Showing papers on "Lossless compression published in 1973"

Minimal gyrator lossless synthesis

Abstract: A synthesis procedure is presented for a lossless positive real impedance matrix Z(s) . The procedure, based on a choice of a suitable state-space representation for Z(s) , uses the minimum possible number of reactive elements and, simultaneously, the minimum possible number of gyrators.

Iterative compensation techniques for lossy or mismatched two-ports

Abstract: A method is presented for the compensation of dissipationinduced loss distortion in the passband of doubly terminated low-pass reactance filters, The algorithm can also be used to design iteratively lossless two-ports with prescribed terminations.

Data compression techniques as a means of reducing the storage requirements for satellite data: a quantitative comparison

Abstract: This paper reports on an investigation into the application of data compression techniques as a means of reducing the ‘on-ground’ data storage requirements that are associated with many space research programmes. The paper presents and compares quantitatively various compression techniques based on the Shannon-Fano, ‘run-length’ and Hadamard transformation methods of source encoding. The compression ratios obtained when applying the techniques to actual satellite data are given and some new basic theory relating to ‘run-length’ encoding is presented.