Patent application number | Description | Published |
20080205400 | LOW DEVIATION FIELD MODULATION FOR TRANSFER OF INFORMATION - An interface receives a packet stream associated with a source and a destination. The packet stream includes multiple packets, each packet including a header and a payload. A system generates a modulated stream for inclusion in the packet stream and performs a low deviation modification to a header field in each of the multiple packets to include the modulated stream in the packet stream. The system then transmits the packet stream including the modulated stream. | 08-28-2008 |
20090103712 | CONTROLLING ECHO IN A WIDEBAND VOICE CONFERENCE - In one embodiment, an echo canceller configured to cancel echo in a wideband voice conference is provided. A double-talk condition may be when a plurality of users are speaking substantially simultaneously. When a double-talk condition is detected in the wideband conference, a high-frequency process is enabled and used to process signals in the high band to reduce echo. Accordingly, echo in the high band may not be produced by end devices being used by the users' speaking. Also, the users speaking have the echo cancelled in the low band and substantial echo does not result. This results in the users speaking experiencing the conference in the narrowband. The other users that are not speaking, however, continue to receive wideband signals. The users not speaking also continue to have echo cancellation performed for the high band and low band because these users are not speaking and thus attenuation of their voices is not a consideration. | 04-23-2009 |
20090106362 | Wirelessly-enabled identification of digital media generated at an event - A method in one embodiment includes embedding a unique event tag into media files recorded at an event by a first media recording device, which is operable to wirelessly discover a second media recording device at the event. The first media recording device wirelessly communicates the unique event tag to the second media recording device for embedding into media files recorded at the event by the second media recording device. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. | 04-23-2009 |
20090202063 | Controlling Echo During Double-Talk in a Voice Conference - An echo canceller apparatus comprises a receive side attenuator coupled in a receive side signal path that is configured to couple from a conference call bridge to a caller; a convolution processor coupled to the receive side signal path at a convolution processor pick-off point; a double-talk detector coupled to the receive side signal path and to a sending side signal path that is configured to couple from the caller to the conference call bridge; and logic coupled to the receive side attenuator which when executed is responsive to a double-talk condition detected by the double-talk detector and operable to determine a level of echo canceled by the convolution processor, to determine an additional amount of attenuation to introduce, and to activate the receive side attenuator to introduce the additional attenuation. | 08-13-2009 |
20100074455 | USE OF NON-AUDIBLE BAND TO RELAY INFORMATION FOR ECHO CANCELLATION IN A DISTRIBUTED MEDIA SYSTEM - Particular embodiments provide for attenuating one or more microphone signals in a teleconferencing system upon detecting a non-audible signal. A far end voice signal is received from a sound source. A non-audible signal is added to the far end voice signal to create a composite signal, which is provided to one or more speakers. The speakers output the composite signal and the non-audible signal are detected in the composite signal after the composite signal is received at one or more microphones. The non-audible signal allows an attenuator to attenuate a microphone signal including the composite signal from a particular microphone in response to the detected non-audible signal to reduce far end echo. | 03-25-2010 |
20100180174 | DIGITAL SIGNATURE OF CHANGING SIGNALS USING FEATURE EXTRACTION - In one embodiment, a signal transmission authentication apparatus includes an input operable to receive a changing signal, a first extractor operable to extract first phoneme data from the received changing signal, a first generator including logic operable to generate first data representative of the extracted first phoneme data, a first output operable to communicate output data corresponding to the received changing signal and the first data from an associated transmitter to an associated receiver, a second extractor associated with the receiver including logic operable to extract second phoneme data from the received output data via the receiver and regenerate the first phoneme data from the received first data, a comparator including logic operable to generate a comparison signal in accordance with a comparison of the first and second phoneme data, and a second output operable to generate a signal corresponding to authenticity of the received changing signal in accordance with an output of the comparator. | 07-15-2010 |
20110205915 | ECHO MITIGATION IN THE PRESENCE OF VARIABLE DELAYS DUE TO ADAPTIVE JITTER BUFFERS - In an example embodiment, a control connection is introduced between an adaptive jitter buffer (AJB) and an adaptive bulk delay (ABD) buffer of an echo canceller (ECAN) in an Internet Protocol (IP) conference bridge. The control connection allows the AJB to control the amount of delay inserted by the ABD in the ECAN convolution processor (CP) signal path. The adjustment in ABD delay restores the time alignment of the ECAN internal echo estimate and offsets variations in echo tail delay introduced by network induced AJB delay changes. Time-invariance is preserved in the echo tail path. | 08-25-2011 |
