Karl Hellwig

According to our database, Karl Hellwig authored at least 6 papers between 1988 and 2015.

Collaborative distances:

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

2015

System aspects of the 3GPP evolution towards enhanced voice services.

Stefan Bruhn, Tomas Frankkila, Frédéric Gabin, Karl Hellwig, Maria Hultström

Proceedings of the 2015 IEEE Global Conference on Signal and Information Processing, 2015

2010

RTP Payload Format for Global System for Mobile Communications Half Rate (GSM-HR).

Xiaodong Duan, Shuaiyu Wang, Magnus Westerlund, Karl Hellwig, Ingemar Johansson

RFC, October, 2010

2001

The cellular text telephone modem - the solution for supporting text telephone functionality in GSM networks.

Matthias Dörbecker, Karl Hellwig, Fredrik Jansson, Tomas Frankkila

Proceedings of the IEEE International Conference on Acoustics, 2001

1994

A VR-CELP codec implementation for CDMA mobile communications.

Luca Cellario, Daniele Sereno, Mario Giani, Peter Blöcher, Karl Hellwig

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

1988

A regular-pulse excited linear predictive codec.

Peter Vary, Rudolf Hofmann, Karl Hellwig, Robert J. Sluyter

Speech Commun., 1988

Speech codec for the European mobile radio system.

Peter Vary, Karl Hellwig, Rudolf Hofmann, Robert J. Sluyter, Claude R. Galand, Michele M. Rosso

Proceedings of the IEEE International Conference on Acoustics, 1988