Class 370/269 - Including cancellation of certain signals

Subclass of Class 370 - Multiplex communications
Definition: Subject matter wherein the summation is combined with a
No. of patents: 29
Last issue date: 08/16/2011

Number	Title	Issue Date
8000269	Call processing with voice over internet protocol transmission Disclosed are systems and methods which provide call processing for a plurality of telephones at a site for which calling services are provided. Call control functionality is distributed to remote locations using data networks according to embodiments. The aforement...	08/16/2011
7512083	Single chip multi-antenna wireless data processor A single chip integrated circuit wireless data processor demodulates N separate data signals from M separate antennas simultaneously. The multi-antenna processor can be coupled to a baseband processor on the IC, so that it responds to changing channel conditions bet...	03/31/2009
7415499	Method and apparatus for listening for incoming calls on multiple port/socket combinations In one embodiment, the invention provides a method comprising loading a set of transport components into a memory; initializing each transport component of the set of transport components to listen on a particular conferencing interface using a listen string to asso...	08/19/2008
7397772	Method and apparatus for acoustic echo cancellation in a communication system providing TTY/TDD service A method and apparatus are disclosed for canceling acoustic echo generated during transmission of text information in a communication system supporting a TTY/TDD service. When a mobile-to-land call is established between a mobile subscriber and a PSTN subscriber, a ...	07/08/2008
7305216	Transmitting and receiving arrangement with interference signal suppression control A transmitting and receiving arrangement is disclosed having a transmission path, a reception path, and a control device for suppression of interference signals which are produced by crosstalk from the transmission path to the reception path. The control device inpu...	12/04/2007
7302050	Method and system for independent participant control of audio during multiparty communication sessions A method and system for independent participant control of audio during a multiparty communication session includes receiving an audio stream from each of a plurality of participants to a multiparty communication connection. An audio control signal is received from ...	11/27/2007
7280823	Method and apparatus for determining the context of a handheld device A system and method for determining the context of a wireless device is disclosed. An emitter (108) transmits an infrared signal to a wireless client (112). Emitter (108) is placed at a known location and has a known coverage area associated the...	10/09/2007
7215887	Method and apparatus for infrared data communication An apparatus and method for conveying contextually relevant information to a wireless client (112) is disclosed. More particularly, an emitter (108) transmits a diffuse infrared signal to a client (112) having an IrDA infrared communication inte...	05/08/2007
7173914	Communication node receipt of node-output information from processorless central equipment A first communication node of a plurality of communication nodes connected with processorless central equipment in a system sends one or more first portions of node-output information to the processorless central equipment. One or more additional communication nodes...	02/06/2007
7174192	Method for controlling a hands free system, radio apparatus, and hands free apparatus A radio apparatus, to be used as a first ending node of a communication network, is connectable to a hands-free apparatus by a local radio link to form a hands-free system. A call made on the hands-free apparatus for an second ending node in the communication networ...	02/06/2007
7126954	Virtual gateway A virtual gateway bridges voice and related signaling traffic between multiple endpoints behind the same or different Network Address Translation devices or firewalls or neither. The virtual gateway also serves as a mixer when used in a teleconferencing mode, which ...	10/24/2006
7068780	Hybrid echo canceller Systems and methods for reducing transmit echo in a transceiver are disclosed. A hybrid echo canceller includes a limited tap length FIR filter to cancel short-term echo, while an interpolated filter is used to cancel the long-tail echo. The limited tap length FIR f...	06/27/2006
6944137	Method and apparatus for a talkgroup call in a wireless communication system In a wireless code-division multiple access (CDMA) system (100), a talkgroup (101) of subscriber units is provided. A sub-talkgroup (102) of subscriber units, forming a part of the talkgroup is assigned at least one inbound channel (416-417	09/13/2005
6839734	Multimedia communications software with network streaming and multi-format conferencing Computers, particularly personal computers, have become everyday communications devices, nearly as common as telephones and televisions. A big reason for this is the expansion of computer networks, such as the Internet, which allow sending and receiving information,...	01/04/2005
