KR940004437A - Sound card noise prevention device - Google Patents

Sound card noise prevention device Download PDF

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Publication number
KR940004437A
KR940004437A KR1019920013910A KR920013910A KR940004437A KR 940004437 A KR940004437 A KR 940004437A KR 1019920013910 A KR1019920013910 A KR 1019920013910A KR 920013910 A KR920013910 A KR 920013910A KR 940004437 A KR940004437 A KR 940004437A
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KR
South Korea
Prior art keywords
noise
signal
buffer
supplying
voice
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Application number
KR1019920013910A
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Korean (ko)
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KR950003878B1 (en
Inventor
김옥중
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강경석
주식회사 한화통신
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Priority to KR1019920013910A priority Critical patent/KR950003878B1/en
Publication of KR940004437A publication Critical patent/KR940004437A/en
Application granted granted Critical
Publication of KR950003878B1 publication Critical patent/KR950003878B1/en

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    • 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
    • G10L21/0208—Noise filtering
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/16—Sound input; Sound output
    • G06F3/162—Interface to dedicated audio devices, e.g. audio drivers, interface to CODECs

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Acoustics & Sound (AREA)
  • Quality & Reliability (AREA)
  • Computational Linguistics (AREA)
  • General Health & Medical Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Noise Elimination (AREA)

Abstract

본 발명은 범용 컴퓨터등의 본체와 연결되어 본체에서 전송되는 음성데이타 및 제어데이타에 따라 음성을 출력하는 음성카드에서 음성 및 제어신호에 노이즈성분이 혼입되는 것을 방지하기 위한 노이즈방지장치에 관한 것으로, 슈미트트리거회로 또는 TTL회로로 구성된 복수개의 버피를 구비하여, 카드의 각 부를 리세트시키는 리세트신호와, 각 부에 클록신호를 제공하는 국부발진신호와, 동기 및 명령의 순서를 제어하기 위한 카운터의 출력신호에 포함된 노이즈성분을 각각제거하고, 외부에서 인가되는 전원전압에 포함된 리플성분을 제거함으로써, 음성카드의 각 부의 동작에 에러가 발생하는것을 방지함과 아울러 출력되는 음성의 질을 보다 향상시킬 수 있다.The present invention relates to a noise prevention device for preventing noise components from being mixed in a voice and a control signal in a voice card which is connected to a main body such as a general-purpose computer and outputs a voice according to the voice data and control data transmitted from the main body. A counter for controlling a sequence of reset signals for resetting each part of the card, a local oscillation signal for providing a clock signal to each part, and a plurality of buffy comprising a schmitt trigger circuit or a TTL circuit. By removing the noise components included in the output signal of each and removing the ripple components included in the power supply voltage applied from the outside, it is possible to prevent errors in the operation of each part of the sound card and to improve the quality of the output audio. It can improve more.

Description

음성카드의 노이즈방지장치Sound card noise prevention device

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

제1도는 본 발명에 의한 음성카드의 노이즈방지장치의 일 실시예를 나타내는 블록도.1 is a block diagram showing an embodiment of an apparatus for preventing noise of a sound card according to the present invention;

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

11 : 인터페이스용 프로세서 12 : 복조부11 processor for interface 12 demodulator

13 : 필터 14 : 증폭부13 filter 14 amplification unit

15 : 스피커 16 : 국부발진부15 speaker 16 local oscillation unit

17 : 카운터17: counter

Claims (5)

