KR20000007311U - Image border color combination device - Google Patents

Abstract

The present invention relates to a color correction apparatus for a video signal in a television receiver having a video / audio signal processing unit which separates a broadcast signal into a video and audio signal and processes the signal into a signal capable of display and output. Video signal DC level detection unit 101 which receives the video signal output from the audio signal processor and detects the DC level of each image dot and sequentially outputs it, and the signal and delay output from the video signal DC level detection unit 101. A signal difference detector 103 that receives a signal output from the device 102 and detects a DC level difference between the two signals and outputs a difference value; a signal and a threshold reference value output from the signal difference detector 103; The comparison unit 104 outputs a first logic signal when the signal output from the signal difference detection unit 103 is larger than the threshold reference value, and the first signal output from the comparison unit 104. And a color mixing unit 105 for mixing and outputting the screen coloration between the two image dots currently compared during the operation according to a preset setting range. If the image is too different from the surrounding image, the combination of the colors of the interface can be combined and displayed to alleviate the visual fatigue of the viewer.

Description

Image boundary color mixing device

The present invention relates to a color correction method of an image displayed on a television receiver. In particular, when a specific imager is very different from other surrounding images, the color combination of the boundary surface is combined to alleviate the viewer's visual fatigue. A boundary color combination device.

In general, there is a strong trend that recent viewers want to receive a higher level of image quality beyond the step of simply receiving and watching images.

Therefore, product companies producing and selling television receivers in order to provide a higher quality image are making hardware and software efforts to make the image on the screen clearer. In order to meet these demands, the proposed technologies provide flat CRTs and image compensation methods to satisfy the high-level needs of viewers.

However, the following problems have arisen in applying the image compensation method to the proposed television receiver. According to the problem, a typical technique is a conventional image compensation method using an image processor using a signal processing technique. This is the way to emphasize the boundary of.

The technologies proposed for this purpose include the technology for detecting the boundary of an image (Korean Patent Publication No. 90-20246, Korean Patent Publication No. 85-1849) and a technique for clarifying screen color. Among the remaining display images, if the specific imager is very different from other surrounding images, the interface is emphasized, and the viewer is visually tired.

An object of the present invention for solving the problems of the prior art as described above is to combine the color of the boundary when the image and the color of the surrounding image is very different from the other surrounding image image combination to reduce the visual fatigue It is to provide a combination device.

1 is a block diagram of a typical television receiver

2 is an exemplary configuration diagram of an image boundary color combination device according to the present invention.

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

10: key input unit 20: microcomputer

30: tuner 40: video / audio signal processing unit

50: OSD 60: Monitor

70: speaker 80: ATS code decoder

90 memory 101, video signal DC level detection unit

Delay element 103 Signal difference detection unit

104: comparison unit 105: color mixing unit

Another feature of the present invention for achieving the above object is that the video signal of the television receiver having a video / audio signal processing unit that separates the broadcast signal into a video and audio signal and displays and outputs a signal capable of display and output, respectively A color correction apparatus comprising: an image signal DC level detector for receiving a video signal output from the video / audio signal processor and detecting a DC level of each image dot and sequentially outputting the same; A delay element for receiving a signal to be delayed and outputting a time corresponding to an image dot interval of one video signal, and receiving the signal output from the video signal DC level detection unit and the signal output from the delay element. A signal difference detector for detecting a DC level difference and outputting a difference value, and a signal output from the signal difference detector And a threshold reference value and a comparison unit for outputting a high signal when the signal output from the signal difference detection unit is greater than the threshold reference value, and the two signals operated by the high signal output from the comparison unit and are currently compared And a color mixing unit which mixes and outputs the screen color distribution between the image dots little by little according to a preset setting range.

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

1 is a schematic diagram illustrating a configuration of a television receiver to which the present invention is applied, and includes a key input unit 10, a microcomputer 20, a tuner unit 30, a video / audio signal processing unit 40, and an OSD unit 50. ), A monitor 60, a speaker 70, an ATS code decoder 80, and a memory 90.

In this configuration, the key input unit 10 is provided with a plurality of keys for generating a user request signal for controlling the operation of the television receiver, and outputs a key signal corresponding to the user's key operation, the input is typically remote A key signal carried on a predetermined infrared carrier wave is transmitted / received using a remote controller, and applied to a microcomputer 20 to be described later.

Then, the microcomputer 20 is driven based on the constant power supply based on the data provided from the memory 80 to be described later, and the tuner unit 30 and the video / audio signal processor based on the key signal from the key input unit 10. Selectively controlling the 40 and the OSD unit 50 to control the overall operation of the television. When a key signal according to the automatic tuning request is applied from the key input unit 10, a broadcast channel for the entire broadcasting frequency is based on the ATS method. Tune to and receive the broadcaster name corresponding to the broadcast channel currently being tuned from the ATS code decoder unit 80 to control and display the OSD unit 50.

Meanwhile, the tuner unit 30 outputs a broadcast signal received by being tuned to a corresponding channel corresponding to the control of the microcomputer 20.

