A Novel Error Concealment Method for Images Using Watermarking in Error-Prone Channels
Konferenz: PIMRC 2005 - 16th Annual IEEE International Symposium on Personal Indoor and Mobile Radio Communications
11.09.2005 - 14.09.2005 in Berlin, Germany
Tagungsband: PIMRC 2005
Seiten: 5Sprache: EnglischTyp: PDFPersönliche VDE-Mitglieder erhalten auf diesen Artikel 10% Rabatt
Gür, Gürkan; Alagöz, Fatih (Department of Computer Engineering, Bo?aziçi University, Turkey)
AbdelHafez, Mohammed (Department of Electrical Engineering, United Arab Emirates University, UAE)
In this paper, we propose a new error concealment method for covering up the high packet losses of an original image after its transmission through an error-prone channel. Error-concealment techniques provide a simple framework to compensate these distortions without incurring additional delays and wasting bandwidth resources which are crucial for real-time applications over networks with limited resources. Unfortunately, most of the existing error-concealment techniques work only if the packet losses are smaller than a threshold and/or they are uniformly distributed. Utilizing data hiding techniques is a potential approach to overcome this restriction. We investigated an error concealment technique utilizing discrete wavelet transform (DWT) for embedding macroblock-based BNM (bestneighborhood- matching) information into the original image in order to utilize spatial redundancy. We propose that this technique can be implemented for error-prone channels to combat such degradations in a backward-compatible scheme. We show that the proposed error concealment technique is a promising one, especially for the erroneous channels causing a wider range of packet losses, at the expense of some degradation in the perceptual quality of the original image.