KR940005143A - 스위칭 신호 처리 회로 - Google Patents

스위칭 신호 처리 회로 Download PDF

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Publication number
KR940005143A
KR940005143A KR1019930016661A KR930016661A KR940005143A KR 940005143 A KR940005143 A KR 940005143A KR 1019930016661 A KR1019930016661 A KR 1019930016661A KR 930016661 A KR930016661 A KR 930016661A KR 940005143 A KR940005143 A KR 940005143A
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KR
South Korea
Prior art keywords
signal
lpf
circuit
extender
vca
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Application number
KR1019930016661A
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English (en)
Other versions
KR100310356B1 (ko
Inventor
로우렌스 알빈 데이비드
Original Assignee
프레드릭 에이. 웨인
톰슨 콘슈머 일렉트로닉스, 인코오포레이티드
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Application filed by 프레드릭 에이. 웨인, 톰슨 콘슈머 일렉트로닉스, 인코오포레이티드 filed Critical 프레드릭 에이. 웨인
Publication of KR940005143A publication Critical patent/KR940005143A/ko
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Publication of KR100310356B1 publication Critical patent/KR100310356B1/ko

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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
    • H04N5/60—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals
    • H04N5/607—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals for more than one sound signal, e.g. stereo, multilanguages
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G7/00—Volume compression or expansion in amplifiers
    • H03G7/002—Volume compression or expansion in amplifiers in untuned or low-frequency amplifiers, e.g. audio amplifiers
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/038—Speech enhancement, e.g. noise reduction or echo cancellation using band spreading techniques
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G9/00—Combinations of two or more types of control, e.g. gain control and tone control
    • H03G9/02—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers
    • H03G9/025—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers frequency-dependent volume compression or expansion, e.g. multiple-band systems
    • 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
    • H04N5/455—Demodulation-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
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/008—Multichannel audio signal coding or decoding using interchannel correlation to reduce redundancy, e.g. joint-stereo, intensity-coding or matrixing

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computational Linguistics (AREA)
  • Quality & Reliability (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Networks Using Active Elements (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
  • Stereo-Broadcasting Methods (AREA)
  • Television Receiver Circuits (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Stereophonic System (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Storage Device Security (AREA)
  • Circuits Of Receivers In General (AREA)
  • Electronic Switches (AREA)

Abstract

본 발명은 DBX 압신 과정을 포함하는 BTSC 다중채널 사운드 시스템 표준에 따라 엔코딩된 음성 신호를 디코딩하기 위한 신장 회로에 관한 것이다. 본 발명에는 광대역 신장 회로(44)가 이용되고 상기 회로에는 DBX 신장기가 포함될 수 있다. 광대역 신장 회로에는 입력측 LPF(저역 필터)(48)를 갖는 신호 경로, 스테레오 차신호(L-R) 복조기(52), 제2LPF(10) 및 전압 제어 증폭기(VCA)(18)가 제공되는데, 상기 증폭기(VCA)(18)의 이득은 대역통과 필터(BPF)(20)와 적분 피크 검파기(54,56)에 의한 피복조차신호에서 유도된 제어 신호(58)에 의해 제어된다. VCA의 출력은 디엠퍼시스 네트워크(24)에 제공된 다음 스테레오 합신호(L+R)를 조합하여 원래의 L 및 R 신호로 재구성하는 디코더 매트릭스(38)에 공급된다. DBX 신장기(60)가 접속될 경우, 디엠퍼시스 네트워크(24)를 대신하여 DBCX 신장기(60)가 대체되고, 광대역 신장을 제공하는 VCV 제어 신호(58)가 소정의 전압에 의해 압도되며, BPF(20)는 무력하게 되고, 입력측 LPF(48)F를 바이패스하기 위해 입력단이 스위칭된다. 본 발명의 양상에 따라서, 무력하게 된 BPF(20)는 입력축 LPF(48)를 바이패스하기 위해 입력단에서의 스위칭을 동작시킨다.

