A high-performance SPIHT-based image and video codec for surveillance
by Bibhuprasad Mohanty; Pramod Kumar Verma; Sudipta Mahapatra
International Journal of Signal and Imaging Systems Engineering (IJSISE), Vol. 6, No. 2, 2013

Abstract: A novel extension to wavelet transformed image and video codec based on SPIHT is presented for the purpose of surveillance where the detail information regarding a scene is not an essential requirement. A pre-processing scheme, called Zero-Shifting, has been proposed using which calculation of transformed coefficients becomes more consistent. This modification leads to a significantly higher PSNR and better visual quality at a specific bit rate with little additional computational complexity. We achieved 1.5-4.2 dB more gain at the lowest possible bit rate without using entropy coder, which provides only 0.3-0.6 dB increase in gain at the cost of higher computational complexity and reduced speed of the SPIHT codec.

Online publication date: Sun, 21-Apr-2013

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