KR0137526B1 - Apparatus for controlling verticality screen width of television - Google Patents

Abstract

The present invention is to reduce the vertical width of the current screen in accordance with the detection of the audio multiple signal when the user is required to switch to the movie aspect ratio in a television capable of voice multiple broadcasting so that the effect of the movie can be obtained It is to provide a vertical screen width control device for a television.

To this end, according to the present invention, in a television capable of voice multicasting, a key input unit 12 further comprising a movie screen mode setting key 12a for requesting switching to a movie aspect ratio, and a main audio channel and a sub-audio channel, respectively. First and second signal detection units 14 and 16 and corresponding first and second signal detection units 14 and 16 installed correspondingly to detect presence or absence of voice signals transmitted from the main audio channel and the sub audio channel. Logic element 18 for receiving and outputting an output signal from the control unit 18 and controlling the operation of the first and second signal detection units 14 and 16 when a movie screen mode is set in the key input unit 12. The microcomputer 20 outputs a predetermined vertical width adjustment control signal for the currently displayed screen based on the result of the logic device 18, and the vertical output circuit unit 24 under the control of the microcomputer 20. Vertical output voltage control to control vertical output voltage of Consists of 22, the logic device 18 is composed of the AND gate.

Description

TV's vertical screen width control device

1 is a block diagram of a general voice multiple receiver;

2 is a block diagram of a vertical screen width control apparatus for a television according to an embodiment of the present invention;

3 is a view showing an example of a key input unit shown in FIG.

4 is a flowchart showing the control processing procedure and control contents of the microcomputer shown in FIG.

* Description of the symbols for the main parts of the drawings *

1 --- image detector, 2 --- 4.5MHz filter,

3--4.72 MHz filter section, 4,5--first and second speech demodulation section,

6,7 --- amplifier, 8 --- aware signal detector,

9 --- Dematrix 10 --- Selective switching unit,

12 --- key input, 14,16 --- first and second signal detectors,

18 --- logic element, 20 --- microcom,

22 --- Vertical Output Voltage Control, 24 --- Vertical Output Circuit.

The present invention relates to a vertical screen width control apparatus of a television, and more particularly, in a television capable of receiving voice multiple broadcasts, when the user selects a movie screen mode, a current voice multicast program is broadcasted so as to reduce the vertical width of the current screen. It relates to a vertical screen width control device of a television to adjust the effect of watching a movie.

As is well known, in order to receive voice multicasting, a voice multicasting television should be used, but in order to receive voice multicasting on an existing television other than voice multicasting, an additional adapter should be attached. In other words, since a single television can only receive a single voice, it is necessary to separate two voice or stereo broadcasts by an additional device.

There are various methods of such voice multiple broadcasting, but two-carrier systems are mainly used by using two radio waves having different frequencies. In other words, the conventional single voice system emits a 4.5MHz higher audio signal than the video signal when the TV is broadcasted by one broadcasting station, but the voice multiplex method using the two-carrier method is 4.5 than the video signal and the video signal. It is simultaneously firing a voice signal of high MHz and other sound waves of 4.7242 MHz higher than that of the image signal.

As shown in FIG. 1, the general voice multiplexing device includes an image detector (1) for AM detecting an intermediate frequency signal to obtain a composite signal mixed with a video signal, a first audio signal, and a second audio signal. And a 4.5 MHz filter unit 2 for passing only the first audio signal in the 4.5 MHz band from the image detector 1 and a second audio signal in the 4.7242 MHz band from the image detector 1. A first speech demodulator 4 for extracting a first audio signal from which noise components are removed from the 4.5 MHz FM signal passed through the 4.72 MHz filter unit 3 and the 4.5 MHz filter unit 2, and the 4.72 MHz filter unit From the second audio demodulator 5 and the first and second audio demodulators 4 and 5 which extract the second audio signal and the recognition signal from which the noise component has been removed from the 4.72 MHz FM signal passing through (3). AM amplification unit 6 and 7 for amplifying corresponding audio signals corresponding to the audio signals of the second audio demodulator 5 Recognition signal detector 8 for extracting a recognition signal (e.g., stereo signal or multiplex audio signal), in phase between the L + R signal (i.e., mono signal) as the first audio signal and the LR signal as the second audio signal. A recognition circuit extracted from the recognition circuit detector 9 and a recognition circuit detector 9 for synthesizing (adding) or synthesizing (subtracting) the L + R signal and the LR signal out of phase and separating the L and R signals. It is composed of a selection switching unit 10 for switching switching to output a stereo signal or a multiple sound signal according to the signal.

Referring to the operation of the general voice multiplexing device configured as described above are as follows.

When the viewer selects the desired broadcast channel, the intermediate frequency signal (IF signal) of the broadcast program for the broadcast channel tuned by the tuner (not shown) is transferred to the image detector through an intermediate frequency amplifier (not shown). 1) is applied. Accordingly, the image detector 1 detects an AM signal of the intermediate frequency signal, a first audio signal which is an FM signal of 4.5 MHz, which is used for stereo broadcasting, and audio multicasting (that is, a native language and A composite signal obtained by mixing a second audio signal, which is a 4.72 MHz FM signal, used in a foreign language) is obtained.

