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:
Aug. 31, 1993
Filed:
Dec. 07, 1990
Daniel I Schwed, Lynchburg, VA (US);
Rodney L Nickel, Lynchburg, VA (US);
John R Martin, Lynchburg, VA (US);
Ericsson GE Mobile Communications Inc., Lynchburg, VA (US);
Abstract
A radio frequency (RF) base station transmitter receiver (transceiver) system includes an audio compression arrangement that compresses a sum of multiple audio signals so that all signals within the sum are equalized to a substantially uniform audio output level despite differences in their input levels. Compression thresholds can be adjusted from a remote location. The RF base station provides audio signal compression using digital signal processing (DSP) techniques such that advanced features (e.g., noise blanking and hard limiting) and flexibility are built into the system. Line audio inputs from several sources are filtered, converted to digital signals, and processed by a digital signal processor (DSP). This DSP provides an audio compression function that selects and applies appropriate gains to the digitized audio signal. The compressed signal is converted to analog form, filtered and routed to a variety of destination such as a RF transmitter modulator or a land line.