Title :
A least-squares pole-zero algorithm in the frequency and Walsh domains with applications to speech representation
Author :
Mikhael, Wasfy B. ; Spanias, Andreas S.
Author_Institution :
Dept. of Electr. Eng., Univ. of Central Florida, Orlando, FL, USA
Abstract :
A spectral envelope matching technique is presented to allow coding of the mixed DFT-WHT parameters at lower rates. A least-squares (LS) pole-zero algorithm is derived in the frequency-domain. Pole-zero, as well as all-zero and all-pole, solutions can be obtained using the LS algorithm. The all-pole model is employed in this research to fit finite subsets of DFT components and WHT spectral components. The all-pole function, while characterized by real coefficients, carries location, magnitude, and phase information for accurate signal synthesis. Simulation results, using speech signals, are presented to demonstrate the performance of the algorithm
Keywords :
Walsh functions; poles and zeros; signal processing; speech analysis and processing; speech synthesis; Walsh domain; all-pole model; coding; frequency domain; least-squares pole-zero algorithm; mixed DFT-WHT parameters; real coefficients; signal synthesis; spectral envelope matching technique; speech representation; speech signals; Computer errors; Discrete Fourier transforms; Fourier transforms; Frequency; Least squares methods; Narrowband; Signal representations; Signal synthesis; Speech; Wideband;
Conference_Titel :
Circuits and Systems, 1990., IEEE International Symposium on
Conference_Location :
New Orleans, LA
DOI :
10.1109/ISCAS.1990.112376