본체의 제어부와 음성데이타 및 제어데이타를 송수신하는 인터페이스용 프로세서와, 변조된 음성데이타를 복조하기 위한 복조부와, 복조부에서 출력되는 음성신호를 소정의 주파수대역으로 필터링하여 스피커로 공급하는 필터와, 동기 및 명령순서를 제어하기 위한 카운터와, 시스템의 각 부에 클록을 공급하기 위한 국부발진부를 구비한 음성카드에서, 상기 본체에서 전송되는 리세트신호를 공급받아 이 리세트신호에 혼입된 노이즈성분을 제거하고 각 부의 리세트단자로 노이즈성분이 제거된 리세트신호를 공급하기위한 제1버퍼; 상기 국부발진부에서 출력되는 발진신호를 공급받아 이 발진신호에 혼입된 노이즈성분을 제거하고, 각 부의 클록단자로 노이즈성분이 제거된 발진신호를 공급하기 위한 제2버퍼; 상기 카운터에서 출력되는 카운팅신호를 공급받아 이 카운팅신호에 혼입된 노이즈성분을 제거하고, 상기 각 부의 소정 단자로 노이즈성분이 제거된 카운팅신호를 공급하기 위한 제3버퍼; 및 상기 음성카드로 인가되는 전원전압의 입력단자에 결합되어 이 전원전압에 혼입된 노이즈성분을 제거하기 위한 수단을 포함하는 것을 특징으로 하는 음성카드의 노이즈방지장치.An interface processor for transmitting and receiving voice data and control data to the control unit of the main body, a demodulator for demodulating the modulated voice data, a filter for filtering the voice signal output from the demodulator to a predetermined frequency band and supplying the speaker to a speaker; And a noise signal incorporated in the reset signal by receiving the reset signal transmitted from the main body in a voice card including a counter for controlling synchronization and command sequence, and a local oscillator for supplying a clock to each part of the system. A first buffer for removing a component and supplying a reset signal from which a noise component is removed to each reset terminal; A second buffer receiving the oscillation signal output from the local oscillation unit to remove noise components mixed in the oscillation signal, and supplying an oscillation signal from which noise components are removed to the clock terminals of each unit; A third buffer receiving the counting signal output from the counter to remove the noise component mixed with the counting signal, and supplying a counting signal from which the noise component is removed to a predetermined terminal of each unit; And means for removing noise components mixed with the input terminal of the power supply voltage applied to the sound card. 제1항에 있어서, 상기 제1버퍼는 입력되는 리세트신호에서 소정의 기준레벨 이상 또는 이하에 존재하는 노이즈성분을 제거하기 위한 슈미트트리거회로인 것을 특징으로 하는 음성카드의 노이즈방지장치.2. The noise preventing device of claim 1, wherein the first buffer is a schmitt trigger circuit for removing noise components present above or below a predetermined reference level from an input reset signal. 제1항에 있어서, 상기 제2버퍼는 입력되는 발진신호에 혼입된 노이즈성분을 제거하기 위한 트랜지스터-트랜지스터 논리회로인 것을 특징으로 하는 음성카드의 노이즈방지장치.2. The noise preventing device of claim 1, wherein the second buffer is a transistor-transistor logic circuit for removing noise components incorporated in an input oscillation signal. 제1항에 있어서, 상기 제3버퍼는 입력되는 카운팅신호에 혼입된 노이즈성분을 제거하기 위한 트랜지스터-트랜지스터 논리회로인 것을 특징으로 하는 음성카드의 노이즈방지장치.The noise preventing device of claim 1, wherein the third buffer is a transistor-transistor logic circuit for removing noise components mixed in an input counting signal. 제1항에 있어서, 상기 전원전압의 노이즈 제거수단은 입력되는 전원전압에 포함된 소정의 리플성분을 제거하기 위한 하나 또는 하나 이상의 캐패시터인 것을 특징으로 하는 음성카드의 노이즈방지장치.2. The noise preventing device of claim 1, wherein the noise removing means of the power supply voltage is one or more capacitors for removing a predetermined ripple component included in the input power supply voltage. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019920013910A 1992-08-03 1992-08-03 A device checking noise in voice card KR950003878B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019920013910A KR950003878B1 (en) 1992-08-03 1992-08-03 A device checking noise in voice card

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019920013910A KR950003878B1 (en) 1992-08-03 1992-08-03 A device checking noise in voice card

Publications (2)

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KR940004437A true KR940004437A (en) 1994-03-15
KR950003878B1 KR950003878B1 (en) 1995-04-20

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KR1019920013910A KR950003878B1 (en) 1992-08-03 1992-08-03 A device checking noise in voice card

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6340866B1 (en) 1998-02-05 2002-01-22 Lg Electronics Inc. Plasma display panel and driving method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6340866B1 (en) 1998-02-05 2002-01-22 Lg Electronics Inc. Plasma display panel and driving method thereof

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Publication number Publication date
KR950003878B1 (en) 1995-04-20

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