KR101110495B1 - Terminal and method for providing sound effect using vibration device - Google Patents

Abstract

The present invention implements a function capable of vividly delivering ultra low bass to a user in a terminal like a subwoofer of a home theater. To this end, the present invention is equipped with a plurality of vibration elements in a predetermined area of the terminal to output a variety of three-dimensional vibration, such as the subwoofer effect according to the state of the sound. The terminal decodes the digital audio signal and restores it to its original form, and generates a driving signal for driving the vibrating element according to the frequency size of the sound source signal for each channel during reproduction of the restored audio signal. Accordingly, the vibration element disposed at a predetermined position is determined according to the driving signal separated for each channel, that is, the timing at which the vibration occurs. By doing so, vibrations having different sizes and timings are output from the vibration elements respectively disposed at predetermined positions of the terminal according to the state of the sound. You can enjoy multimedia vividly.

Vibration Element, Bass, Sound

Description

Terminal and method for providing a sound effect using a vibrating element {TERMINAL AND METHOD FOR PROVIDING SOUND EFFECT USING VIBRATION DEVICE}

1 is a view showing the appearance of a terminal to which the present invention is applied;

FIG. 2 is a block diagram of a terminal for controlling vibration elements to vibrate at different sizes and timings according to sound form according to an embodiment of the present invention; FIG.

3 is a view for explaining a method for determining the vibration magnitude in accordance with an embodiment of the present invention.

The present invention relates to a terminal for providing an effect of sound, and more particularly to a terminal for providing an effect of sound using a plurality of vibration elements to output a variety of three-dimensional vibration, such as a subwoofer effect according to the state of sound. It is about.

In the mobile communication environment, communication services, which were limited to music and text services such as ringtones and coloring, are gradually expanding to a multimedia service that combines video and sound through video calls and VOD. However, due to the limitation of wireless network capacity, VOD service currently being provided provides only low quality and mono sound quality service of less than 15 frames per second by high compression method. Because the capacity of the data that can be transmitted from the base station to the mobile communication terminal through the wireless network is limited, it is difficult to provide a multimedia service with high quality sound quality even when using a high compression method to provide a multimedia service having a large capacity. .

On the other hand, the demand for service for high sound quality and high quality is continuously increasing from users. In order to cope with these demands, development of a technology related to DMB (Digital Multimedia Broadcasting) capable of high-quality multimedia broadcasting is underway. As a result, it is possible to provide superior image quality and sound quality compared to the existing VOD service, and will gradually spread various functional contents. In particular, these contents are not only capable of providing 30 frames of high definition but also of CD quality.

As described above, the service based on the AV (Audio-Video) system has been gradually expanded and applied to the mobile communication terminal. However, the expression means is weak in the mobile communication terminal to realistically express the multimedia service. In detail, in order to make the multimedia service feel in three dimensions, the screen size cannot be continuously maintained due to the portable characteristics of the mobile communication terminal, and it is difficult to install two or more speakers in the terminal body in terms of sound quality as well as to provide more speakers. Even if equipped, there is a limit to feel the sound in three dimensions.

Therefore, there is a need for maximizing the impression that a user sees when playing a content such as a movie in a mobile communication terminal. As a result, home theaters use Dolby Digital 5.1CH, which can improve the audio function to satisfy the user's desire to feel the emotional stimulation effect by realistic sound effects in a limited space. . Compared to the conventional surround method, the Dolby Digital 5.1CH method uses sub-woofers in addition to the basic audio sound. The output from such subwoofers is inaudible to human hearing, but the emotional stimulation caused by bass vibrations gives the user a specific physical and psychological effect of watching a movie in a movie theater.

On the other hand, if the mobile communication terminal can deliver a realistic sound to the user by the subwoofer method of the home theater when providing the multimedia service, the user will be able to have more fun when watching the multimedia.

