Patent ID: 7590523

Claim:
A speech post-processing method for use by a speech post-processor to generate a post-processed speech signal, the speech post-processing method comprising: decoding an encoded speech signal to obtain frequency domain coefficients representative of a speech signal divided into a plurality of sub-bands; generating an envelope modification factor using the frequency domain coefficients; generating a fine structure modification factor using the frequency domain coefficients; determining a gain based on the envelope modification factor and an envelope; modifying the frequency domain coefficients as a result of multiplying the frequency domain coefficients by the gain, the envelope modification factor and the fine structure modification factor to provide post-processed frequency domain coefficients; and generating the post-processed speech signal using the post-processed frequency domain coefficients; wherein the determining the gain is based on: g ⁢ ⁢ 1 = ∑ k = 0 9 ⁢ ENV ⁡ ( k ) ∑ k = 0 9 ⁢ FAC ⁢ ⁢ 1 ⁢ ( k ) * ENV ⁡ ( k ) where g1 is the gain, FAC1 is the envelope modification factor and ENV is the envelope.