Patent application number | Description | Published |
20090110106 | SYSTEM AND APPARATUS FOR ERROR CONTROL CODES BASED ON LAYERING AND LINEAR TRANSFORMATIONS - A powerful new class of methods for encoding digital data for reliable transmission over unreliable communication channels is described. With this method, the message bits are divided into multiple submessages and the bits in each layer are encoded using a standard error correction code to provide a plurality of subcodewords. A first linear transformation is applied to each of the subcodewords. The so-transformed subcodewords from the different submessages are then combined to form a first redundancy block to be transmitted. Additional redundancy blocks are generated by repeating this process on the same message but with jointly related nonidentical sets of linear transformations. The result is a set of codewords for each message which are then used to generate a transmitted waveform in one of several different ways, depending upon the application. For example, the codewords can be used in sequence (temporally) to form a rateless code for transmission over channels of unknown quality, in which case a receiver accumulates as many of the codewords as are necessary to successfully decode. As another example, the codewords can be spatially distributed if the channel has multiple-inputs, as would be the case in a multi-antenna system. As still another example, the codewords can be distributed over subchannels in a frequency-division multiplexing system. | 04-30-2009 |
20110211811 | SELECTING A VIDEO IMAGE - Enabling a selection of a video image is described. A selection of a representative image is received [ | 09-01-2011 |
20110221965 | DEGRADING A VIDEO - Monitoring [ | 09-15-2011 |
20110289224 | METHODS AND SYSTEMS FOR ESTABLISHING COLLABORATIVE COMMUNICATIONS BETWEEN DEVICES USING AMBIENT AUDIO - Various embodiments of the present invention are directed to systems and methods for enabling two or more devices in the same ambient audio environment to become automatically interconnected so that information can be exchanged between the devices. The two or more device detect substantially the same sounds, such as people talking in a meeting, automatically determine this fact and enter the devices into an information and document sharing relationship via a network. | 11-24-2011 |
20120026274 | System, Method and Apparatus For Controlling Image Access In A Video Collaboration System - The present invention provides a computer implemented method, comprising the steps of: determining using data from a sensing device, when a moveable obscuring structure is in a closed position. When the obscuring structure is in the closed position, the transmission of accessible images captured by an image capture device at the location of a local user is to remote user locations in a video conference session is prevented. | 02-02-2012 |
20120062690 | DETERMINING A SYNCHRONIZATION RELATIONSHIP - A synchronization relationship determiner comprising an input visual information signal receiver configured to receive an input visual information signal, and a capture signal receiver configured to receive a capture signal generated by a capture device. The synchronization relationship determiner is configured to determine a synchronization relationship between the input visual information signal and the capture signal. The synchronization relationship determination is signal based. | 03-15-2012 |
20120062799 | ESTIMATING VIDEO CROSS-TALK - A video cross-talk estimator comprising a visual input signal receiver configured to receive a visual input signal, a capture signal receiver configured to receive a capture signal, and a signal based video-cross talk determiner configured to estimate video cross-talk based on at least two frames of the visual input signal. The estimation of the video cross-talk is signal based. | 03-15-2012 |
20120106623 | ADAPTING A VIDEO STREAM - Adapting characteristics of a video stream. A source video stream is received comprising instructions to employ at least one reference frame at a video adaptation device, wherein the source video stream is encoded. The source video stream is adapted, at the video adaptation device, such that the instructions are adapted to store a different number of reference frames. A video stream is produced with the different number of the reference frames. | 05-03-2012 |
20120106625 | ADAPTING VIDEO STREAM FOR ERROR RESILIENCE - Adapting characteristics of a video stream. A video stream is received, at a video adaptation device, which employs a first reference frame. A determination is made, at a video adaptation device, to splice the video stream to employ a second reference frame in place of the first reference frame. The video stream is spliced, at a video adaptation device, to create a spliced video stream that employs the second reference frame. | 05-03-2012 |
20130039410 | METHODS AND SYSTEMS FOR ADAPTING ERROR CORRECTING CODES - Methods for adapting the sliding window of sliding window-based error correcting codes based on the coding structure of a compressed media stream are disclosed. In one aspect, a sender packetizes each frame of a media stream to be sent to a receiver into a set of frame packets. The sender also determines compression dependence of each frame and adapts a sliding window of a sliding window-based error correcting code based on the compression dependence of the frame. The sender encodes the frame packets into at least one associated parity packet according to the error correcting code with the adapted sliding window, and sends the frame packets and the at least one associated parity packet to the receiver. | 02-14-2013 |