KR19980069395A - Horizontal position automatic conversion device of CRT screen by recognition of broadcasting type - Google Patents

Abstract

The present invention relates to a horizontal position automatic conversion device of a CRT screen by broadcast type recognition, wherein the horizontal position automatic adjustment mode allows the concealed video portion of the video signal displayed on the CRT screen to be shifted and displayed in the CRT effective screen. A remote controller 20 for setting the control unit, a broadcast type recognition unit 28 for recognizing the type of a broadcast program based on the video signal, and a video signal displayed on a CRT effective screen according to the recognized broadcast type. The control unit 22 for controlling the position adjustment automatically, the automatic mode setting unit 34 in which the horizontal position automatic adjustment mode is set, and the horizontal position adjustment speed of the video signal for the CRT effective screen executed in the horizontal position automatic adjustment mode. By the positioning speed setting unit 36 set according to the broadcasting type and the positioning speed data applied from the control unit 22 according to the broadcasting type. It is configured by a horizontal position adjusting timing setting part 40 to set the horizontal position adjustment timing for the video signal of the processor 26.

Description

Horizontal position automatic conversion device of CRT screen by recognition of broadcasting type

The present invention relates to a horizontal position automatic conversion device of a CRT screen by broadcast type recognition, and more particularly, to recognize an ID code for identification of a broadcast type from a composite video signal of a broadcast program, and to display an effective screen of a CRT device among video signals. The present invention relates to a horizontal position automatic conversion device of a CRT screen by broadcasting type recognition for displaying the concealed image portions on the left and right sides in a variable speed and alternately on the CRT screen.

In general, in the case of a television which reproduces a video / audio of a broadcast program transmitted from a broadcast station and outputs it from a CRT screen and a speaker device, the video signal of the broadcast program is horizontally adjusted with respect to the center position of the CRT screen. Horizontal deflection system will be provided.

According to the horizontal deflection system of such a television, the horizontal scanning timing for matching the R / G / B color beams emitted from the R / G / B electron gun corresponding to the R / G / B color components of the video signal of the broadcast program Horizontal oscillation and output means for generating a deflection signal, and the horizontal deflection signal causes the actual R / G / B color ratio to be uniformly distributed on the CRT screen so that a corresponding R / G / B fluorescent point is emitted. It consists of a deflection coil.

Therefore, when the DC component of the horizontal deflection signal applied to the horizontal deflection coil is properly adjusted, the horizontal position of the image displayed on the CRT screen is adjusted to the left or the right.

Here, the video signal of the broadcast program is not displayed on the effective screen of the CRT apparatus as a whole, but includes a hidden video portion of approximately 10% (see FIG. 1), and the hidden video portion ('10' in FIG. 1). ), The timing of the horizontal deflection current flowing through the horizontal deflection coil can be displayed on the effective screen of the CRT apparatus ('10' in FIG. 1).

Therefore, most televisions are equipped with a horizontal position adjusting means for adjusting the horizontal position, the horizontal position adjusting means for adjusting the horizontal position of the video screen manually by the viewer and its horizontal position adjusting means. In response to the adjustment of the knob, a horizontal position adjusting element for adding or subtracting a horizontal deflection current flowing in the horizontal deflection coil is provided.

By the way, if the video signal displayed on the CRT device of the television includes a scene important to the video portion 10 'hidden from the left or right side of the CRT device, the hidden video portion 10' is validating the CRT device. There is a disadvantage that the viewer must artificially manipulate the horizontal positioning knob to be displayed on the surface.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and the concealed image portion of the effective screen of the CRT apparatus is horizontally adjusted to the left and the right in response to the recognized broadcast type. It is an object of the present invention to provide a horizontal position automatic conversion device of a CRT screen based on broadcast type recognition for display to a viewer.

