KR100688198B1 - terminal for playing 3D-sound And Method for the same - Google Patents

Abstract

The present invention provides a sound source output unit including a memory for storing sound source data, two or more speakers for reproducing sound source data stored in the memory, and a sound source data stored in the memory at a time difference to enable 3D stereo sound. The present invention relates to a terminal having a sound reproducing means including a sound source reproducing unit for reproducing through two or more speakers, wherein the two or more speakers provided in the terminal provide a simple sound to a terminal user in the case of game or video playback. Not only the output of the 3D sound but having a sense of spatial depth that matches the screen, and has the effect of improving the purchasing power of consumers.

Stereo Sound, Mobile Communication, Terminal, Flat Panel Speaker

Description

 Terminal for playing 3D-sound And Method for the same}             

1 is a view showing the configuration of a conventional general mobile communication terminal,

2 is a block diagram showing the configuration of a mobile communication terminal which is an embodiment of a terminal having sound reproducing means according to the present invention;

3 is a cross-sectional view of a flat panel speaker used in the present invention;

4 is a diagram illustrating an embodiment in which a center / left / right speaker is mounted on a mobile communication terminal having sound reproducing means according to the present invention;

5 is a diagram illustrating a state in which a speaker and a listener are arranged in a general audio system.

<Explanation of symbols on main parts of the drawings>

10: sound source output unit 11: left sub speaker

12: Right auxiliary speaker 13: Center speaker

20: sound source playback section 30: memory

100: vibrator 101: piezoelectric film

102a and 102b transparent electrodes 103a and 104b signal lines

The present invention relates to a terminal having sound reproducing means, and more particularly, to a terminal having sound reproducing means for reproducing sound source data using a two or more speakers provided in the terminal to have a three-dimensional stereoscopic sound effect.

As an example of a terminal provided with sound reproducing means, FIG. 1 illustrates a structure of a conventional mobile communication terminal. The conventional folder-type mobile communication terminal is largely composed of a folder 1 and a main body 2, and the folder 1 ) And a hinge portion (3) for coupling the main body (2).

The folder 1 includes a speaker unit 4 for listening to the other party's voice and a liquid crystal display unit 5 for outputting various letters, numbers, codes, and images, and the main body 2 includes: Two or more key buttons 6 for inputting a telephone number or various characters, a transmitter microphone 7 for collecting a voice message of a user, and an antenna 8 for transmitting and receiving radio waves.

Mobile communication terminals such as cellular phones and personal communication services (PCS) phones send a beep sound or alert sound to the outside through the speaker, so that the user can receive a call while using the terminal. You will know. According to the development of communication and sound processing technology and user's request, various researches are being conducted to reproduce more rich sound or music in a small communication terminal.

Recently, attempts have been made to provide a three-dimensional stereoscopic sound effect by mounting two or more speakers in a terminal. The stereoscopic sound refers to an acoustic signal to which spatial information is added so that a listener can perceive a sense of direction and distance when hearing a sound. Recently, in the field of mobile communication, three-dimensional stereophonic effects have been applied, and thus, a more demanding sound signal reproduction technology has been required, and effective control of three-dimensional acoustic effects has been required. In recent years, home theaters have gained popularity, and sound reproduction means including mobile communication terminals are provided in line with the trend that three-dimensional sound reproduction functions using multi-speakers represent various products' performances in various audio devices. In the consumer's choice of the terminal has a significant impact on improving the purchasing power.

However, a conventional terminal cannot reproduce stereoscopic sound at a level that satisfies the needs of such users even if it is provided with two or more speakers unless the sound source data itself contains information for stereoscopic sound reproduction. That is, in the case of general sound source data that is not specially coded, the same sound is output to the two or more speakers at the same timing, so that a stereoscopic feeling cannot be felt. If information for reproducing stereoscopic sound is contained in each sound source data, its capacity becomes so large that there is a problem in storing / processing data in a small terminal such as a mobile communication terminal. Therefore, when a user plays a game or a movie, the conventional mobile communication terminal hears the sound through a speaker built in the terminal. When using a single speaker, only a simple sound is output without a match between the image and the sound appearing on the screen. Even if the speaker is provided with the same sound at the same timing, there is a disadvantage that you do not feel the sense of space and depth of the sound.