As described above, in the mobile communication terminal, it is difficult to mount a predetermined number or more of speakers, and even if the number of speakers to be mounted is large, it is difficult to expect more effects. Therefore, in the conventional mobile communication terminal, it is difficult to directly output a low frequency of 60 Hz or less directly through a speaker like a subwoofer of a home theater. In particular, in the case of outputting low frequencies to the earphones, the earphones themselves have a limit in output and increasing the low frequency vibration applied to the earphones may be unreasonable to the user.

Accordingly, the present invention provides a terminal for providing sound effects using a plurality of vibration elements to output various and three-dimensional vibrations, such as a subwoofer effect, depending on the state of sound.

According to an aspect of the present invention, there is provided a terminal for providing a sound effect, the terminal comprising: at least one vibrating element disposed at a position corresponding to a sound channel in the terminal, and outputting a signal separated from each sound by decoding the input sound; The output signal of the at least one vibrating element is determined using a channel separation unit and the signal separated by the channel, and generates a signal for driving the at least one vibrating element to output the vibration at the determined output magnitude. And a signal processor for each channel, wherein the at least one vibration device outputs vibrations having different magnitudes and timings according to driving signals from the signal processor for each channel.
In another aspect, the present invention provides a sound effect in the terminal, the process of decoding the input sound to output a signal separated by each channel, and corresponding to the sound channel in the terminal using the signal separated by the channel Determining an output timing and a size of at least one vibrating element disposed at a predetermined position, and outputting vibration through the at least one vibrating element according to the output timing and size.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

The present invention implements a function capable of delivering ultra-low sound to a user in a lively manner, such as a subwoofer of a home home theater. To this end, the present invention is equipped with a plurality of vibration elements in a predetermined area of the terminal to output a variety of three-dimensional vibration, such as the subwoofer effect according to the state of the sound. The terminal decodes the digital audio signal and restores it to its original form, and generates a driving signal for driving the vibrating element according to the frequency size of the sound source signal for each channel during reproduction of the restored audio signal. Accordingly, the vibration element disposed at a predetermined position is determined according to the driving signal separated for each channel, that is, the timing at which the vibration occurs. By doing so, vibrations having different sizes and timings are output from the vibration elements respectively disposed at predetermined positions of the terminal according to the state of the sound. You can enjoy multimedia vividly.

Components and operations of the mobile communication terminal in which such a function is implemented will be described with reference to FIGS. 1 and 2. 1 is a view showing the appearance of a terminal to which the present invention is applied.

Referring to FIG. 1, the terminal has a main body 102 and a sub body 104, and a display unit on which a multimedia screen such as a VOD is displayed is provided on the rear surface of the sub body 104. And each edge of the main body 102 is provided with vibration elements (100, 110, 120, 130). In general, users use the terminal itself while watching a movie or game channel. Accordingly, the vibration device (100, 110, 120, 130) is disposed in a position that allows the user to feel the vibration more three-dimensional. The vibration devices 100, 110, 120, and 130 output vibrations at different magnitudes and timings according to signals for each channel corresponding to their positions. The vibrating elements 100, 110, 120, and 130 may be made of a low vibration motor or a vibrating speaker element.

For example, the user may watch a movie displayed on the display while holding the terminal in his hand. At this time, as the movie is output to the screen, the sound for the movie is output to the speaker. To express the movie more realistically, the ultra-low frequency output of the sound is output to different vibration elements according to audio signals separated by channels. Is done. In this way, the user can feel like a bass through vibrations ringing at different sizes and timings.

In the following description, a case of processing a digital audio signal of 5.1 channels will be described as an example. Prior to explaining the present invention, 5.1 channel sound will be described.

5.1 channel sound includes two left and right stereo channels, two left and right surround channels, a single center channel and a low frequency enhancement channel (LFE). channel). In particular, the present invention outputs vibration to the vibration device provided in the terminal using two channels of left and right stereo channels and two channels of left and right surround channels so that ultra-low sound can be delivered in a three-dimensional sense.

