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:
May. 20, 2003
Filed:
May. 01, 1998
Hiroshi Okawa, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
In transmitting the analog video signal via a coaxial cable, a transmission apparatus side is not provided with an emphasis characteristic which is the inverse to the frequency attenuation characteristic of the coaxial cable. In stead, an emphasis is applied by a preemphasis circuit on the transmission side, on the basis of an emphasis curve of a frequency band characteristic curve having an inverse characteristic to a frequency band characteristic curve of a detected signal which is obtained when transmitting a modulated signal without a preemphasis to the coaxial cable and conducting synchronous detection on a receiving apparatus side by using an oscillation frequency having the same frequency as that of a carrier used at the time of modulation.