KR20070072792A - Method and device for reproducing sound signal in a phone terminal capable of playing sound - Google Patents

Abstract

The present invention relates to the reproduction of a sound signal in a phone terminal capable of playing sound, and in particular, when a call is requested while the sound signal is being played in the terminal, a call notification sound is raised step by step to inform the user, and when the call is connected, the sound being played. Provided are a method and apparatus for mixing and outputting a signal and a voice signal received through the call.

When a call is requested while the terminal is reproducing a sound signal, the terminal reduces the vocal band of the sound signal and adjusts only the background sound to output the volume. At the same time, the incoming notification sound is gradually increased and mixed with the background sound. When the call button is selected and the call is connected, the incoming call notification sound stops, and the voice signal received through the call is clearly enhanced and mixed with the reproduced background sound by adjusting the volume. The mixed signal is output through an output means such as a stereo speaker or an ear set.

Description

Method and apparatus for reproducing sound in a telephone terminal supporting voice communication

1 is a block diagram of a telephone terminal according to the prior art.

2 is a block diagram of a telephone terminal according to a preferred embodiment of the present invention.

3 is a flowchart showing a reproducing operation of a sound signal according to a preferred embodiment of the present invention.

4 is a block diagram of a telephone terminal according to another embodiment of the present invention.

5 is a flowchart showing an operation of reproducing a sound signal according to another embodiment of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone terminal supporting voice calls, and more particularly, to a method and apparatus for reproducing a sound signal during a call when an incoming call is generated to the terminal.

Telephone terminals are being developed to include various multimedia functions in order to satisfy the development of technology and various needs of users. Among the various functions of the terminal, the most commonly used is the function of reproducing sound such as music in the telephone terminal. Recently, due to the development of various contents, only a phone terminal can receive and play a sound that they want to hear anytime and anywhere. In general, a telephone terminal stops the sound function and starts a call when a call is received while the sound is being played, or adjusts the volume of the sound being played and outputs the voice together with the other party's voice.

In general, the sound conversion in the terminal means to stop the sound being played or to reduce the volume of the sound and connect the call. In FIG. 1, a terminal having a general sound conversion function is structurally shown.

As shown, the terminal connects the control unit 115, the memory unit 110, the display unit 105, the key input unit 100, the receiver 125, the transmitter 120, the receiver 125 and the transmitter 120. The duplexer 130, an audio unit 165, and an output unit 160 are included. The audio unit 165 includes a vocoder 135, a sound mixer 140, a codec 155, a sound player 145, and a volume controller 150 as a collection of devices related to sound conversion.

Here, the operation of each of the above components will be described based on the sound conversion function.

The controller 115 shown in FIG. 1 performs the overall control operation of the terminal, and in particular, processes the sound conversion function as described below.

The sound player 145 reads sound data held by the memory unit 110 of the terminal and receives an incoming call to the receiver 120 through the duplexer 130 while playing a sound signal. The volume controller 145 adjusts the volume of the sound signal being reproduced by the volume controller 150 so as not to be louder than the voice received through the incoming call. At the same time, the display unit 105 displays the phrase informing the incoming call, " a call has arrived. &Quot;

When the call button is pressed by the user in the key input unit 100, the voice signal of the other party entering the receiver 125 is input to the vocoder 135 via the controller 115. The volume control sound signal and the voice signal from the vocoder 135 are mixed in the sound mixer 140, transmitted to the codec 155, decoded, and output. The output signal is output from the output unit 160 to an earset or a speaker.

In the telephone terminal according to the related art as described above, when the user wants to make a call while listening to a sound, the volume of the sound signal is reduced and mixed with the received voice signal, but the vocal band of the sound signal overlaps the voice signal There was an uncomfortable problem that caused the confusion during the call because the voice was not clearly heard.

The present invention devised to solve this problem provides a method and apparatus for reproducing sound during a call in a telephone terminal.

In a preferred embodiment of the present invention, in a method for converting a sound signal in a telephone terminal capable of sound reproduction,

Reducing the vocal band of the sound signal to be reproduced;

Enhancing the clarity of the voice signal received through the call;

Mixing the sound signal with the reduced vocal band and the clear voice signal;

And outputting the mixed signal so that a user can listen.

The apparatus of the present invention, in the audio device of the terminal for converting the sound being reproduced,

A vocoder for decoding the voice signal of the other party received through the call;

A speech intelligibility enhancer for enhancing the intelligibility of the audio signal output from the vocoder;

A sound player for receiving sound data input from the controller and outputting a sound signal;

A vocal band reducer for reducing a vocal band of a sound signal output from the sound reproducer;

A sound mixer for mixing the voice signal with enhanced voice clarity and the sound signal from which the vocal band is removed;

A codec for decoding the mixed signal;

And an output unit for outputting the decoded signal.

