DE602004007786T2 - Verfahren und vorrichtung zur quantisierung des verstärkungsfaktors in einem breitbandsprachkodierer mit variabler bitrate - Google Patents
Verfahren und vorrichtung zur quantisierung des verstärkungsfaktors in einem breitbandsprachkodierer mit variabler bitrate Download PDFInfo
- Publication number
- DE602004007786T2 DE602004007786T2 DE602004007786T DE602004007786T DE602004007786T2 DE 602004007786 T2 DE602004007786 T2 DE 602004007786T2 DE 602004007786 T DE602004007786 T DE 602004007786T DE 602004007786 T DE602004007786 T DE 602004007786T DE 602004007786 T2 DE602004007786 T2 DE 602004007786T2
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- gain
- codebook
- quantization
- subframes
- subframe
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- Expired - Lifetime
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Classifications
-
- 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
- G10L19/083—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters the excitation function being an excitation gain
-
- 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
-
- 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
- G10L19/16—Vocoder architecture
- G10L19/18—Vocoders using multiple modes
- G10L19/24—Variable rate codecs, e.g. for generating different qualities using a scalable representation such as hierarchical encoding or layered encoding
Landscapes
- Engineering & Computer Science (AREA)
- Computational Linguistics (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Quality & Reliability (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
- Image Processing (AREA)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US46678403P | 2003-05-01 | 2003-05-01 | |
| US466784P | 2003-05-01 | ||
| PCT/CA2004/000380 WO2004097797A1 (en) | 2003-05-01 | 2004-03-12 | Method and device for gain quantization in variable bit rate wideband speech coding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE602004007786D1 DE602004007786D1 (de) | 2007-09-06 |
| DE602004007786T2 true DE602004007786T2 (de) | 2008-04-30 |
Family
ID=33418422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE602004007786T Expired - Lifetime DE602004007786T2 (de) | 2003-05-01 | 2004-03-12 | Verfahren und vorrichtung zur quantisierung des verstärkungsfaktors in einem breitbandsprachkodierer mit variabler bitrate |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US7778827B2 (enExample) |
| EP (1) | EP1618557B1 (enExample) |
| JP (1) | JP4390803B2 (enExample) |
| KR (1) | KR100732659B1 (enExample) |
| CN (1) | CN1820306B (enExample) |
| AT (1) | ATE368279T1 (enExample) |
| BR (1) | BRPI0409970B1 (enExample) |
| DE (1) | DE602004007786T2 (enExample) |
| MY (1) | MY143176A (enExample) |
| RU (1) | RU2316059C2 (enExample) |
| WO (1) | WO2004097797A1 (enExample) |
Families Citing this family (44)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100668300B1 (ko) * | 2003-07-09 | 2007-01-12 | 삼성전자주식회사 | 비트율 확장 음성 부호화 및 복호화 장치와 그 방법 |
| EP1496500B1 (en) * | 2003-07-09 | 2007-02-28 | Samsung Electronics Co., Ltd. | Bitrate scalable speech coding and decoding apparatus and method |
| US7353436B2 (en) * | 2004-07-21 | 2008-04-01 | Pulse-Link, Inc. | Synchronization code methods |
| US7630886B2 (en) * | 2005-01-14 | 2009-12-08 | Nokia Corporation | Hochwald construction of unitary matrix codebooks via eigen coordinate transformations |
| US8031583B2 (en) | 2005-03-30 | 2011-10-04 | Motorola Mobility, Inc. | Method and apparatus for reducing round trip latency and overhead within a communication system |
| SG163556A1 (en) * | 2005-04-01 | 2010-08-30 | Qualcomm Inc | Systems, methods, and apparatus for wideband speech coding |
| US9043214B2 (en) * | 2005-04-22 | 2015-05-26 | Qualcomm Incorporated | Systems, methods, and apparatus for gain factor attenuation |
| US20070005347A1 (en) * | 2005-06-30 | 2007-01-04 | Kotzin Michael D | Method and apparatus for data frame construction |
| US7587314B2 (en) * | 2005-08-29 | 2009-09-08 | Nokia Corporation | Single-codebook vector quantization for multiple-rate applications |
