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:
Dec. 30, 2003
Filed:
Nov. 15, 2002
John M. Harris, Chicago, IL (US);
Tyler A. Brown, Mundelein, IL (US);
Lee M. Proctor, Cary, IL (US);
Robert D. Battin, Kildeer, IL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A typical radio frame ( ) comprises A, B, and C vocoded bits ( ). At the end of each frame ( ) A and B bits ( ) are inserted from a previous frame. Thus, each frame not only comprises A, B, and C bits ( ) for that frame, but also comprises those A and B bits ( ) originally transmitted in a prior frame. Thus, each frame comprises high and low priority vocoded bits ( ) from the current vocoder frame, and those higher priority bits from a preceding frame ( ). By placing an inner CRC ( ) around the most important bits of the vocoded frame, even though a frame is erased (e.g. its outer CRC ( ) failed) it can still be verified that the most important bits in the vocoded frame are correct. Since the class B and C bits can tolerate some errors, the vocoded frame can then play out if its inner CRC passes.