VIDEO ENCODING AND DECODING WITH CHROMINANCE SUB-SAMPLING
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United States of America Patent
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Issued Date -
Mar 6, 2014
app pub date -
Sep 5, 2013
filing date -
Sep 6, 2012
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Abstract
In video encoding, a video input received in 4:2:2 is resampled. Residuals are formed through the use of reference samples stored in the native 4:2:2, before transforming, quantising and entropy coding to form an encoded bitstream in the resampled format. The encoded bitstream contains a message indicating chrominance resampling and a selected chrominance resampling filter for the decoder to use. An encoder may have a first mode in which the 4:2:2 is up-sampled to 4:4:4 and a second mode in which the 4:2:2 is down-sampled to 4:2:0.
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