The optimal transform of motion-compensated frame difference images in a hybrid coder

Author

Chen, Chi-Fa ; Pang, Khee K.

Author_Institution

Dept. of Electr. & Comput. Syst. Eng., Monash Univ., Clayton, Vic., Australia

Volume

40

Issue

6

fYear

1993

fDate

6/1/1993 12:00:00 AM

Firstpage

393

Lastpage

397

Abstract

Using the statistical model proposed by the authors (1992), various statistical characteristics of motion-compensated frame difference (MCFD) images are derived. It is shown that the optimum Karhunen-Loeve (KLT) or the MCFD images is in fact identical to that of the original image sequence in intraframe mode, and that the discrete cosine transform (DCT) remains near optimal. The study this provides insights into the working of the MPEG and H.261 coders, including the justification for using the same DCT for both intra and interframe modes. Experiments on standard image sequences confirm the accuracy of the statistical model

Keywords

discrete cosine transforms; image coding; image sequences; H.261; MCFD images; MPEG; discrete cosine transform; hybrid coder; image sequence; interframe modes; intraframe modes; motion-compensated frame difference images; optimal transform; optimum Karhunen-Loeve; statistical model; Decorrelation; Discrete Fourier transforms; Discrete cosine transforms; Discrete transforms; Fast Fourier transforms; Image analysis; Image sequences; Karhunen-Loeve transforms; Motion compensation; Statistics;

fLanguage

English

Journal_Title

Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

1057-7130

Type

jour

DOI

10.1109/82.277884

Filename

277884