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. 28, 1984
Filed:
Feb. 16, 1982
Martijn H Hofelt, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
A system for quantizing signals having a transmitter section and a receiver section interconnected by a transmission path. The transmitter section includes a quantizer, a difference producer, and a filter. An input signal is differenced with a feedback signal, filtered and quantized to produce a first quantized output signal. The first quantized output signal is filtered to produce the feedback signal. The filtered difference signal is further differenced with the quantized output signal to produce a second difference signal which is quantized to produce a second quantized output signal containing the quantizing noise of the first quantized output signal. In the receiver section a first received signal (proportional to the first quantized output signal) is summed with a second received signal (proportional to the second quantized output signal) to produce a sum signal. The first received signal and the sum signal are each filtered and summed to produce a receiver output signal substantially free of quantizing noise.