NDLI: Modelling of image distortion processes associated in video-phone systems and descriptors for image quality

Content Provider	IEEE Xplore Digital Library
Author	Tan Hak Hwee Arichandran, K.
Copyright Year	1995
Description	Author affiliation: Dept. of Electron. & Commun. Eng., Singapore Polytech., Singapore (Tan Hak Hwee)
Abstract	A variety of video-phone systems have begun to appear in the consumer market. The quality of the images generated by these systems is severely affected by the bandwidth restriction of the twisted cable pair. Typically, some of these systems operate with a transmission bit rate less than 19.2 kbps. In comparing different systems with respect to image quality, one finds it useful to assess the qualify in terms of descriptors that would represent the subjective assessment more naturally. In this paper, we investigate the possible use of fuzzy set descriptor for the video-phone image. In order to do this, we examine the types of image distortion processes that are obtained in such video-phone systems. We consider three physical effects, namely blurring due to defocusing, blurring due to motion of subject, additive electrical noise in the transmission systems. In addition to the physical distortion processes, we consider distortion due to software artifacts, mainly arising from the use of lossy compression algorithms as well as the associated image blocking effects.
Starting Page	473
Ending Page	477
File Size	471569
Page Count	5
File Format	PDF
ISBN	0780325796
DOI	10.1109/SICON.1995.526332
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-07-03
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Videophone systems Additive white noise Image quality Pixel Noise generators Consumer electronics Image generation Additive noise Compression algorithms Filters
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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