compress_dwt
2016-08-23
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Differential pulse code modulation (DPCM) is an efficient data compression technique, which is
useful for reducing transmission rate of digital picture information. The use of DPCM in image coding,
however, requires some caution when transmission errors occur, because in the reconstructed DPCM
image transmission errors tend to propagate and severely degrade the image quality[1]. To overcome the
difficulty, error robust schemes such as hybrid DPCM[1 -3] have been proposed.
In this paper, we introduce a DPCM system employing nonlinear median predictors, which is called
the predictive median (PM)-DPCM, and show that the PM-DPCM is resistant to transmission errors.
useful for reducing transmission rate of digital picture information. The use of DPCM in image coding,
however, requires some caution when transmission errors occur, because in the reconstructed DPCM
image transmission errors tend to propagate and severely degrade the image quality[1]. To overcome the
difficulty, error robust schemes such as hybrid DPCM[1 -3] have been proposed.
In this paper, we introduce a DPCM system employing nonlinear median predictors, which is called
the predictive median (PM)-DPCM, and show that the PM-DPCM is resistant to transmission errors.
c++
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