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公开(公告)号：EP3257251A1
公开(公告)日：2017-12-20
申请号：EP15790189.3
申请日：2015-10-21
发明人： LAMBERT, Robert , INNES, Gordon , DIDSBURY, Andrew
IPC分类号： H04N21/2187 , H04N21/234 , H04N21/2343 , H04N21/236 , H04N21/24 , H04N21/437 , H04N21/61 , H04N21/6583 , H04N21/81 , H04N7/18
摘要： A video encoder (2) is disclosed for sending video data to a server (4) over a channel. A video compressor (16) can compress video data using an adjustable compression factor. A multiplexer/pack constructor (18) can receive compressed video from the compressor, together with non-video data, and can queue data for transmission. A bandwidth monitor (20) is provided for monitoring the performance of the channel based on the behaviour of transmitted data packets, including their round-trip travel time to and from the server (4). The compressor (16) can modify the adjustable compression factor based on the performance of the channel, as determined by the bandwidth monitor, and the amount of non-video data received by the packet constructor Specifically, the compression factor can be changed so that video data can be transmitted promptly but with reduced quality if there is less bandwidth available and if space is required in the channel for non-video data. This can permit transmission of non-video data without disrupting the live video feed or introducing any delay.
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公开(公告)号：EP3257251B1
公开(公告)日：2020-09-16
申请号：EP15790189.3
申请日：2015-10-21
发明人： LAMBERT, Robert , INNES, Gordon , DIDSBURY, Andrew
IPC分类号： H04N21/2187 , H04N21/234 , H04N21/2343 , H04N21/236 , H04N21/24 , H04N21/437 , H04N21/61 , H04N21/6583 , H04N21/81 , H04N7/18
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公开(公告)号：EP3363200A1
公开(公告)日：2018-08-22
申请号：EP16770318.0
申请日：2016-09-15
发明人： LAMBERT, Robert
IPC分类号： H04N19/147 , H04N19/115 , H04N19/146 , H04N19/176 , H04N19/154 , H04N19/103 , H04N19/192
CPC分类号： H04N19/115 , H04N19/103 , H04N19/146 , H04N19/147 , H04N19/154 , H04N19/176 , H04N19/192
摘要： A method of compressing an array of data entries in the form of digital electronic signals, the method including determining a plurality of possible compressed encodings for each block of the array using a respective different compression technique for each encoding of the block, wherein each possible compressed encoding has a respective data size and a respective reconstruction error; and generating a list of the plurality of compressed encodings and selecting that one of the plurality of compressed encodings from the list which, when uncompressed and added to the reference data array, provides the largest relative improvement in reconstruction error per unit increase in data size. A compressed encoding of the original data array may then be updated by adding the selected compressed encoding, and a reference data array may be updated by adding the selected encoding in uncompressed form. These steps may be different combinations of macro block regions repeated recursively until a maximum data size is achieved for the compressed encoding of the original data array.
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公开(公告)号：EP2907192B1
公开(公告)日：2018-01-31
申请号：EP13750124.3
申请日：2013-08-12
CPC分类号： H01Q1/36 , G01V1/16 , G01V1/166 , G08B13/1663 , H01Q1/04 , H01Q1/22 , H01Q1/42 , H01Q9/0421 , H01Q9/36
摘要： An unattended ground sensor unit (30) is disclosed comprising an antenna (2) which is accommodated mainly in a head portion (5) of the unit. The antenna (2) comprises a base conductor (100) and a top conductor (102), both of which are circular plates arranged in a horizontal plane. An antenna rod (204) is electrically connected to the top conductor (102). A hole is provided in the base conductor (100) and the antenna rod (204) extends through the hole to be connected to antenna control circuitry on a printed circuit board (104) on the reverse side of the base conductor (100). An insulating ring (106) is provided around the antenna rod (204) where it extends through the base conductor (100) so that the antenna (rod 204) is electrically insulated from the base conductor (100). Two shorting pins (205) are provided between the top conductor (102) and the base conductor (100). The shorting pins (20) are provided on diametrically opposite sides of the antenna rod (204). A dielectric spacer (202) is provided having a keying cutout (112) that can be engaged to resist its rotation.
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