Karl Hellwig

Publication Activity (10 Years)

Years Active: 1988-2015
Publications (10 Years): 0

Top Topics

Information Services

Genetic Algorithm

Interactive Voice Response

Top Venues

Publications

Stefan Bruhn, Tomas Frankkila, Frédéric Gabin, Karl Hellwig, Maria Hultström
System aspects of the 3GPP evolution towards enhanced voice services. GlobalSIP (2015)
Xiaodong Duan, Shuaiyu Wang, Magnus Westerlund, Karl Hellwig, Ingemar Johansson
RTP Payload Format for Global System for Mobile Communications Half Rate (GSM-HR). RFC 5993 (2010)
Matthias Dörbecker, Karl Hellwig, Fredrik Jansson, Tomas Frankkila
The cellular text telephone modem - the solution for supporting text telephone functionality in GSM networks. ICASSP (2001)
Luca Cellario, Daniele Sereno, Mario Giani, Peter Blöcher, Karl Hellwig
A VR-CELP codec implementation for CDMA mobile communications. ICASSP (1) (1994)
Peter Vary, Karl Hellwig, Rudolf Hofmann, Robert J. Sluyter, Claude R. Galand, Michele M. Rosso
Speech codec for the European mobile radio system. ICASSP (1988)
Peter Vary, Rudolf Hofmann, Karl Hellwig, Robert J. Sluyter
A regular-pulse excited linear predictive codec. Speech Commun. 7 (2) (1988)