In order to describe this in detail, referring to FIG. 2, which is a block diagram of a terminal for controlling vibration elements to vibrate at different sizes and timings according to sound form according to an exemplary embodiment of the present invention. 2, a terminal according to an embodiment of the present invention includes a channel separator 300, an FR signal processor 310, an FL signal processor 315, an RR signal processor 320, an RL signal processor 325, The first vibration element 330, the second vibration element 335, the third vibration element 340, and the fourth vibration element 345 are included. 2 is a block diagram illustrating an exemplary embodiment of a terminal for processing a general 5.1 channel digital audio signal.

First, when it is necessary to express a low frequency in order to maximize the effect of sound when playing multimedia such as a movie or VOD, the vibration device as shown in FIG. 1 is driven. Therefore, when the multimedia playback request is input from the user, the terminal should extract the sound source signal from the multimedia file to be played. Since the sound source signal extraction process is the same as that of multimedia sound data extraction in Dolby Pro Logic, a detailed description thereof will be omitted.

First, when the encoded sound source signal of the 5.1 channel sound is input to the channel separator 300, the channel separator 300 decodes the sound source signal to restore its original form and separates the signal for each channel. Then, the 5.1-channel signal reconstructed in the original form is transmitted to each signal processor 310, 315, 320, 325 at a corresponding timing for each channel. That is, since the timing of the signal output from the channel separator 300 is already determined, the signals for each channel are distributed to the respective signal processors 310, 315, 320, and 325 according to the timing of the channels.

Then, each signal processor 310, 315, 320, 325 determines the magnitude of the vibration using the signal transmitted from the channel separator 300. The size of the vibration is to enable the ultra-low frequency, which is divided into 35 Hz to 60 Hz, to be ringed by the delicately divided vibration. Accordingly, each signal processor 310, 315, 320, 325 generates a driving signal for driving the vibration element to output the vibration to each of the vibration elements (330, 335, 340, 345) so that the vibration can be ringed in the determined size. .

In detail, in the case of the FR signal processor 310, the channel signal corresponding to the FRONT-RIGHT separated by the channel separator 300 is transmitted, and the channel signal corresponding to the FRONT-LEFT is transmitted to the FL signal processor 315. The channel signal corresponding to REAR-RIGHT is transmitted to the RR signal processor 320, and the channel signal corresponding to REAR-LEFT is transmitted to the RL signal processor 325, respectively. In this case, for convenience of explanation, it will be assumed that the channel signal transmitted to the FR signal processor 310 appears as shown in FIG. 3. 3 is a view for explaining a method for determining the vibration magnitude in accordance with an embodiment of the present invention.

First, the magnitude of vibration is divided step by step so that the ultra-low frequency divided into 35Hz ~ 60Hz can be ringed by the delicately divided vibration. Accordingly, the FR signal processor 310 determines the magnitude of the vibration using frequencies having different magnitudes. In particular, the FR signal processor 310 changes the magnitude of the frequency into the form of current so that the vibration can be made louder or smaller by the frequency. That is, as shown in FIG. 3, when the frequency amplitude corresponds to Amp1, a driving signal corresponding to the first stage vibration magnitude is generated. When the frequency magnitude corresponds to Amp2, the driving signal corresponding to the magnitude of the first stage vibration magnitude is larger than that of the first stage vibration magnitude. Generate the corresponding drive signal.

Then, the FR signal processor 310 outputs the generated driving signal to the first vibration device 330. Accordingly, the first vibrating element 330 operates by a driving signal transmitted from the FR signal processing unit 310, and in particular, outputs vibration in the same size as the driving signal indicating the magnitude of the vibration.

