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This letter presents a perceptually weighted analysis-by-synthesis vector quantization (VQ) algorithm for low bit rate MFCC codec. Different from conventional VQ of mel-frequency cepstral coefficients (MFCCs) vector, this algorithm uses an analysis-by-synthesis technique and aims to minimize the perceptually weighted spectral reconstruction distortion rather than the distortion of MFCCs vector itself...
This paper presents a high quality speech reconstruction method from Mel-frequency cepstral coefficients (MFCC). Due to the sparse characteristic of the power spectrum of speech, the ℓ1-norm minimization method is used to tackle the under-determined nature of the speech reconstruction problem. The phase spectrum is recovered by the well-known LSE-ISTFTM algorithm. Experimental results demonstrate...
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