Postfilter and method of postfiltering

Details Postfilter and method of postfiltering Postfilter and method of postfiltering

H - Electricity

03

H

H03H 17/02 (2006.01) G10L 19/14 (2006.01)

Patent

CA 2156593

A second spectrum parameter of which degree is lower than that of a first spectrum parameter is calculated based on the first spectrum parameter that is output from an encoder. A spectrum postfilter generates a transfer function having a denominator and a numerator wherein said first spectrum parameter is included in said denominator and said second spectrum parameter is included in said numerator, and filters the reduced signal with this transfer function. In addition, it adaptively generates a compensation coefficient based on the first and second parameters. A compensation filter generates a transfer function based the compensation coefficient and filters an output of the spectrum postfilter with this transfer function.

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