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

Author

Yang, Jinwha ; Delp, Edward J.

Author_Institution

Video & Image Process. Lab., Purdue Univ., West Lafayette, IN, USA

Volume

2

fYear

2004

fDate

24-27 Oct. 2004

Firstpage

805

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.

Keywords

Gaussian distribution; Markov processes; data compression; discrete cosine transforms; image coding; maximum likelihood estimation; DCT coefficient; GMRF model; Gauss-Markov random field; JPEG; MAP estimation; interleaved image compression; maximum a posteriori; packet error; source symbol encoding; Automatic repeat request; Communication networks; Decoding; Discrete cosine transforms; Image coding; Image restoration; Interleaved codes; Laboratories; Markov random fields; Streaming media;

fLanguage

English

Publisher

ieee

Conference_Titel

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

ISSN

1522-4880

Print_ISBN

0-7803-8554-3

Type

conf

DOI

10.1109/ICIP.2004.1419420

Filename

1419420