KR970058019A - Image signal discrimination device of PDTV - Google Patents

Image signal discrimination device of PDTV Download PDF

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Publication number
KR970058019A
KR970058019A KR1019950055670A KR19950055670A KR970058019A KR 970058019 A KR970058019 A KR 970058019A KR 1019950055670 A KR1019950055670 A KR 1019950055670A KR 19950055670 A KR19950055670 A KR 19950055670A KR 970058019 A KR970058019 A KR 970058019A
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KR
South Korea
Prior art keywords
signal
video signal
discrimination
counted
selected channel
Prior art date
Application number
KR1019950055670A
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Korean (ko)
Other versions
KR100196834B1 (en
Inventor
박준석
Original Assignee
배순훈
대우전자 주식회사
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Priority to KR1019950055670A priority Critical patent/KR100196834B1/en
Publication of KR970058019A publication Critical patent/KR970058019A/en
Application granted granted Critical
Publication of KR100196834B1 publication Critical patent/KR100196834B1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/04—Synchronising
    • H04N5/08—Separation of synchronising signals from picture signals
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/28—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
    • H03K19/20—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits characterised by logic function, e.g. AND, OR, NOR, NOT circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K21/00—Details of pulse counters or frequency dividers
    • H03K21/38—Starting, stopping or resetting the counter
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/08—Details of the phase-locked loop

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Multimedia (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Signal Processing (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Television Systems (AREA)

Abstract

본 발명은 피디피 티브이(PDP TV)의 영상신호 판별장치에 관한 것으로, 외부로부터의 선택신호에 의거하여 선택된 채널의 영상신호가 유신호인 경우, PLL로부터 동기분리부에서 분리된 수평동기신호(Hs)에 동기되는 클럭이 카운터로 제공되고, 외부로부터 제공되는 기준클럭 내에서 설정된 소정갯수(예를 들면, 1024개)가 카운터를 통해 계수되어, 기준클럭 내에서 설정된 소정갯수가 계수되면 D플립플롭으로부터 하이레벨신호, 즉 선택된 채널의 영상신호가 유신호라는 판별신호가 발생되며, 기준클럭 내에서 설정된 소정갯수가 계수되지 않으면 D플립플롭으로부터 로우레벨신호, 즉 선택된 채널의 영상신호가 무신호라는 판별신호가 각각 발생되므로써, 선택된 채널의 유무판별신호에 의거하여 신호처리과정을 다르게 지정할 수 있으므로, 선택된 채널이 무신호인 경우에 발생되는 PDP TV의 오동작을 사전에 방지할 수 있도록 한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video signal discrimination apparatus of a PDP TV. When the video signal of a channel selected on the basis of an external selection signal is an oil signal, a horizontal synchronous signal (Hs) separated from the PLL by a synchronization separator. A clock synchronized to the clock is provided to the counter, and a predetermined number (for example, 1024) set in the reference clock provided from the outside is counted through the counter, and when the predetermined number set in the reference clock is counted, the D flip-flop is counted. A discrimination signal is generated that the high level signal, that is, the video signal of the selected channel is a valid signal, and if the predetermined number set in the reference clock is not counted, a low level signal from the D flip-flop, that is, the discrimination signal that the video signal of the selected channel is no signal. Are generated separately, so that the signal processing process can be specified differently based on the presence or absence discrimination signal of the selected channel. This is to prevent the malfunction of the PDP TV generated in the case of no signal.

Description

피디피 티브이의 영상신호 판별장치PDTV's video signal discrimination device

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 본 발명의 바람직한 실시예에 따른 피디피 티브이(PDP TV)의 영상신호 판별장치의 개략적인 블록구성도.1 is a schematic block diagram of an apparatus for determining a video signal of a PDP TV according to a preferred embodiment of the present invention.

제2도는 본 발명에 따른 판별결과로서, 영상신호가 유신호인 경우를 설명하기 위한 도면.2 is a diagram for explaining a case where a video signal is a flow signal as a result of discrimination according to the present invention.

제3도는 본 발명에 따른 판별결과로서, 영상신호가 무신호인 경우를 설명하기 위한 도면.3 is a view for explaining a case where a video signal is no signal as a result of discrimination according to the present invention.

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

110 : 동기분리부 120 : PLL110: sync separation unit 120: PLL

130 : 카운터 140 : D플립플롭130: counter 140: D flip-flop

Claims (1)

외부로부터의 선택신호에 의거하여 선택된 채널의 영상신호를 판별하는 피디피 티브이(PDP TV)장치에 있어서, 상기 영상신호 중에 포함되어 있는 수평동기 신호를 분리하기 위한 동기분리수단(110); 상기 동기분리수단(110)에서 분리된 수평동기신호에 동기되는 클럭을 발생하는 PLL(120); 외부로부터 제공되는 기준클럭 내에서 상기 PLL(120)을 통해 동기되어 발생되는 클럭갯수를 계수하여 그에 따른 카운트신호를 발생하는 카운터(130); 외부로부터의 뮤트신호에 의거하여 리셋되며, 상기 카운터(130)로부터의 카운트신호에 의거하여 그에 상응하는 상기 선택된 채널에 대한 영상신호의 유무판별신호를 출력하는 D플립플롭(140)으로 구성된 것을 특징으로 하는 피디피 티브이(PDP TV)의 영상신호 판별장치.A PDP TV device for determining a video signal of a selected channel based on a selection signal from the outside, comprising: sync separating means (110) for separating horizontal sync signals included in the video signal; A PLL (120) generating a clock synchronized with the horizontal synchronization signal separated by the synchronization separating means (110); A counter 130 for counting the number of clocks generated in synchronization with the PLL 120 in a reference clock provided from the outside and generating a count signal according thereto; It is reset based on the mute signal from the outside, and based on the count signal from the counter 130 is configured to D flip-flop 140 for outputting the presence or absence discrimination signal of the video signal corresponding to the selected channel A video signal discrimination apparatus of a PDP TV. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950055670A 1995-12-23 1995-12-23 Apparatus for distinguishing the video signal in pdp in tv KR100196834B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950055670A KR100196834B1 (en) 1995-12-23 1995-12-23 Apparatus for distinguishing the video signal in pdp in tv

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950055670A KR100196834B1 (en) 1995-12-23 1995-12-23 Apparatus for distinguishing the video signal in pdp in tv

Publications (2)

Publication Number Publication Date
KR970058019A true KR970058019A (en) 1997-07-31
KR100196834B1 KR100196834B1 (en) 1999-06-15

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KR1019950055670A KR100196834B1 (en) 1995-12-23 1995-12-23 Apparatus for distinguishing the video signal in pdp in tv

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Publication number Publication date
KR100196834B1 (en) 1999-06-15

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