KR900006268B1 - Display method of tv - Google Patents

Display method of tv Download PDF

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Publication number
KR900006268B1
KR900006268B1 KR1019870007657A KR870007657A KR900006268B1 KR 900006268 B1 KR900006268 B1 KR 900006268B1 KR 1019870007657 A KR1019870007657 A KR 1019870007657A KR 870007657 A KR870007657 A KR 870007657A KR 900006268 B1 KR900006268 B1 KR 900006268B1
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KR
South Korea
Prior art keywords
signal
output unit
character
output
display
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KR1019870007657A
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Korean (ko)
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KR890003220A (en
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류상원
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주식회사 금성사
최근선
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Priority to KR1019870007657A priority Critical patent/KR900006268B1/en
Priority to US07/211,898 priority patent/US5033085A/en
Priority to CA000570652A priority patent/CA1321016C/en
Priority to BR8803209A priority patent/BR8803209A/en
Priority to GB8815523A priority patent/GB2206759B/en
Priority to DE3822062A priority patent/DE3822062A1/en
Priority to IT21183/88A priority patent/IT1217983B/en
Priority to FR8808834A priority patent/FR2617658B1/en
Priority to JP63161117A priority patent/JP2723542B2/en
Publication of KR890003220A publication Critical patent/KR890003220A/en
Application granted granted Critical
Publication of KR900006268B1 publication Critical patent/KR900006268B1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/234—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
    • H04N21/2347—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving video stream encryption
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/167—Systems rendering the television signal unintelligible and subsequently intelligible

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Controls And Circuits For Display Device (AREA)
  • Television Systems (AREA)

Abstract

The method for displaying figures corresponding to password inputs on a television screen comprises (a) generating the image erase signal with an onscreen character output section (1) when password is set (b) selecting the output of the onscreen character output section by a switching section (3), (c) reading the password data by the onscreen character output section, (d) providing and image output section (4) with the character displaying signal indicating the password setting, and (e) sequentially providing the image output section with the colour signal according to each key input.

Description

텔레비젼 수상기의 화면 표시방법Screen display method of TV receiver

제1도는 종래 텔레비젼 수상기의 화면표시부 희로도.1 is a screen display part of a conventional television receiver.

제2도는 본 발명 텔레비젼 수상기의 화면표시부 희로도.2 is a diagram showing a screen display of the television receiver of the present invention.

제3도는 본 발명의 표시방법에 의한 문자표시 제어흐름도.3 is a character display control flow chart according to the display method of the present invention.

제4도는 본 발명에 의해 온스크린문자포시신호의 표시과정을 보인 예시도.4 is an exemplary view showing a display process of an on-screen character display signal according to the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 화면표시문자출력부 2 : 티브이신호출력부1: Screen display character output unit 2: TV signal output unit

3 : 스위칭부 4 : 영상출력부3: switching unit 4: image output unit

S/V : 스위칭신호출력단자 P/W : 영상소거출력단자S / V: Switching signal output terminal P / W: Video mute output terminal

OR1 : 오아게이트OR1: Oagate

본 발명은 암호를 설정할 수 있는 텔레비젼 수상기의 암호장치에 관한 것으로, 특히 암호키신호입력시에 그 키신호입력의 응답상태가 표시되게 한 텔레비젼 수상기의 화면 표시방법에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an encryption apparatus for a television receiver capable of setting an encryption, and more particularly, to a screen display method for a television receiver in which a response state of the key signal input is displayed when an encryption key signal is input.

종래 텔레비젼 수상기의 화면 표시장치는 제1도에 도시된 바와같이, 온스크린문자표시신호 및 스위칭신호를 출력하는화면표시문자출력부(1)와, 티브이색신호를 출력하는티브이신흐출력부(2)와, 상기화면표시문자출력부(1)의 스위칭신호에 따라 상기 티브이신호츌력부(2)의 티브이색신호 또는 상기 화면표시문자출력부(1)의 온스크린 문자표시신호를 선택하여 영상출력부(4)에 인가하는 스위칭부(3)로 구성되어 있다.As shown in FIG. 1, a screen display apparatus of a conventional television receiver has a screen display character output unit 1 for outputting an on-screen character display signal and a switching signal, and an active synth output unit 2 for outputting a TV color signal. And a TV color signal of the TV signal output unit 2 or an on-screen character display signal of the screen display character output unit 1 according to the switching signal of the screen display character output unit 1 and an image output unit. It consists of the switching part 3 applied to (4).

