KR100771617B1 - Remocon auto muted apparatus for display device and method thereof - Google Patents

Abstract

The present invention relates to a video device, and more particularly, to a remote control automatic silent device and a method of a video device for wirelessly receiving an audio signal. The present invention, a remote control for outputting a wireless signal received wirelessly to the speaker; And a video device main body that temporarily cuts off a sound signal transmitted to the remote controller when switching channels. The main body of the video device, the tuner for receiving the video and audio signals of the specific channel; A sound data transmitter which receives a sound signal from the tuner and modulates it into an FM signal and wirelessly transmits the sound signal to the remote controller; And controlling a wireless transmission state of the sound data transmitter, and controlling to temporarily block the output of the sound signal transmitted to the remote controller when the channel switching is detected by comparing the noise of the image signal output from the tuner with a reference value. do. Therefore, when the user changes the channel, the image noise of the screen is detected to detect the channel change, and the output of the sound signal transmitted to the remote control is temporarily cut off and muted to be output to the speaker of the remote control. Prevent noise. Therefore, the user does not need to hear loud noise when switching channels, and prevents unnecessary vibration to extend the life of the speaker.

TV, Picture, Sound, Wireless, FM-TX, Remote Control, Reception, Noise, Mute, Silent

Description

Remocon auto muted apparatus for display device and method

1 is a block diagram showing a remote control device for FM-TX reception of a conventional video device.

2 is a flow chart for explaining the operating state of FIG.

Figure 3 is a block diagram showing a remote control automatic silent device of a video device according to the present invention.

Figure 4 is a flow chart illustrating a remote control automatic silent method of a video device according to the present invention illustrating the operating state of FIG.

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

30: video device main body 31: tuner

32: sound data transmitter 33: image processor

34: video signal noise detector 35: screen display

36: control unit 40: remote control

41: sound data receiver 42: controller

43: sound output unit 44: clock oscillation unit

SPK: Speaker

The present invention relates to a video device, and more particularly, to a remote control automatic silent device and a method of a video device for wirelessly receiving an audio signal.

In general, a video device is a device for outputting information as an image using a screen, and a typical video device includes a television (TV) for receiving an electric wave of a broadcasting station and displaying an image.

Recently, video apparatuses have been developed to include various functions in order to satisfy a user's convenience with high definition. An example of such various functions is the FM-TX function.

The FM-TX is a function of wirelessly transmitting an audio signal (audio stereo signal) of an image or an audio device to an FM stereo and receiving the same by an FM radio or a remote controller.

1 is a block diagram illustrating a remote control device for FM-TX reception of a conventional video device, and FIG. 2 is a flowchart for explaining an operating state of FIG. 1.

As shown, the conventional FM-TX receiving remote control device, the video device main body 10 for wirelessly transmitting an audio signal (audio stereo signal) as an FM signal, and the sound wirelessly transmitted from the video device main body 10 It is composed of a remote control unit 20 for receiving and outputting a signal.

To this end, the main body 10 of the video apparatus 10 receives an audio stereo sound signal from the TV tuner 11 and the TV tuner 11 that receives a digital or analog TV broadcast signal, modulates the audio stereo signal into an FM signal, and wirelessly transmits the audio data. And (12).

In addition, the image processing unit 13 for processing the signal input from the TV tuner 11 to implement the image, and the screen display unit 14 for displaying the image implemented in the image processing unit 13 on the screen is provided.

The remote controller 20 includes: an audio data receiver 21 for wirelessly receiving and detecting audio stereo sound data of the video apparatus main body 10; A controller 22 for outputting a predetermined control signal; A sound output unit 23 for receiving the output signal of the sound data receiving unit 21, and converts the sound into a sound that can be output by the control signal, and a clock oscillator 24 for oscillating and supplying a clock of a predetermined frequency to each unit. Include.

In the conventional FM-TX receiving remote control device configured as described above, as shown in FIG. 2, a TV video signal is first received by a television, and the image processor 13 processes a signal input from the TV tuner 11. An image is implemented and displayed on the screen display unit 14.

In such a state, when the FM-TX function is turned on, the FM-TX frequency is selected between the video apparatus main body 10 and the remote controller 20 (S100 to S110).

Thereafter, the main body 10 of the video device transmits an FM-TX signal including a predetermined sound signal. That is, the TV tuner 11 receives a digital or analog TV broadcast signal, and the sound data transmitter 12 receives an audio stereo sound signal from the TV tuner 11 and modulates it into an FM signal for wireless transmission (S120). .

