KR950016350A - 에이치디 티브이의(hdtv)의 채널등화기 - Google Patents

에이치디 티브이의(hdtv)의 채널등화기 Download PDF

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Publication number
KR950016350A
KR950016350A KR1019930024644A KR930024644A KR950016350A KR 950016350 A KR950016350 A KR 950016350A KR 1019930024644 A KR1019930024644 A KR 1019930024644A KR 930024644 A KR930024644 A KR 930024644A KR 950016350 A KR950016350 A KR 950016350A
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South Korea
Prior art keywords
channel
coefficient value
coefficient
initialization
fir filter
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KR1019930024644A
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English (en)
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KR960012019B1 (ko
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김대진
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이헌조
엘지전자 주식회사
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Priority to KR1019930024644A priority Critical patent/KR960012019B1/ko
Priority to EP94402616A priority patent/EP0654944A1/en
Priority to US08/341,178 priority patent/US5654765A/en
Priority to CNB94120118XA priority patent/CN1149832C/zh
Publication of KR950016350A publication Critical patent/KR950016350A/ko
Application granted granted Critical
Publication of KR960012019B1 publication Critical patent/KR960012019B1/ko

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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
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/015—High-definition television systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L25/03012—Arrangements for removing intersymbol interference operating in the time domain
    • H04L25/03019—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception
    • H04L25/03057—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception with a recursive structure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/426—Internal components of the client ; Characteristics thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L2025/03433—Arrangements for removing intersymbol interference characterised by equaliser structure
    • H04L2025/03439—Fixed structures
    • H04L2025/03445—Time domain
    • H04L2025/03471—Tapped delay lines
    • H04L2025/03484—Tapped delay lines time-recursive
    • H04L2025/0349—Tapped delay lines time-recursive as a feedback filter
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L2025/03592—Adaptation methods
    • H04L2025/03598—Algorithms
    • H04L2025/03611—Iterative algorithms
    • H04L2025/03656—Initialisation
    • H04L2025/03662—Initialisation to a fixed value
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S348/00—Television
    • Y10S348/909—Noise responsive signal processing

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Picture Signal Circuits (AREA)
  • Filters That Use Time-Delay Elements (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

본 발명은 HDTV의 채널동화기에 관한 것으로, 다중경로에 의한 기호간 간섭이나 고스트를 제거하기 위해 필터링하는 채널등화수단(10), 및 상기 채널등화수단(10)에서 출력하는 각 채널에 해단하는 수렴된 계수값을 저장하고, 저장된 계수값을 초기화 계수값으로 사용할 수 있도록 상기 채널등화수단(10)으로 출력하는 초기화 계수값저장수단(11)을 포함하여 구성되는 것을 특징으로 한다. 따라서. 본 발명은 채널 별경시에 곧바로 화면이 출력되어 HDTV의 기능이 향상되는 효과가 있다.

Description

에이치디티브이(HDTV)의 채널등화기
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제 3 도는 본 발명에 의한 채널등화기의 구성도.
제 4 도는 제 3 도의 초기화 계수값 저장기의 구성도.
제 5 도는 본 발명에 의한 디지사이퍼에 적용된 채널등화기의 구성도.
제 6 도는 본 발명에 의한 DSC-HDTV에 적용된 채널등화기의 구성도.

Claims (7)