Description

스위칭 신호 처리 회로
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 종래 기술인 DBX 신장기의 블록도,
제2도는 광대역 신장기의 블록도,
제3도는 BTSC 다중채널 사운드 능력을 갖는 텔레비젼 수신기의 블록도,
제4도는 본 발명의 양상에 따른 스테레오 차신호 프로세서의 블록도,
제5도는 제4도의 대역통과 필터 및 스위칭 장치를 세부적으로 도시한 블록도.

Claims (4)

  1. 신호를 스펙트럼식으로 필터링하는 주파수 감지 네트워크를 포함하는 필터 수단(20, 21a, 21b)을 구비하는데, 상기 주파수 감지 네트워크의 적어도 한 구성요소는 그 양단에 DC 전압이 걸리고, DC 전압의 진폭에 응답하는 출력 신호와, 한계 전압을 갖는 비교기 수단(66)과, 상기 비교기 수단(66)의 출력 신호에 응답하여 적어도 제1단자와 제2단자간을 스위칭하는 스위치수단(50)을 구비하는 것을 특징으로 하는 스위칭 장치.
  2. 제1항에 있어서, 상기 필터 수단단(20, 21a, 21b)은 대역 통과 필터인 것을 특징으로 하는 스위칭 장치.
  3. 제1항에 있어서, 상기 스위치 수단(50)은 한계 전압을 통해 DC전압을 변경하도록 주파수 감지 네트워크의 구성요소(21a)을 션트함으로써 동작하는 것을 특징으로 하는 스위칭 장치.
  4. 제3항에 있어서, 상기 주파수 감지 네트워크의 구성요소의 상기 션팅을 상기 필터 단에 의한 신호의 스펙트럼 필터링을 무력하게 하는 것을 특징으로 하는 스위칭 장치.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019930016661A 1992-08-28 1993-08-26 스위칭신호처리회로 KR100310356B1 (ko)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US07/936,682 1992-08-28
US7/936,682 1992-08-28
US07/936,682 US5377272A (en) 1992-08-28 1992-08-28 Switched signal processing circuit

Publications (2)

Publication Number Publication Date
KR940005143A true KR940005143A (ko) 1994-03-16
KR100310356B1 KR100310356B1 (ko) 2002-06-26

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019930016661A KR100310356B1 (ko) 1992-08-28 1993-08-26 스위칭신호처리회로

Country Status (11)

Country Link
US (2) US5377272A (ko)
EP (2) EP1083656B1 (ko)
JP (1) JP3138975B2 (ko)
KR (1) KR100310356B1 (ko)
CN (1) CN1043944C (ko)
CA (1) CA2100154C (ko)
DE (2) DE69333257T2 (ko)
ES (1) ES2204422T3 (ko)
MX (1) MX9305215A (ko)
MY (1) MY109281A (ko)
SG (1) SG55013A1 (ko)

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KR101335359B1 (ko) * 2004-08-17 2013-12-03 댓 코포레이션 텔레비전 오디오 신호를 처리하기 위한 설정가능한 재귀적디지털 필터
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JP5147851B2 (ja) * 2007-10-26 2013-02-20 株式会社ディーアンドエムホールディングス オーディオ信号補間装置及びオーディオ信号補間方法
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Also Published As

Publication number Publication date
EP0584718B1 (en) 2001-04-11
DE69330108D1 (de) 2001-05-17
DE69333257D1 (de) 2003-11-20
MY109281A (en) 1996-12-31
JP3138975B2 (ja) 2001-02-26
CN1085375A (zh) 1994-04-13
MX9305215A (es) 1994-05-31
DE69330108T2 (de) 2001-08-02
SG55013A1 (en) 1998-12-21
EP1083656A3 (en) 2002-01-23
EP1083656B1 (en) 2003-10-15
CA2100154A1 (en) 1994-03-01
ES2204422T3 (es) 2004-05-01
USRE40960E1 (en) 2009-11-10
CA2100154C (en) 1998-09-22
EP0584718A1 (en) 1994-03-02
JPH06216805A (ja) 1994-08-05
EP1083656A2 (en) 2001-03-14
KR100310356B1 (ko) 2002-06-26
DE69333257T2 (de) 2004-07-15
US5377272A (en) 1994-12-27
CN1043944C (zh) 1999-06-30

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