KR930007234A - Tuner / Line Mode Automatic Switch - Google Patents

Tuner / Line Mode Automatic Switch Download PDF

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Publication number
KR930007234A
KR930007234A KR1019910016013A KR910016013A KR930007234A KR 930007234 A KR930007234 A KR 930007234A KR 1019910016013 A KR1019910016013 A KR 1019910016013A KR 910016013 A KR910016013 A KR 910016013A KR 930007234 A KR930007234 A KR 930007234A
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KR
South Korea
Prior art keywords
tuner
line
mode switching
microcomputer
video
Prior art date
Application number
KR1019910016013A
Other languages
Korean (ko)
Other versions
KR930010482B1 (en
Inventor
신근철
Original Assignee
이헌조
주식회사 금성사
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Publication date
Application filed by 이헌조, 주식회사 금성사 filed Critical 이헌조
Priority to KR1019910016013A priority Critical patent/KR930010482B1/en
Publication of KR930007234A publication Critical patent/KR930007234A/en
Application granted granted Critical
Publication of KR930010482B1 publication Critical patent/KR930010482B1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • 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
    • 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
    • H04N5/00—Details of television systems
    • H04N5/63—Generation or supply of power specially adapted for television receivers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2231/00—Applications
    • H01H2231/036—Radio; TV

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Circuits Of Receivers In General (AREA)
  • Studio Circuits (AREA)

Abstract

본 발명은 튜너/라인 모드 자동 절환장치에 관한 것으로, 종래에는 수동스위츨 두어 튜너/라인 모드 절환시 수동으로 선택 절환해야 하는데, 본 발명은 라인 비디오 입력을 검출하여 라인 비디오 신호의 동기신호가 검출되면 마이컴이 라인 모드 절환 제어를 하게 하고, 라인 비디오 신호의 동기신호가 검출되지 않으면 튜너 모드로 절환제어를 하게 하며, 그 마이컴의 재생 모드 절환 제어신호를 검출하여 라인 비디오 입력의 동기검출을 위한 버퍼단 및 동기검출단의 전원전압을 제어하는 전원제어부를 구비시키므로써, 재생모드가 아닌 경우에만 라인 비디오 입력 유무에 따라 튜너/라인 모드 절환을 자동 제어하게 하여 사용상의 편리함을 제공하기 위한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tuner / line mode automatic switching device. In the related art, a manual switch is required to manually select and change the tuner / line mode switching. If the microcomputer performs line mode switching control, if the sync signal of the line video signal is not detected, the microcomputer switches to tuner mode. The microcom is configured to detect the playback mode switching control signal and detects the line video input. And a power control unit for controlling the power supply voltage of the synchronous detection stage, so as to provide convenience in use by automatically controlling the tuner / line mode switching according to the presence or absence of the line video input only in the non-playback mode.

Description

튜너/라인 모드 자동 절환장치Tuner / Line Mode Automatic Switch

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

제2도는 본 발명에 따른 튜너/라인 모드 자동절환장치 구성도.2 is a block diagram of a tuner / line mode automatic switching device according to the present invention.

제3도 (가) 내지 (다)는 제2도에 따른 동작설명을 위한 파형도.3 (a) to (c) are waveform diagrams for explaining the operation according to FIG.

제4도는 제2도에 따른 튜너/라인 모드 자동 절환 동작흐름도.4 is a flow chart of tuner / line mode automatic switching according to FIG.

