Title :
Real-Time Iterative Spectrum Inversion with Look-Ahead
Author :
Zhu, Xinglei ; Beauregard, Gerald T. ; Wyse, Lonce
Author_Institution :
Inst. for Infocomm Res., Singapore
Abstract :
In this paper, we present an algorithm for real-time iterative spectrogram inversion (RTISI) with look-ahead (RTISI-LA). RTISI-LA reconstructs a time-domain signal from a given sequence of short-time Fourier transform magnitude (STFTM) spectra without phase information. Whereas RTISI reconstructs the current frame using only magnitude spectra information for previous frames and the current frame, RTISI-LA also uses magnitude spectra for a small number future frames. This allows RTISI-LA to achieve substantially higher signal-to-noise (SNR) performance than either RTISI or the Griffin & Lim method with an equivalent computational load, while retaining the real-time properties of RTISI
Keywords :
Fourier transform spectra; iterative methods; real-time systems; signal reconstruction; spectral analysis; time-domain analysis; RTISI-LA algorithm; STFTM spectra; look-ahead; real-time iterative spectrogram inversion; short-time Fourier transform magnitude; time-domain signal reconstruction; time-sequence; Fourier transforms; High performance computing; Iterative algorithms; Iterative methods; Phase estimation; Signal analysis; Spectrogram; Speech; Time domain analysis; Time frequency analysis;
Conference_Titel :
Multimedia and Expo, 2006 IEEE International Conference on
Conference_Location :
Toronto, Ont.
Print_ISBN :
1-4244-0366-7
Electronic_ISBN :
1-4244-0367-7
DOI :
10.1109/ICME.2006.262424