따라서, 화면표시문자출력부(1)의 스위칭신호출력단자(S/W)에 고전위의 스위칭신호가 출력되는 상태에서는 화면표시문자출력부(1)의 출력단자(r,g,b)에서 출력되는 온스크린문자표시신호가 스위칭부(3)에서 선택되어 영상출력부(4)에 인가되고, 화면표시문자출력부(1)의 스위 칭신호출력단자(S/W)에 저전위의 스위칭신호가 출력되는 상태에서는 티브이신호출력부(2)의 출력만자(R,G,B)에 출력되는 영상신호가 스위칭부(3)에서 선택되어 영상출력부(4)에 인가된다.Therefore, in a state where a high potential switching signal is output to the switching signal output terminal S / W of the screen display character output unit 1, the output terminals r, g and b of the screen display character output unit 1 are output. The output on-screen character display signal is selected by the switching unit 3 and applied to the image output unit 4, and switching of the low potential to the switching signal output terminal S / W of the screen display character output unit 1 is performed. In the state that the signal is output, the video signal output to the output only (R, G, B) of the TV signal output unit 2 is selected by the switching unit 3 is applied to the image output unit (4).

그러나, 이러한 종래의 장치에 있어서는 암호키신호를 입력시킬 경우에 그 응답상태를 표시하여 줄 수 있는 장치가 마련되어 있지 않으므로 사용자가 암호키 입력시에 소정횟수를 정확히 입력시켰는가를 확인할 수 없는 결점이 있었다.However, in such a conventional apparatus, when a cryptographic key signal is input, there is no device capable of displaying the response state, so there is a drawback that the user cannot confirm whether the user inputs a predetermined number of times correctly when the cryptographic key is input. .

본 발명은 이러한 종래의 결점을 해결하기 위하여, 암호가 설정되어 있는 상태에서 암호가 설정되어 있음을 나타내는 문자표시신호를 출력하여 표시함과 아을러 암호키신호가 입력될때마다 그에 대응하는 도형문자 표시신호를 출력하여 암호키신호의 입력에 따른 응답상태를 표시하게 창안한 것으로, 이를 첨부된 도면을 참조하여 상세히 설명하면 다음과 같다.In order to solve the above-mentioned drawbacks, the present invention outputs and displays a character display signal indicating that a password is set in a state in which a password is set, and displays a graphic character corresponding to each time an outer encryption key signal is input. Invented to display a response state according to the input of the encryption key signal by outputting a signal, which will be described in detail with reference to the accompanying drawings.

제2도는 본 발명 텔레비젼 수상기의 화면표시부 희로로서, 이에 도시한 바와같이 화면표시문자출력부(1)의 출력만자(r,g,b)에서 출력되는 온스크린문자표시신호 또는 티브이신호출력부(2)의 출력단자(R,G,B)에서 출력되는 영상신호가 스위칭부(3)에서 선택되어 영상출력부(4)에 인가되는 표시장치에 있어서, 상기 화면표시문자출력부(1)의 스위칭신호출력단자(S/`V) 및 영상소거출력단자(P八V)를 오아게이트(ORl)를 통해상기 스위칭부(3)의 제어단자에 접속하여, 상기 스위칭신호출력단자(S/`V)에서 고전위의 스위칭신호가 츌력되던가 상기 영상소거출력단자(Y/`V)에서 고전위의 영상소거신호가 출력될때 상기 화면표시문자출력부(1)의 출력단자(r,g,b)의 온스크린문자표시신호를 상기 스위칭부(3)의 스위치(S1-S3)에서 선택하여 영상출력부(4)에 인가하게 구성한다.2 is a screen display unit of the television receiver according to the present invention. As shown therein, an on-screen character display signal or a TV signal output unit (outputted from the output characters r, g and b) of the screen display character output unit 1 is shown. In the display device in which the video signal output from the output terminals R, G, and B of 2) is selected by the switching unit 3 and applied to the video output unit 4, The switching signal output terminal S / `V and the image erasing output terminal P 八 V are connected to the control terminal of the switching unit 3 through an ora gate ORl to switch the switching signal output terminal S /`. When the high potential switching signal is output at V) or the high potential image erasing signal is output at the image erasing output terminal (Y / `V), the output terminals r, g, and b of the screen display character output unit 1 are output. On-screen text display signal of the () is selected by the switch (S1-S3) of the switching unit 3 is configured to apply to the image output unit (4).

