Method and apparatus for encoding/decoding a high dynamic range picture into a coded bitstream
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United States of America Patent
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May 11, 2021
Grant Date -
Apr 25, 2019
app pub date -
Apr 25, 2017
filing date -
May 4, 2016
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Abstract
A method and an apparatus for decoding at least one high dynamic range picture from a coded bitstream and a method and corresponding apparatus for coding the bitstream are disclosed. A standard dynamic range picture is decoded from the coded bitstream, a set of pivot points is decoded from the coded bitstream. The set of pivot points is representative of an adjustment function fadj. A predefined color correction function bp_default is selected. An adjusted color correction function badj is determined by 1/badj [γ]=fadj [γ]×(1/bp_default[γ]), where γ is a luminance value. The high dynamic range picture is reconstructed from the decoded standard dynamic range picture and the adjusted color correction function badj.
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