System for estimating signals received in the form of mixed signals
AssigneeU.S. Philips Corporation
InventorYannick Deville
Life of this patent
Estimating the term…
Abstract
Source separation system for processing input signals (E.sub.i (t)) formed by instantaneous linear mixtures of primary signals (X.sub.j (t)) that result from sources (S1-Sn) and for producing at least one estimated primary signal (x.sub.k (t)) . The system includes separation apparatus (10) and characterization apparatus (15) which determine cumulants of the input signals for extracting estimated mixing coefficients (.alpha..sub.ij). The coefficients are transformed into separation coefficients (C.sub.ki, d.sub.ki) in the separation apparatus (10). The separation apparatus (10) may have a direct structure or a recursive structure.
Claims13
A source separation system for processing input signals formed by instantaneous linear mixtures of primary signals that result from sources and for producing at least one estimated primary signal, which mixtures cause mixing coefficients to occur, the system comprising:
- source separation means having a number of inputs for receiving the input signals and at least one output for producing the estimated primary signal, the source separation means adaptively determining separation coefficients which are used for extracting the estimated primary signals as a linear combination of the input signals;
- and
- characterization means having input means coupled to receive the input signals for estimating the mixing coefficients based upon the input signals, and have at least one output for supplying estimated mixing coefficients;
- and wherein the source separation means have at least one further input for receiving the estimated mixing coefficients and include means for transforming the estimated mixing coefficients into separation coefficients defining the linear combination of the input signals.
A source separation system for processing input signals formed by instantaneous-linear mixtures of primary signals that result from sources and for producing at least one estimated primary signal, which mixtures cause mixing coefficients to occur, the system comprising:
- source separation means responsive to the input signals for providing the at least one estimated primary signal as a linear combination of the input signals;
- and
- characterization means responsive to the input signals for estimating the mixing coefficients based upon the input signals so as to obtain estimated mixing coefficients;
- and wherein the source separation means receive the estimated mixing coefficients and include means for transforming the estimated mixing coefficients into separation coefficients defining the linear combination of the input signals.
Dependencies are inferred from the claim text.