KR20080077032A - 직교화 탐색 방법 및 음성 부호화기 - Google Patents
직교화 탐색 방법 및 음성 부호화기 Download PDFInfo
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- 239000013598 vector Substances 0.000 claims abstract description 526
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- G—PHYSICS
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- 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
- G10L19/04—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
- G10L19/10—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters the excitation function being a multipulse excitation
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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
- 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
- G10L19/10—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters the excitation function being a multipulse excitation
- G10L19/107—Sparse pulse excitation, e.g. by using algebraic codebook
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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
- 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
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Abstract
Description
Claims (2)
- 탐색 기준치(search reference value)를 산출함으로써 음성 부호화에 이용하기 위한 직교화 탐색 방법으로서,피치 성분(pitch component)을 나타내는 적응 코드 벡터를 생성하는 단계와,잡음 성분(random component)을 나타내는 잡음 코드 벡터를 생성하는 단계와,상기 적응 코드 벡터와 상기 잡음 코드 벡터에 의해 여기되는 합성 필터에 의해 합성 음성 신호를 생성하는 단계와,입력 음성 신호와 합성 음성 신호 사이의 왜곡(distortion)을 계산하는 단계와,상기 왜곡을 최소화하는 하나의 잡음 코드 벡터를 선택하는 단계를 포함하되,상기 적응 코드 벡터를 이용하여 합성 필터에서 합성에 의해 얻어진 신호 Hp의 파워 a=ptHtHp를 계산하는 단계와,상기 합성 필터의 필터 계수의 자기상관 행렬(auto-correlation matrix), A=HtH를 계산하는 단계와,상기 적응 코드 벡터를 이용해 상기 합성 필터에서 합성에 의해 얻어진 신호 Hp에 대해 시간 역순화 합성(time reverse synthesis)하여, 그 결과 얻어진 신호 rt=ptHtH의 외적(outer product) M=rrt을 취해 행렬 M을 계산하는 단계와,파워 a, 자기상관 행렬 A, 행렬 M 및 잡음 코드 벡터 c를 이용하여 1/D=1/{ct(aA-M)c} 값을 계산하는 단계와,1/D 값을 이용하여 탐색 기준치를 계산하는 단계에 의해 탐색 기준치를 산출하는 것을 특징으로 하며, 여기서 p는 적응 코드 벡터, c는 잡음 코드 벡터, H는 합성 필터 계수 행렬, t는 전치(transpose)를 의미하는직교화 탐색 방법.
- 탐색 기준치를 산출함으로써 직교화 탐색을 이용하는 음성 부호화기로서,피치 성분(pitch component)을 나타내는 적응 코드 벡터를 생성하는 적응 코드북(adaptive codebook)과,잡음 성분(random component)을 나타내는 잡음 코드 벡터를 생성하는 잡음 코드북과,상기 적응 코드 벡터와 상기 잡음 코드 벡터에 의해 여기되어, 합성 음성 신호를 생성하는 합성 필터와,입력 음성 신호와 합성 음성 신호 사이의 왜곡(distortion)을 계산하고 상기 왜곡을 최소화하는 하나의 잡음 코드 벡터를 선택하는 왜곡 계산부를 포함하되,탐색 기준치를 계산하는 상기 왜곡 계산부는상기 적응 코드 벡터를 이용하여 상기 합성 필터에서 합성에 의해 얻어진 신호 Hp의 파워 a=ptHtHp를 계산하고, 상기 합성 필터의 필터 계수의 자기상관 행렬(auto-correlation matrix), A=HtH를 계산하는 시스템과,상기 적응 코드 벡터를 이용해 상기 합성 필터에서 합성에 의해 얻어진 신호 Hp에 대해 시간 역순화 합성하여, 그 결과 얻어진 신호 rt=ptHtH의 외적(outer product) M=rrt을 취해 행렬 M을 계산하는 시스템과,파워 a, 자기상관 행렬 A, 행렬 M 및 잡음 코드 벡터 c를 이용하여 1/D=1/{ct(aA-M)c} 값을 계산하는 시스템을 포함하고,상기 왜곡 계산부는 1/D 값을 이용하여 탐색 기준치를 계산하고, 여기서 p는 적응 코드 벡터, c는 잡음 코드 벡터, H는 합성 필터 계수 행렬, t는 전치(transpose)를 의미하는음성 부호화기.
