KR20000010257A - Display control device of a television - Google Patents

Abstract

PURPOSE: A device for display control of a television is provided to maximize the using effect of the wide monitor by displaying the mixing the user image with the ordinary image when displaying the general broadcasting image. CONSTITUTION: The device of a TV comprises a memory block(114) in which the user image is stored; a detecting measurement which detects the motive at the tuned analog broadcasting signal; a control measurement in which the mode determining signal corresponding to the determining result occurs and which determines whether the tuned analog signal is wide broadcasting image or general broadcasting image; signal managing measurement which transfers the tuned analog broadcasting signal into digital signal and manages it to signal which is displayable; a counter(110) which counts the number of pixels per line when transferring into the digital signal; a sampling measurement (116) which samples the user image and reduces the size; a measurement which forms wide digital mixed image by mixing the user image and D/A transferring measurement (120) in which the wide digital mixed image is transferred into the digital signal and provided to the wide monitor.

Description

Display control unit of wide TV

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to wide televisions, and more particularly to a display control apparatus for wide televisions suitable for effectively displaying broadcast video signals having different signal formats on a monitor in wide televisions having a wide aspect ratio.

As is well known, a television receives a broadcast signal transmitted from a transmitting side (i.e., a broadcasting station) through an internal antenna mounted on its own or an external antenna installed outdoors to display a broadcast image of a specific channel selected by a user on a monitor. In this case, as a broadcast video used at this time, a signal having a video size of 4: 3 is usually used, and a television monitor also employs a monitor having an aspect ratio of 4: 3, which corresponds to the size of the received video. have.

Recently, various technology broadcasting methods (eg, HDTV, satellite broadcasting, etc.) have been developed everywhere to perform some services. In this new broadcasting method, unlike the conventional method described above, a higher level of image quality is achieved. Adoption of a broadcast video having a 16: 9 size has been actively considered, and in order to cope with this, widespread television having a 16: 9 aspect ratio has been gradually expanded.

Therefore, given the transitional current situation in which ordinary television and wide television must coexist, broadcast signals having a wide size (16: 9) can be received and processed on a general television, and also general size in a wide television. It must be compatible to receive and process broadcast signals with (4: 3). Herein, the present invention relates to an improvement of a technique for adaptively processing a broadcast image of a general size or a broadcast image of a wide size in a wide television.

On the other hand, in the conventional method of displaying a broadcast image having a general size (4: 3) on a wide screen television on a monitor having a wide aspect ratio (16: 9), a method of expanding and displaying a general size image and a wide size monitor as it is There is a way to display on.

In this case, in the first method, the broadcast image of the received general size is extended and displayed to fit the wide size by using a technique such as interporation. There is a problem that the sense of reality or reality is reduced because it is displayed in a form that seems to extend in the horizontal direction as a whole.

In addition, in the second method, a normal size image is displayed as it is on a wide monitor, which is a black screen section (that is, a screen margin section) in which there is no image on the left, right, or left and right sides of the wide monitor. There is a problem that an undesirable phenomenon that is formed (that is, decrease in utilization efficiency of a wide screen, rejection of viewing, etc.) is caused.

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and an object of the present invention is to provide a display control apparatus for a wide television capable of effectively processing a screen margin section formed when a wide-screen television is displayed without deformation in a general size broadcast image. There is this.

In order to achieve the above object, the present invention provides a device for controlling an adaptive display of a general broadcast video having a 4: 3 size and a wide broadcast video having a 16: 9 size in a widescreen television having a 16: 9 wide monitor. A memory block, comprising: a memory block for storing a user image provided through an external video terminal of the wide television; Means for detecting synchronization in the tuned analog broadcast signal when the broadcast signal of the selected specific channel is tuned; Control means for determining whether the tuned analog broadcast signal is a wide broadcast video or a general broadcast video based on the detected synchronization signal, and generating a mode discrimination signal corresponding to the determination result; Signal processing means for converting the tuned analog broadcast signal into a digital signal and processing the signal as a displayable signal; A counter for counting the number of pixels per line when converting to the digital signal; Sampling means for sampling the user image drawn from the memory block at a sampling rate determined based on a counter value from the counter and reducing its size when the tuned broadcast signal is a general broadcast video; On the basis of the mode switching signal generated when the tuned broadcast signal is a general broadcast video and a counter value from the counter, the general broadcast video provided from the signal processing means and the reduced user video provided from the sampling means Synthesizing means to generate a wide-size digital mixed image; And a D / A conversion means for converting the generated wide sized digital mixed image into an analog signal and providing the wide width monitor to the wide width monitor.