제3도는 본 발명의 표시방법에 의한 문자표시제어흐름도, 제4도는 본 발명에 의해 온스크린문자표시신호의 표시신호의 표시과정을 보인 예시도로서, 이 제3도 및 제4도를 창조하여 본 발명의 화면 표시방법을 상세히 설명하면 다음과 같다.FIG. 3 is a flow chart of a character display control according to the display method of the present invention, and FIG. 4 is an exemplary view showing a display process of a display signal of an on-screen character display signal according to the present invention. The screen display method of the present invention will be described in detail as follows.

먼저, 암호가 설정되어 있는 상태에서 화면표시문자출력부(1)에서 그의 영상소거신흐출력단자(P/W)에 고전위 상태의 영상소거신호를 출력하고, 그 암호데이타를 판독한 후 사용자에게 암호가 설정되어 있음을 알리는 문자표시신호를 그의 출력만자(r,g,b)에 출력한다. 따라서, 이때 영상소거신호출력단자(P/`V)에 출력된 고전위의 영상소거신호가 오아게이트(ORl)를 통해 스위칭부(3)의 제어단자에 인가되므로 그외 스위치(S1-S3)가 그의 일측단자(a1-a3)에 단락되고, 이에 따라 상기 화면표시문자출력부(1)의 출력단자(r,g,b)에 출력되는 문자표시신호가 그 스위칭부(3)를 통해 영상출력부(4)에 인가되어 브라운관에 제4도의 상만표시부분(f)에서와 같이 표시됨으로써 암호가 설정되어 있음을 인지할 수 있게된다.First, while the password is set, the screen display character output unit 1 outputs a video erasing signal of high potential state to its video erasing signal output terminal P / W, and reads the password data to the user. A character display signal indicating that a password is set is output to its output characters (r, g, b). Accordingly, at this time, since the high potential image erasing signal outputted to the image erasing signal output terminal P / `V is applied to the control terminal of the switching unit 3 through the ORA gate ORl, other switches S1-S3 are applied. It is short-circuited to one side terminal (a1-a3) thereof, and thus the character display signal output to the output terminals (r, g, b) of the screen display character output unit (1) is outputted through the switching unit (3). Applied to the unit 4, it is displayed on the CRT as shown in only the image display portion f of FIG. 4, so that it is possible to recognize that the password is set.

