SIGNAL ANALYZER, SIGNAL ANALYZING METHOD, SIGNAL SYNTHESIZER, SIGNAL SYNTHESIZING METHOD, WINDOWER, TRANSFORMER AND INVERSE TRANSFORMER

摘要

The invention relates to a signal analyzer (401 ) for processing an overlapped input signal frame (103, 105) comprising 2N subsequent input signal values. The signal analyzer (401 ) comprises: a windower adapted to window (101 ) the overlapped input signal frame to obtain a windowed signal, wherein the windower is adapted to zero M + N/2 subsequent input signal values of the overlapped input signal frame, wherein M is equal or greater than 1 and smaller than N/2; and a transformer (403) adapted to transform the remaining 3N/2 - M subsequent windowed signal values of the windowed signal using N - M sets of transform parameters to obtain a transformed-domain signal comprising N - M transformed- domain signal values.