logo Idiap Research Institute        
 [BibTeX] [Marc21]
Non-Uniform Speech/Audio Coding Exploiting Predictability of Temporal Evolution of Spectral Envelopes
Type of publication: Conference paper
Citation: motlicek:TSD:2007
Booktitle: Tenth International Conference on TEXT, SPEECH and DIALOGUE (TSD)
Year: 2007
Note: IDIAP-RR 06-30
Crossref: motlicek:rr06-30:
Abstract: 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.
Userfields: ipdmembership={speech},
Projects Idiap
Authors Motlicek, Petr
Hermansky, Hynek
Ganapathy, Sriram
Garudadri, Harinath
Added by: [UNK]
Total mark: 0
  • motlicek-TSD-2007.pdf
  • motlicek-TSD-2007.ps.gz