Patent ID: 9712836
Date: 2017-07-18
CPC Classifications: H04N

Claim:
1. A method of decoding a significance map from an encoded bitstream, the method comprising: identifying a scan pattern over which a plurality of discrete sets of flags are arranged; decoding a set index value from the bitstream, the set index value identifying a set of flags from the plurality of discrete sets of flags, the set of flags including a last significant coefficient flag of the significance map, and at least one zero-valued significant coefficient flag located after the last significant coefficient flag in a forward direction of the scan pattern, wherein each significant coefficient flag of the significance map is associated with one of the plurality of discrete sets of flags; and decoding individual significance flags and writing the decoded values into the significance map according to the scan pattern and including all significance flags located before the identified set of flags, according to the identified scan pattern, and for an entirety of the identified set of flags.