In order to achieve the above object, according to a preferred embodiment of the present invention, an IF processing unit for IF-converting a composite video signal from a broadcasting station, and reproducing the video IF signal with an R / G / B signal to display on a CRT screen. A television having an image processing unit, comprising: a remote control for setting a horizontal position automatic adjustment mode in which a concealed video portion of a video signal displayed on the CRT screen is shifted and displayed in a horizontal direction on a CRT effective screen; A broadcast type recognition unit for recognizing the type of a broadcast program, a control unit for variable position control of the video signal displayed on the CRT effective screen in a horizontal direction according to the recognized broadcast type, and the horizontal position automatic adjustment mode is set Automatic mode setting unit, horizontal position adjustment of the video signal for the CRT effective screen executed in the horizontal position automatic adjustment mode Position adjustment speed setting unit whose speed is set according to the broadcast type, Horizontal position adjustment timing setting unit which sets the horizontal position adjustment timing according to the position adjustment speed data applied from the control unit according to the broadcasting type, CRT effective screen by the control unit Provided is a timer for setting a timing signal for changing a horizontal position of a video signal displayed on a horizontal position automatic conversion apparatus for a CRT screen by the broadcast type recognition.

According to the apparatus for automatically converting the horizontal position of the CRT screen by the broadcast type recognition according to the present invention having the above configuration, when the viewer sets the automatic horizontal position adjustment mode for the concealed video portion of the video signal, the current broadcast type is set. The concealed video portion can be displayed alternately on the effective screen of the CRT apparatus in response to the recognized broadcast type.

1 is a schematic diagram illustrating a state in which a video signal of a broadcast program is displayed on a CRT screen in a general television;

2 is a block diagram of a horizontal position automatic conversion apparatus for a CRT screen by broadcasting type recognition according to the present invention;

3 is a flowchart for explaining the operation of the horizontal position automatic conversion device of the CRT screen by the broadcasting type recognition according to the present invention;

4 is a view for explaining a horizontal position conversion state of the CRT screen by the apparatus for automatically converting the horizontal position of the CRT screen according to the broadcast type recognition according to the present invention.

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

20: remote control, 20a: mode setting button,

22: control unit, 24: IF processing unit,

26: image processing unit, 28: broadcasting type recognition unit,

32: timer, 34: automatic mode setting section,

36: positioning speed setting part, 40: horizontal positioning timing setting part,

42: Horizontal position adjusting section.

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

FIG. 2 is a block diagram illustrating a horizontal position automatic conversion device of a CRT screen based on broadcast type recognition according to the present invention. In the figure, reference numeral 20 denotes a remote control for specifying and selecting the overall function of the corresponding television, and the remote control 20 automatically adjusts the horizontal position of the CRT apparatus by the recognition of the broadcasting type according to the present invention. The mode setting button 20a for turning ON / OFF the mode for the above is provided.

In addition, 22 controls the execution of a specific function of the television set by the remote controller 20, and the automatic adjustment mode for the horizontal position of the CRT screen is provided by the mode setting button 20a of the remote controller 20. When set, the control unit controls the horizontal position of the CRT device to be alternately changed from the left and the right side by variable recognition by broadcasting type recognition so that the hidden video portion of the video signal is alternately displayed on the effective screen of the CRT device. Indicates.

24 denotes an IF processing unit which obtains an image IF signal PIF by performing intermediate frequency conversion processing on a composite video signal RF of a channel tuned by a tuner (not shown) under the control of the controller 22, and 26 denotes the image. An image processing unit which reproduces an IF signal PIF to obtain an R / G / B signal.

