Roar Hagen

According to our database, Roar Hagen authored at least 15 papers between 1990 and 2004.

Collaborative distances:

• Dijkstra number of five.
• Erdős number of four.

2004

Internet Low Bit Rate Codec (iLBC).

Søren Vang Andersen, Alan Duric, Henrik Astrom, Roar Hagen, W. Bastiaan Kleijn, Jan Linden

RFC, December, 2004

1999

Robust Vector Quantization by a Linear Mapping of a Block Code.

Roar Hagen, Per Hedelin

IEEE Trans. Inf. Theory, 1999

Voicing-specific LPC quantization for variable-rate speech coding.

Roar Hagen, Erdal Paksoy, Allen Gersho

IEEE Trans. Speech Audio Process., 1999

An 8 kbit/s ACELP coder with improved background noise performance.

Roar Hagen, Erik Ekudden

Proceedings of the 1999 IEEE International Conference on Acoustics, 1999

1998

ITU-t g.729 extension at 6.4 kbps.

Erik Ekudden, Roar Hagen, Björn Johansson, Shinji Hayashi, Akitoshi Kataoka, Sachiko Kurihara

Proceedings of the 5th International Conference on Spoken Language Processing, Incorporating The 7th Australian International Speech Science and Technology Conference, Sydney Convention Centre, Sydney, Australia, 30th November, 1998

Removal of sparse-excitation artifacts in CELP.

Roar Hagen, Erik Ekudden, Björn Johansson, W. Bastiaan Kleijn

Proceedings of the 1998 IEEE International Conference on Acoustics, 1998

1997

Using a perception-based frequency scale in waveform interpolation.

Jes Thyssen, W. Bastiaan Kleijn, Roar Hagen

Proceedings of the 1997 IEEE International Conference on Acoustics, 1997

1996

Robust LPC spectrum quantization-vector quantization by a linear mapping of a block code.

Roar Hagen

IEEE Trans. Speech Audio Process., 1996

On memoryless quantization in speech coding.

W. Bastiaan Kleijn, Roar Hagen

IEEE Signal Process. Lett., 1996

A low-complexity waveform interpolation coder.

W. Bastiaan Kleijn, Yair Shoham, Deep Sen, Roar Hagen

Proceedings of the 1996 IEEE International Conference on Acoustics, 1996

1995

On Robust LPC-spectrum Coding and Vector Quantization.

Roar Hagen

PhD thesis, 1995

Variable rate spectral quantization for phonetically classified CELP coding.

Roar Hagen, Erdal Paksoy, Allen Gersho

Proceedings of the 1995 International Conference on Acoustics, 1995

1994

Spectral quantization of cepstral coefficients.

Roar Hagen

Proceedings of ICASSP '94: IEEE International Conference on Acoustics, 1994

1993

Robust vector quantization in spectral coding.

Roar Hagen, Per Hedelin

Proceedings of the IEEE International Conference on Acoustics, 1993

1990

Low bit-rate spectral coding in CELP, a new LSP-method.

Roar Hagen, Per Hedelin

Proceedings of the 1990 International Conference on Acoustics, 1990