Accordingly, the remote controller 20 receives the FM-TX signal (S130).

Thereafter, the sound data receiver 21 wirelessly receives and detects audio stereo sound data of the main body 10 of the video apparatus 10, and the controller 22 outputs a predetermined control signal, and the sound output unit 23 The output signal of the sound data receiving unit 21 is received and converted into a sound that can be output by the control signal, and is output to a speaker (SPK; headphone, receiver, earphone, etc.) (S140).

However, in the video apparatus according to the related art as described above, the acoustic noise generated when switching channels is directly output to the speaker of the remote controller for FM-TX reception and is heard by the user's ear, thereby making the ear hurt by loud noise. In particular, there is a problem that gives more inconvenience to the user by the channel switching operation with a high frequency of use.

In addition, there is a problem in that the life of the speaker is shortened due to unnecessary vibration of the speaker due to noise.

Accordingly, the present invention is to solve the above-mentioned conventional problems, the automatic remote control device of the remote control of the video device to block the transmission signal output from the main body of the video device to the remote control when switching channels to prevent the sound noise of the speaker and The purpose is to provide a method.

According to an aspect of the present invention, there is provided a remote control automatic silent device for a video device, the remote control outputting a wireless signal received by a speaker; Receiving a video signal of a specific channel to display a corresponding video on the screen, and wirelessly transmits the audio signal of the video to the remote control, and includes a main body of the video device to temporarily block the audio signal transmitted to the remote control when switching channels It is characterized by.

The main body of the video device, the tuner for receiving the video and audio signals of the specific channel; A sound data transmitter which receives a sound signal from the tuner and modulates it into an FM signal and wirelessly transmits the sound signal to the remote controller; And controlling a wireless transmission state of the sound data transmitter, and temporarily stopping output of a sound signal transmitted to the remote controller when a channel change is detected from the tuner.

Preferably, the controller detects a channel change by comparing the noise of the image signal output from the tuner with a reference value.

Preferably, the video signal noise detector detects the noise of the video signal output from the tuner and outputs the noise to the controller. The video signal noise detector includes a clamping circuit.

The remote controller may further include: an audio data receiver configured to receive and demodulate an audio signal transmitted from the video apparatus main body; And a sound output unit configured to output the demodulated sound signal to the speaker.
In addition, the remote control automatic silent method of the video device according to the present invention, receiving a video signal of a specific channel and displays the video on the screen, and the video device main body for wirelessly transmitting the sound signal of the video to the remote control, and the wireless A remote control automatic silent method of a video apparatus including a remote controller for outputting a received sound signal to a speaker, the method comprising: outputting a sound signal received by the remote control; Inputting a channel switching signal by a user to the video apparatus main body; When the channel change is detected in the main body of the video device, characterized in that it comprises the step of temporarily blocking the output of the sound signal transmitted to the remote control.

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In the channel switching detection of the main body of the video device, it is preferable to detect the channel switching by comparing the noise of the video signal generated during the channel switching with a reference value.

Hereinafter, an embodiment according to the present invention will be described in detail with reference to the accompanying drawings. Here, the video apparatus of the present invention will be described with reference to a normal television as an example.

3 is a block diagram showing an automatic remote control device of a video apparatus according to the present invention.

As shown, the present invention includes a remote control unit 40 for outputting a wireless signal (audio stereo signal) received wirelessly to the speaker; Receives an image signal of a specific channel and displays the corresponding image on the screen, and wirelessly transmits an audio signal of the image to the remote controller 40, and temporarily cuts off an audio signal transmitted to the remote controller 40 when switching channels. The apparatus main body 30 is comprised.

To this end, the video device main body 30 includes a tuner 31, an audio data transmitter 32, an image processor 33, an image signal noise detector 34, a screen display 35, and a controller 36. .

The tuner 31 receives video and audio signals of a specific channel from a conventional digital or analog TV broadcast signal.

The sound data transmitter 32 receives the sound signal from the tuner 31, modulates the sound signal into an FM signal, and wirelessly transmits the sound signal to the remote controller 40.

The controller 36 controls the wireless transmission state of the sound data transmitter 32, and when a channel change is detected from the tuner 31, temporarily blocks the output of the sound signal transmitted to the remote controller 40. . The controller 36 detects channel switching by comparing the noise of the image signal output from the tuner 31 with a reference value.

The image processor 33 implements an image by processing a signal input from the TV tuner 31.