이후, 화면표시문자출력부(1)의 내부 키입력수카운터(A)를 리세트하고, 그 카운터(A)의 값을 레지스터(B)에 저장하고, 횟수카운터(C)를 리세트한다. 이후 상기 례지스터(B)에 저장된 값이 "0"이하인 경우에는 칼라 1의 도형문자신호를 그의 출력단자(r,g,b)로 출력하여 제4도(가)의 하단표시부분(g)과 같이 표시하며, 이후 상기 레지스터(B)에 저장된 값에서 "1"을 빼고, 상기 횟수카운터(C)에 1을 더한 후 상기 횟수카운터(C)의 값이 "4"가 될때까지 상기 레지스터(B)의 값이 "0"이하 인가를 판별하는 스텝이하의 과정을 반복수행한다. 이와같이 하여 횟수카운터(C)의 값이 "4"가 되면 키신호를 입력받고 상기 키입력수카운터(A)에 "1"을 더한 후 그 카운터(A)의 값이 "4"가 되고 상기 레지스터(B)의 값이 "1"이 될때까지 상기 키입력수카운터(A)의 값이 례지스터(B)에 저장하는 스텝이하의 과정을 반복수행한다. 한편, 상기에서 레지스터(B)의 값이 "0"이하가 아니면 즉, "1"이상이면 칼라 2의 도형문자신호를 출력하여 제4도(나)의 하단표시부본(g)에서와 같이 표시한다(빗금친 부분).Thereafter, the internal key input number counter A of the screen display character output unit 1 is reset, the value of the counter A is stored in the register B, and the number counter C is reset. If the value stored in the example gist B is less than or equal to " 0 ", the graphic character signal of color 1 is outputted to its output terminals r, g and b so as to display the lower part of the figure 4 g. After that, "1" is subtracted from the value stored in the register B, 1 is added to the count counter C, and the register (until the value of the count counter C becomes "4"). Steps below to determine whether or not the value of B) is " 0 " are repeated. In this way, when the value of the count counter C becomes "4", a key signal is input, the value of the counter A becomes "4" after adding "1" to the key input count counter A, and the register Until the value of (B) is " 1 ", the following steps are repeated until the value of the key input number counter A is stored in the example resistor B. FIG. On the other hand, if the value of the register B is not less than " 0 ", that is, more than " 1 ", the graphic character signal of color 2 is outputted and displayed as shown in the lower display copy g of FIG. (Hatched)

이들 제4도 하단표시부분(9)의 첫번째, 두번째, 세번째, 네번째 표시부분을 gl,g2,g3,g4라 가정하여 보다 상세히 설명한다.The first, second, third, and fourth display portions of these fourth lower display portions 9 are assumed to be gl, g2, g3, g4 and described in more detail.

먼저, 초기상태에서 키입력수카운터(A)가 리세트되므로 례지스터(B)의 값은 "0"으로 되고, 이에따라 횟수카운터(C)의 값이 0,1,2,3으로 증가함에 따라 하단표시부분(g)에는 순차로 gl, g2,g3,g4에 칼라 1을 표시하여 제4도의 (가)와 같이된다First, since the key input number counter A is reset in the initial state, the value of the example resistor B becomes "0", and as the value of the count counter C increases to 0, 1, 2, 3, In the lower display part (g), color 1 is sequentially displayed in gl, g2, g3, and g4, as shown in FIG. 4A.

이후 횟수카운터(C)의 값이 "4"가 되면 키신로를 입력받아 키입력수카운터(A)가 "1"이 되므로 레지스터(B)의 값이 "1"로 되고, 이때 횟수카운터(C)는 리세트되어 그의 값이 "0"이 되며, 이후 그 횟수카운터(C)의 값이 0,l,2,3으로 중가함에 따라 순차로 g1에는 칼라 2를 표시하고, g2,g3,g4에는 칼라 1를 표시하여 제4도의 (나)와 같이 된다.After that, when the value of the count counter C becomes "4", the value of the register B becomes "1" because the key input number counter A becomes "1", and the count counter C becomes "1". ) Is reset and its value becomes "0". Then, as the value of the counter C increases to 0, l, 2,3, color 2 is sequentially displayed in g1, and g2, g3, g4 Color 1 is displayed as shown in (b) of FIG.

이후 횟수카운터(C)의 값이 "4"가 되면 키신호를 다시 입력받아 키입력수카운터(A)가 "2"가 되므로 레지스터(B)의 값이 "2"로 되고, 이때 횟수카운터(C)는 리세트되어 그의 값이 "0"이 되며, 이후 그 횟수카운터(C)의 값이 0,1,2,3으로 증가함에 따라 순차로 g1,g2에는 칼라 2를 표시하고, 93,94에는 칼라 1을 표시하여 제4도의 (다)와 같이 된다.After that, when the value of the count counter C becomes "4", the key signal is input again and the key input count counter A becomes "2", so that the value of the register B becomes "2". C) is reset so that its value becomes " 0 ". Then, as the value of the counter C increases to 0,1,2,3, color 2 is sequentially displayed in g1, g2, and 93, In Fig. 94, the color 1 is displayed as shown in FIG.

