Patent ID: 9036710
Filing Date: 2015-05-19
Classification: H03M,H04N

Abstract:
1. A method of reconstructing coefficient levels from a bitstream of encoded video data for a coefficient group in a transform unit, wherein the bitstream includes encoded significant-coefficient flags indicating non-zero coefficients in the coefficient group, the method comprising: dynamically setting a threshold based upon level information from one or more previously-reconstructed neighboring coefficient groups in the transform unit, wherein the threshold sets a maximum number of level flags that may be decoded for the coefficient group; decoding, in a scan order, level flags for the non-zero coefficients in the coefficient group unless the threshold number of decoded level flags is reached; decoding level data, if any, for non-zero coefficients in the coefficient group based upon the decoded level flags; and reconstructing the coefficient levels for the coefficient group from the decoded level data and the decoded level flags.