Patent ID: 9698820
Date: 2017-07-04
CPC Classifications: H03M,H04N

Claim:
1. A non-transitory computer-readable storage medium on which a program is stored, enabling a computer, after having been loaded into the memory of the computer, to perform a method for video decoding, the method comprising the steps of: decoding a significance mapping; and decoding a subsequent coding of values of transform coefficients being unequal to zero for blocks of video pictures containing transform coefficients being unequal to zero, the significance map specifying the positions of the transform coefficients being unequal to zero in a scan order, and the coding of values of transform coefficients being unequal to zero comprising coded values of the transform coefficients being unequal to zero in a reverse scan order-starting with the last transform coefficient being unequal to zero, wherein the decoding the significance mapping is performed in the scan order, and wherein the decoding of the subsequent coding of the values of transform coefficients being unequal to zero includes, in the reverse scan order, binary entropy decoding bins of a binarization of a magnitude of the transform coefficients being unequal to zero in a context-dependent way using contexts depending on how many transform coefficients having a magnitude of 1 have already been decoded in the reverse scan order up to the respective currently decoded transform coefficient, with decoding all bins of the binarization of the respective currently to be decoded transform coefficient being unequal to zero before proceeding with decoding the bins of the binarization of a—in the reverse scan order—succeeding transform coefficient being unequal to zero.