KR970057809A - Signal Processing Method and Circuit in Receiving Scrambled Broadcast in TV Receiver - Google Patents

Signal Processing Method and Circuit in Receiving Scrambled Broadcast in TV Receiver Download PDF

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Publication number
KR970057809A
KR970057809A KR1019950069168A KR19950069168A KR970057809A KR 970057809 A KR970057809 A KR 970057809A KR 1019950069168 A KR1019950069168 A KR 1019950069168A KR 19950069168 A KR19950069168 A KR 19950069168A KR 970057809 A KR970057809 A KR 970057809A
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KR
South Korea
Prior art keywords
signal
scramble
tuner
processing
broadcast
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KR1019950069168A
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Korean (ko)
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KR100192787B1 (en
Inventor
박경동
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배순훈
대우전자 주식회사
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Priority to KR1019950069168A priority Critical patent/KR100192787B1/en
Publication of KR970057809A publication Critical patent/KR970057809A/en
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Publication of KR100192787B1 publication Critical patent/KR100192787B1/en

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    • 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
    • H04N7/1675—Providing digital key or authorisation information for generation or regeneration of the scrambling sequence
    • 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
    • H04N5/445—Receiver circuitry for the reception of television signals according to analogue transmission standards for displaying additional information
    • 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
    • H04N5/505—Invisible or silent tuning

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

본 발명은 TV 수신기에 있어서 스크램블된 방송 수신시 신호처리방법 및 회로에 관한 것으로서, 안테나를 통해 수신된 방송신호의 채널을 선국하는 튜너와, 튜너로부터 선국되어 중간주파증폭된 방송신호중 음성신호를 처리하는 음성처리IC와, 튜너로부터 선국되어 중간주파증폭된 방송신호중 영상신호를 처리하는 영상처리IC를 구비한 TV 수신기에 있어서, 선국된 방송신호에 대하여 스크램블이 걸려있는지 여부를 검파하여, 영상신호와 음성신호 모두에 대하여 스크램블이 걸쳐있는 경우 다른 채널을 선국하는 제1제어신호, 음성신호에 대하여 스크램블이 걸쳐있는 경우 음성신호를 뮤트시키는 제2제어신호, 영상신호에 대하여 스크램블이 걸쳐있는 경우 영상신호를 차단시키는 제3제어신호를 출력하는 스크램블 검파기와 스크램블 검파기에서 출력되는 제1 내지 제3제어신호에 따라 튜너, 음성처리IC 및 영상처리IC를 제어하는 마이콤으로 구성된다. 따라서, 스크램블된 방송신호 수신시 음성처리IC 혹은 영상처리IC로 잡음이 입력되는 것을 방지할 수 있다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a signal processing method and circuit for receiving a scrambled broadcast in a TV receiver, comprising: a tuner for tuning a channel of a broadcast signal received through an antenna; A TV receiver having an audio processing IC for processing a video signal among broadcast signals tuned from a tuner and an intermediate frequency amplified signal, the TV receiver comprising: detecting whether a scramble is applied to the tuned broadcast signal; If the scramble is applied to all audio signals, the first control signal to tune to another channel; if the scramble is applied to the audio signal; the second control signal to mute the audio signal; and if the scramble is applied to the video signal. Output from the scramble detector and the scramble detector for outputting a third control signal for It is composed of a microcomputer that controls the tuner, the audio processing IC, and an image processing IC according to the third control signal to the first. Therefore, when the scrambled broadcast signal is received, noise may be prevented from being input to the voice processing IC or the image processing IC.

Description

TV 수신기에 있어서 스크램블된 방송 수신시 신호처리방법 및 회로Signal Processing Method and Circuit in Receiving Scrambled Broadcast in TV Receiver

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

제1도는 본 발명에 의한 TV 수신기에 있어서 스크램블된 방송 수신시 신호처리회로를 나타낸 블록도.1 is a block diagram showing a signal processing circuit upon receiving scrambled broadcast in a TV receiver according to the present invention.

제2도는 본 발명에 의한 TV 수신기에 있어서 스크램블된 방송 수신시 신호처리방법을 설명하기 위한 흐름도이다.2 is a flowchart illustrating a signal processing method when receiving a scrambled broadcast in a TV receiver according to the present invention.