The screen display unit 35 displays an image implemented by the image processor 33 on the screen.

The video signal noise detector 34 detects noise of the video signal output from the tuner 31 and outputs the noise to the controller 36. At this time, the video signal noise detector 34 is preferably composed of a conventional clamping circuit.

The remote controller 40 also includes a sound data receiver 41, a controller 42, a sound output unit 43, a clock oscillator 44, and a speaker SPK.

The sound data receiver 41 receives and demodulates the sound signal transmitted from the video apparatus main body 30.

The sound output unit 43 outputs the sound signal demodulated by the sound data receiving unit 41 to the speaker SPK.

The control unit 42 outputs a predetermined control signal for controlling the sound output unit 43, and the clock oscillator 44 oscillates a clock of a predetermined frequency and supplies it to each unit.

4 is a flowchart illustrating a method for automatically controlling a remote controller of a video device according to the present invention for explaining the operating state of FIG.

As shown, the present invention in the state of receiving a video and sound signal of a specific channel to the video device main body 30, modulates the sound signal into an FM signal and wirelessly transmits to the remote controller 40, Inputting a channel change signal by the user in step S200; When the channel switching is detected by detecting the noise of the video signal generated when switching the channel in the video device main body 30 and comparing it with a reference value (S210 ˜ S220), the output of the audio signal transmitted to the remote controller 40 is output. Temporarily blocking (S230); Receiving a sound signal according to the control of the step and outputs to the speaker (SPK) of the remote control (40) (S250 ~ S270).

Transmitting and receiving antennas (ANT) for transmitting and receiving radio signals are connected to the sound data transmitter 32 and the sound data receiver 41, respectively, and are electrically connected thereto.

As described above, the FM-TX is a function that can wirelessly transmit an audio signal (audio stereo signal) of a video or audio device to FM stereo and receive it by an FM radio or a remote controller.

In addition, the FM signal wirelessly transmitted from the video device 30 and the remote controller 40 preferably uses a wireless transmission frequency of 2.4 GHz or 900 MHz band for short-range wireless communication.

Referring to the operation of the present invention configured as described above is as follows.

Remote control automatic silencer of the video device according to the present invention configured as described above, first receives the video and audio signal of a specific channel to the video device main body 30, and when the FM-TX function is turned on, the sound signal to the FM signal It modulates as and transmits wirelessly to the remote controller 40.

That is, the tuner 31 receives a video and audio signal of a specific channel from a conventional digital or analog TV broadcast signal, and the audio data transmitter 32 receives an audio signal from the tuner 31 and modulates the signal into an FM signal. Wireless transmission to the remote control (40).

In this state, when the channel change signal input by the user to the video device main body 30 (S200); The video device main body 30 detects noise of the video signal generated when the channel is switched and compares it with a reference value (S210).

At this time, the controller 36 detects the channel switching by comparing the noise of the image signal output from the tuner 31 with a reference value.

Alternatively, the channel signal is detected by detecting the noise of the image signal output from the tuner 31 through the image signal noise detector 34 including the clamping circuit, and outputting the noise to the controller 36.

The controller 36, that is, the video IC has a register function for measuring the amount of noise in the input signal, and is used to determine the amount of noise reduction using this information. The present invention tries to prevent the output of unnecessary noise by finding out whether the signal channel is a signal channel or a no signal channel using the register.

Therefore, as an embodiment of the present invention, the state of the register is checked at every channel switching or the register state is checked at a predetermined period to detect the channel switching through the noise change amount of the video signal, and to block the noise output sound generated at the channel switching. At this time, even if there is a signal and disappears at any moment, it is regarded as noise and executes a mute function.

Therefore, it is possible to use quietly when connecting to an external device (e.g., audio, MP3, telephone, AV receiver, etc.) incorporating the FM-TX function.

On the other hand, the channel switching determination through the noise of the video signal in the above, for example can be implemented in the following two methods.

In the first method, noise is determined by comparing the amplitudes of surrounding pixels with each other in order to determine the noise level of each pixel, and calculating the SAD (Sum of Absolute Difference) and comparing the average of the values of the surrounding four pixels. The amount of noise can be known by calculating the difference.

Secondly, in the case of judging by H SYNC and Y SYNC, the input video signal is separated by only the SYNC TIP part using the clamping circuit to determine the format and the presence or absence of the SYNC signal. This information may be transmitted to the controller 36 to determine whether the channel is switched.