6654455	IP conference telephone system compatible with IP-PBX systems An IP (Internet Protocol) conference telephone system feasible for an IP-PBX (Private Branch Exchange) includes a communication control connected to an IP network. When a connection for a conference is set up between a plurality of telephones accommodated...	11/25/2003
6546007	Time-slot interchanger that controls both time-slot access and signal-processing features A time-slot interchanger (TSI 100) is used to control both time-slot access and distribution of signals to physical or virtual signal-processing circuits (106-116). The TSI includes a control table (200) with an entry (202) for each time slot, that specif...	04/08/2003
6466550	Distributed conferencing system utilizing data networks A distributed packet-based audio conferencing system, method for packet-based audio conferencing, and a transceiver for use in such conferencing are disclosed. The system uses a collection of transceivers, with each conference participant connected to a l...	10/15/2002
5828657	Half-duplex echo canceler training using a pilot signal A far-end modem transmits a "pilot tone" during the time that a near-end modem is training its echo canceler. Correspondingly, the near-end modem is modified to notch, or filter, out this pilot tone from the received signal. The filtered received signal i...	10/27/1998
5825754	Filter and process for reducing noise in audio signals A noise reduction filter (28) is provided. The noise reduction filter (28) comprises a signal analysis block (30). The signal analysis block (30) is operable to receive an input audio signal and to determine a short term signal level. A noise floor block ...	10/20/1998
5825753	Echo canceler gain tracker for cellular modems A fast response gain tracker operates to adjust the magnitude of an echo cancellation signal. The latter signal is developed from an echo canceler. The fast response gain tracker provides an adjusted echo cancellation signal that is subtracted from an ech...	10/20/1998
5724416	Normalization of calling party sound levels on a conference bridge A conference call sound level balancing method and system for selectively muting a conferee whose sound environment is loud enough to dominate other conferees of a conference call. The method is operable on a system that includes a network-based conferenc...	03/03/1998
5390177	Conferencing arrangement for compressed information signals A conferencing bridging technique for compressed information signals which monitors the signal energy transmitted by each conferee. When there is only one conferee speaking, the summing circuit in the bridge unit is bypassed along with the speech decoding...	02/14/1995
5260938	Switching system comprising a conference arrangement A telephone switching system, or teleconferencing arrangement, in which each participant hears all the other speakers but does not hear his own voice. The speech intensity of each participant is measured and subtracted from a signal which is based on the ...	11/09/1993
5007049	Electronic exchange having a conference telephone communication function and conference telephone communication method An improved (N - 1) adding operation conference telephone communication method through an electronic exchange in which the telephone communication signals on speakers in a time sharing multiplexed telephone communication path are added, the telephone comm...	04/09/1991
4339818	Digital multiplexer with increased channel capacity A digital multiplexer accommodates a large number of voice channels per digital channel through use of an improved statistical coding technique. Analog information on the voice channels is encoded into multibit digital words by PCM encoders and the bit po...	07/13/1982
4253000	Method and system for reducing conference bridge oscillations Undesired oscillations in a communications conferencing network are reduced and/or eliminated by frequency shifting signals passing through the conferencing network by a small amount for each pass therethrough. Electrical information signals from a plurality o...	02/24/1981
4119807	Digital time division multiplex switching system A pulse code modulation (PCM) time division multiplex (TDM) telephone exchange to which n telephone lines are sequentially connected during n respective sequential time slots. An unlimited number of phones may be connected together for conference purposes...	10/10/1978
3997730	Time division conference circuit A conference circuit is disclosed for use in a time division switching system which has an incoming and an outgoing time division bus connected by a summing amplifier. During a conference call, a different group of conferee stations is connected to the in...	12/14/1976
3958084	Conferencing apparatus A method and apparatus for providing improved telephonic conferences is presented. A speaker is selected for each conferee from the signals of the other conferees. The peak values of the speaker signal establish a variable reference level which another co...	05/18/1976

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Class 370/269 - Including cancellation of certain signals