Video compression using sub-sampling
OwnerSimon Kelly, Trevor Grant Clarkson +1inventors
InventorsSimon Kelly, Trevor Grant Clarkson, Il-Song Han
Life of this patent
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Abstract
A video signal is compressed by alternately removing predetermined arrangements of pixels, e.g. odd and even lines. In the case of an interlaced video signal, this may comprise removing the even fields of odd frames and odd fields of even frames. Two such compressed signals may be combined and transmitted in a channel having a bandwidth sufficient for one uncompressed signal only. In the case of non-interlaced video signals, odd and even lines, for example, may be removed from alternate frames. The removed lines can be replaced with odd and even lines taken from another video signal to produce a compressed video signal in which the lines are alternately from first and second uncompressed video signals.
Claims27
A method of compressing a video signal, the method comprising removing a first set of pixels from a first frame of the video signal comprising a plurality of frames and removing a second set of pixels from a second immediately succeeding frame of the video signal, characterised in that the same pixels are not removed from both of said frames.
A method of transmitting a video signal comprising compressing a video signal by a method according to any preceding claim and transmitting the compressed video signal.
Dependencies are inferred from the claim text.