KR0139195B1 - Method and device for searching an outsider using side screen - Google Patents

Abstract

The present invention relates to a method and an apparatus for displaying an NTSC video signal on a screen having a predetermined aspect ratio and a screen having a predetermined wide aspect ratio. In particular, the present invention relates to 4: 3 of a 16: 9 screen. Part of the present invention relates to a method for displaying a video signal input from the outside at the same time and a device for displaying the main screen signal. The video signal from the external camera is automatically displayed at the sub-signal position in the presence of the external doorbell switch signal. The user monitors the display status and sends a signal to open the door, and automatically turns off the external camera signal on the screen by the door open signal and maintains the original screen display state.

Description

External search method using sub-screen and its device

1 is a block diagram showing an embodiment of an external searcher using a sub-screen according to the present invention;

2 is a detailed block diagram of a control signal generator in the apparatus of FIG.

3 is a waveform diagram of each component of FIG.

4 is a partial block diagram included in the main screen processor of the apparatus of FIG. 1;

5 is a truth table of a control signal generator in the apparatus of FIG.

6 is a schematic diagram showing screen areas displayed on the apparatus of FIG.

Explanation of symbols on the main parts of the drawings

10: main signal processing unit 11: main signal separation unit

12, 14, 23: A / D converter 13: switch element

15: main screen processor 16, 25: D / A converter

20: sub-signal processing unit 21: selector

22: sub-signal separator 24: sub-screen processor

30: control signal generator 40: switching unit

50: display unit

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method and apparatus for searching for outsiders using a picture out picture (POP) in a television receiver having a wide aspect ratio, and particularly, to a high definition television (HDTV) and a device. The present invention relates to a method for searching outsiders and a device using a sub-screen for displaying image information from an external camera in a margin generated when displaying an NTSC broadcast on a television having a wide aspect ratio.

The current National Television System Comittee (NTSC) television has an aspect ratio of 4: 3, but the aspect ratio that a person can feel the most real or lively is the aspect ratio of 16: 9, which is the aspect ratio of high definition television. Even before the broadcast, a method and apparatus for displaying NTSC broadcast or video tape recorder video signal of VISTA (Visual System Transmission Algorithm) size on a 16: 9 television receiver have recently emerged. When NTSC broadcasting with 4: 3 aspect ratio is displayed on a 16: 9 television receiver, it is time-compressed and displayed in the center of the output screen, or left and right margins. Methods of displaying the same and devices thereof are also becoming common. In this way, there was a need for practical use in using the left and right margins.

Accordingly, an object of the present invention is to provide a method for automatically displaying a visitor's appearance on a sub-screen position by using an external doorbell signal and a signal from an external camera.

Another object of the present invention is to provide an apparatus for implementing the above-described external search method.

A feature of the present invention for achieving the above object is an apparatus for displaying a video signal composed of a predetermined aspect ratio as a signal suitable for a screen composed of a wide aspect ratio, wherein the video signal is any one of a plurality of areas of the screen; A main signal processing unit having a main picture processor for time-compressing the video signal in accordance with a first control signal applied from a control signal generating unit so as to be displayed in an area of?, Means for generating image data for photographing an object to be monitored; The image data is reduced in response to a second control signal applied from a control signal generator to display the image data in a specific area of the screen, and the image signal from the main signal processor and the sub signal processor Applying a third control signal to the switching unit for controlling each to be output alternately in units of scan lines. A sub-signal processing unit having a screen processor, a control signal generator for applying the first control signal to the main screen processor in response to a predetermined external sound signal, and applying the second control signal to the sub-screen processor; A switching unit for alternately outputting an image signal of the main signal processing unit and an image signal of the sub-signal processing unit in response to a third control signal from the sub-signal processor, and a display unit for displaying an output signal of the switching unit; An external search method using an included sub-screen.