In this case, the second audio signal is typically included with an identification signal, and the identification signal is sent to distinguish whether the receiver is performing stereo broadcasting or multiple voice broadcasting. In case of stereo broadcasting, the recognition signal is a 50% amplitude-modulated subcarrier of 55.0699 KHz (3.5 times the horizontal synchronization signal frequency) to 149.9 Hz (1/05 of the horizontal synchronization signal frequency). In case of broadcasting, it is a signal that 50% amplitude modulation of 55.0699KHz subcarrier to 276.0Hz (1/57 of horizontal synchronization signal frequency). In particular, in the case of mono broadcasting, the recognition signal becomes 0 Hz.

As such, as the image signal, the first audio signal, and the second audio signal are output from the image detector 1, only the first audio signal is filtered through the 4.5 MHz filter unit 2, so that the first audio demodulator 4 is removed. At the same time, the first audio signal is extracted, and at the same time, only the second audio signal is filtered through the 4.72 MHz filter unit 3, and the second audio demodulation unit 5 extracts the second audio signal and the recognition signal.

Thus, the audio signals from the first and second voice demodulators 4 and 5 through the amplifiers 6 and 7 are applied to the wagon circuit unit 9, wherein the recognition signal detector 8 receives the first signal. The recognition signal is extracted from the output signal from the two speech demodulator 5.

In this way, when the first and second audio signals are applied to the wagon circuit unit 9, the wagon circuit unit 9 synthesizes (adds and subtracts) the first and second audio signals and separates the L and R signals. Let's go. At this time, when the recognition signal detected by the recognition signal detection unit 8 is 149.9 Hz, it is connected to the stereo output stage ST to output a stereo signal, whereas when the recognition signal is 276 Hz, it is connected to the multiple output terminals DU. Therefore, the audio multiplex signals of the R and L channels are output through the amplifiers 6 and 7.

As described above, in a television that adopts a two-carrier method and receives a voice multiple broadcast, most viewers use a key input means to play a main voice (i.e., a native language) mode or sub-channel when watching an arbitrary voice multiple broadcast program. After selecting a voice (ie, a foreign language) mode or a multi-voice mode in which main and sub-voices are mixed, the user can watch.

However, the above-mentioned voice multiple broadcasting is mainly used in movie programs, and in the case of wide televisions (for example, televisions having aspect ratios of 4: 3 and 16: 9 in both aspect ratios), You can watch while changing the aspect ratio as you wish, but in the case of a TV whose aspect ratio is limited to 4: 3, you cannot feel the presence of a sense of presence on wide television.

Accordingly, the present invention has been made in view of the above circumstances, and its object is to reduce only the vertical width of the current screen according to whether a voice multiple signal is detected when the user requests to switch to a movie aspect ratio in a television capable of multiple voice broadcasting. It is to provide a vertical screen width control device for a television to obtain a movie watching effect by adjusting.

In order to achieve the above object, a vertical screen width control apparatus for a television according to the present invention includes a key input unit further including a movie screen mode setting key for requesting switching to a movie aspect ratio in a television capable of voice multicasting; First and second signal sensing units installed correspondingly to the main audio channel and the sub-audio channel, respectively, to detect the presence or absence of a voice signal transmitted from the main audio channel and the sub-audio channel, and from the first and second signal sensing units. A logic element for receiving and outputting an output signal of the controller; controlling the operation of the first and second signal detection units when a movie screen mode is set in the key input unit and being currently displayed based on the result of the logic collection. A microcomputer that outputs a predetermined vertical width adjustment control signal for a screen, and a vertical that controls the vertical output voltage of the vertical output circuit unit under the control of the microcomputer. It consists of an output voltage controller.

According to a preferred embodiment of the invention, the logic element consists of an end gate.

According to the present invention configured as described above, when a viewer requests to switch to the movie screen mode while watching a television capable of voice multicasting, the first and second signal detection units respectively correspond to the main audio channel under the control of the microcomputer. And detecting the presence or absence of a voice signal transmitted from the sub-audio channel, and the detected signal is logically processed by the logic device and input to the microcomputer, and the signal input to the microcomputer is a high level signal (i.e., current voice multiplexing). Signal), the vertical output voltage control unit controls the vertical output voltage of the vertical output circuit so that the vertical width of the current screen is reduced. The effect of watching a movie can be obtained.

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

2 is a block diagram of a vertical screen width control apparatus for a television according to an embodiment of the present invention. Preferably, an embodiment of the present invention includes a key input unit 12 and a first and second signal detection unit 14; 16), a logic element 18, a microcomputer 20, and a vertical output voltage control unit 22.

The key input unit 12 includes a plurality of function selection keys (for example, a main voice mode key, a sub voice mode key, a voice multi mode key, a channel up / down key, a volume control key, a power on / off key, and the like). A viewer watching a television capable of voice multicasting transmits an operation command signal for performing an operation of a corresponding function by operating an arbitrary key to the microcomputer 20 which will be described later.

