Vector quantizer

H - Electricity – 03 – M

Patent

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Details

H03M 7/00 (2006.01) G06T 9/00 (2006.01) G10L 19/00 (2006.01)

Patent

CA 2131880

A vector quantizer is disclosed which performs low bit rate coding of time sequential signals such as speech signals and image signals. Means are provided for providing a basis vector set consisting of basis vectors greater in number than a predetermined number of bits and correspondingly forming, from the basis vector set, subsets corresponding in number to at most a predetermined number of bits. The subsets thus formed include those consisting of at most a single basis vector and coefficient vector subsets formed from the coefficient vector set and determined according to the formed basis vector subsets.

Quantificateur vectoriel exécutant du codage à faible débit binaire de signaux de séquences temporelles, par exemple des signaux vocaux et des signaux images. Des éléments fournissent un ensemble de vecteurs de base consistant en des vecteurs de base dont le nombre est supérieur à un nombre prédéterminé de bits et formant, à partir de l'ensemble de vecteurs de base, des sous-ensembles correspondant en nombre à au plus un nombre prédéterminé de bits. Les sous-ensembles ainsi formés comprennent ceux constitués au plus d'un seul vecteur de base et de sous-ensembles de vecteurs de coefficient formés à partir de l'ensemble de vecteurs de coefficient et déterminés en fonction des sous-ensembles de vecteurs de base formés.

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