The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 20, 2007
Filed:
Jan. 30, 2002
Changxue MA, Barrington, IL (US);
Mark Randolph, Kildeer, IL (US);
Changxue Ma, Barrington, IL (US);
Mark Randolph, Kildeer, IL (US);
Motorola Inc., Schaumburg, IL (US);
Abstract
Speech presence is detected by first bandpass filtering () the speech to split it into banks of sub-bands. A matrix of shift registers () store each sub-band of speech. A power determining circuit () then determines individual power measurements of the speech stored in each shift register element. A variance combining circuit () combines the individual power measurements to provide a variance for the individual shift registers. A comparator circuit () finally compares the variance with at least one threshold to indicate whether speech is detected.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile