| 2004 | Interspeech | Segmental speech coding model for storage applications. | Anssi Rm, Jani Nurminen, Sakari Himanen, Ari Heikkinen |
| 2003 | ICASSP | Hybrid MELP/CELP coding at bit rates from 6.4 to 2.4 kb/s. | Jacek Stachurski, Alan McCree, Vishu Viswanathan, Ari Heikkinen, Anssi Rm, Sakari Himanen, Peter Blcher |
| 2003 | Interspeech | Exploiting time warping in AMR-NB and AMR-WB speech coders. | Lasse Laaksonen, Sakari Himanen, Ari Heikkinen, Jani Nurminen |
| 2003 | Interspeech | Perceptual irrelevancy removal in narrowband speech coding. | Marja Lahdekorpi, Jani Nurminen, Ari Heikkinen, Jukka Saarinen |
| 2003 | Interspeech | Multi-mode matrix quantizer for low bit rate LSF quantization. | Ulpu Sinervo, Jani Nurminen, Ari Heikkinen, Jukka Saarinen |
| 2002 | ICASSP | 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 Rm, Sakari Himanen, Peter Blcher, Oliver Dressler |
| 2002 | ICASSP | A novel quantization scheme for the noise-like component in waveform interpolation speech coding. | Jani Nurminen, Ari Heikkinen, Jukka Saarinen |
| 2001 | Interspeech | Coding method for successive pitch periods. | Ari Heikkinen, Vesa T. Ruoppila, Samuli Pietil |
| 2001 | Interspeech | Objective evaluation of methods for quantization of variable-dimension spectral vectors in WI speech coding. | Jani Nurminen, Ari Heikkinen, Jukka Saarinen |