%Aigaion2 BibTeX export from Idiap Publications
%Sunday 22 December 2024 04:32:26 AM

@TECHREPORT{Ganapathy_Idiap-RR-33-2009,
         author = {Ganapathy, Sriram and Motlicek, Petr and Hermansky, Hynek},
       projects = {Idiap},
          month = {12},
          title = {Autoregressive Models of Amplitude Modulations in Audio Compression},
           type = {Idiap-RR},
         number = {Idiap-RR-33-2009},
           year = {2009},
    institution = {Idiap},
        address = {Rue Marconi 19, Martigny},
       abstract = {We present a scalable medium bit-rate wide-band audio coding technique based on frequency domain
linear prediction (FDLP). FDLP is an efficient method for representing the long-term amplitude modulations
of speech/audio signals using autoregressive models. For the proposed audio codec, relatively long temporal segments (1000 ms) of the input audio signal are decomposed into a set of critically sampled sub-bands using a quadrature mirror filter (QMF) bank. The technique of FDLP is applied on each sub-band to model the sub-band temporal envelopes. The residual of the linear prediction, which represents the frequency modulations in the sub-band signal [1], are encoded and transmitted along with the envelope parameters. These steps are reversed at the decoder to reconstruct the signal. The proposed codec utilizes a simple signal independent non-adaptive compression mechanism for a wide class of speech and audio signals. The subjective and objective quality evaluations show that the reconstruction signal quality for the proposed FDLP codec compares well with the state-of-the-art audio codecs in the 32-64 kbps range.},
            pdf = {https://publications.idiap.ch/attachments/reports/2009/Ganapathy_Idiap-RR-33-2009.pdf}
}