KR970078470A - Automatic adjustment of screen width when letterbox signal is input - Google Patents

Automatic adjustment of screen width when letterbox signal is input Download PDF

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Publication number
KR970078470A
KR970078470A KR1019960018587A KR19960018587A KR970078470A KR 970078470 A KR970078470 A KR 970078470A KR 1019960018587 A KR1019960018587 A KR 1019960018587A KR 19960018587 A KR19960018587 A KR 19960018587A KR 970078470 A KR970078470 A KR 970078470A
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KR
South Korea
Prior art keywords
vertical
signal
screen
output
sync
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KR1019960018587A
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Korean (ko)
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KR100206589B1 (en
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조민수
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배순훈
대우전자 주식회사
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Priority to KR1019960018587A priority Critical patent/KR100206589B1/en
Publication of KR970078470A publication Critical patent/KR970078470A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/007—Systems with supplementary picture signal insertion during a portion of the active part of a television signal, e.g. during top and bottom lines in a HDTV letter-box system
    • 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
    • H03K4/00—Generating pulses having essentially a finite slope or stepped portions
    • H03K4/06—Generating pulses having essentially a finite slope or stepped portions having triangular shape
    • H03K4/08—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
    • H04N7/0117—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level involving conversion of the spatial resolution of the incoming video signal
    • H04N7/0122—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level involving conversion of the spatial resolution of the incoming video signal the input and the output signals having different aspect ratios

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Graphics (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Details Of Television Scanning (AREA)

Abstract

본 발명은 와이드 텔레비젼 수상기에 있어 레터박스 위치 감지회로에 관한 것으로, 종래에는 화면에 디스플레이되는 방송신호나 외부신호에 포함되어 있는 레터박스의 상하에 위치하고 있는 블랭킹부분이 화면에 디스플레이되는 경우 미도시된 리모콘이나 와이드 텔레비젼 수상기의 본체에 형성되어 있는 키를 조작하여 블랭킹부분이 보이지 않도록 화면의 상하폭을 조절하는데, 이때 방송신호나 외부신호에 포함되어 있는 블랭킹부분의 위치를 정확하게 알 수 없어 화면안에 레터박스와 영상신호가 정확하게 디스플레이되도록 조정하는데 어려움이 있었다. 본 발명은 방송신호나 외부신호에 합성되어 화면에 디스플레이되는 레터박스 신호의 위치를 검출하여 화면의 상하폭을 자동으로 조정할 수 있도록 하는 레터박스 신호 입력시 화면의 상하폭 자동 조정장치를 제공한다.The present invention relates to a letter box position sensing circuit in a wide television receiver, and in the related art, when a blanking portion located above and below a letter box included in a broadcast signal or an external signal displayed on a screen is displayed on a screen, it is not shown. Adjust the top and bottom width of the screen so that the blanking area is not visible by operating the keys formed on the main body of the remote control unit or wide television receiver.In this case, the position of the blanking part included in the broadcast signal or external signal cannot be accurately known. There was a difficulty adjusting the box and the video signal to be displayed correctly. The present invention provides an apparatus for automatically adjusting the vertical width of a screen when inputting a letterbox signal to detect the position of a letterbox signal synthesized with a broadcast signal or an external signal and automatically adjusting the vertical width of the screen.

Description

레터박스 신호 입력시 화면의 상하폭 자동 조정장치Automatic adjustment of screen width when letterbox signal is input

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

제1도는 본 발명의 일실시예에 따른 회로도.1 is a circuit diagram according to an embodiment of the present invention.

Claims (3)