Another aspect of the present invention provides a method for displaying a video signal having a predetermined aspect ratio as a signal suitable for a screen having a wide aspect ratio, wherein the video signal is displayed on any one of a plurality of regions of the screen. 1) compressing the video signal according to a control signal to form a main video signal; photographing a subject to be monitored; generating image data; and displaying the image data in a specific area of the screen. Reducing the image data according to a signal to form a sub-picture signal, alternately outputting and displaying the main video signal and the sub-video signal according to a third control signal, and displaying the sub-picture displayed on the screen. In response to the operator's response to the video signal, the display returns to the screen state before the external sound signal was applied. To provide an external searcher using a sub-screen comprising a step.

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

1 is a block diagram of an external searcher using a sub-screen according to the present invention. The apparatus of FIG. 1 is divided into a main signal processor 10, a sub-signal processor 20, a control signal generator 30, and a switch unit constituting a small screen in the space of the left and right sides of the main video signal. 40) and a display section 50 having an aspect ratio of 16: 9. The main signal processor 10 includes a main signal separator 11, A / D converters 12 and 14, a switch element 13, a main picture processor 15, and a D / A converter 16. In more detail, the main signal processing unit 10 has a luminance indicating a signal such as a video signal of a black and white television in order to have compatibility between color and black and white television in the composite video signal Vi input according to NTSC broadcasting. A main signal separator 11 for separating the signal Y, the red difference signal RY, and the blue difference signal BY, and an A / D converter 12 for converting the luminance signal Y into digital data; And a switch element 13 for switching the red difference signal RY and the blue difference signal BY according to a control signal CTL applied from a predetermined controller (not shown), and the switched color difference signals RY and BY. ) A / D converter 14 for converting the digital data into digital data, the luminance (Y) and the color difference signal (RY, BY) converted to the digital data are applied, and the time can be displayed on a screen having an aspect ratio of 16: 9. Compression processing main screen processor 15, time-compressed digital data analog It consists of a D / A converter 16 for converting into a signal.

The sub-signal processing unit 20 receives three video signals V ₁ to V ₃ and an external camera input signal to each input terminal, and selector 21 for selecting and outputting data of the input terminal by a selection signal from the outside. And a sub-signal separator 22 for separating and outputting a signal output from the selector 21 into a luminance signal Y ', a red difference signal R-Y', and a blue difference signal B-Y '. And an A / D converter 24 for converting the luminance signal Y 'and the color difference signals R-Y' and B-Y 'output from the sub-signal separator 22 into digital data, respectively, and a digital image. And a sub picture processor 24 for reducing data to fit the sub picture area, and a D / A converter 25 for converting digital image data processed into sub pictures into an analog signal.

The control signal generator 30 outputs a signal Q _OUT for controlling to select an external camera input signal in response to a door bell signal V _DB applied from the outside, and a signal V _DISP applied from the outside. Means for outputting a signal (V _DISP ') for turning on / off the operation of the sub-screen processor (24) in response to the control panel and determining the mode to be displayed in response to the signals (M ₁ , M ₀ ) applied from the outside. Means for outputting control signals (M ₁ ′, M ₀ ′), and a means for receiving a signal (V _D0 ) for _{returning the} screen state to an original state and for outputting a signal (V _OUT ) for opening a door. Doing.

The switching unit 40 outputs the main screen image signal V _D1 output from the D / A converter 16 of the main signal processing unit 10 and the D / A converter 25 of the sub signal processing unit 20. A control signal BLK for receiving a sub-screen video signal V _D2 and controlling the display of the main screen video signal and the sub-screen video signal on the screen from the sub-screen processor 24 of the sub-signal processing unit 20. ) And means for selectively switching the main screen video signal (V _D1 ) and the sub-screen video signal (V _D2 ) to display on the 16: 9 screen.