In particular, each vibrating element of the first vibrating element 330, the second vibrating element 335, the third vibrating element 340, the fourth vibrating element 345, etc. according to an embodiment of the present invention is simply high / low. It is not a vibration device that is turned on or off depending on the signal, but a subwoofer that can deliver vibrations that are delicately classified according to the very low frequencies of 35Hz to 60Hz. Accordingly, each of the vibration elements are disposed in a predetermined region of the terminal to efficiently represent the sound effect of the ultra low sound when outputting the sound.

As described above, when a signal separated for each channel is transmitted to each signal processor 310 at different timings, each signal processor 310 indicates a magnitude of vibration by using the signal transmitted to each signal according to each timing. Generate a drive signal. Then, each signal processor 310 is also transmitted to the driving signal to each of the vibration elements 330, 335, 340, 345 connected to each other at different timings. By doing so, each of the vibration elements 330, 335, 340, and 345 alternately rotates according to the timing to ring vibrations having a magnitude equal to that of the transmitted driving signal.

By doing so, the user can watch a movie or a game channel while holding the hand in hand, and when the magnificent sound is output, the user can feel as if he is listening to live sound through the emotional stimulation caused by vibration. In other words, the user can feel as if a home theater is moved to a handheld theater through a terminal that produces sound effects with delicately divided vibrations. As an example of this, in order to effectively output the sound of a plane flying in a scene in which a plane flies from left to right when watching a movie, it must be expressed as if a surround sound comes out. Therefore, when the plane appears on the left side, the terminal sounds the vibrating element on the left in proportion to the output of the ultra low sound, and as the plane moves to the right, the terminal vibrates on the right side instead of gradually reducing the output of the vibrating element on the left side. Gradually increase the output of the device. Through this, the user can see the scene of the plane flying on the screen, and the speaker not only can hear the sound of the plane flying, but also can feel the three-dimensional sound effect through the vibration of the vibration element disposed at a predetermined position.

As described above, according to the present invention, by outputting vibrations at different sizes and timings to vibration elements disposed in a predetermined area of the terminal, there is an advantage that a sound effect of a very low sound can be produced in a three-dimensional manner during multimedia playback. In addition, the present invention has the advantage that it can bring a competitive edge to the terminal that can act as a handheld theater by implementing the ultra-low vibration device that can add a more thrilling feeling to the high sound quality as the multimedia of high quality, high sound quality is provided .

Claims (7)

In the terminal for providing a sound effect, At least one vibrating element disposed at a position corresponding to a sound channel in the terminal; A channel separator for decoding the input sound and outputting a signal obtained by separating the sound for each channel; The channel-specific signal processing units may be configured to determine an output size of the at least one vibrating device by using the signal separated for each channel, and to generate a signal for driving the at least one vibrating device to output vibration at the determined output size. Including, The at least one vibration element, the terminal for providing a sound effect, characterized in that for outputting vibration in different sizes and timings in accordance with the drive signal from the signal processor for each channel. The method of claim 1, wherein the at least one vibrating element, A terminal for providing a sound effect, characterized in that the ultra-low frequency transmission between 35Hz to 60Hz with granular vibration. The method of claim 1, wherein the at least one vibrating element, Terminal for providing a sound effect, characterized in that any one of a low-vibration motor, a vibrating speaker element to transmit very low frequencies. The method of claim 1, wherein the sound channel, And at least one of a left and right stereo channel, a left and right surround channel, a single center channel and a low frequency enhancement channel. In the method for providing a sound effect in the terminal, Decoding the input sound and outputting a separated signal for each channel; Determining an output timing and a size of at least one vibrating element disposed at a position corresponding to a sound channel in the terminal by using the signals separated for each channel; And outputting vibration through the at least one vibrating element according to the output timing and magnitude. The method of claim 5, wherein the at least one vibrating element, A method for providing a sound effect, characterized in that it transmits very low frequencies with granular vibration. The method of claim 5, wherein the sound channel, And at least one of a left and right stereo channel, a left and right surround channel, a single center channel and a low frequency enhancement channel.

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