20110216785 | BUFFER EXPANSION AND CONTRACTION OVER SUCCESSIVE INTERVALS FOR NETWORK DEVICES - In one method embodiment, receiving from the network device a multiplex of a compressed video stream and a compressed audio stream, the multiplex comprising a succession of intervals corresponding to a video program corresponding to a first playout rate; and at the start of each interval, replacing the compressed audio stream with a compressed, pitch-preserving audio stream corresponding to a second playout rate different than the first. | 09-08-2011 |
20110217025 | AUXILIARY AUDIO TRANSMISSION FOR PRESERVING SYNCHRONIZED PLAYOUT WITH PACED-DOWN VIDEO - In one method embodiment, providing a multiplex of compressed versions of a first video stream and a first audio stream, each corresponding to an audiovisual (A/V) program, the first video stream and the first audio stream each corresponding to a first playout rate and un-synchronized with each other for an initial playout portion; and providing a compressed version of a second audio stream, the second audio stream corresponding to a pitch-preserving, second playout rate different than the first playout rate, the second audio stream synchronized to the initial playout portion of the first video stream when the first video stream is played out at the second playout rate, the first audio stream replaceable by the second audio stream for the initial playout portion. | 09-08-2011 |
20110276325 | Training A Transcription System - According to certain embodiments, training a transcription system includes accessing recorded voice data of a user from one or more sources. The recorded voice data comprises voice samples. A transcript of the recorded voice data is accessed. The transcript comprises text representing one or more words of each voice sample. The transcript and the recorded voice data are provided to a transcription system to generate a voice profile for the user. The voice profile comprises information used to convert a voice sample to corresponding text. | 11-10-2011 |
20110301949 | SPEAKER-CLUSTER DEPENDENT SPEAKER RECOGNITION (SPEAKER-TYPE AUTOMATED SPEECH RECOGNITION) - In an example embodiment, there is disclosed herein an automatic speech recognition (ASR) system that employs speaker clustering (or speaker type) for transcribing audio. A large corpus of audio with corresponding transcripts is analyzed to determine a plurality of speaker types (e.g., dialects). The ASR system is trained for each speaker type. Upon encountering a new user, the ASR system attempts to map the user to a speaker type. After the new user is mapped to a speaker type, the ASR employs the speaker type for transcribing audio from the new user. | 12-08-2011 |
20110310764 | System and Method for Facilitating Network Performance Analysis - A system for facilitating network performance analysis. In an illustrative embodiment, the system includes a first module capable of quantifying network performance associated with a first portion of the network and providing a signal in response thereto. A second module is capable of ascertaining performance degradations in a communications link traversing plural portions of the network that are attributable to the first portion based on the signal. In a more specific embodiment, the second module further includes a third module adapted to ascertain degradations in network performance associated with a second portion of the network based on the signal and based on a performance parameter associated with both the first portion and the second portion of the network. In this embodiment, the first portion includes a wireless portion, and the second portion includes a wired portion. The performance parameter incorporates a Frame Loss Vector (FLV) associated with a communications link that traverses the wireless and wired portions of the network. | 12-22-2011 |
20120110152 | REAL TIME PROTOCOL PACKET TUNNELING - In one embodiment a method and apparatus are provided that automatically establish an real time protocol (RTP) tunnel between an originator node or router and a terminator node or router, wherein the terminator node is close to a remote RTP peer. A method includes detecting a new flow of RTP packets wherein the RTP packets are encoded with a destination Internet Protocol (IP) address. Responsive to detecting the new flow, a probe is sent towards a same IP address as the destination IP address of the RTP packets. A response to the probe is received, the response including an identifier of a node that generated the response. Then, using the identifier, a tunnel is established with the node that generated the response, and thereafter compressed packets (compressed headers, compressed payloads, or both) are passed via the tunnel. | 05-03-2012 |
20130039497 | SYSTEM AND METHOD FOR USING ENDPOINTS TO PROVIDE SOUND MONITORING - A method is provided in one example embodiment that includes monitoring a sound pressure level with an endpoint (e.g., an Internet Protocol (IP) phone), which is configured for communications involving end users; analyzing the sound pressure level to detect a sound anomaly; and communicating the sound anomaly to a sound classification module. The endpoint can be configured to operate in a low-power mode during the monitoring of the sound pressure level. In certain instances, the sound classification module is hosted by the endpoint. In other implementations, the sound classification module is hosted in a cloud network. | 02-14-2013 |
