Title :
Adaptive filtering for broad band signal reconstruction using spectrum extrapolation
Author :
Yasukawa, Hiroshi
Author_Institution :
NTT Opt. Network Syst. Labs, Kanagawa, Japan
Abstract :
This paper describes the implementation of a speech quality enhancement system that achieves spectrum extrapolation of band limited signals. In telephone communication, spectrum based on aliasing processing is widely known. This paper proposes a new implementation using an adaptive method. This method introduces frequency domain adaptive digital filtering to broaden band limited signals into wide band signals. Implementation of the system and its performance are discussed
Keywords :
adaptive filters; adaptive signal processing; digital filters; extrapolation; filtering theory; signal reconstruction; spectral analysis; speech enhancement; speech processing; telephony; adaptive filtering; adaptive method; aliasing processing; band limited signals; broadband signal reconstruction; frequency domain adaptive digital filtering; spectrum extrapolation; speech quality enhancement system; system performance; telephone communication; wideband signals; Adaptive filters; Band pass filters; Extrapolation; Finite impulse response filter; Frequency; Sampling methods; Signal reconstruction; Speech enhancement; Telephony; Wideband;
Conference_Titel :
Digital Signal Processing Workshop Proceedings, 1996., IEEE
Conference_Location :
Loen
Print_ISBN :
0-7803-3629-1
DOI :
10.1109/DSPWS.1996.555487
