NDLI: Error concealment using multiple description coding and LIoyd-max quantization

Content Provider	IEEE Xplore Digital Library
Author	Farzamnia, A. Syed-Yusof, S.K. Fisal, N.
Copyright Year	2011
Description	Author affiliation: Faculty of Electrical Engineering Universiti Teknologi Malaysia, Johor Bahru, Malaysia (Syed-Yusof, S.K.) \|\| Faculty of Electrical Engineering Universiti Teknologi Malaysia Johor Bahru, Malaysia (Farzamnia, A.; Fisal, N.)
Abstract	There has been increasing usage of Multiple Description Coding (MDC) for error concealment in non ideal channels. This paper attempts to conceal the error and reconstruct the lost descriptions by combining MDC and LIoyd-max quantizer. At first original image downsampled to four subimages then by using wavelet transform each subimage is mapped to transform domain then descriptions are quantized by LIoyd-max and coded. Since in proposed method wavelet transform is been used, there could be no blocking effect as compared to DCT transform. The results show that average MSE (mean square error) for our proposed method in comparison with DCT method (in other paper) has decreased from 240 to 152 in 0.625 bpp (bit per pixel), from 161 to 107 in 1 bpp and from 96 to 73 in 2 bpp in rate-distortion performance. Therefore, this method is suitable for low capacity channels. By losing descriptions, the obtained image is still in good quality (subjective evaluation and PSNR values) as compared to a method which is DCT and MDSQ (multiple description scalar quantization).
Starting Page	197
Ending Page	201
File Size	1016142
Page Count	5
File Format	PDF
ISBN	9781612846897
e-ISBN	9781612846910
DOI	10.1109/ISCI.2011.5958910
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-03-20
Publisher Place	Malaysia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Wavelet transforms PSNR Image coding Quantization Image reconstruction Pixel
Content Type	Text
Resource Type	Article

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