The foregoing has outlined rather broadly the features and technical advantages of the present invention in order that those skilled in the art may better understand the detailed description of the invention that follows.

Additional features and advantages of the invention will be described hereinafter which form the subject of the claims of the invention. Those skilled in the art should recognize that the disclosed concepts and specific embodiments of the invention may be readily used as a basis for modifying or designing other structures for achieving the same purposes of the present invention. Those skilled in the art should also recognize that structures equivalent to the invention do not depart from the spirit and scope of the broadest form of the invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, detailed descriptions of well-known functions and configurations that may obscure the gist of the present invention will be omitted.

An important aspect of the present invention is that when a telephone terminal receives a call while playing a sound, the phone terminal removes the vocal band from the sound signal to be reproduced and mixes with the sound signal from which the vocal band has been removed while the incoming call sound is gradually increased. Announce that you are here. When the call button is selected and the call is connected, the incoming call stop sound is stopped and the vocal band is removed and the sound signal received through the call is mixed and output. Here, the sound includes music that can be played on the phone terminal, game background sound or sound effect, movie sound, and the like.

2 is a block diagram of a telephone terminal according to a preferred embodiment of the present invention.

Here, the case where the telephone terminal can output the sound signal and the voice signal only in the mono mode, that is, the case where the stereo ear set or the speaker is not provided in the telephone terminal. This telephone terminal will hereinafter be referred to as a mono terminal.

The configuration diagram shown in FIG. 2 only shows a part which is considered to be important for the operation of the mono terminal. The rest of the configuration of the mono terminal is omitted. The solid line represents the flow of the voice signal and the sound signal, and the dotted line represents the control operation.

As shown in FIG. 2, the control unit 200, the audio unit 260, and the output unit 255 are configured as shown in FIG. 2. Vocoder 205, voice clarity enhancer 210, volume adjuster 215, sound player 220, vocal band reducer 225, volume adjuster 230, incoming call sound player 235, The volume controller 240, the sound mixer 245, and the codec 250 are configured.

The controller 200 shown in FIG. 2 performs the overall control operation of the mono terminal and processes the sound conversion function as described below.

If the incoming call is input to the controller 200 through a receiver (not shown) while the sound player 220 reads out sound data held by a memory (not shown) of the mono terminal and reproduces a sound signal, the vocal band The reducer 225 processes the sound signal output from the sound reproducer 220 such that only the vocal band is reduced. The volume controller 230 adjusts the volume so that the vocal band reduced signal received from the vocal band reducer 225 is not greater than the voice received through the incoming call.

The incoming notification sound player 235 reads out the predetermined incoming notification sound data among the incoming notification sound data held for the incoming call notification, and outputs it as the incoming notification sound for informing the user of the incoming call.

At this time, the incoming notification sound is output through the volume controller 240 so that it is gradually raised rather than being reproduced loudly.

Herein, the controller 200 determines the controlled volume of the vocal band reducer 225 and the volume controller 230, and controls the operations of the vocal band reducer 225 and the volume adjuster 230.

When a call button is selected by a user and the call is connected, the call notification sound is stopped and the call is connected, and the voice signal received through the call is input to the vocoder 205 via the control unit 200. The voice signal output through the vocoder 205 is processed by the voice clarity enhancer 210 to make the voice more clear, and the volume is adjusted by the volume controller 215.

The controller 200 determines the controlled volume of the voice clarity enhancer 210 and the volume controller 215, and controls the operations of the voice clarity enhancer 210 and the volume controller 215. Here, the voice intensifier enhancer 210 raises the tone of the voice signal output from the vocoder 205 so that the human ear reacts sensitively, so that the voice is clear even in a place where voice other than voice is loud. do. Specific operations for enhancing speech intelligibility will be determined according to the vocoding algorithm used, but will be omitted here in order not to distract from the important subject matter of the invention.

Here, if the user can fully recognize the voice of the other party only by enhancing the clarity of the voice signal, reducing the vocal band of the sound signal, and enhancing the clarity of the voice signal, the controller 200 controls the volume controllers. It is possible to control the volume control amount of the (215) 230 to '0', or bypass or omit the volume controllers (215, 230).

The clarified speech signal and the vocal band reduced sound signal are mixed in the sound mixer 245 and delivered to the codec 250, decoded in the codec 250 and transmitted to the output unit 255. The output unit 255 is composed of a mono speaker or a mono earset, and outputs the received decoded signal so that a user can hear.

