NDLI: Towards high quality region-of-interest medical video over wireless networks using lossless coding and motion compensated temporal filtering

Content Provider	IEEE Xplore Digital Library
Author	Rao, S. Jayant, N.
Copyright Year	2005
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA (Rao, S.; Jayant, N.)
Abstract	Telehealth is growing rapidly and there is an increased need for high quality transmission of video over wireless networks. In this paper, we propose a method for achieving high quality within a diagnostically important region-of-interest (ROI) using mathematically lossless (M-lossless) video coding of the ROI and motion compensated temporal filtering (MCTF) of the video. The remaining region (non-ROI) is coded in a lossy manner. MCTF as a prefilter addresses the issue of noise in video. With the correct values of filter parameters, it results in very good denoising for noisy video and improved quality for even near noiseless video. The key motivation to use MCTF in our application is that in both cases it results in significant reduction of the required total bitrate. This is crucial on data rate constrained wireless networks. We also show how MCTF is particularly advantageous for the ROI. We study the advantages of MCTF in terms of (i) quality improvement, and (ii) bitrate reduction. We apply a mean MCTF to filter Additive White Gaussian Noise (AWGN), and propose a new median MCTF to filter impulse noise. The results show that the applied techniques result in substantial improvement in quality and significant total bitrate reduction
Starting Page	618
Ending Page	623
File Size	441665
Page Count	6
File Format	PDF
ISBN	0780393139
DOI	10.1109/ISSPIT.2005.1577168
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-12-21
Publisher Place	Greece
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Wireless networks Additive white noise Gaussian noise Filters Bit rate Filtering AWGN Medical diagnostic imaging Video coding Noise reduction
Content Type	Text
Resource Type	Article

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