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:
Mar. 27, 1990
Filed:
Sep. 28, 1988
Applicant:
Inventor:
Krishnamoorthy Virupaksha, Rockville, MD (US);
Assignee:
Communications Satellite Corporation, Washington, DC (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G10L / ;
U.S. Cl.
CPC ...
381 31 ;
Abstract
An apparatus for detecting the modulation rate of voice-band data signals. The detector determines the level occupancy L.sub.p, the partial entropy E.sub.p, and the zero-crossing count N.sub.zc for the input signal and compares these values with threshold values to determine the data rate.