NDLI: Variable block-size double predictor DPCM (VBDP-DPCM) image transmission system over wireless fading channel

Content Provider	IEEE Xplore Digital Library
Author	Jia-Chyi Wu Chung, N.H.C.
Copyright Year	2004
Description	Author affiliation: Dept. of Commun. & Guidance Eng., Nat. Taiwan Ocean Univ., Keelung, Taiwan (Jia-Chyi Wu)
Abstract	A variable blocksize double predictor differential pulse code modulation (VBDP-DPCM) image coding algorithm is utilized for image transmission over Rayleigh fading channels. Quadtree segmentation algorithm is applied to divide a given digital image into segments of variable size, square blocks, in which the nonstationary statistical characteristics of the given image source can be better exploited. Each variable blocksize sub-image is then applied the double predictor DPCM (DP-DPCM) coding scheme to further reduce the quantization error and produce a better data compression ratio than that of a DPCM scheme. To improve the system performance for transmitting VBDP-DPCM encoded images over wireless fading channel, we have adopted the quadrature phase shift keying (QPSK) modulation as well as a channel coding algorithm in this study. The convolutional encoder and maximum-likelihood Viterbi hard decision decoder are applied to protect the transmitted source data and to reduce bit error rate (BER) in fading channel. Performance of this VBDP-DPCM image transmission system over Rayleigh fading channel is evaluated in this research.
Starting Page	3183
Ending Page	3187
File Size	749343
Page Count	5
File Format	PDF
ISBN	0780379543
ISSN	10903038
DOI	10.1109/VETECF.2003.1286222
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-10-06
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Image communication Fading Pulse modulation Modulation coding Image segmentation Quadrature phase shift keying Bit error rate Image coding Digital images Quantization
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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