Coding method, decoding method, apparatuses thereof,...

H - Electricity – 03 – M

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H03M 7/30 (2006.01) G10L 19/00 (2006.01)

Patent

CA 2711539

A coding method with a small error is provided. In the coding method of the present invention, a normalization value obtained from an input signal is corrected for an error calculated from an input and output in vector quantization and is then quantized. The coding method includes a normalization stage of normalizing the input signal in accordance with the normalization value of the input signal, calculated in each frame; a dividing stage of dividing the normalized frame into divided input signal sequences in accordance with a predetermined rule; a vector quantization stage of applying vector quantization to the divided input signal sequences to generate a vector quantization index; and a normalization value correction stage of correcting the normalization value of the input signal for the error obtained from the input and output in the vector quantization stage.

L'invention porte sur un procédé de codage à faible erreur. Le procédé de codage corrige une valeur normalisée obtenue d'un signal d'entrée par une valeur d'erreur obtenue de l'entrée/sortie au moment d'une quantification vectorielle, et quantifie ensuite la valeur corrigée. A cette fin, le procédé de codage consiste à normaliser le signal d'entrée en fonction de la valeur normalisée d'un signal d'entrée obtenue pour chaque image ; à diviser les images normalisées en une séquence de signaux d'entrée divisée selon une règle prédéterminée ; à quantifier vectoriellement la séquence de signaux d'entrée divisée afin de générer un index de quantification vectorielle ; et à corriger la valeur normalisée du signal d'entrée par la valeur d'erreur obtenue de l'entrée/sortie au moment de l'étape de quantification vectorielle.

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