Selective shaping of communication signals
AssigneeDEKA Products Limited Partnership
InventorsRussell H. Beavis, Derek G. Kane
Life of this patent
Estimating the term…
Abstract
Angular discrimination between signals is described. Multiple signals are sampled with multiple signal sensors spatially separated from each other. Respective transform signals are determined that are representative of each sampled signal. If a difference between the transform signals in a given transform kernel bin is greater than a difference threshold, a first transform signal is modified by altering that kernel bin. Then the resulting modified transform signal is inverse transformed.
Claims17
A method of angular discrimination between signals, the method comprising:
- sampling a plurality of signals with at least three non-coliinear microphones spatially separated from each other;
- determining respective transform signals representative of each sampled signal;
- if a phase difference between the transform signals within a transform kernel bin is greater than a phase difference threshold, modifying a first transform signal by altering the kernel bin;
- and
- inverse transforming the modified transform signal.
A method of angular discrimination between signals, the method comprising:
- sampling a plurality of sound signals with at least three non-collinear microphones spatially separated from each other;
- determining respective transform signals representative of each sampled signal by performing a Fourier transform of each sampled signal;
- if a phase difference between the transform signals within a transform kernel bin is greater than a phase difference threshold, modifying a first transform signal by reducing the transform kernel bin to zero;
- and
- inverse transforming the modified transform signal.
Dependencies are inferred from the claim text.