KR101486583B1 - Apparatus for outputting an audio signal of a displaying device - Google Patents

Abstract

An audio output apparatus of a video display apparatus according to an embodiment of the present invention includes an audio decoder for decoding an input audio signal, An audio amplifier for amplifying an audio signal output through the audio decoder; A signal separator for outputting the audio signal output from the audio amplifier through the speaker; And a center speaker for receiving and outputting an audio signal output through the signal separation unit, wherein the signal separation unit separates the audio signal to be output through the side speaker with the center speaker, And a signal processing unit for performing signal processing on the received signal.

Audio output device

Description

[0001] The present invention relates to an audio output apparatus for an image display apparatus,

The present invention relates to an audio output apparatus in an image display apparatus, and more particularly, to an audio output apparatus capable of implementing an audio signal input through two channels in three channels or 3.1 channels.

In spite of the recent spread of large-sized high-definition image display devices, most image display devices are equipped with two-channel sound devices.

Due to the characteristics of the video display device, transmission of clear voice information in news, drama, and movies is an important quality factor. Matching the position of the image and the sound image improves the acoustic performance of the product by providing higher satisfaction.

However, the sound that is reproduced from the left and right speakers of the 2-channel sound device and formed at the center of the screen is not located at the center of the screen at a position outside the Sweet Spot in front of the screen. In addition, the sound image generated by the difference in volume between the left and right speakers may deviate from the center of the screen, and the sound image may be formed in an incorrectly blurred position, have.

Further, the larger the video display device, the wider the width of the left and right speakers becomes, making it difficult to form a clear image.

FIG. 1 is a diagram illustrating an audio output apparatus in a conventional video display apparatus, and FIG. 2 is a diagram for explaining an audio output that occurs in the conventional art.

Referring to FIG. 1, a conventional video display device includes an audio decoder 11 for decoding an audio signal provided through a tuner or an external input terminal, and a decoder 11 for receiving decoded data from the audio decoder 11 A left speaker 13 for outputting a left audio signal outputted from the amplifier 12 and a right speaker 13 for outputting a right audio signal outputted from the amplifier 12 14).

The left speaker 13 and the right speaker 14 are shown in FIG. 2. The left speaker 13 and the right speaker 14 are arranged on the display unit 20 of the video display device by audio signals output from the left speaker 13 and the right speaker 14, respectively. An imaginary image 21 is formed.

The audio image 21 formed on the display unit 20 may be blurred or inaccurate due to the position of the viewer, so that the position and direction of the video and audio do not coincide with each other.

Various techniques have been proposed for outputting audio signals through the five channels and the single woofer using the 5.1 channel decoder for such an audio image 21. However, in the case of a manufacturer of a video display device, And the burden is increased.

In order to solve the above-described problems, an embodiment of the present invention provides a video display device in which a center speaker is formed at a central portion of a front frame of a video display device to clearly and clearly position an audio image, And an audio output device of a video display device capable of effectively reproducing an audio image such as an audio signal.

It is another object of the present invention to provide an audio output device which can reduce the manufacturing cost of a video display device by realizing a rich sound field of three channels or 3.1 channels by using a low-cost two-channel amplifier.

An audio output apparatus of a video display apparatus according to an embodiment of the present invention includes an audio decoder for decoding an input audio signal, An audio amplifier for amplifying an audio signal output through the audio decoder; A signal separator for outputting the audio signal output from the audio amplifier through the speaker; And a center speaker for receiving and outputting an audio signal output through the signal separation unit, wherein the signal separation unit separates the audio signal to be output through the side speaker with the center speaker, And a signal processing unit for performing signal processing on the received signal.

In addition, the audio output apparatus of the present embodiment includes an audio decoder for receiving an audio signal and decoding it; An audio amplifier for amplifying the first audio signal and the second audio signal decoded by the audio decoder; A signal separator for outputting an audio signal through a plurality of speakers for each of a first audio signal and a second audio signal output from the audio amplifier; And at least one speaker for outputting an audio signal provided through the signal separating unit, wherein the speaker includes a first side speaker and a first center speaker for outputting the first audio signal, do.

According to the audio output apparatus of the present invention as proposed, it is possible to easily add / configure a stereo center speaker, thereby making it possible to clearly form an image at the center of the display screen, thereby satisfying the hearing of the user .

Hereinafter, the present embodiment will be described in detail with reference to the accompanying drawings. It should be understood, however, that the scope of the inventive concept of the present embodiment can be determined from the matters disclosed in the present embodiment, and the spirit of the present invention possessed by the present embodiment is not limited to the embodiments in which addition, Variations.