이와같은 과정을 반복하여 키신호를 세번째 입력받을때에는 순차로 g1,g2,g3에 칼라 2를 표시하고, g4에 칼라 1를 표시하여 제4도의 (라)와 같이 되고, 키신호를 네번째 입력받을때에는 순차로 g1,g2,g3,g4에 칼라 2를 표시하여 제4도의 (마)와 같이된다.Repeating the above process, when receiving the key signal for the third time, color 2 is displayed in g1, g2, g3 and color 1 is displayed in g4 as shown in (D) of FIG. 4 to receive the fourth signal. In this case, colors 2 are sequentially displayed on g1, g2, g3, and g4, as shown in FIG.

이와같이 키신호가 입력됨에 따라 제4도의 (가) 내지 (마)에 도시된 바와같이 칼라 1의 도형문자표시는 순차적으로 1씩 감소하고, 칼라 2의 도형문자표시는 순차적으로 1씩 증가하므로서 사용자는 키신호 응답상태를 인지할 수 있게된다.As the key signal is input in this way, as shown in (a) to (e) of FIG. 4, the graphic character display of the color 1 is sequentially decreased by one, and the graphic character display of the color 2 is sequentially increased by one, so that the user is sequentially increased. Can recognize the key signal response state.

여기서, 키입력수카운터(A) 및 횟수카운터(C)의 값이 4까지 증가하게 한것은 암호를 4자리 숫자로 설정한 경우를 예로들어 설명하였기 때문이다.Here, the values of the key input number counter A and the number counter C increase to 4 because the case where the password is set to 4 digits is described as an example.

한편, 상기에서와 같이 키신호를 4번 입력시켜 키입력수카운터(A)의 값이 "4"가 되고, 그에따라 칼라 2를 상기의 설명에서와 같이 4번 표시하여 레지스터(B)외 값이 1로 되면 입력된 4자리의 키신호가 이미 설정되어 있는 암호데이타와 동일한가를 판별하고, 이때 동일한 경우에는 온스크린문자표시신호의 출력을 해제함과 아울러 영상 및 음성소거신호의 츌력을 차단하여, 종래의 텔레비젼 수상기와 같이 정상적으로 동작되게 하고, 키신호가 이미 설정되어 있는 암호와 동일하지 않는 경우에는 암호재입력 인가를 다시 판별하여, 암호재입력인 경우에는 상기의 설명에서와 같이 텔레비젼 수상기가 정상적으로 동작되게 하고, 암호 재입력이 아닌 정우에는 상기 영상 및 음성소거신호를 출력하는 스텝이하의 과정을 반복수행한다.On the other hand, as described above, the key signal is input four times so that the value of the key input number counter A becomes " 4 ", and accordingly, the color 2 is displayed four times as described above to display the value outside the register B. If it is 1, it is determined whether the input 4-digit key signal is the same as the already set encryption data.In this case, the output of the on-screen text display signal is canceled and the output of the video and audio mute signal is cut off. If the key signal is not the same as the password that is already set, it is determined again whether the password is re-entered. In the case of the password re-entry, the television receiver is operated as described above. Normal operation is performed, and the following steps are repeated for outputting the video and audio mute signal in the case of not being inputted again.

이상에서 상세히 실명한 바와같이 본 발명은 암호키신호가 입력됨에 따라 칼라 1의 표시는 1씩 감소시키고 칼라 2의 표시는 2씩 증가시켜 그 응답상태를 표시하게 되므로 사용자는 그 응답상태를 보면서 암호키신호를 소정횟수 올바르게 입력시킬 수 있는 효과가 있게 된다.As described in detail above, in the present invention, as the encryption key signal is input, the display of the color 1 decreases by 1 and the display of the color 2 increases by 2 to display the response state. There is an effect that the key signal can be correctly input a predetermined number of times.

