کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
532470 869962 2014 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
An improved reversible data hiding-based approach for intra-frame error concealment in H.264/AVC
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر چشم انداز کامپیوتر و تشخیص الگو
پیش نمایش صفحه اول مقاله
An improved reversible data hiding-based approach for intra-frame error concealment in H.264/AVC
چکیده انگلیسی


• MV is embedded into the coefficients by an improved histogram shifting technique.
• The improvements include flexible zone, dynamic frequency band, and block selection.
• The hidden MV is extracted from the corresponding MB to recover the corrupted MB.

As H.264/AVC video streams are highly compressed, they become sensitive to errors caused by unreliable transmission channels. In order to address this issue, an improved version of Chung et al.’s reversible data hiding-based approach for intra-frame error concealment is proposed for H.264/AVC codec. By using the histogram shifting technique, the original work reversibly embeds the motion vector (MV) of a macroblock (MB) into other MB within the same intra-frame. If an MB is corrupted at the decoder side, the embedded MV can be extracted from the corresponding MB for the recovery of the corrupted MB. However, Chung et al.’s work did not fully exploit the number of coefficients which need to be modified in order to reversibly hiding data, and did not consider many extra nonzero residual blocks produced by data hiding. These two issues could reduce the visual quality of the stego-video. This paper adopts MV data pre-processing, the selection of most suitable embedding region, and the minimum possible amount of histogram modification, which lead to higher PSNR of the stego-video for a given payload. Experimental results further reveal that the proposed method offers stego-video with better visual quality over Chung et al.’s work.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Visual Communication and Image Representation - Volume 25, Issue 2, February 2014, Pages 410–422
نویسندگان
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