KR100469224B1 - 음성부호화방법및장치 - Google Patents
음성부호화방법및장치 Download PDFInfo
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- KR100469224B1 KR100469224B1 KR1019960048088A KR19960048088A KR100469224B1 KR 100469224 B1 KR100469224 B1 KR 100469224B1 KR 1019960048088 A KR1019960048088 A KR 1019960048088A KR 19960048088 A KR19960048088 A KR 19960048088A KR 100469224 B1 KR100469224 B1 KR 100469224B1
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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
- G10L19/06—Determination or coding of the spectral characteristics, e.g. of the short-term prediction coefficients
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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
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
- H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
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- Acoustics & Sound (AREA)
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Abstract
Description
Claims (9)
- 시간축상의 입력음성신호를 단위로써 블록으로 분할하여 그 결과의 신호를 부호화하는 음성부호화방법에 있어서,적어도 입력음성신호의 유성음부에 대해서 단기간예측 오차(residual)를 구하는 단계와,그렇게 구해진 단기간예측 오차(residual)를 기초로 하여 정현분석 부호화파라미터를 구하는 단계와,정현분석 부호화파라미터상에 청각가중벡터양자화를 수행하는 단계와,파형부호화를 이용하여 입력음성신호의 무성음부를 부호화하는 단계를 포함하는 것을 특징으로 하는 음성부호화방법.
- 제 1항에 있어서,입력음성신호가 유성음인지 무성음인지를 판정하고, 그 판정결과를 기초로, 유성음으로 구해지는 입력음성신호부분은 상기 정현분석부호화로 처리하고 무성음으로 구해지는 입력음성신호부분은 분석/합성방법을 이용하는 폐루프 최적벡터탐색으로 벡터양자화하는 것을 특징으로 하는 음성부호화방법.
- 제 1항에 있어서,상기 청각가중벡터양자화가 수행된 정현분석파라미터로써 스펙트럼포락선을 나타내는 데이터를 사용하는 것을 특징으로 하는 음성부호화방법.
- 시간축상의 입력음성신호를 단위로써 블록으로 분할하여 그 결과의 신호를 부호화하는 음성부호화장치에 있어서,적어도 입력음성신호의 단기간예측 오차(residual)를 구하는 수단과,그렇게 구해진 단기간예측 오차(residual)를 기초로 하여 정현분석 부호화파라미터를 구하는 수단과,정현분석 부호화파라미터상에 청각가중벡터양자화를 수행하는 수단과,파형부호화를 이용하여 입력음성신호의 무성음부를 부호화하는 수단을 포함하여 구성된 것을 특징으로 하는 음성부호화장치.
- 시간축상의 입력음성신호를 단위로써 블록으로 분할하여 그 결과의 신호를 부호화하는 음성부호화방법에 있어서,적어도 입력음성신호의 유성음부에 대해서 단기간예측 오차(residual)를 구하는 단계와,그렇게 구해진 단기간예측 오차(residual)를 기초로 하여 정현분석 부호화파라미터를 구하는 단계와,정현분석 부호화파라미터상에 청각가중벡터양자화를 수행하는 단계를 포함하는 것을 특징으로 하는 음성부호화방법.
- 제 5항에 있어서,제 1벡터양자화단계와,상기 제 1벡터양자화시에 생성된 양자화에러벡터를 양자화하는 제 2벡터양자화단계를 적어도 포함하는 것을 특징으로 하는 음성부호화방법.
- 제 6항에 있어서,제 1벡터양자화단계의 출력을 저속의 비트속도로 도출하고, 상기 제 1벡터양자화단계의 출력과 상기 제 2벡터양자화단계의 출력들을 고속의 비트속도로 도출하는 것을 특징으로 하는 음성부호화방법.
- 시간축상의 입력음성신호를 단위로써 블록으로 분할하여 그 결과의 신호를 부호화하는 음성부호화장치에 있어서,입력음성신호의 단기간예측 오차(residual)를 구하는 수단과,그렇게 구해진 단기간예측 오차(residual)로부터 정현분석 부호화파라미터를 구하는 수단과,정현분석 부호화파라미터상에 청각가중된 다단의 벡터양자화를 수행하는 수단을 포함하여 구성된 것을 특징으로 하는 음성부호화장치.
- 입력음성신호를 증폭하기 위한 증폭수단과,상기 변조된 신호를 A/D변환하기 위한 A/D변환수단과,상기 A/D변환수단의 음성출력을 부호화하기 위한 음성부호화수단과,결과의 부호화신호를 채널부호화하기 위한 송신경로부호화수단과,상기 송신경로부호화수단의 출력을 변조하기 위한 변조수단과,결과의 변조신호를 D/A변환하기 위한 D/A변환수단과,상기 D/A변환수단으로부터의 신호를 증폭하여 결과의 증폭신호를 안테나로 인가하기 위한 증폭수단을 포함하는 것으로,상기 음성부호화수단은상기 입력음성신호의 단기간예측 오차(residual)를 구하는 수단과,그렇게 구해진 단기간예측 오차(residual)로부터 정현분석 부호화파라미터를 구하는 수단과,상기 정현분석 부호화파라미터상에 청각가중벡터양자화를 수행하는 수단과,파형부호화로 상기 입력음성신호를 부호화하는 수단을 더 포함하여 구성된 것을 특징으로 하는 휴대용 무선단말장치.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP27941295A JP4005154B2 (ja) | 1995-10-26 | 1995-10-26 | 音声復号化方法及び装置 |
JP95-279412 | 1995-10-26 |
Publications (2)
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KR970022701A KR970022701A (ko) | 1997-05-30 |
KR100469224B1 true KR100469224B1 (ko) | 2005-06-27 |
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KR1019960048088A KR100469224B1 (ko) | 1995-10-26 | 1996-10-24 | 음성부호화방법및장치 |
Country Status (6)
Country | Link |
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US (1) | US5848387A (ko) |
EP (1) | EP0772186B1 (ko) |
JP (1) | JP4005154B2 (ko) |
KR (1) | KR100469224B1 (ko) |
CN (1) | CN100414605C (ko) |
DE (1) | DE69625880T2 (ko) |
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WO1995013660A1 (fr) * | 1993-11-09 | 1995-05-18 | Sony Corporation | Appareil de quantification, procede de quantification, codeur a haute efficacite, procede de codage a haute efficacite, decodeur, supports d'enregistrement et de codage a haute efficacite |
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1995
- 1995-10-26 JP JP27941295A patent/JP4005154B2/ja not_active Expired - Lifetime
-
1996
- 1996-10-24 KR KR1019960048088A patent/KR100469224B1/ko not_active IP Right Cessation
- 1996-10-25 US US08/736,987 patent/US5848387A/en not_active Expired - Lifetime
- 1996-10-25 EP EP96307726A patent/EP0772186B1/en not_active Expired - Lifetime
- 1996-10-25 DE DE69625880T patent/DE69625880T2/de not_active Expired - Lifetime
- 1996-10-26 CN CNB961219920A patent/CN100414605C/zh not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
KR970022701A (ko) | 1997-05-30 |
JP4005154B2 (ja) | 2007-11-07 |
CN1155725A (zh) | 1997-07-30 |
JPH09127989A (ja) | 1997-05-16 |
CN100414605C (zh) | 2008-08-27 |
EP0772186A3 (en) | 1998-06-24 |
EP0772186B1 (en) | 2003-01-22 |
DE69625880D1 (de) | 2003-02-27 |
EP0772186A2 (en) | 1997-05-07 |
US5848387A (en) | 1998-12-08 |
DE69625880T2 (de) | 2003-10-30 |
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