KR960012949A - Filter Coefficient Transmitter of Ghost Eliminator - Google Patents

Filter Coefficient Transmitter of Ghost Eliminator Download PDF

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Publication number
KR960012949A
KR960012949A KR1019940022378A KR19940022378A KR960012949A KR 960012949 A KR960012949 A KR 960012949A KR 1019940022378 A KR1019940022378 A KR 1019940022378A KR 19940022378 A KR19940022378 A KR 19940022378A KR 960012949 A KR960012949 A KR 960012949A
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KR
South Korea
Prior art keywords
filter coefficient
signal
vertical blanking
filter
control signal
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Application number
KR1019940022378A
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Korean (ko)
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KR100209876B1 (en
Inventor
김기범
Original Assignee
김광호
삼성전자 주식회사
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Application filed by 김광호, 삼성전자 주식회사 filed Critical 김광호
Priority to KR1019940022378A priority Critical patent/KR100209876B1/en
Publication of KR960012949A publication Critical patent/KR960012949A/en
Application granted granted Critical
Publication of KR100209876B1 publication Critical patent/KR100209876B1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/21—Circuitry for suppressing or minimising disturbance, e.g. moiré or halo
    • H04N5/211—Ghost signal cancellation
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H15/00—Transversal filters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
    • H04N7/087—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only
    • H04N7/088—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only the inserted signal being digital
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H2218/00—Indexing scheme relating to details of digital filters
    • H03H2218/02—Coefficients

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Picture Signal Circuits (AREA)

Abstract

본 발명은 TV신호의 지상방송 전송중 반사파에 의해 발생되는 고스트를 제거하기 위한 고스트 제거기의 필터계수 전송장치에 관한것으로, 본 발명인 필터계수 전송장치는 디지털 신호 처리기와 트랜스버설 디지털 필터사이에 위치하여, 복합동기신호로부터 수직블랭킹신호만을 분리해내는 수직블랭킹기와; 이렇게 분리된 수직 블랭킹신호내의 수직동기신호에 동기된 필터계수 전송제어신호를 발생시키는 제어신호 발생기와; 분리된 수직블랭킹신호에 따라 디지털 신호 처리기로부터 출력되는 필터계수를 완충시키는 필터계수 완충부와; 제어신호 발생기에서 발생된 필터계수 전송제어 신호에 따라 수직블랭킹기간중에만 필터계수를 전송하는 필터게수 랫치부를 포함하여, 필터 계수들을 영상신호의 수직블랭킹 기간동안에만 전송함으로써 필터 계수 전송에 따른 화면의 깜박거림이나 노이즈등에 의 한 순간적인 화질열화현탕을 방지한다.The present invention relates to a filter coefficient transmission device of a ghost eliminator for removing ghosts generated by reflected waves during the terrestrial broadcast transmission of a TV signal. The filter coefficient transmission device of the present invention is located between a digital signal processor and a transversal digital filter. A vertical blanking unit for separating only the vertical blanking signal from the composite synchronous signal; A control signal generator for generating a filter coefficient transmission control signal synchronized with the vertical synchronization signal in the vertical blanking signal thus separated; A filter coefficient buffer for buffering the filter coefficient output from the digital signal processor according to the separated vertical blanking signal; In accordance with the filter coefficient transmission generated by the control signal generator, the filter coefficient latch unit transmits the filter coefficient only during the vertical blanking period, and transmits the filter coefficients only during the vertical blanking period of the video signal. Prevents instantaneous image quality deterioration caused by flickering or noise.

Description

고스트 제거기의 필터계수 전송장치Filter Coefficient Transmitter of Ghost Eliminator

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

제2도는 본 발명 인 필터 계수 전송장치의 제1실시예를 나타낸 블럭도.2 is a block diagram showing a first embodiment of the filter coefficient transmission apparatus of the present invention.

제3도는 본 발명 인 필터 계수 전송장치의 제1실시예에 대한 각 부 파형도.3 is each sub waveform diagram of the first embodiment of the filter coefficient transmission device of the present invention.

제4도는 본 발명 인 필터 계수 전송장치의 제2실리 예를 나타낸 블럭도.4 is a block diagram showing a second practical example of the filter coefficient transmission device of the present invention.

Claims (4)

고스트 제거 장치내의 디지털 신호 처리기로부터 트랜스버설 디지털 필터로 필터계수를 전송하는 장치에 있어서, 영상신호의 복합동기신호로부터 수직블랭킹신호만을 분리 해내는 수직블랭킹분리기와 ; 수직블랭킹신호로부터 순직동시신호에 동기된 필턴계수 전송제어신호를 발생시키는 제어신호 발생기와; 디지털신호처리기로부터 출력되는 필터계수를 완충시키는 필터계수 완충부와; 완충된 필터계수를 필터계수 전송제어신호 발생기에 따라 수직 블랭킹신호 기간에만 전송하고 그외 기간에는 전송을 방지하는 필터계수 랫치부를 포함하는 것을 특징으로 하는 고스트 제거기의 필터계수 전송장치.An apparatus for transmitting filter coefficients from a digital signal processor in a ghost elimination device to a transversal digital filter, comprising: a vertical blanking separator for separating only a vertical blanking signal from a composite synchronous signal of a video signal; A control signal generator for generating a filter coefficient transmission control signal synchronized with the forward simultaneous signal from the vertical blanking signal; A filter coefficient buffer for buffering the filter coefficient output from the digital signal processor; And a filter coefficient latch for transmitting the buffered filter coefficient only in the vertical blanking signal period and preventing the transmission in other periods according to the filter coefficient transmission control signal generator. 제1항에 있어서, 상기 필터 계수 완충부를 저수준능동(Low Level Active)인 것을 사용하여 수직블랭킹신호가 저수준(Low Level)일때만, 필터계수들이 필터계수 완충부를 통과하게 하는 것을 특징으로 하는 고스트 제저기 의 필터계수 전송장치.The ghost agent according to claim 1, wherein the filter coefficients pass through the filter coefficient buffer only when the vertical blanking signal is at a low level by using the filter coefficient buffer as low level active. There is a filter coefficient transmission device. 제1항에 있어서, 상기 필터계수 완충부를 고수준능동(High Level Active)인 것을 사용하고 상기 수직블랭킹기와 필터계수 완충부사이에 반전기가 부가되어 반전된 수직블랭킹신호가 고수준(High Level)일때만, 필터계수들이 필터계수 완충부를 통과하게 하는 것을 특징으로 하는 고스트 제거기의 필터계수 전송장치.2. The filter according to claim 1, wherein the filter coefficient buffer unit is of high level active and the filter is only used when the inverted vertical blanking signal is high level by adding an inverter between the vertical blanking unit and the filter coefficient buffer unit. Filter coefficient transmission device of the ghost eliminator, characterized in that the coefficients pass through the filter coefficient buffer. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940022378A 1994-09-06 1994-09-06 Device for transmitting filter coefficient of ghost canceller KR100209876B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940022378A KR100209876B1 (en) 1994-09-06 1994-09-06 Device for transmitting filter coefficient of ghost canceller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019940022378A KR100209876B1 (en) 1994-09-06 1994-09-06 Device for transmitting filter coefficient of ghost canceller

Publications (2)

Publication Number Publication Date
KR960012949A true KR960012949A (en) 1996-04-20
KR100209876B1 KR100209876B1 (en) 1999-07-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019940022378A KR100209876B1 (en) 1994-09-06 1994-09-06 Device for transmitting filter coefficient of ghost canceller

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KR100209876B1 (en) 1999-07-15

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