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1. (WO2018002052) METHOD AND APPARATUS FOR IMPROVED SIGNIFICANCE FLAG CODING USING SIMPLE LOCAL PREDICTOR

Pub. No.:    WO/2018/002052    International Application No.:    PCT/EP2017/065859
Publication Date: Fri Jan 05 00:59:59 CET 2018 International Filing Date: Wed Jun 28 01:59:59 CEST 2017
IPC: H04N 19/13
H04N 19/18
H03M 7/40
Applicants: INTERDIGITAL VC HOLDINGS, INC.
Inventors: LASSERRE, Sébastien
ANDRIVON, Pierre
BORDES, Philippe
Title: METHOD AND APPARATUS FOR IMPROVED SIGNIFICANCE FLAG CODING USING SIMPLE LOCAL PREDICTOR
Abstract:
Significance flags in advanced video compression systems are coded using contexts adaptive to the last N significance flags coded taken in a scanning order. One embodiment uses the last N significance flags in scanning order as a predictor to determine which of a plurality of sets of significance flag contexts to use for coding subsequent significance flags. A second embodiment uses the last N significance flags in scanning order as a predictor in order to modulate the probability value associated with significance flag contexts that are used to code significance flags for future coding.