Applications Claiming Priority (7)
Application Number | Priority Date | Filing Date | Title |
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JPJP-P-1997-00289412 | 1997-10-22 | ||
JP28941297A JP3235543B2 (ja) | 1997-10-22 | 1997-10-22 | 音声符号化/復号化装置 |
JPJP-P-1997-00295130 | 1997-10-28 | ||
JP29513097A JP3175667B2 (ja) | 1997-10-28 | 1997-10-28 | ベクトル量子化法 |
JP08571798A JP3174756B2 (ja) | 1998-03-31 | 1998-03-31 | 音源ベクトル生成装置及び音源ベクトル生成方法 |
JPJP-P-1998-00085717 | 1998-03-31 | ||
KR1020077016452A KR100938018B1 (ko) | 1997-10-22 | 1998-10-22 | 확산 벡터 발생기 및 확산 벡터 발생 방법 |
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KR1020077016452A Division KR100938018B1 (ko) | 1997-10-22 | 1998-10-22 | 확산 벡터 발생기 및 확산 벡터 발생 방법 |
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KR20080077032A true KR20080077032A (ko) | 2008-08-20 |
KR100872246B1 KR100872246B1 (ko) | 2008-12-05 |
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KR1020077016451A KR100886062B1 (ko) | 1997-10-22 | 1998-10-22 | 확산 펄스 벡터 생성 장치 및 방법 |
KR1019997005510A KR100651438B1 (ko) | 1997-10-22 | 1998-10-22 | 음성 부호화 장치, celp 음성 부호화 방법, 대수적 구조 음원의 직교화 탐색 방법 |
KR1020087018788A KR100925084B1 (ko) | 1997-10-22 | 1998-10-22 | 음성 부호화기 및 음성 부호화 방법 |
KR1020087019303A KR101029398B1 (ko) | 1997-10-22 | 1998-10-22 | 벡터 양자화 장치 및 방법 |
KR1020077016453A KR100938017B1 (ko) | 1997-10-22 | 1998-10-22 | 벡터 양자화 장치 및 방법 |
KR1020057016117A KR20050090026A (ko) | 1997-10-22 | 1998-10-22 | 확산 벡터 생성 방법 |
KR10-2003-7013816A KR100527217B1 (ko) | 1997-10-22 | 1998-10-22 | 확산 벡터 생성 방법, 확산 벡터 생성 장치, celp형 음성 복호화 방법 및 celp형 음성 복호화 장치 |
KR1020087018800A KR100872246B1 (ko) | 1997-10-22 | 1998-10-22 | 직교화 탐색 방법 및 음성 부호화기 |
KR1020087016338A KR100900113B1 (ko) | 1997-10-22 | 1998-10-22 | 확산 펄스 벡터 생성 장치 및 방법 |
KR1020077016452A KR100938018B1 (ko) | 1997-10-22 | 1998-10-22 | 확산 벡터 발생기 및 확산 벡터 발생 방법 |
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KR1020077016451A KR100886062B1 (ko) | 1997-10-22 | 1998-10-22 | 확산 펄스 벡터 생성 장치 및 방법 |
KR1019997005510A KR100651438B1 (ko) | 1997-10-22 | 1998-10-22 | 음성 부호화 장치, celp 음성 부호화 방법, 대수적 구조 음원의 직교화 탐색 방법 |
KR1020087018788A KR100925084B1 (ko) | 1997-10-22 | 1998-10-22 | 음성 부호화기 및 음성 부호화 방법 |
KR1020087019303A KR101029398B1 (ko) | 1997-10-22 | 1998-10-22 | 벡터 양자화 장치 및 방법 |
KR1020077016453A KR100938017B1 (ko) | 1997-10-22 | 1998-10-22 | 벡터 양자화 장치 및 방법 |
KR1020057016117A KR20050090026A (ko) | 1997-10-22 | 1998-10-22 | 확산 벡터 생성 방법 |
KR10-2003-7013816A KR100527217B1 (ko) | 1997-10-22 | 1998-10-22 | 확산 벡터 생성 방법, 확산 벡터 생성 장치, celp형 음성 복호화 방법 및 celp형 음성 복호화 장치 |
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KR1020087016338A KR100900113B1 (ko) | 1997-10-22 | 1998-10-22 | 확산 펄스 벡터 생성 장치 및 방법 |
KR1020077016452A KR100938018B1 (ko) | 1997-10-22 | 1998-10-22 | 확산 벡터 발생기 및 확산 벡터 발생 방법 |
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US (10) | US6415254B1 (ko) |
EP (12) | EP1760695B1 (ko) |
KR (10) | KR100886062B1 (ko) |
CN (1) | CN100349208C (ko) |
CA (3) | CA2275266C (ko) |
DE (8) | DE29825254U1 (ko) |
HK (10) | HK1025417A1 (ko) |
WO (1) | WO1999021174A1 (ko) |
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