Claims (1)

화면표시문자출력부(1)의 온스크린문자표시신호 또는 티브이신호출력부(2)의 영상신호가 상기 화면표시문자출력부(1)의 스위칭신호에 따라 스위칭부(3)에서 선택되어 영상출력부(4)에 인가되는 텔례비젼 수상기의 화면표시부에 있어서, 암호가 설정되어 있는 상태에서 상기 화면표시문자출력부(1)에서 영상소거신호를 출력하여 상시 스위칭부(3)에서 그 화면표시문자출력부(l)의 출력을 선택하게 한 후 그 화면표시문자출력부(l)에서 암호데이타를 읽고, 암호가 설정되어 있음을 나타내는 문자표시신호를 출력하여 상기 영상츌력부(4)에 인가하고, 이후 암호수에 따른 소정수외 키신호가 입력될때마다 상기 화면표시문자출력부(1)에서 순차적으로 칼라 1신호는 1씩 감소시키고 칼라 2신호는 1씩 증가시켜 상기 영상출력부(4)에 인가함으로써 상기 키신호의 입력에 따른 응답상태가 표시되게 함을 특징으로 하는 텔레비젼 수상기의 화면 표시방법.The on-screen character display signal of the screen display character output unit 1 or the video signal of the TV signal output unit 2 is selected by the switching unit 3 according to the switching signal of the screen display character output unit 1 to output the image. In the screen display unit of the television vision receiver applied to the unit 4, the image display signal is output from the screen display character output unit 1 while a password is set, and the switching unit 3 displays the screen display character. After the output of the output unit (1) is selected, the screen display character output unit (1) reads the encryption data, outputs a character display signal indicating that the password is set, and applies it to the image output unit (4). Then, whenever a predetermined number of key signals according to the number of ciphers are input, the screen display character output unit 1 sequentially decreases the color 1 signal by 1 and increases the color 2 signal by 1 to the image output unit 4. Of the key signal A display method of a television receiver, characterized in that the response state according to the input is displayed.
KR1019870007657A 1987-06-30 1987-07-15 Display method of tv KR900006268B1 (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
KR1019870007657A KR900006268B1 (en) 1987-07-15 1987-07-15 Display method of tv
US07/211,898 US5033085A (en) 1987-06-30 1988-06-27 Method for controlling video and audio of a television set
CA000570652A CA1321016C (en) 1987-06-30 1988-06-28 Method for controlling video and audio of television set
GB8815523A GB2206759B (en) 1987-06-30 1988-06-29 Method for controlling video and audio of television set
BR8803209A BR8803209A (en) 1987-06-30 1988-06-29 METHOD FOR CONTROLING THE VIDEO AND AUDIO OF A TELEVISOR THROUGH THE USE OF A CODE
DE3822062A DE3822062A1 (en) 1987-06-30 1988-06-30 METHOD FOR CONTROLLING VIDEO AND AUDIO OPERATION OF A TELEVISION
IT21183/88A IT1217983B (en) 1987-06-30 1988-06-30 METHOD TO CONTROL THE VIDEO AND AUDIO OF A TV
FR8808834A FR2617658B1 (en) 1987-06-30 1988-06-30 METHOD FOR CONTROLLING A TELEVISION RECEIVER
JP63161117A JP2723542B2 (en) 1987-06-30 1988-06-30 Video and audio control method for television receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019870007657A KR900006268B1 (en) 1987-07-15 1987-07-15 Display method of tv

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Publication Number Publication Date
KR890003220A KR890003220A (en) 1989-04-13
KR900006268B1 true KR900006268B1 (en) 1990-08-27

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Application Number Title Priority Date Filing Date
KR1019870007657A KR900006268B1 (en) 1987-06-30 1987-07-15 Display method of tv

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Country Link
KR (1) KR900006268B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100609231B1 (en) * 2004-12-22 2006-08-02 엘지전자 주식회사 Method to display state of security communication in Data Broadcasting

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100609231B1 (en) * 2004-12-22 2006-08-02 엘지전자 주식회사 Method to display state of security communication in Data Broadcasting

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KR890003220A (en) 1989-04-13

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