In addition, in FIG. 2, reference numeral 28 denotes a broadcast type recognition unit for recognizing the type of a broadcast program from the composite video signal RF processed by the IF processing unit 24. A plurality of first to third broadcast ID detection units 28a, 28b and 28c for recognizing a broadcasting ID code (preferably KBPS (Korean broadcasting program system) transmitted on a 21H line of a vertical blanking period of a composite video signal by broadcasting type. In this case, the first broadcast ID detection unit 28a recognizes a type of broadcast program related to, for example, news or talks / conferences containing a large amount of still images, and the second broadcast ID detection unit 28b. ) Recognizes a type of broadcast program related to a movie, an entertainment (show), or a sports that includes a large amount of moving picture components, and the third broadcast ID detection unit 28c is, for example, a drama or a documentary. According to the present invention, the broadcast type recognition unit 30 is configured to detect a specific broadcast ID code for the first to third broadcast ID detection units 28a to 28c. However, if necessary, the first to third broadcast ID detection units 28a to 28c are configured to detect the complexity of the screen (i.e., the moving picture component) with respect to the video signal of one frame to recognize the type of broadcast program. can be changed.

30 denotes an analog-to-digital converter for digitally converting the broadcast type recognition signal detected by the broadcast type recognition unit 28 to the control unit 22, and 32 denotes a CRT executed under the control of the control unit 22. Indicates a timer that provides a timing signal for changing the horizontal position of the screen, and 34 indicates that the horizontal position is automatically adjusted when the automatic adjustment mode for the horizontal position of the CRT screen is set by the mode setting button 20a of the remote controller 20. The automatic mode setting unit in which the adjustment mode flag is set to ON / OFF is shown.

In addition, 36 indicates a position adjustment speed setting unit in which an automatic adjustment speed for the horizontal position of the CRT screen is set according to the type of broadcast program recognized by the broadcast type recognition unit 28, and the position adjustment speed setting unit 36 ), When the type of the broadcast program (for example, news, talk / conference, etc.) is recognized by the first broadcast ID detector 28a of the broadcast type recognition unit 28, the current position of the CRT screen is not adjusted. Positioning speed data for maintaining the horizontal position of the program, and types of broadcast programs (eg, movies, entertainment (shows), sports, etc.) by the second broadcast ID detection unit 28b of the broadcast type recognition unit 28. Is detected, the position adjustment speed data for converting the horizontal position of the CRT screen from the left and the right at high speed, and the type of the broadcast program by the third broadcast ID detection unit 28c of the broadcast type recognition unit 28 ( For example, , Documentary, etc.) will be recognized if the position adjustment speed data to ensure that the horizontal position of the CRT screen, is adjusted to a relatively low speed is set. Here, the position adjustment speed data can be equally applied to the case where the first to third broadcast ID detection units 28a to 28c detect the complexity of the broadcast program (that is, the moving picture component).

38 is a digital-analog converting unit for analog-converting the positioning speed data when the positioning speed data for automatic adjustment of the horizontal position of the CRT screen is applied from the control unit 22 by the type recognition of the broadcast program. Indicates. 40 indicates a horizontal position adjustment timing setting section for varying the time constant of the AFC signal (i.e., horizontal scan timing signal) from the flyback transformer (FBT) (not shown) based on the analog converted position adjustment speed data. The horizontal position adjustment timing setting unit 40 has one end connected to a time constant resistor 40a connected to the AFC signal and one side of the time constant resistor 40a, and the analog position adjustment speed data is set by the analog converted position adjusting speed data. And a capacitance-variable diode 40b having a variable capacitance, and configured to variably set a time constant (ie, horizontal scan timing) of the AFC signal according to the positioning speed data.

42 denotes a horizontal position adjusting unit for generating a horizontal position adjusting signal for determining a horizontal scanning range of the image signal processed by the image processing unit 26 by the AFC signal whose time constant is changed, the horizontal position adjusting signal The image processing unit 26 causes the image portion concealed on the left side of the effective screen of the CRT apparatus and the image portion concealed on the right side of the effective screen of the CRT apparatus to be processed while being shifted at a high speed or relatively low speed, or the current horizontal position. Processing to ensure that is maintained.

Next, the operation of the horizontal position automatic conversion device of the CRT screen by the broadcasting type recognition according to the present invention having the above-described configuration will be described in detail with reference to the flowchart shown in FIG. 3 and the example of the horizontal position screen shown in FIG. do.

