Embedded coring in MPEG video compression

Author

Van Roosmalen, Peter M B ; Lagendijk, Reginald L. ; Biemond, Jan

Author_Institution

Fac. of Inf. Technol. & Syst., Delft Univ. of Technol., Netherlands

Volume

12

Issue

3

fYear

2002

fDate

3/1/2002 12:00:00 AM

Firstpage

205

Lastpage

211

Abstract

Coring is a well-known technique for removing noise from images. The mechanism of coring consists of transforming a noise-degraded image into a frequency-domain representation, followed by a reduction of the image transform coefficients by a (nonlinear) coring function. After inverse transforming the cored coefficients, the noise-reduced image is obtained. We show that coring can be embedded into MPEG encoders with relatively little additional complexity. We exploit the statistical properties of the DCT coefficients to find the optimal Bayesian coring function for each of the DCT coefficients. Experimental results show the effectiveness of the MPEG-embedded coring function on compressing noisy image sequences

Keywords

Bayes methods; code standards; data compression; discrete cosine transforms; frequency-domain analysis; image representation; image sequences; noise; nonlinear functions; quantisation (signal); telecommunication standards; transform coding; video coding; DCT coefficients quantization; MPEG encoders; MPEG video compression; embedded coring; frequency-domain representation; image transform coefficients reduction; noise removal; noise-degraded image; noisy image sequence compression; nonlinear coring function; optimal Bayesian coring function; Discrete cosine transforms; Frequency; Image coding; Image sequences; Noise level; Noise reduction; Transform coding; Video compression; Wavelet domain; White noise;

fLanguage

English

Journal_Title

Circuits and Systems for Video Technology, IEEE Transactions on

Publisher

ieee

ISSN

1051-8215

Type

jour

DOI

10.1109/76.993441

Filename

993441