Title :
Data compression algorithm for transient recording system
Author :
De Oliveira Nascimento, Francico Assis
Author_Institution :
Dept. de Electr. Eng., Brasilia Univ., Brazil
Abstract :
A technique for data compression for a transient recording system is presented. This algorithm is based on adaptive transform coding applied in the segmented voltage or current of the transient recorded data. It uses threshold and zonal sampling to select significant coefficients to represent the original signal. The algorithm of significant coefficient selection is delimited by an imposed segmental signal-to-noise ratio in each segment of the power systems signals. The bit allocation scheme uses a codebook for vectorial classification. Good objective and subjective results were obtained
Keywords :
Hartley transforms; adaptive codes; data compression; discrete cosine transforms; power system transients; signal processing; signal sampling; transform coding; transient analysis; Hartley transform; adaptive transform coding; bit allocation scheme; data compression algorithm; discrete cosine transform; lapped orthogonal transform; power systems signals; segmental signal-to-noise ratio; segmented current; segmented voltage; signal reconstruction; threshold sampling; transient recording system; vectorial classification; zonal sampling; Data compression; Discrete cosine transforms; Fault diagnosis; IEEE catalog; Iterative algorithms; Power system transients; Signal processing; Signal to noise ratio; Steady-state; Voltage;
Conference_Titel :
Industrial Electronics, 1997. ISIE '97., Proceedings of the IEEE International Symposium on
Conference_Location :
Guimaraes
Print_ISBN :
0-7803-3936-3
DOI :
10.1109/ISIE.1997.648898
