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1. WO2010092827 - VECTOR QUANTIZATION DEVICE, VECTOR INVERSE-QUANTIZATION DEVICE, AND METHODS OF SAME

Publication Number WO/2010/092827
Publication Date 19.08.2010
International Application No. PCT/JP2010/000881
International Filing Date 12.02.2010
IPC
H03M 7/30 2006.01
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
MCODING, DECODING OR CODE CONVERSION, IN GENERAL
7Conversion of a code where information is represented by a given sequence or number of digits to a code where the same information is represented by a different sequence or number of digits
30Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
G10L 19/06 2006.01
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
19Speech or audio signal 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
04using predictive techniques
06Determination or coding of the spectral characteristics, e.g. of the short-term prediction coefficients
G10L 19/14 2006.01
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
19Speech or audio signal 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
04using predictive techniques
14Details not provided for in groups G10L19/06-G10L19/1287
CPC
G10L 19/038
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
19Speech 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
02using spectral analysis, e.g. transform vocoders or subband vocoders
032Quantisation or dequantisation of spectral components
038Vector quantisation, e.g. TwinVQ audio
G10L 19/07
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
19Speech 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
04using predictive techniques
06Determination or coding of the spectral characteristics, e.g. of the short-term prediction coefficients
07Line spectrum pair [LSP] vocoders
G10L 19/12
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
19Speech 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
04using predictive techniques
08Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters
12the excitation function being a code excitation, e.g. in code excited linear prediction [CELP] vocoders
G10L 19/18
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
19Speech 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
04using predictive techniques
16Vocoder architecture
18Vocoders using multiple modes
G10L 2019/0005
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
19Speech 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
0001Codebooks
0004Design or structure of the codebook
0005Multi-stage vector quantisation
H03M 7/3082
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
MCODING; DECODING; CODE CONVERSION IN GENERAL
7Conversion 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
30Compression
3082Vector coding
Applicants
  • パナソニック株式会社 PANASONIC CORPORATION [JP]/[JP] (AllExceptUS)
  • 佐藤薫 SATOH, Kaoru (UsOnly)
  • 森井利幸 MORII, Toshiyuki (UsOnly)
Inventors
  • 佐藤薫 SATOH, Kaoru
  • 森井利幸 MORII, Toshiyuki
Agents
  • 鷲田 公一 WASHIDA, Kimihito
Priority Data
2009-03165113.02.2009JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) VECTOR QUANTIZATION DEVICE, VECTOR INVERSE-QUANTIZATION DEVICE, AND METHODS OF SAME
(FR) DISPOSITIF DE QUANTIFICATION VECTORIELLE, DISPOSITIF DE QUANTIFICATION VECTORIELLE INVERSE ET PROCÉDÉS ASSOCIÉS
(JA) ベクトル量子化装置、ベクトル逆量子化装置、およびこれらの方法
Abstract
(EN)
An LSP vector quantization device able to improve the precision of quantization in vector quantization where a codebook for first stage vector quantization is switched according to the type of a feature that has a correlation with the quantization target vector. In this device, a classifier (101) selects, from a plurality of code vectors for classifying, the code vector for classifying that indicates the type of the feature that has a correlation with the quantization target vector; a switch (102) selects, from among a plurality of first codebooks, the first codebook corresponding to the abovementioned type; an error minimizing unit (105) selects, from the plurality of first code vectors constituting the selected first codebook, the first code vector closest to the quantization target vector; a matrix determining unit (106) selects, from a plurality of matrices, the matrix corresponding to the abovementioned type; and the error minimizing unit (105) uses the selected matrix to select, from a plurality of second code vectors, the one that is closest to the residual vector between the selected first code vector and the quantization target vector.
(FR)
L'invention concerne un dispositif de quantification vectorielle LSP permettant d'améliorer la précision de quantification dans la quantification vectorielle lors de laquelle un livre de codes pour une quantification vectorielle de premier étage est commuté selon le type d'un élément qui a une corrélation avec le vecteur cible de quantification. Dans ce dispositif, un classificateur (101) sélectionne, parmi une pluralité de vecteurs de code pour classification, le vecteur de code pour classification qui indique le type de l'élément qui a une corrélation avec le vecteur cible de quantification; un commutateur (102) sélectionne, parmi une pluralité de premiers livres de codes, le premier livre de codes correspondant au type susmentionné; une unité de minimisation d'erreur (105) sélectionne, parmi la pluralité de premiers vecteurs de code constituant le premier livre de codes sélectionné, le premier vecteur de code le plus proche du vecteur cible de quantification; une unité de détermination de matrice (106) sélectionne, parmi une pluralité de matrices, la matrice correspondant au type susmentionné; et l'unité de minimisation d'erreurs (105) utilise la matrice sélectionnée pour sélectionner, parmi une pluralité de seconds vecteurs de code, celui qui est le plus proche du vecteur résiduel entre le premier vecteur de code sélectionné et le vecteur cible de quantification.
(JA)
 量子化対象ベクトルとの相関を有する特徴の種類によって1段目のベクトル量子化のコードブックを切り替えるベクトル量子化の量子化精度を向上することができるLSPベクトル量子化装置。この装置において、分類器(101)は、複数の分類用コードベクトルの中から、量子化対象ベクトルとの相関を有する特徴の種類を示す分類用コードベクトルを選択し、スイッチ(102)は、複数の第1コードブックの中から上記種類に対応する第1コードブックを選択し、誤差最小化部(105)は、選択された第1コードブックを構成する複数の第1コードベクトルの中から、量子化対象ベクトルに最も近い第1コードベクトルを選択し、行列決定部(106)は、複数の行列の中から上記種類に対応する行列を選択し、誤差最小化部(105)は、選択された行列を用いて複数の第2コードベクトルの中から、選択された第1コードベクトルと量子化対象ベクトルとの残差ベクトルに最も近いものを選択する。
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