detected) is cleared (step 204). In Busy Tone having a predetermined period (normally high level: 0.5 seconds, low level: 0.5 seconds) is generated, it is detected (step 208). At this time, if the busy tone is not detected, the busy tone counter is cleared and the process returns to step 202 to determine whether or not the voice signal is input.

In more detail, when the busy tone detection step is described, the busy tone has a predetermined period as described above, and thus, when the predetermined number of times (usually four times) of high level pulses are detected, the call is determined to be in a completed state.

Therefore, if the detection signal from the call state detection unit 70 is determined to be a busy tone in step 208, the number of high level occurrences of the busy tone is counted (step 214), and the counted busy tone is compared with a predetermined number of times (step 214). Step 216) controlling the speakerphone circuit 40 to turn off the speakerphone loop while stopping the set number of times (step 218), and controlling the telephone call circuit 30 to turn off the phone loop (step 220). Return to the call waiting state.

If the busy tone is not detected in the step 208, the busy tone counter is cleared (step 212), and the process returns to the step 202 to detect a continuous call state. Returning to step 202 to continue detecting a call state.

On the other hand, if the voice signal is not detected in step 202, that is, when silence is detected, the silence duration time is counted (step 206), and the predetermined silence duration time (for example, 10 to 20) is set. (Step 210), if the set silence duration is exceeded, step 218 turns off the speakerphone loop and turns off the phone loop to return to the call waiting state.

On the contrary, if the mute duration time counted in step 210 is smaller than the set mute duration, the flow returns to step 202 to detect a continuous call state.

As described above, according to the present invention, it is possible to provide more convenience to the user by automatically turning off the telephone loop by detecting this when the call is completed during the speakerphone call in the telephone.

Claims (3)

A key input unit for performing a desired operation of the phone, comprising a numeric key for dialing a phone number, a special key including a speaker phone key for a speakerphone call, and controlling overall operation of the phone based on an input signal from the key input unit. And a microprocessor for generating a control signal for turning on / off a telephone loop and a speakerphone circuit based on the speakerphone input signal from the key input unit, and transmitting and receiving with a counterpart connected to a trunk line based on the control signal from the microprocessor. A telephone call circuit portion for forming a telephone loop, a spuff phone circuit portion connected to the telephone call circuit portion and forming a speakerphone loop for speakerphone calls based on a control signal from the microprocessor; Circuit A microphone connected to be used as a transmission means, a speaker connected to the speakerphone circuit unit for a speakerphone call and used as a receiving means, and a call state detection unit for detecting a call state during speakerphone call from the speakerphone circuit unit; When the voice lasts for a busy period or a predetermined time, the automatic loop-off device for speakerphone calls of the phone, characterized in that for transmitting the detection signal to the microprocessor to automatically stop the speakerphone call. A method of controlling a telephone loop by detecting a call state during a speakerphone call with a phone having a call state detector for detecting a call state, wherein the call state is detected through the call state detector when the current mode is a speakerphone call mode. Detecting a voice, if there is no signal detected during the predetermined time set in the detection process, or a predetermined number of busy voices are detected, and if it is determined that the voice or the voice busy during the determination process A method of automatically looping off a speakerphone call of a telephone comprising a process of stopping a speakerphone call and turning off a telephone loop by recognizing that the call is ended. The method of claim 2, wherein the determining of the mute and the busy tone comprises: counting a mute duration counter when there is no signal detection from the call state detector, and determining whether the mute duration is equal to or greater than a predetermined mute duration. When a signal is detected from the call state detection unit, the silence time counter is initialized to determine whether the call is busy during a predetermined period. Automatic loop-off method for phone speakerphone calls, characterized in that consisting of a process.