KR100745287B1 - Apparatus and method for audio output control of Digital TV - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital TV, and in particular, when watching a main screen and a sub-screen of a digital TV at the same time, an audio output control apparatus of a digital TV that enables wireless listening to voice signals of a sub-screen using near field communication. It is about a method.

In the digital TV audio output control method according to the present invention, in order to simultaneously output the video signal and the audio signal of the main screen and the sub-screen in the digital TV receiving one or more broadcast signals to output the audio signal using short-range wireless communication In the audio output control method of the digital TV, when the video signal corresponding to the main screen is displayed on the main screen display, the audio signal is output to the speaker of the TV and the video signal corresponding to the sub-screen is output to the sub-screen display. Transmitting a screen voice signal to a wireless headset via short-range wireless communication; When the voice switching command of the main screen and the sub-screen is input, transmitting a voice signal of the main screen to the wireless headset through short-range wireless communication and simultaneously outputting a voice signal of the sub-screen to the speaker of the digital TV; And receiving and outputting the transmitted voice signal by turning on a short-range wireless communication function of the wireless headset.

Digital TV, wireless communication

Description

Apparatus and method for audio output control of Digital TV}

1 is a configuration diagram schematically showing a voice output control apparatus for a digital TV according to the prior art.

2 is a digital TV configuration diagram showing an audio output control device of a digital TV according to an embodiment of the present invention.

3 is a flowchart illustrating a method of controlling a voice output of a digital TV according to a first embodiment of the present invention.

4 is a flowchart illustrating a method of controlling a voice output of a digital TV according to a second embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

20 ... Switch section 21-1 ... Main tuner

21-2 ... Sub Tuner 22-1 ... Main Demodulator

22-1 ... Sub 23 ... Decoder

24 ... Main screen display 25 ... Partial screen display

26. Speaker 27.

28 ... Wireless Voice Output Device

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital TV, and in particular, when watching a main screen and a sub-screen of a digital TV at the same time, an audio output control apparatus of a digital TV that enables wireless listening to voice signals of a sub-screen using near field communication. It is about a method.

In general, digital TV can display only one image on the entire screen. However, as digital technology advances, PIP (Picture In Picture), POP (Picture Out of Picture) and Split Screen functions can be used. With the development of digital TVs, multi-screen processing is possible that can display one or more images over the entire screen.

The PIP receives a broadcast signal and simultaneously displays a main display area and a sub display area on a full screen, wherein the sub screen displays an image of the main screen or another image set by a user. The POP functions to receive broadcast signals and to display 3 to 12 sub-screens next to the main screen, thereby improving the selectivity for broadcasting.

The split screen serves to display two simultaneous video screens.

In addition, since there is only one voice processing unit in a general digital TV, two simultaneous screens, such as ATSC (Advanced Television System Committee), NTSC (National Television System Committee), and wired input, can be viewed using the PIP function. I could only output audio on the screen.

The ATSC is a committee established to delve into the advanced television system, the next-generation terrestrial television system in the United States, and the ATSC system adopts an eight-value residual sideband (VSB) modulation system as a modulation method.

In addition, the NTSC refers to the International TV System Committee or the method that established the US color TV standard.

1 is a configuration diagram schematically showing a voice output control apparatus for a digital TV according to the prior art. The digital TV apparatus is shown with some parts omitted, and schematically shows only the apparatus necessary to explain the present invention.

Referring to FIG. 1, a general digital TV apparatus includes a video / audio software device (not shown), an MPEG decoder (not shown), and a signal processor (not shown) from an ATSC / NTSC tuner 10 and an NTSC tuner 11. Through the digital TV, video and audio can be viewed, and the user of the digital TV can use the PIP function to watch one or more simultaneous screens.

However, since the conventional digital TV has only one sound processor 12, only the audio signal of the main screen is passed through the sound processor 13 through the sound amplifier 13 to amplify the voice signal. It is output to the speaker 14.

Therefore, even if two screens can be viewed simultaneously, the viewer can hear only the voice of the main screen, but cannot hear the voice of the sub-screen.

