Linear prediction filter coefficient quantizer & filter set

Details Linear prediction filter coefficient quantizer & filter set Linear prediction filter coefficient quantizer & filter set

H - Electricity

04

M

H04M 11/06 (2006.01) G10L 19/06 (2006.01)

Patent

CA 2161988

A simultaneous voice and data (SVD) modem includes a preemphasis filter for processing an audio source signal, e.g., a voice signal, before transmission to a far-end SVD-capable modem. The preemphasis filter implements a second order linear predictor in which a quantized set of predictor coefficients are selected directly from the normalized autocorrelation coefficients. In addition, an index is associated with the selected set of predictor coefficients. This index is transmitted to an oppositeSVD-capable modem, which thereby allows the opposite SVD-capable modem to selectthe same set of predictor coefficients for use in recovering the voice signal at the opposite endpoint.

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