US Patent Issued to Cypress Semiconductor on Jan. 27 for "Low complexity sub-band speech onset detection (SOD)" (California Inventor)

ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,537,021, issued on Jan. 27, was assigned to Cypress Semiconductor Corp. (San Jose, Calif.).

"Low complexity sub-band speech onset detection (SOD)" was invented by Robert Zopf (Rancho Santa Margarita, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Techniques are disclosed for a low-power and low-complexity speech onset detector (SOD) that uses a fractional-band filter structure and spectral subtraction technique to derive sub-band energy profiles to detect the onset of speech in the presence of noise. The SOD derives the sub-band energy profiles by filtering and down-sampling a full-band input audio signal using the fractional-bandwidth filter str...