Patent application number | Description | Published |
20090160929 | System and Method for Video Conferencing - In one embodiment, an apparatus includes two modules. A first module receives a request from a first endpoint to subscribe to a voice activated multicast group and causes the first endpoint to receive a current speaker's video stream if the first endpoint is not the current speaker and to receive a last speaker's video stream if the first endpoint is the current speaker. A second module receives a request from a second endpoint to subscribe to a continuous presence multicast group and causes the second endpoint to receive a continuous presence, current speaker video stream if the second endpoint is not the current speaker and to receive a continuous presence, last speaker video stream if the second endpoint is the current speaker. The continuous presence, current speaker video stream includes a composition or two or more video streams, one of which includes at least a portion of the current speaker's video stream. The continuous presence, last speaker video stream includes a composition or two or more video streams, one of which includes at least a portion of a last speaker's video stream. | 06-25-2009 |
20110205333 | METHOD AND APPARATUS FOR USING FAR END CAMERA CONTROL (FECC) MESSAGES TO IMPLEMENT PARTICIPANT AND LAYOUT SELECTION IN A MULTIPOINT VIDEOCONFERENCE - A method, an apparatus and a medium encoded with instructions for providing layout selection, participant selection, and/or participant-to-participant far end camera control of the selected participant for use in a continuous presence multipoint videoconference. The method includes receiving one or more far end camera control messages over a packet network from a first participant of a multipoint videoconference; maintaining an indication of a far end camera control mode for the first participant, the mode being one of a set of modes; and depending on the far end camera control mode and on controls possible, carrying out a control according to one ore more the camera control messages. | 08-25-2011 |
20120127262 | Automatic Layout and Speaker Selection in a Continuous Presence Video Conference - Techniques are provided for managing display layouts for a continuous presence video conference. Each display layout has a fixed number of positions, and one of the display layouts has a maximum number of positions for display to participants in the video conference. The display layouts comprise video display positions for participants in a video conference. When the number of participants is greater than a threshold, one of the positions in that layout is used as a shared position assigned to a video stream of participants not assigned to fixed positions in that layout. The shared position is used in a scanning manner such that video streams of participants not assigned to fixed positions in the layouts are classified as scanning streams and are displayed in the non-fixed (shared) position over a predetermined time interval. | 05-24-2012 |
20120218887 | Shaping Multimedia Stream Bit-Rates to Adapt to Network Conditions - An apparatus and methods are provided for shaping a transmit bit-rate of a multimedia stream to adapt to the bandwidth of network path on which the multimedia stream is sent between a source and destination. A condition indicative of a bandwidth of the network path is monitored, and at an intermediate point on the network path between the source and destination, the transmit bit-rate of the multimedia stream is adjusted to adapt to the condition indicative of the bandwidth of the path. | 08-30-2012 |
20120262538 | System And Method For Video Conferencing - In one embodiment, an apparatus includes a first module that causes the first endpoint to receive a current speaker's video stream if the first endpoint is not the current speaker and to receive a last speaker's video stream if the first endpoint is the current speaker. The apparatus includes a second module that causes the second endpoint to receive a continuous presence, current speaker video stream if the second endpoint is not the current speaker and to receive a continuous presence, last speaker video stream if the second endpoint is the current speaker. The continuous presence, current speaker video stream comprises two or more video streams, one of which includes at least a portion of the current speaker's video stream. The continuous presence, last speaker video stream comprises two or more video streams, one of which includes at least a portion of a last speaker's video stream. | 10-18-2012 |
20130106984 | TECHNIQUES FOR PERFORMING KEY FRAME REQUESTS IN MEDIA SERVERS AND ENDPOINT DEVICES | 05-02-2013 |
