JP3981399B1 - 固定符号帳探索装置および固定符号帳探索方法 - Google Patents
固定符号帳探索装置および固定符号帳探索方法 Download PDFInfo
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- JP3981399B1 JP3981399B1 JP2007027408A JP2007027408A JP3981399B1 JP 3981399 B1 JP3981399 B1 JP 3981399B1 JP 2007027408 A JP2007027408 A JP 2007027408A JP 2007027408 A JP2007027408 A JP 2007027408A JP 3981399 B1 JP3981399 B1 JP 3981399B1
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- 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
- G10L19/10—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
-
- 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
Abstract
【解決手段】パルス音源ベクトルを生成する代数符号帳101と、負の時間に値を有するインパルス応答ベクトルに聴覚重み付け合成フィルタのインパルス応答を畳み込んで負の時間に値を有する第2のインパルス応答ベクトルを生成する畳み込み演算部151と、第2のインパルス応答ベクトルを用いてテプリッツ型の畳み込み行列を生成する行列生成部152と、代数符号帳101によって生成されたパルス音源ベクトルに行列生成部152によって生成された行列を畳み込む畳み込み演算部153と、を備える。
【選択図】図2
Description
ITU−T Recommendation G.729、"Coding of Speech at 8 kbit/s using Conjugate−structure Algebraic−Code−Excited Lineare−Prediction (CS−ACELP)"、1996年3月 ITU−T Recommendation G.723.1、"Dual Rate Speech Coder for Multimedia Communications Transmitting at 5.3 and 6.3 kbit/s"、1996年3月 3GPP TS 26.090、"AMR speech codec;Transcoding functions"V4.0.0、2001年3月 R.Hagen他、"Removal of sparse−excitation artifacts in CELP"、IEEE ICASSP‘98、pp.145〜148、1998
図1は、本発明の一実施の形態に係る音声符号化装置における固定符号帳ベクトル生成装置100の構成を示すブロック図である。なお、本実施の形態では、固定符号帳ベクトル生成装置100は、携帯電話等の通信端末装置に搭載されて使用されるCELP型音声符号化装置の固定符号帳として使用されるものとする。
101 代数符号帳
102 畳み込み演算部
150 固定符号帳探索装置
151 畳み込み演算部
152 行列生成部
153 畳み込み演算部
154 加算器
155 誤差最小化部
200 CELP型音声符号化装置
201 前処理部
202 線形予測分析部
203 加算器
204 LPC量子化部
205 聴覚重み付けフィルタ
206 合成フィルタ
207 誤差最小化部
208 適応符号帳ベクトル生成部
209 増幅器
210 増幅器
211 加算器
212 ビットストリーム生成部
Claims (7)
- パルス音源ベクトルを生成するパルス音源ベクトル生成部と、
負の時間に値を有するインパルス応答ベクトルに聴覚重み付け合成フィルタのインパルス応答を畳み込んで、負の時間に値を有する第2のインパルス応答ベクトルを生成する第1の畳み込み演算部と、
前記第1の畳み込み演算部によって生成された第2のインパルス応答ベクトルを用いてテプリッツ型の畳み込み行列を生成する行列生成部と、
前記パルス音源ベクトル生成部によって生成されたパルス音源ベクトルに前記行列生成部によって生成された行列を用いて畳み込み処理を行う第2の畳み込み演算部と、を具備する、固定符号帳探索装置。 - 前記第2のインパルス応答ベクトルの負の時間成分のエネルギが非負の時間成分のエネルギに比べて小さい、請求項1記載の固定符号帳探索装置。
- 前記第2のインパルス応答ベクトルの負の時間成分の時間長が非負の時間成分の時間長に比べて短い、請求項1記載の固定符号帳探索装置。
- 前記第2の負の時間に値を有するインパルス応答ベクトルの負の時間成分が1つである、請求項1記載の固定符号帳探索装置。
- パルス音源ベクトルを生成するパルス音源ベクトル生成ステップと、
負の時間に値を有するインパルス応答ベクトルに聴覚重み付け合成フィルタのインパルス応答を畳み込んで、負の時間に値を有する第2のインパルス応答ベクトルを生成する第1の畳み込み演算ステップと、
前記第1の畳み込み演算ステップで生成された第2のインパルス応答ベクトルを用いてテプリッツ型の畳み込み行列を生成する行列生成ステップと、
前記パルス音源ベクトルに前記テプリッツ型の畳み込み行列を用いて畳み込み処理を行う第2の畳み込み演算ステップと、を有する、固定符号帳探索方法。
Priority Applications (32)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007027408A JP3981399B1 (ja) | 2006-03-10 | 2007-02-06 | 固定符号帳探索装置および固定符号帳探索方法 |
KR1020087017192A KR101359203B1 (ko) | 2006-03-10 | 2007-03-08 | 고정 코드북 탐색 장치 |
RU2008136401/09A RU2425428C2 (ru) | 2006-03-10 | 2007-03-08 | Устройство поиска в фиксированных таблицах кодирования и способ поиска в фиксированных таблицах кодирования |
CA2642804A CA2642804C (en) | 2006-03-10 | 2007-03-08 | Fixed codebook searching device and fixed codebook searching method |
CN2011101877341A CN102194462B (zh) | 2006-03-10 | 2007-03-08 | 固定码本搜索装置 |
CN2011101875793A CN102194461B (zh) | 2006-03-10 | 2007-03-08 | 固定码本搜索装置 |
CN201110188743.2A CN102201239B (zh) | 2006-03-10 | 2007-03-08 | 固定码本搜索装置以及固定码本搜索方法 |
KR1020127004264A KR101359147B1 (ko) | 2006-03-10 | 2007-03-08 | 고정 코드북 탐색 장치 및 고정 코드북 탐색 방법 |
US11/683,830 US7519533B2 (en) | 2006-03-10 | 2007-03-08 | Fixed codebook searching apparatus and fixed codebook searching method |