First, when the automatic adjustment mode for the horizontal position of the CRT screen is input by the mode setting button 20a of the remote controller 20, the controller 22 adjusts the horizontal position automatic adjustment mode to the automatic mode setting unit 34. The flag is set to ON.

In this state, when the corresponding television is turned on to tune into a specific channel (step 60), the composite video signal RF of the channel is applied to the IF processing unit 24 and subjected to intermediate frequency conversion, thereby making the video IF The signal PIF is obtained, and the image IF signal PIF is applied to the image processing section 26 to be reproduced.

At this time, the control unit 22 determines whether the automatic adjustment mode flag for the horizontal position of the CRT screen is set to 'ON' with reference to the automatic mode setting unit 34 in step 62. If the adjustment mode flag is not set to 'ON', control proceeds to step 64 in which the horizontal position of the current CRT screen is maintained (for example, the screen form of FIG. 1). That is, in that case, based on the horizontal position adjustment signal applied by the horizontal position adjustment unit 42 based on the AFC signal from the flyback transformer, the image processing unit 26 broadcasts the program to the center position of the effective screen of the CRT apparatus. The video signal reproduction processing is performed by horizontal scanning timing in which the centers of the video signals coincide with each other.

In contrast, if it is determined in step 64 that the automatic adjustment mode flag for the horizontal position of the CRT screen is set to 'ON', the flow advances to step 66 to perform recognition processing for the current broadcast program type. That is, when the automatic adjustment mode for the horizontal position of the CRT screen is set, the controller 22 activates and controls the broadcast type recognition unit 28, and accordingly the first- The third broadcast ID detection units 28a to 28c detect an ID code (or moving picture component) indicating the type of broadcast transmitted in 21H of the vertical blanking period of the composite video signal, and the ID code (or The moving picture component) is digitally converted by the analog-digital conversion unit 30 and applied to the control unit 22.

Therefore, the control unit 22 judges whether the broadcast type is recognized by the first broadcast ID detector 28a in step 68, and if the broadcast type is detected by the first broadcast ID detector 28a (step In step 68, the process proceeds to step 70, where the broadcasting type is recognized as a broadcasting type (e.g., news, talks / conferences, etc.) in which a stationary component is relatively strong. It is controlled to maintain the horizontal position.

On the other hand, if it is determined in step 68 that the broadcast type recognition is not performed by the first broadcast ID detection unit 28a, the flow advances to step 70 to determine whether the recognition of the broadcast type is performed by the second broadcast ID detection unit 28b. If the result of the determination is that the broadcast type is recognized by the second broadcast ID detection unit 28b, the flow advances to step 74 where the high speed horizontal position adjustment data set in the position adjustment speed setting unit 36 is read out. The digital-to-analog converter 38 is applied, and the analog-converted horizontal position adjustment data is applied to one end of the capacitance-variable diode 40b of the horizontal position adjustment timing setting unit 40. Accordingly, the AFC signal applied from the flyback transformer is adjusted at high speed by the time constant resistor 40a and the capacitance variable diode 40b, and the horizontal positioning signal is transmitted to the image processor 26. When applied, the image processing unit 26 performs horizontal scan timing at a high speed so that concealed image portions are alternately displayed on the left and right portions of the effective screen of the CRT apparatus in the horizontal direction of the image signal displayed on the effective screen of the CRT apparatus. As the reproduction process is performed while changing, the screen form shown in FIGS. 4A and 4B is displayed at a high speed on the effective screen of the CRT apparatus, thereby concealing a video signal for movie, entertainment or sports. It is possible to display the screen for the part.

