Title: A high-performance SPIHT-based image and video codec for surveillance

Authors: Bibhuprasad Mohanty; Pramod Kumar Verma; Sudipta Mahapatra

Addresses: Department of Electronics and Electrical Communication, Indian Institute of Technology, Kharagpur, India ' Department of Electronics and Electrical Communication, Indian Institute of Technology, Kharagpur, India ' Department of Electronics and Electrical Communication, Indian Institute of Technology, Kharagpur, India

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.

Keywords: zero shifting; set partitioning; hierarchical trees; SPIHT codec; video codec; surveillance; pre-processing; transformed coefficients; visual quality; wavelets; image codec.

DOI: 10.1504/IJSISE.2013.053415

International Journal of Signal and Imaging Systems Engineering, 2013 Vol.6 No.2, pp.75 - 82

Received: 08 Feb 2011
Accepted: 26 May 2011
Published online: 21 Apr 2013 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article