MX2008011338A MX2008011338A (es) | 2006-03-10 | 2007-03-08 | Aparato de busqueda de libro de codigos fijo y metodo de busqueda de libro de codigos fijo. |
CN2007800028772A CN101371299B (zh) | 2006-03-10 | 2007-03-08 | 固定码本搜索装置以及固定码本搜索方法 |
PCT/JP2007/054529 WO2007105587A1 (ja) | 2006-03-10 | 2007-03-08 | 固定符号帳探索装置および固定符号帳探索方法 |
BRPI0708742-0A BRPI0708742A2 (pt) | 2006-02-10 | 2007-03-08 | aparelho de pesquisa de tabela de consulta fixa e método de pesquisa de tabela de consulta fixa |
AU2007225879A AU2007225879B2 (en) | 2006-03-10 | 2007-03-08 | Fixed codebook searching device and fixed codebook searching method |
KR1020127004260A KR101359167B1 (ko) | 2006-03-10 | 2007-03-08 | 고정 코드북 탐색 장치 |
KR1020070023587A KR100806470B1 (ko) | 2006-03-10 | 2007-03-09 | 고정 코드북 탐색 장치 및 고정 코드북 탐색 방법 |
EP09007849.4A EP2113912B1 (en) | 2006-03-10 | 2007-03-12 | Fixed codebook searching apparatus and method |
ES08005995T ES2329198T3 (es) | 2006-03-10 | 2007-03-12 | Aparato para busqueda en el libro de codificacion fijo. |
DE602007001861T DE602007001861D1 (de) | 2006-03-10 | 2007-03-12 | Vorrichtung zur Suche in einem festen Codebuch |
ES07103936T ES2308765T3 (es) | 2006-03-10 | 2007-03-12 | Aparato y metodo para busqueda en un libro de codificacion fijo. |
EP08005995A EP1942488B1 (en) | 2006-03-10 | 2007-03-12 | Fixed codebook searching apparatus |
EP08005996A EP1942489B1 (en) | 2006-03-10 | 2007-03-12 | Fixed codebook searching apparatus |
EP07103936A EP1833047B1 (en) | 2006-03-10 | 2007-03-12 | Fixed codebook searching apparatus and fixed codebook searching method |
ES08005996T ES2329199T3 (es) | 2006-03-10 | 2007-03-12 | Aparato para busqueda en el libro de codificacion fijo. |
DE602007001862T DE602007001862D1 (de) | 2006-03-10 | 2007-03-12 | Vorrichtung zur Suche in einem festen Codebuch |
AT07103936T ATE400048T1 (de) | 2006-03-10 | 2007-03-12 | Vorrichtung und verfahren zur suche in einem festen codebuch |
DE602007000030T DE602007000030D1 (de) | 2006-03-10 | 2007-03-12 | Vorrichtung und Verfahren zur Suche in einem festen Codebuch |
ZA200807703A ZA200807703B (en) | 2006-03-10 | 2008-09-08 | Fixed codebook searching device and fixed codebook searching method |
US12/392,880 US7957962B2 (en) | 2006-03-10 | 2009-02-25 | Fixed codebook searching apparatus and fixed codebook searching method |
US12/392,858 US7949521B2 (en) | 2006-03-10 | 2009-02-25 | Fixed codebook searching apparatus and fixed codebook searching method |
RU2011111943/08A RU2458412C1 (ru) | 2006-03-10 | 2011-03-29 | Устройство поиска фиксированных таблиц кодирования и способ поиска фиксированных таблиц кодирования |
US13/093,294 US8452590B2 (en) | 2006-03-10 | 2011-04-25 | Fixed codebook searching apparatus and fixed codebook searching method |
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JP2007027408A JP3981399B1 (ja) | 2006-03-10 | 2007-02-06 | 固定符号帳探索装置および固定符号帳探索方法 |
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US (4) | US7519533B2 (ja) |
EP (4) | EP1942488B1 (ja) |
JP (1) | JP3981399B1 (ja) |
KR (4) | KR101359147B1 (ja) |
CN (4) | CN102194462B (ja) |
AT (1) | ATE400048T1 (ja) |
AU (1) | AU2007225879B2 (ja) |
BR (1) | BRPI0708742A2 (ja) |
CA (1) | CA2642804C (ja) |
DE (3) | DE602007001862D1 (ja) |
ES (3) | ES2308765T3 (ja) |
MX (1) | MX2008011338A (ja) |
RU (2) | RU2425428C2 (ja) |
WO (1) | WO2007105587A1 (ja) |
ZA (1) | ZA200807703B (ja) |
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