CONF Ganapathy_AES2009_2009/IDIAP MDCT for Encoding Residual Signals in Frequency Domain Linear Prediction Ganapathy, Sriram Motlicek, Petr Hermansky, Hynek http://publications.idiap.ch/index.php/publications/showcite/Ganapathy_Idiap-RR-34-2009 Related documents Audio Engineering Society (AES) - Audio Engineering Society (AES,',','), 127th Convention 127th Convention Preprint 7921 2009 Audio Engineering Society, 60 East 42nd Street, New York, New York 10165-2520, USA; New York, USA October 2009 http://www.aes.org/events/127/ URL Frequency domain linear prediction (FDLP) uses autoregressive models to represent Hilbert envelopes of relatively long segments of speech/audio signals. Although the basic FDLP audio codec achieves good quality of the reconstructed signal at high bit-rates, there is a need for scaling to lower bit-rates without degrading the reconstruction quality. Here, we present a method for improving the compression efficiency of the FDLP codec by the application of the modified discrete cosine transform (MDCT) for encoding the FDLP residual signals. In the subjective and objective quality evaluations, the proposed FDLP codec provides competent quality of reconstructed signal compared to the state-of-the-art audio codecs for the 32 − 64 kbps range. REPORT Ganapathy_Idiap-RR-34-2009/IDIAP MDCT for Encoding Residual Signals in Frequency Domain Linear Prediction Ganapathy, Sriram Motlicek, Petr Hermansky, Hynek Idiap-RR-34-2009 2009 Idiap Rue Marconi 19. Martigny December 2009 Frequency domain linear prediction (FDLP) uses autoregressive models to represent Hilbert envelopes of relatively long segments of speech/audio signals. Although the basic FDLP audio codec achieves good quality of the reconstructed signal at high bit-rates, there is a need for scaling to lower bit-rates without degrading the reconstruction quality. Here, we present a method for improving the compression efficiency of the FDLP codec by the application of the modified discrete cosine transform (MDCT) for encoding the FDLP residual signals. In the subjective and objective quality evaluations, the proposed FDLP codec provides competent quality of reconstructed signal compared to the state-of-the-art audio codecs for the 32 − 64 kbps range.