Name
Abstract | ||
|---|---|---|
A discrete cosine transform (DCT) domain speech enhancement algorithm is proposed that models the evolution of speech DCT coefficients as a time-varying autoregressive process. Rao-Blackwellized particle filter (RBPF) techniques are used to estimate the model parameters and recover the clean signal coefficients. Using very low-order models for each coefficient and operating at a decimated frame rate, the proposed approach provides a significant complexity reduction compared to the standard full-band RBPF speech enhancement algorithm. In addition to the complexity gains, performance is also improved. Modeling the speech signal in the DCT-domain is shown to provide a better fit in spectral troughs, leading to more noise reduction and less speech distortion. To illustrate possible frequency-dependent processing strategies, a hybrid structure is proposed that offers a complexity/performance trade-off by substituting a simple DCT Wiener filter for the DCT-RBPF in some bands. In comparisons with high performing speech enhancement algorithms using wideband speech and noise, the proposed DCT-RBPF algorithm achieves higher scores on objective quality and intelligibility measures. |
Year | DOI | Venue |
|---|---|---|
2010 | 10.1016/j.specom.2010.05.005 | Speech Communication |
Keywords | Field | DocType |
speech enhancement,speech signal,noise reduction,speech distortion,discrete cosine,discrete cosine transform (dct),speech dct coefficient,particle filtering,wideband speech,standard full-band rbpf speech,domain speech enhancement algorithm,proposed dct-rbpf algorithm,complexity gain,particle filter speech enhancement,discrete cosine transform,complexity reduction,autoregressive process,particle filter,wiener filter | Speech enhancement,Noise reduction,Wiener filter,Speech processing,Signal processing,Computer science,Discrete cosine transform,Reduction (complexity),Speech recognition,Intelligibility (communication) | Journal |
Volume | Issue | ISSN |
52 | 9 | Speech Communication |
Citations | PageRank | References |
2 | 0.39 | 19 |
Authors | ||
3 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Brady Laska | 1 | 2 | 0.39 |
| Miodrag Bolić | 2 | 121 | 13.29 |
| Rafik Goubran | 3 | 47 | 5.91 |