KR960016397A - Broadcast Channel Memory Circuit in Television - Google Patents

Broadcast Channel Memory Circuit in Television Download PDF

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Publication number
KR960016397A
KR960016397A KR1019940027596A KR19940027596A KR960016397A KR 960016397 A KR960016397 A KR 960016397A KR 1019940027596 A KR1019940027596 A KR 1019940027596A KR 19940027596 A KR19940027596 A KR 19940027596A KR 960016397 A KR960016397 A KR 960016397A
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KR
South Korea
Prior art keywords
signal
channel
broadcast
tuner
input
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KR1019940027596A
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Korean (ko)
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KR0124405B1 (en
Inventor
김민태
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배순훈
대우전자 주식회사
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Priority to KR1019940027596A priority Critical patent/KR0124405B1/en
Publication of KR960016397A publication Critical patent/KR960016397A/en
Application granted granted Critical
Publication of KR0124405B1 publication Critical patent/KR0124405B1/en

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    • 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
    • H04N5/50—Tuning indicators; Automatic tuning control
    • 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
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/52—Automatic gain control

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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)

Abstract

본 발명은 방송채널자동검색모도시 수신강도가 양호한 상태의 방송채널만을 메모리할 수 있도록 된 텔레비전에서의 방송채널 메모리회로를 제공한다.The present invention provides a broadcast channel memory circuit in a television in which only a broadcast channel having a good reception strength can be stored.

이를 위해 본 발명은, 키입력부(40)로부터의 채널에 대환 키입력신호에 따라 튜너(11)가 마이콤(20)으로부터 소정의 시간간격을 두고 순차적으로 송출되는 채널 데이터에 의해 채널을 선국하고 방송신호가 있는 채널만 메모리하는 방송채널 자동검색모드를 갖춘 텔레비전에 있어서, 그 제1입력단자로 현재 상기 튜너(11)에 의해 선국된 채널의 방송신호를 보상하기 위해 상기 튜너(11)로부터 출력되는 자동이득 제어신호(AGC신호)를 입력받고 그 제2입력단자로 복합영상신호가 입력될 경우에 방송신호가 있다는 것을 나타내기 위한 소정의 인식신호(ID신호)를 입력받아 상기 튜너(11)로부터의 자동이득제어 신호레벨이 제로레벨에 근사이고 상기 영상처리부(13)로부터의 인식신호가 있는 경우(즉 하이레벨상태)에만 상기 마이콤(20)의 제어부(21)로 소정의 제어신호를 송출하는 신호판별부(30)를 구비하여 구성된다.To this end, according to the present invention, the channel is tuned by the channel data sequentially transmitted by the tuner 11 at a predetermined time interval from the microcomputer 20 in accordance with the exchange key input signal to the channel from the key input unit 40 and broadcast. In a television having a broadcast channel auto search mode in which only a channel containing a signal is memorized, the first input terminal is output from the tuner 11 to compensate for a broadcast signal of a channel currently tuned by the tuner 11. When the automatic gain control signal (AGC signal) is input and the composite video signal is input to the second input terminal, the tuner 11 receives a predetermined recognition signal (ID signal) to indicate that there is a broadcast signal. The control gain of the microcomputer 20 is controlled by the control unit 21 of the microcomputer 20 only when the signal level of the automatic gain control signal is approximated to zero and there is a recognition signal from the image processor 13 (that is, the high level state). It is comprised by the signal discrimination part 30 which sends a call.

Description

텔레비전에서의 방송채널 메모리회로Broadcast Channel Memory Circuit in Television

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제1도는 본 발명에 따른 텔레비전에서의 방송채널 메모리회로의 주요부의 구성 및 그 동작흐름을 설명하기 위한 블록도이다,1 is a block diagram for explaining the configuration and operation flow of main parts of a broadcast channel memory circuit in a television according to the present invention.

