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 [BibTeX] [Marc21]
Audio Coding Based on Long Temporal Contexts
Type of publication: Idiap-RR
Citation: motlicek:rr06-30
Number: Idiap-RR-30-2006
Year: 2006
Institution: IDIAP
Abstract: We describe novel audio coding technique designed to be utilized at medium bit-rates. Unlike classical state-of-the-art audio 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 audio coder to provide broadcast radio-like quality audio around $10-20$kbps. Objective quality measures indicate comparable performance with the 3GPP-AMR speech codec standard for both speech and non-speech signals.
Userfields: ipdmembership={speech},
Projects Idiap
Authors Motlicek, Petr
Hermansky, Hynek
Garudadri, Harinath
Srinivasamurthy, Naveen
Crossref by motlicek:TSD:2007
Added by: [UNK]
Total mark: 0
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