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:
Oct. 28, 1997
Filed:
Dec. 06, 1994
Makoto Ohnishi, Tokyo, JP;
Masaaki Ohta, Zushi, JP;
Ikuzi Fuzitani, Tokyo, JP;
Toshiaki Nario, Tokyo, JP;
Kazuhisa Hayeiwa, Tokyo, JP;
Yoshihiko Nasu, Tokyo, JP;
Hitachi Denshi Kabushiki Kaisha, Tokyo, JP;
Nippon Hoso Kyokai, Tokyo, JP;
Abstract
The FM stereo broadcasting apparatus has a sampling frequency converter for receiving a digital input signal having an L (left audio)-signal and an R (right audio)-signal and for converting the digital input signal so that its sampling frequency is equal to either a frequency of a subcarrier of a composite audio signal or a first sampling frequency of a first sampling signal for the operation of a composite audio signal generator, a sampling signal generator for generating the first sampling signal for the operation of the composite audio signal generator having the first sampling frequency which is equal to 2.sup.N times (N is an integer of 1 or above) as high as the frequency of the subcarrier, a composite audio signal generator which is operated by the first sampling signal and which generates the composite audio signal on the basis of a pilot signal and the L-signal and R-signal of the input signal from the first frequency converter, and a frequency modulator for modulating the frequency of a carrier signal by the composite audio signal from the composite audio signal generator so as to produce a frequency-modulated signal.