Claims (2)

키입력부(40)로부터의 채널에 대한 키입력신호에 따라 튜너(11)가 마이콤(20)으로부터 소정의 시간간격을 두고 순차적으로 송출되는 채널 데이터에 의해 채널을 선국하고 방송신호가 있는 채널만 메모리하는 방송채널 자동검색모드를 갖춘 텔레비전에 있어서, 그 제1입력단자로 현재 상기 튜너(11)에 의해 선국된 채널의 방송신호의 특성을 보상하기 위해 상기 튜너(11)로부터 출력되는 자동이득 제어신호(AGC신호)를 입력받고 그 제2입력단자로 복합영상신호가 입력될 경우에 방송신호가 있다는 것을 나타내기 위한 소정의 인식신호(ID신호)를 입력받아 상기 튜너(11)로부터의 자동이득제어 신호레벨이 제로레벨에 근사이고 상기 영상처리부(13)로부터의 인식신호가 있는 경우(즉 하이레벨상태)에만 상기 마이콤(20)의 제어부(21)로 소정의 제어신호를 송출하는 신호판변부(30)를 구비하여 구성된 것을 특징으로 하는 텔레비전에서의 방송채널 메모리회로.According to the key input signal for the channel from the key input unit 40, the tuner 11 tunes the channel by channel data sequentially transmitted from the microcomputer 20 at a predetermined time interval, and only a channel having a broadcast signal is stored in memory. In a television having a broadcast channel automatic search mode, an automatic gain control signal output from the tuner 11 to compensate for characteristics of a broadcast signal of a channel currently tuned by the tuner 11 as its first input terminal. When the AGC signal is input and the composite video signal is input to the second input terminal, an automatic gain control from the tuner 11 is received by receiving a predetermined recognition signal (ID signal) to indicate that there is a broadcast signal. Only when the signal level is close to zero level and there is a recognition signal from the image processing unit 13 (that is, the high level state), a predetermined control signal is sent to the control unit 21 of the microcomputer 20. Broadcast channel memory circuit in a television comprising a signal board side (30). 제1항에 있어서, 상기 신호판별부(30)는 그 제1입력단자에 나트게이트 회로(NOT)가 접속되어 튜너(11)로부터의 자동이득제어신호(AGC신호)가 상기 나트게이트회로(NOT)에 의해 반전된 신호출력이 입력되고, 그 제2입력단자에 상기 영상처리부(13)로부터의 인식신호(ID신호)가 입력되는 앤드게이트회로(AND)로 이루어져 있는 것을 특징으로 하는 텔레비전에서의 방송채널 메모리회로.2. The signal discrimination unit 30 according to claim 1, wherein a nat gate circuit NOT is connected to a first input terminal of the signal discriminator 30 so that the automatic gain control signal AGC signal from the tuner 11 is the nat gate circuit NOT. And an AND gate circuit (AND) for inputting a signal output inverted by the second input terminal and inputting a recognition signal (ID signal) from the image processing unit 13 to the second input terminal thereof. Broadcast channel memory circuit. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940027596A 1994-10-27 1994-10-27 Broadcasting channel memory in television KR0124405B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940027596A KR0124405B1 (en) 1994-10-27 1994-10-27 Broadcasting channel memory in television

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019940027596A KR0124405B1 (en) 1994-10-27 1994-10-27 Broadcasting channel memory in television

Publications (2)

Publication Number Publication Date
KR960016397A true KR960016397A (en) 1996-05-22
KR0124405B1 KR0124405B1 (en) 1997-12-01

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100406985B1 (en) * 2001-08-11 2003-11-28 삼성전자주식회사 Television displaying a searched channel during auto search, and a method for displaying searched channel of the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100406985B1 (en) * 2001-08-11 2003-11-28 삼성전자주식회사 Television displaying a searched channel during auto search, and a method for displaying searched channel of the same

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Publication number Publication date
KR0124405B1 (en) 1997-12-01

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