In addition, in order to listen to the voice of the sub-screen, it is troublesome to listen to the voice of the previous sub-screen as the current main screen by using the control unit 15 which changes the sub-screen to the main screen through main / sub switching. .

The present invention has been made to solve the above problems, and when a digital TV user simultaneously watches the main screen and the sub-screen, the voice signal of the sub-screen can be wirelessly listened to using the short-range wireless communication without switching between the main / sub screen. The present invention provides an apparatus and a method for controlling a voice output of a digital TV.

The digital TV voice output control apparatus according to the present invention for achieving the above object,

A dual decoder for separating the digital broadcast signal and simultaneously processing the video and audio signals output to the main screen and the sub-screen, the speaker for outputting the audio signal of the main screen, and the audio signal of the sub-screen are received by short-range wireless communication. In the digital TV voice output control device for simultaneously outputting the voice signal of the main screen and sub-screen through a wireless voice output device for outputting

When the video signal of the main screen is displayed on the main screen display, the audio signal of the main screen is output to the speaker, and the video signal of the subscreen is displayed on the subscreen display, and the corresponding subscreen audio signal is transmitted through short-range wireless communication. A voice processor for transmitting a voice signal of the main screen to short-range wireless communication according to the voice switching between the main screen and the sub-screen;

And a wireless voice output device for receiving and outputting a voice signal transmitted from the voice processor through short-range wireless communication.

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In addition, the voice output control method of the digital TV according to an embodiment of the present invention,

A digital TV audio output control method for outputting an audio signal using short-range wireless communication to simultaneously output video signals and audio signals of a main screen and a sub-screen in a digital TV receiving one or more broadcast signals.

When the video signal corresponding to the main screen is displayed on the main screen display and the audio signal is output to the speaker of the TV, and the video signal corresponding to the sub screen is output to the subscreen display, Transmitting to a headset;
When the voice switching command of the main screen and the sub-screen is input, transmitting the voice signal of the main screen to the wireless headset through short-range wireless communication and simultaneously outputting the voice signal of the sub-screen to the speaker of the digital TV; And

And receiving and outputting the transmitted voice signal by turning on a short-range wireless communication function of the wireless headset.

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Referring to the accompanying drawings, a voice output control apparatus for a digital TV according to an exemplary embodiment of the present invention configured as described above is as follows.

2 is a diagram illustrating a digital TV showing an apparatus for controlling a voice output of a digital TV according to an exemplary embodiment of the present invention.

Referring to FIG. 2, the apparatus for controlling voice output of a digital TV may include a switch unit 20 for selecting a broadcast signal input through an antenna, a wired input, and the like, and for selecting a broadcast signal selected by the switch unit 20, respectively. A main demodulator for demodulating the main tuner 21-1 and the sub tuner 21-2 and the broadcast signal received from the tuner 21 in a VSB (Vestigial Side Band) or QAM (Quadrature Amplitude Modulation) scheme. 22-1) and the sub demodulator 22-2, and a decoder 23 for decoding the video signal and the audio signal of the signal demodulated by the demodulator 22 and outputting the video and audio signals of the main / sub picture. ), A main screen display 24 for outputting a video signal of the main screen, and a sub screen display 25 for outputting a video signal of the subscreen with respect to a video signal output from the decoder 23; For the audio signal output from the decoder 23, And a speaker 26 for outputting the voice signal of the main screen, a voice processor 27 for processing the voice signal of the sub-screen, and a wireless voice output device 28 for outputting the voice signal of the sub-screen.

Referring to the accompanying drawings, a voice output control apparatus for a digital TV according to an exemplary embodiment of the present invention configured as described above is as follows.

First, the switch unit 20 selects a broadcast signal input through an antenna and a wired input and outputs the same to the main tuner 21-1 and the sub tuner 21-2. The tuner 21 tunes the RF signal of the selected broadcast channel to downmix to an intermediate frequency (IF) to the main demodulator 22-1 and the sub demodulator 22-2. Output

The demodulator 22 is a device for demodulating the down-mixed IF signal in a VSB or QAM scheme. If the IF signal is a digital broadcast signal, the demodulator 22 detects a carrier from the broadcast signal and decodes a coded signal made by an RF transmitter. The signal is output to the decoder 23 in the form of a TP stream.

