VIDEO CODING AND DECODING
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United States of America Patent
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Issued Date -
Aug 27, 2015
app pub date -
Jun 19, 2013
filing date -
Jun 19, 2012
priority date (Note) -
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Abstract
In video encoding, where image values are transformed to provide transform coefficients and transform coefficients are quantised to derive a compressed bitstream, an ID profile is selected at the encoder and used with a representative image intensity to scale image values in the block. The selected ID profile is signalled to the decoder with the compressed bitstream. At the decoder, the ID profile is extracted from the compressed bitstream and—after performing inverse quantisation and an inverse transform to form image values—those image values are inverse scaled.
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