KR0123244Y1 - Circuit for a kbps - Google Patents

Abstract

The present invention relates to an on-screen display (OSD) circuit of KBPS, and more particularly, to an on-screen circuit of KBPS that removes noise generated when outputting the contents of the KBPS OSD to a screen. It is about.

To this end, the present invention, the tuner 100, the registered signal separation unit 110, K. B. PS detection unit 120, the decoder 130, the control unit 150, O.S. D unit 160, In the K.S.P.S.D. circuit of the K.P.S., which is constituted by the first switching unit 170, the K.P.S.detector 120 detects when the K.P.S.P. data is detected. A color killer unit 300 configured to output a switching signal and to remove a color signal component from an input image signal; By further comprising a second switching unit 200 which is switched according to the switching signal and applies the input image signal or the video signal of the color killer unit 300 to the KBPS detection unit 120 and the first switching unit 170, It removes the noise that occurs when the KBS's O.D. output is used to maintain clean image quality.

Description

KBS's (OSD) Circuit

1 is a block diagram showing the structure of a conventional K.P.S.D. circuit.

2 is a block diagram showing the configuration of the K.S.D circuit of K.P.S.P according to the present invention.

* Explanation of symbols for main parts of the drawings

100: first switching unit 110: synchronization signal separation unit

120: K. B. PS detection unit 130: decoder

140: key input unit 150: control unit

160: O.S. d 170: second switching unit

200: third switching unit 300: color killer unit

The present invention relates to an on screen display (OSD) circuit of KBPS, and more particularly, to remove noise generated when outputting KBPS contents or OSD contents to a screen. It is about the S.D. circuit.

Generally, KBPS is an abbreviation of Korea Broadcasting Program System. It converts program reservation recording data into a digital signal on a television signal and inserts it into any one line of the vertical vertical blanking interval to transmit the signal. It is demodulated by KBPS of side and says Korean-style TV reservation recording method which performs functions such as broadcast program reservation recording and automatic time setting.

Types of data transmitted in the KBPS include broadcasting station standard time information, daily program information, information for updating in the case of continuous programs, and information for a case in which cancellation / change is preceded by one, and the main functions executed using such data. Examples include accurate scheduled recording execution, reserved recording data preservation function after power failure, automatic time setting function, continuous program recording function, program detailed guide information providing function, broadcasting program classification function, and scheduled recording confirmation function.

Therefore, in the case of a video cassette recorder (hereinafter referred to as VCS) that performs scheduled recording using KBPS, a code unique to each program is used even when a program is changed due to a broadcasting station unlike a conventional method. Since the code data comes in without the user needing to change the time, there is an advantage that only the program can be recorded.

However, when outputting the KBPS content or the OS content to the screen, noise occurs on the screen where the KBPS content or the OS content appears due to line interference, and thus the image quality is deteriorated.

FIG. 1 is a block diagram showing the structure of the conventional S.S.D circuit of KBPS. The first switching unit 100, the synchronization signal separation unit 110, the KBPS detection unit 120, the decoder 130, and the key input unit are shown in FIG. 140, the controller 150, the OSD unit 160, and the second switching unit 170.

The first switching unit 100 outputs an image signal of a luminance signal / color signal passed through a video module and a video signal output from a tuner (not shown) that selects and outputs a high frequency broadcast signal received through an antenna as a desired channel. Optionally configured to output to the synchronization signal separation unit 110 and the second switching unit 170 to be described later.

The synchronization signal separating unit 110 is configured to separate the synchronization signal from the image signal switched and output by the first switching unit 100 and output the output to the KBPS detection unit 120 and the decoder 130 which will be described later to synchronize the OSD. .

That is, the KBPS detection unit 120 detects KBPS data from the synchronization signal output from the synchronization signal separation unit 110 and outputs the KBPS data to the decoder 130, and the decoder 130 outputs the KBPS data input signal output from the control unit 150. In addition, the enable is configured to decode the KBPS data detected by the KBPS detection unit 130 according to the signal and the clock, and output a predetermined image signal to the OS.