Another problem is that at least two speakers are required in the mobile communication terminal to reproduce sound in three dimensions. Therefore, it should be designed to mount two or more speakers. Since a small terminal such as a conventional mobile communication terminal uses a loudspeaker, when the plurality of speakers are built, more space is needed. However, since the size of the mobile communication terminal is getting smaller, it is not possible to increase the mounting space of the speaker indefinitely.

In other words, since a large number of speakers must be built in order to reproduce three-dimensional sound due to such a space limitation, there is a problem that the volume of the terminal itself must be increased, and there is a structural limitation to reproduce three-dimensional sound in the conventional mobile communication terminal. There is this.

The present invention has been made to solve the above-mentioned problems of the prior art, by driving two or more speakers mounted on a terminal equipped with a sound reproducing means with a time difference to allow a terminal user to feel a three-dimensional sound, It is an object of the present invention to provide a terminal having a stereo sound reproduction function to a terminal user by overcoming the spatial limitations caused by mounting two or more speakers using a flat panel speaker.

A terminal having a sound reproducing means according to the present invention for solving the above problems, the memory, the left side speaker, the right side speaker, and the center located between the left side speaker and the right side auxiliary speaker A sound source output unit including a speaker, and a sound source playback unit for reproducing the sound source data stored in the memory through the left sub-speaker, the right sub-speaker, and the center speaker at a time difference to enable the implementation of three-dimensional stereo sound do.

In addition, the stereophonic sound reproduction method according to the present invention, in the terminal having a left subsidiary speaker, a right subsidiary speaker, and a center speaker positioned between the left subsidiary speaker and the right subsidiary speaker, storing the sound source data, and 3 And reproducing the sound source data through the left subsidiary speaker, the right subsidiary speaker, and the center speaker at a time difference to enable the stereoscopic sound.

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

The present invention relates to a terminal having a sound reproducing means, a personal mobile communication terminal (PCS), a personal digital terminal (PDA), a smart phone, a next generation mobile communication terminal (IMT-2000), a wireless LAN terminal equipped with a sound reproducing means It includes a wired / wireless terminal equipped with a sound reproducing means as well as a mobile communication terminal such as, and is applicable to any terminal equipped with a sound reproducing means irrespective of its name. Hereinafter, an embodiment of the present invention will be described taking a mobile communication terminal as an example.

2 is a block diagram of a mobile communication terminal which is an embodiment of a terminal having sound reproducing means according to the present invention.

The mobile communication terminal having a sound reproducing means according to the present invention comprises a sound source output unit comprising a memory 30 for storing sound source data to be reproduced and at least two speakers for outputting sound source data stored in the memory 30 ( 10) and a sound source playback unit 20 for reproducing the sound source data stored in the memory 30 through the two or more speakers with a time difference to have a three-dimensional stereoscopic sound effect.

The memory 30 stores sound source data to be reproduced by the mobile communication terminal. The sound source data includes sound data for mobile games, MP3 music files, and other formats having monophonic information or multiplex information.

The memory 30 includes a memory built in the mobile communication terminal or an external memory detachable from the mobile communication terminal.

The sound source output unit 10 includes two or more two or more speakers whose operation is controlled by the speaker control signal of the sound source playback unit 20 stored in the sound source data stored in the memory 30. According to an embodiment of the present invention, the sound source output unit 10 may include a central speaker 13, a left auxiliary speaker 11, and a right auxiliary speaker 12 according to a position at which a speaker is mounted in a mobile communication terminal. Can be.

The left auxiliary speaker 11 is located on the left side of the mobile communication terminal, and may be generally implemented as a loudspeaker used for the mobile communication terminal. The left auxiliary speaker 11 serves as a left surround speaker of a general audio system.

The right auxiliary speaker 12 is located on the right side of the mobile communication terminal, and may be generally implemented as a loudspeaker used for the mobile communication terminal. The right auxiliary speaker 12 serves as a right surround speaker of a general audio system.

