Title :
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
fDate :
3/1/2002 12:00:00 AM
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;
Journal_Title :
Circuits and Systems for Video Technology, IEEE Transactions on
