PIECEWISE INTER-LAYER PREDICTION FOR SIGNALS WITH ENHANCED DYNAMIC RANGE
摘要
Pixel data of a video sequence with enhanced dynamic range (EDR) are predicted based on pixel data of a corresponding video sequence with standard dynamic range (SDR) and a piecewise inter-layer predictor. The output parameters of the piecewise predictor are computed based atleast on two sets of pre-computed values and a prediction cost criterion. The first set of pre-computed values applies to all input SDR frames and comprises a set of SDR pixel values raised to one or more integer power terms. The second set of pre-computed values is frame specific and is computed based on a histogram of an input SDR frame and pixel values of the corresponding EDR frame. The pre-computed values allow for a fast iterative algorithm to identify the best pivot points for the piecewise polynomials according to a prediction cost and to solve for the coefficients of the piecewise predictor.
申请公布号
WO2015123067(A1)
申请公布日期
2015.08.20
申请号
WO2015US14482
申请日期
2015.02.04
申请人
DOLBY INTERNATIONAL AB;DOLBY LABORATORIES LICENSING CORPORATION
发明人
SU, GUAN-MING;CHEN, QIAN;YIN, PENG;WILLENBACHER, RALF