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. 02, 1993
Filed:
Dec. 17, 1991
Applicant:
Inventors:
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
375 27 ; 375121 ; 375122 ; 375 30 ; 341143 ;
Abstract
An integral digital receive gain (44) for a G.721 or G.726 ADPCM decoder (28a) or the like in an application such as a CT-2 handset (20) allows digital volume control without the need for external components. The digital receive gain (44) receives a reconstructed signal s.sub.r (k) and a variable gain factor. The integral digital receive gain (44) multiplies the reconstructed signal by the gain factor and provides the result as an input to an output PCM format conversion (45). The digital receive gain (44) also disables a synchronous coding adjustment (46) if a gain setting other than unity gain is detected.