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Telfor Journal
2016, vol. 8, br. 2, str. 115-120
jezik rada: engleski
vrsta rada: neklasifikovan

Error concealment using data hiding in wireless image transmission
(naslov ne postoji na srpskom)
aDepartment of Signal, Images and Telecommunications (SITe), Institut Superieurd' Electronique de Paris, rue Notre Dame des Champs, Paris, France
bDepartment of Electrical and Electronics, Shiraz University of Technology, Shiraz, Iran
cLaboratoire d'Informatique de Paris (LIP), Pierre et Marie Curie University, Paris, France



(ne postoji na srpskom)
The transmission of image/video over unreliable medium like wireless networks generally results in receiving a damaged image/video. In this paper, a novel image error concealment scheme based on the idea of data hiding and Set Partitioning In Hierarchical Trees (SPIHT) coding is investigated. In the encoder side, the coefficients of wavelet decomposed image are partitioned into 'perfect trees'. The SPIHT coder is applied to encode each perfect tree independently and generate an efficiently compressed reference code. This code is then embedded into the coefficients of another perfect tree which is located in a different place, using a robust data hiding scheme based on Quantization Index Modulation (QIM). In the decoder side, if a part of the image is lost, the algorithm extracts the embedded code for reference trees related to this part to reconstruct the lost information. Performance results show that for an error prone transmission, the proposed technique is promising to efficiently conceal the lost areas of the transmitted image.

Ključne reči

wireless networks; error concealment; data hiding; SPIHT; image transmission


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