In the following description, the word " comprising " does not exclude the presence of other elements or steps than those listed.

3 is a block diagram illustrating a configuration of an audio output apparatus of a video display apparatus according to an embodiment of the present invention.

3, an audio output apparatus according to an embodiment of the present invention includes an audio decoder 110 for decoding an encoded audio signal, an audio amplifier (not shown) for amplifying an audio signal output from the audio decoder 110 A first and a second signal separators 131 and 132 for separating audio signals of two channels or 2.1 channels output from the audio amplifier 120 and outputting the audio signals to a side speaker and a center speaker, .

Since the audio signal input to the audio decoder 110 is an audio signal corresponding to two channels or 2.1 channels, the audio signal decoded by the audio decoder 110 is divided into a first audio signal to be output through the left speaker, And a second audio signal to be output through the speaker.

The audio amplifier 120 amplifies the first audio signal and the second audio signal and provides the amplified audio signal and the second audio signal to the signal separators 131 and 132. The signal separators 131 and 132 amplify the first audio signal And processes the audio signal to be output through a center speaker as well as a side speaker.

In detail, when the audio signal decoded by the audio decoder 110 is a signal corresponding to two channels or 2.1 channels, the signal separators 131 and 132 perform audio output corresponding to three channels or 3.1 channels .

That is, the signal separating units 131 and 132 branch the respective audio signals output from the left and right speakers and output the branched signals to the center speaker. In addition, for the audio signal to be output to the center speaker, Thereby reducing the intensity of the light.

FIG. 4 is a diagram illustrating a speaker forming structure according to a first embodiment of the present invention. Referring to FIG. 4, a signal separator and a plurality of speakers for outputting an audio signal will be described.

The signal separators 131 and 132 receive audio signals of two channels or 2.1 channels output from the audio amplifier 120 and separate audio signals to be output from the signals to be output to the side speakers to the center speaker do.

The signal separator includes a first signal separator 131 for processing an audio signal to be output to a speaker formed on the left side of the front frame 210 of the video display device, And a second signal separator 132 for processing an audio signal to be output.

The speaker located on the left side of the front frame 210 of the video display device may be referred to as a first side speaker 1311 and the speaker located on the right side of the front frame 210 may be referred to as a second side speaker 1321 Speakers positioned in the area between the first side speaker 1311 and the second side speaker 1321 may be referred to as center speakers 1312 and 1322. The center speaker 1312 and the center speaker 1322 are interpreted as being located in a region between the first side speaker 1311 and the second side speaker 1321. The center speaker 1312, .

The first signal separator 131 and the second signal separator 132 separate the audio signal to be output to the center speaker and the side speaker from the two channel audio signals output from the audio amplifier 120, So that the intensity of the separated audio signal is made different.

If the intensity of the audio signal to be output to the first side speaker 1311 and the second side speaker 1321 is to be?, The first and second signal separators 131 and 132 may be connected to the center speaker 1312, and 1322 is set to? -6dB.

In this case, the audio amplifier 120 outputs two-channel audio signals, and the first signal separator 131 receives a first audio signal to be output to the first side speaker 1311 located on the left side of the front frame And separates them.

The second signal separator 132 receives the second audio signal to be output to the second side speaker 1321 located on the right side of the front frame and separates the second audio signal.

If the intensity of the audio signal to be output to the first side speaker 1311 is?, The intensity of the audio signal to be output to the first center speaker 1312 is? -6dB And outputs an audio signal.

Similarly, if the intensity of the audio signal to be output to the second side speaker 1321 is?, The second signal separator 132 may divide the intensity of the audio signal to be output to the second center speaker 1322 by? -6dBrk And outputs the corresponding audio signal.

As a result, since the sum of the strengths of the audio signals output through the first center speaker 1312 and the second center speaker 1322 becomes? -3dB, the first center speaker 1312 and the second center speaker 1322 The intensity of the audio signal output from the front center of the image display device is? -3dB.

On the other hand, if the difference in the intensity of the signal output through the first center speaker 1312 and the second center speaker 1322 is significantly larger than -6 dB compared to the side speakers 1311 and 1321, So that the effect of the configuration of the center speaker can be reduced.

On the contrary, if the difference in the intensity of the signal is considerably smaller than -6 dB, the sound image is formed somewhat stronger, and only the sound of the center is emphasized as compared with the background sound, so that the overall balance feeling may be broken.

Therefore, according to the disclosed embodiment of the present invention, the difference between the intensity of the audio signal to be output to the side speakers and the intensity of the audio signal to be output to the center speaker through the signal separators 131 and 132 is -6. + - .

