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. 29, 1985
Filed:
Aug. 26, 1982
Kerns H Powers, Princeton, NJ (US);
RCA Corporation, Princeton, NJ (US);
Abstract
A digital television system in which signals are sampled at 13.5 MHz and produce an integer number of samples during each horizontal line interval whether the signals are based upon PAL/SECAM or NTSC standards. In order to make the digital system hierarchical and to adapt it for simple transcoding from an NTSC signal sampled at 4 times color subcarrier, the number of samples occurring during the active portion of each horizontal line is made equal to 704. Transcoding by interpolation from 4XSC--sampled NTSC video to the digital system is accomplished by selecting a particular number of samples per active line such that small blocks of samples can be transcoded independently, which allows interpolation to be achieved simply.