The Center for Education and Research in Information Assurance and Security (CERIAS)

The Center for Education and Research in
Information Assurance and Security (CERIAS)
Center for Education and Research in Information Assurance and Security

Markov random field estimation of lost DCT coefficients in JPEG due to packet errors

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Author

J Yang, E Delp

Entry type

article

Abstract

Interleaving is used before the encoding of source symbols in JPEG to reduce visual artifacts due to lost packets because interleaving distributes the locations of errors. The recovery of lost DCT coefficients in interleaved image compression is investigated in this paper. To restore the lost coefficients, an Maximum a Posteriori (MAP) estimate for the DCT coefficients is proposed. Under the assumption of a Gauss-Markov Random Field (GMRF) model in the pixel domain, the MAP estimate for the lost DCT coefficients is derived.

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Date

2004 – 10

Journal

Image Processing, 2004. ICIP '04. 2004 International Conference on

Key alpha

Delp

Pages

805-808

Volume

2

Publication Date

2004-10-01

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