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1. (WO2013112744) COMPRESSED DOMAIN WATERMARKING WITH REDUCED ERROR PROPAGATION

Pub. No.:    WO/2013/112744    International Application No.:    PCT/US2013/023000
Publication Date: Fri Aug 02 01:59:59 CEST 2013 International Filing Date: Fri Jan 25 00:59:59 CET 2013
IPC: H04L 29/06
Applicants: FUTUREWEI TECHNOLOGIES, INC.
XUE, Jingteng
TIAN, Jun
Inventors: XUE, Jingteng
TIAN, Jun
Title: COMPRESSED DOMAIN WATERMARKING WITH REDUCED ERROR PROPAGATION
Abstract:
Error drift during compressed domain watermarking can be reduced by embedding watermarking symbols in macroblocks that have relatively low influence on pixel values of other macroblocks during video decompression. This influence may be quantified using compression influence values (CIVs), which may be computed/assigned based on prediction dependency relationships amongst the various macroblocks in a sequence of frames. To wit, high CIVs are assigned to macroblocks that heavily influence the pixel values of other macroblocks during intra-frame/inter-frame prediction, while low CIVs are assigned to macroblocks that have little influence over the pixel values of other macroblocks. Macroblocks having the lowest CIVs may be selected for embedding compressed domain watermarking bits/symbols. Alternatively, macroblocks having high CIVs may be excluded from a pool of candidate macroblocks that are eligible for carrying embedded compressed domain watermarking bits/symbols.