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7619994 Adapter for use with a tandem-free conference bridge  
A conference bridge adapter for processing data carried on a media path between, on the one hand, a conference bridge operative to communicate composite packets carrying media information and...
7599357 Method and apparatus for detecting and correcting electrical interference in a conference call  
The present invention enables a network to detect electrical interference caused by cellular phones and correct the problem by playing a network announcement to the network operator if the...
7573868 Audio/video synchronization using audio hashing  
Audio and video frames are synchronized by hashing an audio frame at a sender and combining the resultant hash value with the video frame. The audio frame is transmitted over an audio network, such...
7492731 Method for dynamically optimizing bandwidth allocation in variable bitrate (multi-rate) conferences  
Method for dynamically optimizing bandwidth allocation in a variable bitrate conference environment. Conference means with two or more outputs are provided, where each one can output data at...
7483400 Managing a packet switched conference call  
The invention relates to a method for managing a packet switched, centralized conference call between a plurality of terminals 13 . In order to enable an enhancement of the user comfort, it is...
7460656 Distributed processing in conference call systems  
Conference calls are handled using distributed processing. In one embodiment, the invention includes receiving sets of telephone audio signals from conference subnodes, the telephone audio signals...
7460495 Serverless peer-to-peer multi-party real-time audio communication system and method  
A serverless peer-to-peer (P2P) multi-party real-time audio communication system and method in which each of the peers takes a turn mixing and compressing the audio and redelivering the compressed...
7428223 Method for background noise reduction and performance improvement in voice conferencing over packetized networks  
The present invention is directed to a system and method for background noise reduction and performance improvement in conferencing. A method for providing a conferencing session may include...
7420935 Teleconferencing arrangement  
A method and an apparatus for controlling a conference call is a system which comprises a conference bridge for combining several audio signals arriving from terminals and for transmitting the...
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...
7385940 System and method for using a plurality of processors to support a media conference  
A system for using a plurality of processors to support a media conference includes a mixing processor and a first media transformation processor coupled to the mixing processor. The mixing...
7342875 Space-time coded OFDM system for MMDS applications  
A communications system includes a base station that is configured to transmit a signal that is modulated according to a predetermined modulation scheme and an orthogonal frequency division...
7184791 Methods, receivers, and computer program products for determining transmission power control commands using biased interpretation  
Methods, receivers, and computer program products for defining asymmetric decision regions of a symbol space to interpret transmitted power control commands are disclosed. A method of determining...
7085364 Advanced conference drop  
A network telephone system is provided with a distributed network, a network call processor, with the call processor connected to the network. A telephone line network interface is connected to a...
7046780 Efficient buffer allocation for current and predicted active speakers in voice conferencing systems  
A method and computer program product allows for the efficient allocation of buffers (e.g., first-in first-out (FIFO) queues) for current and predicted active speakers in voice conferencing...
7020110 Resource allocation for MIMO-OFDM communication systems  
Techniques to schedule terminals for data transmission on the downlink and/or uplink in a MIMO-OFDM system based on the spatial and/or frequency “signatures” of the terminals. A scheduler forms...
6662211 Method and system for providing conferencing services in a telecommunications system  
A method and apparatus for providing unified conferencing services in a telecommunications system is described. A DSP chip in the system contains an internal CPU and on-chip memory storage device....
6262979 Telecommunication conferencing system and method  
A telecommunication conferencing system and method are described. Three or more telephone sets connected to one of the networks can concurrently participate in a conference call. Each telephone set...
6230130 Scalable mixing for speech streaming  
A speech processing system receives multiple streams of speech frames. The system selects among concurrent ones of the frames a subset of those frames that are the most relevant, based on...
6128334 Receiver addressable AM compatible digital broadcast system  
The present invention provides for a receiver addressable AM compatible digital broadcast system and method. The digital broadcast signal includes a plurality of digitally modulated signals and an...
5884167 Method for completing a conference with a personal communications units  
An improvement in the transparency of personal telecommunications over the prior art is achieved by automatically placing a return call from a personal communications unit of a called individual in...
5802294 Teleconferencing system in which location video mosaic generator sends combined local participants images to second location video mosaic generator for displaying combined images  
A multimedia collaboration system that integrates separate real-time and asynchronous networks--the former for real-time audio and video, and the latter for control signals and textual, graphical...
5784447 Method and circuit arrangement for allowing telephone conversations among several users  
A method and circuit arrangement for allowing and improving the telephone conversation among several users in digital switched telephone PCM systems, using a multiplication coefficient inversely...
5774567 Audio codec with digital level adjustment and flexible channel assignment  
An audio codec capable of handling complex control and routing of numerous sound inputs is described. The complex control and routing is obtained by weighting various sound inputs in accordance...
5754631 Voice response unit having robot conference capability on ports  
A Voice Response Unit (VRU) 10 provides ports 12 to which communications devices 13 may be coupled. Two-way conversations between ports 12 are enabled by inter-port connections made by system bus...