In addition, the video / audio signal processing unit 40 separates the broadcast signal applied from the tuner unit 30 into a video and audio signal under the control of the microcomputer 20 and processes the video signal into a signal capable of display and output, respectively. Are output to the OSD unit 50, and audio signals to the speaker 70, respectively.

In addition, the OSD (On Screen Display) unit 50 is a device for processing text on a television screen, and reads a text signal corresponding to the control of the microcomputer 20 to display the video / audio signal to be displayed at a predetermined screen position The synthesizer outputs a video signal or a blue-back signal (the background color can be set to a color other than blue) applied from the processing unit 40.

In addition, the ATS code decoder 80 is an ATS code inserted into a predetermined position within the vertical blanking period of the broadcast signal received from the tuner 30 under the control of the microcomputer 20, that is, the broadcast program related information. Read it and apply it to the microcomputer 20.

Lastly, the memory 90 stores various data according to the operation of the television receiver, and stores information of the tuned channel (for example, program number, broadcasting frequency, broadcasting station name, ...).

In this case, in order to apply the image boundary color combination method according to the present invention in the television receiver configured as described above, the configuration as shown in FIG. 2 is additionally required. Image signal DC level detection unit 101 for receiving the video signal output from the signal processing unit 40 detects the DC level of each image dot and sequentially outputs the output signal from the image signal DC level detection unit 101 A delay element 102 for receiving a signal and delaying a time corresponding to an image dot interval of one image signal, and outputting the signal output from the image signal DC level detection unit 101 and the delay element 102. A signal difference detector 103 for detecting a DC level difference between the two signals and outputting a difference value, a signal output from the signal difference detector 103, and a threshold reference value In comparison, when the signal output from the signal difference detecting unit 103 is larger than the threshold reference value, the comparator 104 outputs a high signal, and the high signal output from the comparator 104 is operated. It consists of a color mixing unit 105 for outputting a mixture of the screen color between the two image dots that are currently compared little by little according to a preset setting range.

Looking at the preferred operation example according to the present invention configured as described above, in the video / audio signal processing unit 40 of Figure 1 attached to the video signal from the tuner unit 30 under the control of the microcomputer 20 video And outputting a video signal and an audio signal by separating the audio signal into a signal capable of display and output.

In this case, the video signal output from the video / audio signal processor 40 is input to the DC level detector 101. The DC level detector 101 provides information on each color signal of the video signal serially input. It receives the input and detects the DC level of each image dot and outputs it sequentially.

The signal output from the image signal DC level detecting unit 101 is input to the delay element 102 and the signal difference detecting unit 103. In the delay element 102, the image signal DC level detecting unit 101 The output signal is delayed and output as a video dot interval of one video signal.

Accordingly, the signal difference detector 103 is inputted with the current video signal and the previous video signal, that is, the DC level of two adjacent pixels, and detects and outputs a difference between the DC level states of the two received pixels.

Since the signal output from the signal difference detector 103 is a DC level difference between two adjacent pixels, the comparator 104 sets a predetermined threshold reference value and the DC level difference value of two adjacent pixels output from the signal difference detector 103. For comparison, when the signal output from the signal difference detector 103 is larger than a preset threshold reference value, the first logic signal, that is, a high signal is output.

Therefore, the color mixing unit 105 is enabled by the high signal output from the comparator 104 and mixes the screen color scheme between the two image dots currently compared at the time of operation according to a preset setting range. Will print.

The output of the color mixing unit 105 is input to the OSD unit 80 of FIG. 1, and accordingly, the boundary between the other image and the color of the other surroundings, which is sensitive to the viewer's vision, is so smoothly smooth. It is changed and displayed.

By providing an image boundary color combination device according to the present invention that operates as described above, if a particular imager is completely different from other surrounding images, the color combination of the boundary surface is displayed and then displayed to reduce the fatigue of the viewer's feelings. I can let you.

Although the present invention has been shown and described with respect to specific embodiments, those skilled in the art will appreciate that various modifications and changes can be made without departing from the spirit and scope of the invention as indicated by the claims. Anyone can see it easily.

Claims (1)

In the color correction apparatus of the video signal in a television receiver having a video / audio signal processing unit for separating the broadcast signal into a video and audio signal and display and output each signal and output, A video signal DC level detector 101 which receives the video signal output from the video / audio signal processor and detects the DC level of each video dot and sequentially outputs the detected DC level; A delay element (102) for receiving a signal output from the video signal DC level detection unit (101) and delaying and outputting a time corresponding to an image dot interval of one video signal; The signal difference detector 103 which receives a signal output from the image signal DC level detector 101 and a signal output from the delay element 102, detects a DC level difference between the two signals, and outputs a difference value. Wow; A comparison unit 104 for comparing a signal output from the signal difference detection unit 103 with a threshold reference value and outputting a high signal when the signal output from the signal difference detection unit 103 is larger than a threshold reference value; And It consists of a color mixing unit 105 which operates by the high signal output from the comparing unit 104 and mixes the screen color scheme between the two image dots which are currently compared during the operation according to a predetermined setting range. And an image boundary color combination device.