Claims (3)

안테나를 통해 수신된 방송신호의 채널을 선국하는 튜너와, 튜너로부터 선국되어 중간주파증폭된 방송신호중 음성신호를 처리하는 음성처리IC와, 튜너로부터 선국되어 중간주파증폭된 방송신호중 영상신호를 처리하는 영상신호IC를 구비한 TV 수신기에 있어서, 상기 선국된 방송신호에 대하여 스크램블이 걸려있는지 여부를 검파하는 스크램블 검파단계 ; 상기 스크램블 검파단계에서의 검파결과 영상 및 음성신호에 대하여 스크램블이 걸쳐있는 경우에는 상기 튜너를 제어하여 채널을 절환하는 채널절환단계 ; 상기 스크램블 검파단계에서의 검파결과 음성신호에 대하여 스크램블이 걸쳐있는 경우에는 상기 음성처리IC를 제어하여 음성신호를 뮤트시키는 음성뮤트단계 ; 및 상기 스크램블 검파단계에서의 검파결과 영상신호에 대하여 스크램블이 걸쳐있는 경우에는 상기 영상처리IC를 제어하여 영상신호를 차단시키는 영상차단단계로 이루어지는 것을 특징으로 하는 TV 수신기에 있어서 스크램블된 방송 수신시 신호처리방법.A tuner that tunes a channel of a broadcast signal received through an antenna, a voice processing IC that processes an audio signal among broadcast signals tuned from the tuner and an intermediate frequency amplified signal; A TV receiver having a video signal IC, comprising: a scramble detection step of detecting whether scramble is applied to the selected broadcast signal; A channel switching step of switching channels by controlling the tuner when the scramble is applied to the detection result image and audio signal in the scramble detection step; A voice muting step of muting the voice signal by controlling the voice processing IC when the scramble is applied to the voice signal as a result of the detection in the scramble detection step; And a video blocking step of controlling the video processing IC to block the video signal when the detection result of the detection in the scramble detection step blocks the video signal. Treatment method. 안테나를 통해 수신된 방송신호의 채널을 선국하는 튜너와, 튜너로부터 선국되어 중간주파증폭된 방송신호중 음성신호를 처리하는 음성처리IC와, 튜너로부터 선국되어 중간주파증폭된 방송신호중 영상신호를 처리하는 영상처리IC를 구비한 TV 수신기에 있어서, 상기 선국된 방송신호에 대하여 스크램블이 걸려있는지 여부를 검파하여, 영상신호와 음성신호 모두에 대하여 스크램블이 걸쳐있는 경우에는 다른 채널을 선국하기 위한 제1제어신호, 음성신호에 대하여 스크램블이 걸쳐있는 경우에는 음성신호를 뮤트시키기 위한 제2제어신호, 영상신호에 대하여 스크램블이 걸쳐있는 경우에는 영상신호를 차단시키기 위한 제3제어신호를 출력하기 위한 스크램블 검파기 ; 및 상기 스크램블 검파기에서 출력되는 제1 내지 제3제어신호에 따라 상기 튜너, 음성처리 IC 및 영상처리 IC를 제어하기 위한 마이콤을 포함하는 것을 특징으로 하는 TV 수신기에 있어서 스크램블된 방송 수신시 신호처리회로.A tuner that tunes a channel of a broadcast signal received through an antenna, a voice processing IC that processes an audio signal among broadcast signals tuned from the tuner and an intermediate frequency amplified signal, and a video signal among broadcast signals tuned from the tuner and intermediate frequency amplified A TV receiver having an image processing IC, comprising: detecting whether or not scramble is applied to the selected broadcast signal, and when the scramble is applied to both the video signal and the audio signal, first control for tuning another channel. A scramble detector for outputting a second control signal for muting the audio signal when the scramble is applied to the signal and the audio signal, and a third control signal for blocking the video signal when the scramble is applied to the video signal; And a microcomputer for controlling the tuner, the voice processing IC, and the image processing IC according to the first to third control signals output from the scramble detector. . 제2항에 있어서, 상기 마이콤에 제1 내지 제3제어신호가 인가되면 해당하는 정보를 외부로 표시하기 위한 표시기를 더 구비하는 것을 특징으로 하는 TV 수신기에 있어서 스크램블된 방송 수신시 신호처리회로.3. The signal processing circuit of claim 2, further comprising an indicator for externally displaying corresponding information when the first to third control signals are applied to the micom. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950069168A 1995-12-30 1995-12-30 Apparatus and method of processing scramble-signal in a tv receiver KR100192787B1 (en)

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Application Number Priority Date Filing Date Title
KR1019950069168A KR100192787B1 (en) 1995-12-30 1995-12-30 Apparatus and method of processing scramble-signal in a tv receiver

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Application Number Priority Date Filing Date Title
KR1019950069168A KR100192787B1 (en) 1995-12-30 1995-12-30 Apparatus and method of processing scramble-signal in a tv receiver

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KR970057809A true KR970057809A (en) 1997-07-31
KR100192787B1 KR100192787B1 (en) 1999-06-15

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