5703794 Method and system for mixing audio streams in a computing system  
The disclosed invention constitutes a method and system, including an audio mixer, for selecting audio streams from one or more applications running on a computer system. An application can...
5592473 Private branch exchange system and methods for operating same  
A digital private branch exchange system and methods of operating same are provided. A system is capable of providing improved and integrated conferece calling, voice mail, music on hold, and call...
5539741 Audio conferenceing system  
A computer workstation receives multiple audio input streams over a network in an audio conference. The audio input streams are kept separate by storing them in different queues. Digital samples...
5434856 Method for monitoring communication talkgroups  
A voice packet, containing coded voice information for a communication talkgroup that is currently being monitored, is received and stored in a buffer (200-202) dedicated to the communication...
5357511 Distributed processing in a digital audio mixing network  
A large mixing network is implemented by distributing the processing of digital audio data to multiple digital processing modules where each module has multiple digital signal processors. The data...
5276678 Distributed switching and telephone conferencing system  
A communication system having full call processing capabilities in the user ports, each port being connected to a TDM collection bus and a TDM distribution bus. A bus controller terminates the...
5260941 Digital radio telephone system  
The telephone system of the present invention is realized by a unique dynamic time slice architecture which allows for up to 480 transfers of data. A dual port RAM is utilized in which are stored...
5233605 Method for assuring fidelity of a summing process  
In a digital summing process that sums non-linear digital signals by converting them to linear signals, computing their two's complement, summing the two's complements together and converting the...
5229989 Method and apparatus for processing digital signals  
The present invention discloses a communication system network that comprises a plurality of communication systems and a processing multiplexer. The communication systems, which may be either...
5199029 Circuit arrangement for establishing conference connections  
A circuit arrangement for establishing conference connections comprising conference units is described, which units are linked to form a loop (L). In this loop (L) sum codewords consisting of...
5127001 Conference call arrangement for distributed network  
An arrangement for conducting a conference call over a distributed digital network in which, at each station connected to the conference call, only voice packets from the other stations connected...
5029162 Automatic gain control using root-mean-square circuitry in a digital domain conference bridge for a telephone network  
An automatic gain control for an inputted multiplex PCM data stream in a conferencing bridge in a telephone system. The inputted multiplexed data stream has a predetermined number of time slots...
4901308 Digital bridge for a time slot interchange digital switched matrix  
A time slot interchange matrix is comprised of a plurality of matrix modules (50-56) each for receiving data on a plurality of channels and transmitting data on the same number of channels. Each of...
4831618 Additive PCM speaker circuit for a time shared ISDN conference arrangement  
A time shared multiport conference arrangement includes an additive PCM speaker circuit. The additive PCM speaker circuit eliminates the need for loudest speaker detection and the last speaker...
4757494 Method for generating additive combinations of PCM voice samples  
A method for generating additive combinations of PCM voice samples separates the samples into magnitude portions and sign portions. The magnitude portion of each PCM voice sample is converted from...
4719618 Digital conference circuit  
A digital conference circuit for multiplexed voice signals. Each slot for each of the users is further sub-divided into sub-slots for all the users. A selection circuit indicates which originating...
4658398 Framed digital voice summing for teleconferencing  
In a teleconferencing system activity levels of digital voice signals are compared over activity selection times and the signals are multiplied, over frame delays, by predetermined constants...
4656625 Switching system having capability for telecommunication conferences  
A switching system having a capability for telecommunication conferences, including therein, at least, a speech path memory, a mixing circuit, and a feedback circuit. The speech path memory is...
4648089 Digital voice summing for teleconferencing  
Digitally encoded voice signals are weighted dynamically in multipliers prior to summation of the digital signals. Greater weight is given to the more active channels. In one system, the signals...
4646288 Multi-line accumulator/multiplexer  
A multi-line accumulator/multiplexer for employment in a voice switching control system in order to provide that system with a plurality of full-duplex non-blocking lines with general purpose...
4607362 Method of and circuit arrangement for establishing conference connections in a switching system  
During algebraic summing of code words from conference participants to form a partial sum-code word overflow of the values may occur. Such an overflow can be prevented when prior to the adding...
4606021 Digital conference circuit  
The disclosed digital conference circuit additively combines conference signals with a single adder, a partial sum accumulator RAM, and conversion ROMs. Internal conferencing time slots are...
4603417 PCM coder and decoder  
In order to realize a system in which three or more subscriber parties can hold a conference, and a PCM decoder is also provided with a circuit which adds part of a received digital PCM signal on...
4588986 Method and apparatus for operating on companded PCM voice data  
A method and apparatus for digitizing audio signals being generated from a plurality of parties (A, B) in order to provide audio communication between the parties with a minimum of interference....
4547878 Non-linear adder  
This disclosure depicts a non-linear adder circuit for teleconferencing. A pre-determined number of most significant bits (MSB) is utilized from a first PCM signal to select one of a plurality of...
Matches 1 - 50 out of 69 1 2 >