The central speaker 13 is a speaker located in the center of the mobile communication terminal may be composed of a speaker (4 in Fig. 1) that is output the voice from the existing mobile communication terminal, in addition to the speaker that performs the voice call function It may be composed of a speaker provided for stereoscopic sound reproduction.

The present invention may be provided with the center speaker 13 in addition to the speaker for the voice call in a preferred embodiment for stereophonic sound reproduction, in this case the center speaker 13 is a flat speaker to reduce the mounting space Can be configured.

The flat panel speaker is a thin plate-type speaker, in particular, in the case of a transparent flat speaker, a liquid crystal display, an organic EL display, and a PDP can be mounted on a display unit where the user can visually check information, thereby saving space in which the speaker is mounted. can do. FIG. 3 is a cross-sectional view of a flat panel speaker. Referring to the structure of a general flat panel speaker, a flat panel speaker uses a piezoelectric film 101 as a vibrator 100. The piezoelectric film converts electrical signals into sound waves. The electrode 102a and 102b are formed on both sides of the piezoelectric film, and the signal lines 103a and 103b are formed on the electrodes and connected to a control module to generate vibrations according to electrical signals. It is configured to transmit the vibration to the diaphragm to generate sound waves. Polyvinylidene fluoride (PVDF) is generally used for the piezoelectric film, and the electrode may be a metal electrode and a transparent electrode.

One embodiment in which the flat speaker is mounted on the display unit of the mobile communication terminal is mounted on the front of the display unit. In this case, the flat speaker is configured such that the contents of the liquid crystal display are transmitted through the transparent flat speaker. Such a transparent flat speaker has a very small vibration width in micron units, and the screen does not shake even when mounted on a liquid crystal display of a mobile communication terminal. Wears much better features than cone-type speakers. The transparent flat panel speaker uses a light transmissive piezoelectric film and a transparent electrode.

4 is an auxiliary speaker 11, 12 is mounted on the left / right side of the mobile communication terminal having a sound reproducing means according to the present invention and the transparent to the central speaker 13 in front of the central liquid crystal display of the mobile communication terminal; FIG. 1 illustrates an embodiment in which the flat panel speaker 13 is mounted.

The sound source reproducing unit 20 drives the left subsidiary speaker 11 and the right subsidiary speaker 12 first when reproducing the sound source data stored in the memory 30 to reproduce the sound source data, and after a predetermined time passes, the center The speaker 13 is driven to operate three-dimensional sound by time difference. Through this, the spatial depth of the output sound can be implemented to make the user of the mobile communication terminal feel three-dimensional stereoscopic sound.

The sound source reproducing unit 20 may be embodied as an MPU (Micro Processing Unit) of a mobile communication terminal, and first drives the left subsidiary speaker 11 in accordance with the purpose of the sound effect to be implemented using the sound source data. After the time difference, the two or more speakers may be controlled to sequentially drive the center speaker 13 and the right auxiliary speaker 12 to give an effect of passing sound from left to right. In addition, the control in the opposite direction may have the effect of passing the sound from right to left.

The time difference applied when the two or more speakers are driven may be appropriately determined in consideration of the time when the sound output between each speaker reaches the ears of the user of the mobile communication terminal according to the size of the mobile communication terminal and the distance between the two or more speakers. have.

Another embodiment may include a sensor in the mobile communication terminal so that the time difference applied when the two or more speakers are driven may be appropriately determined according to the distance between the mobile communication terminal and the user. That is, as the distance between the terminal and the user increases, the sound may be output from the same sound source, and thus, may be configured to reproduce with a larger time difference.

The sound source reproducing unit 20 may be controlled by driving the two or more speakers with a time difference in various other forms.

Looking at the three-dimensional sound reproduction method of the present invention configured as described above are as follows.

FIG. 5 is a diagram illustrating an arrangement of a speaker for feeling a stereoscopic sound in a general audio system or a television system. In order to feel perfect surround stereo sound, a speaker must be present at the rear of the listener, but in this embodiment, a system for realizing stereo sound with three speakers will be considered.