1 is a block diagram of a display control apparatus for a wide television according to a preferred embodiment of the present invention;

2 is a flowchart illustrating a process of adaptively performing a display according to the size of a broadcast video received by a wide television according to the present invention;

FIG. 3 is a diagram showing an example of a 4: 3 broadcast image displayed on a monitor of a wide television having a 16: 9 aspect ratio and a mixed image obtained by synthesizing two previously stored images;

4 is a diagram showing an example of a mixed image obtained by synthesizing a 4: 3 size broadcast image displayed on a monitor of a widescreen television having an aspect ratio of 9 and an image of prestored character information;

<Description of the code | symbol about the principal part of drawing>

102: tuner block 104: sync detection block

106: control block 108: A / D conversion block

110: counter 112: video processing block

114: memory block 116: sampling block

118: video synthesis block 120: D / A conversion block

The above and other objects and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention described below with reference to the accompanying drawings by those skilled in the art.

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

Fig. 1 shows a block diagram of a display control apparatus for a wide television according to a preferred embodiment of the present invention.

As shown in the figure, the display control apparatus of the present invention includes a tuner block 102, a sync detection block 104, a control block 106, an A / D conversion block 108, a counter 110, and video processing. Block 112, memory block 114, sampling block 116, image synthesis block 118, and D / A conversion block 120.

Referring to FIG. 1, the tuner block 102 tunes a broadcast channel selected by a user in a broadcast signal received through a reception antenna, not shown, based on a tuning control signal for tuning the selected broadcast channel. The broadcast channel signal is demodulated into the original signal before transmission, and the demodulated broadcast signal is provided to the sync detection block 104 and the A / D conversion block 108 through the line L11.

In addition, the sync detection block 104 detects a sync signal, i.e., a horizontal sync signal, from the received broadcast signal on the line L11, and the detected horizontal sync signal is provided to the next control block 106.

Meanwhile, the A / D conversion block 108 samples the tuned analog broadcast signal input through the line L11 at a predetermined sampling rate, converts the digital analog data into digital image data, and provides the same to the video processing block 112.

In addition, the video processing block 112 performs a predetermined signal processing on a broadcast video (a wide video or a general video) converted into a digital signal, for example, various signal processing such as level amplification, noise reduction, gain control, and the like. When the inputted broadcast image is a general broadcast image (that is, 4: 3 image) through L12 and based on the count value provided from the counter 110 described later through line L13, the input image is provided to the image synthesis block 118 through L12. The synchronization is extended, that is, the horizontal synchronization area of the general image is expanded to correspond to the wide aspect ratio.

Next, the counter 110 counts the number of pixels of each line in the broadcast video signal which is converted into a digital signal, where the count value is provided to the control block 106 and at the same time the video processing block through the line L13. 112 and image composition block 118, respectively.

On the other hand, the control block 106 performs a general operation control of the wide television, for example, including a microprocessor, and is based on the detected synchronization signal provided from the synchronization detection block 104 described above. The image mode is determined, that is, whether the currently received broadcast image is a wide image having a wide size of 16: 9 or a general image having a general size of 4: 3.

Further, the control block 106 generates a mode switching signal corresponding to the broadcast video mode (that is, the wide video mode or the normal video mode) determined on the basis of the detected synchronization signal on the line L14, to be described later. Block 118, and when the current broadcast image is in the wide image mode, the user image data pre-stored in the memory block 114 is extracted and provided to the sampling block 116, and the count value from the counter 110 is also applied. On the basis of this, the sampling ratio of the image data extracted from the memory block 114 is determined.