As such, when the channel determination is detected as a result of the comparison determination, output of the sound signal transmitted to the remote controller 40 is temporarily blocked (S220 to S230). That is, the controller 36 controls the wireless transmission state of the sound data transmitter 32, and when a channel change is detected from the tuner 31, temporarily cuts off the output of the sound signal transmitted to the remote controller 40. do.

The remote control 40 receives the sound signal under the control of the above step and outputs the sound signal to the speaker SPK (S250 to S270).

That is, the sound data receiver 41 receives and demodulates the sound signal transmitted from the video apparatus main body 30, and the sound output unit 43 receives the demodulated sound signal from the sound data receiver 41 by the speaker ( SPK). At this time, the control unit 42 outputs a predetermined control signal for controlling the sound output unit 43, and the clock oscillator 44 oscillates a clock of a predetermined frequency and supplies it to each unit.

In addition, the FM signal wirelessly transmitted by the video device 30 preferably uses a wireless transmission frequency of 2.4 GHz or 900 MHz band for short-range wireless communication.

The above-described silent remote control device and method of the video device of the present invention can be applied to all video and audio devices such as TVs, VCRs, monitors, TV receiver personal computers and set-top boxes (STBs), analog TVs, digital TVs, and The same applies to satellite TV. In addition, it can of course be applied to all NTSC, PAL, SECAM method.

Although the preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the above-described embodiments, and the present invention is not limited to the above-described embodiments without departing from the spirit of the present invention as claimed in the claims. Anyone skilled in the art can, of course, make various changes and make such changes as fall within the stated claims.

As described above, according to the remote control automatic silencer and the method of the video device according to the present invention, when the user changes the channel, the image signal on the screen is detected by detecting the channel change, the sound signal transmitted to the remote control By temporarily blocking and muting the output, the noise output to the speaker of the remote control is prevented. Therefore, the user does not need to hear loud noise when switching channels, and has an effect of preventing unnecessary vibration and extending the life of the speaker.

Claims (8)

A remote controller for outputting a wireless signal received wirelessly to the speaker; Receives an image signal of a specific channel and displays the corresponding image on the screen, and wirelessly transmits an audio signal of the image to the remote controller, and compares the amplitude of surrounding pixels of the image with each other and compares the sum of absolute difference according to the degree. ), And compare the average with the average value of the surrounding pixels to calculate the difference to determine the channel switching according to the change of noise, and the main body of the video device to temporarily cut off the audio signal transmitted to the remote Remote control silent device of a video device comprising a. The method of claim 1, The main body of the video device A tuner for receiving video and audio signals of the specific channel; A sound data transmitter which receives a sound signal from the tuner and modulates it into an FM signal and wirelessly transmits the sound signal to the remote controller; And controlling a wireless transmission state of the sound data transmitter, and when the channel change is detected from the tuner, temporarily controlling the output of the sound signal transmitted to the remote controller. . The method of claim 2, The control unit, Remote control automatic silencer of a video device, characterized in that by using a clamping circuit to separate the SYNC TIP portion of the input video signal to determine the format of the video signal and the presence or absence of the SYNC signal to determine the channel switching . The method of claim 2, And a video signal noise detector for detecting noise of the video signal output from the tuner and outputting the noise to the controller. The method of claim 4, wherein The video signal noise detector Remote control automatic silencer of a video device, characterized in that consisting of a clamping circuit. The method of claim 1, The remote control An audio data receiver which receives and demodulates an audio signal transmitted from the video apparatus main body; And a sound output unit for outputting the demodulated sound signal from the sound data receiving unit to the speaker. An image device including a main body of a video device for receiving a video signal of a specific channel and displaying a corresponding video on a screen, and wirelessly transmitting the audio signal of the video to a remote controller, and a remote controller for outputting the wirelessly received sound signal to a speaker. In the remote control automatic silent method of, Outputting a sound signal received by the remote controller; Comparing amplitudes of surrounding pixels of the image in the main body of the image device, calculating a SAD (Sum of Absolute Difference) according to the degree, and comparing the average of the values of the surrounding pixels to calculate the difference, and thus the degree of change of noise. Determining channel switching according to the method; And temporarily blocking output of a sound signal transmitted to the remote controller when the channel change is determined by the main body of the video apparatus. The method of claim 7, wherein Channel switching determination in the main body of the video device Automatic silence control method for a remote control device of a video device, characterized in that by using a clamping circuit to separate the SYNC TIP portion of the input video signal to determine the format of the video signal and the presence or absence of the SYNC signal to determine the channel switching .

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