In particular, as shown in FIG. 3, the key input unit 12 converts the aspect ratio of the conventional television (ie, the aspect ratio of 4: 3) into the movie aspect ratio (ie, 16: 9), not the wide TV. It is preferable that the remote control further comprises a movie screen mode setting key 12a to be switched to.

Here, in the present invention, the movie screen mode setting key 12a is installed in a remote controller as a remote control device that is a key input unit 12, but may be installed in a front control panel of a television.

The first signal detecting unit 14 is installed to correspond to a main audio channel (for example, a voice channel in which a native language is output), and when the movie screen mode is set by the key input unit 12 under the control of the microcomputer 20 which will be described later. After digital conversion of the main audio signal transmitted from the main audio channel, the presence or absence of the main audio signal is detected.

The second signal detection unit 16 is installed to correspond to the sub-audio channel (eg, a voice channel for outputting a foreign language), and when the movie screen mode is set by the key input unit 12, the sub-signal unit 16 is controlled under the control of the microcomputer 20. After digital conversion of the negative audio signal transmitted from the voice channel, the presence or absence of the negative audio signal is detected.

The logic element 18 receives an AND signal from the first and second signal detection units 14 and 16, respectively, and performs an AND operation on the logic element 18. The AND gate transfers data based on the result to the microcomputer 20. to be.

The microcomputer 20 controls the overall operation of the television with the voice multicasting function based on the operation command signal input from the key input unit 12, and in particular the key 12a for setting the movie screen mode of the key input unit 12. When is pressed, the logic value from the logic element 18 is checked to control the vertical output voltage control unit 22 so that the vertical screen width adjustment operation is performed only when a high level signal (ie, 1) is applied. Done.

When the vertical output voltage control signal is applied from the microcomputer 20, the vertical output voltage control unit 22 amplitudes of the vertical output voltage of the vertical output circuit unit 24 to allow sufficient current to flow to the deflection coil or the converging circuit of the load. The control is made so that switching to the movie aspect ratio (ie, 16: 9) is achieved by reducing the

The operation of the apparatus for controlling the vertical screen width of a television according to an embodiment of the present invention configured as described above will be described with reference to the flowchart of FIG.

In the description of an embodiment of the present invention, a television (aspect ratio of 4: 3 aspect ratio) has a voice multicasting function, a main voice is set as a native language, and a sub-voice is set as a foreign language by way of example.

First, the microcomputer 20 determines whether or not the movie screen mode is set (step 40). If the movie screen mode is not set, the vertical screen width adjusting operation is not performed. (3) an arbitrary video is watched (step 42).

However, when the movie screen mode is set as the viewer presses the movie screen mode setting key 12a on the key input unit 12, the first signal detecting unit 14 controls the main audio channel under the control of the microcomputer 20. The second signal detecting unit 16 detects whether the sub audio signal is applied from the sub audio channel (step 44). For example, a current movie program is broadcast. When a drama in which mono sound is output is being broadcast, the logic value of the logic element 18 through the first and second signal detection units 14 and 16 becomes low level (ie, 0). Since the low level signal is applied to the microcomputer 20, under the control of the microcomputer 20, as in the above-described step 42, the viewer can watch an arbitrary image by the current aspect ratio.

On the contrary, in the case where a multi-movie program is currently being broadcasted, the first signal detection unit 14 receives a main audio detection signal and the second signal detection units 14 and 16 respectively output a negative audio detection signal. Since it is applied to (18), the logic value of the logic element 18 is at a high level (i.e., 1) (step 46). Accordingly, the vertical output voltage controller 22 receives the vertical screen width control signal from the microcomputer 20 to reduce the amplitude of the vertical output voltage of the vertical output circuit 24 to produce a movie aspect ratio (that is, 16: 9). (Step 48).

In this way, as the vertical screen width is reduced, an image having an aspect ratio similar to the movie aspect ratio is displayed on the CRT (step 50), so that the viewer can taste the feeling that they are currently watching a movie.

According to the present invention as described above, when watching a voice multiple broadcast program, when the viewer needs to switch to the movie screen mode, the vertical width of the currently displayed screen is reduced to become similar to the movie aspect ratio, Even television (that is 4: 3 aspect ratio) has the advantage that you can fully enjoy the movie.

Claims (2)

In a television capable of voice multiple broadcasting, A key input unit 12 further comprising a movie screen mode setting key 12a for requesting switching to a movie aspect ratio; First and second signal detectors 14 and 16 installed correspondingly to the main audio channel and the sub audio channel, respectively, to detect the presence or absence of a voice signal transmitted from the main audio channel and the sub audio channel; A logic element 18 which receives and outputs the output signals from the first and second signal detection units 14 and 16, When the movie screen mode is set in the key input unit 12, the first and second signal detection units 14 and 16 are controlled to be operated, and the current display is performed based on the result of the logic element 18. A microcomputer 20 for outputting a predetermined vertical width control signal for the screen to be displayed; And a vertical output voltage control unit (22) for controlling the vertical output voltage of the vertical output circuit unit (24) under the control of the microcomputer (20). The apparatus of claim 1, wherein the logic element (18) comprises an end gate.