On the other hand, if the judgment of the broadcast type is not performed by the second broadcast ID detection unit 28b as a result of the determination in step 72, the process proceeds to step 76 where the recognition of the broadcast type by the third broadcast ID detection unit 28c is performed. If it is determined that the broadcast type is recognized by the third broadcast ID detection unit 28c, the flow advances to step 78 where the relatively low horizontal position adjustment data set in the position adjustment speed setting unit 36 is determined. Is read and applied to the digital-to-analog converter 38. The analog-converted horizontal position adjustment data is applied to one end of the capacitance-variable diode 40b of the horizontal position adjustment timing setting unit 40, so that the AFC signal is subjected to the time constant resistor 40a and its capacitance-variable variable. The horizontal scan timing is adjusted at a relatively low speed by the diode 40b. When the horizontal position adjustment signal is applied to the image processor 26, the image processor 26 hides the left and right portions of the effective screen of the CRT apparatus in the horizontal direction of the image signal displayed on the effective screen of the CRT apparatus. As the playback processing is performed while the horizontal scanning timing is changed at a relatively low speed so that the parts are alternately displayed, the screen forms shown in FIGS. 4A and 4B are changed at a relatively low speed on the effective screen of the CRT apparatus, for example, a drama. The display of the concealed video portion on the left and right sides of the video signal for the broadcast program of the throwing documentary becomes possible.

According to the present invention, the controller 22 controls the horizontal position adjustment of the image portion concealed on the left and right sides of the CRT screen to be alternately performed at a period set by the timer 32, and accordingly the CRT In the effective screen, the display of a wider video signal is performed so that the visual perception of the viewer is remarkably improved.

As described above, according to the apparatus for automatically converting the horizontal position of the CRT screen by the broadcast type recognition according to the present invention, if the viewer recognizes the broadcast type while the automatic adjustment mode of the horizontal position is set, the viewer responds to the broadcast type. Thus, the concealed image portion of the effective screen of the CRT screen can be displayed on the screen while being shifted variably, thereby allowing the viewer to view the concealed image portion without manually adjusting the horizontal position.

Claims (5)

In a television equipped with an IF processor 24 for IF converting a composite video signal from a broadcasting station, and an image processor 26 for reproducing the video IF signal into an R / G / B signal to be displayed on a CRT screen, A remote controller 20 for setting a horizontal position automatic adjustment mode in which a concealed video portion of a video signal displayed on the CRT screen is shifted and displayed in a horizontal direction on a CRT effective screen; A broadcast type recognition unit 28 for recognizing a type of a broadcast program based on the video signal; A control unit 22 for variable position adjustment control of a video signal displayed on a CRT effective screen in a horizontal direction according to the recognized broadcasting type; An automatic mode setting unit 34 in which the horizontal position automatic adjustment mode is set; A positioning speed setting unit 36 in which the horizontal positioning speed of the video signal for the CRT effective screen executed in the horizontal position automatic adjustment mode is set according to the broadcasting type; And a horizontal position adjustment timing setting unit 40 for setting a horizontal position adjustment timing for the video signal of the image processing unit based on the position adjustment speed data applied from the control unit 22 according to the broadcasting type. Horizontal position automatic conversion device of CRT screen by recognition of broadcasting type. The apparatus of claim 1, further comprising a timer (32) for setting a timing signal for changing a horizontal position of a video signal displayed on the CRT effective screen by the controller (22). Horizontal position automatic conversion device of CRT screen. The first and third broadcast ID detection units 28a and 28c according to claim 1, wherein the broadcast type recognition unit 28 detects an ID code for a type of a broadcast program transmitted in a vertical blanking period of the composite video signal. Horizontal position automatic conversion device of the CRT screen by the broadcast type recognition, characterized in that configured to include. The apparatus of claim 1, wherein the broadcast type recognition unit (28) is configured to detect the screen complexity of the composite video signal to recognize the broadcast type. The method of claim 1, wherein the automatic adjustment of the horizontal position of the video signal with respect to the effective CRT screen is performed in one of the following modes: maintenance of the current position, high speed, and low speed according to the broadcast type. Horizontal position automatic conversion device of CRT screen.