Conference Publication Details
Mandatory Fields
T. Lysaght, J. Timoney and V. Lazzarini
PROCEEDINGS OF DIGITAL AUDIO EFFECTS
Modal distribution synthesis from sub-sampled autocorrelation function
2007
Unknown
Published
1
()
Optional Fields
73
76
The problem of signal synthesis from bilinear time-frequency representations such as the Wigner distribution has been investi-gated [1,2,4] using methods which exploit an outer-product inter-pretation of these distributions. The Modal distribution is a time-frequency distribution specifically designed to model the quasi-harmonic, multi-sinusoidal, nature of music signals and belongs to the Cohen general class of time-frequency distributions. Existing methods of synthesis from the Modal distribution [3] are based on a sinusoidal-analysis-synthesis procedure using estimates of in-stantaneous frequency and amplitude values. In this paper we develop an innovative synthesis procedure for the Modal distribu-tion based on the outer-product interpretation of bilinear time-frequency distributions. We also propose a streaming object-oriented implementation of the resynthesis in the SndObj library [6] based on previous work which implemented a streaming im-plementation of the Modal distribution [7]. The theoretical back-ground to the Modal distribution and to signal synthesis of Wigner distributions is first outlined followed by an explanation of the design and implementation of the Modal distribution synthesis. Suggestions for future extensions to the synthesis procedure are given.
Grant Details