KR20040058660A - Mobile phone for outputting stereo sound - Google Patents

Abstract

PURPOSE: A portable terminal for outputting a stereo signal is provided to mount plural stereo speakers and woofers, so as to output channel stereo sounds, thereby easily realizing a stereo sound effect with high fidelity. CONSTITUTION: A voice signal processor(120) decodes received voice data, and outputs the decoded voice data. An audio data processor converts prestored digital audio data into analog data, amplifies the analog data, and outputs the amplified analog data. A controller(180) selects one of the audio data processor and the voice signal processor(120) based on a user command, and operates the selected unit. The audio data processor comprises as follows. An audio memory(140) stores a 2.1-channel stereo signal as a digital signal. A data converter(150) converts the 2.1-channel stereo signal into analog data, separates the analog data into a 2-channel stereo signal and a woofer signal, and outputs the stereo signal and the woofer signal. An audio amplifier(160) amplifies the stereo signal and the woofer signal transmitted from the data converter.

Description

Mobile terminal for outputting stereo signals {MOBILE PHONE FOR OUTPUTTING STEREO SOUND}

The present invention relates to a portable terminal, and more particularly, to a portable terminal for outputting an n.1 channel stereo signal including an n-channel stereo signal and a woofer signal.

Recently, with the development of mobile communication technology, portable terminals for using mobile communication services are popularly used. Therefore, the range of application of the portable terminal is diversified. In other words, the portable terminal is often used for other purposes besides the unique function of the portable terminal.

Representative functions of the portable terminal may include an alarm function, a wake-up call function, a schedule function, a game function, and a karaoke function.

Among them, the karaoke function downloads and stores predetermined audio data in the portable terminal, and then, when requested by the user, uses one speaker (for example, a sign language speaker) provided in the portable terminal. Audio data) output function.

However, when audio data is output using one speaker as described above, audio data stored in the form of a stereo signal including a general stereo signal or a woofer signal may be used. There was a disadvantage that the sound effect is reduced.

SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem, and an object of the present invention is to provide a mobile terminal for outputting stereo to maximize the sound effect of the sound (sound) output from the mobile terminal.

Another object of the present invention is to provide a portable terminal for outputting an n.1 channel stereo by attaching n stereo speakers and a woofer speaker for outputting a stereo signal to the portable terminal.

1A illustrates a portable terminal according to a first embodiment of the present invention;

1B is a view illustrating a mobile terminal according to a second embodiment of the present invention;

2 is a schematic functional block diagram of a portable terminal according to the first and second embodiments of the present invention;

3 is a flowchart illustrating an operation process of a mobile terminal according to the first and second embodiments of the present disclosure;

4 is a state diagram of use of the portable terminal according to the first and second embodiments of the present invention;

In order to achieve the above object, a mobile terminal provided by the present invention includes a sign language speaker, a stereo speaker, a woofer speaker for low sound, a voice signal processor for decoding voice data received from an external device and outputting the decoded voice signal to the sign language speaker; An audio data processor converting the digital audio data into analog data and then amplifying and outputting the audio signal using the sign language speaker, a stereo speaker, and a woofer speaker; and the voice signal processor or the audio data processor based on a user's command input from the outside. It characterized in that it comprises a control unit for selecting any one of the operation.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the same elements in the figures are represented by the same numerals wherever possible. In addition, detailed descriptions of well-known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

1A and 1B are diagrams illustrating portable terminals according to first and second embodiments of the present invention. In particular, FIGS. 1A and 1B illustrate a portable terminal equipped with three speakers for outputting a 2.1 channel stereo signal including a 2-channel stereo signal and a woofer signal in a clamshell portable terminal.

Referring to FIG. 1A, a portable terminal according to the first embodiment of the present invention mounts a first stereo speaker 190 for outputting a stereo signal of one channel of a stereo signal of two channels in an upper portion of a folder of the portable terminal. The second stereo speaker 210 for outputting the stereo signal of the other channel of the two-channel stereo signal is mounted in a position adjacent to the microphone 240, and the woofer speaker 200a inside the folder of the mobile terminal, that is, It is mounted on the lower portion of the display unit 220.

Referring to FIG. 1B, the portable terminal according to the second embodiment of the present invention mounts the first and second stereo speakers 190 and 210 at the same position as that of FIG. 1A and the woofer speaker 200b. It is mounted on the upper portion of the main body, that is, the upper portion of the key input unit 230.