Hereinafter, a conversion flowchart of a sound according to a preferred embodiment of the present invention will be described with reference to FIG. 3.

When the incoming call request is received from the telephone terminal in step 300, in step 310, the controller 200 determines whether the sound player 220 is playing a sound signal. If the terminal is not reproducing the sound signal, the process proceeds to step 315 to process as a general incoming call.

If the sound player 220 is reproducing sound, the process proceeds to step 320 in which the vocal band reducer 225 reduces the vocal band of the sound and adjusts the volume by the volume controller 230. In step 330, the volume of the incoming call sound is gradually increased. If the 'call' button is not selected by determining whether the 'call' button of the terminal is selected in step 340, proceed to step 350 to stop the incoming call notification sound after a predetermined time and continue to play the sound signal; End the operation.

If the incoming call is connected by selecting the 'call' button in step 340, the incoming call sound player 235 stops the output of the incoming call sound in step 360 and through the incoming call in step 370. The received voice signal of the other party is clearly processed by the voice clarity enhancer 210 to adjust the volume by the volume controller 215. In step 380, the sound mixer 245 mixes the vocal band reduced sound signal and the clarity enhanced voice signal, and in step 390, the mixed signal is output to a mono speaker or a mono earset.

4 is a block diagram of a telephone terminal according to another embodiment of the present invention.

Here, the case where the telephone terminal can output the sound signal and the voice signal in the stereo mode, that is, the case where the stereo ear set or stereo speakers are provided in the telephone terminal. This telephone terminal will hereinafter be referred to as a stereo terminal.

4 illustrates only a part of the configuration which is considered to be important for the operation of the stereo terminal. The rest of the configuration of the stereo terminal is omitted. The solid line represents the flow of the voice signal and the sound signal, and the dotted line represents the control operation.

As shown in FIG. 4, the control unit 400, the audio unit 460, and the output unit 255 are configured as shown in FIG. 4, and the audio unit 460 is a vocoder 405 where devices related to sound conversion are collected. , Speech intelligibility enhancer 410, sound panning and volume control 415, sound player 420, vocal band reducer 425, sound panning and volume control 430, call notification player 435, sound panning And a volume controller 440, a sound mixer 445, and a codec 450.

The controller 400 shown in FIG. 4 performs the overall control operation of the stereo terminal and processes the sound conversion function as will be described later.

The sound player 420 reads sound data held by a memory (not shown) of the stereo terminal and receives an incoming call to the controller 400 through a receiver (not shown) while reproducing a sound signal. The unit 425 processes the sound signal output from the sound reproducer 420 so that only the vocal band is reduced. The sound panning and volume controller 430 adjusts the sound panning and volume control so as to bias the vocal band reduced signal from the vocal band reducer 425 to one side without being larger than the voice received through the incoming call.

If the sound signal does not include a vocal band, the sound signal may be distinguished from the voice signal by only passing through the sound panning and the volume controller 430.

Here, sound panning means adjusting the volume or adding a 3D effect so that the sound source of the vocal band reduced signal and the voice received through the incoming call are located at one side of one side and the other output unit. do.

The incoming notification sound player 435 reads out the predetermined incoming notification sound data among the incoming notification sound data held for the incoming call notification, and outputs it as the incoming notification sound for informing the user of the incoming call.

At this time, the incoming notification sound is not suddenly reproduced in a loud sound, but is gradually increased, and is output through the sound panning and volume controller 440 so as to be biased toward the other side which is different from the sound signal.

Herein, the controller 400 determines the controlled volume of the vocal band reducer 425 and the sound panning and volume controller 430, and the vocal band reducer 425 and the sound panning and volume controller 430. To control the operation.

When a call button is selected by a user and the call is connected, the call notification sound is stopped and the call is connected, and the voice signal received through the call is input to the vocoder 405 through the control unit 400. The voice signal output through the vocoder 405 is processed to make the voice more clear in the voice clarity enhancer 410, and the sound panning and volume adjuster 415 makes the sound deviate to the other side in a different direction from the sound signal. Panning and volume are adjusted.

The controller 400 determines the controlled volume of the voice intensifier 410 and the volume controller 415, and controls the operations of the voice intensifier 410 and the volume controller 415. The voice clarity enhancer 410 smoothes out irregularities in the waveform of the voice signal output from the vocoder 405 and processes the voice to be clear.

Here, if the user can fully recognize the voice of the other party only by enhancing the clarity of the voice signal, reducing the vocal band of the sound signal, and enhancing the clarity of the voice signal, the controller 400 controls the volume controllers. It is possible to control the volume control amount of (415) (430) to '0', or bypass or omit the volume controllers (415) (430).

