KR20110054612A - Audio output device and method in image display device - Google Patents

Abstract

PURPOSE: An audio outputting apparatus in an image display device and a method thereof are provided to output an audio sound of various range. CONSTITUTION: An audio outputting apparatus comprises a woofer speaker(135) interface which is attachable and detachable to the image display device, a memory unit(150) for storing a setting value of the woofer speaker, an audio signal processing unit(123) for regulating an audio output by the attachment state of the woofer speaker, and a controller(140) for controlling the audio output by the attachment state of the woofer speaker.

Description

Apparatus and method for audio outputting in image display device}

The present invention relates to an image display device, and more particularly, to an audio output device and method in an image display device.

With the rapid development of multimedia technology, it is possible to watch high-definition video from a large display device using a variety of multimedia resources such as HDTV and DVD even in a home, and to listen to audio with a loud and rich audio source from a speaker. It is possible to do

The home theater system is a system for providing such high-definition video and great audio. Home theater systems typically use 5.1-channel sound. Unlike the stereo or 4-channel sound output, the 5.1-channel sound method collects and records the sound for each channel, so the sound field is clear during playback, and the bass part is composed of a separate channel to be played through the subwoofer. great.

The 5.1-channel sound system consists of a body supporting DTS (Digital Theater System) and Dolby System, a left-front speaker, a center speaker, a light-front speaker, a left-rear speaker, a light-rear speaker, and a subwoofer speaker. The 5.1 channel speaker is the basic component.

To listen to 5.1-channel audio with a loud and rich audio source, each speaker should be evenly arranged in the proper position around the listener.

However, there is a form in which the woofer speaker can be attached and detached according to the trend of ultra-thin and ultra-lightweight, such as a video display device equipped with a speaker. However, in this case, the woofer speaker may be reduced and lightened. You will not be able to output the corresponding range.

That is, Figure 1 is a graph illustrating the output sound band according to the attachment / detachment of a conventional woofer speaker. As shown in FIG. 1 (a), the audio output state in the state where the woofer speaker is mounted may output both the low band 10 output from the woofer speaker and the mid-range 20 output from the front / rear speaker. Can be.

However, in the state in which the woofer speaker is removed, as shown in the example graph of (b), only the audio of the mid-high range 20 is output while the low-range audio is lost.

The present invention has been made to solve the above problems, and an object of the present invention is to provide an audio output device and method in a video display device that can output audio of various sound ranges from the speaker of the video display device.

It is another object of the present invention to provide an audio output device and method in an image display device that can be output by varying the output of the woofer.

According to an aspect of the present invention, there is provided a video display device comprising: a woofer speaker interface unit detachable from the video display device; A memory unit for storing setting values of the woofer speaker; An audio signal processor adjusting an audio output depending on whether the woofer speaker is attached or detached; And a controller for detecting whether the woofer speaker is attached or detached and controlling audio output according to the detachment of the woofer speaker.

In addition, the present invention comprises the steps of detecting whether the woofer speaker is connected; Outputting an audio band of the woofer speaker according to the sensed voltage value.

As described above, the present invention can provide a variety of audio according to the detachment and the state of the woofer speaker, has the effect of listening to a wide range of audio.

Hereinafter, with reference to the drawings will be described the present invention in more detail.

2 is a block diagram of a video display device to which an embodiment of the present invention is applied.

The image display device includes a receiver 110, a processor 120, an output unit! 30, a controller 140, and a memory unit 150.

The receiver 110 may include an external signal input unit 12 and a tuner unit 114, and the processor 120 may include an image / audio signal switch 121, an A / D converter 122, an amplifier decoder, and the like. The image / audio signal processing unit 123 and the image memory unit 124 may be included. The output unit 130 may include an image signal output unit 131, a display unit 132, an audio signal output unit 133, and a speaker ( 134 and the woofers picker 136. The speaker 134 may be a speaker for high-pitched sound reproduction and a speaker for mid-range sound reproduction, or may be a front or rear speaker.

The external signal input unit 111 receives an external signal received from an external device such as a digital versatile disk (DVD), a set-top box, a camcorder, etc., and provides the external signal input unit 121 to the image / audio signal switching unit 121. At least one channel is xsld according to the control signal of the tuner unit 114, and the image / audio / data signal received through the tuned channel is decoded and separated and provided to the image / audio signal switching unit 121.

The video / audio signal switching unit 121 selects at least one of the channels provided from the external signal input unit (! 12) and the tuner unit 114 and separates the video / audio signal of the channel as necessary. The MPEG decoder and the image / audio signal processor 123 are provided. The image / audio signal switching unit 121 may include a demultiplexer capable of separating the image / audio data signal. When the signal selected by the video / audio signal switching unit 121 is an analog signal, after the video signal and the audio signal of the analog signal are separated, the analog video signal is converted into a digital video signal by the A / D converter 122 and then the MPEG decoder. And an image / audio signal processor 123. The analog audio signal may be provided as an audio signal output unit, and in case of a myth digital signal selected by the video / audio signal switching unit 121, both the video signal and the audio signal of the digital signal are MPEG decoder and the video / audio signal. The processor 123 may be provided.

Particularly, the image / audio signal switching unit 121 according to an embodiment of the present invention separates the audio signal to be output from the front / rear speaker 134 and the audio to be output from the woofer speaker 135 with respect to the input audio signal. do. Therefore, when the woofer speaker 135 is connected, it can be output as an audio band according to the state and type of the woofer speaker 135 connected. In addition, the audio signal processor 123 extends and outputs audio from the front / rear speaker 134 to the audio band output from the woofer speaker 135 when the woofer speaker 135 is removed.

