%0 Journal Article
%T 水印鲁棒性:纠错编码有效吗?
%A 黄继武
%A 谷利民
%A 施云庆
%J 自动化学报
%P 683-692
%D 2005
%X ？Robustnessisoneofthemostimportantrequirementsofdigitalwatermarkingformanyapplications.Spread-spectrumbasedmethodsarenoteffectiveenoughtoensuretheirrobustness.Bymodelingdigitalwatermarkingasdigitalcommunications,severalresearchersproposedusingerrorcorrectingcoding(ECC)toimproverobustness.However,animportantfactthathaslongbeenneglectedisthatduetotheimperceptibilityrequirement,theredundancyintroducedbyECCwillleadtoadecreaseofthemagnitudeofwatermarksignal.Therefore,aproblemarisesnaturally:CouldtheusageofECCeffectivelyimprovetherobustnessofwatermarking?Thispaperaddressesthisproblemfromtheperspectivesofboththeoreticalanalysisandexperimentalinvestigation.OurinvestigationshowsthatECCcannoteffectivelyimprovetherobustnessofwatermarkingagainstagreatmajorityofvariousattacksexceptforcroppingandjitterattacks.Hence,ECCshouldnotbeconsideredasauniversalmeasurethatcanbeemployedtoenhancerobustnessofwatermarking.
%K Digitalwatermarking
%K errorcorrectingcoding(ECC)
%K robustness
%K binarysymmetricchannel(BSC)
%U http://www.aas.net.cn/CN/abstract/abstract15997.shtml