At this time, as a mode switching signal generated on the line L14, for example, a logic signal having a high or low level can be used, and when the logic is at the low level, the wide image mode is used. You will be able to set the mode.

In addition, the memory block 114 includes digital user image data input through an external video input terminal (not shown) of a wide television, for example, at least two user wedding images, a character image containing a demon or lesson, and a language. Data such as specific character images (e.g., Chinese characters, Japanese, English, etc.) for education are stored. Such user image data is stored on the left side of the wide monitor when displaying a general image on the wide monitor according to the present invention. The image is displayed on a screen margin section where no image formed on the right or left and right sides exists.

On the other hand, in the sampling block 116, the user image (e.g., image data, character image data, etc.) provided from the control block 106 in the normal image mode is oriented in the horizontal and vertical directions (i.e., between the line pixels and the angle). Sampling each other to generate a reduced user image, wherein the reduced user image data generated is provided to the image composition block 118 through a line L15.

On the other hand, the image synthesizing block 118 outputs the wide image on the line L12 to the D / A conversion block 120 in response to the mode switching signal provided from the control block 106 via the line L14 or the general on the line L12. The mixed image obtained by combining the image and the reduced user image on the line L15 is output to the D / A conversion block 120.

That is, the image synthesizing block 118 outputs the wide image signal provided at the line L12 to the D / A conversion block 120 as it is, when the mode switching signal on the line L14 is at the low level, and the mode switching signal on the line L14 is output. At the high level, a mixed image obtained by synthesizing the general video signal on the line L12 and the reduced user video signal on the line L15 based on the count value provided through the line L13 is output to the D / A conversion block 120.

In this case, the mixed image output from the image synthesizing block 118 is a mixed image comprising two reduced user images displayed on the screen margin section of the wide channel and the general image of the tuned channel as shown in FIG. 3 as an example. As an example, as shown in FIG. 4, the image may be a composite image obtained by synthesizing a general image and one character image displayed in the screen margin section of the wide monitor.

Next, the D / A conversion block 120 converts the digital wide image or the digital mixed image provided from the image synthesis block 118 into an analog signal. It is provided to the display side not shown.

In this case, the purpose of the present invention is to convert analog broadcast signals into digital signals and perform signal processing in order to improve the quality of the reproduced video by taking advantage of the fact that digital processing is stronger in noise components than analog processing.

Therefore, in the wide monitor on the display side, not shown, a mixed image obtained by combining a wide image or a user image will be displayed.

That is, as an example, assuming that the user has previously stored two wedding anniversary image data in the memory block 114, and when the currently received broadcast image is a general broadcast image having a 4: 3 size, on the wide monitor, FIG. As shown in FIG. 6, a mixed video obtained by combining the general broadcast video of the selected channel and two user videos will be displayed. In FIG. 3, reference numeral A denotes a wide screen, a denotes a general broadcast image region, b1 and b2 denote respective user image regions, and b3 denotes a division section for distinguishing user images.

In addition, as an example, assuming that the user has pre-stored image data in gargoyle, didactic or educational language characters in the memory block 114, when the currently received broadcast image is a general broadcast image having a size of 4: 3, On the monitor, as shown in FIG. 4, a mixed image in which the general broadcast image of the selected channel and one user text image are synthesized will be displayed. In FIG. 4, reference numeral A denotes a wide screen, a denotes a general broadcast video region, and b denotes a user text image region.

Next, a process of adaptively performing the display according to the size of the broadcast image received by the wide television using the display control device according to the present invention having the above-described configuration will be mainly described with reference to FIG. 2. do.

2 is a flowchart illustrating a process of adaptively performing a display according to the size of a broadcast video received by a wide television according to the present invention.

Referring to FIG. 2, first, a user image (eg, a wedding anniversary image) captured by a user using a camcorder or the like is stored in the memory block 114 or scanned by a scanner. With a text image of educational text or the like stored in the memory block 114 (step 202), when the power of the wide television is turned on, the tuner block 102 automatically selects a specific channel, for example, a channel previously watched. Tune (step 204).

Next, when a specific channel is tuned, synchronization is detected in the broadcast signal of the tuned channel (step 206), and based on the detected synchronization signal, the broadcast signal is a wide image having a size of 16: 9 and 4: 3. It is checked whether or not it is a normal video having a size of (step 208).

As a result of the check in step 208, if it is determined that the currently tuned broadcast signal is a wide image, the wide television displays a wide image of the tuned channel on the wide monitor through normal image processing. That is, by converting the tuned broadcast signal into a digital signal, for example, performing various signal processing such as level amplification, noise reduction, gain control (step 210), and converting it into an analog signal again (step 212), Display on a wide monitor (step 222).

On the other hand, if it is determined in step 208 that the currently tuned broadcast signal is not a wide image but a general image (4: 3 size image), the control block 106 of FIG. 1 corresponds to the corresponding mode. A switching signal is generated on the line L14, in which the A / D conversion block 108 and the video processing block 118 convert the tuned general video signal into a digital signal and count the number of pixels per line counted in A / D conversion. Based on the information, signal processing such as expansion of synchronization, that is, expansion of a horizontal synchronization region of the general video so as to correspond to the wide aspect ratio is performed (step 214).

At this time, the digital user video signal drawn out from the memory block 114 under the control of the control block 106 is determined based on the number of pixels per line counted during A / D conversion of the tuned general video. The size is reduced by sampling at a ratio (step 216).

Next, in step 218, a mixed image is generated by synthesizing the signal-processed general image and the reduced user image based on the pixel number per line information counted during A / D conversion of the tuned general image (step S218). 218), the digital mixed image thus generated is converted into an analog signal again (step 220) and then displayed on the wide monitor on the display side (step 222).

Therefore, on the wide monitor on the display side, as shown in Figs. 3 and 4 as an example, a mixed image in which a normal image and a user image are synthesized will be displayed.

As described above, according to the present invention, when displaying a general broadcast image having a 4: 3 size in a television having a wide monitor, the user image of a normal image and a still image or a text image is mixed and displayed. While suppressing the loss of realism of the image, it is possible to maximize the use efficiency of the wide monitor, and also to reduce the viewer's rejection of the viewer as well as to achieve the educational effect.

Claims (3)

An apparatus for controlling an adaptive display of a general broadcast video having a size of 4: 3 and a wide broadcast video having a size of 16: 9 in a widescreen television having a 16: 9 wide monitor. A memory block for storing a user image provided through an external video terminal of the wide television; Means for detecting synchronization in the tuned analog broadcast signal when the broadcast signal of the selected specific channel is tuned; Control means for determining whether the tuned analog broadcast signal is a wide broadcast video or a general broadcast video based on the detected synchronization signal, and generating a mode discrimination signal corresponding to the determination result; Signal processing means for converting the tuned analog broadcast signal into a digital signal and processing the signal as a displayable signal; A counter for counting the number of pixels per line when converting to the digital signal; Sampling means for sampling the user image drawn from the memory block at a sampling rate determined based on a counter value from the counter and reducing its size when the tuned broadcast signal is a general broadcast video; On the basis of the mode switching signal generated when the tuned broadcast signal is a general broadcast video and a counter value from the counter, the general broadcast video provided from the signal processing means and the reduced user video provided from the sampling means Synthesizing means to generate a wide-size digital mixed image; And And a D / A converting means for converting the generated wide-size digital mixed image into an analog signal and providing the converted wideband image to an analog signal. The apparatus of claim 1, wherein the user image is two user still images each having a size of 4: 3 reduced in the vertical and horizontal directions through the sampling. The wide television set according to claim 1 or 2, wherein the user image is synthesized with the general broadcast image such that the user image is displayed in a screen margin section except for an area occupied by the tuned general broadcast image. Display control unit.