1A and 1B, when the portable terminal operates in the voice call mode, the first stereo speaker 190 operates as a sign language speaker.

1A and 1B are exemplary representations of positions where a plurality of speakers are mounted in a mobile terminal of the present invention. Therefore, the position at which the speakers are mounted is not limited by FIGS. 1A and 1B.

2 is a schematic functional block diagram of a portable terminal according to the first and second embodiments of the present invention. Referring to FIG. 2, the mobile terminal 100 according to an embodiment of the present invention includes a voice signal receiver 110, a voice signal processor 120, a voice codec 130, an audio memory 140, and a D / A converter. 150, an audio amplifier 160, an input unit 170, a controller 180, and three speakers (the first speaker 190, the second speaker 200, and the third speaker 210).

The voice signal receiver 110, the voice signal processor 120, and the voice codec 130 are devices for allowing a mobile terminal to make a voice call, which is a function unique to a mobile terminal. The voice signal receiver 110 receives and outputs a voice signal received from a receiver (not shown) of the portable terminal. Then, the voice signal is decoded through the voice signal processor 120 and the voice codec 130 and then output through the first speaker 190. As described above, it is obvious to those skilled in the art as a function unique to the portable terminal that the portable terminal receives the audio signal and then decodes the audio signal for the voice call. Therefore, a description of a more specific process is omitted.

Meanwhile, the audio memory 140, the D / A converter 150, and the audio amplifier 160 are devices for allowing a mobile terminal to perform a sound reproduction function.

The audio memory 140 stores 2.1 channel stereo signals, and the 2.1 channel stereo signals are generally downloaded from the outside and stored. The D / A converter 150 converts the 2.1 channel stereo signal input from the audio memory 140 into analog data and separates the analog data into two channels of stereo signal and woofer signal. The audio amplifier 160 amplifies and outputs the two-channel stereo signal and the woofer signal transmitted from the data converter 150.

In this case, the three speakers (the first speaker 190, the second speaker 200, and the third speaker 210) are stereo speakers for outputting two channels of stereo signals, respectively, and a woofer signal for audio data output. It acts as a woofer speaker for output. In FIG. 2, an example in which the first speaker 190 and the third speaker 210 operate as stereo speakers for outputting two channels of stereo signals, respectively, and the second speaker 200 operate as a woofer speaker are illustrated. In particular, the example of FIG. 1 illustrates an example in which the first speaker 190 operates as a sign language speaker for receiving a voice signal during a voice call of the mobile terminal 100.

The audio amplifier 160 outputs the amplified two-channel stereo signals to the first speaker 190 and the third speaker 210, and outputs the woofer signal to the second speaker 200.

The controller 180 may operate the voice signal receiver 110, the voice signal processor 120, and the voice codec such that the mobile terminal operates in a voice call mode or a sound playback mode based on a user command input through the input unit 170. 130, a control signal is output to the audio memory 140, the D / A converter 150, and the audio amplifier 160.

Meanwhile, the first and third speakers 190 and 210 that operate as stereo speakers are preferably mounted to have a maximum separation distance within the structure of the portable terminal (see FIGS. 1A and 1B).

In addition, since the woofer speaker generally operates between a plurality of stereo speakers, in the example of FIG. 2, the second speaker 200 that operates as the woofer speaker may have a predetermined position between the first speaker 190 and the third speaker 210. Is preferably mounted (see FIGS. 1A and 1B).

3 is a flowchart illustrating an operation process of a portable terminal according to an embodiment of the present invention. 1 and 3, the controller 180 of the portable terminal includes a voice signal receiver 110, a voice signal processor 120, a voice codec 130, an audio memory 140, according to an operation mode selected by a user. The operations of the D / A converter 150 and the audio amplifier 160 are controlled as follows.

When the user selects the voice call mode, the controller 180 stops the operation of the audio amplifier 160 to prevent sound reproduction (S210) and stops the operations of the audio memory 140 and the D / A converter 150. (S220). After the operation of the voice signal receiver 110 is started (S230), the operations of the voice signal processor 120 and the voice codec 130 are started (S240 and S250). The audio signal received through the voice signal receiver 110 and then decoded through the voice signal processor 120 and the voice codec 130 is output (S260).

