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21. 发明专利

CA2728093A1 VIDEO SELECTOR 未知
公开(公告)号：CA2728093A1
公开(公告)日：2009-12-30
申请号：CA2728093
申请日：2009-06-11
申请人： GLOBAL IP SOLUTIONS GIPS AB , GLOBAL IP SOLUTIONS INC
发明人： ELLNER HENRIK
IPC分类号： H04N7/15
摘要： The invention provides a method for selecting input video signals in a video conference for transmission. The method bases its selection decision on the momentary voice activity of the participants, but does so while observing constraints aimed at: improving stability of the image seen by each participant; decreasing flickering of the image; choosing comfortable and helpful swapping times between different image configurations; and reflecting the importance which is attributed to persons having a higher past average activity in a natural conference. In one embodiment of the invention, the set of constraints includes an override, by which one or more participants can be selected irrespectively of the selection decision. In accordance with a second aspect of the invention, there is provided video selector hardware comprising units to perform the steps of the method.

22. 发明专利

DE602007009958D1 Verfahren und Empfänger zur Bestimmung eines Jitterspeicherniveaus 未知
公开(公告)号：DE602007009958D1
公开(公告)日：2010-12-02
申请号：DE602007009958
申请日：2007-06-28
申请人： GLOBAL IP SOLUTIONS INC , GLOBAL IP SOLUTIONS GIPS AB
发明人： FAHLBERG LUNDIN HENRIK
IPC分类号： H04J3/06 , H04L12/64

23. 发明专利

CA2728093C VIDEO SELECTOR 未知
公开(公告)号：CA2728093C
公开(公告)日：2013-11-12
申请号：CA2728093
申请日：2009-06-11
申请人： GLOBAL IP SOLUTIONS GIPS AB , GLOBAL IP SOLUTIONS INC
发明人： ELLNER HENRIK
IPC分类号： H04N7/15
摘要： The invention provides a method for selecting input video signals in a video conference for transmission. The method bases its selection decision on the momentary voice ac-tivity of the participants, but does so while observing con-straints aimed at: .cndot. improving stability of the image seen by each participant; .cndot. decreasing flickering of the image; .cndot. choos-ing comfortable and helpful swapping times between different image configurations; and .cndot. reflecting the importance which is attributed to persons having a higher past average activity in a natural conference. In one embodiment of the invention, the set of constraints includes an override, by which one or more par-ticipants can be selected irrespectively of the selection decision. In accordance with a second aspect of the invention, there is provided video selector hardware comprising units to perform the steps of the method.

28. 发明专利

AT418818T 未知
公开(公告)号：AT418818T
公开(公告)日：2009-01-15
申请号：AT03723565
申请日：2003-04-25
申请人： GLOBAL IP SOLUTIONS INC , GLOBAL IP SOLUTIONS GIPS AB
发明人： HAENDEL PETER , BERGENHEIM JON , REMLE SUSANNE
IPC分类号： H04B3/23
摘要： The present invention relates to a cancellation of echoes in telecommunications systems, more specifically it relates to adaptive alignment of a linear filter ( 500 ) used for echo cancellation. According to the invention, it is continuously determined, by means of control logic ( 520 ), if a reflection replica delay included in an echo replica signal (110), which delay is provided by a signal buffer ( 510 ), should be attempted to be increased or not. Similarly, it is continuously determined if the reflection replica delay should be attempted to be decreased or not. In this way it is possible to provide a delay of the reflection replica which corresponds to the pure delay of a corresponding reflection included in an echo signal (120) received over an echo path. The invention is advantageous since the filter ( 500 ) will continuously and quickly adapt to changes in the echo path delay by continuously increasing or decreasing, in an incremental and smooth manner, a present replica delay.

29. 发明专利

CA2735564C MULTICAST RATE OPTIMIZATION 未知
公开(公告)号：CA2735564C
公开(公告)日：2013-11-12
申请号：CA2735564
申请日：2009-08-20
申请人： GLOBAL IP SOLUTIONS GIPS AB , GLOBAL IP SOLUTIONS INC
发明人： KOZICA ERMIN
IPC分类号： H04W4/06
摘要： This invention relates to multicast rate optimization, particularly a method for controlling an encoder (1) in a communications system (3) including a plurality of receivers (2). The method includes partitioning the receivers (2) into at least one cell, and associating each cell with a specific rate that may be used to transmit signals to a receiver (2). According to the inventive method, uncertainties in estimates of conditions of the communications system (3) are taken into account by modelling the conditions, such as the average distortion perceived by the receivers (2), as the outcome of a stochastic variable, thereby accounting for uncertainties in the estimates of the conditions of the communications system (3). The invention also relates to an encoder associated with the method.

30. 发明专利

CA2746794A1 DELAY ESTIMATOR 未知
公开(公告)号：CA2746794A1
公开(公告)日：2010-06-17
申请号：CA2746794
申请日：2009-10-20
申请人： GLOBAL IP SOLUTIONS GIPS AB , GLOBAL IP SOLUTIONS INC
发明人： KLEIJN WILLEM BASTIAAN
IPC分类号： H04M9/08
摘要： The present invention provides a method and apparatus for finding an estimate of the delay of a signal travelling between two points. A quantity is evaluated from the signal at a final number of time instants, at both a reference point and a reception point. The values are quantized by comparison with a threshold adapted to a typical magnitude of the quantity. If the quantized values from the reception point are shifted back by the true delay with respect to the quantized values from the reference point, then certain co-occurrences of quantized values have very low probability. Hence, the best delay estimate is that shift which yields the least number of low-probability co-occurrences.

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