Estimation of synthetic audio prototypes with frequency-based input signal decomposition

摘要

An approach to forming output signals both permits flexible and temporally and/or frequency local processing of input signals while limiting or mitigating artifacts in such output signals. Generally, the approach involves first synthesizing prototype signals for the output signals, or equivalently characterizing such prototypes, for example, according to their statistical characteristics, and then forming the output signals as estimates of the prototype signals, for example, as weighted combinations of the input signals.

主权项

1. A method comprising:
using a component analyzer to decompose input signals into input signal components representing different frequency components at each of a series of times; using a prototype generator to determine a characterization of one or more prototype signals from the input signals, the characterization of the one or more prototype signals comprising a plurality of prototype components representing different frequency components at each of the series of times; and using an estimator, executed by a sound processing device, to process a prototype signal of the one or more prototype signals to form an output signal as an estimate of the prototype signal, the estimate being based on, and varying in accordance with, the input signals used to determine a characterization of the prototype signal, the output signal corresponding to a combination of the input signals used to determine the characterization of the prototype signal; wherein forming the output signal as an estimate of the prototype signal comprises determining a minimum error estimate of the prototype signal.