Name
Title | ||
|---|---|---|
Non-uniform speech/audio coding exploiting predictability of temporal evolution of spectral envelopes |
Abstract | ||
|---|---|---|
We describe novel speech/audio coding technique designed to operate at medium bit-rates. Unlike classical state-of-the-art coders that are based on short-term spectra, our approach uses relatively long temporal segments of audio signal in critical-band-sized sub-bands. We apply auto-regressive model to approximate Hilbert envelopes in frequency sub-bands. Residual signals (Hilbert carriers) are demodulated and thresholding functions are applied in spectral domain. The Hilbert envelopes and carriers are quantized and transmitted to the decoder. Our experiments focused on designing speech/audio coder to provide broadcast radio-like quality audio around 15-25kbps. Obtained objective quality measures, carried out on standard speech recordings, were compared to the state-of-the-art 3GPP-AMR speech coding system. |
Year | Venue | Keywords |
|---|---|---|
2007 | TSD | approximate hilbert envelope,radio-like quality audio,hilbert envelope,audio coding technique,audio coder,spectral envelope,obtained objective quality measure,hilbert carrier,audio signal,temporal evolution,non-uniform speech,standard speech recording,novel speech,auto regressive,lossy compression,speech coding,audio signal processing |
Field | DocType | Volume |
Audio signal,Speech processing,Speech coding,Adaptive Multi-Rate audio codec,Voice activity detection,Computer science,Speech recognition,Audio signal flow,Linear predictive coding,Acoustic model | Conference | 4629 |
ISSN | ISBN | Citations |
0302-9743 | 3-540-74627-7 | 2 |
PageRank | References | Authors |
0.46 | 5 | 4 |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Petr Motlícek | 1 | 105 | 10.60 |
| Hynek Hermansky | 2 | 3298 | 510.27 |
| Sriram Ganapathy | 3 | 252 | 39.62 |
| Harinath Garudadri | 4 | 171 | 23.32 |