KR970701410A - 음성 부호화 방법(Sound Encoding System) - Google Patents

음성 부호화 방법(Sound Encoding System)

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Publication number
KR970701410A
KR970701410A KR1019960704546A KR19960704546A KR970701410A KR 970701410 A KR970701410 A KR 970701410A KR 1019960704546 A KR1019960704546 A KR 1019960704546A KR 19960704546 A KR19960704546 A KR 19960704546A KR 970701410 A KR970701410 A KR 970701410A
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KR
South Korea
Prior art keywords
term prediction
short
prediction value
signal
speech
Prior art date
Application number
KR1019960704546A
Other languages
English (en)
Inventor
마사유끼 니시구찌
Original Assignee
이데이 노부유끼
소니 가부시끼가이샤
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 이데이 노부유끼, 소니 가부시끼가이샤 filed Critical 이데이 노부유끼
Publication of KR970701410A publication Critical patent/KR970701410A/ko

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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L13/00—Speech synthesis; Text to speech systems
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; 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
    • G10L19/04—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 using predictive techniques
    • G10L19/06—Determination or coding of the spectral characteristics, e.g. of the short-term prediction coefficients
    • G10L19/07—Line spectrum pair [LSP] vocoders
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; 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
    • G10L19/04—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 using predictive techniques
    • G10L19/08—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters
    • G10L19/12—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters the excitation function being a code excitation, e.g. in code excited linear prediction [CELP] vocoders
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; 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
    • G10L19/04—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 using predictive techniques
    • G10L19/16—Vocoder architecture
    • G10L19/18—Vocoders using multiple modes
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; 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
    • G10L19/04—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 using predictive techniques
    • G10L19/08—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters
    • G10L19/09—Long term prediction, i.e. removing periodical redundancies, e.g. by using adaptive codebook or pitch predictor
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; 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
    • G10L2019/0001—Codebooks
    • G10L2019/0004—Design or structure of the codebook
    • G10L2019/0005—Multi-stage vector quantisation
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
    • G10L25/03—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters
    • G10L25/24—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters the extracted parameters being the cepstrum

Abstract

본 발명에서는 예를 들어 부호 여기 선형 예측(CELP)부호화를 행할 때에, 입력된 음성 신호로부터 선형예측 부호(LPC)분석 회로(12)에서 α파라메터를 취출하여 α→LSP변환 회로(13)에서 α파라메터를 선 스펙트럼쌍(LSP)파라메터로 변환하고, 이 선 스펙트럼쌍(LSP)파라메터 벡터를 LSP벡터 양자화기(14)에서 벡터 양자화한다. 이때, 피치 검출 회로(22)에 의해 검출된 피치의 값에 따라 전환 스위치(16)을 제어하여 남자 음성용 코드북(15M)과 여자 음성용 코드북(15M)중 어느 한쪽을 선택하여 사용함으로써 전송 비트 레이트를 증대시키지 않고 양자화 특성을 향상시킬 수 있다.

Description

음성 부호화 방법(Sound Encoding System)
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명에 따른 음성 부호화 방법이 적용되는 장치의 구체예로서의 음성 신호 부호화 장치의 개략구성을 도시한 블럭도이다.

Claims (7)

  1. 입력 음성 신호에 근거하여 단기 예측값을 생성하는 단계와; 음성 신호의 복수의 특성 파라메터 중 하나 또는 복수의 조합을 지준 파라메터로 하고, 상기 기준 파라메터에 관하여 단기 예측값을 나타내는 파라메터를 분류하여 형성한 제1 및 제2의 코드북을 작성하는 단계와; 상기 입력 음성 신호의 상기 기준 파라메터에 관하여 상기 제1 및 제2의 코드북의 한쪽을 선택하는 단계; 및 상기 선택한 코드북을 참조하여 상기 단기 예측값을 양자화함으로써 상기 입력음성 신호를 부호화하는 단계를 포함하는 것을 특징으로 하는 음성 부호화 방법.
  2. 제1항에 있어서, 상기 단기 예측값은 단기 예측 계수인 것을 특징으로 하는 음성 부호화 방법.
  3. 제1항에 있어서, 상기 단기 예측값은 단기 예측 오차인 것을 특징으로 하는 음성 부호화 방법.
  4. 제1항에 있어서, 상기 복수의 특성 파라메터는 음성 신호의 피치값, 피시 강도, 프레임 파워, 유성음 및 무성음의 판별 플래그 및 신호 스펙트럼의 기울기인 것을 특징으로 하는 음성 부호화 방법.
  5. 제1항에 있어서, 상기 단기 예측값을 베터 양자화함으로써, 상기 입력 음성 신호를 부호화하는 것을 특징으로 하는 음성 부호화 방법.
  6. 제1항에 있어서, 상기 단기 예측값을 매트릭스 양자화함으로써, 상기 입력 음성 신호를 부호화하는 것을 특징으로 하는 음성 부호화 방법.
  7. 제1항에 있어서, 상기 기준 파라메터는 음성 신호의 피치값이고, 상기 입력 음성 신호의 피치값 및 소성의 피치값의 크기의 관계에 따라서 상기 제1 및 제2의 코드북의 한쪽을 선택하는 것을 특징으로 하는 음성 부호화 방법.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019960704546A 1994-12-21 1995-12-19 음성 부호화 방법(Sound Encoding System) KR970701410A (ko)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP6318689A JPH08179796A (ja) 1994-12-21 1994-12-21 音声符号化方法
JP94-318689 1994-12-21
PCT/JP1995/002607 WO1996019798A1 (fr) 1994-12-21 1995-12-19 Systeme de codage du son

Publications (1)

Publication Number Publication Date
KR970701410A true KR970701410A (ko) 1997-03-17

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KR1019960704546A KR970701410A (ko) 1994-12-21 1995-12-19 음성 부호화 방법(Sound Encoding System)

Country Status (16)

Country Link
US (1) US5950155A (ko)
EP (1) EP0751494B1 (ko)
JP (1) JPH08179796A (ko)
KR (1) KR970701410A (ko)
CN (1) CN1141684A (ko)
AT (1) ATE233008T1 (ko)
AU (1) AU703046B2 (ko)
BR (1) BR9506841A (ko)
CA (1) CA2182790A1 (ko)
DE (1) DE69529672T2 (ko)
ES (1) ES2188679T3 (ko)
MY (1) MY112314A (ko)
PL (1) PL316008A1 (ko)
TR (1) TR199501637A2 (ko)
TW (1) TW367484B (ko)
WO (1) WO1996019798A1 (ko)

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AU4190196A (en) 1996-07-10
AU703046B2 (en) 1999-03-11
CN1141684A (zh) 1997-01-29
EP0751494A1 (en) 1997-01-02
CA2182790A1 (en) 1996-06-27
JPH08179796A (ja) 1996-07-12
ES2188679T3 (es) 2003-07-01
PL316008A1 (en) 1996-12-23
MY112314A (en) 2001-05-31
EP0751494B1 (en) 2003-02-19
US5950155A (en) 1999-09-07
TR199501637A2 (tr) 1996-07-21
DE69529672D1 (de) 2003-03-27
BR9506841A (pt) 1997-10-14
TW367484B (en) 1999-08-21
WO1996019798A1 (fr) 1996-06-27
DE69529672T2 (de) 2003-12-18
MX9603416A (es) 1997-12-31
ATE233008T1 (de) 2003-03-15
EP0751494A4 (en) 1998-12-30

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