입력 영상신호의 레벨을 조정하고 수직/수평 동기신호(V.sync/H.sync)를 분리하는 클램핑 회로 및 수직/수평 동기신호 분리부(11)와, 상기 클램프 회로 및 수직/수평 동기신호 분리부(11)의 수평 동기신호(H.sync)와 1/N분주기(25)의 기준 수평 동기신호(H.ref)의 위상을 비교하여 클럭펄스(CLK)를 발진하는 PLL 및 클럭 발진부(19)와, 상기 PLL 및 클럭발진부(19)에서 출력되는 클럭펄스(CLK)를 1/N의 기준 수평동기신호(H.ref)로 분주하는 1/N분주기(25)를 포함하여 구성된 텔레비젼 수상기에 있어서, 화면에 디스플레이되는 블랭킹 부분의 위치를 판단하고 이에 해당하는 카운팅값을 생성하는 블랭킹부분 위치 검출수단; 상기 블랭킹 부분 위치검출수단에 의해 검출된 위치데이타에 의해 화면의 상하폭을 조정하는 화면 상하폭 조정수단을 더 포함하여 구성되어짐을 특징으로 하는 레터박스 신호 입력시 화면의 상하폭 자동 조정장치.A clamping circuit and a vertical / horizontal sync signal separator 11 for adjusting the level of an input video signal and separating the vertical / horizontal sync signal (V.sync / H.sync), and separating the clamp circuit and the vertical / horizontal sync signal A PLL and a clock oscillator for comparing the phase of the horizontal synchronization signal H.sync of the unit 11 with the phase of the reference horizontal synchronization signal H.ref of the 1 / N divider 25 to generate the clock pulse CLK. 19) and a 1 / N divider 25 for dividing the clock pulse CLK outputted from the PLL and the clock oscillator 19 into a reference horizontal synchronization signal H.ref of 1 / N. A receiver comprising: blanking part position detection means for determining a position of a blanking part displayed on a screen and generating a counting value corresponding thereto; And an upper and lower width adjusting means for adjusting the upper and lower width of the screen by the position data detected by the blanking portion position detecting means. 제1항에 있어서, 상기 블랭킹 부분 위치검출수단은 상기 PLL및 클럭발진부(19)에서 공급되는 클럭펄스(CLK)를 카운팅하여 유효화면 부분에서 하이레벨의 체크펄스를 출력하는 체크펄스 발생기(21); 상기 체크펄스 발생기(21)에서 출력되는 체크펄스가 하이레벨을 유지하는 동안 상기 클램프 회로 및 수직/수평 동기신호 분리부(11)에서 공급되는 영상신호의 레벨과 기준전압(Vref)의 대소관계를 대비하는 비교기(13); 상기 PLL 및 클럭발진부(19)에서 공급되는 클럭펄스(CLK)를 1/K로 분주하는 1/K분주기(23); 상기 1/K분주기(23)의 출력에 의해 상기 비교기(13)의 출력을 일정시간 지연시켜 출력하는 D플립/플롭(15); 상기 클램프 회로 및 수직/수평 동기신호 분리부(11)에서 공급되는 수직동기신호(V.sync)의 라이징 에지에서 리세트되어 클램프 회로 및 수직/수평 동기신호 분리부(11)에서 출력되는 수평 동기신호(H.sync)를 카운팅하며 상기 D플립/플롭(15)의 출력에 의해 카운팅 동작을 정지하고 카운팅값을 후단으로 출력하는 라인 카운터(17)로 구성되어짐을 특징으로 하는 레터박스 신호 입력시 화면의 상하폭 자동 조정장치.2. The check pulse generator (21) according to claim 1, wherein said blanking portion position detecting means counts clock pulses (CLK) supplied from said PLL and clock oscillator (19) and outputs a high level check pulse at an effective screen portion. ; While the check pulse output from the check pulse generator 21 maintains a high level, the magnitude relationship between the level of the image signal supplied from the clamp circuit and the vertical / horizontal sync signal separator 11 and the reference voltage Vref is determined. Contrast comparator 13; A 1 / K divider 23 for dividing the clock pulse CLK supplied from the PLL and clock oscillator 19 to 1 / K; A D-flip / flop (15) for delaying the output of the comparator (13) by the output of the 1 / K divider (23) for a predetermined time; The horizontal synchronization is reset at the rising edge of the vertical synchronization signal V.sync supplied from the clamp circuit and the vertical / horizontal synchronization signal separation unit 11 and output from the clamp circuit and the vertical / horizontal synchronization signal separation unit 11. When inputting a letter box signal, characterized in that it consists of a line counter 17 for counting the signal (H.sync) and stopping the counting operation by the output of the D flip / flop (15) and outputs the counting value to the rear end. Automatic top and bottom width adjustment of the screen. 제1항에 있어서, 상기 화면 상하폭 조정수단은 상기 라인 카운팅수단에서 출력되는 카운팅값에 의해 화면의 줌양을 결정하고 이에 대응하는 수직 싸이즈 전압을 출력하는 줌양 결정부(27); 상기 줌양 결정부(27)에서 출력되는 수직 싸이즈 전압에 의해 상기 클램핑 회로 및 수직/수평 동기신호 분리부(11)에서 출력되어 변환되는 수직 톱니파의 이득을 조정하는 수직 톱니파 발생기(33); 상기 수직 톱니파 발생기(33)에서 출력되는 수직 톱니파에 의해 수직 편향코일에 공급되는 전류를 조절하는 수직 펄스 드라이브부(29)로 구성되어짐을 특징으로 하는 레터박스 신호 입력시 화면의 상하폭 자동 조정장치.The display apparatus of claim 1, wherein the screen vertical width adjusting means comprises: a zoom amount determining unit 27 for determining a zoom amount of the screen based on a counting value output from the line counting means and outputting a vertical size voltage corresponding thereto; A vertical sawtooth wave generator (33) for adjusting the gain of the vertical sawtooth wave output from the clamping circuit and the vertical / horizontal sync signal separator (11) and converted by the vertical magnitude voltage output from the zoom amount determiner (27); Automatic vertical adjustment device of the screen when the letter box signal input, characterized in that it consists of a vertical pulse drive unit 29 for adjusting the current supplied to the vertical deflection coil by the vertical sawtooth wave output from the vertical sawtooth wave generator 33 . ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019960018587A 1996-05-29 1996-05-29 Automatic image width control apparatus in case of letterbox input KR100206589B1 (en)

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KR1019960018587A KR100206589B1 (en) 1996-05-29 1996-05-29 Automatic image width control apparatus in case of letterbox input

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Application Number Priority Date Filing Date Title
KR1019960018587A KR100206589B1 (en) 1996-05-29 1996-05-29 Automatic image width control apparatus in case of letterbox input

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KR100206589B1 KR100206589B1 (en) 1999-07-01

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100503794B1 (en) * 2002-10-30 2005-07-26 삼성전자주식회사 Apparatus and method for controlling picture ratio and remote controller thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100503794B1 (en) * 2002-10-30 2005-07-26 삼성전자주식회사 Apparatus and method for controlling picture ratio and remote controller thereof

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