If the audio signal decoded by the audio decoder 110 is a 2.1 channel signal, the signal to be output through the woofer speaker 121 is amplified through the audio amplifier 120, It is natural that it is provided as the woofer speaker 121.

4 to 6 illustrate various embodiments of the side speaker and the center speaker according to the present invention. In FIG. 4, the left and right first side speakers 1311 and the second side speakers 1321 are connected to the front frame 210 As shown in Fig.

The first center speaker 1312 and the second center speaker 1322 are formed on the lower edge of the front frame 210 and are spaced apart from the first center speaker 1312 to the first side speaker 1311 And the distance from the second center speaker 1322 to the second side speaker 1321 are the same.

5 shows an embodiment in which the side speakers 1311 and 1321 and the center speakers 1312 and 1322 are formed on the lower edge of the front frame 210 of the video display device. In this case, 1311 to the first center speaker 1312 and the distance from the second side speaker 1321 to the second center speaker 1322 may be the same.

An embodiment in which a plurality of first and second center speakers 1312 and 1322 are respectively formed and each of the center speakers is formed on the upper and lower edges of the image display device front frame 210 is shown in FIG. .

Referring to FIG. 6, first center speakers 1312a and 1312b output audio signals branched from the audio signal to be output to the first side speaker 1311 are formed on the upper and lower edges of the front frame of the video display device, respectively. do.

The second center speakers 1322a and 1322b are also formed on the upper and lower edges of the front frame 210 adjacent to the first center speakers 1312a and 1312b.

6, the distance from the first center speaker 1312a or 1312b to the first side speaker 1311 and the distance from the second center speaker 1322a or 1322b to the second side speaker 1321 Can be the same.

According to the present embodiment as described above, it is not necessary to provide a separate 3.1 channel or more decoder, so that it is possible to reduce the cost burden in the manufacture of the video display device, and the user can use the left and right speakers and the center speaker It is possible to enjoy the sound output through the speaker.

1 is a view showing an audio output device in a conventional video display device.

Fig. 2 is a diagram for explaining the hysteresis generated in the case of the prior art. Fig.

3 is a diagram illustrating a configuration of an audio output device of a video display device according to an embodiment of the present invention.

Figures 4 to 6 illustrate various embodiments for forming a side speaker and a center speaker according to the present invention.

Claims (7)

A video display device comprising: An audio decoder for decoding an input audio signal; An audio amplifier for amplifying a decoded audio signal; A signal separator for separating the amplified audio signal into a first audio signal and a second audio signal; And And a center speaker for receiving and outputting the first audio signal and the second audio signal, The side speakers A first side speaker and a second side speaker formed on a front frame of the video display device, The center speaker And a first center speaker and a second center speaker formed in the area between the first side speaker and the second side speaker on the front frame, The signal separation unit And a second center speaker for transmitting the first audio signal to the first side speaker and the first center speaker and for transmitting the second audio signal to the second side speaker and the second center speaker Audio output device of video display device. The method according to claim 1, The signal separation unit And outputs the first audio signal and the second audio signal to the first side speaker and the second side speaker, respectively, Audio output device of video display device. The method according to claim 1, The signal separation unit And adjusting the first audio signal and the second audio signal so that the intensity of the output of the side speaker and the intensity of the output of the center speaker are different from each other Audio output device of video display device. The method according to claim 1, The side speaker and the center speaker Wherein the display unit is formed on a front frame forming a front portion of the video display device, The front frame An upper and lower frame, and left and right frames, The center speaker And an upper frame formed on an upper frame or a lower frame of the front frame Audio output device of video display device. The method according to claim 1, The signal separation unit The intensity of an audio signal to be transmitted to the side speaker and the intensity of an audio signal to be transmitted to the center speaker are set differently and output Audio output device of video display device. A video display device comprising: An audio decoder for decoding the input audio signal; An audio amplifier for amplifying a decoded audio signal; A signal separator for separating the amplified audio signal into a first audio signal and a second audio signal; And And a speaker unit for outputting the first audio signal and the second audio signal, The speaker unit A first side speaker and a first center speaker for outputting the first audio signal, A second side speaker for outputting the second audio signal, and a second center speaker Audio output device of video display device. The method according to claim 6, The signal separation unit Adjusting the first audio signal such that the output of the first center speaker is smaller than the output of the first side speaker, And adjusting the second audio signal such that the output of the second center speaker is smaller than the output of the second side speaker Audio output device of video display device.

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