Inventor

HELLWIG KARL

DE44 patents

⚠️ This page may combine multiple inventors who share the name “HELLWIG KARL”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

HELLWIG KARL

ERICSSON TELEFON AB L M

Low-rate speech coder for non-speech data transmission

Power control method and system in a TDMA radio communication system

Methods and systems for call routing and codec negotiation in hybrid voice/data/internet/wireless systems

Alternating speech and data transmission in digital communications systems

Universal TTY/TDD devices for robust text and data transmission via PSTN and cellular phone networks

Source/channel encoding mode control method and apparatus

Efficient in-band signaling for discontinuous transmission and configuration changes in adaptive multi-rate communications systems

Methods and systems for robust frame type detection in systems employing variable bit rates

Method 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 node

Tone signalling with TFO communication links

Method for codec negotiation and selection

Method and device for avoiding interruptions in voice transmissions

Method and apparatus for removing jitter in audio data transmission

Power control in mobile communication systems

Connection set-up between two terminals

Short message service (SMS) over service access point identifier 0 (SAPI-0)

Bypassing transcoding operations in a communication network

Method for a connection through a core network

Speech analyzing stage and method for analyzing a speech signal

Method and apparatus for removing jitter in audio data transmission

Assignment and handover in a radio communication network

Assignment and handover in a radio communication network

Technique for controlling establishment of a tandem-free transcoder operation

Distributed telephone conference with speech coders

Rate control in circuit switched systems

HELLWIG KARL

Connection set-up between two terminals

Individual codec pathway impairment indicator for use in a communication

Relaying a private emergency point to a public emergency point

Method and core network node for establishing a connection through a core network

Late Abis activation

Methods, devices and computer programs for supporting emergency communications

Music control signal dependent activation of a voice activity detector

PHILIPS CORP

Method and circuit arrangement for speech signal transmission

Signal processor

Method of and circuit arrangement for establishing conference connections in a switching system

Method of and device for forming the sum of a chain of products

Speech signal transmitter wherein coding is maintained during speech pauses despite substantial shut down of the transmitter

KAMPMANN DIRK

Assignment and handover in a radio communication network

Technique for controlling codec selection along a complex call path

Local switching

CSELT CENTRO STUDI LAB TELECOM

Method of controlling transmission on a same radio channel of variable-rate information streams in radio communication systems

U S PHILIPS CORPORATON

System for transmitting coded speech signals

WITZEL ANDREAS

Method and node for the control of a connection in a communication network

HODGES PHILIP

Local data bi-casting between core network and radio access