20130135427 | Techniques For a Rate-Adaptive Video Conference Bridge - A rate adaptive video conference bridge and related techniques are provided. At a video conference bridge, a source video stream is received from a source endpoint device in a network. The source video stream is encoded using a first encoder unit and second encoder unit to generate respective first and second encoded video streams. A determination is made whether to decrease or increase a bit rate of the source video stream based on network condition information. If the bit rate is to be decreased, the first encoder unit is instructed to send the first encoded video stream to a destination endpoint device. If the bit rate is to be increased, the second encoder unit is instructed to send the second encoded video stream to the destination endpoint device. | 05-30-2013 |
20130159495 | Controlling Bit-Rates for Media Streaming Sessions - In one embodiment, a method includes (a) discerning whether an average packet delay in a media streaming session is increasing or decreasing over a first defined time window, (b) discerning whether an average jitter in the media streaming session is increasing or decreasing over a second defined time window, (c) in response to (a) and (b), calculating a specific bit-rate quantity corresponding to a change in bit-rate, and (d) controlling a bit-rate of the media streaming session in accordance with the specific bit-rate quantity. | 06-20-2013 |
20130205002 | WIDE AREA NETWORK OPTIMIZATION - In one embodiment, a method includes receiving application traffic at a network device from one or more endpoints, measuring performance of applications at the network device, optimizing TCP (Transmission Control Protocol) applications and UDP (User Datagram Protocol) applications based on the measured performance and policy input received at the network device, queuing the application traffic at the network device such that the application traffic shares available bandwidth in accordance with the measured performance and the policy input, and transmitting the application traffic over a wide area network. An apparatus is also disclosed. | 08-08-2013 |
20130226567 | System for Conealing Missing Audio Waveforms - In one embodiment, a method can include: (i) establishing an internet protocol (IP) connection; (ii) forming a buffered version of a plurality of voice frame slices from received audio packets; and (iii) when an erasure is detected, performing a packet loss concealment (PLC) to provide a synthesized speech signal for the erasure, where the PLC can include: (a) identifying first and second pitches from the buffered version of the plurality of voice frame slices; and (b) forming the synthesized speech signal by using the first and second pitches, and more if needed, followed by an overlay-add (OLA). | 08-29-2013 |
20140085405 | System and Method for Video Conferencing - In one embodiment, an apparatus includes two modules. A first module receives a request from a first endpoint to subscribe to a voice activated multicast group and causes the first endpoint to receive a current speaker's video stream if the first endpoint is not the current speaker and to receive a last speaker's video stream if the first endpoint is the current speaker. A second module receives a request from a second endpoint to subscribe to a continuous presence multicast group and causes the second endpoint to receive a continuous presence, current speaker video stream if the second endpoint is not the current speaker and to receive a continuous presence, last speaker video stream if the second endpoint is the current speaker. The continuous presence, current speaker video stream includes a composition or two or more video streams, one of which includes at least a portion of the current speaker's video stream. The continuous presence, last speaker video stream includes a composition or two or more video streams, one of which includes at least a portion of a last speaker's video stream. | 03-27-2014 |
20140119183 | CONTROL OF RATE ADAPTIVE ENDPOINTS - An apparatus may receive a plurality of data streams for transmission over a network. The apparatus may adjust packet drop rates in proportion to differences between actual bit rates and target bit rates of the data streams. Information about the adjusted packet drop rates may be provided to rate adaptive endpoints that are generating the data streams. The rate adaptive endpoints may respond to the information by adjusting the bit rates at which the data streams are encoded. Over one or more time intervals, the bit rates are adjusted to levels that yield a transmission of the data streams that is both balanced and unbiased. | 05-01-2014 |
20150023169 | System and Architecture to Optimize Video Traffic over Internet Protocol Networks - Techniques are provided for managing network traffic and alleviating network congestion issues in video conference environments. At a video conference bridge device configured to send and receive communications to an endpoint device in a network, one or more video streams are received from the endpoint participating in a video conference. Each of the video streams is classified as a rate adaptive stream or as a non-rate adaptive stream. For video streams classified as rate adaptive streams, the video streams are assigned to a buffer queue for rate adaptive streams. For video streams classified as non-rate adaptive streams, the video streams are assigned to a buffer queue for non-rate adaptive streams. | 01-22-2015 |