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:
Nov. 01, 1994
Filed:
Oct. 08, 1993
Kyeong S Kim, Seoul, KR;
Goldstar Co., Ltd., Seoul, KR;
Abstract
A NTSC/HDTV community receiving system having a microcomputer, HDTV and NTSC tuners and NTSC and HDTV intermediate frequency detectors. The system includes an A/D converter for converting HDTV and NTSC intermediate frequency signals into digital signals and a demodulator for demodulating a NTSC frame color signal into an original state and demodulating the resultant digital HDTV signal from the A/D converter into a base band level state. A first comb filter removes a NTSC interference signal from the demodulated HDTV signal and extracts a NTSC line color signal from the resultant digital NTSC signal from the A/D converter, and a second comb filter extracts a motion coefficient, the NTSC frame color signal and a NTSC frame luminance signal from the resultant digital NTSC signal from the A/D converter and the NTSC line color signal from the first cob filter. A decoder extracts original HDTV color and luminance signals from the HDTV signal from the first comb filter, and a scan rate transformer line and pixel-interpolates the resultant NTSCI and NTSCQ color signals from the demodulator and the NTSC frame luminance signal from the second comb filter to match a scan rate of the NTSC signal to that of the HDTV signal. A display state controller controls display states of the NTSC and HDTV signals.