WO2002049218A1 - Encoder and decoder - Google Patents
Encoder and decoder Download PDFInfo
- Publication number
- WO2002049218A1 WO2002049218A1 PCT/JP2001/010974 JP0110974W WO0249218A1 WO 2002049218 A1 WO2002049218 A1 WO 2002049218A1 JP 0110974 W JP0110974 W JP 0110974W WO 0249218 A1 WO0249218 A1 WO 0249218A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- series signal
- time
- frequency component
- generated
- low
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B14/00—Transmission systems not characterised by the medium used for transmission
- H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
- H04B14/04—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using pulse code modulation
- H04B14/046—Systems or methods for reducing noise or bandwidth
-
- 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
- G10L19/02—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 spectral analysis, e.g. transform vocoders or subband vocoders
-
- 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
- G10L19/02—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 spectral analysis, e.g. transform vocoders or subband vocoders
- G10L19/022—Blocking, i.e. grouping of samples in time; Choice of analysis windows; Overlap factoring
- G10L19/025—Detection of transients or attacks for time/frequency resolution switching
-
- 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
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/66—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for reducing bandwidth of signals; for improving efficiency of transmission
- H04B1/667—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for reducing bandwidth of signals; for improving efficiency of transmission using a division in frequency subbands
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/06—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection
- H04L25/061—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection providing hard decisions only; arrangements for tracking or suppressing unwanted low frequency components, e.g. removal of dc offset
- H04L25/062—Setting decision thresholds using feedforward techniques only
-
- 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
- G10L19/02—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 spectral analysis, e.g. transform vocoders or subband vocoders
- G10L19/0204—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 spectral analysis, e.g. transform vocoders or subband vocoders using subband decomposition
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Human Computer Interaction (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Health & Medical Sciences (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Computational Linguistics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Power Engineering (AREA)
- Theoretical Computer Science (AREA)
- Quality & Reliability (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020027010601A KR100817424B1 (ko) | 2000-12-14 | 2001-12-14 | 부호화 장치 및 복호 장치 |
DE60138960T DE60138960D1 (de) | 2000-12-14 | 2001-12-14 | Codierung und decodierung |
US10/203,775 US7124076B2 (en) | 2000-12-14 | 2001-12-14 | Encoding apparatus and decoding apparatus |
EP01270958A EP1335496B1 (en) | 2000-12-14 | 2001-12-14 | Coding and decoding |
JP2002550407A JP3997522B2 (ja) | 2000-12-14 | 2001-12-14 | 符号化装置および方法、復号装置および方法、並びに記録媒体 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000-380639 | 2000-12-14 | ||
JP2000380639 | 2000-12-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002049218A1 true WO2002049218A1 (en) | 2002-06-20 |
Family
ID=18848780
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2001/010974 WO2002049218A1 (en) | 2000-12-14 | 2001-12-14 | Encoder and decoder |
Country Status (6)
Country | Link |
---|---|
US (1) | US7124076B2 (ja) |
EP (1) | EP1335496B1 (ja) |
JP (1) | JP3997522B2 (ja) |
KR (1) | KR100817424B1 (ja) |
DE (1) | DE60138960D1 (ja) |
WO (1) | WO2002049218A1 (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2720222A1 (en) * | 2012-10-10 | 2014-04-16 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Apparatus and method for efficient synthesis of sinusoids and sweeps by employing spectral patterns |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03132228A (ja) * | 1989-10-18 | 1991-06-05 | Victor Co Of Japan Ltd | 直交変換信号符号化復号化方式 |
JPH03263925A (ja) * | 1990-03-14 | 1991-11-25 | Sony Corp | デイジタルデータの高能率符号化方法 |
JPH05304479A (ja) * | 1992-04-27 | 1993-11-16 | Sony Corp | オーディオ信号の高能率符号化装置 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4441200A (en) * | 1981-10-08 | 1984-04-03 | Motorola Inc. | Digital voice processing system |
US4736455A (en) * | 1985-12-23 | 1988-04-05 | Nippon Telegraph And Telephone Corporation | Interference cancellation system |
WO1987004293A1 (en) * | 1986-01-03 | 1987-07-16 | Motorola, Inc. | Method and apparatus for synthesizing speech without voicing or pitch information |
KR100352351B1 (ko) * | 1994-02-05 | 2003-01-06 | 소니 가부시끼 가이샤 | 정보부호화방법및장치와정보복호화방법및장치 |
EP0713295B1 (en) * | 1994-04-01 | 2004-09-15 | Sony Corporation | Method and device for encoding information, method and device for decoding information |
US5664055A (en) * | 1995-06-07 | 1997-09-02 | Lucent Technologies Inc. | CS-ACELP speech compression system with adaptive pitch prediction filter gain based on a measure of periodicity |
JP4005154B2 (ja) * | 1995-10-26 | 2007-11-07 | ソニー株式会社 | 音声復号化方法及び装置 |
JP4121578B2 (ja) * | 1996-10-18 | 2008-07-23 | ソニー株式会社 | 音声分析方法、音声符号化方法および装置 |
US6160886A (en) * | 1996-12-31 | 2000-12-12 | Ericsson Inc. | Methods and apparatus for improved echo suppression in communications systems |
US6173257B1 (en) * | 1998-08-24 | 2001-01-09 | Conexant Systems, Inc | Completed fixed codebook for speech encoder |
JP2007090001A (ja) * | 2005-09-30 | 2007-04-12 | Ge Medical Systems Global Technology Co Llc | Mrスキャン方法およびmri装置 |
-
2001
- 2001-12-14 US US10/203,775 patent/US7124076B2/en not_active Expired - Lifetime
- 2001-12-14 JP JP2002550407A patent/JP3997522B2/ja not_active Expired - Fee Related
- 2001-12-14 EP EP01270958A patent/EP1335496B1/en not_active Expired - Lifetime
- 2001-12-14 DE DE60138960T patent/DE60138960D1/de not_active Expired - Lifetime
- 2001-12-14 WO PCT/JP2001/010974 patent/WO2002049218A1/ja active Application Filing
- 2001-12-14 KR KR1020027010601A patent/KR100817424B1/ko active IP Right Grant
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03132228A (ja) * | 1989-10-18 | 1991-06-05 | Victor Co Of Japan Ltd | 直交変換信号符号化復号化方式 |
JPH03263925A (ja) * | 1990-03-14 | 1991-11-25 | Sony Corp | デイジタルデータの高能率符号化方法 |
JPH05304479A (ja) * | 1992-04-27 | 1993-11-16 | Sony Corp | オーディオ信号の高能率符号化装置 |
Non-Patent Citations (1)
Title |
---|
See also references of EP1335496A4 * |
Also Published As
Publication number | Publication date |
---|---|
KR100817424B1 (ko) | 2008-03-27 |
EP1335496A1 (en) | 2003-08-13 |
JP3997522B2 (ja) | 2007-10-24 |
DE60138960D1 (de) | 2009-07-23 |
JPWO2002049218A1 (ja) | 2004-04-15 |
KR20030009360A (ko) | 2003-01-29 |
EP1335496A4 (en) | 2008-02-27 |
US20030138057A1 (en) | 2003-07-24 |
US7124076B2 (en) | 2006-10-17 |
EP1335496B1 (en) | 2009-06-10 |
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