Title :
Joint pre- and post-filter design for decimation-interpolation systems with applications to television pictures
Abstract :
The author discusses the design of pre- and post-filters for a system where down-sampling (decimation) is followed by up-sampling (interpolation). This is called a decimation-interpolation system. Some important properties of decimation-interpolation systems are discussed. A theoretical result is presented where necessary and sufficient conditions are given to eliminate frequency aliasing. Based on this theoretical result, an iterative two-step joint pre- and post-filter design algorithm is presented which implicitly suppresses aliasing. Characteristics of the design method are discussed along with some examples
Keywords :
filtering and prediction theory; interpolation; iterative methods; picture processing; video signals; decimation-interpolation systems; down-sampling; frequency aliasing elimination; iterative two-step algorithm; post-filter design; pre-filter design; television pictures; up-sampling; Aircraft; Convolution; Design methodology; Fourier transforms; Frequency domain analysis; Image processing; Mirrors; Signal analysis; Sufficient conditions; TV;
Conference_Titel :
Telecommunications Symposium, 1990. ITS '90 Symposium Record., SBT/IEEE International
Conference_Location :
Rio de Janeiro
DOI :
10.1109/ITS.1990.175664
