Coding model selection

G - Physics – 10 – L

Patent

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Details

G10L 19/14 (2006.01) G10L 19/08 (2006.01)

Patent

CA 2555768

The invention relates to an encoder (200) comprising an input (201) for inputting frames of an audio signal, a LTP analysis block (209) for performing a LTP analysis to the frames of the audio signal to form LTP parameters on the basis of the properties of the audio signal, and at least a first excitation block (206) for performing a first excitation for frames of the audio signal, and a second excitation block (207) for performing a second excitation for frames of the audio signal. The encoder (200) further comprises a parameter analysis block (202) for analysing said LTP parameters, and an excitation selection block (203) for selecting one excitation block among said first excitation block (206) and said second excitation block (207) for performing the excitation for the frames of the audio signal on the basis of the parameter analysis. The invention also relates to a device, a system, a method, a module and a computer program product.

L'invention concerne un codeur (200) qui comprend une entrée (201) permettant d'entrer des trames d'un signal audio, un bloc d'analyse LTP (209) permettant de procéder à une analyse LTP des trames du signal audio afin que soient formés des paramètres LTP sur la base des propriétés du signal audio, et au moins un premier bloc d'excitation (206) permettant d'assurer une première excitation des trames du signal audio, et un deuxième bloc d'excitation (207) permettant d'assurer une deuxième excitation des trames du signal audio. Le codeur (200) comprend en outre un bloc d'analyse de paramètres (202) qui permet d'analyser lesdits paramètres LTP, et un bloc de sélection d'excitation (203) qui permet de sélectionner un bloc d'excitation entre le premier bloc d'excitation (206) et le deuxième bloc d'excitation (207) afin d'assurer l'excitation des trames du signal audio sur la base de l'analyse des paramètres. L'invention concerne également un dispositif, un système, un procédé, un module et un produit-programme informatique.

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