Here, the decoder 23 decodes the video and audio signals of the main and sub screens so as to output a high definition (HD) signal in the sub picture output mode such as PIP and POP to the main picture and the sub picture. Can be a dual decoder.

On the other hand, the decoder 23 parses the TP stream to separate the audio and video stream, the separated video stream is variable length decoding (VLD) and then inverse quantization (IQ) process, inverse discrete cosine transform (IDCT) After the process and the motion compensation (MC) process to restore the pixel value of the original screen. Similarly, the audio stream decodes the reverse of audio coding.

Accordingly, the video signal of the main screen output from the decoder 23 is output to the main screen display 24, and the video signal of the sub screen output from the decoder 23 is output to the sub screen display 25. do.

In addition, the audio signal of the main screen output from the decoder unit 23 is output to the speaker 26 mounted on the digital TV, and the voice signal of the sub screen output from the decoder unit 23 is capable of short-range wireless communication. It is outputted to the wireless voice output control device 28 which can receive a voice signal wirelessly via the voice processing unit 27 which processes the voice.

For example, Bluetooth, ZigBee and Ultra Wide Band (UWB) wireless communication technologies may be used as the short range wireless communication means.

In order to output the voice signal of the sub-screen, the voice processor 27 may turn on the short-range wireless communication unit mounted on the TV, search for a wireless voice output device supporting the short-range wireless communication, and transmit and receive data. Set the channel.

At this time, the voice processing unit 27 outputs the voice signal as an RF signal, and the RF signal is wirelessly modulated and output to a wireless voice output control device 28 capable of receiving the voice signal such as a headset.

  3 is a flowchart illustrating a method of controlling a voice output of a digital TV according to a first embodiment of the present invention.

Referring to FIG. 3, when the user turns on the digital TV (S10), an image of the main screen is displayed on the screen, and at the same time, an audio is output (S11).

At this time, if the user turns on the sub-screen output mode such as PIP, POP, split screen function of the digital TV (S12), the video of the sub-screen is displayed simultaneously with the image of the main screen of the digital TV, and can receive audio signals wirelessly. The voice of the sub-screen is output through the wireless voice output device such as a headset (S13).

4 is a flowchart illustrating a method of controlling a voice output of a digital TV according to a second embodiment of the present invention.

Referring to FIG. 4, when the user turns on the sub-screen output mode of the digital TV (S20), the user may select whether to use the short range wireless communication by using an option function for selecting whether to use the short range wireless communication function (S21). .

The option function may enable or disable the menu window, and the menu window may be implemented as an OSD (On Screen Display).

In this case, when the short range wireless communication is selected to be used, the short range wireless communication function is turned on, and the voice of the sub-screen is selected to be output to the wireless voice output device such as a headset using the short range wireless communication function (S22).

As examples of the short range wireless communication means, Bluetooth, ZigBee and Ultra Wide Band (UWB) wireless communication technologies may be used.

At this time, if the user selects the sub screen voice to be output to the wireless voice output device such as a headset, the voice of the sub screen is output to the wireless voice output device (S23), and the voice of the main screen is output to the speaker of the digital TV (S24).

Here, the main / sub screen voice can be switched, and the main screen voice can be output to a wireless voice output device such as a headset capable of receiving a wireless voice signal, and the sub screen voice can be output to the speaker of the digital TV. Can be.

In addition, when the short-range wireless communication option function is turned off, the user selects a screen to listen to the voice through the speaker (S25). When the user selects the main screen, the voice of the main screen is output to the speaker of the digital TV (S24). If is selected, the audio of the sub screen is output to the speaker of the digital TV (S26).

Also, if the voice size of the main screen is reduced, the voice size of the main / sub screen is increased so that the user can accurately understand the contents of the screen by increasing the voice size of the wireless voice output device which outputs the voice of the sub-screen. It can be interlocked.

As another example of the above method, when the size of the subscreen is variable, increasing the size of the subscreen may reduce the voice size of the main screen and increase the voice size of the subscreen in conjunction with this.

