ADAPTIVE CORRELATION WINDOW FOR OPEN-LOOP PITCH

Title:

ADAPTIVE CORRELATION WINDOW FOR OPEN-LOOP PITCH

Document Type and Number:

WIPO Patent Application WO2004084179

Kind Code:

A3

Abstract:

An approach for adaptively adjusting the correlation window for open-loop pitch determination is presented. Correlation between a windowed reference signal (or target signal ) and a candidate signal is maximized under most conditions by sliding the reference window by a delta increment in either direction to capture peak energy. The traditional fixed size of the correlation window is maintained. However, the window slides forward and/or backwards to capture peak energy within the window (Figure 3) . The position of the adjusting or sliding window is allowed to shift in a small range or increment in either direction to maximize the energy of the windowed signal thus making sure that at least one peak energy is captured within the window.

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Inventors:

GAO YANG (US)

Application Number:

PCT/US2004/007580

Publication Date:

August 24, 2006

Filing Date:

March 11, 2004

Export Citation:

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Assignee:

MINDSPEED TECH INC (US)

International Classes:

G10L19/00; G10L19/04; G10L19/08; G10L19/12; G10L19/14; G10L21/02; G10L25/90

Foreign References:

US6453287B1	2002-09-17
US6873954B1	2005-03-29
US6526376B1	2003-02-25

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