KR890016792A - Pcm에서의 아나로그 신호합성장치 - Google Patents

Pcm에서의 아나로그 신호합성장치 Download PDF

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Publication number
KR890016792A
KR890016792A KR1019890004866A KR890004866A KR890016792A KR 890016792 A KR890016792 A KR 890016792A KR 1019890004866 A KR1019890004866 A KR 1019890004866A KR 890004866 A KR890004866 A KR 890004866A KR 890016792 A KR890016792 A KR 890016792A
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South Korea
Prior art keywords
pcm
pcm data
analog signal
data
channel
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KR1019890004866A
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English (en)
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KR970002239B1 (en
Inventor
도루 오까와
세이찌 사또
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나까무라 마사야
가부시끼가이샤 나무꼬
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H7/00—Instruments in which the tones are synthesised from a data store, e.g. computer organs
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H2250/00—Aspects of algorithms or signal processing methods without intrinsic musical character, yet specifically adapted for or used in electrophonic musical processing
    • G10H2250/131—Mathematical functions for musical analysis, processing, synthesis or composition
    • G10H2250/165—Polynomials, i.e. musical processing based on the use of polynomials, e.g. distortion function for tube amplifier emulation, filter coefficient calculation, polynomial approximations of waveforms, physical modeling equation solutions
    • G10H2250/195—Lagrange polynomials, e.g. for polynomial interpolation or cryptography
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H2250/00—Aspects of algorithms or signal processing methods without intrinsic musical character, yet specifically adapted for or used in electrophonic musical processing
    • G10H2250/541—Details of musical waveform synthesis, i.e. audio waveshape processing from individual wavetable samples, independently of their origin or of the sound they represent
    • G10H2250/545—Aliasing, i.e. preventing, eliminating or deliberately using aliasing noise, distortions or artifacts in sampled or synthesised waveforms, e.g. by band limiting, oversampling or undersampling, respectively
    • 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
    • Y10S84/00—Music
    • Y10S84/09—Filtering

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Analogue/Digital Conversion (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Noise Elimination (AREA)

Abstract

내용 없음

Description

PCM에서의 아나로그 신호합성장치
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제 1 도는 본 발정에 관한 PCM에서의 아날로그 신호 합성장치의 적합한 실기예를 나타낸 블럭회로도. 제 2 도는 오버 샘플링 처리의 한예를 나타내는 설명도로서, 도면에서(A)는 오버 샘플링 처리를 실시하기 전의 각 채널의 PCM 데이터의 주파수 스펙트럼도, 노면에서(B)는 오버 샘플링 처리를 실시한 되의 주파수 스펙트럼도. 제 3 도는 본 발명이 적용된 아날로그 신호 합성장치의 전체 설명도.

Claims (2)

  1. 복수의 아나로그 신호를 다른 샘플링 주파수로 심플링 된 PCM 데이터로서 기억될 파형 메모리를 포함하고 이 파형 메모리에서 여러 채널분의 PCM 데이터를 리드하여 아나로그 신호를 합성하는 PCM에서의 아나로그 합성 장치에 있어서, 파형 데이터에서 리드되는 각 채널의 PCM 데이터으 샘플링 주파수를 고주파측에 시프트 시키는 오버샘플링 장치와, 오버 샐플링 처리된 각 채널의 PCM 데이터를 가산하는 장치와, 가산된 데이터를 아날로그 신호로 변화하는 DA 변화장치와, 고주파측에 시프트된 샘플링 주파수에 의거하여 컷오프 주파수가 설정되고, 합성된 아나로그 신호에서 PCM 데이터에 포함되는 반복 노이즈를 제지하는 로우패스 필터를 포함하며, 각 채널의 PCM 데이터에 포함되는 반복 노이즈의 제거를 공통의 로우패스 필터로 행하는 것을 특징으로 하는 PCM에서의 아날로그 신호 합성장치.
  2. 제 1 항에 있어서, 오버 샘플링 장치는 파형 메모리에서 리드지는 각 채널의 PCM 데이터를 n차 보완(단, n은 정수)하고, 각 PCM 데이터의 샘플링 주파수를 고주파측으로 시프트 시키도록 형성된 것을 특징으르 하는 PCM에서의 아날로그 신호 합성장치.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR89004866A 1988-04-13 1989-04-13 Apparatus for synthesizing analog signals in pcm KR970002239B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP?63-90575 1988-04-13
JP63090575A JP2970907B2 (ja) 1988-04-13 1988-04-13 Ｐｃｍにおけるアナログ信号合成装置

Publications (2)

Publication Number Publication Date
KR890016792A true KR890016792A (ko) 1989-11-30
KR970002239B1 KR970002239B1 (en) 1997-02-26

Family

ID=14002226

Family Applications (1)

Application Number Title Priority Date Filing Date
KR89004866A KR970002239B1 (en) 1988-04-13 1989-04-13 Apparatus for synthesizing analog signals in pcm

Country Status (7)

Country Link
US (1) US5050474A (ko)
EP (1) EP0337458B1 (ko)
JP (1) JP2970907B2 (ko)
KR (1) KR970002239B1 (ko)
CA (1) CA1309775C (ko)
DE (1) DE68912380T2 (ko)
ES (1) ES2050176T3 (ko)

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US6222525B1 (en) 1992-03-05 2001-04-24 Brad A. Armstrong Image controllers with sheet connected sensors
US6347997B1 (en) 1997-10-01 2002-02-19 Brad A. Armstrong Analog controls housed with electronic displays
US6344791B1 (en) 1998-07-24 2002-02-05 Brad A. Armstrong Variable sensor with tactile feedback
FR2704110B1 (fr) * 1993-04-16 1995-07-13 Balestro Freddy Dispositif de traitement de signaux utilisant plusieurs filtrages differents, notamment pour le codage audiofrequence de signaux vocaux.
WO1996002977A1 (en) * 1994-07-13 1996-02-01 Stanford Telecommunications, Inc. Method and apparatus for alias-driven frequency downconversion (mixing)
DE69623866T2 (de) * 1995-06-19 2003-05-28 Yamaha Corp Verfahren und Vorrichtung zur Bildung einer Tonwellenform durch kombinierte Verwendung von verschiedenen Auflösungen der Abtastwerte der Wellenformen
JP3658826B2 (ja) * 1995-12-21 2005-06-08 ヤマハ株式会社 楽音生成方法
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Also Published As

Publication number Publication date
JPH01261909A (ja) 1989-10-18
US5050474A (en) 1991-09-24
DE68912380T2 (de) 1994-08-11
CA1309775C (en) 1992-11-03
ES2050176T3 (es) 1994-05-16
EP0337458B1 (en) 1994-01-19
JP2970907B2 (ja) 1999-11-02
DE68912380D1 (de) 1994-03-03
KR970002239B1 (en) 1997-02-26
EP0337458A2 (en) 1989-10-18
EP0337458A3 (en) 1990-11-28

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