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:
Sep. 12, 2000
Filed:
Apr. 21, 1997
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
An RDS signal is binarized by a comparator (2) and the output is sampled by a regeneration clock in synchronism with a regeneration carrier to provide sampled data. Then, by means of an accumulator (an adder 6 and a D-FF7) or a low pass filter (12), an integration result of the sampled output is obtained for each biphase symbol and by means of a biphase decoder circuit (9), the integration results are subjected to a subtraction between two symbols making up a pair. A differentially coded RDS data can be obtained using the sign of the subtraction result, which is differentially decoded in a differential decoder circuit (11) to provide an RDS data. In addition, the absolute value of the subtraction result is compared with a predetermined threshold value to provide reliability data for each differentially coded RDS data using the comparison result. The lower one of the consecutive reliability data may be assumed to be the reliability data for the RDS data.