In FIG. 1, the main signal separator 11 of the main signal processor 10 receives a complex image signal Vi from an external device, such as a luminance signal Y, a red difference signal RY, and a blue difference signal BY. And print it out. The luminance signal Y is converted into a digital signal by an A / D converter 12 and supplied to the main screen processor 15. The color difference signals RY and BY are switched by the switch element 13 supplied with a control signal CTL applied from a predetermined control unit (not shown), and the A / D converters 14 are sequentially switched and output. Converts an analog signal into digital data. The converted digital signal is supplied to the main picture processor 15. At this time, the main screen processor 15 performs time compression processing on the video signal according to predetermined 2-bit information M ₁ ′ and M ₀ ′ supplied from the control signal generator 30 to the D / A converter 16. send. The D / A converter 16 converts the digital image data into an analog signal and displays it on a screen having an aspect ratio of 16: 9. According to the operator's selection signal, a plurality of video signals V ₁ to V ₃ and external camera signals are selected to display the main video signal of the screen having an aspect ratio of 16: 9 and displayed in the remaining margins. At this time, when the door bell (Door Bell) rings from the outside, the door bell signal (V _DB ) of the high (High) state is input to the control signal generator 30. The control signal generator 30 generates a high signal in response to the door bell signal V _DB . When a high signal Q _OUT is applied to each of the first and second logical sum gates OR1 and OR2, the signal Q _OUT is applied to any one of four input terminals of the selector 21 of the sub-signal processing unit 20. Regardless of the operator's selection signal for controlling the signal to be selected, the state of the signal S ₁ S ₀ for selecting the input terminal of the selector 21 is 11 ₂ to select the external camera input signal. The image pickup signal of the selected visitor is separated into a luminance signal Y ', a red difference signal R-Y', and a blue difference signal B-Y 'by the sub-signal separator 22. Each signal is converted into digital data by the A / D converter 23. When the user wants to see the signal selected by the selector 21 on the screen, the user must apply the display signal V _DISP . However, when the doorbell signal V _DB is applied, a signal V _DISP 'for controlling the sub-screen processing operation is automatically generated from the control signal generator 30. The sub picture processor 24 receiving the control signal V _DISP ′ reduces the digitally converted data to a signal suitable for the sub picture. The signal processed as the sub picture is supplied to the D / A converter 25, converted into an analog signal, and the converted signal is supplied to the switching unit 40. The switching unit 40 that receives the control signal BLK output from the sub-screen processor 24 is connected to the main screen image signal V _D1 of the main signal processing unit 10 by a logical change of the control signal BLK. The sub picture image signal V _D2 of the sub signal processor 20 is selectively output in units of scan lines. The main picture video signal V _D1 and the sub picture video signal V _D2 are selectively displayed on a screen having an aspect ratio of 16: 9 so that visitors can be identified. After confirming the visitor and applying a signal V _D0 to the control signal generator 30 to return the screen state to the original state, the control signal generator 30 sends a signal V _OUT to open the door. (Not shown) to open the door. The signal of the low state is applied from the control signal generator 30 to the first and second logical sum gates OR1 and OR2 at the same time as the door is flamed, so that the selector 21 controls the operator's selection signal. Will return to the original state.

2 shows a detailed block diagram of the control signal generator 30 of FIG.

FIG. 3 is a waveform diagram of each component for explaining the operation of the control signal generator 30 of FIG. 2 and will be described with reference to FIG.