The clarified speech signal and the vocal band reduced sound signal are mixed in the sound mixer 445 and transmitted to the codec 450, decoded in the codec 450, and transmitted to the output unit 455. The output unit 455 is composed of a stereo speaker or a stereo ear set, and outputs the received decoded signal so that a user can listen.

Hereinafter, a conversion flowchart of a sound according to a preferred embodiment of the present invention will be described with reference to FIG. 5.

When the incoming call request is received by the telephone terminal in operation 500, in operation 510, the controller 400 determines whether the sound player 420 is playing a sound signal. If the phone terminal is not reproducing the sound signal, the process proceeds to step 515 to process as a general incoming call.

If the sound player 420 is reproducing the sound, the process proceeds to step 520 where the vocal band reducer 425 reduces the vocal band of the sound and the sound panning and volume control unit 30 to one side. Sound panning and volume control are carried out, and in step 530, only the sound panning is performed so as to be shifted to the other side by gradually increasing the volume of the call notification sound by the call notification sound player 435. If it is determined in step 540 that the call button of the terminal is selected and the call button is not selected, the operation proceeds to step 550 to stop the incoming call notification sound after a predetermined time and continue playing the sound signal. To exit.

In step 540, if the 'call' button is selected and the incoming call is connected, the incoming call sound player 435 stops the output of the incoming call sound in step 560 and through the incoming call in step 570. The received voice signal of the other party is clearly processed by the voice clarity enhancer 410, and the sound panning and volume control 415 performs the sound panning and volume adjustment to the other side. In step 580, the sound mixer 445 mixes the vocal band reduced sound signal and the clarity enhanced voice signal. In step 390, the mixed signal is output to a stereo speaker or a stereo earset.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. As an example of the modification, only the example of the terminal has been described, but the present invention can be easily applied to a device including a terminal, a sound and an audio module, which can perform sound signal processing and can make a voice call without large modification. In addition, even when an incoming call occurs while listening to sound, and even when a user wants to listen to the sound during a call, a sound signal and a voice signal can be mixed and played according to an embodiment of the present invention.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the scope of the following claims, but also by those equivalent to the scope of the claims.

The present invention is characterized in that a call is implemented while listening to the sound even during a call while playing a sound in the terminal.

The present invention, if the user can satisfy the desire to continue to listen to the sound during the call further has the advantage that can be applied and implemented in the same way when receiving the broadcast or playing the game.

Claims (11)

A method for converting a sound signal in a telephone terminal capable of playing sound, Reducing the vocal band of the sound signal to be reproduced; Enhancing the clarity of the voice signal received through the call; Mixing the sound signal with the reduced vocal band and the clear voice signal; And outputting the mixed signal so that a user can listen to the sound. The method of claim 1, further comprising: panning the sound signal of which the vocal band is reduced to one side of the stereo output means; And sound panning the sound with enhanced clarity to the other side of the stereo output means. The method of claim 2, further comprising adjusting the volume of the voice signal to be greater than the volume of the sound signal. The sound switching method of claim 2, further comprising adjusting the volume of the sound signal having the reduced vocal band not to be greater than the volume of the voice signal. The sound switching method of claim 1, further comprising: panning the incoming notification sound of the terminal to the other side when the incoming call is requested while the sound signal is being reproduced. The method of claim 5, further comprising: adjusting the volume of the predetermined incoming call sound to be gradually increased; And mixing the adjusted incoming call notification sound with the sound signal having the reduced vocal band and outputting the mixed sound signal. In the audio device of the terminal for converting the sound being played, A vocal band reducer for reducing a vocal band of a sound signal to be reproduced; A speech intelligibility enhancer for enhancing the intelligibility of the voice signal received through the call; A sound mixer for mixing the sound signal from which the vocal band is removed and the sound signal with enhanced speech intelligibility; And an output unit for outputting the mixed signal. The sound panning apparatus of claim 7, further comprising: a sound panning for biasing the vocal band with a reduced sound signal to one side; And a sound panning device for clearly adjusting the voice signal of which the volume is enhanced to the other side. The audio device of claim 8, further comprising a volume controller for adjusting the volume of the voice signal to be greater than the volume of the sound signal. The audio device as claimed in claim 8, wherein the vocal band includes a volume controller for adjusting the volume of the reduced sound signal not to be greater than the volume of the voice signal. 8. The method of claim 7, wherein the incoming call is requested while the sound player is in operation. An audio device comprising a sound panning and a volume controller for biasing the incoming notification sound of the terminal to the other side.

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