Shape-adaptive DCT for generic coding of video

Author

Sikora, Thomas ; Makai, Bela

Author_Institution

Dept. of Digital Image Process., Heinrich-Hertz-Inst. fur Nachrichtentech. Berlin GmbH, Germany

Volume

5

Issue

1

fYear

1995

fDate

2/1/1995 12:00:00 AM

Firstpage

59

Lastpage

62

Abstract

A low complexity shape-adaptive DCT algorithm suitable for coding pels in arbitrarily shaped image segments is introduced. In contrast to other techniques described in literature the proposed algorithm is based on predefined orthogonal sets of DCT basis functions and does not require more computations than a normal block DCT. It is shown that the shape-adaptive DCT algorithm can be easily incorporated into existing block-based JPEG, H.261, or MPEG coding schemes. Thus segment or object based coding of images and video can be provided with backward compatibility to existing coding standards. As an important feature, with the proposed technique additional content based functionalities currently discussed in the MPEG-4 standardization phase can be readily achieved

Keywords

discrete cosine transforms; image segmentation; video coding; DCT basis functions; H.261; JPEG; MPEG coding; MPEG-4 standardization; backward compatibility; block-based coding; coding standards; image segments; shape-adaptive DCT algorithm; video coding; Circuits; Discrete cosine transforms; Entropy; Image coding; Image segmentation; Motion compensation; Motion estimation; Signal processing algorithms; Sun; Videoconference;

fLanguage

English

Journal_Title

Circuits and Systems for Video Technology, IEEE Transactions on

Publisher

ieee

ISSN

1051-8215

Type

jour

DOI

10.1109/76.350781

Filename

350781