5 September 1989 An Adaptive DPCM Compression Scheme For Real-Time Applications
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Abstract
Differential pulse code modulation (DPCM) is a predictive coding scheme which has been studied extensively. This paper describes an adaptive DPCM compression scheme which is based on an algorithm used in National Image Transmission Format (NITF). This scheme estimates the pixel values using linear and bilinear interpolations. It allows more bits to be assigned to pixels in the noisy areas of the image and fewer bits to pixels in the homogeneous areas. Therefore the prediction is more reliable and the bit-rate reduction is more effective. Furthermore, in this paper, a method is proposed which optimizes the quantization of prediction residuals in the sense that the decision levels and output levels are chosen to minimize the mean square quantization error. Results of applying this technique to a gray-scale image are presented. Performance measures are also given. In addition, comparisons are made between this scheme and the algorithm used in NITF.
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Sylvia S. Shen, Sylvia S. Shen, } "An Adaptive DPCM Compression Scheme For Real-Time Applications", Proc. SPIE 1099, Advances in Image Compression and Automatic Target Recognition, (5 September 1989); doi: 10.1117/12.960461; https://doi.org/10.1117/12.960461
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