Inventor · disambiguated record
Karl Hellwig
Also filed as: HELLWIG KARL · HELLWIG KARL-RUEDIGER
45 granted patents·4 pending applications·955 citations·filing 1984–2020
98Inventor score
Top patents by PatentIndex Score
49 records- 0195US8634838B2Connection set-up between two terminalsHELLWIG KARL·Filed 2010·Granted Jan 21, 2014·71 cites·51 claims
- 0291US6856612B1Methods and systems for call routing and codec negotiation in hybrid voice/data/internet/wireless systemsERICSSON TELEFON AB L M·Filed 2000·Granted Feb 15, 2005·102 cites·28 claims
- 0385US5490136AMethod of controlling transmission on a same radio channel of variable-rate information streams in radio communication systemsCSELT CENTRO STUDI LAB TELECOM·Filed 1994·Granted Feb 6, 1996·165 cites·25 claims
- 0484US6611804B1Universal TTY/TDD devices for robust text and data transmission via PSTN and cellular phone networksERICSSON TELEFON AB L M·Filed 2000·Granted Aug 26, 2003·78 cites·8 claims
- 0583US4889756ASheet-like, multilayer, laser-optical recording materialBASF AG·Filed 1988·Granted Dec 26, 1989·33 cites·28 claims
- 0681US10148391B2Method and apparatus for removing jitter in audio data transmissionERICSSON TELEFON AB L M·Filed 2016·Granted Dec 4, 2018·3 cites·14 claims
- 0779US7500018B2Efficient in-band signaling for discontinuous transmission and configuration changes in adaptive multi-rate communications systemsERICSSON TELEFON AB L M·Filed 2003·Granted Mar 3, 2009·34 cites·29 claims
- 0879US6345251B1Low-rate speech coder for non-speech data transmissionERICSSON TELEFON AB L M·Filed 1999·Granted Feb 5, 2002·111 cites·8 claims
- 0978US5982766APower control method and system in a TDMA radio communication systemERICSSON TELEFON AB L M·Filed 1997·Granted Nov 9, 1999·63 cites·12 claims
- 1077US8374587B2Method for codec negotiation and selectionERICSSON TELEFON AB L M·Filed 2008·Granted Feb 12, 2013·9 cites·21 claims
- 1176US6295302B1Alternating speech and data transmission in digital communications systemsERICSSON TELEFON AB L M·Filed 1998·Granted Sep 25, 2001·80 cites·52 claims
- 1275US8595018B2Technique for controlling codec selection along a complex call pathKAMPMANN DIRK·Filed 2007·Granted Nov 26, 2013·6 cites·26 claims
- 1375US6826404B2Tone signalling with TFO communication linksERICSSON TELEFON AB L M·Filed 2001·Granted Nov 30, 2004·15 cites·16 claims
- 1475US6658381B1Methods and systems for robust frame type detection in systems employing variable bit ratesERICSSON TELEFON AB L M·Filed 2000·Granted Dec 2, 2003·33 cites·15 claims
- 1574US9060350B2Connection set-up between two terminalsERICSSON TELEFON AB L M·Filed 2013·Granted Jun 16, 2015·3 cites·30 claims
- 1672US9439109B2Assignment and handover in a radio communication networkKAMPMANN DIRK·Filed 2008·Granted Sep 6, 2016·3 cites·12 claims
- 1771US9204276B2Relaying a private emergency point to a public emergency pointHELLWIG KARL·Filed 2011·Granted Dec 1, 2015·5 cites·14 claims
- 1868US8817617B2Individual codec pathway impairment indicator for use in a communicationHELLWIG KARL·Filed 2005·Granted Aug 26, 2014·4 cites·23 claims
- 1967US5687184AMethod and circuit arrangement for speech signal transmissionPHILIPS CORP·Filed 1994·Granted Nov 11, 1997·27 cites·15 claims
- 2067US2020205046A1Assignment and Handover in a Radio Communication NetworkERICSSON TELEFON AB L M·Filed 2020·Application pending·0 cites
- 2166US8351973B2Short message service (SMS) over service access point identifier 0 (SAPI-0)ERICSSON TELEFON AB L M·Filed 2009·Granted Jan 8, 2013·3 cites·19 claims
- 2263US7620052B2Method and node for selecting a codec type or configuration by extending the list comprising codecs for transcoder/tandem free operation by further codecs supported by the nodeERICSSON TELEFON AB L M·Filed 2004·Granted Nov 17, 2009·8 cites·18 claims