In this case, it is ideal that the left speaker is about 30 to 45 degrees away from the center speaker. Assuming that the same sound is reproduced in each speaker, the listener located at the center senses the spatial sense of the sound according to the position and distance of each speaker to feel 3D sound. That is, when comparing the distance (a) from the left speaker to the listener's ear (b) and the distance (b) from the listener's ear to the center speaker, the distance (b) at the center speaker is greater than the distance (a) at the left speaker. long. In other words, the longer it takes the sound to reach the listener's ear from the center speaker, the smaller the difference in time can be to recognize the three-dimensional sound.

The stereoscopic sound reproduction method of the present invention is to reproduce the sound source data by driving the two or more speakers with a time difference so that the sound source data to be output has a three-dimensional stereoscopic sound effect.

In one embodiment, if a terminal having sound reproducing means includes a left subsidiary speaker, a right subsidiary speaker, and a center speaker, the distance is actual audio even though the left and right speakers are separately mounted, unlike the general audio system described above. It is very short compared to the system, and the listening angle is also less than 30-45 degrees.

In order to solve this problem, the present invention uses a sound source reproducing unit to generate a time delay between the left and right speakers to reproduce the sound and the center speaker to reproduce the sound to reproduce the three-dimensional sound. In other words, the speaker installed on the left and right of the terminal is driven first to reproduce the sound source data, and after a predetermined time, the speaker installed in the center of the terminal is operated to feel the spatial depth of sound.

The predetermined time may be appropriately determined according to the size of the terminal and the distance between the two or more speakers. In addition, the left auxiliary speaker and the right auxiliary speaker to control the sound of the frequency corresponding to the set range, respectively, or to control the speaker by moving the time or adjust the volume of the sound with a time difference as if moving from left to right three-dimensional feeling It can be controlled to have.

As described above, a terminal having a sound reproducing means according to the present invention has been described with reference to the illustrated drawings, but the present invention is not limited by the embodiments and drawings disclosed herein, and the application is within the scope of the technical idea. Can be.

The terminal having the sound reproducing means according to the present invention configured as described above has two or more speakers provided in the terminal, so that the terminal user does not simply output the sound in the case of playing a game or a video, but has a spatial depth that matches the screen. In addition to providing a three-dimensional three-dimensional sound with a sense, there is an effect that can improve the purchasing power of consumers.

Claims (8)

A memory in which sound source data is stored; A sound source output unit including a left sub-speaker, a right sub-speaker, and a center speaker positioned between the left sub-speaker and the right sub-speaker; And A sound source reproducing unit for reproducing the sound source data stored in the memory through the left sub-speaker, the right sub-speaker, and the center speaker so as to realize a 3D stereo sound; Terminal with means. The method of claim 1, And a display unit for displaying an operation state under the control of the controller. The method of claim 2, The center speaker is a terminal having a sound reproducing means, characterized in that the flat speaker. The method of claim 3, wherein The center speaker is mounted on the front of the display unit, the terminal having sound reproducing means, characterized in that the transparent flat speaker to reproduce the sound using a transparent electrode and a vibrator. The method of claim 2, The sound source reproducing unit regenerates the sound source data by first driving the left subsidiary speaker and the right subsidiary speaker when the sound source data is reproduced, and reproducing the sound source data by driving the center speaker after a predetermined time elapses. A terminal comprising sound reproducing means. The method of claim 1,  And the time difference is determined based on a distance between the center speaker, the left subsidiary speaker and the right subsidiary speaker. In the stereophonic sound reproduction method of a terminal having a left subsidiary speaker, a right subsidiary speaker, and a center speaker located between the left subsidiary speaker and the right subsidiary speaker, Storing sound source data; And And reproducing the sound source data through the left subsidiary speaker, the right subsidiary speaker, and the center speaker at a time difference to enable a three-dimensional stereophonic sound. The method of claim 7, wherein In the reproducing step, the left subsidiary speaker and the right subsidiary speaker are driven first to reproduce the sound source data, and after a predetermined time, the center speaker is driven to reproduce the sound source data. .

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