  1. 다중경로에 의한 기호간 간섭이나 고스트를 제거하기 위해 필터링하는 채널등화수단(10) 및 상기 채널등화수단(10)에서 출력하는 각 채널에 해당하는 수렴된 계수값을 저장하고 저장된 계수값을 초기화 계수값으로 사용할 수 있도록 상기 채널등화수단(10)으로 출력하는 초기화 계수값 저장수단(11)을 포함하여 구성되는 것을 특징으로 하는 HDTV의 채널등화기.
  2. 입력신호를 필터링하는 FIR 필터수단(15), 상기 FIR 필터수단(15)으로부터 출력되는 신호로부터 발생된 에러를 검출하는 에러발생수단(17), 상기 에러발생수단(17)으로부터 출력되는 신호와 입력신호를 이용하여 계수를 업데이트 계산하여 상기 FIR 필터수단(15)으로 출력하는 계수 업데이트 계산수단(16) 및 상기 계수 업데이트 계산수단(16)으로부터 출력되는 수렴된 계수값을 저장하고 상기 계수 업데이트 계산수단(16)으로 초기화 계수값을 출력하는 초기화 계수값 저장수단(18)을 포함하여 구성되는 것을 특징으로 하는 HDTV의 채널등화기.
  3. 입력신호를 필터링하는 피드포워드 FIR 필터수단(19), 채널등화기의 최종 출력신호를 슬라이싱하는 슬라이싱수단(22), 상기 슬라이싱수단(22)으로부터 출력되는 신호를 필터링하는 피드백 FIR 필터수단(21), 상기 피드포워드 FIR 필터수단(19)과 피드백 FIR 필터수단(21)으로부터 출력되는 신호를 가산하여 최종 출력하는 가산수단(20), 상기 가산수단(20)으로부터 출력되는 최종 출력신호로부터 발생된 에러를 검출하는 에러발생수단(23), 상기 에러발생수단(23)으로부터 출력되는 신호와 입력신호와 상기 슬라이싱수단(22)으로부터 출력되는 신호를 이용하여 계수를 업데이트 계산하여 상기 피드포워드 FIR 필터수단(19)과 피드백 FIR 필터수단(21)으로 출력하는 계수 업데이트 계산수단(24) 및 상기 계수 업데이트 계산수단(24)으로부터 출력되는 수렴된 계수값을 저장하고 상기 계수 업데이트 계산수단(24)으로 초기화 계수값을 출력하는 초기화 계수값 저장수단(25)을 포함하여 구성되는 것을 특징으로 하는 HDTV의 채널등화기.
  4. 제 1 항, 제 2 항 또는 제 3 항에 있어서, 상기 초기화 계수값 저장수단은 각 채널에 해당하는 초기화 계수값을 저장하는 초기화 계수값 저장 메모리수단(13) 및 상기 초기화 계수값 저장 메모리수단(13)이 채널번호의 입력에 따라 해당하는 초기화 계수값을 출력하도록 제어하는 메모리 제어수단(14)으로 구성되는 것을 특징으로 하는 HDTV의 채널등화기.
  5. 제 2 항 또는 제 3 항에 있어서, 상기 계수 업데이트 계산수단은 계산에 필요한 계수를 저장하는 계수저장수단을 포함하여 구성되는 것을 특징으로 하는 HDTV의 채널등화기.
  6. 제 4 항에 있어서, 상기 초기화 계수값 저장메모리수단(13)은 임의의 채널을 처음 켰을때 채널등화기가 동작할 수 있도록 하기 위해 최초의 계수값이 저장된 일반 사용 초기화 계수값 저장소(13a) 및 각 채널에 해당하는 초기화 계수값을 저장하는 다수의 해당 채널 계수값 저장소(13b, 13c, 13d…)로 구성되는 것을 특징으로 하는 HDTV의 채널등화기.
  7. 제 6 항에 있어서, 상기 해당 채널 계수값 저장소(13b, 13c, 13d…)는 82개로 이루어지는 것을 특징으로 하는 HDTV의 채널등화기.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019930024644A 1993-11-18 1993-11-18 에이치디티브이(hdtv)의 채널등화기 KR960012019B1 (ko)

Priority Applications (4)

Application Number Priority Date Filing Date Title
KR1019930024644A KR960012019B1 (ko) 1993-11-18 1993-11-18 에이치디티브이(hdtv)의 채널등화기
EP94402616A EP0654944A1 (en) 1993-11-18 1994-11-17 Channel equalizer for digital television receiver
US08/341,178 US5654765A (en) 1993-11-18 1994-11-18 Channel equalizer for digital television receiver having an initial coefficient storage unit
CNB94120118XA CN1149832C (zh) 1993-11-18 1994-11-18 用于数字电视接收机的频道平衡器

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019930024644A KR960012019B1 (ko) 1993-11-18 1993-11-18 에이치디티브이(hdtv)의 채널등화기

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KR950016350A true KR950016350A (ko) 1995-06-17
KR960012019B1 KR960012019B1 (ko) 1996-09-09

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US (1) US5654765A (ko)
EP (1) EP0654944A1 (ko)
KR (1) KR960012019B1 (ko)
CN (1) CN1149832C (ko)

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