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:
Dec. 03, 1985
Filed:
Nov. 09, 1983
Hiroki Uemura, Tokyo, JP;
Pioneer Electronic Corp., Tokyo, JP;
Abstract
A frequency-division multiplex communication method and system in which a data signal is multiplexed with a TV signal in such a manner that interference between the data signal and the video and audio TV signals is substantially eliminated without the need for filters having sharp skirts. A carrier signal, lying in a frequency band assigned to the audio signals, is inserted into the composite TV signal frequency shifted by a predetermined amount relative to the audio component. This carrier signal is FM modulated with a data signal. The modulated data signal is combined with the modulated audio signal for transmission. For receiving, the audio signal band is separated into separate bands. The modulated data signal is separated with the use of an inter-carrier signal between the modulated audio signal and at least one carrier signal from among the separated audio signal inband components. The separated data signal is then FM detected, and subsequently reproduced.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile