KR100397478B1 - Television with contour correction - Google Patents

Abstract

The present invention is a television having an image processing unit and a microcomputer, an A / D converter which converts an analog image signal before being input to the image processing unit into digital data and receives the digital data converted by the A / D converter. Contour detection unit that extracts the contour based on the change of the numerical value by sequentially comparing the memory storing the image signal corresponding to one frame or field with the numerical value representing the color component by receiving the image signals stored in the memory in a row And a contour beam that converts and outputs the remaining portions corresponding to the contours to the color components corresponding to the left and right objects, leaving only the minimum width relative to the center of the contour so that the thickness of the contour output from the contour detection unit is minimized. And the outline output from this outline correction unit is minimized It includes a D / A converter that converts digital image data into an analog signal and outputs it to the image processing unit. The image signal of the received channel is stored, and the contour is extracted using the continuity of the color components of the stored data. By correcting and outputting to the minimum, there is an effect of providing an image of clear image quality.

Description

Television with contour correction function

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television having a contour correction function. In particular, a video signal of a received channel is stored, the contour is extracted by using the continuity of the color components of the stored data, and the contour is corrected so that the thickness of the contour is minimized. A television having an outline correction function for providing an image of image quality.

In general, a television receives and demodulates a broadcast signal transmitted from a broadcasting station and outputs it as a video signal and an audio signal through a CRT and a speaker. A typical television that performs this function is a microcomputer for managing the overall operation of the system, an intermediate frequency processing module for processing video and audio intermediate frequencies (VIF and SIF), and a signal for restoring the received video signal to the original video signal. A video demodulation module and a deflection module for deflecting an image signal are included as components, and each module is separately configured to receive and process broadcast signals.

As shown in FIG. 1, the television as described above includes a key input unit 10, a microcomputer 20, a tuner unit 30, an IF detector 40, a P / S separation unit 50, and a voice processing unit. 60, an audio amplifier 70, an image processor 80, and an image amplifier 90.

The key input unit 10 outputs signals corresponding to various operation modes of the television selected by the user, for example, channel selection and sound output. The microcomputer 20 outputs the tuning voltage corresponding to the signal output from the key input unit 10 to the tuner unit 30 to be described later, and outputs the selected voltage to each part of the television according to the signal output from the key input unit 10. The control signal is output to ensure proper operation.

The tuner 30 tunes and outputs a frequency band corresponding to a control signal input from a broadcast signal input through an antenna. The IF detector 40 detects and outputs an intermediate frequency from the broadcast signal output from the tuner 30. The P / S separator 50 separates and outputs an image signal and an audio signal from the signal output from the IF detector 40.

The voice processing unit 60 converts the voice signal output from the P / S separation unit 50 into a signal that can be output through a speaker by processing the voice signal according to a predetermined processing procedure. The voice amplifier 70 amplifies the voice signal output from the voice processor 60 and outputs it to the speaker.

The image processor 80 converts the image signal output from the P / S separation unit 30 into a signal that can be displayed through a predetermined process and outputs the converted signal. The image amplifier 90 amplifies the image signal output from the image processor 80 and outputs it to the monitor.

In the television configured as described above, the user may select, via the key input unit 10, the strength and output method of the voice output through the speaker. The microcomputer 20 outputs an operation control signal to the voice processing unit 60 based on the signal output from the key input unit 10 so as to select the intensity and output method of the voice output selected by the user, for example, mono or stereo. The voice controlled according to the method, the surround method, and the like is output.

In addition, the image output on the screen through the monitor can be adjusted such as tint, bright, color, and the like. When the user selects a desired screen state through the key input unit 10, the microcomputer 20 outputs a control signal corresponding to the signal output from the key input unit 10 to the image processing unit 80 to match the user's preference. Allow the image to be output to the monitor.

However, the image displayed on the monitor through the above-described process is a double or triple ghost is generated by the ghost generated by the terrain during the transmission of the broadcast signal or the reflection propagation by the transmission path in the big city. Therefore, in order to solve this problem, the conventional television sets the afterimage elimination reference signal superimposed on the vertical retrace period of the broadcast signal, and the receiving side detects the intensity or delay difference from the GCR signal having the afterimage, The ghost is removed by comparison.

Nevertheless, the image displayed on the monitor has a problem in that the objects on the displayed screen are not clear and the image quality is not clear because the contours of the image are dispersed rather than the object itself under the influence of noise or reflected waves.

Accordingly, an object of the present invention for solving the problems of the prior art as described above is to store the image signal of the received channel and extract the contour using the continuity of the color components of the stored data, and then correct the contour to have a minimum thickness. The present invention provides a television having a contour correction function for providing an image with a clear image quality by outputting it.

1 is a block diagram schematically showing a configuration of a general television;

Fig. 2 is a block diagram showing the configuration of a television with contour correction function according to a preferred embodiment of the present invention.

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

10, 10A: key input 20, 20A: microcomputer

30, 30A: Tuner part 40, 40A: IF detector part

50, 50A: P / S separation unit 60, 60A: voice processing unit

70, 70A: voice amplifier 80, 80A: image processor

90, 90A: Image amplifier 100: A / D converter

110 memory 120 contour detection unit

130: contour correction unit 140: D / A converter

A television having a contour correction function of the present invention for achieving the above object comprises a video processing unit for processing a received video signal to be output by a monitor and a microcomputer in charge of overall control of the television. An A / D converter which converts the analog video signal before being input to the processing unit into digital data and outputs the digital data; a memory that receives the digital data converted by the A / D converter and stores the video signal corresponding to one frame or field; And a contour detector for extracting contours based on the change of the numerical values by sequentially receiving numerical values representing the color components by receiving image signals stored in the memory in a row, and having a minimum thickness for the contours output from the contour detector. Minimum width relative to the center of the contour The remaining part corresponding to the contour is left as a contour correction unit for converting and outputting the color components corresponding to the left and right objects, respectively, and converting the digital image data minimized in the contour output from the contour correction unit into an analog signal and converting the image processor. It includes a D / A converter that outputs the data.

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

Hereinafter, a preferred embodiment according to the present invention will be described with reference to the accompanying drawings.

2 shows a television according to a preferred embodiment of the present invention, a key input unit 10A, a microcomputer 20A, a tuner unit 30A, an IF detector 40A, a P / S separation unit 50A, and a voice processing unit 60A. ), Voice amplifier 70A, image processor 80A, image amplifier 90A, A / D converter 100, memory 110, contour detector 120, contour corrector 130 and D / A converter 140 is included.

As described in the related art, the key input unit 10A outputs signals corresponding to various operation modes of the television selected by the user, and the microcomputer 20A outputs signals for controlling the overall operation of the television according to the user's request. do.

The tuner unit 30A tunes and outputs a frequency band corresponding to a control signal input from a broadcast signal input through an antenna, and the IF detector 40A detects an intermediate frequency in the broadcast signal output from the tuner unit. The P / S separator 50A separates the video signal and the audio signal from the signal output from the IF detector and outputs the video signal to an A / D converter which will be described later.

Meanwhile, the A / D converter 100 receives an analog video signal output from the P / S separation unit and converts the analog video signal into digital data for output. The memory 110 receives the digital data converted by the A / D converter and stores an image signal corresponding to one frame or field.

As described above, converting and storing analog signals into digital data requires the continuity of color components to be processed so that the outline of an object is minimized. In order to extract the outlines from successive color components, one frame or field of an image signal is used. This is because the value of the color component must be compared for each pixel.

The contour detection unit 120 receives image signals corresponding to one frame or field stored in the memory in a row and compares the values in sequence to extract contours based on a change in numerical values representing color components.

The contour correction unit 130 leaves only the minimum width relative to the center of the contour so that the thickness of the contour output from the contour detection unit is minimized, and the remaining portions corresponding to the contour are converted into color components corresponding to the left and right objects, respectively. Output

The D / A converter 140 converts the digital image data of the clear image quality having the minimum thickness of the contour in the contour correction unit into an analog signal so that it can be processed in the image processing unit described later.

The image processor 80A processes and outputs an image signal output from the D / A converter according to a predetermined processing process, and the image amplifier 90A amplifies the image signal output from the image processor and outputs the image signal to the monitor. .

Now, the operation of the television with contour correction function according to the present invention will be described in detail.

First, a broadcast signal obtained by synthesizing a video signal and an audio signal is separated from the P / S separation unit through an antenna, a tuner unit, and an IF detector, and processed as a video signal and an audio signal, respectively. At this time, the video signal is subjected to a procedure for removing ghost according to the present invention before being processed by the image processor, the process is as follows.

The video signal is separated from the P / S separation unit and input to the A / D converter in order to undergo a process of converting an analog signal into a digital signal. This is because it is easier to compare the change in numerical value of the digital signal than the analog signal.

The video signal converted into the digital signal is stored in memory based on one frame or field and then goes through the following procedure. That is, when image signals corresponding to one frame or field are stored in the memory, the signals are moved in a line to the contour detection unit, and numerical values representing the color components are sequentially compared to extract contours based on the change in the numerical values.

Thereafter, the image signals passing through the contour detector are converted to color components corresponding to the left and right objects while leaving only the minimum width based on the center of the contour so that the thickness is minimum in the contour correction unit. In this way, the image signal after the contour is corrected is converted into an analog signal and output to the image processor in order to be processed by the image processor. Subsequent processes are the same as the general image processing processes, and thus description thereof is omitted.

As described above, the present invention has been described with reference to preferred embodiments, but the present invention is not limited thereto, and the present invention may be embodied in various forms by adding various limitations or additions without departing from the technical spirit of the present invention. It is apparent to those skilled in the art to which the present invention pertains.

The television having the contour correction function according to the present invention operating as described above converts and stores the image signal of the received channel into digital data and extracts the contour using the continuity of the color components of the stored data. By correcting it to the minimum and converting it into an analog signal and outputting it, it has the effect of providing an image of clear image quality.

Claims (1)

In a television having an image processing unit for processing the received video signal to be output by the monitor and a microcomputer for the overall control of the television, An A / D converter for converting an analog image signal before being input into the image processor into digital data and outputting the digital data; A memory for receiving the digital data converted by the A / D converter and storing an image signal corresponding to one frame or field; An outline detection unit for extracting an outline based on a change in the numerical value by sequentially receiving image signals stored in the memory in a row and comparing numerical values representing the color components; Contour correction unit for leaving only the minimum width relative to the center of the contour to the thickness of the contour output from the contour detection unit to the minimum and the remaining portion corresponding to the contour is converted to the color components corresponding to the left and right objects, respectively; , And a D / A converter for converting the digital image data of which the contour is minimized output from the contour correction unit into an analog signal and outputting the analog signal to the image processing unit.