| US9454974B2 (en) * | 2006-07-31 | 2016-09-27 | Qualcomm Incorporated | Systems, methods, and apparatus for gain factor limiting |
| US8400998B2 (en) | 2006-08-23 | 2013-03-19 | Motorola Mobility Llc | Downlink control channel signaling in wireless communication systems |
| US7788827B2 (en) * | 2007-03-06 | 2010-09-07 | Nike, Inc. | Article of footwear with mesh on outsole and insert |
| US9466307B1 (en) * | 2007-05-22 | 2016-10-11 | Digimarc Corporation | Robust spectral encoding and decoding methods |
| KR101449431B1 (ko) * | 2007-10-09 | 2014-10-14 | 삼성전자주식회사 | 계층형 광대역 오디오 신호의 부호화 방법 및 장치 |
| CN101868821B (zh) * | 2007-11-21 | 2015-09-23 | Lg电子株式会社 | 用于处理信号的方法和装置 |
| CN101499281B (zh) * | 2008-01-31 | 2011-04-27 | 华为技术有限公司 | 一种语音编码中的增益量化方法及装置 |
| EP2107556A1 (en) * | 2008-04-04 | 2009-10-07 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Audio transform coding using pitch correction |
| US8473288B2 (en) * | 2008-06-19 | 2013-06-25 | Panasonic Corporation | Quantizer, encoder, and the methods thereof |
| DK2313887T3 (da) * | 2008-07-10 | 2017-11-13 | Voiceage Corp | Variabel bitrate lpc filterkvantisering og invers kvantiseringsindretning og -fremgangsmåde |
| MY154452A (en) | 2008-07-11 | 2015-06-15 | Fraunhofer Ges Forschung | An apparatus and a method for decoding an encoded audio signal |
| RU2536679C2 (ru) | 2008-07-11 | 2014-12-27 | Фраунхофер-Гезелльшафт цур Фёрдерунг дер ангевандтен | Передатчик сигнала активации с деформацией по времени, кодер звукового сигнала, способ преобразования сигнала активации с деформацией по времени, способ кодирования звукового сигнала и компьютерные программы |
| CN102144256B (zh) * | 2008-07-17 | 2013-08-28 | 诺基亚公司 | 用于针对矢量量化器的快速最近邻搜索的方法和设备 |
| CN101604525B (zh) * | 2008-12-31 | 2011-04-06 | 华为技术有限公司 | 基音增益获取方法、装置及编码器、解码器 |
| CN101615395B (zh) | 2008-12-31 | 2011-01-12 | 华为技术有限公司 | 信号编码、解码方法及装置、系统 |
| US8855062B2 (en) | 2009-05-28 | 2014-10-07 | Qualcomm Incorporated | Dynamic selection of subframe formats in a wireless network |
| KR20110001130A (ko) * | 2009-06-29 | 2011-01-06 | 삼성전자주식회사 | 가중 선형 예측 변환을 이용한 오디오 신호 부호화 및 복호화 장치 및 그 방법 |
| EP2491555B1 (en) * | 2009-10-20 | 2014-03-05 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Multi-mode audio codec |
| EP4651130A1 (en) * | 2009-10-20 | 2025-11-19 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Audio signal encoder, audio signal decoder, method for encoding or decoding an audio signal using an aliasing-cancellation |
| RU2435214C2 (ru) * | 2010-02-01 | 2011-11-27 | Государственное образовательное учреждение высшего профессионального образования Академия Федеральной службы охраны Российской Федерации (Академия ФСО России) | Способ быстрого поиска в кодовой книге при векторном квантовании |
| US8868432B2 (en) * | 2010-10-15 | 2014-10-21 | Motorola Mobility Llc | Audio signal bandwidth extension in CELP-based speech coder |
| US8924200B2 (en) * | 2010-10-15 | 2014-12-30 | Motorola Mobility Llc | Audio signal bandwidth extension in CELP-based speech coder |
| CN101986629B (zh) * | 2010-10-25 | 2013-06-05 | 华为技术有限公司 | 估计窄带干扰的方法、装置及接收设备 |
| KR20120046627A (ko) * | 2010-11-02 | 2012-05-10 | 삼성전자주식회사 | 화자 적응 방법 및 장치 |
| US9626982B2 (en) | 2011-02-15 | 2017-04-18 | Voiceage Corporation | Device and method for quantizing the gains of the adaptive and fixed contributions of the excitation in a CELP codec |
| HUE071693T2 (hu) * | 2011-02-15 | 2025-09-28 | Voiceage Evs Llc | Eszköz és eljárás gerjesztés adaptív és rögzített hozzájárulásai erõsítésének kvantálására egy CELP kodekben |
| GB2490879B (en) | 2011-05-12 | 2018-12-26 | Qualcomm Technologies Int Ltd | Hybrid coded audio data streaming apparatus and method |
| CN103915097B (zh) * | 2013-01-04 | 2017-03-22 | 中国移动通信集团公司 | 一种语音信号处理方法、装置和系统 |
| US9607624B2 (en) * | 2013-03-29 | 2017-03-28 | Apple Inc. | Metadata driven dynamic range control |
| TWI557726B (zh) * | 2013-08-29 | 2016-11-11 | 杜比國際公司 | 用於決定音頻信號的高頻帶信號的主比例因子頻帶表之系統和方法 |