On the other hand, when the user selects the sound play mode, the controller 180 stops the operation of the voice codec 130 to prevent the output of the voice signal (S310), the voice signal receiver 110 and the voice signal processor 120 Stop the operation (S320). After reading data (eg, digital sound) from the audio memory 140 (S330), the operation of the D / A converter 150 is started to convert the data (S340). The converted data is recorded in an internal storage unit (S350). In this case, recording the converted data is to temporarily store the data and output the same through the audio amplifier 160. When the digital audio data is converted into analog data as described above, the controller 180 starts the operation of the audio amplifier 160 (S360) and the analog data (for example, 2.1 channel stereo signal) through the audio amplifier 160. The output to the first speaker 190, the second speaker 200, the third speaker 210. At this time, the two-channel stereo signal is output to the first and third speakers 190 and 210, and the woofer signal of the low tone is output to the second speaker 200.

4 is a state diagram of use of the mobile terminal 100 according to an embodiment of the present invention. FIG. 4 is a diagram illustrating an example in which the present invention is applied to a foldable portable terminal. In the example of FIG. 4, reference numerals 190 and 210 denote stereo speakers, and 200 denote a woofer speaker. Therefore, after the user converts the operation mode of the mobile terminal 100 to the sound reproduction mode, as shown in FIG. 4, the user can open and open the clamshell portable terminal 100 and listen to 2.1 channel stereo sound.

In the description with reference to the drawings, an example of a portable terminal including three speakers for outputting a 2.1 channel stereo signal has been described. However, a stereo signal of n.1 channel is mounted in a portable terminal equipped with three or more speakers. It is also possible to implement to output the. For example, it is also possible to implement five speakers in a portable terminal and output a 4.1 channel stereo signal.

In the above description of the present invention, specific embodiments have been described, but various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be defined by the described embodiments, but should be determined by the equivalent of claims and claims.

As described above, the portable terminal of the present invention can output n.1 channel stereo by mounting n stereo speakers and woofer speakers for the bass. Therefore, there is an advantage that it is very easy to secure a stereo sound effect of high fidelity (Hi-Fi: Hi-Fidelity) at a minimum cost.

Claims (10)

In a mobile terminal, Hydration speaker, With stereo speakers, Woofer speaker, A voice signal processor to decode voice data received from an external device and output the decoded voice signal to the sign language speaker; An audio data processing unit for converting the pre-stored digital audio data into analog data and amplifying and outputting the digital audio data using the sign language speaker, a stereo speaker, and a woofer speaker; And a controller for selecting and operating any one of the voice signal processor and the audio data processor based on a user's command input from the outside. The method of claim 1, wherein the audio data processing unit Audio memory for storing 2.1-channel stereo signals as digital signals; A data converter converting the 2.1 channel stereo signal input from the audio memory into analog data and separating the analog data into two channel stereo signals and a woofer signal; And an audio amplifier for amplifying and outputting two-channel stereo signals and woofer signals transmitted from the data converter. The portable terminal of claim 2, wherein the audio amplifier outputs the amplified two-channel stereo signals to the sign language speaker and the stereo speaker, respectively, and outputs the woofer signal to the woofer speaker. The portable terminal of claim 1, wherein the stereo speaker is mounted to have a maximum separation distance from the sign language speaker in a structure of the portable terminal. The method of claim 4, wherein the woofer speaker And a predetermined position between a position where the sign language speaker is mounted and a position where the stereo speaker is mounted. In a mobile terminal, With one sign language speaker, At least one stereo speaker, One woofer speaker, A voice signal processor to decode voice data received from an external device and output the decoded voice signal to the sign language speaker; An audio data processing unit converting the pre-stored digital audio data into analog data and amplifying and outputting the same by using the sign language speaker, stereo speakers, and a woofer speaker; And a controller for selecting and operating any one of the voice signal processor and the audio data processor based on a user's command input from the outside. The method of claim 6, wherein the audio data processing unit audio memory for storing n.1 channel stereo signals as digital signals; A data converter converting the n.1 channel stereo signal input from the audio memory into analog data and separating the analog data into n channel stereo signals and woofer signals; And an audio amplifier for amplifying and outputting an n-channel stereo signal and a woofer signal transmitted from the data converter. The portable terminal of claim 7, wherein the audio amplifier outputs the amplified n-channel stereo signals to the sign language speaker and the stereo speakers, respectively, and outputs the woofer signal to the woofer speaker. The mobile terminal of claim 6, wherein the stereo speakers are mounted to have a maximum distance from each of the sign language speaker and the stereo speakers in the structure of the mobile terminal. The method of claim 11, wherein the woofer speaker And a predetermined position between the sign language speaker and the stereo speakers.