In Fig. 2, when the visitor presses the doorbell, the bell signal (V _DB waveform shown in Fig. 3) is input from the doorbell to the S terminal of the flip-flop FF. Then, the output signal (Q _OUT waveform shown in FIG. 3) of the output terminal Q of the flip-flop FF goes from low to high. The output signal Q _OUT is applied to the third logical OR gate irrespective of the signal V _DISP for monitoring the video signal of the visitor picked up by the external camera to make the output high. The high output of the third logical OR gate OR3 turns on the sub picture processor 24 by turning the signal V _DISP 'high to operate the sub picture processor 24 of FIG. 1 high. ON). The predetermined 2-bit information M ₁ , M ₀ is a signal for the user to select four modes such as (a), (b), (c), and (d) of FIG. 6. When the output signal V _DISP ′ of the flip-flop FF becomes high, predetermined 2-bit information M ₁ and M for determining a mode in which the main screen video signal V _D1 is displayed on the screen. Regardless of ₁ ), the negative output of the third logical gate OR3 is applied to the AND gate AND, and the output of the third logical gate OR3 is applied to the fourth logical gate OR4 so that each output ( M ₁ ', M _0') is ₁₂ is a. portion signal that is, the external signal that sets the position to the display of the camera signal (M ₁ ', M _0') is ₁₂ as in the sixth degree (e) The main video signal is displayed on the left side and the sub-signal is displayed on the right side.The signal to open the door and restore the screen after the user monitors the sub-signal (V _D0 waveform shown in Fig. 3). ) is generated. signals (V _D0) for making a state of the original screen is the statement in the predetermined door open device (not shown) Is supplied to the signal (V _OUT) for group is applied to, and at the same time R terminal of the flip-flop (FF) to open the door. Then, the output signal (Q _OUT) of the output terminal (Q) of the flip-flop (FF) is a high It changes from High to Low to turn off the operation of the sub picture processor 24 of Fig. 1. The momentary 2-bit information at which the output signal Q _OUT goes low. The output of (M ₁ ′, M ₀ ′) is determined by the initial predetermined 2-bit information (M ₁ , M ₀ ), so that the screen is in the initial state, that is, one of the four modes shown in (6) to (D). Will go back.

4 is a block diagram for explaining the operation of the line memory included in the main screen processor 15 of FIG. In FIG. 4, the main picture processor 15 of FIG. 1 is a part which enables to display an NTSC video signal having an aspect ratio of 4: 3 on a 16: 9 screen using a plurality of line memories. An image is stored in each of the plurality of line memories according to the write clock pulse CLKw and the read clock CLK _R having a predetermined frequency corresponding to the signals M ₁ ′ and M ₀ ′ for determining the mode to be displayed on the screen. The signal D _IN is alternately recorded and the recorded video signal D _OUT is output.

5 shows the states of M ₁ and M ₀ for each mode to be displayed on the screen. In FIG. 5, when the predetermined 2 bit information M ₁ and M ₀ are 0, the first clock 1 is the first mode 1, the second mode 10 is the third mode 11, the fourth mode is the read clock CLK _{R of} 19 MHz. The clock is used and the write clock (CLKw) is clocked at 14 MHz and 19 MHz. In other words, a clock of 14 MHz is used for the write clock CLKw in the first, second, and third modes, and 19 MHz is used for the write clock CLKw in the fourth mode. For the read clock (CLK _R ) and the write clock (CLKw) according to the four modes, time read processing is performed by making the read clock (CLK _R ) faster than the write clock (CLKw). When the output signal QOUT of the flip-flop FF of FIG. 2 is low, the area to be displayed is determined by the initial predetermined 2-bit information M ₁ and M ₀ . When the output signal Q _OUT of the flip-flop FF is high, 2-bit information M ₁ ′, M ₀ ′ output regardless of the initial predetermined 2-bit information M ₁ , M ₀ . Is always in the state of 1 ₂ to become the display area according to the second mode.

FIG. 6 is a schematic diagram for explaining the screen area displayed by the apparatus of FIG. 1, wherein the area of the displayed screen can be selected from four kinds of modes by combining predetermined 2-bit information (described in FIG. 5). Among the four modes in the present invention, the first, second, and third modes are obtained by time-compressing the read clock CLK _R faster than the write clock CLKw, and the fourth mode includes the write clock CLKw. The read clock (CLK _R ) is the same and no time compression is done. FIG. 6A is a diagram showing a first mode in which 908 pixels of a screen having an aspect ratio of 4: 3 are displayed in the center of the screen having an aspect ratio of 16: 9. 6 (b) is a second mode in which an image signal is displayed on the left side of the screen with an aspect ratio of 16: 9. FIG. 6 (c) is a third mode in the right side of a screen having an aspect ratio of 16: 9. Fig. 1 shows an image signal displayed on the screen. 6 (d) is a fourth mode and is displayed on a 16: 9 screen as it is. At this time, the left and right screens are spread, but the problem is solved when the screen is stretched in the vertical direction. 6 (E) is an exemplary diagram in which a sub-screen video signal is displayed in the right margin in the state of the second mode shown in FIG. 6 (B).