Also, in the above method, the user can mute the audio signal of the screen which he / she does not want to listen to.

As described above, when the user of the digital TV simultaneously watches the sub screen such as the PIP function with the main screen, the sub screen can be listened to using the short range wireless communication technology built in the digital TV.

So far, the present invention has been described with reference to the preferred embodiments, and those skilled in the art to which the present invention pertains to the detailed description of the present invention and other forms of embodiments within the essential technical scope of the present invention. Could be implemented. Here, the essential technical scope of the present invention is shown in the claims, and all differences within the equivalent range will be construed as being included in the present invention.

According to the present invention, there is provided a voice output control apparatus and method for digital TV, when the digital TV user uses the PIP, POP, and split screen functions to simultaneously view the sub screen simultaneously with the main screen, the short-range wireless communication technology There is an effect that can be listened to wireless by using.

In addition, there is an effect that can solve the distance constraint problem that occurs when listening to the sub-screen voice using a wired headset.

Claims (11)

Receives a digital broadcasting signal by separating the video signal and the audio signal output to the main screen and the sub-screen at the same time, a speaker for outputting the audio signal of the main screen, and the audio signal of the sub-screen by near field communication In the digital TV voice output control device for simultaneously outputting the voice signal of the main screen and sub-screen through a wireless voice output device for outputting When the video signal of the main screen is displayed on the main screen display, the audio signal of the main screen is output to the speaker, and the video signal of the subscreen is displayed on the subscreen display, and the corresponding subscreen audio signal is transmitted through short-range wireless communication. A voice processor for transmitting a voice signal of the main screen to short-range wireless communication according to the voice switching between the main screen and the sub-screen; And a wireless voice output device configured to receive and output a voice signal transmitted from the voice processor through short-range wireless communication. The method of claim 1, The decoder unit is a dual decoder that can decode the video and audio signals of the main screen and the sub-screen, the digital TV audio output control device characterized in that to process and output the high-definition (HD) broadcast to the main screen and the sub-screen at the same time . delete The method of claim 1, The wireless voice output device digital voice output control device characterized in that it comprises a wireless headset. A digital TV audio output control method for outputting an audio signal using short-range wireless communication to simultaneously output video signals and audio signals of a main screen and a sub-screen in a digital TV receiving one or more broadcast signals. When the video signal corresponding to the main screen is displayed on the main screen display and the audio signal is output to the speaker of the TV, and the video signal corresponding to the sub screen is output to the subscreen display, Transmitting to a headset; When the voice switching command of the main screen and the sub-screen is input, transmitting a voice signal of the main screen to the wireless headset through short-range wireless communication and simultaneously outputting a voice signal of the sub-screen to the speaker of the digital TV; And Receiving and outputting the transmitted voice signal through short-range wireless communication of the wireless headset. The method of claim 5, The outputting of the audio signal of the main screen or the sub-screen using the short range wireless communication, Selecting whether to use short-range wireless communication using an option function that allows a user to select whether to use the short-range wireless communication function; If the near field communication is selected to be used, turning on the near field communication function; And outputting a voice of a main screen or a sub-screen to a wireless headset using the short range wireless communication function. delete The method of claim 5, If the voice signal output to the near field communication is not selected, Turning off the near field communication function; If the main screen is selected as the screen to listen to the voice, the main screen's voice is output to the speaker of the digital TV, and if the sub screen is selected as the screen to listen to the voice, the main screen is output to the speaker of the digital TV. And a screen switching step of the sub-screen. The method of claim 5, And outputting a video signal of the sub-screen to a sub-screen display, activating a menu window for checking whether the short-range wireless communication function is used. The method of claim 5, The audio output control method of the digital TV, characterized in that to mute any one of the audio signal of the main screen and the sub-screen. The method of claim 5, When the volume of the speaker for outputting the voice of the main screen is decreased, the volume of the wireless headset for outputting the voice of the sub-screen is increased in conjunction with this, so that the user can accurately understand the contents of the screen. Voice output control method of the digital TV, characterized in that the voice size is interlocked.

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