Claims (2)

마이컴(12)의 튜너/라인 모드 절환 제어에 따라 튜너/라인비디오, 오디오선택스위치(SW1),(SW3)를 통해서 각기 튜너/라인비디오입력(1),(2), 오디오입력(4),(5)을 선택하게 하고, 상기 마이컴(12)의 재생 모드 절환 제어신호에 따라 그 튜너/라인비디오, 오디오선택스위치(SW1)(SW3)의 출력과 재생비디오, 오디오신호(3),(6)를 각기 비디오, 오디오선택스위치(SW2),(SW4)를 통해 절환선택하여 비디오, 오디오신호처리를 하게 구성된 튜너/라인 모드 절환장치에 있어서, 상기 라인비디오입력(2)을 임피던스정합을 위해 버퍼링하는 버퍼(21)와, 그 버퍼(21)를 통한 라인비디오입력(2)의 동기신호를 검출하여 상기 마이컴(12)에 튜너/라인 모드 절환 제어신호로 인가시켜 주는 동기검출단(22)과, 상기 마이컴(12)의 재생모드절환제어신호(PB-"H")를 반전버퍼링하는 반전 버퍼(23)와, 그 반전버퍼(23)의 출력에 따라 재생 모드가 아닐때 상기 버퍼(21) 및 동기검출단(22)에 동기전원전압(Vcc)을 공급하는 전원제어부(24)로 구성하여 된 것을 특징으로 하는 튜너/라인 모드 자동 절환장치.According to the tuner / line mode switching control of the microcomputer 12, the tuner / line video, the audio selection switches SW 1 and SW 3 , respectively, the tuner / line video inputs 1, 2, and audio input 4 ), (5), the output of the tuner / line video, audio selection switch (SW 1 ) (SW 3 ) and the playback video, audio signal (3) in accordance with the playback mode switching control signal of the microcomputer (12) In the tuner / line mode switching device configured to switch between video and audio signals by selecting () and (6) through video and audio selection switches (SW 2 ) and (SW 4 ), the line video input (2). To detect the synchronization signal of the line 21 and the line video input 2 through the buffer 21 and apply it to the microcomputer 12 as a tuner / line mode switching control signal. An inversion buffer for inverting the detection stage 22 and the regeneration mode switching control signal PB- " H " 23 and a power supply control unit 24 for supplying the synchronous power supply voltage Vcc to the buffer 21 and the synchronous detection terminal 22 when the regeneration mode is not in the regeneration mode. Tuner / line mode automatic switching device characterized in that. 제1항에 있어서, 동기검출단(22)은 버퍼(21)의 출력으로부터 동기신호를 분리하는 동기검출기(22-1)와, 동기검출을 위한 기준발진 출력을 하는 기준발진기(22-2)와 그 기준발진기(22-2)의 출력과 상기 동기검출기(22-1)의 출력을 앤드조합하여 마이컴(12)에 튜너/라인 모드 절환 제어신호로 인가시켜 주는 앤드게이트(AND1)로 구성하여 된 것을 특징으로 하는 튜너/라인 모드 자동 절환장치.2. The synchronization detector (22) according to claim 1, wherein the synchronization detector (22) includes a synchronization detector (22-1) for separating the synchronization signal from the output of the buffer (21), and a reference oscillator (22-2) for performing a reference oscillation output for synchronization detection. And an AND gate (AND 1 ) for applying the tuner / line mode switching control signal to the microcomputer 12 by combining the output of the reference oscillator 22-2 and the output of the synchronization detector 22-1 with the microcomputer 12. Tuner / line mode automatic switching device characterized in that. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019910016013A 1991-09-13 1991-09-13 Automatic switching device of line and tuner mode of tv KR930010482B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019910016013A KR930010482B1 (en) 1991-09-13 1991-09-13 Automatic switching device of line and tuner mode of tv

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019910016013A KR930010482B1 (en) 1991-09-13 1991-09-13 Automatic switching device of line and tuner mode of tv

Publications (2)

Publication Number Publication Date
KR930007234A true KR930007234A (en) 1993-04-22
KR930010482B1 KR930010482B1 (en) 1993-10-25

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ID=19319924

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019910016013A KR930010482B1 (en) 1991-09-13 1991-09-13 Automatic switching device of line and tuner mode of tv

Country Status (1)

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KR930010482B1 (en) 1993-10-25

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