The video signal output unit 131 processes the video signal output from the MPEG decoder and the video / audio signal processor 123 through the display unit 132 and the audio signal output unit 133 is the MPEG decoder. And an audio signal output from the image / audio signal processor 123 to be output through the speaker 134.

In particular, the speaker 134 according to the embodiment of the present invention may include the front / speaker 134 and the woofer speaker 135 as described above. The right speaker 135 detects a connection through the interface unit (not shown), and outputs audio at a corresponding audio level according to whether or not a connection is made. In addition, when the woofers speaker 135 is removed, the audio output band is extended from the front / rear speaker 134 to a predetermined area to output audio including a band similar to the audio band output from the woofers speaker 135. .

The controller 140 performs overall control of the internal configuration of the image display device, and particularly, detects whether or not the woofer speaker 135 is connected according to an embodiment of the present invention. In addition, the controller 140 controls to adjust the audio output band according to whether the woofer speaker 135 is connected. In an embodiment of the present invention, for example, the controller 140 detects whether the woofer speaker 135 is connected. However, the controller 140 may include a separate detection unit for detecting the connection of the speaker 135.

The memory unit 150 includes various applications or data required for driving the image display device. In particular, the embodiment of the present invention performs a function of storing the information on the audio band output according to the type of the woofers speaker 135 to be connected. In addition, when the connection of the woofer speaker 135 is not detected, information about an output band of audio that may be output from the front / rear speaker 134 is stored.

An audio output operation according to an exemplary embodiment of the present invention will be described in detail with reference to FIGS. 3 to 6 through the above configuration.

The video display device performs an audio output mode (step 305). In the embodiment of the present invention, an audio output mode has been described as an example, but may be an audio output standby mode.

The controller 140 determines whether the woofer speaker 135 is connected while the audio output mode is being performed (310). If the woofer speaker 135 is detected, the controller 140 checks the voltage value of the connected speaker. As shown in (a) of FIG. 5, a woofer speaker connected to a woofer speaker interface unit (not shown) may distinguish an audio output level of a woofer according to a voltage value. That is, the voltage value of the A-type woofer speaker may be 1.65V, and the B-type woofer speaker voltage value may be 1.05V and the C-type woofer speaker voltage value may be 0.1V. The voltage value according to the woofer speaker may be flexible.

Accordingly, the speaker type or type and the audio output band according to the voltage value are set according to the voltage check result of the connected woofers speaker (step 325) and the sound quality according to the connected woofers speaker 135 is applied (step 330). The audio including the audio is output (step 335). That is, according to the type of the woofer speaker 135 connected to the audio band 500 output from the front / rear speaker 134 as illustrated in FIG. The low band is determined (505, 510, 515) to output the low band to the corresponding audio band.

On the other hand, if the connection of the woofer speaker is not detected (step 310), if the connection of the woofer speaker is not detected, the control unit 140 operates in a mode in which the woofer speaker is not connected (step 315). Will be described with reference to FIGS. 4 to 5.

If the connection of the woofer speaker 135 is not detected, the control unit 140 operates in the woofer speaker removing mode (step 405). When the woofer speaker 135 is removed from the video display device, the front / The output band of the rear speaker 134 is checked, and the audio band to be extended to the low band preset in the memory unit 150 is confirmed, and the audio is extended to the low band to the corresponding region (step 415).

That is, when the woofer speaker 135 is removed from the audio band 500 output from the front / rear speaker 134 while the woofer speaker 135 is mounted as shown in FIG. The low range band 600 is extended to the audio range output from the speaker 135. Therefore, it is possible to output the audio similar to that connected to the woofer speaker 135 (step 420).

1 is an exemplary view showing an audio output according to a conventional woofers speaker.

2 is a block diagram of a video display device to which the present invention is applied.

3 is a flowchart illustrating an audio output operation of a woofer speaker according to an exemplary embodiment of the present invention.

4 is a flowchart illustrating an audio output operation according to an exemplary embodiment of the present invention.

5 is an exemplary view showing audio output according to a woofer speaker according to an embodiment of the present invention.

6 is an exemplary view illustrating an audio output operation according to an exemplary embodiment of the present invention.

Claims (9)

In the video display device, A woofer speaker interface unit detachable from the image display device; A memory unit for storing setting values of the woofer speaker; An audio signal processor adjusting an audio output depending on whether the woofer speaker is attached or detached; And a control unit which detects whether the woofer speaker is attached or detached and controls audio output according to the detachment of the woofer speaker. The audio output apparatus of claim 1, wherein the memory unit stores audio output band information according to a voltage value of a woofer speaker sensed by the controller. The audio output device of claim 1, wherein the memory unit stores a range for extending an audio output band when the control unit does not detect the connection of the right speaker. The audio output apparatus of claim 3, wherein the audio output band extension range stored in the memory unit is an audio output band output from the woofer speaker. The audio output apparatus of claim 1, wherein the controller is configured to extend the audio output band to a preset range if the connection of the woofer speaker is not detected. The apparatus of claim 5, wherein the extended audio output range is an audio band output by the preset reference woofer speaker. Detecting whether a woofer speaker is connected; Outputting an audio band of the woofer speaker according to the sensed voltage value. The audio system of claim 7, wherein the connection of the woofer speaker is not detected. The audio output method of the video display device, characterized in that for outputting by extending the output audio range to the audio band output from the woofer speaker. The method of claim 7, further comprising: detecting a voltage value of the connected woofer speaker when the connection of the woofer speaker is detected; Identifying an audio output band of the woofer speaker according to the sensed voltage value.

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