A subjective performance study of a sinusoidal speech coding model. - Ari Heikkinen (EUSIPCO, 2000)

Coding method for successive pitch periods. - Ari Heikkinen; Vesa T. Ruoppila; Samuli Pietilä (INTERSPEECH, 2001)

Objective evaluation of methods for quantization of variable-dimension spectral vectors in WI speech coding. - Jani Nurminen; Ari Heikkinen; Jukka Saarinen (INTERSPEECH, 2001)

A 4 kb/s hybrid MELP/CELP speech coding candidate for ITU standardization. - Alan McCree; Jacek Stachurski; Takahiro Unno; Ali Erdem Ertan; Erdal Paksoy; Vishu Viswanathan; Ari Heikkinen; Anssi Rämö; Sakari Himanen; Peter Blöcher; Oliver Dressler (ICASSP, 2002)

A novel quantization scheme for the noise-like component in waveform interpolation speech coding. - Jani Nurminen; Ari Heikkinen; Jukka Saarinen (ICASSP, 2002)

On methods for perfect reconstruction WI speech coding with preprocessing. - Mikko Tammi; Ari Heikkinen; Jukka Saarinen (Speech Commun., 2002)

Hybrid MELP/CELP coding at bit rates from 6.4 to 2.4 kb/s. - Jacek Stachurski; Alan McCree; Vishu Viswanathan; Ari Heikkinen; Anssi Rämö; Sakari Himanen; Peter Blöcher (ICASSP (2), 2003)

Exploiting time warping in AMR-NB and AMR-WB speech coders. - Lasse Laaksonen; Sakari Himanen; Ari Heikkinen; Jani Nurminen (INTERSPEECH, 2003)

Perceptual irrelevancy removal in narrowband speech coding. - Marja Lahdekorpi; Jani Nurminen; Ari Heikkinen; Jukka Saarinen (INTERSPEECH, 2003)

Multi-mode matrix quantizer for low bit rate LSF quantization. - Ulpu Sinervo; Jani Nurminen; Ari Heikkinen; Jukka Saarinen (INTERSPEECH, 2003)

Segmental speech coding model for storage applications. - Anssi Rämö; Jani Nurminen; Sakari Himanen; Ari Heikkinen (INTERSPEECH, 2004)

Development of a 4 kbit/s hybrid sinusoidal/CELP speech coder. - Ari Heikkinen (Speech Commun., 2004)