| BR112016008544B1 (pt) | 2013-10-18 | 2021-12-21 | Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Forschung E.V. | Codificador para codificar e decodificador para decodificar um sinal de áudio, método para codificar e método para decodificar um sinal de áudio. |
| JP6366706B2 (ja) | 2013-10-18 | 2018-08-01 | フラウンホーファー−ゲゼルシャフト・ツール・フェルデルング・デル・アンゲヴァンテン・フォルシュング・アインゲトラーゲネル・フェライン | スピーチ関連のスペクトル整形情報を使用したオーディオ信号符号化と復号化の概念 |
| CN106033672B (zh) | 2015-03-09 | 2021-04-09 | 华为技术有限公司 | 确定声道间时间差参数的方法和装置 |
| US10944418B2 (en) | 2018-01-26 | 2021-03-09 | Mediatek Inc. | Analog-to-digital converter capable of generate digital output signal having different bits |
| CN113823298B (zh) * | 2021-06-15 | 2024-04-16 | 腾讯科技（深圳）有限公司 | 语音数据处理方法、装置、计算机设备及存储介质 |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5701392A (en) * | 1990-02-23 | 1997-12-23 | Universite De Sherbrooke | Depth-first algebraic-codebook search for fast coding of speech |
| CA2010830C (en) * | 1990-02-23 | 1996-06-25 | Jean-Pierre Adoul | Dynamic codebook for efficient speech coding based on algebraic codes |
| US5195168A (en) * | 1991-03-15 | 1993-03-16 | Codex Corporation | Speech coder and method having spectral interpolation and fast codebook search |
| SE504397C2 (sv) * | 1995-05-03 | 1997-01-27 | Ericsson Telefon Ab L M | Metod för förstärkningskvantisering vid linjärprediktiv talkodning med kodboksexcitering |
| 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 |
| TW326070B (en) * | 1996-12-19 | 1998-02-01 | Holtek Microelectronics Inc | The estimation method of the impulse gain for coding vocoder |
| US6260010B1 (en) * | 1998-08-24 | 2001-07-10 | Conexant Systems, Inc. | Speech encoder using gain normalization that combines open and closed loop gains |
| US6397178B1 (en) * | 1998-09-18 | 2002-05-28 | Conexant Systems, Inc. | Data organizational scheme for enhanced selection of gain parameters for speech coding |
| US7315815B1 (en) * | 1999-09-22 | 2008-01-01 | Microsoft Corporation | LPC-harmonic vocoder with superframe structure |
| CA2290037A1 (en) * | 1999-11-18 | 2001-05-18 | Voiceage Corporation | Gain-smoothing amplifier device and method in codecs for wideband speech and audio signals |
| DE60233283D1 (de) | 2001-02-27 | 2009-09-24 | Texas Instruments Inc | Verschleierungsverfahren bei Verlust von Sprachrahmen und Dekoder dafer |
| CN100527225C (zh) | 2002-01-08 | 2009-08-12 | 迪里辛姆网络控股有限公司 | 基于celp的语音代码之间的代码转换方案 |
| JP4330346B2 (ja) | 2002-02-04 | 2009-09-16 | 富士通株式会社 | 音声符号に対するデータ埋め込み／抽出方法および装置並びにシステム |
-
2004
- 2004-03-12 KR KR1020057020667A patent/KR100732659B1/ko not_active Expired - Lifetime
- 2004-03-12 CN CN2004800183844A patent/CN1820306B/zh not_active Expired - Lifetime
- 2004-03-12 WO PCT/CA2004/000380 patent/WO2004097797A1/en not_active Ceased
- 2004-03-12 AT AT04719892T patent/ATE368279T1/de active
- 2004-03-12 DE DE602004007786T patent/DE602004007786T2/de not_active Expired - Lifetime
- 2004-03-12 RU RU2005137320/09A patent/RU2316059C2/ru active
- 2004-03-12 BR BRPI0409970-2A patent/BRPI0409970B1/pt not_active IP Right Cessation
- 2004-03-12 EP EP04719892A patent/EP1618557B1/en not_active Expired - Lifetime
- 2004-03-12 JP JP2006504076A patent/JP4390803B2/ja not_active Expired - Lifetime
- 2004-03-18 MY MYPI20040966A patent/MY143176A/en unknown
-
2005
- 2005-01-19 US US11/039,538 patent/US7778827B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| US7778827B2 (en) | 2010-08-17 |
| RU2005137320A (ru) | 2006-06-10 |
| CN1820306A (zh) | 2006-08-16 |
| EP1618557B1 (en) | 2007-07-25 |
| US20050251387A1 (en) | 2005-11-10 |
| DE602004007786D1 (de) | 2007-09-06 |
| KR20060007412A (ko) | 2006-01-24 |
| WO2004097797A1 (en) | 2004-11-11 |
| JP4390803B2 (ja) | 2009-12-24 |
| HK1082315A1 (en) | 2006-06-02 |
| ATE368279T1 (de) | 2007-08-15 |
| RU2316059C2 (ru) | 2008-01-27 |
| JP2006525533A (ja) | 2006-11-09 |
| EP1618557A1 (en) | 2006-01-25 |
| KR100732659B1 (ko) | 2007-06-27 |
| BRPI0409970A (pt) | 2006-04-25 |
| CN1820306B (zh) | 2010-05-05 |
| BRPI0409970B1 (pt) | 2018-07-24 |
| MY143176A (en) | 2011-03-31 |
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