Speech-coding parameter sequence reconstruction by...

H - Electricity – 03 – M

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H03M 7/00 (2006.01) G10L 19/00 (2006.01) G10L 9/00 (1995.01) G10L 9/14 (1995.01)

Patent

CA 2156558

A method and apparatus which allows the transmission of the perceptually important features of a speech-coding parameter at a low bit rate. The speech coding parameter may, for example, comprise the signal power of the speech. The parameter is processed on a block by block basis. The parameter value at the block boundaries is transmitted by conventional methods such as, for example, by means of differential quantization. The shape of the reconstructed parameter contour within block boundaries is based on a classification. The classification determines perceptually important features of the parameter contour within a block. Based on the result of the classification as well as the parameter values at the block boundaries, a parameter contour (within the block) is selected from an inventory of possible parameter contours.

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