As described above, in displaying NTSC broadcasting on a screen having a wide aspect ratio of 16: 9, an input signal from an external camera is displayed at a position of a sub-signal (POP: Picture Out Picture), and an external door is operated by a user's operation. It is expected to not only search outsiders by sending the door open control signal and return the screen state to the original position, but also to use it as a field of home automation.

Claims (12)

An apparatus for displaying a video signal composed of a predetermined aspect ratio as a signal suitable for a screen composed of a wide aspect ratio, A main signal processor including a main screen processor configured to time-compress the video signal according to a first control signal applied from a control signal generator so that the video signal is displayed on any one of a plurality of areas of the screen; Means for photographing an object to be monitored to generate image data; The image data is reduced in response to a second control signal applied from a control signal generator to display the image data in a specific area of the screen, and the image signal from the main signal processing unit and the video signal from the sub signal processing unit. A sub-signal processing unit having a sub-screen processor for applying a third control signal to the switching unit to control each of the scan lines to be alternately output; A control signal generator for applying the first control signal to the main picture processor and the second control signal to the sub picture processor in response to a predetermined external sound signal; A switching unit which alternately outputs an image signal of the main signal processing unit and an image signal of the sub signal processing unit in response to a third control signal from the sub picture processor; And External search device using a sub-screen including a display for displaying the output signal of the switching unit. The apparatus of claim 1, further comprising a selector for selecting one of a plurality of external image signals and the image data and outputting the image signal to the sub-signal processing unit according to an operator's selection signal. The image data of the plurality of input terminals of the selector according to claim 2, wherein when a predetermined external sound signal is applied to the control signal generator, the image data is selected from among the plurality of input terminals of the selector regardless of the operator's selection signal. An external searcher using a sub-screen comprising means for selecting an authorized input terminal. The apparatus of claim 1, wherein the main screen processor compresses the video signal in time in response to a control signal for determining an area in which the video signal is to be displayed on the screen. The image processing apparatus of claim 4, wherein the main picture processor is further configured to display the image in a predetermined area according to the first control signal of the control signal generator regardless of the control signal when a predetermined external sound signal is applied to the control signal generator. An external searcher using a sub-screen, wherein the video signal is compressed in time so that a signal is displayed. The search for an outsider using the sub-screen according to claim 2, wherein the sub-screen processor reduces the output signal of the selector according to a second control signal applied from the control signal generator in response to an external operation signal. Device. A method for displaying a video signal composed of a predetermined aspect ratio with a signal suitable for a screen composed of a wide aspect ratio, Time compressing the video signal according to a first control signal to form the main video signal such that the video signal is displayed on any one of a plurality of areas of the screen; Photographing a subject to be monitored to generate image data; Reducing the image data according to a second control signal so as to display the image data in a specific area of the screen and forming the sub-picture signal; Alternately outputting and displaying the main video signal and the sub video signal according to a third control signal; and And returning to a screen state before a predetermined external sound signal is applied according to an operator's response signal to the sub-image signal displayed on the screen. 8. The search method according to claim 7, wherein the first control signal comprises two bits of information. The search method according to claim 7, further comprising selecting one of a plurality of external image signals and the image data and applying the image data when the sub image signal is formed according to an operator's selection signal. 10. The method of claim 9, wherein when the predetermined external sound signal is supplied, the image data is selected regardless of the operator's selection signal. 8. The method of claim 7, wherein the first control signal controls to display the video signal in a predetermined area of the screen in response to a predetermined external sound signal. The method of claim 7, wherein the third control signal is configured to alternately output each of the main image signal and the sub image signal in units of scanning lines.