At this time, the controller 150 is easily driven by those skilled in the art that a predetermined key signal output from the key input unit 140, a key signal for selecting a KBPS or OSD function is driven. There will be.

The O.S.D. 160 mixes the O.S.D character data with the decoded predetermined image signal output from the decoder 130 under the control of the controller 150 and outputs the O.S.D character data to the first switching unit 170. It is configured to.

Therefore, the second switching unit 170 is configured to switch the image signal output from the tuner 100 and the O.S.D signal output from the O.S.D unit 160 as described above to output to the monitor. Therefore, there is a problem in that image quality is deteriorated due to noise generated on the screen showing KBPS contents or O.S.D contents due to line interference caused by color signal components of an image signal during output.

The present invention has been made to solve the above problems, and the object of the present invention is to improve the image quality by removing the color signal components of the video signal when outputting the KBPS content or O.S. content on the screen. To provide an S.D. circuit.

A feature of the present invention for achieving the above object is a first switch, a synchronous signal separation unit, K. B. PS detection unit, a decoder, a control unit, O. DS unit, K is composed of a second switching unit. In the B.S.D. circuit of the B.P.S., the K.P.S.detector is configured to output a switching signal when the K.P.S.data is detected, and in the first switching unit, A color killer unit which removes a color signal component from the switched image signal; And a third switching unit configured to switch according to the switch signal to apply an image signal output from the first switching unit or a signal of the color killer unit to the KBPS detection unit and the second switching unit.

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

2 is a block diagram showing the configuration of the O.S.D circuit of the KBPS according to the present invention, the first switching unit 100, the synchronization signal separation unit 110 performing the same function as shown in FIG. , KBPS detection unit 120, decoder 130, key input unit 140, control unit 150, OSD unit 160, the second switching unit 170 and the third switching unit 200, color killer unit 300 It is configured to further include.

When the switching signal is input from the KBPS detection unit 120 configured to output the switching signal when the KBPS data is detected, the third switching unit 200 is switched to the image signal that is switched and output by the first switching unit 100 according to the switching signal; The image signal from which the color signal component outputted from the killer unit 300 to be described later is selectively output to the second switching unit 170 and the KBPS detection unit 200.

At this time, the color killer unit 300 is configured to remove the color signal component of the image signal output from the first switching unit 100 and output to the third switching unit 200 as described above.

That is, the third switching unit 200 outputs the image signal from which the color signal component is removed to the second switching unit 170, and the second switching unit 170 outputs the color signal component output from the third switching unit 200. It is configured to switch the removed video signal and the O.S.D signal output from the O.S.D unit 160 to output to the monitor.

As described above, the circuit of the present invention is switched according to the switching signal output from the KBPS detection unit, and the image signal and the color signal component output from the color killer unit are removed. By switching the S.D signal and outputting it to the monitor, the noise generated when the S.D. output of KBPS is removed can maintain the clean picture quality.

While the present invention has been shown and described with respect to certain preferred embodiments, those skilled in the art will recognize that various modifications and changes may occur without departing from the spirit and scope of the present invention as set forth in the following claims.

Claims (2)

The first switching unit 100, the synchronization signal separation unit 110, K.P. S. detection unit 120, the decoder 130, the control unit 150, O.S. D unit 160, the second switching In the K.S.P.S.D. circuit of the K.P.S., which is composed of the unit 170, the K.P.S.detector 120 switches the switching signal when the K.P.S.data is detected. A color killer unit 300 configured to output a color and removing color signal components from an image signal switched and output by the first switching unit 100; Switched according to the switching signal to apply the image signal output from the first switching unit 100 or the image signal of the color killer unit 300 to the KBPS detection unit 120 and the second switching unit 170 The K.S.D circuit of K.P.S. further comprising a third switching unit 200. According to claim 1, wherein the third switching unit 200 is switched by the second switching unit outputs the image signal to the KBPS detection unit 120, the signal of the color killer unit 300 is the second switching The K.S.D circuit of K.P.S., characterized in that it is configured to be selectively applied to the unit 170.