Magor Communications Corporation

Pleora Technologies Inc.

Mojtaba Hosseini

Patrick White

Eric Boisvert

Xiaodong Huang

Described are various embodiments of systems, methods and devices for transmitting, over a digital network, a digital image data object defined by a plurality of image pixels, wherein embodiments comprise: a digital image compressor operable to compress the digital image data object by independently compressing distinct pixel groups defined amongst the plurality of image pixels into independently compressed pixel groups to be transmitted over the digital network, in which, for each of said compressed pixel groups, a comparison value indicative of a similarity between given pixel data of a given group pixel and reference pixel data of a corresponding reference pixel is computed to at least partially replace said given pixel data; and a digital image decompressor coupled thereto operable to receive each of said independently compressed pixel groups for independent decompression.

Methods and systems for balancing compression ratio with processing latency

Video data that is associated with a videoconference or a telepresence session is captured and a video signal relating thereto is provided. The video signal is divided into segments, which are identical from one video frame to another subsequent video frame within the video signal. Each segment is encoded independently, to result in encoded segment data such that both I-frames and P-frames are generated for a given segment, so as to support independent reconstruction of segments at a distant end. The encoded segment data is transmitted subsequently to the distant end.

Low latency high resolution video encoding

Visual information over a network by filtering a full resolution image signal to produce a series of sub-bands, wherein at least one of the sub-bands constitutes a base sub-band representing an image of reduced resolution and wherein additional sub-bands carry higher resolution information. At least the base sub-band is transmitted to a far end endpoint to permit image reconstruction at the far end endpoint at a degree of resolution dependent on the number of sub-bands used to reconstruct the image.

Method and apparatus for communicating an image over a network with spatial scalability

A method is disclosed for managing multiple data streams transported over a common communications resource in a packet network, wherein data flowing through the resource travels in both directions, and wherein each stream is subject to data peaks. The round trip delay is determined for each data stream, and the transmission of data peaks in one or more of the data streams is delayed to at least reduce the degree of coincidence in the data peaks of different streams without increasing the maximum round trip delay for the data streams.

Method of managing the flow of time-sensitive data over packet networks

Exchanging of videoconference data between a first endpoint and a second endpoint via a network includes receiving, at the first endpoint, statistical data relating to transmission of first videoconference data. In particular, the first videoconference data is data that is transmitted previously from the first endpoint to the second endpoint via the network, and the statistical data relates to network performance characteristics during transmission of the first videoconference data. An approximately optimized data transmission rate for the network performance characteristics is determined, based on the statistical data. The output bit rate of a video encoder associated with the first endpoint is adjusted, such that second videoconference data, relating to the same videoconference at a time that is later than the first videoconference data, is encoded to provide output data at an adjusted output bit rate for being transmitted via the network at approximately the optimized data transmission rate.

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Ottawa, Canada

Mojtaba Hosseini