- 2362US10645620B2Assignment and handover in a radio communication networkERICSSON TELEFON AB L M·Filed 2018·Granted May 5, 2020·0 cites·22 claims
- 2458US6163577ASource/channel encoding mode control method and apparatusERICSSON TELEFON AB L M·Filed 1997·Granted Dec 19, 2000·26 cites·11 claims
- 2557US10651976B2Method and apparatus for removing jitter in audio data transmissionERICSSON TELEFON AB L M·Filed 2018·Granted May 12, 2020·0 cites·16 claims
- 2657US10075884B2Assignment and handover in a radio communication networkERICSSON TELEFON AB L M·Filed 2016·Granted Sep 11, 2018·0 cites·24 claims
- 2757US7328038B2Power control in mobile communication systemsERICSSON TELEFON AB L M·Filed 2003·Granted Feb 5, 2008·6 cites·12 claims
- 2853US7933258B2Bypassing transcoding operations in a communication networkERICSSON TELEFON AB L M·Filed 2003·Granted Apr 26, 2011·4 cites·23 claims
- 2952US4607362AMethod of and circuit arrangement for establishing conference connections in a switching systemPHILIPS CORP·Filed 1984·Granted Aug 19, 1986·9 cites·21 claims
- 3050US10750574B2Local switchingKAMPMANN DIRK·Filed 2009·Granted Aug 18, 2020·0 cites·25 claims
- 3150US7792119B2Method for a connection through a core networkERICSSON TELEFON AB L M·Filed 2001·Granted Sep 7, 2010·2 cites·20 claims
- 3249US8634326B2Method and node for the control of a connection in a communication networkWITZEL ANDREAS·Filed 2007·Granted Jan 21, 2014·0 cites·29 claims
- 3348US8369267B2Technique for controlling establishment of a tandem-free transcoder operationERICSSON TELEFON AB L M·Filed 2007·Granted Feb 5, 2013·0 cites·12 claims
- 3446US5799201ASignal processorPHILIPS CORP·Filed 1996·Granted Aug 25, 1998·20 cites·6 claims
- 3545US7062431B2Speech analyzing stage and method for analyzing a speech signalERICSSON TELEFON AB L M·Filed 2002·Granted Jun 13, 2006·2 cites·26 claims
- 3644US9497758B2Late Abis activationHELLWIG KARL·Filed 2009·Granted Nov 15, 2016·0 cites·20 claims
- 3744US8442054B2Method and core network node for establishing a connection through a core networkHELLWIG KARL·Filed 2010·Granted May 14, 2013·0 cites·19 claims
- 3844US2009034425A1Call case controlled bler target settingERICSSON TELEFON AB L M·Filed 2003·Application pending·0 cites
- 3943US7606563B2Distributed telephone conference with speech codersERICSSON TELEFON AB L M·Filed 2002·Granted Oct 20, 2009·1 cites·25 claims
- 4042US2002091511A1Mobile terminal controllable by spoken utterancesFiled 2001·Application pending·0 cites
- 4141US2005018769A1Transcoder-free operation in mobile communication systemFiled 2001·Application pending·0 cites
- 4238US9917673B2Rate control in circuit switched systemsERICSSON TELEFON AB L M·Filed 2016·Granted Mar 13, 2018·0 cites·14 claims
- 4337US8913979B2Methods, devices and computer programs for supporting emergency communicationsHELLWIG KARL·Filed 2012·Granted Dec 16, 2014·0 cites·26 claims
- 4437US6466789B1Method and device for avoiding interruptions in voice transmissionsERICSSON TELEFON AB L M·Filed 1999·Granted Oct 15, 2002·9 cites·20 claims
- 4536US9167409B2Music control signal dependent activation of a voice activity detectorHELLWIG KARL·Filed 2010·Granted Oct 20, 2015·0 cites·6 claims
- 4634US5602766AMethod of and device for forming the sum of a chain of productsPHILIPS CORP·Filed 1993·Granted Feb 11, 1997·8 cites·14 claims
- 4733US5912923ASystem for transmitting coded speech signalsU S PHILIPS CORPORATON·Filed 1995·Granted Jun 15, 1999·6 cites·20 claims
- 4831US5657421ASpeech signal transmitter wherein coding is maintained during speech pauses despite substantial shut down of the transmitterPHILIPS CORP·Filed 1994·Granted Aug 12, 1997·6 cites·6 claims
- 4930US9674876B2Local data bi-casting between core network and radio accessHODGES PHILIP·Filed 2011·Granted Jun 6, 2017·0 cites·12 claims
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