20130135523 | Managing The Bandwidth Of A Communication Session - A system includes a processor operable to identify each of a plurality of first video packets from a communication session with a first identifier designating that bandwidth is reserved on the network for the packet, and identify each of a plurality of second video packets from the communication session with a second identifier designating that bandwidth is not reserved on the network for the packet. The system further includes an interface operable to initiate transmission of the plurality of first video packets and the plurality of second video packets in the communication session. | 05-30-2013 |
20130258909 | ECHO MITIGATION IN THE PRESENCE OF VARIABLE DELAYS DUE TO ADAPTIVE JITTER BUFFERS - In an example embodiment, a control connection is introduced between an adaptive jitter buffer (AJB) and an adaptive bulk delay (ABD) buffer of an echo canceller (ECAN) in an Internet Protocol (IP) conference bridge. The control connection allows the AJB to control the amount of delay inserted by the ABD in the ECAN convolution processor (CP) signal path. The adjustment in ABD delay restores the time alignment of the ECAN internal echo estimate and offsets variations in echo tail delay introduced by network induced AJB delay changes. Time-invariance is preserved in the echo tail path. | 10-03-2013 |
20140022956 | System and Method for Improving Audio Quality During Web Conferences Over Low-Speed Network Connections - A method that includes: (1) transmitting, at a first transmit time point, a first probe packet over a network connection to a conferencing server immediately before transmitting a data packet, the first probe packet arriving at the conferencing server at a first receive time point; (2) transmitting, at a second transmit time point, a second probe packet over the network connection to the conferencing server immediately after transmitting the data packet, the second probe packet arriving at the conferencing server at a second receive time point, the first and second probe packets being smaller than the data packet; (3) receiving information encoding a first difference between the first and second transmit time points and a second difference between the first and second receive time points; and (4) based on the first and second differences, modifying a transmission parameter associated with data packets to be transmitted thereafter to the conferencing server. | 01-23-2014 |
20140126653 | PRESERVING SYNCHRONIZED PLAYOUT OF AUXILIARY AUDIO TRANSMISSION - In one method embodiment, providing a multiplex of compressed versions of a first video stream and a first audio stream, each corresponding to an audiovisual (A/V) program, the first video stream and the first audio stream each corresponding to a first playout rate and un-synchronized with each other for an initial playout portion; and providing a compressed version of a second audio stream, the second audio stream corresponding to a pitch-preserving, second playout rate different than the first playout rate, the second audio stream synchronized to the initial playout portion of the first video stream when the first video stream is played out at the second playout rate, the first audio stream replaceable by the second audio stream for the initial playout portion. | 05-08-2014 |
20140376399 | Managing the Bandwidth of a Communication Session - A system includes a processor operable to identify each of a plurality of first video packets from a communication session with a first identifier designating that bandwidth is reserved on the network for the packet, and identify each of a plurality of second video packets from the communication session with a second identifier designating that bandwidth is not reserved on the network for the packet. The system further includes an interface operable to initiate transmission of the plurality of first video packets and the plurality of second video packets in the communication session. | 12-25-2014 |
20150029852 | MAXIMIZING BOTTLENECK LINK UTILIZATION UNDER CONSTRAINT OF MINIMIZING QUEUING DELAY FOR TARGETED DELAY-SENSITIVE TRAFFIC - In one embodiment, a system and method include determining bandwidth of a link that connects a local modem to a remote router. A first percentage of the bandwidth is assigned to a first class of data and a second percentage of bandwidth is assigned to a second class of data. The remaining percentage of the bandwidth is assigned for nominal excess capacity. The flow of first class of data and second class of data are controlled to below respective percentages of the bandwidth. | 01-29-2015 |
20150078549 | CONTROLLING ECHO IN A WIDEBAND VOICE CONFERENCE - In one embodiment, an echo canceller configured to cancel echo in a wideband voice conference is provided. A double-talk condition may be when a plurality of users are speaking substantially simultaneously. When a double-talk condition is detected in the wideband conference, a high-frequency process is enabled and used to process signals in the high band to reduce echo. Accordingly, echo in the high band may not be produced by end devices being used by the users' speaking. Also, the users speaking have the echo cancelled in the low band and substantial echo does not result. This results in the users speaking experiencing the conference in the narrowband. The other users that are not speaking, however, continue to receive wideband signals. The users not speaking also continue to have echo cancellation performed for the high band and low band because these users are not speaking and thus attenuation of their voices is not a consideration. | 03-19-2015 |